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科学家警告不应低估微生物在气候变化中的作用
科学家警告不应低估微生物在气候变化中的作用
2019 - 07 - 19
近日，来自 9 个国家的 33 名微生物学家在《自然综述：微生物学》上发文表示，应该进一步将微生物融入主流气候变化研究和气候变化框架中，以应对人为造成的气候变化问题。他们警告说，“提醒人类注意，气候变化的影响将严重依赖微生物的反应，它们对于实现一个环境可持续发展的未来至关重要”。已知人类活动及其对气候和环境的影响关系到动植物灭绝和生物多样性损失，并且危及地球上的动植物生命。微生物也会对温室气体排放产生重要影响。尽管微生物丰富多样，但它们维护生态系统健康的作用，以及如何影响气候变化或被气候变化影响，却鲜为人知。澳大利亚新南威尔士大学的 Ricardo Cavicchioli 等人认为，微生物在气候变化生物学中扮演的核心角色及其全局重要性不应被低估，他们并且呼吁研究人员、机构和政府对微生物加剧或缓解人为气候变化影响的作用进行评估。研究人员在文中探讨了气候变化对微生物作用以及全球海陆生物群落的影响。他们还指出，从农业和传染病的角度出发，需要更深入地理解气候变化对微生物的影响，比如气候变化预计将提高部分人类病原体的抗生素耐药性。相关论文信息：https://doi.org/10.1038/s41579-019-0222-5
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3个妙招保你免疫健康，远离新冠病毒!
3个妙招保你免疫健康，远离新冠病毒!
2020 - 04 - 23
2020年4月20日讯 /生物谷BIOON /——无论是在杂货店擦擦购物车后至少洗手20秒，还是尽可能呆在家里，我们都在适应一种新常态，以限制感染SARS-CoV-2。现在也是关注我们的免疫系统的好时机，如果我们暴露在疾病中，免疫系统会影响我们身体的反应。它受到我们日常习惯的深刻影响。科罗拉多大学博尔德分校生态与进化生物学的杰出教授、该系荣誉项目的联合主任Barbara Demmig-Adams说：'小事情也能带来改变。'Demmig-Adams研究的是植物抗氧化剂，它是我们饮食的重要组成部分，因为人体自身无法产生这些营养物质。她还教授一门关于生活方式医学的本科课程，以便将植物对人类生活的重要性转化为与学生相关的研究。图片来源：https://cn.bing.com通过她自己的研究和教学，Demmig-Adams发现人类免疫系统的力量被现代生活的许多方面削弱了。我们坐得太多，吃能量丰富的食物，缺乏微量营养素，还要应对长期的心理压力和睡眠不足。但是一个人可以采取一些措施来改善他们的免疫健康。限制和管理压力，获得更多的休息睡眠，不仅可以提高免疫力，还可以帮助对抗焦虑、抑郁和其他许多疾病和失调。这些措施，加上均衡的饮食，也支持着人体的微生物群落，这些有益的微生物位于我们的外表面和内表面。Demmig-Adams说，这些微生物不仅提供了抵御感染入侵者的第一道防线，而且还产生...
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PNAS：重大发现！科学家发现生物钟的关键开关
PNAS：重大发现！科学家发现生物钟的关键开关
2018 - 06 - 08
2018年6月6日讯 /生物谷BIOON /——PERIOD 2 (PER2)蛋白的多点磷酸化是决定哺乳动物生物钟周期的关键步骤。过去的研究认为PER2被酪蛋白激酶1（CK1）磷酸化的过程需要一种未被发现的蛋白激酶来启动，而CK1是一种从藻类到人类都高度保守的生物钟必需蛋白。这些磷酸化过程可以稳定PER2，延缓其降解以延长生物钟周期。图片来源：CCO public domain为了找到这个必需的蛋白质，一个由杜克-新加坡国立大学医学院研究人员领导的国际团队对小鼠PER2启动磷酸化的过程进行了综合的生物化学和生物物理学分析，结果惊讶地发现CK1δ/ε就是他们寻找的启动激酶。此外，他们还发现CK1ε和一个最近发现的CK1δ2剪接变体可以比CK1δ1更有效地启动磷酸化。尽管过去研究显示CK1对PER2的磷酸化对细胞环境很不敏感，但是研究人员通过使用生物节律磷酸化开关数学模型发现CK1羧基端尾部使得生物钟周期对细胞信号敏感。这些研究表明CK1羧基端是生物节律的一个重要的调节因子。（生物谷Bioon.com）参考资料：Rajesh Narasimamurthy et al, CK1δ/ε protein kinase primes the PER2 circadian phosphoswitch, Proceedings of the National Academy of Sci...
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EVOS™ Vessel Holder, Greiner T-75 flask
产品名称： EVOS™ Vessel Holder, Greiner T-75 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 T-75 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 ves...
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EVOS™ Vessel Holder, Hemocytometer
产品名称： EVOS™ Vessel Holder, Hemocytometer
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 a hemocytometer. 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 hol...
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EVOS™ Vessel Holder, Nunc™ T-75 flask
产品名称： EVOS™ Vessel Holder, Nunc™ T-75 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 Nunc® T-75 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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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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