The short version of lyophilization fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2025-08-28. Anything still debated is marked as such rather than presented as settled.
The peptide occurs naturally in thymic tissue and has been detected in serum and other biological fluids. Reported concentrations are low, and reliable measurement generally requires immunoassay or mass spectrometry with an enrichment step. It is released from a larger precursor, prothymosin alpha, by proteolytic cleavage, although the enzymes involved are not fully characterized. Whether circulating levels reflect thymic output specifically remains an open question.
Thymosin alpha 1 is a 28-amino-acid peptide first isolated from thymosin fraction 5, a bovine thymic extract. Its sequence begins with an acetylated serine residue and carries a high proportion of acidic residues, so the molecule has a net negative charge near neutral pH. Despite the shared name, it is unrelated in sequence to the thymosin beta family. Synthetic material prepared by solid-phase peptide synthesis is identical in sequence to the natural peptide.
Several names appear in the literature for this peptide, including thymalfasin and the abbreviation T-alpha-1. Naming conventions differ among research articles, regulatory documents, and supplier catalogs, which complicates literature searches. Both synthetic and recombinant production routes yield a peptide with the same 28-residue sequence as the thymic isolate. Because the thymosin label also covers unrelated peptides, sources should be compared by sequence rather than by name alone.
Routine handling calls for storage of the lyophilized powder at refrigerated temperatures, away from light, in a sealed container. Working solutions are often prepared in sterile water or buffer and kept cold between uses. Repeated freeze-thaw cycles are generally avoided because they can promote aggregation and loss of material. Laboratories usually record lot number, reconstitution date, and storage conditions so that any change in behavior can be traced to a specific preparation.
Reverse-phase high-performance liquid chromatography is the standard technique for assessing purity and concentration, because the peptide's hydrophobicity allows clean separation from related impurities. Mass spectrometry confirms molecular identity and detects sequence errors or truncations. Amino acid analysis and peptide mapping supply additional structural confirmation when required. Chromatographic purity values reported on certificates of analysis describe the proportion of the main peak and do not by themselves establish biological activity.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C129H215N33O55 | Calculated for the acetylated 28-residue peptide |
| Appearance | White to off-white powder | Lyophilized solid recovered from aqueous buffer |
| Solubility | Freely soluble in water | Typically dissolved in water or buffer before use |
| Typical storage | -20 C or below, desiccated | Protect from light and avoid repeated freeze-thaw cycles |
| Identity testing | Reverse-phase HPLC with mass spectrometry | Retention time and measured mass confirm the sequence |
Lyophilized thymosin alpha-1 is generally stored at or below minus twenty degrees Celsius, protected from moisture and light. Short-term handling at ambient temperature is possible for dry powder, but reconstituted solutions degrade faster and are usually kept at two to eight degrees Celsius with a defined expiry of days rather than weeks. Repeated freeze-thaw cycles should be avoided because they promote aggregation and loss of potency. Exact limits depend on the formulation and should follow the supplier's documentation.
Identity and purity are normally assessed by reversed-phase high-performance liquid chromatography, which separates the peptide from related impurities and truncation products. Mass spectrometry confirms molecular mass and detects modifications such as deamidation or oxidation. Amino acid analysis and peptide mapping provide additional sequence-level confirmation. For research material, a certificate of analysis typically reports these results together with water content and counter-ion identity, since the lyophilized powder is often supplied as an acetate or trifluoroacetate salt.
Storage recommendations center on low temperature, dryness, and protection from repeated freezing and thawing. The intact powder is commonly held at 20 degrees below zero Celsius or colder, while a working solution is divided into single-use aliquots to limit freeze-thaw cycles. Buffered saline or phosphate-buffered saline at neutral pH is frequently used as a diluent. Light sensitivity is not well documented, yet amber vials or foil wrapping are common practice for long-term storage of peptide stocks.
Identity and purity are assessed with a small set of standard peptide methods. Reversed-phase high-performance liquid chromatography separates the main peak from truncated or oxidized species, and its area percentage is the usual purity measure. Mass spectrometry confirms the observed molecular mass against the expected value, while amino acid analysis or peptide mapping checks composition and sequence. Specifications for research-grade material are often stated as 95 percent or higher, though the exact limit depends on the supplier and the intended use.
Laboratory supplies of the peptide usually arrive as a lyophilized powder in sealed vials. The powder is hygroscopic, so a vial should be allowed to reach room temperature before it is opened to prevent condensation on the contents. Weighing and transfer are best performed in a low-humidity environment with clean tools. Once dissolved, the solution should be mixed gently rather than vortexed, because foaming and shear can reduce recovery of the peptide.
== History == A Swiss medical student, Friedrich Miescher (1844-1895) became ill with typhoid fever complicated with partial deafness. Although he received his MD in 1868, Miescher left medicine and turned to physiological chemistry. While Friedrich was analyzing the composition of salmon sperm, he isolated for the first time the alkaline substance of "protamine" nucleic acid in 1869 and he called it "nuclein". Albrecht Kossel (1853-1927) a German biochemist showed that the substance, called "nuclein", consisted of a protein component and a non-protein component. Kossel further isolated and described the non-protein component. This substance has become known as nucleic acid, which contains the genetic information found in all living cells. Although the first protamine was isolated by Friedrich Miescher in 1869 from salmon sperm, Protamine published article was in 1874. Later, Kossel was awarded the Nobel Prize in Physiology or Medicine in 1910 for his research in cell biology, the chemical composition of the cell nucleus, and for his work in isolating and describing nucleic acids. All protamine precipitated as the double salt of platinum and was free of sulfur and phosphorus. Protamine sulfate was originally made from the sperm of salmon. The protamine of salmon, later named "salmine", which can be extracted with hydrochloric acid and precipitated with platinum chloride, corresponds to about 26.8 % of the dried sperm. Protamine sulfate was approved for medical use in 1969 and now it is mainly made using recombinant biotechnology.
=== P granules === Another example of liquid droplets in cells are the germline P granules in Caenorhabditis elegans. These granules separate out from the cytoplasm and form droplets, as oil does from water. Both the granules and the surrounding cytoplasm are liquid in the sense that they flow in response to forces, and two of the granules can coalesce when they come in contact. When (some of) the molecules in the granules are studied (via fluorescence recovery after photobleaching), they are found to rapidly turnover in the droplets, meaning that molecules diffuse into and out of the granules, just as expected in a liquid droplet. The droplets can also grow to be many molecules across (micrometres) Studies of droplets of the Caenorhabditis elegans protein LAF-1 in vitro also show liquid-like behaviour, with an apparent viscosity
== ISO 3000 – ISO 3299 == ISO 3000:1974 Sodium tripolyphosphate for industrial use — Estimation of tripolyphosphate content — Tris(ethylenediamine) cobalt (III) chloride gravimetric method [Withdrawn without replacement] ISO 3001:1999 Plastics — Epoxy compounds — Determination of epoxy equivalent ISO 3002 Basic quantities in cutting and grinding ISO 3002-1:1982 Part 1: Geometry of the active part of cutting tools – General terms, reference systems, tool and working angles, chip breakers ISO 3002-2:1982 Part 2: Geometry of the active part of cutting tools – General conversion formulae to relate tool and working angles ISO 3002-3:1984 Part 3: Geometric and kinematic quantities in cutting ISO 3002-4:1984 Part 4: Forces, energy, power ISO 3002-5:1989 Part 5: Basic terminology for grinding processes using grinding wheels ISO 3003:1974 Dried-milk borers [Withdrawn: replaced with ISO 707] ISO 3004 Light gauge metal containers — Capacities and related cross-sections ISO 3004-1:1986 Part 1: Open-top cans for general food [Withdrawn: replaced with ISO 10653, ISO 10654, ISO/TR 11761, ISO/TR 11762, and ISO/TR 11776] ISO 3004-2:1989 Part 2: Open-top cans for meat and products containing meat for human consumption [Withdrawn: replaced with ISO 10653, ISO 10654, ISO/TR 11761, ISO/TR 11762, and ISO/TR 11776] ISO 3004-3:1986 Part 3: Open-top cans for drinks ISO 3004-4:1986 Part 4: Open-top cans for edible oil [Withdrawn: replaced with ISO 10653, ISO 10654, ISO/TR 11761, ISO/TR 11762, and ISO/TR 11776] ISO 3004-5:1988 Part 5: Open-top cans for fish and other fishery products [Withdrawn: replaced with ISO 10653, ISO 10654, ISO/TR 11761, ISO/TR 11762, and ISO/TR 11776] ISO 3004-6:1986 Part 6: Open-top cans for milk [Withdrawn: replaced with ISO 10653, ISO 10654, ISO/TR 11761, ISO/TR 11762, and ISO/TR 11776] ISO 3005:1978 Textiles — Determination of dimensional change of fabrics induced by free-steam ISO 3006:2015 Road vehicles — Passenger car wheels for road use — Test methods ISO 3007:1999 Petroleum products and crude petroleum — Determination of vapour pressure — Reid method ISO 3008 Fire resistance tests — Door and shutter assemblies ISO 3008-1:2019 Part 1: General requirements ISO 3008-2:2017 Part 2: Lift landing door assemblies ISO 3008-3:2016 Part 3: Door and shutter assemblies horizontally oriented ISO 3008-4:2021 Part 4: Linear joint fire seal materials used to seal the gap between a fire door frame and the supporting construction ISO 3009:2003 Fire-resistance tests — Elements of building construction — Glazed elements ISO 3010:2017 Bases for design of structures — Seismic actions on structures ISO 3011:2021 Rubber- or plastics-coated fabrics — Determination of resistance to ozone cracking under static conditions ISO 3012:1999 Petroleum products — Determination of thiol (mercaptan) sulfur in light and middle distillate fuels — Potentiometric method ISO 3013:1997 Petroleum products — Determination of the freezing point of aviation fuels ISO 3014:1993 Petroleum products — Determination of the smoke point of kerosine ISO 3015:2019 Petroleum and related products from natural or synthetic sources — Determination of cloud point ISO 3016:2019 Petroleum and related products from natural or synthetic sources — Determination of pour point ISO 3017:1981 Abrasive discs — Designation, dimensions and tolerances — Selection of disc outside diameter/centre hole diameter combinations [Withdrawn: replaced with ISO 21950] ISO 3018:1974 Textile floor coverings — Rectangular textile floor coverings — Determination of dimensions ISO 3019 Hydraulic fluid power — Dimensions and identification code for mounting flanges and shaft ends of displacement pumps and motors ISO 3019-1:2001 Part 1: Inch series shown in metric units ISO 3019-2:2001 Part 2: Metric series ISO 3019-3:1988 Part 3: Polygonal flanges (including circular flanges) [Withdrawn: replaced with ISO 3019-2:2001] ISO/AWI 3020 Agricultural tractors and self-propelled sprayers — Protection of the Operator (driver) against hazardous substances [Under development; originally planned ISO 3020 Test conditions for box type vertical drilling machines — Testing of the accuracy — Practical test became ISO 2772-2] ISO 3020-1 Part 1: Terminology and overview [Under development] ISO 3020-2 Part 2: Cab and HVAC design concepts [Under development] ISO 3020-3 Part 3: Classification, requirements and test procedures [Under development] ISO 3020-4 Part 4: Filters – Requirements and test procedures [Under development] ISO 3020-5 Part 5: System validation [Under development] ISO 3021:2023 Adventure tourism — Hiking and trekking activities — Requirements and recommendations [original draft unknown] ISO 3022:1988 Cinematography — 35 mm motion-picture film perforated 16 mm (1-3-0) — Cutting and perforating dimensions ISO 3023:1995 Cinematography — 65 mm and 70 mm unexposed motion-picture film — Cutting and perforating dimensions ISO 3024:1983 Cinematography — Motion-picture camera cartridge, 8 mm type S, model 1 — Camera run length, perforation cut-out and end-of-run notch in film — Specifications ISO 3025:1974 Cinematography — Motion-picture camera cartridge, 8 mm Type S, Model II — Film load position [Withdrawn without replacement] ISO 3026:1992 Cinematography — Printed 8 mm Type S image area on 35 mm motion-picture film perforated 8 mm Type S, 2R-4.227 (1664) or 5R-4.234 (1667) — Position and dimensions ISO 3027:1984 Cinematography — Magnetic stripes and recording head gaps for sound record on 8 mm Type S motion-picture films — Position and width dimensions [Withdrawn without replacement] ISO 3028:1984 Photography — Camera flash illuminants — Determination of ISO spectral distribution index (ISO/SDI) ISO 3029:1995 Photography – 126-size cartridges – Dimensions of cartridge, film and backing paper [Withdrawn without replacement] ISO 3030:2022 Rolling bearings — Radial needle roller and cage assemblies — Boundary dimensions and tolerances ISO 3031:2021 Rolling bearings — Thrust needle roller and cage assemblies, thrust washers — Boundary dimensions, geometrical product specifications (GPS) and tolerance values ISO 3032 Test conditions for pillar type vertical drilling machines — Testing of the accuracy [Draft numbered ISO 2773-2] ISO 3033 Oil of spearmint ISO 3033-1:2005 Part 1: Native type (Mentha spicata L.) ISO 3033-2:2005 Part 2: Chinese type (80% and 60%) (Mentha viridis L. var. crispa Benth.), redistilled oil ISO 3033-3:2005 Part 3: Indian type (Mentha spicata L.), redistilled oil ISO 3033-4:2005 Part 4: Scotch variety (Mentha x gracilis Sole) ISO 3034:2011 Corrugated fibreboard — Determination of single sheet thickness ISO 3035:2011 Corrugated fibreboard — Determination of flat crush resistance ISO 3036:1975 Board — Determination of puncture resistance ISO 3037:2013 Corrugated fibreboard — Determination of edgewise crush resistance (unwaxed edge method) ISO 3038:1975 Corrugated fibreboard — Determination of the water resistance of the glue bond by immersion ISO 3039:2010 Corrugated fibreboard — Determination of grammage of the component papers after separation ISO 3040:2016 Geometrical product specifications (GPS) – Dimensioning and tolerancing – Cones ISO 3041:1975 Welding requirements — Categories of service requirements for welded joints [Withdrawn without replacement] ISO 3042:1992 Cinematography — Labelling of containers for raw-stock motion-picture films and magnetic films — Minimum information specifications ISO 3043:1975 Oil of pimento berry [Withdrawn without replacement] ISO 3044:2020 Essential oil of Corymbia citriodora (Hook.) K.D. Hill and L.A.S. Johnson (syn. Eucalyptus citriodora Hook.) ISO 3045:2004 Oil of bay [Pimenta racemosa (Mill.) J.W. Moore] ISO 3046 Reciprocating internal combustion engines – Performance ISO 3046-1:2002 Part 1: Declarations of power, fuel and lubricating oil consumptions, and test methods — Additional requirements for engines for general use ISO 3046-2:1987 Part 2: Test methods [Withdrawn: replaced with ISO 3046-1:2002] ISO 3046-3:2006 Part 3: Test measurements ISO 3046-4:2009 Part 4: Speed governing ISO 3046-5:2001 Part 5: Torsional vibrations ISO 3046-6:2020 Part 6: Overspeed protection ISO 3046-7:1995 Part 7: Codes for engine power [Withdrawn: replaced with ISO 3046-1:2002] ISO 3047:1982 Cinematography — Spool, daylight loading type, for 35 mm motion-picture cameras (capacity 30 m – 100 ft) — Dimensions ISO 3048:1974 Gypsum plasters — General test conditions [Withdrawn without replacement] ISO 3049:1974 Gypsum plasters — Determination of physical properties of powder [Withdrawn without replacement] ISO 3051:1974 Gypsum plasters — Determination of mechanical properties [Withdrawn without replacement] ISO 3052:1974 Gypsum plasters — Determination of water of crystallization content [Withdrawn without replacement] ISO 3053:2004 Oil of grapefruit (Citrus x paradisi Macfad.), obtained by expression ISO 3054:2017 Essential oil of lavandin Abrial (Lavandula angustifolia Mill. × Lavandula latifolia Medik.), French type ISO 3055:2021 Kitchen equipment — Coordinating sizes ISO 3056:1986 Non-calibrated round steel link lifting chain and chain slings — Use and maintenance ISO 3057:1998 Non-destructive testing — Metallographic replica techniques of surface examination ISO 3058:1998 Non-destructive testing — Aids to visual inspection — Selection of low-power magnifiers ISO 3059:2012 Non-destructive testing — Penetrant testing and magnetic particle testing — Viewing conditions ISO 3060:1974 Textiles — Cotton fibres — Determination of breaking tenacity of flat bundles ISO 3061:2008 Oil of black pepper (Piper nigrum L.) ISO 3062:1974 Oil of sandalwood (Eucarya spicata), Australia [Withdrawn without replacement] ISO 3063:2004 Oil of ylang-ylang (Cananga odorata (Lam.) Hook. f. et Thomson forma genuina) ISO 3064:2015 Essential oil of petitgrain, Paraguayan type (Citrus aurantium L. var. Paraguay (syn. Citrus aurantium var. bigaradia Hook f.)) ISO 3065:2021 Essential oil of Eucalyptus, Australian type ISO 3066:1986 Duplicating machines — Registration [Withdrawn without replacement] ISO 3067:1983 Cinematography — Motion-picture camera cartridge, 8 mm Type S, Model I — Notches for film speed, film identification and colour-balancing filter — Dimensions and positions [Withdrawn without replacement] ISO 3068:1982 Cinematography — Magnetic stripes for sound records on 16 mm motion-picture film perforated 8 mm Type S-2R (1-4) and (1-3) — Positions and width dimensions [Withdrawn without replacement] ISO 3069:2000 End-suction centrifugal pumps — Dimensions of cavities for mechanical seals and for soft packing ISO 3070 Machine tools — Test conditions for testing the accuracy of boring and milling machines with horizontal spindle ISO 3070-0:1982 Part 0: Introduction [Withdrawn: replaced with ISO 3070-(1-3):2007] ISO 3070-1:2007 Part 1: Machines with fixed column and movable table ISO 3070-2:2016 Part 2: Machines with movable column along the X-axis (floor type) ISO 3070-3:2007 Part 3: Machines with movable column and movable table ISO 3071:2020 Textiles — Determination of pH of aqueous extract ISO 3072:1975 Wool — Determination of solubility in alkali ISO 3073:1975 Wool — Determination of acid content ISO 3074:2014 Wool — Determination of dichloromethane-soluble matter in combed sliver ISO 3075:1980 Short link chain for lifting purposes — Grade S (6) non calibrated, for chain slings etc. [Withdrawn without replacement] ISO 3076:2012 Round steel short link chains for general lifting purposes — Medium tolerance sling chains for chain slings — Grade 8 ISO 3077:2001 Short-link chain for lifting purposes — Grade T, (types T, DAT and DT), fine-tolerance hoist chain ISO 3078:2016 Shipbuilding — Cargo winches ISO 3079:2022 A two-electrode method using acetic acid to measure pitting potential of aluminium and aluminium alloys in chloride solutions [original draft unknown] ISO 3080:1974 Guide for the mechanical balancing of marine main steam turbine machinery for merchant service [Withdrawn without replacement] ISO 3081:1986 Iron ores — Increment sampling — Manual method [Withdrawn: replaced with ISO 3082] ISO 3082:2017 Iron ores – Sampling and sample preparation procedures ISO 3083:1986 Iron ores — Preparation of samples — Manual method [Withdrawn: replaced with ISO 3082] ISO 3084:1998 Iron ores — Experimental methods for evaluation of quality variation ISO 3085:2019 Iron ores — Experimental methods for checking the precision of sampling, sample preparation and measurement ISO 3086:2006 Iron ores — Experimental methods for checking the bias of sampling ISO 3087:2020 Iron ores — Determination of the moisture content of a lot ISO 3088:1975 Welding requirements — Factors to be considered in specifying requirements for fusion welded joints in steel (technical influencing factors) [Withdrawn without replacement] ISO 3089:2005 Machine tools — Test conditions for self-centring, manually operated chucks with one-piece jaws ISO 3090:1974 Ropes and cordage — Netting yarns — Determination of change in length after immersion in water [Withdrawn without replacement] ISO 3091:1975 Meat and meat products — Determination of nitrate content (Reference method) ISO/CIE TR 3092:2023 Light and lighting – Energy performance of lighting in buildings – Explanation and justification of ISO/CIE 20086 [original draft unknown] ISO 3093:2009 Wheat, rye and their flours, durum wheat and durum wheat semolina — Determination of the falling number according to Hagberg-Perten ISO 3094:1974 Fruit and vegetable products — Determination of copper content — Photometric method [Withdrawn without replacement] ISO 3095:2013 Acoustics – Railway applications – Measurement of noise emitted by railbound vehicles ISO 3096:2018 Rolling bearings — Needle rollers — Boundary dimensions, geometrical product specifications (GPS) and tolerance values ISO/R 3097:1974 Rolling bearings — Needle rollers — Light and medium series — Dimensions and tolerance values [Withdrawn: replaced with ISO 1206] ISO 3098 Technical product documentation – Lettering ISO 3098-1:2015 Part 1: General requirements ISO 3098-2:2000 Part 2: Latin alphabet, numerals and marks ISO 3098-3:2000 Part 3: Greek alphabet ISO 3098-4:2000 Part 4: Diacritical and particular marks for the Latin alphabet ISO 3098-5:1997 Part 5: CAD lettering of the Latin alphabet, numerals and marks ISO 3098-6:2000 Part 6: Cyrillic alphabet ISO 3099:1974 Oilseed residues — Determination of total nitrogen content [Withdrawn without replacement] ISO 3100 Meat and meat products — Sampling and preparation of test samples ISO 3100-1:1991 Part 1: Sampling [Withdrawn: replaced with ISO 17604] ISO 3100-2:1998 Part 2: Preparation of test samples for microbiological examination [Withdrawn: replaced with ISO 6887-2] ISO 3101:1981 Wheels and castors — Triangular top plates with three fixing holes [Withdrawn: replaced with ISO 22883 and ISO 22884] ISO 3102:1981 Wheels and castors for non-powered equipment — Off-set for swivel castors [Withdrawn: replaced with ISO 22883 and ISO 22884] ISO 3103 Tea – Preparation of liquor for use in sensory tests ISO 3104:2020 Petroleum products — Transparent and opaque liquids — Determination of kinematic viscosity and calculation of dynamic viscosity ISO 3105:1994 Glass capillary kinematic viscometers – Specifications and operating instructions ISO 3106:1974 Dental zinc oxide/eugenol filling materials [Withdrawn: replaced with ISO 3107] ISO 3107:2022 Dentistry — Zinc oxide/eugenol cements and zinc oxide/non-eugenol cements ISO 3108:2017 Steel wire ropes — Test method — Determination of measured breaking force ISO 3109:1984 Assembly tools for screws and nuts — Hexagon insert bits for hexagon socket head screws [Withdrawn: replaced with ISO 2351-3] ISO 3110:1975 Copper alloys — Determination of aluminium as alloying element — Volumetric method [Withdrawn without replacement] ISO 3111:1975 Copper alloys — Determination of tin as alloying element — Volumetric method [Withdrawn without replacement] ISO 3112:1975 Copper and copper alloys — Determination of lead — Extracting titration method [Withdrawn without replacement] ISO 3114:1977 Unplasticized polyvinyl chloride (PVC) pipes for potable water supply — Extractability of lead and tin — Test method ISO 3115:1981 Castings in magnesium alloys containing zirconium — Chemical composition and mechanical properties [Withdrawn: replaced with ISO 16220] ISO 3116:2019 Magnesium and magnesium alloys — Wrought magnesium and magnesium alloys ISO 3117:1977 Tangential keys and keyways [Withdrawn without replacement] ISO 3118:1976 Sodium perborates for industrial use — Determination of particle size distribution by mechanical sieving [Withdrawn without replacement] ISO 3119:1976 Boric acid, boric oxide and disodium tetraborates for industrial use — Determination of chromium content — Diphenylcarbazide photometric method [Withdrawn without replacement] ISO 3120:1976 diSodium tetraborates and crude sodium borates for industrial use — Determination of water content — Gravimetric method [Withdrawn without replacement] ISO 3121:1976 Boric acid, boric oxide and disodium tetraborates for industrial use — Determination of chloride content — Mercurimetric method [Withdrawn without replacement] ISO 3122:1976 Boric acid, boric oxide, disodium tetraborates, sodium perborates and crude borates for industrial use — Determination of iron content — 2,2'- Bipyridyl photometric method [Withdrawn without replacement] ISO 3123:1976 Sodium perborates for industrial use — Determination of rate of solution — Conductivity method [Withdrawn without replacement] ISO 3124:1976 Crude sodium borates for industrial use — Determination of iron soluble in alkaline medium — 2,2'- Bipyridyl photometric method [Withdrawn without replacement] ISO 3125:1976 Crude sodium borates for industrial use — Determination of aluminium soluble in alkaline medium — EDTA titrimetric method [Withdrawn without replacement] ISO 3126:2005 Plastics piping systems — Plastics components — Determination of dimensions ISO 3127:1994 Thermoplastics pipes — Determination of resistance to external blows — Round-the-clock method ISO 3129:2019 Wood — Sampling methods and general requirements for physical and mechanical testing of small clear wood specimens ISO 3130:1975 Wood — Determination of moisture content for physical and mechanical tests [Withdrawn: replaced with ISO 13061-1] ISO 3131:1975 Wood — Determination of density for physical and mechanical tests [Withdrawn: replaced with ISO 13061-2] ISO 3132:1975 Wood — Testing in compression perpendicular to grain [Withdrawn: replaced with ISO 13061-5] ISO 3133:1975 Wood — Determination of ultimate strength in static bending [Withdrawn: replaced with ISO 13061-3] ISO 3134 Light metals and their alloys — Terms and definitions ISO 3134-1:1985 Part 1: Materials [Withdrawn without replacement] ISO 3134-2:1985 Part 2: Unwrought products [Withdrawn without replacement] ISO 3134-3:1985 Part 3: Wrought products [Withdrawn without replacement] ISO 3134-4:1985 Part 4: Castings [Withdrawn without replacement] ISO 3134-5:1981 Part 5: Methods of processing and treatment [Withdrawn without replacement] ISO 3135:2025 Marking pens — Durability of written line — Documentary use (DOC) [Original draft with this number unknown] ISO 3136:2023 Rubber latex — Styrene-butadiene — Determination of bound styrene content ISO 3137:1974 Anhydrous hydrogen fluoride for industrial use — Sampling ISO 3138:1974 Anhydrous hydrogen fluoride for industrial use — Determination of non-volatile acid content — Titrimetric method [Withdrawn without replacement] ISO 3139:1976 Aqueous hydrofluoric acid for industrial use — Sampling and methods of test ISO 3140:2019 Essential oil of sweet orange expressed [Citrus sinensis (L.)] ISO 3141:1997 Oil of clove leaves [Syzygium aromaticum (L.) Merr. et Perry, syn. Eugenia caryophyllus (Sprengel) Bullock et S. Harrison] ISO 3142:1997 Oil of clove buds [Syzygium aromaticum (L.) Merr. et Perry, syn. Eugenia caryophyllus (Sprengel) Bullock et S. Harrison] ISO 3143:1997 Oil of clove stems [Syzygium aromaticum (L.) Merr. et Perry, syn. Eugenia caryophyllus (Sprengel) Bullock et S. Harrison] ISO 3144:1974 Carbon disulphide for industrial use — Sampling and methods of test ISO 3145:1974 Rolling bearings — Bearings with spherical outside surface and extended inner ring width — Eccentric locking collars [Withdrawn: replaced with ISO 9628] ISO 3146:2000 Plastics — Determination of melting behaviour (melting temperature or melting range) of semi-crystalline polymers by capillary tube and polarizing-microscope methods ISO 3147:1975 Heat exchangers — Verification of thermal balance of water-fed or steam-fed primary circuits — Principles and test requirements [Withdrawn without replacement] ISO 3148:1975 Radiators, convectors and similar appliances — Determination of thermal output — Test method using air-cooled closed booth [Withdrawn without replacement] ISO 3149:1975 Radiators, convectors and similar appliances — Determination of thermal output — Test method using liquid-cooled closed booth [Withdrawn without replacement] ISO 3150:1975 Radiators, convectors and similar appliances — Calculation of thermal output and presentation of results [Withdrawn without replacement] ISO/TR 3151 Visualization elements of PLM-MES interface [originally planned draft with this number was an engineering standard] ISO/TR 3151-1:2023 Part 1: Overview ISO/TR 3151-2:2025 Part 2: 3D error feedback in heavy industry ISO/TR 3152:2022 Road vehicles — Comparison between ISO 26262-12 and other parts of the ISO 26262 series to support motorcycle adaptation ISO 3153 Mechanical vibration — Posture in whole-body vibration environments [Under development; original draft with this number unknown] ISO 3154:1988 Stranded wire ropes for mine hoisting — Technical delivery requirements ISO 3155:1976 Stranded wire ropes for mine hoisting — Fibre components — Characteristics and tests ISO 3156:1976 Stranded wire ropes for mine hoisting — Impregnating compounds, lubricants and service dressings — Characteristics and tests ISO 3157:1991 Radioluminescence for time measurement instruments — Specifications [Withdrawn without replacement] ISO 3158:1976 Timekeeping instruments — Symbolization of control positions ISO 3159:2009 Timekeeping instruments — Wrist-chronometers with spring balance oscillator ISO 3160 Watch-cases and accessories — Gold alloy coverings ISO 3160-1:1998 Part 1: General requirements ISO 3160-2:2015 Part 2: Determination of fineness, thickness, corrosion resistance and adhesion ISO 3160-3:1993 Part 3: Abrasion resistance tests of a type of coating on standard gauges [Withdrawn: replaced with ISO 23160] ISO 3161:1999 Aerospace — UNJ threads — General requirements and limit dimensions ISO 3162:1974 Caravans and light trailers — Couplings for vacuum braking systems — Dimensional characteristics [Withdrawn without replacement] ISO 3163:2022 Adventure tourism — Terminology [original draft unknown] ISO 3164:2013 Earth-moving machinery — Laboratory evaluations of protective structures — Specifications for deflection-limiting volume ISO 3165:1976 Sampling of chemical products for industrial use — Safety in sampling ISO 3166: Codes for the representation of names of countries and their subdivisions ISO 3166-1:2020 Part 1: Country codes ISO 3166-2:2020 Part 2: Country subdivision code ISO 3166-3:2020 Part 3: Code for formerly used names of countries ISO 3167:2014 Plastics — Multipurpose test specimens ISO 3168:1998 Aerospace — Nuts, anchor, self-locking, fixed, single lug, with counterbore, with MJ threads, classifications: 1 100 MPa (at ambient temperature )/235 degrees C, 1 100 MPa (at ambient temperature )/315 degrees C and 1 100 MPa (at ambient temperature)/425 degrees C — Dimensions ISO 3169:2023 Fine ceramics (advanced ceramics, advanced technical ceramics) — Methods for chemical analysis of impurities in aluminium oxide powders using inductively coupled plasma-optical emission spectrometry [original draft unknown] ISO 3170:2004 Petroleum liquids — Manual sampling ISO 3171:1988 Petroleum liquids — Automatic pipeline sampling ISO/TR 3172:1974 Paints and varnishes — Large scale brushing test [Withdrawn without replacement] ISO 3173:1974 Road vehicles — Apparatus for measurement of the opacity of exhaust gas from diesel engines operating under steady state conditions [Withdrawn: replaced with ISO 11614] ISO 3174:1994 Aircraft — Connections for checking hydraulic systems by ground appliances — Threaded type ISO 3175 Textiles — Professional care, drycleaning and wetcleaning of fabrics and garments ISO 3175-1:2017 Part 1: Assessment of performance after cleaning and finishing ISO 3175-2:2017 Part 2: Procedure for testing performance when cleaning and finishing using tetrachloroethene ISO 3175-3:2017 Part 3: Procedure for testing performance when cleaning and finishing using hydrocarbon solvents ISO 3175-4:2018 Part 4: Procedure for testing performance when cleaning and finishing using simulated wetcleaning ISO 3175-5:2019 Part 5: Procedure for testing performance when cleaning and finishing using dibutoxymethane ISO 3175-6:2017 Part 6: Procedure for testing performance when cleaning and finishing using decamethylpentacyclosiloxane ISO 3176 Textiles — Determination of dimensional stability on dry cleaning in perchloroethylene, excluding finishing laboratory method [Rejected draft] ISO 3177:1975 Potassium hydroxide for industrial use — Determination of chlorides content — Photometric method [Withdrawn without replacement] ISO 3178:1988 Steel wire ropes for general purposes — Terms of acceptance [Withdrawn without replacement] ISO 3179:1974 Coniferous sawn timber — Nominal dimensions [Withdrawn without replacement] ISO 3180:2023 Fine ceramics (advanced ceramics, advanced technical ceramics) — Methods for chemical analysis of hydroxyapatite powders [original draft merged into ISO 3179] ISO 3181 Nanotechnologies — Total, encapsulated, and free drug quantitation in doxorubicin hydrochloride liposomal formulations using reversed phase high performance liquid chromatography (RP-HPLC) [Under development; original draft merged into ISO 3179] ISO 3182:2022 Light Measuring System for Smoke Emission Testing [original draft merged into ISO 3179] ISO 3183:2019 Petroleum and natural gas industries — Steel pipe for pipeline transportation systems ISO 3184:1998 Reach and straddle fork-lift trucks — Stability tests [Withdrawn: replaced with ISO 22915-3] ISO 3185:2021 Aerospace — Bolts, normal bihexagonal head, normal shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa — Dimensions ISO 3186:2008 Aerospace — Bolts, large bihexagonal head, normal shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes 1 250 MPa to 1 800 MPa — Dimensions ISO 3187:1989 Refractory products — Determination of creep in compression ISO 3188:1978 Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Titrimetric method ISO 3189 Sockets for wire ropes for general purposes ISO 3189-1:1985 Part 1: General characteristics and conditions of acceptance [Withdrawn without replacement] ISO 3189-2:1985 Part 2: Special requirements for sockets produced by forging or machined from the solid [Withdrawn without replacement] ISO 3189-3:1985 Part 3: Special requirements for sockets produced by casting [Withdrawn without replacement] ISO 3190:1975 Test conditions for turret and single spindle co-ordinate drilling machines with vertical spindle — Testing of the accuracy ISO 3191:1998 Aerospace — Nuts, anchor, self-locking, fixed, single lug, reduced series, with counterbore, with MJ threads, classifications: 1 100 MPa (at ambient temperature)/235 degrees C, 1 100 MPa (at ambient temperature)/315 degrees C and 1 100 MPa (at ambient temperature)/425 degrees C — Dimensions ISO 3193:2008 Aerospace — Bolts, normal hexagonal head, normal shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa — Dimensions ISO 3194:1975 Potassium hydroxide for industrial use — Determination of sulphur compounds — Method by reduction and titrimetry [Withdrawn without replacement] ISO 3195:1975 Sodium hydroxide for industrial use — Sampling — Test Sample — Preparation of the main solution for carrying out certain determinations [Withdrawn without replacement] ISO 3196:1975 Sodium hydroxide for industrial use — Determination of carbonates content — Titrimetric method ISO 3197:1975 Sodium hydroxide for industrial use — Determination of chlorides content — Photometric method [Withdrawn without replacement] ISO 3198:1975 Sodium hydroxide for industrial use — Determination of sulphur compounds — Method by reduction and titrimetry [Withdrawn without replacement] ISO 3199:1975 Sodium chlorate for industrial use — Determination of chlorate content — Dichromate titrimetric method ISO 3200:1975 Sodium and potassium silicates for industrial use — Determination of sulphates content — Barium sulphate gravimetric method [Withdrawn without replacement] ISO 3201:1975 Sodium and potassium silicates for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method [Withdrawn without replacement] ISO 3202:1997 Aerospace — Screws, pan head, internal offset cruciform ribbed or unribbed drive, threaded to head, MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa — Dimensions ISO 3203:1993 Aerospace — Bolts, normal bihexagonal head, normal or pitch diameter shank, long length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa — Dimensions ISO 3205:1976 Preferred test temperatures [Withdrawn without replacement] ISO 3206:1975 Surface active agents — Analysis of technical alkane sulphonates — Determination of alkane monosulphonates content [Withdrawn without replacement] ISO 3207:1975 Statistical interpretation of data — Determination of a statistical tolerance interval [Withdrawn: replaced with ISO 16269-6] ISO 3208:1974 Road vehicles — Evaluation of protrusions inside passenger cars ISO 3209:2016 Aerospace — Nuts, anchor, self-locking, floating, two lug, with counterbore, with MJ threads, classifications: 1 100 MPa (at ambient temperature )/235 degrees C, 1 100 MPa (at ambient temperature )/315 degrees C and 1 100 MPa (at ambient temperature)/425 degrees C — Dimensions ISO 3210:2017 Anodizing of aluminium and its alloys — Assessment of quality of sealed anodic oxidation coatings by measurement of the loss of mass after immersion in acid solution(s) ISO 3211:2018 Anodizing of aluminium and its alloys — Assessment of resistance of anodic oxidation coatings to cracking by deformation ISO 3212:1975 Polypropylene pipes — Burst test requirements [Withdrawn without replacement] ISO 3213:2009 Polypropylene (PP) pipes — Effect of time and temperature on the expected strength ISO 3214:2000 Oil of Litsea cubeba (Litsea cubeba Pers.) ISO 3215:1998 Oil of nutmeg, Indonesian type (Myristica fragrans Houtt.) ISO 3216:1997 Oil of cassia, Chinese type (Cinnamomum aromaticum Nees, syn. Cinnamomum cassia Nees ex Blume) ISO 3217:1974 Oil of lemongrass (Cymbopogon citratus) ISO 3218:2014 Essential oils — Principles of nomenclature ISO 3219 Rheology ISO 3219-1:2021 Part 1: Vocabulary and symbols for rotational and oscillatory rheometry ISO 3219-2:2021 Part 2: General principles of rotational and oscillatory rheometry ISO 3220:1975 Copper and copper alloys — Determination of arsenic — Photometric method ISO 3221:1998 Aerospace — Nuts, anchor, self-locking, fixed, 90 degrees corner, with counterbore, with MJ threads, classifications: 1 100 MPa (at ambient temperature)/235 degrees C, 1 100 MPa (at ambient temperature)/315 degrees C and 1 100 MPa (at ambient temperature)/425 degrees C — Dimensions ISO 3222:1998 Aerospace — Nuts, anchor, self-locking, fixed, closed corner, reduced series, with counterbore, with MJ threads, classifications: 1 100 MPa (at ambient temperature)/235 degrees C, 1 100 MPa (at ambient temperature)/315 degrees C and 1 100 MPa (at ambient temperature)/425 degrees C — Dimensions ISO 3223:1998 Aerospace — Nuts, anchor, self-locking, fixed, two lug, with counterbore, with MJ threads, classifications: 1 100 MPa (at ambient temperature )/235 degrees C, 1 100 MPa (at ambient temperature )/315 degrees C and 1 100 MPa (at ambient temperature)/425 degrees C — Dimensions ISO 3224:1998 Aerospace — Nuts, anchor, self-locking, floating, single lug, with counterbore, with MJ threads, classifications: 1 100 MPa (at ambient temperature )/235 degrees C, 1 100 MPa (at ambient temperature )/315 degrees C and 1 100 MPa (at ambient temperature)/425 degrees C — Dimensions ISO 3225:1998 Aerospace — Nuts, anchor, self-locking, fixed, two lug, reduced series, with counterbore, with MJ threads, classifications: 1 100 MPa (at ambient temperature)/235 degrees C, 1 100 MPa (at ambient temperature)/315 degrees C and 1 100 MPa (at ambient temperature)/425 degrees C — Dimensions ISO 3228:2013 Rolling bearings — Cast and pressed housings for insert bearings — Boundary dimensions and tolerances ISO 3230:1998 Aerospace — Rivets, solid, 100 degrees normal countersunk head with dome, metallic material, with or without surface treatment — Dimensions ISO 3231:1993 Paints and varnishes — Determination of resistance to humid atmospheres containing sulfur dioxide [Withdrawn: replaced with ISO 22479] ISO 3232:1974 Paints and varnishes — Determination of quantity of material in a container [Withdrawn without replacement] ISO 3233 Paints and varnishes — Determination of percentage volume of non-volatile matter ISO 3233-1:2019 Part 1: Method using a coated test panel to determine non-volatile matter and to determine dry-film density by the Archimedes' principle ISO 3233-2:2019 Part 2: Method using the determination of non-volatile-matter content in accordance with ISO 3251 and determination of dry film density on coated test panels by the Archimedes' principle ISO 3233-3:2015 Part 3: Determination by calculation from the non-volatile-matter content determined in accordance with ISO 3251, the density of the coating material and the density of the solvent in the coating material ISO 3234:1975 Sodium sulphate for industrial use — Determination of loss in mass at 110 degrees C [Withdrawn without replacement] ISO 3235:1975 Sodium sulphate for industrial use — Determination of acid-insoluble matter [Withdrawn without replacement] ISO 3236:1975 Sodium sulphate for industrial use — Determination of chlorides content — Mercurimetric method [Withdrawn without replacement] ISO 3237:1975 Sodium sulphate for industrial use — Determination of sulphates content — Calculation method and barium sulphate gravimetric method [Withdrawn without replacement] ISO 3238:1975 Sodium sulphate for industrial use — Determination of calcium content — EDTA complexometric method [Withdrawn without replacement] ISO 3239:1975 Sodium sulphate for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method [Withdrawn without replacement] ISO 3240:1975 Sodium sulphate for industrial use — Determination of acidity or alkalinity [Withdrawn without replacement] ISO 3241:1975 Sodium sulphate for industrial use — Measurement of pH — Potentiometric method [Withdrawn without replacement] ISO/TR 3242:2022 Blockchain and distributed ledger technologies – Use cases [original draft unknown] ISO 3243:1975 Keyboards for countries whose languages have alphabetic extenders — Guidelines for harmonization [Withdrawn: replaced with ISO 9995-(1,7)] ISO 3244:1984 Office machines and data processing equipment — Principles governing the positioning of control keys on keyboards [Withdrawn: replaced with ISO 9995-(1,7)] ISO 3245:2015 Rolling bearings — Needle roller bearings with drawn cup and without inner ring — Boundary dimensions, geometrical product specifications (GPS) and tolerance values ISO 3246:1977 Dentistry — Working space of the dentist — Definitions and principles [Withdrawn without replacement] ISO 3247 Mosaic parquet panels — Classification of oak strips [Rejected draft] ISO 3248:2016 Paints and varnishes — Determination of the effect of heat ISO 3249:1975 Reciprocating internal combustion engines — Definitions of locations on an engine [Withdrawn: replaced with ISO 1204] ISO/TS 3250:2021 Petroleum, petrochemical and natural gas industries — Calculation and reporting production efficiency in the operating phase [Original draft with this number unknown] ISO 3251:2019 Paints, varnishes and plastics — Determination of non-volatile-matter content ISO 3252:2019 Powder metallurgy – Vocabulary ISO 3253:1998 Gas welding equipment — Hose connections for equipment for welding, cutting and allied processes [Withdrawn: replaced with ISO/TR 28821] ISO 3254:1989 Shipbuilding and marine structures — Toughened safety glass panes for rectangular windows [Withdrawn: replaced with ISO 21005] ISO 3255:1974 Magnesium and magnesium alloys — Determination of aluminium — Chromazurol S photometric method ISO 3256:1977 Aluminium and aluminium alloys — Determination of magnesium — Atomic absorption spectrophotometric method ISO 3257:1992 Rubber compounding ingredients — Carbon black — Method of evaluation in styrene-butadiene rubbers [Withdrawn without replacement] ISO 3258:1976 Air distribution and air diffusion — Vocabulary [Withdrawn without replacement] ISO 3259 Pulps — Determination of pentosans content — Furfural method [Rejected draft] ISO 3260:2015 Pulps — Determination of chlorine consumption (Degree of delignification) ISO 3261:1975 Fire tests — Vocabulary [Withdrawn without replacement] ISO 3262 Extenders — Specifications and methods of test ISO 3262-1:2020 Part 1: Introduction and general test methods ISO 3262-2:1998 Part 2: Barytes (natural barium sulfate) ISO 3262-3:1998 Part 3: Blanc fixe ISO 3262-4:1998 Part 4: Whiting ISO 3262-5:1998 Part 5: Natural crystalline calcium carbonate ISO 3262-6:1998 Part 6: Precipitated calcium carbonate ISO 3262-7:1998 Part 7: Dolomite ISO 3262-8:1998 Part 8: Natural clay ISO 3262-9:1997 Part 9: Calcined clay ISO 3262-10:2000 Part 10: Natural talc/chlorite in lamellar form ISO 3262-11:2000 Part 11: Natural talc, in lamellar form, containing carbonates ISO 3262-12:2001 Part 12: Muscovite-type mica ISO 3262-13:1997 Part 13: Natural quartz (ground) ISO 3262-14:2000 Part 14: Cristobalite ISO 3262-15:2000 Part 15: Vitreous silica ISO 3262-16:2000 Part 16: Aluminium hydroxides ISO 3262-17:2000 Part 17: Precipitated calcium silicate ISO 3262-18:2000 Part 18: Precipitated sodium aluminium silicate ISO 3262-19:2021 Part 19: Precipitated silica ISO 3262-20:2021 Part 20: Fumed silica ISO 3262-21:2000 Part 21: Silica sand (unground natural quartz) ISO 3262-22:2000 Part 22: Flux-calcined kieselguhr ISO 3263:1974 Continuous mechanical handling equipment for loose bulk materials — Bucket elevators — Safety code [Withdrawn: replaced with ISO 7149] ISO 3264:1974 Continuous mechanical handling equipment for loose bulk materials — Screw feeders and conveyors — Safety code [Withdrawn: replaced with ISO 7149] ISO 3265:1974 Continuous mechanical handling equipment for loose bulk materials — Wagon tipplers handling rail-borne wagons (rotary, side discharge and end discharge) — Safety code ISO 3266:2010 Forged steel eyebolts grade 4 for general lifting purposes ISO 3267:1991 Road vehicles — Headlamp cleaners [Withdrawn without replacement] ISO 3268:1978 Plastics — Glass reinforced materials — Determination of tensile properties [Withdrawn: replaced with ISO 527-(4-5)] ISO 3269:2019 Fasteners — Acceptance inspection ISO 3270:1984 Paints and varnishes and their raw materials — Temperatures and humidities for conditioning and testing ISO 3271:2015 Iron ores for blast furnace and direct reduction feedstocks — Determination of the tumble and abrasion indices ISO 3272 Microfilming of technical drawings and other drawing office documents ISO 3272-1:2003 Part 1: Operating procedures ISO 3272-2:1994 Part 2: Quality criteria and control of 35 mm silver gelatin microfilms ISO 3272-3:2001 Part 3: Aperture card for 35 mm microfilm ISO 3272-4:1994 Part 4: Microfilming of drawings of special and exceptional elongated sizes ISO 3272-5:1999 Part 5: Test procedures for diazo duplicating of microfilm images in aperture cards [Withdrawn without replacement] ISO 3272-6:2000 Part 6: Quality criteria and control of systems for enlargements from 35 mm microfilm ISO 3273 Transparent A6 Microfiche – Additional physical characteristics [Rejected draft] ISO 3274:1996 Geometrical Product Specifications (GPS) – Surface texture: Profile method – Nominal characteristics of contact (stylus) instruments [Withdrawn: replaced with ISO 25178-601] ISO 3275:1974 Information processing – Implementation of the 7- bit coded character set and its 7- bit and 8- bit extensions on 3,81 mm magnetic cassette for data interchange ISO 3276:1975 Continuous mechanical handling equipment for unit loads — Belt conveyors (canvas, rubber, plastic, etc.), steel band conveyors and wire mesh belt conveyors — Safety code [Withdrawn: replaced with ISO 7149] ISO 3277:1974 Continuous mechanical handling equipment for unit loads — Suspended swing-tray conveyors and fixed-tray conveyors — Safety code [Withdrawn: replaced with ISO 7149] ISO 3278:1974 Continuous mechanical handling equipment for unit loads — Canvas-sling elevators and conveyors — Safety code [Withdrawn: replaced with ISO 7149] ISO 3279:1974 Continuous mechanical handling equipment for unit loads — Hydraulic conveyors — Safety code [Withdrawn: replaced with ISO 7149] ISO 3280:1974 Continuous mechanical handling equipment for unit loads — Gravity roller and wheel conveyors, extensible-roller or telescopic-roller conveyors, and hinged-roller conveyors (gates) — Safety code [Withdrawn: replaced with ISO 7149] ISO 3281:1974 Continuous mechanical handling equipment for unit loads — Spiral roller conveyor chutes, spiral chutes, and chutes for packages — Safety code [Withdrawn: replaced with ISO 7149] ISO 3282:1976 Aircraft — Dimensions for single-hole and triple-hole mounting (Class 3) lever-operated manual switches ISO 3283:1974 Continuous mechanical handling equipment — Transfer points — Safety code [Withdrawn: replaced with ISO 7149] ISO 3284:1974 Continuous mechanical handling equipment for loose bulk materials — Dimensions of bends for use in pneumatic handling ISO 3285:1986 Road vehicles — Ignition coil mounting brackets [Withdrawn without replacement] ISO 3286:2016 Single point cutting tools — Corner radii ISO 3287:1999 Powered industrial trucks – Symbols for operator controls and other displays ISO 3288 Individual space heating appliances — General test methods [Rejected draft] ISO 3289 Independent room heaters burnings solid fuel — Particular test methods [Rejected draft] ISO 3290 Rolling bearings — Balls ISO 3290-1:2014 Part 1: Steel balls ISO 3290-2:2014 Part 2: Ceramic balls ISO 3291:2016 Extra-long Morse taper shank twist drills ISO 3292:2016 Extra-long parallel shank twist drills ISO 3293:2016 Morse taper shank countersinks for angles 60 degrees, 90 degrees and 120 degrees inclusive ISO 3294:2016 Parallel shank countersinks for angles 60, 90 and 120 degrees inclusive ISO 3295:1975 Narrow bandsaw blades for woodworking — Dimensions ISO 3296:1975 Textile machinery and accessories — Tubes for ring-spinning, doubling and twisting spindles, taper 1:64 [Withdrawn: replaced with ISO 368] ISO 3297:2020 Information and documentation – International standard serial number (ISSN) ISO 3298:1994 Photography — Processing chemicals — Specifications for glacial acetic acid ISO 3299:1994 Photography — Processing chemicals — Specifications for 1-phenyl-3-pyrazolidinone
Mass spectrometry (MS) represents one of the main technologies for quantitative proteomics with advantages and disadvantages. Quantitative MS has higher sensitivity but can provide only limited information about the intact protein. Quantitative MS has been used for both discovery and targeted proteomic analysis to understand global proteomic dynamics in populations of cells (bulk analysis) or in individual cells (single-cell analysis). Early approaches developed in the 1990s applied isotope-coded affinity tags (ICAT), which uses two reagents with heavy and light isotopes, respectively, and a biotin affinity tag to modify cysteine containing peptides. This technology has been used to label whole Saccharomyces cerevisiae cells, and, in conjunction with mass spectrometry, helped lay the foundation of quantitative proteomics. This approach has been superseded by isobaric mass tags, which are also used for single-cell protein analysis.
Sources: en.wikipedia.org
=== Ryan York === Ryan York (Matt Lauria) is a young soldier who develops a relationship with Amber. In early season four Ryan meets Zeek at a VA support group and they eventually become good friends. Later, Ryan meets Amber, Zeek's granddaughter, and the two strike up a friendship. The two are instantly attracted to each other, which the rest of the Braverman family notices. Eventually, Amber and Ryan begin dating and are happy. Amber notices that he can be a little violent and impulsive, but she ignores those who say that Ryan is troubled from his time in war. However, near the end of Season 4, Ryan is called back to his base, and he and Amber say goodbye. In the Season 5 premiere, Ryan comes home to Amber and upon seeing her, decides to spontaneously propose. She accepts, and the two begin planning their wedding. They reveal the news to Amber's mother, Sarah, who does not like the idea at first but warms up to it gradually. Initially, Ryan suggests that they just get married at a courthouse, but they ultimately decide that they will get married in front of Amber's family by the lake. When Amber and Sarah question why Ryan's family won't be attending the wedding, he lies and says that they won't be able to make it. However, it is later discovered that his relationship with his mother is strained, and his father is dead. After Amber begins working at the Luncheonette with the band, Ashes of Rome, she spends more time there than with Ryan. He feels that she is very distant and not really with him anymore.
==== Labiaplasty by de-epithelialization ==== Labial reduction by de-epithelialization cuts and removes the unwanted tissue and preserves the natural rugosity (wrinkled free-edge) of the labia minora, and preserves the capabilities for tumescence and sensation. Yet, when the patient presents with much labial tissue, a combination procedure of de-epithelialization and clamp-resection is usually more effective for achieving the aesthetic outcome established by the patient and her surgeon. In the case of a woman with labial webbing (redundant folding) between the labia minora and the labia majora, the de-epithelialization labiaplasty includes an additional resection technique – such as the five-flap Z-plasty ("jumping man plasty") – to establish a regular and symmetric shape for the reduced labia minora.
==== United Arab Emirates ==== In October 2018, a Meat & Livestock Australia report said that while the United Arab Emirates's grocery retail sector is highly developed, traditional markets are still prominent throughout the country.
Sources: en.wikipedia.org
It is a 28-amino-acid peptide originally purified from a bovine thymic extract and later produced synthetically. It is studied mainly for its effects on immune cell function.
No. The two peptides share part of a name but differ in length, sequence, and net charge. Literature searches that treat them as one compound return misleading results.
Solid-phase peptide synthesis is the usual route, and recombinant expression has also been described. Both approaches produce material matching the natural sequence.
The lyophilized solid is normally held at 2 to 8 °C in a sealed, light-protected container. Dry storage limits both hydrolysis and microbial growth. Material kept this way remains stable for the shelf life stated by the supplier.