阿特匹林C


产品编号 产品名称 产品规格 产品等级 产品价格

蜂胶来源的生理活性物质阿特匹林C

阿特匹林C



  本产品是保健食品蜂胶中含有的肉桂酸衍生物之一。据报道阿特匹林C有抗癌、抗炎、抗氧化等的生理活性作用。



◆产品概要


● 外观:白色~类白色,结晶~粉末

● 甲醇的溶解状态:适合实验

● 纯度(HPLC):98.0%以上


阿特匹林C



◆产品列表


产品编号

产品名称

规格

包装

019-26711

Artepillin C
阿特匹林C

生化学用

5mg

脱氧溶剂系列


产品编号 产品名称 产品规格 产品等级 产品价格
047-33045 o-Dichlorobenzene, Deoxidized
1,2-二氯苯,脱氧
500 mL for Organic Synthesis
044-32075 N,N-Dimethylformamide, Deoxidized
N,N-二甲基甲酰胺,脱氧
500 mL for Organic Synthesis
042-32875 Dimethyl Sulfoxide, Deoxidized
二甲亚砜,脱氧
500 mL for Organic Synthesis
054-08705 Ethanol, Deoxidized (99.5)<br> 乙醇,脱氧 500 mL for Organic Synthesis
080-09305 Hexane, Deoxidized
无氧正乙烷
500 mL for Organic Synthesis
135-17515 Methanol, Deoxidized
甲醇,脱氧
500 mL for Organic Synthesis
206-18531 Tetrahydrofuran, Deoxidized, Stabilizer Free
四氢呋喃,脱氧,无稳定剂
500 mL for Organic Synthesis
208-18535 Tetrahydrofuran, Deoxidized, Stabilizer Free
四氢呋喃,脱氧,不含稳定剂
500mL for Organic Synthesis
209-18705 Tetrahydrofuran, Deoxidized, with Stabilizer
四氢呋喃,脱氧,含稳定剂
500 mL for Organic Synthesis
202-18675 Toluene, Deoxidized 500 mL for Organic Synthesis
241-00895 Xylene, Deoxidized 500 mL for Organic Synthesis

脱氧溶剂系列



   溶存氧含量1ppm以下、含水量0.001%(10ppm)以下保证的高品质有机合成用溶剂。 

  适用于厌氧、厌水的有机合成反应。


脱氧溶剂系列

 


规格说明


  【Toluene,  Deoxidized】


规格项目

规格值

含 量

99.5%以上

密度(20℃)

0.864~0.868g/mL

溶存氧

1ppm以下

含水量

0.001%以下

 


产品编号

产品名称

溶存氧

含水量

  规格

047-33045

o-Dichlorobenzene, Deoxidized

1ppm以下

0.001%

500 mL

044-32075

N,N-Dimethylformamide, Deoxidized

500 mL

042-32875

Dimethyl Sulfoxide, Deoxidized

500 mL

054-08705

Ethanol, Deoxidized (99.5)

500 mL

080-09305

Hexane, Deoxidized

500 mL

135-17515

Methanol, Deoxidized

500 mL

206-18531

Tetrahydrofuran, Deoxidized, Stabilizer Free

100 mL

208-18535

500 mL

209-18705

Tetrahydrofuran, Deoxidized, with Stabilizer

500 mL

202-18675

Toluene, Deoxidized

500 mL

241-00895

Xylene, Deoxidized

500 mL

SUPRENO无粉丁晴胶检查手套 美国MicroFlex SU-INT

名称:SUPRENO无粉丁晴胶检查手套

品牌:美国MicroFlex

订货号:SU-INT

SUPRENO无粉丁晴胶检查手套                                                        美国MicroFlex                                                        SU-INT

咨询此产品

产品介绍

 

SUPRENO 无粉丁晴胶检查手套

标准检查手套

柔软和耐用,丁晴组成,弹性强,带用舒适

内部高分子聚合材料涂层,使得手套容易带和脱

100\%丁晴减少可能与乳胶蛋白相关的不利反应

纹路化的手套指尖,方便在湿滑和干燥的条件下的物体抓握

梯度侵染手套各部位,确保各部的最佳保护

达到所有现行的美国FDA和欧洲EN/ISO标准,确保稳定的质量

EN374-2,EN-374-3合格证书

舒适耐用的丁晴胶手套

Supreno是一款柔软舒适的丁晴检查手套,优异的强度和耐用性能。比过去的丁晴手套更舒适,长时间带用不感觉疲劳,强化的触觉敏感和纹路手指尖部能使使用者更好地在湿滑和干燥的条件下感知和抓握物体。

Supreno手套技术参数

手套外形尺寸  长度:245毫米

                       手腕厚度:4.3mils(千分之一英寸)

                       手掌厚度:5.5mils

                       手指厚度:7.9mils

                       破裂力度:最小9

                       弹性/延长性(\%):最小500

                       粉含量:最大2毫克/只手套

手套特性        材料:丁晴胶,非天然乳胶制品

                      类型:非灭菌

                      形状:灵活五指

                     颜色:兰色

                     尺寸:XS,S,M,L,XL

                     袖口:卷边

                     手套内部:高分子聚合材料表面涂层,无粉

                    应用:一次性

                    包装:100只手套/盒,以重量计;10盒/箱

生化学检查试剂|生命科学/临床检验药|关东化学株式会社

临床化学检查是血清,血浆,尿等的体液样品,蛋白质,类脂体,糖,电解质,酵素,金属等的定量进行检查。健康诊断等胆固醇,中性脂肪,GPT,γ- GT,血糖等项目比较在意的人也被在。它们是临床化验含有项目的一部分。 关东化学,各种各样的临床化学检查试剂使用(体外诊断用医薬品)生产销售。

弹出窗口打开

生命科学/临床检验药的咨询

信息查询

电话: 03 – 6214 – 1091

传真: 03 – 3241 – 1049

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日本天野酶制品株式会社-特种酶制品

日本天野酶试剂代理商 日本天野酶试剂官网

日本天野酶制品株式会社上海代表处

日本天野酶制品株式会社-特种酶制品

上海金畔生物科技有限公司是一家销售天野酶制品的中国总代理公司。

日本天野酶代理商 日本Amano酶代理商

日本天野酶制品株式会社  日本天野酶代理商Amano酶代理商

固话总机:021-50837765

订货热线:15221999938

qq号:2743691513 1042640511

微信号:jinpanbio
网 址: www.jinpanbio.com
金畔博客:www.jinpanbio.cn

半乳糖脱氢酶[土壤原核生物] Galactose dehydrogenase (soil prokaryote) 货号:E-GALDH Megazyme中文站

半乳糖脱氢酶[土壤原核生物]

英文名:Galactose dehydrogenase (soil prokaryote)

货号:E-GALDH

规格:200 Units

High purity recombinant Galactose dehydrogenase (soil prokaryote) for use in research, biochemical enzyme assays andin vitro diagnostic analysis.

EC 1.1.1.48

Recombinant from soil procaryote. This recombinant enzyme has been expressed in E. coli and purified by affinity chromatography. Electrophoretically homogeneous (MW 36,659). In 3.2 M ammonium sulphate.

Specific activity: 390 U/mg (25oC, pH 8.6, on galactose).

Stable at 4oC for > 2 years.

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Whatman 硝酸纤维素膜 NC膜(杂交膜) 0.2um 孔径10401396  Protran BA-83  20cmx3m

Whatman 硝酸纤维素膜 NC膜 66485 (杂交膜)Whatman Protran 0.22

Whatman 硝酸纤维素膜 NC膜(杂交膜) 0.2um 孔径10401396  Protran BA-83  20cmx3m

Whatman 硝酸纤维素膜 NC膜(杂交膜)10401196  Protran BA-85   0.45um

Whatman 硝酸纤维素膜 NC膜(杂交膜) 0.2um 10401396  Protran BA-83   0.2um 孔径  20cmx3m

硝酸纤维素膜 NC膜 (杂交膜)Whatman Protran 0.22

订购信息:
货号10401196  Protran BA-85   0.45um孔径  30cmx3m    ¥1950/卷
货号10401396  Protran BA-83   0.2um 孔径  20cmx3m      ¥5150/卷

100%纯硝酸纤维素膜
Protran™硝酸纤维素(NC)膜是世界上使用最为广泛的特异性转移介质。Protran硝酸纤维素膜采用100%纯硝酸纤维素材料制成,保证不含醋酸纤维素材料,确保了最高的结合能力。

其它的硝酸纤维素杂交膜可能含有大量的醋酸纤维素,这会降低蛋白的结合能力。Protran杂交膜采用纯硝酸纤维素制成,具有最好的操作强度,兼容多种检测方法,包括同位素法,化学发光法(以luminol为基础),比色法和荧光法等。
与PVDF膜相比,Protran硝酸纤维素膜在使用中不需要甲醇预湿步骤,这使它可以用于那些需要亲水性环境的蛋白质的转移,在转移之前,膜仅需要在水中简单润湿,然后置于转移缓冲液中,而不再需要其它预湿步骤。
高结合力,低背景
除了具有高结合能力以外,Protran硝酸纤维素膜本身产生的背景非常低,膜特有的表面性质保证了优异的信噪比,而同时却不需要严格的清洗条件。
小分子蛋白的高保留率
Protran硝酸纤维素膜有多种孔径大小可供选择,使不同的应用都可以获得最佳的效果。0.2μm孔径的Protran BA83硝酸纤维素膜通过减少小分子“下漏”来保留分子量小于20KD的蛋白质分子。0.45μm孔径的Protran BA85硝酸纤维素膜是较大分子量样品和常规核酸研究的理想选择。0.1μm孔径的Protran BA79则用于分子量低于7kD的小分子蛋白转移。
Protran硝酸纤维素膜的一个主要优势在于,经实验证明,结合在Protran膜上的蛋白能够保持分子识别活性长达5年。
Protran杂交三明治组合
由1张预切的硝酸纤维素膜和2张3MM层析杂交纸组成的三明治包装,帮您节省更多的时间。这些膜都是用于杂交的质量最好的NC膜——Protran BA83或者BA85。
Protran 硝酸纤维素膜的结合能力为 80~150µg/cm2,可高压灭菌(液体冷循环)

D-甘露糖/D-果糖/D-葡萄糖检测试剂盒 D-Mannose/D-Fructose/D-Glucose Assay kit 货号:K-MANGL Megazyme中文站

D-甘露糖/D-果糖/D-葡萄糖检测试剂盒

英文名:D-Mannose/D-Fructose/D-Glucose Assay kit

货号:K-MANGL

规格:55 assays per kit

The D-Mannose/D-Fructose/D-Glucose test kit is suitable for the specific measurement and analysis of D-mannose, D-fructose and D-glucose in plant products and in acid hydrolysates of polysaccharides.

UV-method for the determination of D-Mannose, D-Fructose
and D-Glucosein foodstuffs, yeast cell preparations and
other materials

Principle:
(hexokinase)
(1) D-Mannose / D-fructose / D-glucose + ATP →
M-6-P / F-6-P / G-6-P + ADP

(glucose-6-phosphate dehydrogenase)
(2) G-6-P + NADP+ → gluconate-6-phosphate + NADPH + H+

(phosphomannose isomerase) (phosphoglucose isomerase)
(3) M-6-P ↔ F-6-P ↔ G-6-P

Kit size: 55 assays
Method: Spectrophotometric at 340 nm
Reaction time: ~ 30 min
Detection limit: 0.7 mg/L
Application examples:
Foodstuffs, yeast cell preparations, enzymatic hydrolysates and other
materials (e.g. biological cultures, samples, etc.)
Method recognition: Novel method

Advantages

  • Very competitive price (cost per test)
  • All reagents stable for > 2 years after preparation
  • Only enzymatic kit available
  • Simple format
  • Rapid reaction
  • Mega-Calc™ software tool is available from our website for hassle-free raw data processing
  • Standard included

 Q1. Sometimes a negative absorbance change is obtained for the blank samples, is this normal? Should the real value (negative absorbance change) or “0” be used in the calculation of results?

Sometimes the addition of the last assay component can cause a small negative absorbance change in the blank samples due to a dilution effect and in such cases it is recommended that the real absorbance values be used in the calculation of results.

Q2. 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.

Q3. 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 ([email protected]). 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. How can I work out how much sample to extract and what dilution of my sample should be used in the kit assay?

Where the amount of analyte in a liquid sample is unknown, it is recommended that a range of sample dilutions are prepared with the aim of obtaining an absorbance change in the assay that is within the linear range.
Where solid samples are analysed, the weight of sample per volume of water used for sample extraction/preparation can be altered to suit, as can the dilution of the extracted sample prior to the addition of the assay, as per liquid samples.

Q5. Can the sensitivity of the kit assay be increased?

For samples with low concentrations of analyte the sample volume used in the kit assay can be increased to increase sensitivity. When doing this the water volume is adjusted to retain the same final assay volume. This is critical for the manual assay format because the assay volume and sample volume are used in the calculation of results.

Q6. I have some doubts about the appearance/quality of a kit component what should be done?

If there are any concerns with any kit components, the first thing to do is to test the standard sample (control sample) that is supplied with the kit and ensure that the expected value (within the accepted variation) is obtained before testing any precious samples. This must be done using the procedure provided in the kit booklet without any modifications to the procedure. If there are still doubts about the results using the standard sample in the kit then send example results in the MegaCalc spread sheet to your product supplier (Megazyme or your local Megazyme distributor).

Q7. How much sample should be used for the clarification/extraction of my sample?

The volume/weight of sample and total volume of the extract can be modified to suit the sample. This will ultimately be dictated by the amount of analyte of interest in the sample and may require empirical determination. For low levels of analyte the sample:extract volume ratio can be increased (i.e. increase the sample and/or decrease the total extraction volume).

Alternatively, for samples with low concentrations of analyte, a larger sample volume can be added to the kit assay. When altering the sample volume adjust the distilled water volume added to the assay accordingly so that the total assay volume is not altered.

Q8. Can the manual assay format be scaled down to a 96-well microplate format?

The majority of the Megazyme test kits are developed to work in cuvettes using the manual assay format, however the assay can be converted for use in a 96-well microplate format. To do this the assay volumes for the manual cuvette format are reduced by 10-fold. The calculation of results for the manual assay format uses a 1 cm path-length, however the path-length in the microplate is not 1 cm and therefore the MegaCalc spreadsheet or the calculation provided in the kit booklet for the manual format cannot be used for the micropalate format unless the microplate reader being used can.

There a 3 main methods for calculation of results using the microplate format:

  1. The easiest method is to use a microplate reader that has a path-length conversion capability (i.e. the microplater reader can detect the path-length of each well and convert the individual readings to a 1 cm path-length). This will allow values to be calculated using the MegaCalc calculation software which can be found where the product is located on the Megazyme website.
  2. Perform a standard curve of the analyte on each microplate that contains test samples and calculate the result of the test samples from the calibration curve (concentration of analyte versus absorbance).
  3. Perform a standard curve of the analyte in both the cuvette format (i.e. with a 1 cm path-length) and the 96-well microplate format and use these results to obtain a mean conversion factor between the cuvette values and the microplate values. Subsequent assays in the microplate format can then be converted from the calculated conversion factor.

Q9. Can the test kit be used to measure biological fluids and what sample preparation method should be used?

The kit assay may work for biological fluids assuming that inositol is present above the limit of detection for the kit after any sample preparation (if required). Centrifugation of the samples and use of the supernatant directly in the kit assay (with appropriate dilution in distilled water) may be sufficient. However, if required a more stringent sample preparation method may be required and examples are provided at the following link:http://www.megazyme.com/docs/analytical-applications-downloads/biological_samples_111109.pdf?sfvrsn=2

The test kit has not been tested using biological fluids as samples because it is not marketed or registered as a medical device. This will therefore require your own validation.

Q10. When using this kit for quantitative analysis what level of accuracy and repeatability can be expected?

The test kit is extremely accurate – at Megazyme the quality control criteria for accuracy and repeatability is to be within 2% of the expected value using pure analytes.

However, the level of accuracy is obviously analyst and sample dependent.

Q11. Must the minimum absorbance change for a sample always be at least 0.1?

No. The 0.1 change of absorbance is only a recommendation. The lowest acceptable change in absorbance can is dictated by the analyst and equipment (i.e. pipettes and spectrophotometer) and therefore can be can be determined by the user. With accurate pipetting, absorbance changes as low as 0.02 can be used accurately.
If a change in absorbance above 0.1 is required but cannot be achieved due to low concentrations of analyte in a sample, this can be overcome by using a larger sample volume in the assay to increase the absorbance change and thereby increase sensitivity of the assay. When doing this the increased volume of the sample should be subtracted from the distilled water volume that is added to the assay so that the total assay volume is unaltered. The increase sample volume should also be accounted for when calculating final results. 

Q12. Can the sensitivity of the kit assay be increased?

Yes. Samples with the lower concentrations of analyte will generate a lower absorbance change. For samples with low concentrations of analyte, a larger sample volume can be used in the assay to increase the absorbance change and thereby increase sensitivity of the assay. When doing this the increased volume of the sample should be subtracted from the distilled water volume that is added to the assay so that the total assay volume is unaltered. The increase sample volume should also be accounted for when calculating final results.

Q13. Must the minimum absorbance change for a sample always be at least 0.1?

No. The 0.1 change of absorbance is only a recommendation. The lowest acceptable change in absorbance can is dictated by the analyst and equipment (i.e. pipettes and spectrophotometer) and therefore can be can be determined by the user. With accurate pipetting, absorbance changes as low as 0.02 can be used accurately.
If a change in absorbance above 0.1 is required but cannot be achieved due to low concentrations of analyte in a sample, this can be overcome by using a larger sample volume in the assay to increase the absorbance change and thereby increase sensitivity of the assay. When doing this the increased volume of the sample should be subtracted from the distilled water volume that is added to the assay so that the total assay volume is unaltered. The increase sample volume should also be accounted for when calculating final results.