23-α-L-阿糖呋喃-木三糖(A2XX) 23-α-L-Arabinofuranosyl-xylotriose (A2XX) 货号:O-A2XX Megazyme中文站

23-α-L-阿糖呋喃-木三糖(A2XX)

英文名:23-α-L-Arabinofuranosyl-xylotriose (A2XX)

货号:O-A2XX

规格:30 mg

CAS: 152842-73-4
Molecular Formula: C20H34O17
Molecular Weight: 546.5
Purity: > 95%

High purity 23-α-L-Arabinofuranosyl-xylotriose for or use in research, biochemical enzyme assays and in vitro diagnostic analysis. It can be used as an analytical standard or as a substrate to help characterise the activities of arabinoxylan degrading enzymes including endo-xylanase, β-xylosidase and α-L-arabinofuranosidase. This compound was prepared by the controlled enzymatic hydrolysis of wheat arabinoxylan. 

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2,4,6-三苄氧基-1,3,5-三嗪


产品编号 产品名称 产品规格 产品等级 产品价格
385-02182 TriBOT [2,4,6-tris(benzyloxy)-1,3,5-triazine]
2,4,6-三苄氧基-1,3,5-三嗪
25g
387-02181 TriBOT [2,4,6-tris(benzyloxy)-1,3,5-triazine]
2,4,6-三苄氧基-1,3,5-三嗪
100g

TriBOT 2,4,6-tris(benzyloxy)-1,3,5-triazine



2,4,6-三苄氧基-1,3,5-三嗪



特点


  在室温下只需混合即能简单反应
  不会催泪,容易使用

  官能团耐受性好,高收率

  3个苄基同时参与反应

 


反应例


2,4,6-三苄氧基-1,3,5-三嗪

  1~3, 5~7:引自Org.  Lett., 14 (19), 5026–5029 (2012).
  4:Nard Chemicals,Ltd讨论结果

[1]Kunishima, M. et al.: Org. Lett., 14, 5026 (2012).

日本 CLEA Japan 普通饲料General Diets

日本 CLEA Japan 普通饲料General Diets
上海金畔生物代理日本CLEA Japan 公司饲料,欢迎客户访问CLEA Japan 官网或者咨询我们获取更多相关产品信息。

CA-1 (for breeding) CA-1(用于育种)
CE-2 (for rearing and breeding) Ce-2(用于饲养和育种)
CE-7 (for long-term rearing) CE-7(长期饲养)
CL-2 (for germ-free and immunodeficient animals) Cl-2(用于无菌和免疫缺陷动物)
B·F (for weaning) B·F(用于断奶)
Quick Fat (for diabetes and obesity research) 快速脂肪(用于糖尿病和肥胖研究)
High Fat Diet 32 (for diabetes and obesity researc) 高脂饮食32(糖尿病和肥胖研究)
CR-3 (for rearing) CR-3(用于饲养)
CG-7 (for rearing and breeding) CG-7(用于饲养和繁殖)
CD-5M (for breeding and rearing) 镉-5米(用于繁殖和饲养)
CMK-2 (for rearing) CMK-2(用于饲养)
CMS-1M (for breeding and rearing) CMS-1M(用于育种和饲养)
M-16 M-16

For mice, rats, and hamsters   对于老鼠、老鼠和仓鼠
OA-2
CA-1
CE-2
CE-7
CL-2
B・F
For diabetes and obesity studies (for mice and rats)   糖尿病和肥胖研究(老鼠和大鼠)
Quick Fat  快速脂肪
High Fat Diet 32     高脂饮食32
For rabbits and guinea pigs  兔和豚鼠
CR-3
CG-7
For dogs    狗饲料
CD-5M
For monkeys     猴子
CMK-2
CMS-1M
For miniature pigs 小型猪饲料
M-16

菊粉内切(黑曲霉)(重组) endo-Inulinase (Aspergillus niger) (Recombinant) 货号:E-ENDOIAN Megazyme中文站

菊粉内切(黑曲霉)(重组)

英文名:endo-Inulinase (Aspergillus niger) (Recombinant)

货号:E-ENDOIAN

规格:500 Units at 40°C

High purity recombinant endo-Inulinase (Aspergillus niger) for use in research, biochemical enzyme assays and in vitro diagnostic analysis.

EC 3.2.1.7
CAZy Family: GH32
CAS:  9025-67-6

inulinase; 1-beta-D-fructan fructanohydrolase

Recombinant. From Aspergillus niger.
In 3.2 M ammonium sulphate.
Supplied at ~ 200 U/mL. 

Specific activity: ~ 580 U/mg (60oC, pH 4.5 on inulin); ~ 300 U/mg (40oC, pH 4.5 on inulin).

Stability: > 4 years at 4oC.

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APSC品牌代理商

APSC品牌代理商–上海金畔

1. APSC品牌介绍
APSC主要提供有机凝胶色谱标准品(Organic GPC/SEC Standards)和水性凝胶色谱标准品(Aqueous GPC/SEC Standards)两类产品。
GPC(Gel Permeation Chromatography),凝胶渗透色谱,又称为尺寸排阻色谱(Size Exclusion Chromatography,简称SEC),它是基于体积排阻的分离机理,通过具有分子筛性质的固定相,用来分离相对分子质量较小的物质,并且还可以分析分子体积不同、具有相同化学性质的高分子化合物。
GPC是一种特殊的液相色谱,所用仪器与高效液相色谱仪类似,GPC的分离是利用体积排除机理,装填的是多孔性凝胶或微粒,孔径大小与待分离的聚合物分子相似,体积大的高分子化合物不能进入凝胶孔,最先从凝胶粒间流出,淋出体积(时间)最小,高聚物依分子量从大到小依次淋出。这样,通过做已知分子量的高分子聚合物的标准曲线,就能分析同系未知待测高分子化合物了。
2. APSC重点产品
机凝胶色谱标准品(Organic GPC/SEC Standards)和水性凝胶色谱标准品(Aqueous GPC/SEC Standards)两类产品。
3. APSC官网
http://www.ampolymer.com/

4. 金畔生物代理APSC品牌联系方式

上海金畔生物科技有限公司
地 址: 上海市浦东新区东靖路699弄36栋701室
邮 编: 201208
qq:  2743691513
固话总机:021-50837765
订货热线:15221999938
网 址: www.jinpanbio.com
Email:sales@jinpanbio.com

 

木聚糖酶检测试剂盒 Xylanase Assay Kit (Xylazyme AX) 货号:K-XYLS Megazyme中文站

木聚糖酶检测试剂盒

英文名:Xylanase Assay Kit (Xylazyme AX)

货号:K-XYLS

规格:200 assays per kit

The Xylanase (Xylazyme AX) test kit is used for the measurement and analysis of endo-1,4-β-D-xylanase in enzyme preparations, bread improver mixtures and animal feeds. Contains Xylazyme AX Tablets and xylanase enzyme controls (A. niger and Trichoderma longibrachiatum).

Colourimetric method for the determination of Xylanase in feed,
foodstuffs and other materials

Principle:
(β-xylanase)
(1) Xylazyme AX (water insoluble) + H2O → water soluble dyed xylan fragments

Kit size: 200 assays
Method: Based on use of Xylazyme AX tablets (590 nm)
Total assay time: ~ 45 min
Detection limit: 0.02 U/mL of assay solution
Application examples:
Animal feeds, enzyme preparations, bread improver mixtures and
other materials
Method recognition:
Used widely in the feed industry

Advantages

  • Very cost effective
  • All reagents stable for > 2 years during use
  • Only test kit available
  • Simple format
  • Standard included

 

 Q1. Should the pH of the sample be adjusted even for samples in acidic media?

The pH of the assay solution after the sample is added should be the same as that of the assay buffer that is supplied with the kit.
Low sample volumes (e.g. 0.1 mL) are not likely to affect the pH of the assay solution and therefore may not require pH adjustment.
Samples above 0.1 mL are more likely to affect the pH of the assay solution and therefore the pH of these samples should be adjusted as described in the data booklet, prior to addition to the assay.

Q2. There is an issue with the performance of the kit; the results are not as expected.

If you suspect that the Megazyme test kit is not performing as expected such that expected results are not obtained please do the following:

  1. Ensure that you have tested the standard sample that is supplied with the Megazyme test kit.
  2. Send the results of the kit standard, blank samples and the results obtained for your sample, in the relevant MegaCalc spreadsheet (if available) to Megazyme (cs@megazyme.com). Where available the relevant MegaCalc spreadsheet can be downloaded from where the product appears on the Megazyme website.
  3. State the kit lot number being used (this is found on the outside of the kit box).
  4. State which assay format was used (refer to the relevant page in the kit booklet if necessary).
  5. State exact details of any modifications to the standard procedure that is provided by Megazyme.
  6. State the sample type and describe the sample preparation steps if applicable.

动脉粥样硬化饲料 D12108C 12.5kg High fat rodent diet with 1.25% cholesterol

动脉粥样硬化饲料 D12108C 12.5kg High fat rodent diet with 1.25% cholesterol

Research Diets动物疾病造模饲料

Research Diets动物疾病造模饲料代理商

Research Diets, Inc是为世界各地动物模型生物数据采集实验室提供饲料定制,纯化开源饮食和科学仪器的领先制造商。

上海金畔生物生物竭诚为广大科研工作者提供优质的动物造模饲才料,并提供饲料定制服务,可根据您的要求修改饲料配方。

食源性肥胖症饲料

肥胖是一种世界范围内的慢性疾病,是导致高血压、糖尿病、冠心病、心肌梗死等多种慢性病发生的主要危险因。

遗传和环境因素对肥胖症的发生起重要作用,膳食则是影响肥胖症的主要的环境因素之一。膳食诱导的肥胖动物模型普遍被用于肥胖发生机理和治疗方法的研究。

我们与世界顶级动物饲料供应商美国RDI合作,为客户提供配方可报告、可复制、可修改的纯化饲料,我们的饲料具有造模时间短、造模效果好、有效易复制等特点。

动脉粥样硬化饲料
动脉粥样硬化是一种复杂的慢性疾病,其特征为脂质在动脉壁堆积,最终形成版块,从而导致动脉缩小、硬化、以及/或者完全阻塞。

 

研究表明,含饱和脂肪和胆固醇的食物与循环胆固醇水平升高密切相关。

 

跟人类一样,西方膳食可诱导某些啮齿类动物(如小鼠、仓鼠和豚鼠)LDL-C升高和动脉粥样硬化。

 

ApoE敲除或者LDL受体敲除小鼠是诱导动脉粥样硬化的易感小鼠。大鼠很难诱导高胆固醇血症,因为当在膳食中添加胆固醇时,大鼠内源性的胆固醇产生迅速下降。然而,通常采用高脂添加胆固醇的饲料(如D12108C和D12079B)来诱导动脉粥样硬化和胆固醇血症,D12079B比D12108C含有更少的胆固醇,发展成动脉粥样硬化比较缓慢。Veillard等对ApoE敲除小鼠喂养D12108C饲料14周,观察到在第8周时,形成相当严重的病变。

 

推荐饲料:D12079B,D12108C。

 推荐产品  货号  规格  生产厂商
High fat rodent diet with 1.25% cholesterol D12108C 12.5kg 美国RDI
5% Sodium Cholic Acid,12.5% Cholesterol D12336 12.5kg 美国RDI

 

食源性肥胖症饲料

肥胖是一种世界范围内的慢性疾病,是导致高血压、糖尿病、冠心病、心肌梗死等多种慢性病发生的主要危险因。

 

遗传和环境因素对肥胖症的发生起重要作用,膳食则是影响肥胖症的主要的环境因素之一。膳食诱导的肥胖动物模型普遍被用于肥胖发生机理和治疗方法的研究。

 

我们与世界顶级动物饲料供应商美国RDI合作,为客户提供配方可报告、可复制、可修改的纯化饲料,我们的饲料具有造模时间短、造模效果好、有效易复制等特点。

 

重点推荐饲料:D12492和D12451。

 推荐产品  货号  规格  生产厂商
60%Kcal High-Fat(DIO) Diets D12492 12.5kg 美国RDI
45%Kcal High-Fat(DIO) Diets D12451 12.5kg 美国RDI
10%Kcal High-Fat(DIO) 7% Sucrose Control Diets match D12492 D12450J 12.5kg 美国RDI
10%Kcal High-Fat(DIO) 17% Sucrose Control Diets match D12451 D12450H 12.5kg 美国RDI
10%Kcal High-Fat(DIO) 35% Sucrose Control Diets D12450B 12.5kg 美国RDI
10%Kcal High-Fat(DIO) No Sucrose Control Diets D12450K 12.5kg 美国RDI

Beta葡聚糖[混联]检测试剂盒 K-BGLU β-Glucan Assay Kit (Mixed Linkage) 100 assays per kit

Beta葡聚糖[混联]检测试剂盒 K-BGLU β-Glucan Assay Kit (Mixed Linkage) 100 assays per kit
Beta葡聚糖[混联]检测试剂盒
英文名:β-Glucan Assay Kit (Mixed Linkage)
货号:K-BGLU
规格:100 assays per kit

分析物意义: 大麦和燕麦的主要细胞壁多糖

Megazyme检测试剂盒优点:反应迅速、试剂稳定, 只有酶检测试剂盒可用。 AOAC方法 995.16; AACC 方法 32-23

AACC Method 32-23.01, AOAC Method 995.16, EBC Methods 3.11.1, 4.16.1 and 8.11.1, ICC Standard No. 166 and RACI standard method for the measurement of 1,3:1,4-ß-D-glucan in cereal grains, milling fractions, wort and beer. Recommended/Standard procedure of the Association of Official Analytical Chemists (AOAC), American Association of Cereal Chemists (AACC), Royal Australian Chemical Institute (RACI), European Brewing Convention (EBC), and International Association for Cereal Science and Technology (ICC). Content:100 assays per kit

Colourimetric method for the determination of β-Glucan in
cereal grains, feed, foodstuffs, beverages and other materials

Principle:
(lichenase)
(1) β-Glucan + H2O → β-gluco-oligosaccharides

(β-glucosidase)
(2) β-Gluco-oligosaccharides + H2O → D-glucose

(glucose oxidase)
(3) D-Glucose + H2O + O2 → D-gluconate + H2O2

(peroxidase)
(4) 2H2O2 + p-hydroxybenzoic acid + 4-aminoantipyrine →
quinoneimine + 4H2O

Kit size: 100 assays
Method: Spectrophotometric at 510 nm
Total assay time: ~ 100 min
Detection limit: 0.5-100% of sample weight
Application examples:
Oats, barley, malt, wort, beer, food and other materials
Method recognition:
AOAC (Method 995.16), AACC (Method 32-23.01), EBC (Methods
3.10.1, 4.16.1 and 8.13.1), ICC (Standard No. 166), RACI (Standard
Method) and CODEX (Type II Method)

Advantages

  • Very cost effective
  • All reagents stable for > 2 years as supplied
  • Only enzymatic kit available
  • Very specific
  • Simple format
  • Mega-Calc™ software tool is available from our website for hassle-free raw data processing
  • Standard included

Q1. Should the pH of the sample be adjusted even for samples in acidic media?

The pH of the assay solution after the sample is added should be the same as that of the assay buffer that is supplied with the kit.
Low sample volumes (e.g. 0.1 mL) are not likely to affect the pH of the assay solution and therefore may not require pH adjustment.
Samples above 0.1 mL are more likely to affect the pH of the assay solution and therefore the pH of these samples should be adjusted as described in the data booklet, prior to addition to the assay.

Q2. There is an issue with the performance of the kit; the results are not as expected.

If you suspect that the Megazyme test kit is not performing as expected such that expected results are not obtained please do the following:

  1. Ensure that you have tested the standard sample that is supplied with the Megazyme test kit.
  2. Send the results of the kit standard, blank samples and the results obtained for your sample,  in the relevant MegaCalc spreadsheet (if available) to Megazyme (cs@megazyme.com). Where available the relevant MegaCalc spreadsheet can be downloaded from where the product appears on the Megazyme website.
  3. State the kit lot number being used (this is found on the outside of the kit box).
  4. State which assay format was used (refer to the relevant page in the kit booklet if necessary).
  5. State exact details of any modifications to the standard procedure that is provided by Megazyme.
  6. State the sample type and describe the sample preparation steps if applicable.

Q4. I have purchased barley beta-glucan (lot 30108) and carob galactomannan low viscosity (lot 30702) and would like to know what else there might be in these substrates.

Barley beta-glucan lot 30108 would contain about 3-4% arabinoxylan (this was produced in 1993).  Material supplied post 1995 contains < 0.5% arabinoxylan.  Carob galactomannan is quite pure (> 96%).

Q5. Although not specified on the beta-glucan data sheet, is the ratio of 1-3 to 1-4 bonds measured? If so, what is the ratio and would you expect it to remain standardised over a number of different batches?

The content of 1,3 bonds in barley beta-glucan is about 32% (from literature).  We would not expect this to change much (if at all) over different batches.

Q6. Both substrates; barley beta-glucan and wheat arabinoxylan, are standardised to a specific viscosity, e.g. 23-24 cSt. Are the substrates adjusted to give this viscosity?

The substrates are enzymically treated to yield the required viscosity (20 ~ 30 cSt). Modification of the viscosity of beta-glucan is required for IOB viscometric malt beta-glucanase test (which works well).

Q7. We are setting up reducing-sugar assays for both beta-glucanase and xylanase from different fungal origins. Which barley beta-glucan do you recommend for the glucanase assay.

For glucanase assay we recommend the medium viscosity beta-glucan.  We now offer low, medium and high viscosity wheat arabinoxylans, and we think that the low viscosity material will be best (easiest) to use in the reducing-sugar assay.

甲氧基聚乙二醇巯基mPEG-SH

上海金畔生物科技有限公司提供甲氧基聚乙二醇巯基mPEG-SH

甲氧基聚乙二醇巯基CAS号:
mPEG-SH

厂商货号
分子量
(PEG原料)
端基取代率
分散性
(PEG原料之PD)
mPEG-SH-2K
2000±200
≥95%
≤1.05
mPEG-SH-3.4K*
3400±340
≥95%
≤1.05
mPEG-SH-5K
5000±500
≥95%
≤1.05
mPEG-SH-10K
10000±1000
≥90%
≤1.06
mPEG-SH-20K
20000±2000
≥90%
≤1.08
mPEG-SH-30K
30000±3000
≥90%
≤1.08
mPEG-SH-40K*
40000±4000
≥90%
≤1.08

 

 

 

mPEG-Amine 甲氧基聚乙二醇-胺 mPEG-NH2
mPEG-succinimidyl carbonate 甲氧基聚乙二醇-琥珀酰亚胺碳酸酯 mPEG-SC
mPEG-aldehyde 甲氧基聚乙二醇丙醛 mPEG-ALD
mPEG-thiol 甲氧基聚乙二醇巯基 mPEG-SH
mPEG-maleimide 甲氧基聚乙二醇-马来酰亚胺 mPEG-MAL
mPEG-carboxyethyl 甲氧基聚乙二醇丙酸 mPEG-PA
mPEG-amide-carboxyethyl 甲氧基聚乙二醇-酰胺丙酸 mPEG-AS
mPEG-Succinimidyl Propionate 甲氧基聚乙二醇丙酸琥珀酰亚胺酯 mPEG-SPA
mPEG-amide-Succinimidyl Succinate 甲氧基聚乙二醇-酰胺-琥珀酰亚胺-丁二酸酯 mPEG-SSA
mPEG-Succinimidyl Succinate 甲氧基聚乙二醇-琥珀酰亚胺-丁二酸酯 mPEG-SS
mPEG-Succinimidyl Glutarate 甲氧基聚乙二醇-琥珀酰亚胺-戊二酸酯 mPEG-SG

更多产品,更多优惠,请联系我们!
上海金畔生物科技有限公司
固话总机:021-50837765
订货热线:15221999938
qq号:2743691513
网 址: www.jinpanbio.com
金畔博客:www.jinpanbio.cn
Email:sales@jinpanbio.com