产品中心 Products
最新新闻 / News More
1
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...
2
2019 - 03 - 29
空气污染有关众所周知,污浊的空气对身体有害,每年在全球范围内造成数百万人死亡。这使空气污染成为比吸烟更厉害的杀手。然而,空气污染对人类大脑也有害吗?一项研究发现,在英国污染最严重地区,青少年的精神疾病问题(包括幻觉)更加常见。相关成果日前发表于《美国医学会杂志—精神病学》。然而,这种关联并非意味着吸入污浊空气会使青少年患上精神疾病,因为可能还有其他解释。该研究作者之一、伦敦国王学院的 Helen Fisher 表示,这项研究未显示出因果关系。Fisher 和同事发现,在 2000 名 18 岁青少年中,30% 的人报告称其在青少年时期至少有过一次精神疾病经历——其他针对年轻人的研究也报告了类似数字。然而研究发现,当把这些青少年的住址与空气污染情况作对照时,那些生活在污染程度较高地区的青少年更有可能有精神疾病史。在氮氧化物(由柴油车产生的污染物)含量最高的地区,每 20 名青少年中就有 12 名报告患有精神疾病;而在空气较清洁地区,降至每 20 人中有 7 人患病。目前尚不清楚空气污染与精神疾病存在何种关联。该团队提出的一种推测性机制是,污染物累积会直接影响大脑。研究表明,空气污染与额叶皮层和嗅球的炎症和退化有关,其中嗅球是大脑中负责嗅觉的部分。而大脑炎症已被证实与精神疾病有关。一个更简单的解释可能是,不是污染空气本身,而是汽车排放的噪音污染带来了问题。噪音污染会增加压力、扰乱睡眠,...
3
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,...
联系我们
北京照生行仪器设备有限公司
销售热线:010-62929079
公司总机:010-62929079
图文传真:010-62929277
总部地址:北京市海淀区西二旗西路热力公司院内泰禾文化园二层
产品名称:

EVOS™ Light Cube, GFP

上市日期: 2019-04-12
产品类别: EVOS

规格

Excitation⁄Emission (nm):Ex: 470/22 Em: 525/50
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 GFP light cube is ideal for use with Alexa Fluor® 488, Calcein, AM, CellLight® GFP, CellTracker™ Green, CellRox® Green, FITC, Fluo-4, GFP, and other fluorophores with excitation and emission maxima near 470 and 510 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: 470/22 Em: 525/50
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: 470/22 Em: 525/50
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


地址:中国·北京·海淀区-西二旗西路热力公司院内泰禾文化园二层
电话:010-62929079
Copyright@ 2015-2016 北京照生行仪器设备有限公司
传真:+86 0755-2788 8009
邮编:330520