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中文名稱： *    
其他中文名稱： 無水*；元明粉；85硝；鹽餅；硬脂鈉    
英文名稱： Sodium sulfate anhydrous    
其他英文名稱： Sodium sulfate exsiccated；Sodium sulfate anhydrous    
產(chǎn)品規(guī)格： AR，99%    
包裝：500克/25公斤   
產(chǎn)品規(guī)格： SP，99%    
包裝：10克    
級別：AR    
含量：≥99.0%    
pH（50g/L，25℃）：5.0～8.0    
澄清度試驗：合格    
鈣：≤0.002%    
鉀：≤0.01%    
化物：≤0.001%    
磷酸鹽：≤0.001%    
水不溶物：≤0.005%    
灼燒失重：≤0.2%    
總氮量：≤0.0005%    
鐵：≤0.0005%    
重金屬：≤0.0005%    
級別：SP    
含量：≥99.0%    
pH（50g/L，25℃）：5.0～8.0    
性狀：顆粒性粉末，無氣味，有苦咸味，無臭，無毒。易在潮濕空氣中吸收三分子水。能溶于水和甘油，不溶于醇。3.6溶于份水。33℃時溶解度Z大(1：2)，溫度再高溶解度降低，100℃時溶于2.4份水。密度：2.7；熔點：880℃；沸點：1700℃。     
用途：生化研究。醫(yī)藥上用作鹽析劑、聚凝劑，也用于造紙、玻璃、印染、合成纖維、制革等工業(yè)。     
保存：RT *儲存條件：
避光、干燥陰涼處封閉貯存,嚴(yán)禁與有毒、有害物品混放、混運。本品為非危險 產(chǎn)品可按一般化學(xué)品運輸,輕搬動輕放,防止日曬、雨淋！受熱、受潮、受光后易喪失活力,保存期短,因此貯存和運輸條件比較苛刻。
運輸：汽車運輸、EMS郵政快遞，申通快遞等， 款到上海3天內(nèi)發(fā)貨；
售后：如您對我們的產(chǎn)品服務(wù)及技術(shù)指標(biāo)有特殊要求，請及時通知我方。
存儲：應(yīng)貯存在干燥清潔避光的環(huán)境中，嚴(yán)禁與有毒物質(zhì)混放，以免污染（保質(zhì)期為兩年）。
*主要優(yōu)級純、分級純和化學(xué)純3種：
（1）優(yōu)級純（GR：Guaranteed reagent），又稱一級品或保證試劑，99.8%，這種試劑純度Z高，雜質(zhì)含量Z低，適合于重要精密的分析工作和科學(xué)研究工作，使用綠色瓶簽。
（2）分析純（AR），又稱二級試劑，純度很高，99.7%，略次于優(yōu)級純，適合于重要分析及一般研究工作，使用紅色瓶簽。
（3）化學(xué)純（CP），又稱三級試劑，≥ 99.5%，純度與分析純相差較大，適用于工礦、學(xué)校一般分析工作。使用藍(lán)色（深藍(lán)色）標(biāo)簽。
（4）實驗試劑（LR：Laboratory reagent），又稱四級試劑。
其他名稱：磷酸二脂酶；磷酸二酯酶
號：9025-82-5
級別：BR
Specific activity：≥20u/mg protein
活力定義：One Unit hydrolyzes one micromole of p-nitrophenyl thymidine-5-phosphate per minute at 25℃, pH 8.9.
產(chǎn)品描述：Venom exonuclease (Phosphodiesterase I) successively hydrolyzes 5'-mononucleotides from 3'-OH-terminated ribo- and deoxyribo-oligonucleotides. The enzyme has an optimal pH range of 9.8-10.4 and a molecular weight of 115 kDa. Phosphodiesterase is inhibited by reducing agents such as glutathione, cysteine and ascorbic acids. It is compley inhibited by 5mM EDTA while ATP, ADP and AMP are partial inhibitors. The enzyme has an absolute requirement for Mg2+
性狀(以下信息僅供參考)：白色或類白色粉末
用途：本品僅供科研，不得用于其它用途。(以下用途僅供參考)用于序列核酸的研究
保存：-20℃
磷酸二酯酶Ⅱ
英文名稱：Phosphodiesterase II from bovine spleen；3′-Exonuclease；Spleen exonuclease；Spleen phosphodiesterase
其他名稱：磷酸二脂酶；磷酸二酯酶
號：9068-54-6
級別：BR
Specific activity：≥1.2u/mg protein
活力定義：One Unit increases the absorbance at 260 nm by 0.200 in 30 minutes at 37℃, pH 6.5, with an RNA substrate
產(chǎn)品描述：Spleen exonuclease (Phosphodiesterase II) excises 3'-phosphomononucleotides from oligonucleotides having a free OH terminus. The optimum pH for the enzyme is 5.5 using succinate and phosphate buffer and pH 6-7 with 0.1 M acetate buffer. The enzyme is assayed using a modification of the Hilmoe (Biochem. Prep., VII, (Meister, A., ed.), John Wiley and Sons, NY, 105, 1961) technique
性狀(以下信息僅供參考)：粉末
用途：本品僅供科研，不得用于其它用途
保存：-20℃
磷脂酶A2
英文名稱：PLA2；Lecithinase A；Phosphatidylcholine 2-acylhydrolase；Phospholipase A2
其他名稱：磷酯酶A2
號：9001-84-7
級別：BR
來源：Crotalus durissus terrificus venom
Specific activity：≥200u/mg
活力定義：One Unit releases one micromole of acid from soybean lecithin per minute at 25℃, pH 8.9
產(chǎn)品描述：Phospholipase A2 is a member of the class of heat-stable, calcium-dependent enzymes catalyzing the hydrolysis of the 2-acyl bond of 3-n-phosphoglycerides. The enzyme has a molecular weight of 30,000 daltons. Phospholipase A2 is activated by Ca2+. It is inhibited by zinc, barium, and manganese ions. Activity values for phospholipase A preparations which are derived from titrimetric assay procedures can be quite dependent on source and type of lecithin, its preparation as a substrate emulsion, other components of the reaction mixture, and the method and instrumentation used
性狀(以下信息僅供參考)：粉末。EC3.1.1.4
用途：本品僅供科研，不得用于其它用途
保存：-20℃
胺氧化酶
英文名稱：PAO；Plasma Amine Oxidase
號：9001-66-5
級別：BR
來源：Bovine Plasma
Specific activity：≥17Tabor units/mg
活力定義：1 international unit oxidizes 1μmole of benzylamine per minute at 25℃, pH 7.2
催化反應(yīng)：
產(chǎn)品描述：Bovine plasma amine oxidase has a molecular weight of 170 kDa and an optimum pH of 6.2 for spermine and 7.2 for spermidine. Amine oxidases are divided into two classes: the pyridoxal and copper containing enzyme to which plasma amine oxidase belongs, and the FAD-containing amino oxidases. Natural substrates include catecholamines, tryptamine derivatives and other physiologically active amines. Plasma amine oxidase is used in research requiring nitrogen group transfers. The molecule is composed of two identical polypeptide chains. There are two pyridoxal phosphates and two atoms of Cu+ per molecule. Bovine plasma amine oxidase is inhibited by copper chelating agents, many carboxyl reagents such as cuprizone, hydroxylamine and cyanide. Benzoic acid and benzyl alcohol are both non-competitive inhibitors (KI = 30 and 34mM respectively). The assay for determination of amine oxidases employed at Worthington is essentially that of Tabor et al., JBC, 208, 645, (1954) with the reaction temperature reduced to 25℃
性狀(以下信息僅供參考)：粉末。EC3.1.1.4
用途：本品僅供科研，不得用于其它用途
保存：-20℃
蛋白酶S
英文名稱：Protease S Aureus；Endoproteinase Glu-C from Staphylococcus aureus V8；V8 Protease
其他名稱：V8蛋白酶S
號：66676-43-5
級別：BR
來源：Staph aureus V8
Activity：≥500units/mg
活力定義：One Unit causes a change of 0.001 A280 nm per minute at 37℃, pH 7.8 using casein as the substrate
產(chǎn)品描述：Protease S. aureus V8 (Endoproteinase-Glu-C) specifically cleaves peptide bonds on the COOH-terminal side of either aspartic or glutamic acids. In the presence of ammonium, the enzyme specificity is limited to glutamic sites. It has a molecular weight of 27,000 daltons and optimum pH's of 4.0 and 7.8 with hemoglobin as the substrate. Protease S. aureus V8 is inhibited by diisopropylfluorophosphate and monovalent anions such as F-, Cl-, CH3COO- and NO3. Enzyme activity is determined by the casein digestion assay described by Drapeau (Methods Enzymol., 45, 469, 1976).
性狀(以下信息僅供參考)：粉末。
用途：本品僅供科研，不得用于其它用途