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1
2018 - 05 - 18
5月18日消息,哈佛大学的创业者Rejuvenate Bio已经开始测试为犬类延长寿命的方法,如果这项技术获得成功,那么将在人类身上进行试验。公司的合创者,63岁的George Church称,如果在查理士王小猎犬身上进行的医学测试成果的话,他将在自己身上进行测试。       查理士王小猎犬通常有一种心脏上的小疾病,导致半数物种在10岁左右时会因病死去。研究人员的研究已经表明,改变单一生物体的基因能够使其寿命加倍,并且在苍蝇身上取得了成功。这项研究的目的是观察在保持物种年轻身体状态的同时延长物种寿命会带来什么样的结果。Church教授被视作 “基因编辑”领域的一位先驱者,而且也正致力于借助史前DNA复活猛犸象的研究。他的返老还童实验室将发表一份关于这项技术的报告,研究人员将对老龄化疾病(比如说心脏病和糖尿病等)相关的两种基因进行修改,从而延长啮齿动物的寿命。麻省理工学院《技术评论》去年6月获得的一份文件表明,该创业公司在塔夫茨陆军兽医学院对4只米格鲁猎犬进行了测试。虽然文件中关于这次医学实验的过程透漏的很少,但是麻省理工学院的《技术评论》杂志推测,这一过程可能需要抑制一种充当“总开关”的蛋白质。Church教授称:“我们已经在老鼠身上进行了一系列的实验,而且我们正在犬类身上进行一些实验,随后我们将在人类身上进行这项技术的实验。犬类不仅仅是接...
2
2019 - 03 - 15
基因组的遗传信息得以表达,首先需要 RNA polymerase (RNAP) 以 DNA 为模板合成 RNA。基因转录不仅是基因表达第一步,还是基因表达的主要调控步骤。对 RNAP 分子机器结构、运行机理以及调控机制的研究能够回答基因表达调控的基础生物学问题。在转录起始阶段,细菌的 RNAP 与转录起始σ因子形成复合物,依次执行启动子双链 DNA 的识别、解链以及 RNA 起始合成等关键步骤。细菌 RNAP 通过与多个σ因子结合特异性调控基因转录,其中 Extra-Cytoplasmic Function(ECF)σ因子是细菌中种类最多的一类σ因子,它可以感受细菌胞内外环境变化,起始特异性的基因转录。ECF σ因子赋予细菌适应逆境的能力,对于致病菌的致病性和耐药性尤为重要。以结核分枝杆菌(Mycobacterium tuberculosis)为例,其 RNAP 分别与 10 种 ECF σ因子结合,通过识别特异启动子序列启动相应基因表达,多个 ECF σ因子与结核分枝杆菌的致病、侵染以及耐药直接相关。3 月 11 日,国际学术期刊《自然 - 通讯》(Nature communications)在线发表了中国科学院分子植物科学卓越创新中心 / 植物生理生态研究所 / 中科院合成生物学重点实验室张余研究组题为 Structure basis for transcription ini...
3
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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产品名称:

EVOS™ M7000 Imaging System

上市日期: 2019-04-15
产品类别: EVOS

规格

Detection Method:Chromogenic, Fluorescent
Product Line:EVOS™
Product Size:1 system
Shipping Condition:Room Temperature


  • 产品描述
  • 产品功能
  • 产品参数

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-stacks in scan mode, and a superb optomechanical design enable the generation of publication-quality images and data with just a few clicks when and where needed.

The EVOS M7000 Imaging System offers these advantages:
• Outstanding image quality and versatility with a 5-position objective turret, 4-color LED fluorescence and transmitted light channels, and 3.2 MP CMOS color and B/W cameras
• Exceptional usability with fully automated X/Y scanning stage, autofocus, and acquisition routines
• High-speed image acquisition coupled with multi-position well scanning, and Z-stack and tile-stitch options lend power and flexibility to your data generation
• Fully integrated time-lapse live cell imaging using the optional EVOS Onstage Incubator for precise control of temperature, gases for normoxic or hypoxic conditions, and humidity
• Powerful image analysis capabilities for cell segmentation and quantification with the optional Celleste™ Image Analysis Software

Fully automated imaging system
The EVOS M7000 system combines and integrates precision components with a unique modern design functionality that enables high-quality automated fluorescence imaging anywhere with unprecedented workflow efficiency. Full automation of the precision X/Y-stage movement; changing of the 4 LED fluorescent light cubes, 5-position objective turret, focus, and exposure; and switching of the dual camera make the EVOS M7000 system an exceptional platform for a variety of demanding imaging applications. Through the intuitive acquisition interface, you can program the EVOS M7000 system to run well-plate scanning, time lapse experiments, and tile-stitch/montage area scans in Z-stack and/or time-lapse modes in your vessel of choice. For live cell imaging over multiple hours or days, the optional EVOS Onstage Incubator, which functions as an environmental chamber on top of the microscope stage, is operated seamlessly from within the instrument interface. The EVOS M7000 system is compatible with all accessories for the predecessor EVOS FL Auto imaging system.

Versatile and highly configurable
With a 5-position objective turret and the ability to simultaneous acquire images in four fluorescence channels plus transmitted light, the optical system can be easily configured to meet your needs. Choose from our broad range of high quality coverslip-corrected and long-working-distance objectives for use with plastic vessels or glass sides. Available from 1.25X to 100X magnification in achromat, fluorite, or apochromat models, together with over twenty LED light cubes, the sample imaging options are limitless. Dual monochrome and color high-sensitivity dual CMOS cameras enable seamless imaging of both fluorescent and chromogenically stained samples. Interchangeable vessel holders accommodate most vessel types and sizes, including slides, multi-well plates, culture flasks, and Petri dishes, and afford precise control and sample alignment by the automated stage. The vessel creation wizard in the user interface enables creation of profiles for custom sample vessels.

Powerful software
The EVOS M7000 software presents users with an extensive suite of tools for acquisition, visualization, and analysis. The user interface was designed with a strong emphasis on usability, including an option to view samples in a single field mode (Field View) or in a window that covers a much larger area (Area View). By using a zoom function, the Area View size can be adjusted. A user can explore a large sample area at low magnification, define regions of interest, and then seamlessly transition to the Scan function in Automate Mode and execute an area scan at higher magnification.

The enhanced power of the EVOS M7000 system enables more demanding automated acquisition routines like area scanning in time lapse and Z-stacks in scan mode to be performed. Visualization capabilities include multi-field image viewing gallery, mosaic tiling and tile stitching options, Z-stack visualization, and a video recording and movie maker/editor for time lapse sequences. The EVOS M7000 system is fully compatible with the EVOS Onstage Incubator environmental chamber for control of temperature, gases, and humidity. With the ability generate both hypoxic and normoxic conditions, it is possible to study live cells over extended periods with highly flexible time lapse automation routines.

For users needing more powerful image analysis capabilities, images acquired on the EVOS M7000 system can be analyzed directly using the optional Celleste Image Analysis Software. Celleste software offers powerful tools for image segmentation and classification that can be applied to a range of cell analysis applications for counting and measuring intensity, area, and shape changes over time, and more.

Smart LED illumination technology
All EVOS fluorescence imaging systems utilize our proprietary LED light cubes. This light engine outputs remarkable intensity over a short light path and delivers incomparable fluorophore excitation. 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 to the sample and experimental conditions to minimize the risk of photo-toxicity and photo-bleaching in time-lapse studies. Hard-coated filters give sharper edges and significantly higher transmission efficiencies than traditional soft-coated filters.

Easy to use and reliable
The EVOS M7000 Imaging System is powerful, yet offers the simplicity of plug-and-play. Like other EVOS systems, it requires no warm-up or cool-down periods. The LED light source guarantees exceptional stability and durability, so you can turn the unit on and off whenever you need to image a sample. The environmentally safe, mercury-free LED bulbs are rated for >50,000 hours, compared to 300 hours for a typical mercury bulb and 1,500 hours for a metal halide bulb. The long lifetime and low energy consumption translate into significantly lower operating costs compared to instruments with conventional light sources. The EVOS M7000 system is powered by an external Dell PC with an Intel Core i7-8700 processor, 32 GB DDR4 RAM, 512 GB PCIe SSD, and NVIDIA Quadro P1000 with 4 GB discrete video graphics running Windows 10, designed to operate with touchscreen monitor and microscope. Whether acquiring single images or setting up automated routines, the EVOS M7000 system is remarkably easy to use and run. The 1920 x 1080 pixel resolution 23' LCD touch screen monitor enables “finger swipes” to expand or zoom in on images, and moving between microwell plate wells is done by a single touch. Operation is also also fully controllable via mouse.

The EVOS imaging systems are built from the ground up to maximize performance and optimize workflow. You will be astonished at how easy it is to operate and amazed at how extraordinary your images look on-screen.

Explore the entire EVOS line of imaging systems, accessories, and offers ›

System and hardware specifications
Optics: infinity‐corrected optical system; RMS‐threaded objectives with 45-mm parfocal distance
Imaging mode: fluorescence, brightfield, color brightfield, and phase contrast
Illumination: five position chamber for 4 fluorescence light cubes plus brightfield; light cubes with integrated hard coated filter set and LED light source with >50,000 hour life; broad selection of standard and specialty light cubes
Imaging methods: single color, multi-color, area scan with montage or tile-stitch, time lapse, Z-stacking, movie capture
Objective capacity: 5‐position turret
Objectives (not included): wide selection of high‐quality LWD and coverslip‐corrected objectives
Condenser: 60-mm long working distance condenser, 4 position turret with a clear aperture and 3 phase annuli
Stage: motorized X/Y scanning stage; travel range 120 mm x 80 mm with sub‐micron resolution, drop‐in inserts to receive vessel holders and lock down holders to fix sample in place during long scans
Focus mechanism: automated focus mechanism with sub‐micron resolution
LCD display: 23' high‐resolution touch screen color monitor (also fully controllable via mouse); 1920 x 1080 pixel resolution
Cameras: high-sensitivity 3.2 MP (2048 x 1536) monochrome CMOS sensor with 3.45 µm pixel resolution; high-sensitivity 3.2 MP (2048 x 1536) color CMOS sensor with 3.45 µm pixel resolution
Computer: external Dell PC with an Intel Core i7-8700 processor, 32 GB DDR4 RAM, 512 GB PCIe SSD, and NVIDIA Quadro P1000 with 4 GB discrete video graphics running Windows 10, designed to operate with touchscreen monitor and microscope
Captured images: 16‐bit RAW monochrome: TIFF, PNG; 8-bit: TIFF, PNG, JPG; movies and time‐lapse: AVI, WMV
Output ports: Computer: 1 x USB 3.1 Gen 2 Type-C; 5 x USB 3.1 Gen 1 Type-A; 4 x USB 2.0 Type-A; 1 Serial; 2 Display Ports 1.2; 1 RJ-45; 2 PS/2; 1 UAJ; 1 Line-out
Networking capability: connection through Windows/SMB network via an Ethernet cable connection
Power supply: 24 V AC adapter with country‐specific power cords
Dimensions (L x W x H): 18 x 14 x 13 inches (457 x 330 x 356 mm)
Weight: 16/35 (kg/lb)


规格

Detection Method:Chromogenic, Fluorescent
Product Line:EVOS™
Product Size:1 system
Shipping Condition:Room Temperature


规格

Detection Method:Chromogenic, Fluorescent
Product Line:EVOS™
Product Size:1 system
Shipping Condition:Room Temperature


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