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1
2019 - 02 - 13
日前,《分子植物》(Molecular Plant)在線發(fā)表了中國農(nóng)業(yè)科學(xué)院油料作物研究所王漢中院士團(tuán)隊(duì)最新成果。該團(tuán)隊(duì)在國際上首次成功克隆了農(nóng)作物種子性狀的第一個細(xì)胞質(zhì)調(diào)控基因 orf188,并揭示了該基因調(diào)控油菜種子高含油量的作用機(jī)制。該成果為油菜高含油量育種提供了新途徑,為育種過程中雜交母本的選擇提供了理論支撐,對于農(nóng)作物不同類型細(xì)胞質(zhì)的應(yīng)用具有重要的指導(dǎo)意義。含油量是油菜產(chǎn)油量最重要的構(gòu)成因子之一,隨著現(xiàn)代育種對含油量潛力的不斷挖掘,提高品種的含油量越來越困難。該團(tuán)隊(duì)在油菜含油量遺傳研究的基礎(chǔ)上,從細(xì)胞質(zhì)效應(yīng)著手對含油量母體調(diào)控新機(jī)制研究取得突破,篩選到兩個對含油量具有極顯著細(xì)胞質(zhì)正負(fù)效應(yīng)的品種,鑒定出特異基因 orf188 控制細(xì)胞質(zhì)的含油量正效應(yīng),過表達(dá)該基因可以大幅度提升含油量。研究表明,orf188 為 nap(nap-like)型油菜品種所特有基因,是一個新近進(jìn)化形成的嵌合基因。該團(tuán)隊(duì)十余年來圍繞油菜種子性狀的母體調(diào)控進(jìn)行系統(tǒng)研究,此次對細(xì)胞質(zhì)基因調(diào)控種子含油量機(jī)理的揭示,是該團(tuán)隊(duì)繼發(fā)現(xiàn)角果皮發(fā)育調(diào)控種子粒重和含油量之后發(fā)現(xiàn)的又一條母體調(diào)控新途徑,進(jìn)一步豐富和完善了種子性狀的母體調(diào)控理論,也為其他農(nóng)作物性狀細(xì)胞質(zhì)效應(yīng)的解析提供了借鑒。相關(guān)論文信息:DOI:10.1016/j.molp.2019.01.012來源:中國科學(xué)報轉(zhuǎn)載:生物360
2
2019 - 06 - 14
隨著技術(shù)飛速發(fā)展、醫(yī)學(xué)數(shù)據(jù)的持續(xù)擴(kuò)增以及硬件設(shè)備的不斷提升,人工智能和醫(yī)療的結(jié)合方式越來越多樣化。目前AI在醫(yī)療領(lǐng)域中的落地的應(yīng)用場景主要有醫(yī)學(xué)影像、智能診療、智能導(dǎo)診、智能語音、健康管理、病例分析、醫(yī)院管理、新藥研發(fā)和醫(yī)療機(jī)器人等,其中在醫(yī)學(xué)影像中的應(yīng)用最為廣泛。一、影像醫(yī)學(xué)發(fā)展現(xiàn)狀醫(yī)學(xué)影像是醫(yī)生完成診斷的主要依據(jù),通過對影像的分析和比較,從而完成有依據(jù)的診斷。但是在實(shí)際過程中,往往會存在以下問題:(1)影像學(xué)診斷人才資源緊缺。醫(yī)療機(jī)構(gòu)普遍缺乏高水平的影像醫(yī)師,在疾病診斷時往往會發(fā)生同病異影,異病同影等情況。(2)傳統(tǒng)定性分析存在診斷誤差。醫(yī)生普遍擅長定性分析,很多微小的定量變化無法通過肉眼判斷,很難做到定量分析。(3)醫(yī)生閱片時間長。目前的影像呈現(xiàn)方式為數(shù)據(jù)和圖像,而不是最有效的信息,很大程度上限制了醫(yī)生的人工閱片速度。二、AI+醫(yī)學(xué)影像助力疾病診斷通過引入人工智能可有效解決部分問題,目前人工智能在醫(yī)學(xué)影像領(lǐng)域的應(yīng)用方向主要以下幾類:1. 影像設(shè)備的圖像重建AI可以通過算法的圖像映射技術(shù),將采集的少量信號恢復(fù)出與全采樣圖像同樣質(zhì)量的圖像,而且使用圖像重建技術(shù),可以由低劑量的CT和PET圖像重建得到高劑量質(zhì)量圖像。這樣在滿足臨床診斷需求的同時,還能夠降低輻射的風(fēng)險。2. 智能輔助診斷疾?。?)智能輔助診斷肺部疾病國內(nèi)應(yīng)用AI+CT影像最為成熟的領(lǐng)域在肺結(jié)節(jié)的識別上。AI能夠有效識...
3
2019 - 12 - 25
前瞻記憶是指個體記住未來要完成任務(wù)的能力。兒童進(jìn)入學(xué)校后,前瞻記憶任務(wù)逐漸增多,對前瞻記憶能力的要求也逐漸增高。前瞻記憶任務(wù)成功的關(guān)鍵在于當(dāng)個體看到線索時能主動提取并執(zhí)行意圖。前瞻記憶線索分為三種,時間線索(如周六晚上7點(diǎn)記得參加朋友的生日聚會)、事件線索(如路過超市記得買水果)和活動結(jié)束線索(如寫完作業(yè)記得找家長簽字)。三種線索的提取難度存在差異,這可能與其對注意資源的需求不同有關(guān)。較之正常發(fā)育的兒童,多動癥兒童在日常活動中常有注意力不集中和健忘的表現(xiàn),提示其前瞻記憶能力可能存在缺損。然而,對多動癥兒童前瞻記憶功能的研究較少,更缺乏研究直接考察多動癥兒童在三種線索條件下的前瞻記憶表現(xiàn)及其認(rèn)知加工特點(diǎn)。因此,中國科學(xué)院心理研究所心理健康重點(diǎn)實(shí)驗(yàn)室神經(jīng)心理和應(yīng)用認(rèn)知神經(jīng)科學(xué)(NACN)實(shí)驗(yàn)室陳楚僑研究組與北醫(yī)六院醫(yī)生錢英、濰坊醫(yī)學(xué)院教授王艷郁合作考察了多動癥兒童在時間、事件和活動結(jié)束線索條件下的前瞻記憶表現(xiàn)。該研究招募了28名臨床診斷的多動癥兒童和28名年齡和性別匹配的正常發(fā)育兒童,采用釣魚游戲任務(wù)(Yang, Chan, Shum, 2011)測查兒童在三種線索條件下的前瞻記憶功能。該任務(wù)采取經(jīng)典的雙任務(wù)范式,主任務(wù)要求兒童釣魚,并同時關(guān)注前瞻記憶線索,在線索出現(xiàn)時兒童需要停止釣魚并執(zhí)行前瞻記憶任務(wù)。在時間線索條件下,兒童要記得每到整分鐘就喂貓吃魚;在事件線索條件下,兒童看到特殊條...
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產(chǎn)品名稱:

EVOS? M7000 Imaging System

上市日期: 2019-04-15
產(chǎn)品類別: EVOS

規(guī)格

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


  • 產(chǎn)品描述
  • 產(chǎn)品功能
  • 產(chǎn)品參數(shù)

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)


規(guī)格

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


規(guī)格

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


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