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1
2018 - 07 - 13
对于酸奶我们并不陌生,超市冷藏柜中形形色色的酸奶有时候常常让我们眼花缭乱,酸奶作为人们日常饮食中不可缺少的食物,其对机体健康都有什么好处呢?看看下面这些研究吧!【1】希腊酸奶vs原味酸奶vs低脂酸奶 你如何选择一种最健康的酸奶?新闻阅读:Plain, Greek, low-fat? How to choose a healthy yoghurt酸奶是世界上最古老的发酵乳制品之一,其发源可以追溯到人类文明的开始,当人类开始驯养动物生产牛奶时,对于牛奶的保质期,人类就需要想出一些解决方案了。yoghurt(酸奶)一词来自土耳其,也就是说,在酸奶的生产过程中,牛奶会发生凝结或增稠的过程。与牛奶一样,酸奶也富含钙质和蛋白质,而且其还能为机体提供其它营养成分,比如碘、维生素D、B2、B12和锌等。但酸奶的营养要高于牛奶,主要的原因是发酵的过程会让其更易于被机体所消化,因此营养物质就可以很轻松地被机体所吸收。然而酸奶也有很多类型,比如希腊酸奶和液态酸奶,以及一些添加水果和益生菌的酸奶,那么你知道哪种酸奶最健康吗?通过向鲜奶中引入一些特定的细菌就能制作酸奶了,比如嗜热链球菌、德氏乳杆菌和保加利亚乳杆菌等。通常情况下这些细菌都会在酸奶中出现并且形成酸奶发酵液,它们的协同关系是最终产品一致性的关键因素,同时这也能够带来一些健康益处,比如降低机体腹泻的严重程度和持续时间等。【2】J Nutr and ...
2
2019 - 05 - 06
来源: 中国科学报年初,一部电视剧《都挺好》火遍全国,大结局时剧中一直让人恨得牙痒痒的 “作爹” 苏大强,因患上了阿尔茨海默氏症(AD,俗称老年痴呆症)而成功“洗白”,惹出了不少人的眼泪。阿尔茨海默氏症离我们并不遥远,由它引发的故事也是常有耳闻,大多伴随着无奈与辛酸。随着全球老龄化进程的加快,愈来愈多的阿尔茨海默氏症患者将给家属及社会带来沉重的负担。根据国际阿尔茨海默氏病协会的统计数据,2018 年全世界有 5000 万老人患有痴呆,每 3 秒钟,就有 1 位患者产生;中国是阿尔茨海默氏病的重灾区,估计有 1000 万患者。关于阿尔茨海默氏症发病机制和治疗方法的研究一直都是科研界关注的重点之一。近日,中国科学院昆明动物研究所姚永刚课题组在阿尔茨海默氏症的治疗研究上取得重要进展,该研究阐明了核受体过氧化物酶体α激动剂吉非罗齐和匹立尼酸的抗阿尔茨海默氏症分子机制。相关论文在线发表于《自噬》(Autophagy)杂志上。诱导自噬,清除 Aβ作为发生在老年前期与老年期的一种常见的神经退行性脑病,阿尔茨海默氏症是最常见的老年痴呆类型,其发病率随着年龄增长而显著增加。其临床表现为病人渐进性记忆丧失、认知能力下降并伴有焦虑等其他精神相关症状。对于阿尔茨海默氏症的发病机制,现有很多学说,其中影响最广泛的有β- 淀粉样蛋白(β-amyloid,Aβ)瀑布理论,认为 Aβ的生成与清除失衡是导致神经元变...
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2019 - 08 - 30
最近,《自然》杂志报道了不少关于癌症的研究。上周,学术经纬团队分享了一则癌症研究的重要突破——通过荧光标记,科学家们能够看清癌细胞如何“腐蚀”周边的健康细胞,发生转移。今天,我们又读到了一篇关于癌症转移的最新论文,它深刻揭示了癌症转移的复杂性,并提醒我们,在攻克癌症的道路上,我们还有很长的路要走……先来聊聊癌症。我们知道,癌症的发展就好像是一个熊孩子长大一样,会分成不同的阶段。在早期,癌细胞会疯狂生长,侵入和传播(invasion and dissemination)到组织内,在身体里形成肿瘤。到了晚期,癌细胞则会发生转移(metastasis),跑到身体的其他器官里落地生根,形成新的病灶。现在的医学知识告诉我们,一旦癌症发生了转移,患者的生命就岌岌可危。可是,癌细胞在一个地方长得好好的,它为啥会发生转移呢?过去的很多科学家相信,这与一种叫做E-cadherin(E-钙粘蛋白)的蛋白质有关。从功能上看,它负责把不同的细胞“粘”在一起。如果癌细胞能够减少这种钙粘蛋白的表达,就会变得更有“活动性”,也更容易发生转移。不过,科学家们也观察到了一些例外——在一种叫做“乳腺导管癌”的癌症中,发生转移的癌细胞,里头的E-钙粘蛋白含量可不少。这是为啥呢?有科学家解释说,这是因为癌细胞慢慢地又把自己“粘”回到了一起。这听起来是个合理的解释,但没有让所有人感到信服。为了寻找其他原因,来自美国知名的约...
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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:...
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...
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...
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...
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 ...
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...
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...
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 ...
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 has a 25.4 mm opening and accommodates most vessel types. 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 samp...
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...
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...
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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