-
Heppso sodium CAS: 89648-37-3 Tus nqi tsim khoom
N-[2-Hydroxyethyl]piperazine-N'-[2-hydroxypropanesulfonic acid] sodium ntsev yog ib qho tshuaj sib xyaw nrog cov mis C8H19N2NaO4S. Nws yog ib qho sodium ntsev uas tau los ntawm piperazine, uas muaj cov pab pawg ua haujlwm hydroxyethyl thiab hydroxypropanesulfonic acid. Nws feem ntau siv hauv kev lag luam tshuaj ua tus neeg sawv cev buffering thiab stabilizer hauv cov qauv tshuaj. Cov tshuaj no pab tswj cov pH thiab kev ruaj khov ntawm cov tshuaj.
-
P-NITROPHENYL BETA-D-LACTOPYRANOSIDE CAS: 4419-94-7
P-Nitrophenyl beta-D-lactopyranoside, tseem hu ua PNPG, yog ib qho tshuaj uas feem ntau siv rau hauv kev ntsuam xyuas enzymatic los ntsuas qhov kev ua haujlwm ntawm beta-galactosidase, ib qho enzyme koom nrog hauv kev ua haujlwm ntawm cov carbohydrate. PNPG yog ib qho substrate hluavtaws uas tuaj yeem raug txiav los ntawm beta-galactosidase, ua rau muaj kev tso tawm ntawm cov khoom daj. Qhov ntau ntawm cov substrate hydrolysis tuaj yeem ntsuas spectrophotometrically los ntawm kev ntsuas qhov absorbance ntawm cov khoom ntawm ib qho wavelength tshwj xeeb. Qhov no tso cai rau cov kws tshawb fawb los ntsuas qhov kev ua haujlwm thiab kinetics ntawm beta-galactosidase hauv ntau yam xwm txheej, xws li kev kawm txog kev ua haujlwm ntawm enzyme, kev tshuaj ntsuam rau cov enzyme inhibitors lossis activators, lossis kev ntsuas cov teebmeem ntawm kev hloov pauv ntawm kev ua haujlwm ntawm enzyme.
-
Tom ntej: Popso Sesquisodium CAS: 108321-08-0
Piperazine-N,N'-bis(2-hydroxypropanesulfonic acid) sesquisodium ntsev, tseem hu ua PIPES sesquisodium ntsev, yog ib qho tshuaj siv los ua tus neeg sawv cev buffering hauv ntau yam kev siv hauv kev tshawb fawb thiab kev lag luam. Nws pab tswj kom muaj pH ruaj khov hauv cov tshuaj, tshwj xeeb tshaj yog nyob rau hauv qhov ntau ntawm physiological pH. PIPES sesquisodium ntsev feem ntau siv rau hauv cell culture media, protein biochemistry, electrophoresis, molecular biology techniques, thiab cov tshuaj xa mus. Nws ua haujlwm ua tus tswj pH thiab enhancer rau enzyme kev ua haujlwm thiab kev ruaj khov, ua rau nws muaj txiaj ntsig zoo rau ntau yam kev tshawb fawb thiab cov txheej txheem kev lag luam.
-
ACES CAS: 7365-82-4 Tus nqi tsim khoom
N-(2-Acetamido)-2-aminoethanesulfonic acid, tseem hu ua ACES, yog ib qho tshuaj uas siv ntau hauv kev tshawb fawb txog kev tshawb fawb. Nws pab tswj kom muaj pH ruaj khov hauv cov tshuaj thiab yaj tau zoo hauv dej. ACES muaj tshuaj lom tsawg thiab cuam tshuam tsawg kawg nkaus rau cov txheej txheem biochemical, ua rau nws haum rau ntau yam kev siv. Nws feem ntau siv ua ib qho tshuaj buffer hauv kev tshawb fawb txog kev ruaj khov ntawm cov protein thiab kev ntsuam xyuas enzyme, qhov twg nws tswj tau qhov zoo tshaj plaws rau kev ua kom cov protein zoo thiab kev ua haujlwm ntawm enzyme.
-
Phenylgalactoside CAS: 2818-58-8
Phenylgalactoside, tseem hu ua p-nitrophenyl β-D-galactopyranoside (pNPG), yog ib qho khoom siv hluavtaws uas feem ntau siv rau hauv kev sim biochemical thiab molecular biology. Nws feem ntau siv los ntes thiab ntsuas qhov kev ua haujlwm ntawm cov enzyme β-galactosidase.
Thaum phenylgalactoside raug hydrolyzed los ntawm β-galactosidase, nws tso tawm p-nitrophenol, uas yog ib qho tshuaj daj. Kev tso tawm ntawm p-nitrophenol tuaj yeem ntsuas tau ntau yam siv lub spectrophotometer, vim tias qhov absorbance ntawm p-nitrophenol tuaj yeem ntes tau ntawm qhov wavelength ntawm 405 nm.
-
DIPSO CAS: 68399-80-4 Tus nqi tsim khoom
DIPSO sawv cev rau "Diisopropyl azodicarboxylate," uas yog ib qho tshuaj reagent siv ntau hauv cov organic chemistry. Nws feem ntau yog siv rau hauv Mitsunobu reaction, uas yog ib txoj hauv kev rau kev hloov cov cawv mus rau hauv ntau pawg ua haujlwm xws li esters, ethers, lossis amines. DIPSO ua haujlwm ua qhov chaw ntawm cov tshuaj nruab nrab hu ua azodicarboxylate, uas pab txhawb qhov kev hloov pauv no.
-
4-Nitrophenyl-beta-D-glucopyranoside CAS: 2492-87-7
4-Nitrophenyl-beta-D-glucopyranoside yog ib qho substrate uas feem ntau siv rau hauv kev sim biochemical los ntsuas qhov kev ua haujlwm ntawm cov enzymes xws li β-glucuronidase. Cov tshuaj no yog hydrolyzed los ntawm cov enzyme, ua rau muaj kev tso tawm ntawm 4-nitrophenol, uas tuaj yeem ntsuas tau siv spectrophotometry. Nws siv ua rau cov kws tshawb fawb kawm txog ntau yam ntawm kev siv tshuaj, kev lom tshuaj, thiab kev kuaj mob ntsig txog kev ua xua glucuronidation.
-
Tris maleate CAS: 72200-76-1
Tris maleate yog ib yam tshuaj uas ua haujlwm ua tus pH buffer thiab adjuster hauv ntau yam lag luam. Nws yog siv rau kev tswj cov pH kom ruaj khov thiab tiv thaiv kev hloov pauv los ntawm kev ntxiv cov kua qaub lossis cov hauv paus. Tris maleate feem ntau siv rau hauv kev tshawb fawb biochemical, kev ntxuav cov protein, cov txheej txheem kev lag luam, thiab kev tshuaj xyuas chemistry. Nws muaj txiaj ntsig zoo hauv kev buffering ntawm cov pH qis dua thiab paub txog nws qhov kev ua tau zoo hauv kev tswj cov xwm txheej pH zoo tshaj plaws.
-
MOBS CAS:115724-21-5 Tus nqi tsim khoom
4-morpholin-4-ylbutane-1-sulfonic acid, tseem hu ua MOBS, yog ib qho khoom siv organic uas siv los ua tus neeg sawv cev rau kev tshawb fawb txog tsiaj txhu thiab tshuaj lom neeg. Nws ruaj khov thiab tuaj yeem tswj tau pH ruaj khov hauv qhov nruab nrab mus rau me ntsis alkaline. MOBS yog siv dav hauv kev cog qoob loo ntawm tes, kev ntsuam xyuas enzyme, cov txheej txheem molecular biology, thiab electrophoresis. Nws yog sib xws nrog ntau yam reagents thiab paub txog nws qhov ruaj khov thiab tiv taus kev hloov pauv hauv qhov kub thiab pH.
-
1,2,3,4,6-penta-O-acetyl-alpha-D-galactopyranose CAS: 4163-59-1
1,2,3,4,6-penta-O-acetyl-alpha-D-galactopyranose yog ib yam tshuaj uas yog los ntawm tsev neeg ntawm cov carbohydrates. Nws yog ib qho derivative ntawm alpha-D-galactopyranose, ib qho qab zib uas tshwm sim hauv ntuj. Cov tshuaj tshwj xeeb no muaj tsib pawg acetyl txuas nrog cov pab pawg hydroxyl tshwj xeeb ntawm cov suab thaj molecule. Nws feem ntau siv rau hauv ntau yam kev siv tshuaj lom neeg thiab tshuaj, suav nrog ua cov khoom siv pib rau kev tsim cov tshuaj sib xyaw. Nws daim ntawv acetylated txhim kho nws qhov ruaj khov thiab reactivity, ua rau nws yog ib qho khoom siv hauv kev tsim cov organic chemistry.
-
POPSO CAS: 68189-43-5 Tus nqi tsim khoom
POPSO, luv rau Piperazine-N,N'-bis(2-hydroxypropanesulfonic acid) sesquisodium ntsev, yog ib yam khoom siv uas feem ntau siv rau hauv kev tshawb fawb txog kab mob thiab biochemical. Nws pab tswj kom pH ruaj khov hauv cov tshuaj, tshwj xeeb tshaj yog nyob rau hauv qhov ntau ntawm physiological pH. PIPES sesquisodium ntsev yog siv rau hauv kev cog qoob loo ntawm tes, protein biochemistry, electrophoresis, molecular biology techniques, drug delivery systems, thiab ntau ntxiv. Nws lub peev xwm los tswj pH ua rau nws yog ib qho cuab yeej muaj txiaj ntsig zoo rau ntau yam kev tshawb fawb thiab kev siv hauv kev lag luam.
-
BES CAS: 10191-18-1 Tus nqi tsim khoom
N, N-Bis (hydroxyethyl) -2-aminoethanesulfonic acid, tseem hu ua BES lossis N, N-Bis (2-hydroxyethyl) aminoethanesulfonic acid, yog ib qho tshuaj lom neeg uas feem ntau siv los ua tus neeg sawv cev buffering hauv ntau yam kev tshawb fawb thiab kev lag luam.
BES yog ib qho zwitterionic compound, txhais tau tias nws muaj ob qho tib si zoo thiab tsis zoo hauv nws cov qauv. Cov cuab yeej no tso cai rau nws kom tswj tau pH ruaj khov hauv cov tshuaj.
BES muaj tus nqi pKa ntawm kwv yees li 7.4, ua rau nws tshwj xeeb tshaj yog pab tau rau kev buffering ntawm cov pH physiological. Nws feem ntau siv rau hauv kev sim tshuaj lom neeg thiab biochemical, xws li protein purification, enzyme reactions, thiab cell culture, qhov twg tswj hwm pH tshwj xeeb yog qhov tseem ceeb.
Tsis tas li ntawd xwb, BES siv dav hauv cov txheej txheem electrophoresis, vim nws pab tswj cov pH tsim nyog rau kev sib cais thiab kev tshuaj xyuas cov biomolecules uas tau them, xws li cov protein thiab nucleic acids.
