extech 照度计

洁净室内照明系统所使用的灯具应选用造型简单、不易积尘、便于擦拭、易于消毒杀菌的灯具类型。光源宜采用高效荧光灯，应为吸顶明装。照明系统照度值应适中，一般能满足工况要求即可，过高的照度值不仅带来多余的能耗，也会使工作人员的视力受损，甚至影响某些检测设备传感器部件的正常工作。

澄明度检测仪适用于大输液、各类针剂和瓶装药液的澄明度检测，生产的仪器包含YY-III单面澄明度检测仪和YB-6便携式澄明度检测仪两款型号。该仪器照度可调、数字式电子照度计读数直观，稳定可靠。光源照度指标、黑色背景及检测白板均符合药典规定。采用三基色荧光灯、电子镇流器和遮光装置所组成的光路系统、消除频闪、提高了分辨率，减小视觉疲劳。

光照度的不同，对番荔枝的叶片生长、叶片发育结构、叶片光合能力和叶片光合色素含量都会产生一定的影响。光照度一般是太阳光给的，虽然现在很多地方可以实 行人工照明，但是大部分还是依赖于太阳光。在对光照度的研究中，我们使用光量子计来进行光量子的测定，因为光量子是直接反应光照强度的一个计量单位。另 外，还有温度照度记录仪，也可以测定光照度，其测定的结果以Lux为计量单位。

能几秒钟内在LED显示屏上产生精确的测量结果，进行快速评估。手持便携式的光谱照度计可用于评估照明设施和LED灯具的快速控制，甚至支持应用和销售工程师去定量突出现代照明系统。光谱照度计应用于高端实验室、研发和进料质量控制，为照明专业人员提供简单可靠的光谱辐射照度测量仪，为行业应用需求提供相应的解决方案。

澄明度检测仪采用了药典规定的三基色照度连续可调荧光灯和电子镇流器组成的光源系统。工作装置背景采用了遮光板，黑色背景，检测白板等提高了目检分辨能力与减小视觉疲劳。数字式电子照度计使用方便，稳定可靠，检测时间可以任意设定，并有声光报警功能。

Column: NanoChrom BP-5MS, 30m x 0.25mm x 0.25umCat. No.: G1525-3002 VWR No.: 10499-180Oven: 150℃ 4℃min to 275℃ hold载气：氢气（1.0ml/min）12,4,5,6-Tetrachloro-m-xylene(IS)12Dieldrin2α -BHC13p,p' -DDE3β -BHC14Endrin4γ -BHC15Endosulfan II5δ -BHC16p,p' -DDD6Heptachlor17Endrin aldehyde7Aldrin18Endosulfan sulfate8Heptachlor epoxide19p,p' -DDT9γ -Chlordane20Endrin ketone10Endosulfan I21Methoxychlor11α -Chlordane22Decachlorobiphenyl(IS)

Abstract. This study investigates the changes in radial micro-texture via Kearn’s f-factors during single cold pilger reductionof a titanium Ti-3-2.5 alloy as a result of strain path changes from tooling modifications. EBSD results confirm that thetexture intensity as well as the radial f-factors can be increased by modifications of pilgering tooling. In addition a switchbetween the secondary prism planes which lie normal to the pilger direction in the starting tube to primary prism planesafter pilgering has been observed.Material and ExperimentalThe tubes investigated were made from Ti alloy 3Al 2.5V, they were manufactured via hot extrusion and then cold pilgered.The cold pilger process configuration is schematically shown in Figure 1. Two strain paths, shown in the ‘Q‘ factor chart inFigure 2, were used in the manufactiure: texture minimised and texture maximised. They were annealed at 750oC beforebeing cold pilgered and for this investigation they were stress relieved at 530oC for 2 hours prior to EBSD examination.Specimens were extracted from two regions either side of the reduced tube as shown in the schematic Figure 2, mountedin conductive Bakelite and polished mechanically for EBSD examination. The final polish was carried out using vibratorypolishes using a mixture of 5:2 colloidal silica, hydrogen peroxide mixture. EBSD examination was conducted using aFEGSEM and OI EBSD Nordlys detector and AZtec Software.

复享光学辐照度光谱测试系统典型适用于LED、光源或其他辐射源的辐照度测量，运用标准光源，对辐照度光谱系统进行辐射定标，可提高辐射测量的的准确性。复享仪器PG2000-Pro是一款面阵背照式光谱仪，增强了对紫外波段的灵敏度，采用了高分辨光学平台，平衡光谱仪光学分辨率与灵敏度性能，是一款高灵敏度光纤光谱仪。

该技术文章解释了高辐照度紫外试验机如何提供更快的老化测试结果.耐候性是户外涂料的一个必要性能，因为户外暴露试验时间长，所以实验室加速测试被广泛应用于此行业。

A Vanquish Flex Quaternary UHPLC system was applied for the SEC analysis. This is a low dispersion, inert UHPLC, which can be used successfully for this type of application. For this analysis, pre-column dispersion was intentionally introduced to show the effects of dispersion in front of the column at different flow rates.

1.Gluten composition, gluten quality, and dough-mixing properties of high-yielding wheats derived from crosses between common and synthetic wheats2.Comparing Mixolab® parameters obtained with slow and faster dough-mixing test protocols

U.S. EPA 606规范了该类物质的测试方法，选用ChromCore 120 C18色谱柱，结合简便的乙腈/水系统进行梯度洗脱，在该色谱条件下，各组分均有良好的分离度和峰型，可用于这类化合物的分析检验。Column:ChromCore 120 C18, 3 μ mDimension:4.6 × 150 mmMobile phase:A）乙腈B）水Gradient:t (min)AB-56535065352802041000101000Flow rate:1 mL/minTemperature:30 ℃Injection:5 μ LDetection:UV 210 nmSamples: 1. Dimethyl phthalate（邻苯二甲酸二甲酯）2. Diethyl phthalate（邻苯二甲酸二乙酯）3. Di-n-butyl phthalate（邻苯二甲酸二正丁酯）4. Butyl benzyl phthalate（邻苯二甲酸丁苄酯）5. Bis(2-ethylhexyl) phthalate（邻苯二甲酸二(2-乙基己)酯）6. Di-n-octyl phthalate（邻苯二甲酸二正辛酯）

o-Dichlorobenzene was dried over anhydrous sodium sulfate and distilled prior to use.All reactions were performed in a commercial microwave reactor(XH-100A,100-1000W,Beijing Xianghu Science and Technology Development Co.Ltd,Beijing,P.R.China).The temperature of the reaction mixture was measured by an immersed platinum resistance thermometer.Melting points were measured on a melting point apparatus and are uncorrected.H NMR(200 or 300 MHz)and C NMR(50 or75MHz)spectra were obtained on an EI mass spectrometer.IR spectra were recorded on a FT-IR spectrometer with an OMNI sampler.TLC separations were performed on silica gel GF plates ,and the plates were visualized with UV light.

In this study, a workflow is presented that combines fast chromatography, using two sizes of monolithic columns,and high resolution Orbitrap mass spectrometry of intact,as well as reduced, rituximab, sequence verification by AIF,and multiplexed HCD top-down fragmentation,supplemented by a bottom-up approach.

AbstractThis application note describes two approaches for achieving robust, multiresidue pesticide analysis in 10 minutes by GC/MS/MS, while maintaining sufficient chromatographic resolution for the analysis of over 200 pesticides in spinach a challenging high chlorophyll, fresh matrix. First, the conventional 15 × 15 m (0.25 mm × 0.25 μm) midcolumn backflush configuration was used with an accelerated oven ramp, yielding an analysis time of 10 minutes. Second, a minibore 10 × 10 m (0.18 mm × 0.18 μm) midcolumn backflush configuration was used,enabling a fast 10-minute analysis time. The latter method was precisely scaled using the Agilent GC method translation technique. It was shown that midcolumn backflushing enabled method robustness and extended maintenance-free operation of the system by minimizing column trimming and source cleaning. Resultsdemonstrate that the Agilent 7000E and 7010C triple quadrupole GC/MS systems delivered excellent linearity over a concentration range of 0.1 to 1,000 parts perbillion (ppb). Method robustness was shown with 700 consecutive injections of a spinach extract, spiked with pesticides at 20 ppb, that spanned over 175 hours ofcontinuous running of the GC/TQ.

在“3060双碳目标”时代背景下，易科泰生态技术公司推出EcoTech® 多传感器碳源汇立体遥感监测方案，为我国早日实现双碳目标贡献力量。该方案由Ecodrone® 空基无人机遥感成像系统和PhenoPlot® 地面光谱成像监测系统组成，专为森林碳吸收量、植被碳氮损失与净汇、净光合作用、生物量、生态退化因子、生物多样性等碳源汇及生态系统监测研究领域提供全方位的空陆双基监测方案。

ATP生物荧光快速检测仪该设备为全新升级产品，大屏幕触摸显示屏，代替传统按键。操作采用生物化学反应方法检测ATP含量，ATP荧光检测仪基于萤火虫发光原理，利用“荧光素酶—荧光素体系”快速检测三磷酸腺苷（ATP）。ATP拭子含有可以裂解细胞膜的试剂，能将细胞内ATP释放出来，与试剂中含有的特异性酶发生反应，产生光，再用荧光照度计检测发光值，微生物的数量与发光值成正比，由于所有生物活细胞中含有恒量的ATP，所以ATP含量可以清晰地表明样品中微生物与其他生物残余的多少，用于判断卫生状况。

ATP荧光检测仪该设备为全新升级产品，大屏幕触摸显示屏，代替传统按键。操作采用生物化学反应方法检测ATP含量，ATP荧光检测仪基于萤火虫发光原理，利用“荧光素酶—荧光素体系”快速检测三磷酸腺苷（ATP）。ATP拭子含有可以裂解细胞膜的试剂，能将细胞内ATP释放出来，与试剂中含有的特异性酶发生反应，产生光，再用荧光照度计检测发光值，微生物的数量与发光值成正比，由于所有生物活细胞中含有恒量的ATP，所以ATP含量可以清晰地表明样品中微生物与其他生物残余的多少，用于判断卫生状况。

Column: NanoChrom BP-5MS, 30m x 0.25mm x 0.25umCat. No.: G1525-3002 VWR No.: 10499-180Oven: 150℃ 4℃min to 275℃ hold载气：氢气（1.0ml/min）12,4,5,6-Tetrachloro-m-xylene(IS)12Dieldrin2α -BHC13p,p' -DDE3β -BHC14Endrin4γ -BHC15Endosulfan II5δ -BHC16p,p' -DDD6Heptachlor17Endrin aldehyde7Aldrin18Endosulfan sulfate8Heptachlor epoxide19p,p' -DDT9γ -Chlordane20Endrin ketone10Endosulfan I21Methoxychlor11α -Chlordane22Decachlorobiphenyl(IS)

Monoclonal antibodies (mAbs) are currently the dominant class of protein therapeutics in the biopharmaceutical industry due to their high specificity to target antigens, long serum half-life in humans, and capabilities for use in the treatment of a wide range of ailments such as inflammatory diseases and cancer. During product expression and purification from host cells, formulation, and storage, mAbs may undergo various degradation processes, which may alter the safety, efficacy, and quality profile of the drug product. Consequently, a number of critical quality attributes (CQAs) must be monitored throughout drug development and production to ensure biotherapeutic substances are suitable for clinical use.

相比于索氏提取，时间更短，产率更高。Abstract:The longan (Dimocarpus Longan Lour.) peel was extracted with 95% ethanol employing microwave-assisted extraction and Soxhlet extraction method, the total phenolic content of microwave-assisted extract of Langan peel (MEL) and Soxhlet extract of Langan peel (SEL) reached 96.78 mg/g and 90.35 mg/g dry weight, respectively, expressed as pyrocatechol equivalents, which were quanti?ed using Folin–Ciocalteu reagent. Subsequently, antioxidant properties of two extracts were investigated employing various established systems in vitro including 2,20-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay, hydroxyl radical scavenging assay using a new resonance scattering (RS) method, reducing power and total antioxidant capacity. MEL and SEL showed excellent antioxidant in all test systems compared to synthetic antioxidant 2,6-di-ter-butyl-4-methylphenol (BHT) and the antioxidant activities of MEL were all superior to those of SEL. Furthermore, the suitability of MEL and SEL as substitute of BHT were determined in peanut oil, and the decrease of lipid oxidation were monitored using thiobarbituric acid-reactive substances (TBARS) assay. MEL and SEL treatment signi?cantly (P 0.05) reduced lipid oxidation in peanut oil compared to the control. No signi?cant differences (P ? 0:05T in lipid oxidation were detected between MEL, SEL and BHT samples of peanut oil.

Abstract—The palladium-catalyzed arylation of rac-(E)-3-acetoxy-1,3-diphenylprop-1-ene with arylboronic acids was studied under controlled microwave irradiation conditions. Avariety of different catalysts, bases, and solvents were explored in order to achieve optimum yields in the shortest possible reaction times. The best isolated yields were obtained using Pd2(dba)3$CHCl3/PPh3 as the catalytic system, potassium phosphate monohydrate as the base, and toluene/H2O as a solvent system. Microwave irradiation using 5 mol% of the palladium catalyst for 90 s (max. temp 170 C) generally afforded the cross-coupling products in good to excellent yields.

Column: NanoChrom BP-5MS, 30m x 0.25mm x 0.25umCat. No.: G1525-3002 VWR No.: 10499-180Oven: 150℃ 4℃min to 275℃ hold载气：氢气（1.0ml/min）12,4,5,6-Tetrachloro-m-xylene(IS)12Dieldrin2α -BHC13p,p' -DDE3β -BHC14Endrin4γ -BHC15Endosulfan II5δ -BHC16p,p' -DDD6Heptachlor17Endrin aldehyde7Aldrin18Endosulfan sulfate8Heptachlor epoxide19p,p' -DDT9γ -Chlordane20Endrin ketone10Endosulfan I21Methoxychlor11α -Chlordane22Decachlorobiphenyl(IS)

Column: NanoChrom BP-5MS, 30m x 0.25mm x 0.25umCat. No.: G1525-3002 VWR No.: 10499-180Oven: 150℃ 4℃min to 275℃ hold载气：氢气（1.0ml/min）12,4,5,6-Tetrachloro-m-xylene(IS)12Dieldrin2α -BHC13p,p' -DDE3β -BHC14Endrin4γ -BHC15Endosulfan II5δ -BHC16p,p' -DDD6Heptachlor17Endrin aldehyde7Aldrin18Endosulfan sulfate8Heptachlor epoxide19p,p' -DDT9γ -Chlordane20Endrin ketone10Endosulfan I21Methoxychlor11α -Chlordane22Decachlorobiphenyl(IS)

The quantification of a panel of antiepileptic drugs in human plasma has been implemented and analytically validated on a TSQ Quantum Access MAX mass spectrometer using the MassTox TDM Series A kit for antiepileptics from Chromsystems. The TSQ Quantum Access MAX mass spectrometer proved to have the proper sensitivity, accuracy, and precision for the application of this analytical method to clinical research.

In this work the unsteady-state contact angle at the interface between polymer melt and carbon black (CB) was measured. The transition of contact angle from an unsteady to a steady state can be divided into three stages, the unsteady thermo-stage, the wetting stage, and the reach of equilibrium contact angle. Subsequently, three critical indices, the unsteady heat-transfer period t0, the retardation time τ, and the contact angle at equilibrium state A∞ are defined herein. The decrease in contact angle against time can be simulated by an exponential decay that involves these three critical indices. Molten polypropylene (PP) and polystyrene (PS) have the smallest equilibrium angle A∞, followed by polybutylene terephthalate (PBT), and polymethyl methacrylate (PMMA) has the greatest angle. Interestingly, this order is strongly related to the solubility parameter of each polymer. The CB coated with sulfonated polyester slightly changes the equilibrium angle A∞, but drastically reduces the retardationtime τ for PP and PBT. This finding indicates that the CB, whose surface is modified by sulfonated polyester, can effectively reduce the compounding time of PP and polyester. Experimental results also reveal that reduce compact density slightly increases A∞ but barely affects τ. Furthermore, modifying PS with polybutadiene particles yields a high contact angle A∞ and a low τ value.

产品简介： 该设备为全新升级产品，大屏幕触摸显示屏，代替传统按键。操作采用生物化学反应方法检测ATP含量，ATP荧光检测仪基于萤火虫发光原理，利用“荧光素酶—荧光素体系”快速检测三磷酸腺苷（ATP）。ATP拭子含有可以裂解细胞膜的试剂，能将细胞内ATP释放出来，与试剂中含有的特异性酶发生反应，产生光，再用荧光照度计检测发光值，微生物的数量与发光值成正比，由于所有生物活细胞中含有恒量的ATP，所以ATP含量可以清晰地表明样品中微生物与其他生物残余的多少，用于判断卫生状况。仪器应用：恒美ATP荧光检测仪广泛应用于：细菌微生物检测、医药卫生、食品安全、市场执法、表面洁净度检测、医疗防疫、水质水政、生产线卫生、工业水处理、环保检测、海关出入境检疫及其他执法部门等多种行业。

An important part of the research and development of thin-film solar cells is the characterisation of microstructural andcompositional properties of the functional layers. For this purpose, energy-dispersive X-ray spectrometry (EDS) and electronbackscatter diffraction (EBSD) represent techniques which exhibit spatial resolutions on the nanometer scale but can be, atthe same time, applied on large areas of several square millimeters. The application of EDS and EBSD is demonstrated on thisexample of thin-film solar cells with Cu(In,Ga)Se2 absorber layers. While EDS provides elemental distributions even in layerswith a nominal thickness of 30-50 nm, EBSD gives not only information of average grain sizes, local orientations and grainboundaries. Moreover, strain distributions within individual grains can be calculated by the evaluation of EBSD patterns recordedon individual grains.

IntroductionIn Transmission Electron Microscopy (TEM) there are two ‘go to’ techniques for elemental analysis: EnergyDispersive X-ray Spectroscopy, (EDS), and Electron Energy Loss Spectroscopy, (EELS).EDS is a mature technique that can be used for most specimens. The intensity of generated X-raysis proportional to the mass thickness of the sample. However, this can become a limitation for verythin specimens or those comprising light elements. On the other hand, EELS is more suitable for thinsamples where the thickness is less than the inelastic mean free path of electrons in the material. EELSdoes, however, give high signal to noise for light elements. Simultaneous acquisition of both signals is apowerful tool for materials analysis.

Column: NanoChrom BP-5MS, 30m x 0.25mm x 0.25umCat. No.: G1525-3002 VWR No.: 10499-180Oven: 150℃ 4℃min to 275℃ hold载气：氢气（1.0ml/min）12,4,5,6-Tetrachloro-m-xylene(IS)12Dieldrin2α -BHC13p,p' -DDE3β -BHC14Endrin4γ -BHC15Endosulfan II5δ -BHC16p,p' -DDD6Heptachlor17Endrin aldehyde7Aldrin18Endosulfan sulfate8Heptachlor epoxide19p,p' -DDT9γ -Chlordane20Endrin ketone10Endosulfan I21Methoxychlor11α -Chlordane22Decachlorobiphenyl(IS)