Megazyme/红淀粉/S-RSTAR/5克
商品编号：
S-RSTAR
品牌：
Megazyme INC
市场价：
¥4104.00
美元价：
2462.40
产品分类：
反应底物
公司分类：
Reaction_substrate
联系Q Q：
3392242852
电话号码：
4000-520-616
电子邮箱：
info@ebiomall.com
商品介绍
Highpuritydyed,solubleRedStarchforthemeasurementofenzymeactivity,forresearch,biochemicalenzymeassaysandinvitrodiagnosticanalysis.
Anexcellentsolublesubstratefortheassayofα-amylaseactivity.
Thesensitivityandspecificityofred-starchpaperforthedetectionofsaliva.
Martin,N.C.,Clayson,N.J.&Scrimger,D.G.(2006).Science&Justice,46(2),97-105.
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Thedetectionofsalivainforensiccaseworkisextremelyimportantinmanytypesofcase.Thisstudydescribesarelativelysensitivemethod,basedonareddyeboundtostarch,forthedetectionofamylase.Thesensitivityandspecificityofthemethodhasbeenexaminedbytestingover50householdproducts,variousbodyfluidsandfivelaboratorychemicals.Thisstudydemonstratedforthefirsttimethatpositiveresultscanbeobtainedfromcertainwashingpowdersaswellasotherhouseholdproducts.Aswellasdetectingamylaseinsaliva,positiveRed-Starchresultswereobtainedfromfaecesandurine.ThemethodwasfoundtobesuitableforthedetectionofmixturesofsalivaandsemeninconjunctionwiththeBrentaminetestforthedetectionofacidphosphatase.
Inhibitionofstarchdigestionbythegreenteapolyphenol,(−)‐epigallocatechin‐3‐gallate.
Forester,S.C.,Gu,Y.&Lambert,J.D.(2012).MolecularNutrition&FoodResearch,56(11),1647-1654.
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Scope:Greenteahasbeenshowntoamelioratesymptomsofmetabolicsyndromeinvivo.Theeffectscouldbedue,inpart,tomodulationofpostprandialbloodglucoselevels.Methodsandresults:WeexaminedtheeffectofcoadmiNISTrationof(−)-epigallocatechin-3-gallate(EGCG,100mg/kg,i.g.)onbloodglucoselevelsfollowingoraladministrationofcommoncornstarch(CCS),maltose,sucrose,orglucosetofastedCF-1mice.WefoundthatcotreatmentwithEGCGsignificantlyreducedpostprandialbloodglucoselevelsafteradministrationofCCScomparedtocontrolmice(50and20%reductioninpeakbloodglucoselevelsandbloodglucoseareaunderthecurve,respectively).EGCGhadnoeffectonpostprandialbloodglucosefollowingadministrationofmaltoseorglucose,suggestingthatEGCGmaymodulateamylase-mediatedstarchdigestion.Invitro,EGCGnoncompetitivelyinhibitedpancreaticamylaseactivityby34%at20μM.Nosignificantchangewasinducedintheexpressionoftwosmallintestinalglucosetransporters(GLUT2andSGLT1).Conclusions:OurresultssuggestthatEGCGacutelyreducespostprandialbloodglucoselevelsinmicewhencoadministeredwithCCSandthismaybedueinparttoinhibitionofα-amylase.TherelativelyloweffectivedoseofEGCGmakesacompellingcaseforstudiesinhumansubjects.
Applicationofbinarypackingforchromatographicseparation.
Mota,M.,Teixeira,J.A.,Yelshin,A.,Dias,R.&Cortez,S.(2005).10thWorldFiltrationCongress,392-396.
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Columnspackedwithcommercialglassbeadsof5and19micronsaveragediameterandbinarymixtureswithfinestfractionof5micron(30%volumefractionofthemixture)wereusedtoanalysestarchbyhydrodynamicchromatography(HDC).Experimentswerecarriedoutat3and15°C.Theobservedresolutionincreasedwiththeapplicationofbinarypackingascomparedwithsingle-sizepacking.Thebestresultswereobtainedatstarch’samylopectinandamyloseseparationwithaglassbeadsmixture(5+19micron)at3°C.Inwhatconcernsamylopectinandamyloseseparation,alowerpressuredropwereobtainedforthemixedbinarypackingwhencomparedwiththepackingcontaininguniform5micronglassbeads.FortheHylonVIIstarchRRTwere0.777and0.964foramylopectin(AP)andamylose(AM),respectively,whilefortheTapiocastarchtheobtainedRRTswere0.799and0.923.Applicationofunboundglassbeadsascolumnpackingmightreduceequipmentandrunningcostsinpreparativescaleseparations.
Sensitivityandspecificityofpresumptivetestsforblood,salivaandsemen.
Vennemann,M.,Scott,G.,Curran,L.,Bittner,F.&Tobe,S.S.(2014).ForensicScience,Medicine,andPathology,10(1),69-75.
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Purpose:Despitetheirwideuse,thelimitsofpresumptivetestscanbepoorlyunderstood.Theaimofthisstudywastoinvestigatethespecificityandsensitivityofconventional,aswellasinnovative,presumptivetestsforblood,semenandsaliva.Methods:WeinvestigatedKastle–Meyer(KM)andleucomalachitegreen(LMG)testsforbloodwithregardtotheirsensitivityandspecificityinthepresenceofoxidizing(hypochlorite)andanti-oxidizing(ascorbicacid)agents.ThesuitABIlityandspecificityoftheredstarchpaper(RSP)testforsalivawasassessed.Finally,theinhibitoryeffectofdetergentontheacidphosphatase(AP)testforsemenwasinvestigatedalongwithpossIBLecrossreactionstoteastains.Results:OurresultsconfirmpreviousfindingsofhighersensitivityandspecificityoftheKMtestcomparedtoLMGtestforblood.Contrarytopreviousstudies,nostatisticallysignificantdifferencewasobservedinthesensitivityofthetestsbetweendryandwetstains.ThenovelRSPtestwasfoundtosuccessfullydetectsaliva.Wedemonstratedthatacidphosphatase(AP)testingforsemenispossibleonusedRSP.AcommonmultipurposedetergenthadaninhibitoryeffectonAPtests.Falsepositiveresultswereobtainedfromteastains.Testingdifferentsortsoftea(black,greenandherbalteas)revealedthatonlyCamelliavarietiesproducepositiveresultwiththeAPtest,duetoAPbeingpresentintheplants.Conclusions:Fromourresultsweconcludethatspecificknowledgeofeachtest,includingsubstancesthatmayaffectthetestoutcome,isimperativetoensurecorrectinterpretationofpresumptivetestresults.
ApuA,amultifunctionalα-glucan-degrADIngenzymeofStreptococcussuis,mediatesadhesiontoporcineepitheliumandmucus.
Ferrando,M.L.,Fuentes,S.,deGreeff,A.,Smith,H.&Wells,J.M.(2010).MicroBIOLOGy,156(9),2818-2828.
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WehaveidentifiedapuAinStreptococcussuis,whichencodesabifunctionalamylopullulanasewithconservedα-(amylaseandpullulanasesubstrate-bindingdomainsandcatalyticmotifs.ApuAexhibitedpropertiestypicalofaGram-positivesurfaceprotein,withaputativesignalsequenceandLPKTGEcell-wall-anchoringmotif.ArecombinantproteincontainingthepredictedN-terminalα-(amylasedomainofApuAwasshowntohaveα-(1,4)glycosidicactivity.Additionally,anapuAmutantofS.suislackedthepullulanaseα-(1,6)glycosidicactivitydetectedinacell-surfaceproteinextractofwild-typeS.suis.ApuAwasrequiredfornormalgrowthincomplexmediumcontainingpullulanasthemajorcarbonsource,suggestingthatthisenzymeplaysaroleinnutrientacquisitioninvivoviathedegradationofglycogenandfood-derivedstarchinthenasopharyngealandoralcavities.ApuAwasshowntopromoteadhesiontoporcineepitheliumandmucusinvitro,highlightingalinkbetweencarbohydrateutilizationandtheabilityofS.suistocolonizeandinfectthehost.
Inhibitionofkeydigestiveenzymesbycocoaextracts1andprocyanidins.
Gu,Y.,Hurst,W.J.,Stuart,D.A.&Lambert,J.D.(2011).JournalofAgriculturalandFoodChemistry,59(10),5305-5311.
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Wedeterminedtheinvitroinhibitoryeffectsofcocoaextractsandprocyanidinsagainstpancreaticα-amylase(PA),pancreaticlipase(PL),andsecretedphospholipaseA2(PLA2)andcharacterizedthekineticsofsuchinhibition.Lavado,regular,andDutch-processedcocoaextractsaswellascocoaprocyanidins(degreeofpolymerization(DP)=2–10)wereexamined.Cocoaextractsandprocyanidinsdose-dependentlyinhibitedPA,PL,andPLA2.Lavadococoaextractwasthemostpotentinhibitor(IC50=8.5–47μg/mL).AninversecorrelationbetweenlogIC50andDP(R2>0.93)wasobserved.Kineticanalysissuggestedthatregularcocoaextract,thepentamer,anddecamerinhibitedPLactivityinamixedmode.ThepentameranddecamernoncompetitivelyinhibitedPLA2activity,whereasregularcocoaextractinhibitedPLA2competitively.Thisstudydemonstratesthatcocoapolyphenolscaninhibitdigestiveenzymesinvitroandmay,inconjunctionwithalow-caloriediet,playaroleinbodyweightmanagement.
Influenceofdevelopment,postharvesthandling,andstorageconditionsonthecarbohydratecomponentsofsweetpotato(IpomeabatatasLam.)roots.
Nabubuya,A.,Namutebi,A.,Byaruhanga,Y.,Narvhus,J.&Wicklund,T.(2017).FoodScience&Nutrition,InPress.
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Changesintotalstarchandreducingsugarcontentinfivesweetpotatovarietieswereinvestigatedweeklyduringrootdevelopmentandfollowingsubjectionoftherootstodifferentpostharvesthandlingandstorageconditions.Freshlyharvested(noncured)rootsandcuredroots(spreadunderthesunfor4daysat29-31°Cand63-65%relativehumidity[RH])wereseparatelystoredatambientconditions(23°C-26°Cand70-80%RH)andinasemiundergroundpit(19-21°Cand90-95%RH).Changesinpastingpropertiesofflourfromsweetpotatorootsduringstoragewereanalyzedat14-dayintervals.Significantvarietaldifferences(p<.05)intotalstarch,sucrose,glucose,maltose,andfructoseconcentrationswereregistered.Thetotalstarchandsucrosecontentoftherootsdidnotchangesignificantly(p<.05)duringrootdevelopment(72.4and7.4%,respectively),whereastheaverageconcentrationsofglucose,maltose,andfructosedecreasedmarkedly(0.46-0.18%,0.55-0.28%,and0.43-0.21%),respectively.Storageledtodecreaseintotalstarchcontent(73-47.7%)andincreaseinsucroseandglucoseconcentrations(8.1-11.2%and0.22-1.57%,respectively).Storagealsoresultedinreductioninsweetpotatoflourpastingviscosities.Curingresultedinincreasedsucroseandglucoseconcentrations(9.1-11.2%and0.45-0.85%,respectively)andmarkedreduction(p<.05)intotalstarchcontent(72.9-47.6%).Thisresultedinlowpastingviscositiescomparedtoflourfromstorageofuncuredroots.Thesefindingsshowthatsignificantchangesoccurinthecarbohydratecomponentsofsweetpotatorootsduringstoragecomparedtodevelopmentandpresentanopportunityfordiverseutilizationoffloursfromsweetpotatorootsinthefoodindustry.
品牌介绍
Megazyme品牌产品简介
来源：作者：人气：2149发表时间：2016-05-19 10:59:00【大 中 小】
Megazyme是一家全球性公司，专注于开发和提供用于饮料、谷物、乳制品、食品、饲料、发酵、生物燃料和葡萄酒产业用的分析试剂、酶和检测试剂盒。Megazyme的许多检测试剂盒产品已经为众多官方科学协会（包括AOAC, AACC , RACI, EBC和ICC等），经过严格的审核，批准认证为官方标准方法，确保以准确、可靠、定量和易于使用的测试方法，满足客户的质量诉求。
Megazyme的主要产品线包括：
◆ 检测试剂盒
◆ 酶
◆ 酶底物
◆ 碳水化合物
◆ 化学品/仪器
官网地址：http://www.megazyme.com
检测试剂盒特色产品：
货号
中文品名
用途
K-ACETAF
乙酸[AF法]检测试剂盒
酶法定量分析乙酸最广泛使用的方法
K-ACHDF
可吸收糖/膳食纤维检测试剂盒
酒精沉淀法测定膳食纤维
K-AMIAR
氨快速检测试剂盒
用于包括葡萄汁、葡萄酒以及其它食品饮料样品中氨含量的快速检测分析。
K-AMYL
直链淀粉/支链淀粉检测试剂盒
谷物淀粉和而粉中直链淀粉/支链淀粉比例和含量检测
K-ARAB
阿拉伯聚糖检测试剂盒
果汁浓缩液中阿拉伯聚糖的检测
K-ASNAM
L-天冬酰胺/L-谷氨酰胺和氨快速检测试剂盒
用于食品工业中丙烯酰胺前体、细胞培养基、以及上清液组分中、L-天冬酰胺，谷氨酰胺和氨的检测分析
K-ASPTM
阿斯巴甜检测试剂盒
专业用于测定饮料和食品中阿斯巴甜含量，操作简单
K-BETA3
β-淀粉酶检测试剂盒
适用于麦芽粉中β-淀粉酶的测定
K-BGLU
混合键β-葡聚糖检测试剂盒
测定谷物、荞麦粉、麦汁、啤酒及其它食品中混合键β-葡聚糖(1,3:1,4-β-D-葡聚糖)的含量
K-CERA
α-淀粉酶检测试剂盒
谷物和发酵液（真菌和细菌）中α-淀粉酶的分析测定
K-CITR
柠檬酸检测试剂盒
快速、可靠地检测食品、饮料和其它物料中柠檬酸（柠檬酸盐）含量
K-DLATE
乳酸快速检测试剂盒
快速、特异性检测饮料、肉类、奶制品和其它食品中L-乳酸和D-乳酸(乳酸盐）含量
K-EBHLG
酵母β-葡聚糖酶检测试剂盒
用于测量和分析酵母中1,3:1,6?-β-葡聚糖，也可以检测1,3-葡聚糖
K-ETSULPH
总亚硫酸检测试剂盒
测定葡萄酒、饮料、食品和其他物料中总亚硫酸含量（按二氧化硫计）的一种简单，高效，可靠的酶法检测方法
K-FRGLMQ
D-果糖/D-葡萄糖[MegaQuant法]检测试剂盒
适用于使用megaquant?色度计（505nm下）测定葡萄、葡萄汁和葡萄酒中D-果糖和D-葡萄糖的含量。
K-FRUC
果聚糖检测试剂盒
含有淀粉、蔗糖和其他糖类的植物提取物和食品中果聚糖的含量测定。
K-FRUGL
D-果糖/D-葡萄糖检测试剂盒
对植物和食品中果糖或葡萄糖含量的酶法紫外分光测定。
K-GALM
半乳甘露聚糖检测试剂盒
食品和植物产品中半乳甘露聚糖的含量检测
K-GLUC
D-葡萄糖[GOPOD]检测试剂盒
谷物提取物中D-葡萄糖的含量测定，可以和其它Megazyme检测试剂盒联合使用。
K-GLUHK
D-葡萄糖[HK]检测试剂盒
植物和食品中D-葡萄糖的含量测定，可以和其它Megazyme检测试剂盒联合使用。
K-GLUM
葡甘聚糖检测试剂盒
植物和食品中葡甘聚糖的含量测定。
K-INTDF
总膳食纤维检测试剂盒
总膳食纤维特定检测和分析
K-LACGAR
乳糖/D-半乳糖快速检测试剂盒
用于快速检测食品和植物产品中乳糖、D-半乳糖和L-阿拉伯糖
K-LACSU
乳糖/蔗糖/D-葡萄糖检测试剂盒
混合面粉和其它物料中蔗糖、乳糖和D-葡萄糖的测定
K-LACTUL
乳果糖检测试剂盒
特异性、快速和灵敏测量奶基样品中乳果糖含量
K-MANGL
D-甘露糖/D-果糖/D-葡萄糖检测试剂盒
适合测定植物产品和多糖酸性水解产物中D-甘露糖含量
K-MASUG
麦芽糖/蔗糖/D-葡萄糖检测试剂盒
在植物和食品中麦芽糖，蔗糖和葡萄糖的含量检测
K-PECID
胶质识别检测试剂盒
食品配料中果胶的鉴别
K-PHYT
植酸(总磷)检测试剂盒
食品和饲料样品植酸/总磷含量测量的简便方法。不需要通过阴离子交换色谱对植酸纯化，适合于大量样本分析
K-PYRUV
丙酮酸检测试剂盒
在啤酒、葡萄酒、果汁、食品和体液中丙酮酸分析
K-RAFGA
棉子糖/D-半乳糖检测试剂盒
快速测量植物材料和食品中棉子糖和半乳糖含量
K-RAFGL
棉子糖/蔗糖/D-半乳糖检测试剂盒
分析种子和种子粉中D-葡萄糖、蔗糖、棉子糖、水苏糖和毛蕊花糖含量。通过将棉子糖、水苏糖和毛蕊花糖酶解D-葡萄糖、D-果糖和半乳糖，从而测定葡萄糖含量来确定
K-SDAM
淀粉损伤检测试剂盒
谷物面粉中淀粉损伤的检测和分析
K-SUCGL
蔗糖/D-葡萄糖检测试剂盒
饮料、果汁、蜂蜜和食品中蔗糖和葡萄糖的分析
K-SUFRG
蔗糖/D-果糖/D-葡萄糖检测试剂盒
适用于植物和食品中蔗糖、D-葡萄糖和D-果糖的测定
K-TDFR
总膳食纤维检测试剂盒
总膳食纤维检测
K-TREH
海藻糖检测试剂盒
快速、可靠地检测食品、饮料和其它物料中海藻糖含量
K-URAMR
尿素/氨快速检测试剂盒
适用于水、饮料、乳制品和食品中尿素和氨的快速测定
K-URONIC
D-葡萄糖醛酸/D-半乳糖醛酸检测试剂盒
简单、可靠、精确测定植物提取物、培养基/上清液以及其它物料中六元糖醛酸含量（D-葡萄糖醛酸和D-半乳糖醛酸）
K-XYLOSE
D-木糖检测试剂盒
简单、可靠、精确测定植物提取物、培养基/上清液以及其它物料中D-木糖含量
K-YBGL
Beta葡聚糖[酵母和蘑菇]检测试剂盒
检测酵母和蘑菇制品中1,3:1,6-beta-葡聚糖和α-葡聚糖含量
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