度鲁特韦钠

[size=3][b]有做过孟鲁司特钠的吗[/b][/size]做过的朋友能否告知一下对照品在哪买啊？在网上没找到。进口标准上对照品是孟鲁司特二环己胺盐，另外杂质 “亚砜、酮基甲醇、甲基苯乙烯”具体是什么结构啊？比如说，甲基苯乙烯的甲基在哪个位置啊？

哪位有孟鲁司特钠原料药标准，可否上传分享一下，谢谢。

BI-90Plus 纳米/亚微米激光粒度分析仪用过的朋友给点指教！http://www.bicchina.com/pro/仪器网址[em28]

测定惰性气体中微量水分（露点-70度），哪着种仪器又快又准？

【序号】： 1【作者】：Prakash, O Gihring, TM Dalton, DD, et al. 【题名】： Geobacter daltonii sp. nov., an Fe(III)- and uranium(VI)-reducing bacterium isolated from a shallow subsurface exposed to mixed heavy metal and hydrocarbon contamination 【期刊】： INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY【年、卷、期、起止页码】：卷: 60 页: 546-553 出版年: 2010 【序号】：2 【作者】：Kunapuli, U Jahn, MK Lueders, T, et al. 【题名】：Desulfitobacterium aromaticivorans sp nov and Geobacter toluenoxydans sp nov., iron-reducing bacteria capable of anaerobic degradation of monoaromatic hydrocarbons 【期刊】：INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY 【年、卷、期、起止页码】： 卷: 60 页: 686-695 出版年: 2010 【全文链接】：【序号】： 3【作者】： Slobodkina, GB Kolganova, TV Querellou, J, et al.【题名】： Geoglobus acetivorans sp nov., an iron(III)-reducing archaeon from a deep-sea hydrothermal vent【期刊】：INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY 【年、卷、期、起止页码】： 卷: 59 页: 2880-2883 出版年: 2009 【全文链接】：【序号】：4 【作者】： Slobodkina, GB Kolganova, TV Chernyh, NA, et al【题名】： Deferribacter autotrophicus sp nov., an iron(III)-reducing bacterium from a deep-sea hydrothermal vent【期刊】：INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY 【年、卷、期、起止页码】： 卷: 59 页: 1508-1512 出版年: 2009 【全文链接】：【序号】： 5【作者】：Greene, AC Patel, BKC Yacob, S 【题名】： Geoalkalibacter subterraneus sp nov., an anaerobic Fe(III)- and Mn(IV)-reducing bacterium from a petroleum reservoir, and emended descriptions of the family Desulfuromonadaceae and the genus Geoalkalibacter 【期刊】：INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY 【年、卷、期、起止页码】： 卷: 59 页: 781-785 出版年: 2009【全文链接】：谢谢

最近在做大气中甲苯的测定，采用Tenax管采样测定，但是精密度太差，肿么办，想破了脑袋都不想出啥好办法，求大神指点!

[b]职位名称：[/b]Internal Sales[b]职位描述/要求：[/b]Internal sales engineer will identify the business opportunities for accessories /software/ modules/upgrade items by developing new prospect and interacting with existing customers in order to interest and qualify leads for sales he/she must have a keen understanding of BNS products technology and ability to be the consultant sales to let customer understand the technical solution for specific applications and could communicate the value of BNS products and have the ability to close small value orders to support direct sales.ESSENTIAL FUNCTIONS:Understand and create the needs and expectations of customers and provide the relevant solutionAnalyze, Prospect and build an accessory sales funnel for sales managers via visit, calling, email communication, and other direct marketing method.Consumable parts selling and have ability to close small deal and upgrade.New functions/modules upgrade sellingCustomer database management to constantly update the new contact information of the end users and TB information.Revisit existing customer and gather the sales informationWork with agent for the probes promotion and technical support.Roadshow and Seminar to promote new functionsAct as bridge between marketing and sales on each market activities and work toward the objectivesLeads Nurturing, qualify all sales leads to support sales managerConstantly upgrade Sales force with regular activity reportADDITIONAL RESPONSIBILITIES:Performing other tasks as assigned by sales director ENVIRONMENTAL REQUIREMENTS:30% travel both domestically and internationally on short noticeKNOWLEDGE, SKILLS, AND ABILITIES:Research background and familiar with AFM is betterGood at communication skill and negotiation skillGood at presentation skill and learning capabilityEnglish, office and basic International trade knowledgeGood judgment in selecting methods and techniques for obtaining solutions. Networks with senior internal and external personnel in own area of expertise.Experienced professional with a full understanding of area of specialization resolves a wide range of issues in creative ways. EDUCATIONAL/EXPERIENCE REQUIREMENTS:PhD degree with 3 Years’ AFM related research or technical support job experience3 years AFM experiences in the PhD researchGood at English writing and speakingGood at communication skill[b]公司介绍：[/b] 布鲁克(北京)科技有限公司总部位于美国，是在纳斯达克上市的世界著名的高科技分析仪器跨国企业，以生产质谱仪、核磁共振谱仪、傅立叶红外/拉曼光谱仪，近红外、傅立叶电子顺磁共振波谱仪、原子力显微镜、光学轮廓仪、摩擦磨损测试设备等高水平、高精度分析仪器享誉全球科技界。布鲁克公司创立于 50 多年前，自创立伊始，公司始终秉持一条理念：为每个分析任务提供最佳技术解决方案。如今，公司遍布全球的 6000多名...[url=https://www.instrument.com.cn/job/user/job/position/72449]查看全部[/url]

网上说布鲁斯特角显微镜大多用于空气水界面的单分子层的表征，想问一下，如果将铸膜液涂在玻璃基质上，可否用布鲁斯特角显微镜在线观察其内部微团的形态变化？

布鲁克公司宣布收购 Tornado Spectral Systems Inc. Tornado 在拉曼技术创新和行业应用解决方案方面拥有十多年的经验，其成熟的产品将扩大布鲁克公司的生物制药PAT产品组合。[align=center][img]https://img1.17img.cn/17img/images/202401/uepic/2f58013f-a237-4bba-a341-816e4602ab08.jpg[/img][/align][align=center]Tornado 的专利产品 Process Guardian[sup]?[/sup]，为RAMAN 生物制药工艺应用提供卓越性能[/align]Tornado的专利高通量虚拟狭缝 （HTVS[sup]?[/sup]）技术即使在困难的拉曼分析中也能测量出最高质量的光谱。Tornado的拉曼分析仪产品组合包括 HyperFlux[sup]?[/sup] PRO Plus、Process Guardian[sup]? [/sup]和 SuperFlux[sup]?[/sup]，与传统的过程拉曼光谱仪相比，它们都具有卓越的性能，可以在混合物和低浓度条件下进行更准确的化学鉴定和定量。Tornado分析仪还能更快地测量动态反应，并且激光功率低，即使在危险环境中也能安全操作。Tornado 的产品线还包括坚固耐用的高性能拉曼探头，用于浸泡、流动池、非接触式和大点测量，每种探头都针对不同的应用环境进行了优化。Tornado分析仪可通过光纤开关附件进行多路复用，一台分析仪最多可监测八个不同采样点，多达八个探头。布鲁克光学公司总裁Andreas Kamlowski先生表示：“收购Tornado工艺拉曼技术和产品非常适合扩大我们的生物制药PAT分析仪系列产品，他们拥有宝贵的专业应用知识和多年经验，我们十分欢迎才华横溢的Tornado团队。”Tornado Spectral Systems 首席执行官 Ambrish Jaiswal 先生表示：“Tornado 团队非常荣幸能够加入布鲁克公司。我们相信布鲁克公司能为我们在PAT领域的不断拓展提供理想的环境，我们期待着进一步扩大和增强布鲁克公司的光谱工艺组合。”注：Tornado Spectral Systems 成立于 2013 年，设计、制造和销售基于拉曼光谱的化学分析系统。Tornado的无损实时测量解决方案为既定的分析实践提供了许多优势，并促进了拉曼方法在制药、石化、生物技术和其他应用领域的更广泛应用。Tornado的总部位于加拿大密西沙加，负责包括房屋销售与营销、工程设计、技术支持和运营等。[来源：仪器信息网译] 未经授权不得转载[align=right][/align]

各位大侠 ： 最近已购买Bruker TENSOR 27 FT-IR，但是我们的检测方法参考USP 中 Multiple Internal Reflectance 要求KRS-5晶体为2mm厚，45度，但是我们问了布鲁克的人了，说只有4mm厚，45度的KRS-5晶体。1.不知道厚度有没有影响图谱？ 2.这个和美国药典有冲突，但是问过USP的专家，没有直接回答我们，只是说只要能证明明测试结果是等同的话，就可以。这和没回答我们是一样。不知道各位有没有遇到这样的问题，又改怎样解决~~~

溶出度（Dissolution rate）也称溶出速率，是指在规定的溶剂和条件下，药物从片剂、胶囊剂、颗粒剂等固体制剂中溶出的速度和程度。测定固体制剂溶出度的过程称为溶出度试验（Dissolution test），它是一种模拟口服固体制剂在胃肠道中的崩解和溶出的体外试验方法。药物溶出度检查是评价制剂品质和工艺水平的一种有效手段，可以在一定程度上反映主药的晶型、粒度、处方组成、辅料品种和性质、生产工艺等的差异，也是评价制剂活性成分生物利用度和制剂均匀度 的一种有效标准，能有效区分同一种药物生物利用度的差异，因此是药品质量控制必检项目之一。 一般认为，难溶性 （一般指在水中微溶或不溶） 药物，因制剂处方与生产工艺造成临床疗效不稳定的药物以及治疗量与中毒量相接近的药物（包括易溶性药物），其口服固体制剂质量标准中必须设定溶出度检查项。另外固体制剂的处方筛选及生产工艺流程制订过程中，也需对所开发剂型的溶出度做全面考察。一个可行的溶出度试验法应是在不同时间、地点对同一制剂的溶出度测定或不同的操作者之间的测定都必须达到试验结果具有良好的重现性。为了达到以上目的，必须对溶出度测定试验进行 全面充分的研究。

NanoPlus是一款新型的、具有极宽测试范围的多用途分析仪，它采用光子相关光谱法、电泳光散射以及最新的FST技术来分析纳米粒度仪和zeta电位，并可测定固体以及高浓度悬浮液的zeta电位，符合ISO标准。该仪器采用了高灵敏度测量技术，可同时满足低浓度和高浓度样品纳米粒度与zeta电位分析的要求，浓度范围由0.001%到40%，可检测粒径从0.6nm到10μm，浓度从0.00001%到40%的样品的粒径。该款仪器具有以下技术特点：可测定颗粒在高浓度溶液中的zeta电位可测定固体zeta电位宽粒径范围(0.6nm~10μm)，宽浓度范围(粒径测试：0.00001%~40%可精确测量各种浓度的悬浮液用户友好的软件多种样品池选择可选择一次性样品池结合线性相关器和对数相关器相结合的技术对各种样品进行表征可选择自动滴定装置控制悬浮液pH值再有广告链接，直接删除，扣分，加举报——jackcong

[b]职位名称：[/b]Regional Sales Manager[b]职位描述/要求：[/b]The Sales Engineer will have the sales responsibility for the company’s XRD and SC-XRD sales in his territory. The primary role of the incumbent is to attain sales goals by developing sales, increasing product market share, developing relationships with customers, and maximizing customer satisfaction without sacrificing profitability.Responsibilities: Develops a commercial strategy and annual sales plan for the China market that meets and exceed company sales goals and profitability objectives Provides comprehensive monthly analysis and reporting of regional sales performance Participates in sales negotiations and direct proposal efforts before submission of tenders. Monitors competition by gathering current marketplace information on pricing, products, new products, etc. Seeks out and targets new customers and new sales opportunities, initiates action plan to approach and secure new business for the Company Initiates and coordinates development of market development plans to penetrate new markets Undertakes any other duties as may be assigned by management.Qualification: Doctor’s degree in Physics or Material Sciences 3 years’ technical marketing or field sales experience in the scientific instrument industry. Excellent communication skills in both Chinese and English. Familiar with MS Office, Internet and Outlook. Willing to take extensive travels.[b]公司介绍：[/b] 布鲁克(北京)科技有限公司总部位于美国，是在纳斯达克上市的世界著名的高科技分析仪器跨国企业，以生产质谱仪、核磁共振谱仪、傅立叶红外/拉曼光谱仪，近红外、傅立叶电子顺磁共振波谱仪、原子力显微镜、光学轮廓仪、摩擦磨损测试设备等高水平、高精度分析仪器享誉全球科技界。布鲁克公司创立于 50 多年前，自创立伊始，公司始终秉持一条理念：为每个分析任务提供最佳技术解决方案。如今，公司遍布全球的 6000多名...[url=https://www.instrument.com.cn/job/user/job/position/73447]查看全部[/url]

[font=宋体]【序号】：[/font]1[font=宋体]【作者】：[/font]AMS Costa[font=宋体]【题名】：[/font]Modular Functionalizationof Laminarin to Create Value-Added Naturally Derived Macromolecules[font=宋体]【期刊】：[/font]J. Am. Chem. Soc.[font=宋体]【年、卷、期、起止页码】：[/font]2020, 142, 46,19689–19697 [font=宋体]【全文链接】：[/font]https://doi.org/10.1021/jacs.0c09489

【序号】：1【作者】：Zhi-Bo Jiang, Hong-Li Liu, Xiao-Qing Liu, Ji-Ning Shang, Jia-Rui Zhao & Cheng-Shan Yuan 【题名】：Chemical constituents of Gentiana macrophylla Pall.【期刊】：Natural Product Research: Formerly Natural Product Letters【年、卷、期、起止页码】：2010，Volume 24, Issue 14, pages 1365-1369【全文链接】：http://www.tandfonline.com/doi/abs/10.1080/14786411003745494谢谢各位。

ASTM E111-97Standard Test Method for Young’s Modulus, Tangent Modulus, and Chord Modulus1[img]http://www.instrument.com.cn/bbs/images/affix.gif[/img][url=http://www.instrument.com.cn/bbs/download.asp?ID=135719]ASTM E111-97Standard Test Method for Young＊s Modulus, Tangent Modulus, and Chord Modulus1[/url][img]http://www.instrument.com.cn/bbs/images/affix.gif[/img][url=http://www.instrument.com.cn/bbs/download.asp?ID=135719]ASTM E111-97Standard Test Method for Young’s Modulus, Tangent Modulus, and Chord Modulus1[/url]

哪里有深特露点仪的维修？请联系我～

在经世买这本《禁锢在德黑兰的洛丽塔》已经许久，前不久才开始作为床头读物，塞在三联周刊庞大的信息量中间，让自己的思维即便在冬日也觉得缩在一堆温暖的文字里，感觉很舒适。苏友贞的文笔以前从来没有读过，看了之后有种很熟悉的感觉，就是以前读《沉重的肉身》那种流畅。昨日刚刚读到普鲁斯特因为一个小饼写出了7卷本的巨著，因为一种忆起往昔的触动，引发长篇累牍的描述。让我不禁想起自己中断了不少时间的那个往事杂陈，正如文章中那个年青人说的：普鲁斯特其实就是一blogger。文章中还提到一个词：involutary memory（非自主记忆），因为一道菜，一种气息，一张乍然似昨的影像，打开一封收藏已久的信函，一条语句的音调，一个装束，一弯无意的眼神，或多或少引起的感触和心底波澜，应该就是这个词组涵盖的意境吧。

[font=宋体][back=white]【序号】：[/back][/font][back=white]1[/back][font=宋体][back=white]【作者】：[/back][/font][back=white]Weiwei Zheng[/back][font=宋体][back=white]【题名】：[/back][/font][back=white]Polysaccharidestructure evaluation of Ganoderma lucidum from different regions in China basedon an innovative extraction strategy[/back][font=宋体][back=white]【期刊】：[/back][/font][back=white]CarbohydratePolymers[/back][font=宋体][back=white]【年、卷、期、起止页码】：[/back][/font][back=white]Volume 335, 1July 2024, 122079[/back][font=宋体][back=white]【全文链接】：[/back][/font][back=white]https://doi.org/10.1016/j.carbpol.2024.122079[/back]

ASTM E111-97Standard Test Method for Young’s Modulus, Tangent Modulus, and Chord Modulus1[img]http://www.instrument.com.cn/bbs/images/affix.gif[/img][url=http://www.instrument.com.cn/bbs/download.asp?ID=135905]ASTM E111-97Standard Test Method for Young＊s Modulus, Tangent Modulus, and Chord Modulus1[/url][img]http://www.instrument.com.cn/bbs/images/affix.gif[/img][url=http://www.instrument.com.cn/bbs/download.asp?ID=135905]ASTM E111-97Standard Test Method for Young’s Modulus, Tangent Modulus, and Chord Modulus1[/url]

【序号】：1【题名】：Application of inductively coupled plasma/mass spectrometry for the measurement of chromium, selenium, and molybdenum in infant formula and adult nutritional products: First Action 2011.19.【作者】：Pacquette LH, Szabo A, Thompson JJ.【期刊名、卷名、期号、出版日期】： Journal of AOAC International, 2012 May-Jun;95(3):588-98.【全文链接】：http://www.ncbi.nlm.nih.gov/pubmed/22816248【序号】：2【题名】：Determination of calcium, copper, iron, magnesium, manganese, potassium, phosphorus, sodium, and zinc infortified food products by microwave digestion and inductively coupled plasma-optical emission spectrometry: single-laboratory validation and ring trial.【作者】：Poitevin, Eric【期刊名、卷名、期号、出版日期】： Journal of AOAC International, Volume 95, Number 1, January-February 2012, pp. 177-185(9)【全文链接】：http://www.ncbi.nlm.nih.gov/pubmed/22468357

Abstract: Lucigenin-dependent chemiluminescence together with 2-[4-iodophenyl]-3-[4-nitrophenyl]-5-[2,4-disulfophenyl]-2H tetrazolium monosodium salt (WST-1) reduction can be detected following addition of NADH to many cell types, including human sperm suspensions. Although many reports suggest that such a phenomenon is due to reactive oxygen species production, other oxygen detecting metabolite probes, such as MCLA and luminol, do not produce a chemiluminescent signal in this model system. The enzyme responsible for NADH-dependent lucigenin chemiluminescence was purified and identified as cytochrome-b5 reductase. In support of this concept, COS-7 cells overexpressing cytochrome-b5 reductase displayed at least a 3-fold increase in the previously mentioned activity compared with mock-transfected cells. Fractions containing cytochrome-b5 reductase were capable of inducing both lucigenin-dependent chemiluminescence and WST-1 reduction. Oxygen radicals clearly did not mediate the cytochrome b5-mediated activation of these probes in vitro since neither luminol nor MCLA gave a chemiluminescence response in the presence of the enzyme and the cofactor NADH. These results emphasize the importance of the direct NADH-dependent reduction of these putative superoxide-sensitive probes by cytochrome-b5 reductase even though this enzyme does not, on its own accord, produce reactive oxygen species. Author Keywords: cytochrome-b5 reductase female reproductive tract lucigenin reactive oxygen species sperm sperm capacitation sperm maturation spermatozoa WST-1

【作者】：Dongxiang Fu, Junshan Ma, and Jiabi Chen【题名】：Dual-wavelength microarray fluorescence detection system using volume holographic filter【期刊，年卷期】：Journal of Biomedical Optics -- January/February 2007Volume 12, Issue 1, 014040 (5 pages) 【全文链接】：http://spiedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JBOPFO000012000001014040000001&idtype=cvips&gifs=yesPMID：17343515[em0707]

有谁知道食品添加剂 羧甲基纤维素钠纯度的检测方法呀？为什么我只查到洗涤剂中羧甲基纤维素钠的纯度的检测方法，而在食品添加剂羧甲基纤维素钠钠的标准里，并没有关于纯度的检测项。有谁知道方法或相关标准吗？有的话，麻烦上传或分享一下，万分感谢！！！！！！

求助，SEMI “布鲁斯特角P偏振红外吸收光谱法测量硅中替位碳含量“Test methods for measurement of carbon content of silicon wafers by infrared absorption with P-polarizedradiation incident at the Brewster angleSEMI标准，非常感谢！！

Title: Individual and interactive effects of apigenin analogs on G2/M cell-cycle arrest in human colon carcinoma cell lines Author(s): Wang, WQ VanAlstyne, PC Irons, KA, et al.Source: NUTRITION AND CANCER-AN INTERNATIONAL JOURNAL Volume: 48 Issue: 1 Pages: 106-114 Published: 2004 Title: Quercetin-induced apoptosis in colorectal tumor cells: Possible role of EGF receptor signaling Author(s): Richter, M Ebermann, R Marian, BSource: NUTRITION AND CANCER-AN INTERNATIONAL JOURNAL Volume: 34 Issue: 1 Pages: 88-99 Published: 1999