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1
2019 - 02 - 13
日前,《分子植物》(Molecular Plant)在線發(fā)表了中國(guó)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(guó)際上首次成功克隆了農(nóng)作物種子性狀的第一個(gè)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(duì)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(duì)含油量潛力的不斷挖掘,提高品種的含油量越來(lái)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(duì)含油量母體調(diào)控新機(jī)制研究取得突破,篩選到兩個(gè)對(duì)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(gè)新近進(jìn)化形成的嵌合基因。該團(tuán)隊(duì)十余年來(lái)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(duì)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(lái)源:中國(guó)科學(xué)報(bào)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(lái)越多樣化。目前AI在醫(yī)療領(lǐng)域中的落地的應(yīng)用場(chǎng)景主要有醫(yī)學(xué)影像、智能診療、智能導(dǎo)診、智能語(yǔ)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(duì)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(huì)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(shí)往往會(huì)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(zhǎng)定性分析,很多微小的定量變化無(wú)法通過肉眼判斷,很難做到定量分析。(3)醫(yī)生閱片時(shí)間長(zhǎng)。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(hào)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(shí),還能夠降低輻射的風(fēng)險(xiǎn)。2. 智能輔助診斷疾?。?)智能輔助診斷肺部疾病國(guó)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(shí)別上。AI能夠有效識(shí)...
3
2019 - 12 - 25
前瞻記憶是指?jìng)€(gè)體記住未來(lái)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(duì)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(gè)體看到線索時(shí)能主動(dòng)提取并執(zhí)行意圖。前瞻記憶線索分為三種,時(shí)間線索(如周六晚上7點(diǎn)記得參加朋友的生日聚會(huì))、事件線索(如路過超市記得買水果)和活動(dòng)結(jié)束線索(如寫完作業(yè)記得找家長(zhǎng)簽字)。三種線索的提取難度存在差異,這可能與其對(duì)注意資源的需求不同有關(guān)。較之正常發(fā)育的兒童,多動(dòng)癥兒童在日?;顒?dòng)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(duì)多動(dòng)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(dòng)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(guó)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(dòng)癥兒童在時(shí)間、事件和活動(dòng)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(dòng)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(cè)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(shí)關(guān)注前瞻記憶線索,在線索出現(xiàn)時(shí)兒童需要停止釣魚并執(zhí)行前瞻記憶任務(wù)。在時(shí)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? FL Imaging System

上市日期: 2019-04-15
產(chǎn)品類別: EVOS

規(guī)格

Color:Transmitted Light
Data Output:BMP Files,?JPG Files,?PNG Files,?TIFF Files
Detection Method:Fluorescent
Dimensions:36 cm (14 in) (W) x 58 cm (23 in) (H) x 47 cm (19 in) (D)
Display Interface:15-inch color monitor,?Adjustable tilt
For Use With (Equipment):Fluorescence Microscope
Format:Specific Holder Attachments
Frequency:50?60 Hz
Input Voltage:100-240 VAC
Objectives:5 Objective Turret
Product Line:EVOS?
Product Size:1 each
Stage:Mechanical stage with X-Y axis fine-positioning controls
Weight:15.3 kg (33.7 lbs)


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

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 advantages:

? Easy installation; no maintenance, assembly, alignment, or calibration
? For four-color fluorescence and transmitted light applications
? Five-position objective turret with front controls
? On-board software
? All-in-one design: digital camera, precision optics, LCD display, and USB storage

Fully Integrated Imaging System
The EVOS? FL system represents a new concept in transmitted light inverted microscopy. It is a fully integrated imaging system that combines precision optics, a 15' high-resolution LCD display, and a highly sensitive Sony ICX445 monochrome CCD camera (1280 x 960 pixel resolution, 1.3 Megapixels). Images are seamlessly acquired through the intuitive user interface using a mouse for easy control. Monochrome cameras are commonly used for high-performance fluorescence applications and provide the best sensitivity for detection of faint fluorescence signals. Color cameras, as on the EVOS? FL Color System, have lower fluorescence sensitivity but have the advantage of being able to differentiate structures by color in transmitted light (e.g., imaging stained tissue samples).

Compare cell imaging systems >

Versatile and Highly Configurable
The EVOS? FL system features an easily accessible 5-position objective turret and a 3-position condenser turret. The 4 fluorescence light cubes are lever-actioned for rapid and easy selection. The optical system can be configured to best meet your needs using our full range of high-quality objectives from 2x to 100x magnification. Lighting settings are automatically adjusted to match the objective magnification. The EVOS? FL system features a mechanical stage with X/Y-axis fine-positioning using control knobs conveniently located on the left side and the front of the stage. The stage accommodates EVOS? vessel holders that provide a perfect fit for most vessel types and sizes. Interchangeable stage plates accommodate most vessel types and sizes, including flasks, Petri dishes, multi-well plates, and slides.

Smart LED Illumination Technology
All EVOS? fluorescence imaging systems utilize 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 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. Hard-coated filters give sharper edges and significantly higher transmission efficiencies than traditional soft-coated filters.

Integrated Software
The on-board computer makes the EVOS? FL system easy to run and use, and the intuitive, comprehensive software facilitates both image acquisition and analysis. Modules include time-lapse acquisition, manual-assist cell counting, and image review. Saved user settings work in conjunction with 'smart' controls to help increase efficiency and ease of use. Image data are saved to a USB flash drive for easy, portable data transfer or to a Windows-networked local server. Images can be saved in PNG, JPEG, BMP, and TIFF formats with a maximum captured image resolution of 1280 x 960 pixels.

These features make the EVOS? FL system ideal for both routine and demanding fluorescence imaging applications such as GFP-vector transfection efficiency analysis, routine cell and tissue culture, cell confluence determination, stem cell growth and differentiation, and developmental biology and tissue slice analyses. And the compact footprint makes it as easy to use the EVOS? FL system in a cell culture hood as on the bench.

Easy to Use and Reliable
The EVOS? FL Imaging System is plug-and-play. In addition to an exceptionally easy set-up and installation, it requires no warm-up or cool-down periods. The LED light source offers 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 (~17 years) of life, compared to 300 hours for a typical mercury bulb and 1,500 hours for a metal halide bulb. The long life and low energy consumption translate into significantly lower operating costs compared to instruments with conventional light sources. Finally, the advanced ergonomic design of the EVOS? systems removes the strain associated with conventional microscopes, enables shared viewing, and makes moving the units easy. For extended or precision use, the EVOS? arm rest provides comfortable support.

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.

Learn more about the EVOS? FL Imaging System
Explore the entire EVOS? line of imaging systems and accessories

System Highlights
Optics: infinity-corrected optical system, RMS-threaded objectives with 45 mm parfocal distance
Illumination: adjustable intensity LED (>50,000-hour life per light cube)
Light cubes (not included): broad selection of patented standard and specialty light cubes
Common light cubes include: DAPI (Ex 360 nm/Em 447 nm), GFP (Ex 470 nm/Em 525 nm), RFP (Ex 530 nm/Em 593 nm), Texas Red? (Ex 585 nm/Em 624), Cy5 (Ex 628 nm/Em 692 nm)
Contrast methods: fluorescence and transmitted light (brightfield & phase contrast)
Objective turret: 5-position, front-mounted control
Objectives (not included): wide selection of high-quality LWD and coverslip-corrected objectives available
Condenser: 3-position turret with brightfield and phase contrast annuli
Condenser working distance: 60 mm
Stage: mechanical 'glide' stage; X-Y axis fine-positioning controls: 28.3 mm (1.11') per rotation, 110 mm x 110 mm (4.3' x 4.3') range of motion; Z-axis focusing controls: 480 μm/rotation; interchangeable vessel holders are available for most common shapes and sizes
Focus mechanism: coaxial focus knobs with tension control
Course focus: 38 mm/rev
Fine focus: 0.2mm/rev, precision 0.002 mm
LCD display: 15-inch color, 1024 x 768 pixels, adjustable tilt
Camera: Sony ICX445 monochrome CCD, 1/3' 1280 x 960 pixels, 1.3 Megapixels
Image acquisition: onboard microprocessor, built-in software for image acquisition via mouse control
Captured images: 16-bit monochrome TIFF or PNG (12-bit dynamic range); 24-bit color TIFF or PNG; jpeg, bmp, 1280 x 960 pixels
Output ports: 3 USB and 1 DVI
Power supply: AC adapter with country-specific power cords; input 100-240 V, 50-60 Hz; output 12 VDC/4.15 A
Dimensions: operating height = 57.8 cm (22.75 in); storage/transport height = 32.4 cm (12.75 in); depth = 47.0 cm (18.5 in); width = 35.5 cm (14.0 in)
Weight: 15.3 kg (33.7 lbs)?


規(guī)格

Color:Transmitted Light
Data Output:BMP Files,?JPG Files,?PNG Files,?TIFF Files
Detection Method:Fluorescent
Dimensions:36 cm (14 in) (W) x 58 cm (23 in) (H) x 47 cm (19 in) (D)
Display Interface:15-inch color monitor,?Adjustable tilt
For Use With (Equipment):Fluorescence Microscope
Format:Specific Holder Attachments
Frequency:50?60 Hz
Input Voltage:100-240 VAC
Objectives:5 Objective Turret
Product Line:EVOS?
Product Size:1 each
Stage:Mechanical stage with X-Y axis fine-positioning controls
Weight:15.3 kg (33.7 lbs)


規(guī)格

Color:Transmitted Light
Data Output:BMP Files,?JPG Files,?PNG Files,?TIFF Files
Detection Method:Fluorescent
Dimensions:36 cm (14 in) (W) x 58 cm (23 in) (H) x 47 cm (19 in) (D)
Display Interface:15-inch color monitor,?Adjustable tilt
For Use With (Equipment):Fluorescence Microscope
Format:Specific Holder Attachments
Frequency:50?60 Hz
Input Voltage:100-240 VAC
Objectives:5 Objective Turret
Product Line:EVOS?
Product Size:1 each
Stage:Mechanical stage with X-Y axis fine-positioning controls
Weight:15.3 kg (33.7 lbs)


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