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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...
3
2019 - 09 - 05
2016年《消失的微生物》一书问世,肠道微生态研究走入大众视野,目前全球范围内针对微生物与肥胖、哮喘、过敏、糖尿病、肿瘤、精神类疾病的研究正逐步开展。一、肠道微生物概况人体是由自身细胞及共生的大量微生物细胞所共同组成的复杂共生生命体。目前研究认为人体肠道内聚集的微生物数目可达1012~1014个,是人体自身细胞数目的10倍,微生物包含的基因数目超过987万个,人类自身基因数只有2万个左右,是人体自身基因数目的几百倍,这些后天获得的共生菌群及其所携带的遗传及分子信息即可称为微生物组。(一)人体肠道微生物是如何建立的?有研究表明,人体在出生成长过程中,主要在两个重要的环节、以两种不同的方式实现对肠道菌群的塑造。第一个环节是在分娩过程,婴儿会从母亲产道获得健康的肠道菌群,剖腹产和孕期抗生素则会改变正常婴儿菌群的建立。另一个环节则是出生后的哺乳及断奶后的膳食干预。在女性乳腺中存在着乳酸菌等系列微生物,这些微生物在哺乳过程中进入并定植于婴儿肠道。随着哺乳期的结束,日趋丰富的膳食外源营养物质则长期调节着人体肠道微生物中的的变化。(二)肠道微生物对人体健康有何影响?肠道菌群与人体互利共生,依靠人体没有消化的食物残渣和肠道分泌的黏液和脱落的死细胞作为营养来维持很高的种群水平。活跃生长的肠道菌群会产生大量的活性物质,同时包括短链脂肪酸、维生素和抗氧化等有益健康的产物,以及神经毒素、致癌物质和免疫毒素...
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产品名称:

EVOS™ Light Cube, RFP

上市日期: 2019-04-12
产品类别: EVOS

规格

Excitation⁄Emission (nm):Ex: 531/40 Em: 593/40
For Use With (Equipment):Countess® II FL Automated Cell Counter, EVOS® FL Auto Imaging System, EVOS® FL Color Imaging System, EVOS® FL Imaging System
Product Line:EVOS®
Product Size:1 each
Quantity:1 each
Type:LED Light Cube


  • 产品描述
  • 产品功能
  • 产品参数

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® 555, CellMask™ Orange, pHrodo®, RFP, SYTOX® Orange and other fluorophores with excitation and emission maxima near 531 and 593 nm.

EVOS® light cubes offers you these important advantages:

• A shorter light path that affords superior detection of fluorescent signals
• Continuous illumination that enables consistent results
• A 50,000+ hour bulb lifetime that affords lower operating costs
• Adjustable light intensity that helps reduce photobleaching

Revolutionary Light Path
By placing the LED light cube as close as possible to the objective turret, the number of optical elements in the light path is minimized. High-intensity illumination over a short light path increases the efficiency of fluorophore excitation, providing better detection of weak fluorescent signals.

Continuous Light Intensity
Mercury arc lamps can decrease in intensity by 50% in the first 100 hours of operation—plus, images acquired in different sessions cannot be quantitatively compared using mercury illumination without complicated calibrations. Because EVOS® systems have continuous light cube intensity, users can rely on consistent illumination and can compare quantitative results from images acquired on different days. Each light cube contains a precisely matched set of optical components to optimize the position, evenness, and intensity of the light beam. Digitally controlled LED light sources allow adjustment of illumination levels, dramatically improving control over photobleaching.

Less Expensive to Own and Maintain
The LED bulbs on the EVOS® systems are rated for >50,000 hours (~17 years), compared to 300 hours for a typical mercury bulb and 1,500 hours for a metal halide bulb. This translates to savings in the overall upkeep of your instrument.

EVOS® Hard-coated Filter Sets for Higher Transmission Efficiencies
Hard-coated filter sets are more expensive that soft-coated filters, but they have sharper edges and significantly higher transmission efficiencies that typically result in >25% more light transmission than traditional soft-coated filters. With the EVOS® systems' hard-coated filter sets, your light cubes cost less over time. Plus, you will have brighter fluorescence, higher transmission efficiencies, the ability to detect faint fluorescence signals, and better signal-to-noise ratios. 


规格

Excitation⁄Emission (nm):Ex: 531/40 Em: 593/40
For Use With (Equipment):Countess® II FL Automated Cell Counter, EVOS® FL Auto Imaging System, EVOS® FL Color Imaging System, EVOS® FL Imaging System
Product Line:EVOS®
Product Size:1 each
Quantity:1 each
Type:LED Light Cube


规格

Excitation⁄Emission (nm):Ex: 531/40 Em: 593/40
For Use With (Equipment):Countess® II FL Automated Cell Counter, EVOS® FL Auto Imaging System, EVOS® FL Color Imaging System, EVOS® FL Imaging System
Product Line:EVOS®
Product Size:1 each
Quantity:1 each
Type:LED Light Cube


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