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哪些身体器官在高温下最危险?
哪些身体器官在高温下最危险?
2019 - 08 - 23
2019年8月23日讯 /生物谷BIOON /——2019年6月，欧洲大部分地区遭遇了早期热浪，法国的气温达到了创纪录的46摄氏度(115华氏度)。热浪的特点是在几天几夜持续高温。它们对我们的日常生活有重要的影响--我们感到过热和疲劳。当热浪来袭时，许多政府会启动一项'热行动计划'，建议受影响的人多喝水，避免剧烈运动，保持凉爽。如果不这样做，就有中暑的风险，而中暑有可能危及生命。但是，人体究竟是如何应对如此极端的温度的呢？为什么高温如此危险呢？哪些器官受到影响，什么时候情况会变得更糟？图片来源：http://cn.bing.com保持凉爽人体的核心温度通常在36到38摄氏度之间波动(97到99华氏度)。在这个温度范围内，生化反应可以正常进行，这对细胞和器官的正常功能至关重要。人类的身体也能很好地应对各种可能威胁其核心温度的环境条件。当核心温度偏离正常范围时，身体就会启动生理反应，使温度恢复正常。这种温度调节反应相当于你家的恒温器；一旦内部温度偏离理想温度，加热或冷却系统就会被激活，回到理想温度。在人体中，这个恒温器位于我们大脑的底部，一个叫做下丘脑的区域。位于我们皮肤、肌肉和其他器官的温度传感器提供的信息被分析，必要时，启动生理反应。对温度升高的第一个也是最重要的反应是通过我们身体的皮肤和四肢，如手和脚散热。我们开始产生汗液，汗液会在皮肤上蒸发，在这个过程中散热。这...
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“不限癌种“疗法的挑战和未来发展方向
“不限癌种“疗法的挑战和未来发展方向
2019 - 08 - 09
今日，美国FDA批准罗氏（Roche）公司开发的NTRK，ROS1和ALK抑制剂Rozlytrek（entrectinib）上市，治疗携带NTRK基因融合的实体瘤患者，以及携带ROS1基因突变的非小细胞肺癌患者。这也是美国FDA批准的第三款“不限癌种”的抗癌疗法。自从去年Loxo Oncology/拜耳（Bayer）公司联合开发的TRK抑制剂Vitrakvi（larotrectinib）获批以来。“不限癌种”抗癌疗法得到了广大业界人士和患者的关注。还有哪些“不限癌种“疗法即将问世？“不限癌种“的抗癌疗法发展的前景如何？今天的这篇文章里，药明康德内容团队将结合公开资料，与读者分享这些问题的答案。“不限癌种“疗法的理论基础和面对的挑战我们知道，基因突变是驱动正常细胞癌变的关键。近年来高通量测序技术的进步，让我们获得了许多对癌症背后的分子生物学机理的洞见。基于这些洞见，我们对癌症的分类不再局限于癌症起源的组织，而是基于肿瘤细胞携带的特定基因变异。这一基于分子生物学生物标志物的分类方法加快了靶向疗法的开发，而“不限癌种“的抗癌疗法可以说是靶向疗法中比较特别的一个分支。这些靶向疗法的靶点在起源于不同组织的多种癌症中存在，而且”不限癌种“疗法能够在多种癌症类型中表现出卓越的疗效。例如去年获批的Vitrakvi在携带NTRK基因融合的患者中能够达到81%的总缓解率。而刚刚获得FDA批准的Rozl...
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干细胞治疗致盲性眼病有了新希望
干细胞治疗致盲性眼病有了新希望
2019 - 08 - 01
第二看台老年性黄斑变性（AMD）、视网膜色素变性（RP）等视网膜变性疾病是目前尚无有效治疗手段的凶险致盲性眼病，也是公认的 “视力杀手”。由中南大学爱尔眼科学院院长唐仕波教授、爱尔眼科研究所副所长陈建苏教授带领团队，利用诱导多能干细胞（iPS）条件培养基和飞秒角膜透镜，联合构建高活性视网膜色素上皮细胞（RPE）的研究，不但有利于对视网膜色素上皮细胞生理特性、药物筛选等研究，还有利于构建组织工程视网膜层及其移植。这将帮助科学家开发出应用组织工程 RPE 细胞片治疗视网膜变性疾病和光感受器病变的新方法。培养高活性的视网膜细胞与年龄相关的老年性黄斑变性是发达国家 50 岁以上人群视力损害和致盲的首要病因，多达 90% 的病人无法治愈。数据显示，发达国家年龄 50 岁以上黄斑变性的发病率达 11%，目前我国的发病率接近发达国家，患病人数超过 3000 万人，并以每年 30 万人次的速度增加，成为我国现阶段 50 岁以上年龄群体发病率最高的三大眼科疾病之一，而且女性呈现出比男性更高的危险性。研究发现，未来最有希望治疗老年性黄斑变性的方式是视网膜色素上皮细胞疗法、视网膜黄斑部分的移植。那么，要采用 RPE 疗法，就需要先培养健康的视网膜细胞。陈建苏告诉科技日报记者，取出死亡时间在 3 小时内捐献者的带有部分脉络膜的视网膜组织，在解剖显微镜下可将带有部分脉络膜的 RPE 层从捐赠组织中分离出来，...
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Attune™ NxT Acoustic Focusing Cytometer, blue/red/violet
产品名称： Attune™ NxT Acoustic Focusing Cytometer, blue/red/violet
型号：
时间： 2019 - 04 - 17
描述The 2018 Attune NxT Acoustic Focusing Cytometer has expanded functionalities to drive your research forward. Designed and developed to remove common barriers associated with flow cytometry, the evolutionary capabilities of the Attune NxT flow cytometer offer adaptable optical configuration options so you can get the most out of your multicolor analysis.• Free Attune NxT software with researcher-inspired upgrades• New green laser option for expanded utility and fluorochrome options• Simple push...
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Attune™ NxT Acoustic Focusing Cytometer, blue/red/violet/yellow
产品名称： Attune™ NxT Acoustic Focusing Cytometer, blue/red/violet/yellow
型号：
时间： 2019 - 04 - 17
描述The 2018 Attune NxT Acoustic Focusing Cytometer has expanded functionalities to drive your research forward. Designed and developed to remove common barriers associated with flow cytometry, the evolutionary capabilities of the Attune NxT flow cytometer offer adaptable optical configuration options so you can get the most out of your multicolor analysis.• Free Attune NxT software with researcher-inspired upgrades• New green laser option for expanded utility and fluorochrome options• Simple push...
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7-AAD (7-Aminoactinomycin D)
产品名称： 7-AAD (7-Aminoactinomycin D)
型号：
时间： 2019 - 04 - 17
描述7-aminoactinomycin D (7-AAD) is a fluorescent intercalator that undergoes a spectral shift upon association with DNA. 7-AAD/DNA complexes can be excited by the 488 nm laser and has an emission maxima of 647 nm, making this nucleic acid stain useful for multicolor fluorescence microscopy and flow cytometry. 7-AAD appears to be generally excluded from live cells, but can be used with cells that have been fixed and permeabilized. 7-AAD has been used for cell cycle analysis by flow cytometry....
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Dynabeads™ CD45
产品名称： Dynabeads™ CD45
型号：
时间： 2019 - 04 - 17
DescriptionDynabeads® CD45 are superparamagnetic beads covalently coupled to anti-human CD45 antibody that enable isolation or depletion of CD45+ leucocytes directly from whole blood, buffy coat, or MNC suspensions. Dynabeads® CD45 can also be used to enrich epithelial tumor cells. The CD45 antigen is weakly expressed on myeloid cells. To efficiently deplete or isolate all leucocytes including myeloid cells, use Dynabeads® CD15 (Cat. No. 11137D) in combination with Dynabeads®...
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EVOS™ 50X Oil Objective, achromat, coverslip-corrected
产品名称： EVOS™ 50X Oil Objective, achromat, coverslip-corrected
型号：
时间： 2019 - 04 - 15
描述This achromat objective is ideal for general applications. This is a coverslip-corrected objective that is optimized for imaging through #1.5 coverslips. All EVOS® objectives offer outstanding optical performance from visible light to near infrared light. The extensive choice of objectives satisfies needs across the spectrum of magnifications and optical specifications.Additional characteristics of this EVOS® objective:• Magnification: 50X• Numerical Aperture: 0.95• Working Distance:...
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EVOS™ M7000 Imaging System
产品名称： EVOS™ M7000 Imaging System
型号：
时间： 2019 - 04 - 15
描述The EVOS M7000 Imaging System is a high-performance, fully automated, inverted, multi-channel fluorescence and transmitted light imaging system. It was developed to meet today’s expectations for image quality, user interface interactions, data generation speed and flexibility, and end-user value. The powerful and time-saving acquisition tools with enhanced autofocus algorithms and automated routines for microwell plate assays, time-lapse live cell imaging, area scanning in time lapse and Z-sta...
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EVOS™ FL Imaging System
产品名称： EVOS™ FL Imaging System
型号：
时间： 2019 - 04 - 15
描述The EVOS® FL Imaging System is a fully integrated, digital, inverted imaging system for four-color fluorescence and transmitted-light applications. It is powerful, yet easy-to-use and delivers high-definition images with exceptional convenience. The unique light cubes, sensitive camera, and precision-engineered optical system make the EVOS® FL system ideal for both demanding and routine fluorescence imaging applications.The EVOS® FL Imaging System offers you these important ad...
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EVOS™ Onstage Master Plate
产品名称： EVOS™ Onstage Master Plate
型号：
时间： 2019 - 04 - 15
描述The EVOS® Onstage Master Plate is part of the EVOS® Onstage Incubator and holds the EVOS® Onstage Vessel Holder. The EVOS® Onstage Incubator is an environmental chamber designed specifically for use with the EVOS® FL Auto Imaging System. This master plate plus vessel holder design, with vessel holders available that accommodate various types of cell culture vessels, provides flexibility in your approach to extended time-lapse imaging experiments under precisely co...
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EVOS™ Onstage Vessel Holder, two 25-mL flasks
产品名称： EVOS™ Onstage Vessel Holder, two 25-mL flasks
型号：
时间： 2019 - 04 - 15
描述EVOS® Onstage vessel holders maximize your choice of cell culture vessels when conducting time-lapse imaging experiments using the EVOS® FL Auto Imaging System equipped with an EVOS® Onstage Incubator. EVOS® Onstage vessel holders allow a perfect fit of your micro-well plates or cell culture flasks/dishes to the master plate of the EVOS® Onstage Incubator for increased precision in sample alignment. This particular vessel holder accommodates two 25-mL T-flasks. With ...
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EVOS™ Onstage Vessel Holder, multi-well plates
产品名称： EVOS™ Onstage Vessel Holder, multi-well plates
型号：
时间： 2019 - 04 - 15
描述EVOS® Onstage vessel holders maximize your choice of cell culture vessels when conducting time-lapse imaging experiments using the EVOS® FL Auto Imaging System equipped with an EVOS® Onstage Incubator. EVOS® Onstage vessel holders allow a perfect fit of your micro-well plates or cell culture flasks/dishes to the master plate of the EVOS® Onstage Incubator for increased precision in sample alignment. This particular vessel holder accommodates multi-well plates (dimensi...
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EVOS™ Vessel Holder for Automated Stage, two 25 x 75 mm slides
产品名称： EVOS™ Vessel Holder for Automated Stage, two 25 x 75 mm slides
型号：
时间： 2019 - 04 - 15
描述EVOS® vessel holders allow a perfect fit of your microscope slide, cell culture flask or dish, or micro-well plate to the stage of the EVOS® imaging systems for increased precision in sample alignment. This particular vessel holder securely holds two 25 x 75 mm standard or chamber microscope slides and is specific for the automated stage of the EVOS® FL Auto Imaging System. It is just one of many easy-to-change vessel holders and stage plates available for this instrument plat...
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EVOS™Vessel Holder, Greiner/BD T-25 flask
产品名称： EVOS™Vessel Holder, Greiner/BD T-25 flask
型号：
时间： 2019 - 04 - 15
描述EVOS® vessel holders allow a perfect fit of your microscope slide, cell culture flask or dish, or micro-well plate to the stage of the EVOS® imaging systems for increased precision in sample alignment. This particular vessel holder accommodates one Greiner/BD T-25 flask. It is just one of many easy-to-change vessel holders and stage plates available for this instrument platform. With a snug and secure fit, yet readily switched, these accessories make imaging samples in a range of ...
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