机械翻译!! -仪器网

机械翻译!!

tianlong7589 2007-03-25 21:10:45 448 浏览

13.本系列仪器采用电流、电压双组取样并经单片处理后显示，其读数直观、准确。由于仪器采用了负载四线制取样，从面消除了负载导线电阻对电显示的影响。电路的电压限幅，使得实验更加安全，可靠。 16.采用古埃法（gu-ai method）研究分子结构，测量顺磁和逆... 13.本系列仪器采用电流、电压双组取样并经单片处理后显示，其读数直观、准确。由于仪器采用了负载四线制取样，从面消除了负载导线电阻对电显示的影响。电路的电压限幅，使得实验更加安全，可靠。 16.采用古埃法（gu-ai method）研究分子结构，测量顺磁和逆磁磁化率。主要结构有：电磁铁和恒流电源、数字式高斯计（霍尔效应）、安培计和伏特计、配有照明系统的控制盘。系统采用了PID电子调节，全数字电源（0~10A无级调节），无需水冷却，使得仪器动矿层运行更加稳定可靠，防止因操作不当而造成仪器损坏。 34. 本仪器由光学系统和信号处理系统两部分组成，它根据光拍频原理设计，通过光电转换检测，在普通示波器上同时观察和比较两束光的波形和相位，测量光程差和位相差，求得光速。采用新的分频、触发措施，能在示波器上观察到精确、清晰的波形。 35.本装置用霍尔效应的原理测量螺线管轴向磁场强度分布。能判断半导体载流子的符号，移开螺线管，可做共轭线圈实验。此装置由测定仪和专用电源两部分组成，实验仪上装有螺线管、霍尔元件、二维移动标尺及IM，IH，VH转换开关。专用电源提供霍尔元件工作电流IH，螺线管励磁电流IM以及对霍尔电压VH的测量。电流和电压的测量均采用3 1/2位数显表，测量精度高。翻出来后我再给分!一定会追加分!Z少50分!! 展开

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_狂丨人_ 2007-03-26 00:00:00

13.This series instrument adoption the electric current， electric voltage double set sampling combine through single slice processing behind show， it read number keep a view， accurate.Because the instrument adopted to load four lines system sampling， removed a load to lead the line influence of the electric resistance upon the electricity manifestation from the noodles.The electric voltage limit of the electric circuit， make the experiment be getting more safe， credibility. 16.Adopt ancient Ai method(gu-ai method) research member structure， measure agreeable Ci with negative Ci magnet susceptibility.The main structure have:Electromagnet and Heng galvanism source， numerical type Gauss account(the effect of Huo Er) and ammeter and volt account， have control dish of illuminate the system.The system adopted a PID electronics to regulate， total amount word power supply(0~10 As have no the class regulate)， do not need water cooling， make the instrument move a mineral layer movement more stable credibility， prevent°from because of operation not appropriate but result in the instrument damage. 34. This instrument is handled system by the optical system and the signal two part constitute， it according to only clap a Pin principle design， pass light electricity conversion examination， show a machine top to observe in the meantime in the commonness and the wave of twoer bunches of light form and mutually， measure light distance bad with differ and beg velocity of light. The adoption is new of cent Pin， trigger measure， can observe a precision in showing a machine， clear wave form. 35.This device measures a spiral line tube stalk to distribute toward the magnetic field strength with the principle of the effect of Huo Er.Can judge semi-conductor to carry sign of flow the son， move to open a spiral line tube， can do total yoke coil an experiment. This device from the measurement instrument and the appropriation power supply two part constitute， test an instrument to up have a spiral line tube， the component of Huo Er， two dimensions move surveyor's rod and IM， IH， VH conversion switch.The appropriation power supply provides the Huo Er the component work electric current IH， the spiral line tube Li magnetoelectricity flows IM and to the diagraph of Huo Er electric voltage VH.The diagraph of current and voltage all adopts 31/2 numbers show form and measure accuracy Gao.

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机械翻译!!: 13.本系列仪器采用电流、电压双组取样并经单片处理后显示，其读数直观、准确。由于仪器采用了负载四线制取样，从面消除了负载导线电阻对电显示的影响。电路的电压限幅，使得实验更加安全，可靠。 16.采用古埃法（gu-ai method）研究分子结构，测量顺磁和逆... 13.本系列仪器采用电流、电压双组取样并经单片处理后显示，其读数直观、准确。由于仪器采用了负载四线制取样，从面消除了负载导线电阻对电显示的影响。电路的电压限幅，使得实验更加安全，可靠。 16.采用古埃法（gu-ai method）研究分子结构，测量顺磁和逆磁磁化率。主要结构有：电磁铁和恒流电源、数字式高斯计（霍尔效应）、安培计和伏特计、配有照明系统的控制盘。系统采用了PID电子调节，全数字电源（0~10A无级调节），无需水冷却，使得仪器动矿层运行更加稳定可靠，防止因操作不当而造成仪器损坏。 34. 本仪器由光学系统和信号处理系统两部分组成，它根据光拍频原理设计，通过光电转换检测，在普通示波器上同时观察和比较两束光的波形和相位，测量光程差和位相差，求得光速。采用新的分频、触发措施，能在示波器上观察到精确、清晰的波形。 35.本装置用霍尔效应的原理测量螺线管轴向磁场强度分布。能判断半导体载流子的符号，移开螺线管，可做共轭线圈实验。此装置由测定仪和专用电源两部分组成，实验仪上装有螺线管、霍尔元件、二维移动标尺及IM，IH，VH转换开关。专用电源提供霍尔元件工作电流IH，螺线管励磁电流IM以及对霍尔电压VH的测量。电流和电压的测量均采用3 1/2位数显表，测量精度高。翻出来后我再给分!一定会追加分!Z少50分!! 展开

高分求高手翻译，不要机械翻译: Bimetallic dendrimer-encapsulated nanoparticles(DENs)are important materials，because they have demonstrated improvement in performance compared to the monometallic DENs in many systems when they are used as catalysts.This tutorial review fo... Bimetallic dendrimer-encapsulated nanoparticles(DENs)are important materials，because they have demonstrated improvement in performance compared to the monometallic DENs in many systems when they are used as catalysts.This tutorial review focuses on the recent research advances in bimetallic DENs with respect to their synthesis，characterization，and applications as catalysts.Bimetallic DENs can be made mainly via three routes:co-complexation，sequential loading，and partial displacement.The research in bimetallic DENs has been significantly promoted by the advancement of characterization instruments.The performances of bimetallic DENs as homogeneous and heterogeneous catalysts in organic synthesis have been compared with both monometallic DENs and their physical mixtures.It is concluded that the synergistic electronic effect in bimetallic nanoparticles enhances their catalytic activities. 能翻译多少都可以的展开

有关机械液压方面的英文资料及翻译，翻译的字数5000以上！谢谢！！:

求助：帮忙帮忙，机械英语NB的帮忙翻译下: The effect of beam diameter on the electron skirt in a high pressure scanning electron microscope R. Belkorissata， A. Kadouna， B. Khelifab， C. Mathieub，* aLaboratoire d’Elaboration et de Caracte´risation des Mate´riaux， Univ... The effect of beam diameter on the electron skirt in a high pressure scanning electron microscope R. Belkorissata， A. Kadouna， B. Khelifab， C. Mathieub，* aLaboratoire d’Elaboration et de Caracte´risation des Mate´riaux， Universite´ Djilali Liabe`s de Sidi Bel-Abbes， BP 89， 22000 Sidi Bel-Abbe`s， Algeria bCentre de Calcul et de Mode´lisation de Lens， University D’Artois， Faculte´ Jean Perrin， SP 18 Rue Jean Souvraz， 62307 Lens cedex， France Received 9 February 2004; accepted 19 March 2004 Abstract Helium gas and air are commonly used in the high pressure scanning electron microscope (HPSEM). The presence of a gaseous environment in the specimen chamber modifies the electron beam profile. In order to fully understand the beam-gas interaction， we have investigated the beam-diameter effect for two gases (helium and air) by Monte Carlo simulation. In this calculation， we have assumed that the electron beam is Gaussian and we have explored the influence of the nature of the gas at low voltage. When the beam diameter varies between 1 and 100 nm， there is no influence on the beam profile for these two gases. The resolving power of the HPSEM is not affected by the beamgas interaction. These theoretical results have been compared with experimental images obtained at low voltage under air and helium gases. The variation of image quality at low voltage has confirmed the interest of helium for use in a Field Emission Gun SEM (FEGSEM) in high pressure (or low vacuum) conditions. q 2004 Elsevier Ltd. All rights reserved. Keywords: High pressure scanning electron microscope; Monte Carlo; Electron scattering; Electron profile; Skirting 展开

翻译翻译，请高手帮我翻译一下这个说明: Followthesysteminstallationinstructionscarefullyandinthespecifiedorder.ThesoftwaremustbeinstalledonthecomputerbeforeconnectingtheUSBcable.2.1FacilitiesRequirementsFacilit... Follow the system installation instructions carefully and in the specified order. The software must be installed on the computer before connecting the USB cable. 2.1 Facilities Requirements Facilities requirements for the alpha-SE system are listed in Table 2-1 and the system dimensions are given in Fig. 2-1. As shown in Fig. 2-2， the alpha-SE tool requires a clear work area of 20 by 18 inches (500 by 460 mm)， excluding the operator computer. 2.2 Unpacking the Hardware Opening the Shipping Container Move the alpha-SE shipping container to the area where the tool will be installed. Open the container and remove the top and side pieces of packing foam. Carefully remove all smaller components from the shipping container， verifying that you received all components， as shown in Fig. 2-3. Finally， remove the alpha-SE ellipsometer and position it on your clear 20” by 18” (510 by 460 mm) workspace. Caution: The alpha-SE ellipsometer without sample chuck weighs approximately 37 lbs. (16 kg.). Please find an assistant to lift the alpha-SE unit out of the shipping carton and on to clear work surface. 展开

求助翻译: 问题一：请问“在GF254硅胶板上，取样点板，在254nm紫外光下观察结果”这句话该如何翻译？ZD是不知道“取样点板”怎么翻译问题二：麻烦高手帮忙翻译一下2Results2.1柱色谱分离结果The... 问题一：请问 “在GF254硅胶板上，取样点板，在254 nm紫外光下观察结果” 这句话该如何翻译？ ZD是不知道“取样点板”怎么翻译问题二：麻烦高手帮忙翻译一下 2 Results 2. 1 柱色谱分离结果 The results of separation by column chromatography 柱色谱分离过程中，氯仿∶甲醇95∶5和90∶10洗脱出来的流分经过反复的硅胶柱色谱分离纯化得到组分C3。 2. 2 薄层色谱检测结果 The results of Thin-layer chromatography. 组分C3在GF254硅胶板上展开后，可在254nm紫外灯下直观观测为单点，见图1。 2. 3 GX液相色谱分析和制备单体化合物对组分C3 进行GX液相制备，色谱图显示有4个色谱峰(见图2) ，分离效果较好，收集4个单峰组分，得到4个化合物1～4，对以上4个化合物进行GX液相分析，均为单峰，见图3～4。 3 化合物的结构鉴定通过制备液相收集得到4个化合物，对其中3个化合物进行结构鉴定: 化合物1，淡黄色晶体， UV λmax nm (logε) : 248 nm。E IMS，m / z 501. 3 [M + 1 ] + ，分子量为500。化合物1氢谱显示7个甲基信号;δ1. 02， 0. 93， 0. 78 ( each 3H， s) ， 0. 89 ( 3H， d， J =6. 4Hz) ， 1. 23， 1. 25 ( each 3H， d， J = 5. 2Hz) ， 1. 22(3H， s) ，一个连氧碳上的氢信号δ3. 23 (1H， dd， J= 10 Hz) ，符合三萜化合物的结构，可以证明化合物1为三萜类化合物。化合物2， UV λmax nm ( logε) : 250 nm。E IMS，m / z 515. 3 [M + 1 ] + ，分子量为514。化合物2的氢谱显示7个甲基信号δ0. 77， 0. 94， 1.01， 1. 22， 1. 23 (3H， s) ， 0. 82 (3H， d， 10. 2 Hz) ，一个连氧碳上的氢信号δ3. 22 ( 1H， dd， J = 10. 5Hz) ，一个甲氧基上的氢信号δ3. 66 (3H， s) ，符合三萜化合物的结构，可以证明化合物2为三萜化合物。化合物3， UV λmax nm ( logε) : 254 nm。EIMS，m / z 531. 2 [M + 1 ] + ，分子量为514。化合物2 的氢谱(见附录)显示7 个甲基信号δ0.78， 0. 82， 0. 87， 1. 03， 1. 24， 1. 31 ( 3H， s) ， 1. 17(3H， d， 6. 6 Hz) ，一个乙酰基上的氢信号2. 10(3H， s) ，一个甲氧基团的氢信号3. 68 (3H， s) ，符合三萜化合物的结构，可以证明化合物3为三萜化合物。化合物4结构较复杂，不能确定是三萜化合物。二楼的辛苦了，非常感谢你的回答。不过好像没有明白我的意思，而且有google之嫌。展开

帮忙翻译: AttachingtheSampleChuckYouwillneeda#2Phillipsscrewdriverforthisstep.FollowingthedetailsshowninFig.2-4，installthesamplechuckbyfirstaligningthepinsonthebottomofthesamplechu... Attaching the Sample Chuck You will need a #2 Phillips screwdriver for this step. Following the details shown in Fig. 2-4， install the sample chuck by first aligning the pins on the bottom of the sample chuck with the receptacles on the alpha- SE base. Then tighten the upper two captive thumb screws. Next， use the Phillips screwdriver to tighten the lower two captive screws. Don’t over tighten the screws! It will make it difficult to remove them in the future; just ensure that the screws are snug. Finally， connect the vacuum line from the sample chuck to the vacuum fitting on the alpha-SE base. Releasing the Z-stage Shipping Lock To access the Z-stage shipping lock， first loosen the captive screw on the lamp/shipping lock access door， then open the access door by rotating 180°， as shown in Fig. 2-5. To release the Z-stage shipping lock， stand in front of the ellipsometer and use your left hand to balance the weight of the Z-stage (you will feel it lift up slightly). It will be difficult to release the shipping lock if you apply too much or not enough upward force. Next， use your right hand to move the shipping lock to the operating position (to the right， see Fig. 2-6). If the lock is hard to move， you can use a tool to gain more leverage. The shipping lock will move about 1/3” [8mm] to the right. Checking the Lamp Check that the QTH lamp in fully seated in the lamp housing. The lamp is located behind the actuator screw (see Fig. 2-6) and has two white wires protruding from the back of the lamp. Simply push down on the lamp ensuring that the lamp is fully seated in the lamp housing. Rotate the lamp/shipping lock access door to the closed position and hand tighten the captive screw. 拒绝翻译软件，翻译软件我自己也会用不是用翻译软件我就看不懂，只是，上来找人翻译就是希望翻译出比较容易看懂，不需要自己对照就可以看的说明书，如果用翻译软件，根本就词不达意，还是要自己对着原文件核实既然用了那么多积分，就希望有相当的成果，如果用翻译软件混积分，那就是人品问题了还有，某些人不要不懂乱说混积分展开

求翻译。。。。。。。。。。。: During the preparation of the nano-products， these nano-units， such as nanoparticles， nanoclusters， nanowires and nanorods， can also self-assemble into the novel structural aggregates by several routes， including electron irradiation deposi... During the preparation of the nano-products， these nano-units， such as nanoparticles， nanoclusters， nanowires and nanorods， can also self-assemble into the novel structural aggregates by several routes， including electron irradiation deposition [19]， chemical vapor deposition [20]， laser vaporization-condensation [21]， charge transferring [22]， an organic reagent-assisted method [23]， solution-liquid-solid method [24] and catalytic vapor-liquid-solid growth [25]. With these routes， various nanoscale or microscale aggregates can demonstrate novel architectures， including tree-like， web-like， spherical， nanowire-like， network and fishbone-like aggregates. As a well-known method for producing the nanocapsules， however， arc-discharge has been rarely used to synthesize the aggregates self-assembled by the nanocapsules prepared simultaneously in arc-discharge. Nevertheless， it is possible that the arc-discharge can be developed into a new way to synthesize the aggregates. In the present work， we utilized arc-discharge technique with modified strategies， involving changing the hydrogen pressure， introducing gadolinium - aluminum alloy ingot as the anode and adjusting the elements percent of the anode according to their evaporation pressure， to synthesize a new type of nanocapsules， with intermetallic compound GdAl2 as core and amorphous Al2O3 as shell， which enlarge the family of the magnetic nanocapsules. At the same time， the regularly aligned three-dimensional macro-aggregates self-assembled by the nanocapsules without any template and catalyst were simultaneously synthesized in arc-discharge process. 展开

生物化学翻译: To show that HAX-1 degradation is part of the apoptotic process and any involvement Omi may have， we used the ucf-101 inhibitor. ucf-101 is a specific inhibitor of the proteolytic activity of Omi and has been described previously (13). When... To show that HAX-1 degradation is part of the apoptotic process and any involvement Omi may have， we used the ucf-101 inhibitor. ucf-101 is a specific inhibitor of the proteolytic activity of Omi and has been described previously (13). When HK-2 cells were treated with cisplatin in the presence of ucf-101， the percentage of apoptotic cells decreased and the inhibitor significantly blocked HAX-1 degradation. This effect was more pronounced when a higher concentration of the inhibitor was used. To confirm the specificity of the inhibitor in this system and exclude the possibility that another protease rather than Omi is involved in HAX-1 cleavage， we used cell lines derived from mnd2 mice (9). The parent cell line (mnd2-MSCV) derived from mouse embryo fibroblasts has no detectable Omi proteolytic activity (9). The same cell line has been transfected with wild type human Omi cDNA (mnd2-MSCV-Omi) and expresses high levels of active Omi protein (14). We found that in mnd2-MSCV cells， when induced to undergo apoptosis with various stimuli， the number of apoptotic cells was very low. Furthermore， no detectable cleavage of HAX-1 was observed. This is in contrast with the mnd2-MSCV-Omi cells where apoptosis was robust， and HAX-1 levels were inversely proportional to the degree of apoptosis. This experiment clearly shows that Omi is solely responsible for HAX-1 cleavage， which is essential for apoptosis under the conditions used in these experiments. HAX-1 subcellular localization depends on cell type (21， 30) and has been reported to be present in the mitochondria， cytoplasm， or plasma membrane (10， 21， 22， 30). We performed subcellular fractionation to investigate where HAX-1 cleavage by Omi takes place. We found that， in HEK293 cells， HAX-1 was predominantly present in the mitochondria， and this localization did not change in response to apoptotic stimuli. This suggests that Omi can initiate apoptosis in the mitochondria by cleaving HAX-1 protein. This is in accord with a recent study that shows Omi can induce apoptosis in human neutrophils treated with TNF- without being released from the mitochondria (7). Although several studies clearly define HAX-1 as an anti-apoptotic protein， the mechanism of its function is unknown. HAX-1 has sequence similarity to Bcl-2 family of proteins (10， 22). 展开

西班牙语翻译: 请帮忙翻译一句话，是用于公证书的：在2010年10月20日之前于ZG居住期间无任何刑事犯罪记录。希望翻译的比较准确，比较正式一点。

白度翻译能不能拍照翻译古文？:

软件翻译和人工翻译哪个好:

机械脱水: 请问除了压滤机之外，有什么仪器可以提供比较大的机械压力，我的样品很难干燥，想用一个滤袋装起来，然后把水压出来

继续求翻译: Ethylacetate(Quimis，p.a.)，methanol(Quimis，p.a.)，sec-butanol(Merck，HPLCgrade)，oleicacid(Merck，extrapure)，hydrogenperoxide(Interox，70%，w/waqueoussolution)，aluminumoxideforc... Ethyl acetate (Quimis， p.a.)， methanol (Quimis， p.a.)， sec- butanol (Merck， HPLC grade)， oleic acid (Merck， extra pure)， hydrogen peroxide (Interox， 70%， w/w aqueous solution)， aluminum oxide for chromatography (Fluka， 0.05–0.15 mm)， aluminum oxide for column chromatography (Acros Organics， activated， acidic， 0.1–0.5 mm)， aluminum tri-sec-butoxide (Aldrich， 99.99%)， oxalic acid (Synth， p.a.)， di-n-butyl ether (Fluka， >99%) and soybean oil (Cargill) were used as received. The solution of anhydrous hydrogen peroxide (24%， w/w) in ethyl acetate was prepared from aqueous H2O2 (70%， w/w) in ethyl acetate by azeotropic distillation with a Dean-Stark apparatus [14] The products were identified by gas chromatography–mass spectroscopy (GC–MS) using a Hewlett-Packard 5890 gas chromatograph equipped with a AT-Wax column and interfaced with a Hewlett-Packard 5971A mass spectrometer. Helium was used as the carrier gas. A similarly equipped Hewlett-Packard5890 gas chromatograph using nitrogen as the carrier gas and a flame ionization detector was used for product quantification， with the help of calibration curves. 展开

翻译~~高手进: 汉族占全国人口的94%，是主体民族，而且“汉语”就是“中文”。ZG有56个民族，如果要找出一个Z能代表整个国家的东西，shou选自然是占主体汉服。... 汉族占全国人口的94%，是主体民族，而且“汉语”就是“中文”。ZG有56个民族，如果要找出一个Z能代表整个国家的东西，shou选自然是占主体汉服。展开

翻译以下英文：: The standard error of the mean (SEM) is a measure of how far your sample mean is likely to be from the true population mean. The SEM is calculated by this equation:SEM=SD/N. With large samples， the SEM is always small. By itself， the SEM i... The standard error of the mean (SEM) is a measure of how far your sample mean is likely to be from the true population mean. The SEM is calculated by this equation:SEM=SD/N. With large samples， the SEM is always small. By itself， the SEM is difficult to interpret. It is easier to interpret the 95% confidence interval， which is calculated from the SEM. 展开

纳米材料翻译（4）: In this study the preparation of ultrafine powder of Bi2S3 by a reaction between bismuth octanoate and sulfur in organic solvent such as high boiling alcanes is reported. The first step was the preparation of bismuth octanoate. Bi(NO3)3Y... In this study the preparation of ultrafine powder of Bi2S3 by a reaction between bismuth octanoate and sulfur in organic solvent such as high boiling alcanes is reported. The first step was the preparation of bismuth octanoate. Bi(NO3)3⋅5H2O and octanic acid were used as the starting materials. The acid was reagent and solvent at the same time and was added in twice excess. After boiling the mixture of starting materials during 1 hour， the product was salted out by ethylacetate. The precipitate was filtered and dried in exxicator at room temperature.The second step was the synthesis of bismuth sulfide by boiling of bismuth octanoate and sulfur in decane during 2.5 hours. The dark grey precipitate was filtered and washed with hexane several times to remove the impurites. The product was dried in exxicator at room temperature. 展开

纳米材料翻译（6）: Such interest is well founded.Touted as the impetus for a 21st century industrial revolution， manufactured nanoscale materials (less than 100 nanometers) are being studied intensely by a variety of industries. Worldwide， governments are alr... Such interest is well founded.Touted as the impetus for a 21st century industrial revolution， manufactured nanoscale materials (less than 100 nanometers) are being studied intensely by a variety of industries. Worldwide， governments are already investing billions of dollars in nanotechnology; that figure almost certainly will surpass $1 trillion in the next 10 years. Perhaps the only thing that approaches nanotechnology's technological potential is the uncertainty surrounding its occupational health risks. Relatively little is known about the exposure patterns and toxicity levels of ultrafine materials. But with hundreds of thousands of workers expected to join an industry that likely will redefine nearly every aspect of manufacturing and processing in the coming years， it’s essential that IHs learn as much as they can about potential workplace safety issues related to nanotechnology. “This is an opportunity for IHs to be at the forefront of solving problems before they arise，” says Mark Hoover， a senior research scientist at NIOSH in Morgantown， W.Va.“It is certainly a better approach than having to react to a problem or perform a cleanup on short notice.” 展开

纳米材料翻译（3）: The preparation of ultrafine powder of bismuth sulfide The synthesis of binary metal sulfides has been the focus of attention because of their important physical and chemical properties [1， 2]， good commercial applications in semiconductor... The preparation of ultrafine powder of bismuth sulfide The synthesis of binary metal sulfides has been the focus of attention because of their important physical and chemical properties [1， 2]， good commercial applications in semiconductors， pigments， luminescence devices， solar cells， IR detectors and optical fiber， communications， modern thermoelectric coolers [3]. Bismuth sulfide (Bi2S3) is a direct band gap material with Eg of 1.3 eV [4] and useful for photodiode arrays of photovoltaics [5]. Usually， busmuth sulfide can be prepared by direct reaction of bismuth and sulfur vapor in a quartz vessel at high temperature [6]. The chemical deposition method was applied to prepare bismuth sulfide through reaction of bismuth salt complexed by triethanolamine or EDTA with an aqueous solution containing a sulfur sourse such as thioacetamide， thiourea， sodium thiosulphate， geseous H2S. However， the powders obtained through this route are mostly amorphous or poorly crystallized [7–10]. The thermal decomposition preparation of bismuth sulfide was also reported by thermal decomposition of bismuth dithiocarbamate complexes [11]， metal ethylxanthate [12]， Bi-thiourea complex [13]. However， all these methods required high temperature or else the final poducts contain some impurites. Some researches use nonagueous solutions for depostion of bismuth sulfide thin films， but they have got amorphous products [14， 15]. Yu and Qian reported thermal synthesis of Bi2S3 through a reaction of BiCl3 and thiourea in ethanol at 140 °C [16]. 展开

纳米材料翻译（8）: Symposium Spotlights the State of the Science Nanotechnology research may still be in its infancy， but indications are good that the field will be growing up fast in the coming years. This promising trend was evident at the second Interna... Symposium Spotlights the State of the Science Nanotechnology research may still be in its infancy， but indications are good that the field will be growing up fast in the coming years. This promising trend was evident at the second International Symposium on Nanotechnology and Occupational Health， which was held in Minneapolis in early October 2005. Sponsored by NIOSH， the Office of the Vice President for Research at the University of Minnesota and the Center for Biological and Environmental Nanotechnology at Rice University， the symposium showcased not only the progress that has been made in the study of nanotechnology’s workplace issues， but also the depth and breadth of questions that remain. Patrick O’Shaughnessy of the University of Iowa， Iowa City， considered the meeting “very productive. It brought together most of the players from health and safety. It was good to see the variety of academic， government and business people interested in ensuring that the health and safety topics and concerns are addressed as soon as possible. No one wants another asbestos problem to emerge.”He notes that several talks and poster sessions on toxicology showed data implying that nanoparticles tested may not be as reactive as first suspected. In addition， there was a general consensus that typical mass-based measurements will not be adequate when evaluating a workplace because of nanoparticles’ small size and low mass. “Interestingly， devices that measure particle surface area may be very useful because the particles have an extremely large surface-to-volume ratio， and therefore， a greater potential to react with lung tissue，” O’Shaughnessy says. Other topics of interest， adds Mark Hoover of NIOSH， Morgantown， W. Va.， included how to organize health and safety programs and resources to manage nanoparticles effectively and safely， personal protective equipment and filtration， as well as whether existing information about micrometer particles can be extrapolated to the nanometer range. “The evidence is still developing，” Hoover says， “but many people will do investigations with multiple metrics so we can be sure.”Hoover was also impressed with the symposium’s international flavor. “You had a lot of networking going on between U.S. scientists and their colleagues from the Pacific Rim， the European Union， Australia and New Zealand，” he says. “Everybody is eager to get up to speed with their colleagues’ research.” 展开

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