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Chromogenic technique is among the three techniques which also contain gel-clot technique and turbidimetric technique to detect or quantify endotoxins from Gram-negative bacteria by using amoebocyte lysate extracted from the blue blood of horseshoe crab (Limulus polyphemus or Tachypleus tridentatus). It could be classified as an  endpoint-chromogenic assay  or a  kinetic-chromogenic assay  based on the particular assay principle employed. The reaction principle is that: the amebocyte lysate contains a cascade of serine protease enzymes (proenzymes) which can be activated by bacterial endotoxins. Endotoxins activate the proenzymes to produce activated enzymes (termed coagulase), the latter catalyzes the split of the colorless substrate, releasing a yellow-colored product pNA. The released pNA can be measured photometrically at 405nm. And the absorbance is positively correlated with the endotoxin concentration, then the endotoxin concentration could be quantified ...

Thermal analysis is an analytical method to study the relationship between physical and chemical changes and temperature of materials. This article summarizes application of thermal analysis technology in research field of traditional Chinese medicine. 1. Classification of Methods of Thermal Analysis Technology There are various types of thermal analysis methods, among which differential thermal analysis (DTA), thermogravimetry (TG) and differential scanning calorimetry (DSC) are the most widely used in study of traditional Chinese medicine, and selection of thermal analysis samples pan is relatively stable. 1.1 Differential Thermal Analysis (DTA) The method of measuring the temperature difference between the test object and the reference object is called Differential Thermal Analysis (DTA). 1.2 Differential Scanning Calorimetry (DSC) DSC is heating up the sample and reference material, and measuring their difference of heat absorbed or released during the h...

Kinetic Turbidimetric TAL Reagent Vials 1. Product introduction The kinetic LAL assay  a simple measurement for endotoxin quantification. Based on the principle that in the presence of endotoxin LAL becomes turbid, the increase rate of turbidity is proportional to the endotoxin concentration of the sample, the endotoxin is quantified.  We supply  kinetic turbidimetric LAL lysate  for pharmaceutical and medical device industries for testing the endotoxin level of the injectable drugs and implantable medical devices at China.   1.The detection limit for the assay kit is 0.005EU/ml and the detection range is up to four orders of magnitude. Using kinetic microplate reader Elx808IULALXH and TALgent software,  kinetic turbidimetric assay automatic quantify endotoxins in a single step for 96 tests at a time.  2.The test efficiency could be improved dramatically with the help of multi-channel pipettor or automatic sample proc...

Potassium chlorate    is a compound containing potassium, chlorine and oxygen atoms,other named Potassium chlorate .In its pure form, it is a white crystalline substance. It is the most common chlorate in industrial use. It is used as an oxidizing agent, to prepare oxygen, as a disinfectant, in safety matches, in explosives and fireworks, in cultivation, forcing the blossoming stage of the Longan tree, causing it to produce fruit in warmer climates. Molecular Formula: KClO 3 Appearance: White Powder Usage Mainly in matches,fireworks etc.  Potassium Chlorate% 99.7 Moisture% 0.05 Water Insoluble Matter(max)% 0.03 Chloride(as Cl)% 0.02 Bromate(as KBrO 3 )% 0.03 Sulphate%(as SO 4 ) 0.01 Fe% 0.003 Sieved Mater%(120 mesh) 0.5   JubaoChem Potassium Chlorate  usually packed in 25kg woven bag,...

Natural Balance Blood Sugar Regulating Tea Know your tea Tea tape Herbal essential tea Ingredients Goji,Corn silk,Hawthorn,Peach seed,Chinese yam Preparation  Instructions Description Natural Balance Blood Sugar Regulating Tea - Help to balance the blood sugar and lower the risks of diabetes. As well as an aid to ease high blood sugar symptoms caused by diabetes. ※Not recommended for pregnant women  Tasting notes Flavor Pack  We insist on “no additive and more health”, so what you can taste is the original flavors of all the materials in the tea. We also prepared Flavor Packs in each set.  Those natural extracts of Passion Fruit/ Cranberry / Rowan-berry / Black Tea / Acai Berry would add more fun to your tea and help to fit your taste better. You can also use the flavor packs alone as instant natural drinks. RELATED TAGS :   Blood Sugar Regulating Tea   Ovary Regulating ...

Specification of Vanadium nitride particle: Part No. Particle Purity (% ) SSA (m2/g) Bulk density (g/cm3) Density (g/cm3) Crystal Color NP2307-10um 1-10m 99 30.2 1.29 cubic grey black Note: We can supply different size products of Vanadium nitride particle according to client's requirements. Vanadium nitride particle is a common nitride in nitriding steel. It has two crystal structures: one is V3N, hexagonal crystal structure, the hardness is extremely high, the microhardness is about 1900HV, the melting point is unmeasurable; the second is VN, face-centered cubic Crystal structure, microhardness is about 1520HV, melting point is 2360 degrees. They all have high wear resistance. Vanadium steel can greatly improve the wear resistance of steel after nitriding treatment. Application of  Vanadium nitride particle : Vanadium nitride is a superior steelmaking additive than high vanadium iron. With vanadium nitride as an additive, ...

99.9% Purity Pmk 16648-44-5 Product Origin: China Item NO.: 16648-44-5 Shipping Port: Shang Hai, Shenzhen Of China Color: Light Yellow To White Powder Lead Time: 1-2days Payment: TT, WU, MG ,BTC 99.9% purity pmk  CAS:16648-44-5  bmk  CAS NO.:16648-44-5 MF: C11H12O3 Purity: 99.5%min Conversion rate: 65%-70% Appearance: White or yellow powder Storagr: Keep in a cool and dry place Packaging:1Kg/bag/, 25kg/Drum Usage: Use for parmaceutical intermediates or chemical research Product name Benzeneacetic acid, a-acetyl-, methyl ester (BMK intermediate) CAS 16648-44-5 BMK yield > 70% Compound purity 99% Appearance powder Application For lab research Storage Keep in cool and dry place Package 25kg/drum Place of origin Shanghai Type of shipping EMS, TNT, FEDEX, DHL, UPS Payment terms T/T or Western Union or Money Gram or Bitcoin Delivery time Within 1-3 days MOQ 1kg Production capacity 500kg/month It's a perfect replacement of ...

From Universaldrugslab provide 4-Hydroxy-5-methoxydimethyltryptamine, also known as 4-HO-5-MeO-DMT or psilomethoxin High quality;safe shipping and best quality. Can be customized to any drug. 2433-31-0 4-Hydroxy-5-methoxydimethyltryptamine, also known as 4-HO-5-MeO-DMT or psilomethoxin, is a novel psychedelic drug. It is the 4-hydroxy counterpart of 5-MeO-DMT, or the 5-methoxy counterpart of psilocin. Dosage:20-30MG Packing:20g;100g;500g;1kg Note:The product is only used for chemical experiments.we do not assume any responsibility if used for other purposes. Note：Please contact us if you do not find the product you need，you know have some products that we can't show here, And we have chemists who can help you synthesize whatever you want. Enjoy your shopping! RELATED TAGS :  4-Hydroxy-5-methoxydimethyltryptamine   4-HO-5-MeO-DMT   Psilomethoxin

Acetamiprid 10% WP CAS No: 135410-20-7 Application: Insecticide Specification: 10% WP Packaging: 25 kg/Drum Payment: T/T DA product origin: China(Mainland) Appearance: White powder shipping port: Shanghai Lead Time: 5-15 days   Product Name    Acetamiprid   Fuction    Insecticide   CAS No    135410-20-7   MF    C10H11ClN4    Content,%     ≥ 10.0 Acetamiprid is a new insecticide. Besides contact,stomach poisoning,it has strong osmotic and systemic action.It has a quick result to the insects and a long effective period of 20 day.It has low toxicity to man,cattle and little influence to the natural enemy of the insects,fish and bee.With the special active mechanism,it can kill those insects which has resistance to organophosphorus and insecticides. It can be used on vegetables, melon plants,fruit trees,wheat,tobacco,murpy,tea,cotton,ect to control...