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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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EVOS™ Vessel Holder, two 25-cm T-flasks
产品名称： EVOS™ Vessel Holder, two 25-cm T-flasks
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 two 25 cm T-flasks. 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 vessel ...
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EVOS™ Vessel Holder, one 100-mm Petri dish
产品名称： EVOS™ Vessel Holder, one 100-mm Petri dish
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 100 mm Petri dish. 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 vess...
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EVOS™ Vessel Holder, two 60-mm Petri dishes
产品名称： EVOS™ Vessel Holder, two 60-mm Petri dishes
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 two 60 mm Petri dishes. 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 ves...
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EVOS™ Vessel Holder, four 35-mm Petri dishes
产品名称： EVOS™ Vessel Holder, four 35-mm Petri dishes
型号：
时间： 2019 - 04 - 12
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 four 35 mm Petri dishes. 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 ve...
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EVOS™ Vessel Holder, two 25 x 75 mm slides
产品名称： EVOS™ Vessel Holder, two 25 x 75 mm slides
型号：
时间： 2019 - 04 - 12
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 two 25 x 75 mm slides. 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 vess...
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EVOS™ 4X Objective, fluorite, LWD, phase-contrast
产品名称： EVOS™ 4X Objective, fluorite, LWD, phase-contrast
型号：
时间： 2019 - 04 - 12
描述This fluorite objective is ideal for fluorescence and demanding transmitted-light applications. This is a long working distance (LWD) objective that is optimized for the imaging of slides, cell culture dishes and flasks, and microtiter plates. This is also a phase-contrast objective, making it useful for hard-to-see, translucent speciments. All EVOS® objectives offer outstanding optical performance from visible light to near infrared light. The extensive choice of objectives satisfies nee...
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EVOS™ Light Cube, Cy™5
产品名称： EVOS™ Light Cube, Cy™5
型号：
时间： 2019 - 04 - 12
描述All EVOS® fluorescence imaging systems and the Countess® II FL Automated Cell Counter contain our unique, proprietary LED light cubes. This world-leading light engine outputs remarkable intensity over a short light path that delivers superior fluorophore excitation. Each cube contains an LED, condensing optics, and hard-coated filters. EVOS® light cubes are user-changeable and automatically recognized by the system. The Cy®5 light cube is ideal for use with Alexa Fluor&...
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EVOS™ Light Cube, RFP
产品名称： EVOS™ Light Cube, RFP
型号：
时间： 2019 - 04 - 12
描述All EVOS® fluorescence imaging systems and the Countess® II FL Automated Cell Counter contain our unique, proprietary LED light cubes. This world-leading light engine outputs remarkable intensity over a short light path that delivers superior fluorophore excitation. Each cube contains an LED, condensing optics, and hard-coated filters. EVOS® light cubes are user-changeable and automatically recognized by the system. The RFP light cube is ideal for use with Alexa Fluor® ...
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EVOS™ Light Cube, GFP
产品名称： EVOS™ Light Cube, GFP
型号：
时间： 2019 - 04 - 12
描述All EVOS® fluorescence imaging systems and the Countess® II FL Automated Cell Counter contain our unique, proprietary LED light cubes. This world-leading light engine outputs remarkable intensity over a short light path that delivers superior fluorophore excitation. Each cube contains an LED, condensing optics, and hard-coated filters. EVOS® light cubes are user-changeable and automatically recognized by the system. The GFP light cube is ideal for use with Alexa Fluor® ...
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EVOS™ Light Cube, DAPI
产品名称： EVOS™ Light Cube, DAPI
型号：
时间： 2019 - 04 - 12
描述All EVOS® fluorescence imaging systems and the Countess® II FL Automated Cell Counter contain our unique, proprietary LED light cubes. This world-leading light engine outputs remarkable intensity over a short light path that delivers superior fluorophore excitation. Each cube contains an LED, condensing optics, and hard-coated filters. EVOS® light cubes are user-changeable and automatically recognized by the system. The DAPI light cube is ideal for use with Acridine, Alexa F...
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EVOS™ Power Cord, Type I (Australia)
产品名称： EVOS™ Power Cord, Type I (Australia)
型号：
时间： 2019 - 04 - 12
描述This power cord is for use with EVOS® XL, FL , FL Color, and FL Auto systems in countries with Type I power plugs. The Type I electrical plug is mainly used in Australia and New Zealand, but is also used in China and parts of Asia, South America, and Africa.
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EVOS™ 20X Objective, achromat, LWD, phase-contrast
产品名称： EVOS™ 20X Objective, achromat, LWD, phase-contrast
型号：
时间： 2019 - 04 - 11
描述This achromat objective is ideal for general applications. This is a long working distance (LWD) objective that is optimized for the imaging of slides, cell culture dishes and flasks, and microtiter plates. This is also a phase-contrast objective, making it useful for hard-to-see, translucent speciments. 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 magnificati...
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