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zhlrrttrr 2009-03-18 10:12:57 457  瀏覽
  • 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. 展開

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  • 墜天使喬 2009-03-20 00:00:00
    乙酸乙酯( Quimis ,巴勒斯坦權力機構) ,甲醇( Quimis ,巴勒斯坦權力機構) ,仲丁醇(默克,GX液相色譜級) ,油酸(默克,額外純) ,過氧化氫(特羅斯, 70 % ,瓦特/ W型水溶液) , 氧化鋁為色譜法(鹽, 0.05-0.15毫米) ,氧化鋁進行柱層析(阿有機物,活性,酸性, 0.1-0.5毫米) ,鋁三仲丁醇 ( Aldrich公司, 99.99 % ) ,草酸(合成器,功率放大器) ,二正丁基醚(銨, “ 99 % )和大豆油(嘉吉)被用作收到。解決無水過氧化氫( 24 % ,瓦特/ W型)在乙酸乙酯制備過氧化氫水溶液( 70 % ,瓦特/ W型)的乙酸乙酯共沸蒸餾與院長斯塔克儀器[ 14 ] 該產品被確定的氣相色譜,質譜( GC - MS分析)使用的是惠普5890氣相色譜儀配備了美國蠟柱和接口與惠普5971A質譜儀。氦氣被用來作為載氣。類似的配備惠普Packard5890氣相色譜儀使用氮氣作為載氣和火焰離子化檢測器是用于產品量化的幫助下,校準曲線。

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  • alwaystantan 2009-03-19 00:00:00
    乙酸乙酯( Quimis ,巴勒斯坦權力機構) ,甲醇( Quimis ,巴勒斯坦權力機構) ,仲丁醇(默克,GX液相色譜級) ,油酸(默克,額外純) ,過氧化氫(特羅斯, 70 % ,瓦特/ W型水溶液) ,氧化鋁為色譜法(鹽, 0.05-0.15毫米) ,氧化鋁柱,色譜法(阿有機物,活性,酸性, 0.1-0.5毫米) ,鋁三秒丁醇(奧爾德里奇, 99.99 % ) ,草酸(合成器,功率放大器) ,二正丁基醚(銨, “ 99 % )和大豆油(嘉吉)被用作收到。解決無水過氧化氫( 24 % ,瓦特/ W型)在乙酸乙酯制備過氧化氫水溶液( 70 % ,瓦特/ W型)的乙酸乙酯共沸蒸餾與院長斯塔克儀器[ 14 ] 該產品被確定的氣相色譜,質譜( GC - MS法)使用1惠普5890氣相色譜儀配備了美國蠟柱和接口與惠普5971A質譜儀。氦氣被用來作為載氣,氦氣被用來作為載氣。類似的配備惠普Packard5890氣相色譜儀使用氮氣為載體,氣體和火焰離子化檢測器是用于產品量化的幫助下,校準曲線。 (僅供參考哈,你是學啥的,這翻譯這么麻煩,可累死我了?。。?/dd>

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  • CF云強菜鳥 2009-03-20 00:00:00
    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]. 乙酸乙酯(Quimis,p.a)、甲醇(Quimis,p.a)、仲丁醇(Merck,HPLC等級)、油酸(Merck,超純)過氧化氫(Interox, 70%,w/w水溶液)、氣相色譜用氧化鋁(Fluka,0.05-0.15mm)、用于柱層析的氧化鋁(Acros Organics,活化的,酸性的,0.1-0.5mm),三-仲丁醇(Aldrich, 99.99%)、草酸(Synth, p.a.)、二-n-丁醚(Fluka,>99.%)和大豆油(Cargill)被采用采納。無水過氧化氫在乙酸乙酯中的溶液(24%,w/w)由乙酸乙酯中的含水H2O2(70%, w/w)通過用Dean-Stark設備共沸精餾而制備【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. 產品用氣相色譜質譜反光鏡法(GC-MS)鑒定,用HP公司的5890氣相色譜儀配備AT-Wax毛細管柱,并與一臺HP公司的5971質譜儀接口。氦被用作載流氣體。一臺類似配備的HP5890 氣體色譜儀采用氮氣作為載流氣體,一臺氫火焰離子化檢測器被用于借助校準曲線檢驗產品的合格與否。

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繼續(xù)求翻譯
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. 展開
2009-03-18 10:12:57 457 3
文章繼續(xù)求翻譯1,生物/英語達人來幫忙!
Residues of malachite green (MG) were extracted from homogenized animal tissues with a mixture of McIlvaine buffer (pH 3.0)–acetonitrile, and purified over an aromatic sulfonic acid solid-phase extraction column followed by ... Residues of malachite green (MG) were extracted from homogenized animal tissues with a mixture of McIlvaine buffer (pH 3.0)–acetonitrile, and purified over an aromatic sulfonic acid solid-phase extraction column followed by HPLC or LC–ESI-MS–MS analysis. Ascorbic acid and N,N,N9,N9-tetramethyl-1,4-phenylenediamine dihydrochloride were added to reduce de-methylation of the dye. Responses were recorded at 620 nm (HPLC) or by multiple-reaction-monitoring (LC–MS–MS) after post-column oxidation using PbO2 . MG and its primary metabolite leuco-malachite green (LMG) were successfully determined at 2.5–2000 mg / kg in catfish, eel, rainbow trout, salmon, tropical prawns and turbot, with a limit of detection at 1 mg / kg (HPLC) and 0.2 mg / kg (LC–MS–MS) for both MG and LMG. Recoveries for LMG were between 86±15% (prawn) and 105±14% (eel). Freeze–thawing cycles, and storage at 4°C and -20°C affected the recovery of both MG and LMG. Analyses of eel, trout and (processed) salmon field samples collected at local retailers, fish-market and -shops demonstrated trace levels of MG-residues. A McIlvaine solution at pH 3.0 was prepared by mixing 18.9 ml 0.2 M sodium hydrogen phosphate and 81.1 ml 0.1 M citric acid, whereas these volumes were 62.5 and 37.5 ml, respectively, to obtain a McIlvaine solution at pH 6.0. The SPE-eluent was prepared just before use and consisted of a mixture of 2.5 ml 25% (m/v) ammonium hydroxide, 2.5 ml 1.0 mg/ml methanolic ascorbic acid and 45 ml methanol. The sample-solvent was composed, just before use, from 2.5 ml 1.0 mg/ml methanolic ascorbic acid, 20 ml 50 mM sodium perchlorate containing 25 mM sodium acetate and 25 mM 1-pentanesulfonic acid adjusted to pH 4.0 with acetic acid, and 27.5 ml acetonitrile. Chemicals and solutions containing the dyes were protected from light. Fish were bought at the fish market and local stores. Blank trout were collected from aquaria at Utrecht University (The Netherlands). Tropical prawns were collected by the Dutch Inspectorate for Health Protection and Veterinary Public Health. 展開
2008-03-26 21:06:11 877 3
求翻譯。。。。。。。。。。。
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. 展開
2008-06-09 10:41:10 400 1
求化學翻譯
Graphite powder (<20m), hydrazine, ammonia, N,Ndimethylformamide (DMF), dopamine, 0.01M phosphate buffered saline (PBS; 0.138M NaCl, 0.0027M KCl, pH 7.4), and ascorbic acid were purchased form Aldrich and used as received. Doubly disti... Graphite powder (<20m), hydrazine, ammonia, N,Ndimethylformamide (DMF), dopamine, 0.01M phosphate buffered saline (PBS; 0.138M NaCl, 0.0027M KCl, pH 7.4), and ascorbic acid were purchased form Aldrich and used as received. Doubly distilled water was used throughout the whole experiments. The data of cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectra were obtained with a CHI 660 electrochemical workstation (CH instruments, Austin, TX). The electrochemical cell consisted of GCE (3mm diameter, Bioanalytical Systems, Inc.) as working electrode, Ag/AgCl (Bioanalytical Systems, Inc.) as reference electrode, and platinum wire as counter electrode. The impedance data were fitted to an appropriate equivalent circuit using ZsimpWin 3.0 software (Echem Software). The Raman spectra of graphene were obtained by micro-Raman system equipped with a homemade sample stage, a monochromator (SPEX 500 M), and a CCD camera (Roger Scientific model 7346-001) with 514.5nm wavelength laser line. Graphene was characterized by field emission scanning electron microscope (SUPRA 55VP, Carl Zeiss) and atomic force microscope (NanostationII, Surface Imaging Systems). 展開
2012-03-12 11:00:58 425 2
文獻求翻譯
Since the formation of a titanacyclopropane en route to cyclopropylamines can only occur with alkylmagnesium halides that contain a b-hydrogen atom, Grignard reagents without b-hydrogens appeared to be the most promising reagents for th... Since the formation of a titanacyclopropane en route to cyclopropylamines can only occur with alkylmagnesium halides that contain a b-hydrogen atom, Grignard reagents without b-hydrogens appeared to be the most promising reagents for the synthesis of primary tert-alkylamines from nitriles (Scheme 1). Thus propionitrile (1a), phenylmagnesium bromide (2) and Ti(Oi-Pr)4 were chosen to optimize the reaction conditions. In the protocol for the synthesis of cyclopropylamines,10 Ti(Oi-Pr)4 is already present in the diethyl ether solution of a nitrile, before two equivalents of the Grignard reagent are added. As this did not appear to be optimal for the synthesis of primary tertalkylamines, the Grignard reagent was added before Ti(Oi-Pr)4. With 2 equivalents of PhMgBr, 0.1 equivalent of Ti(Oi-Pr)4, and 1 equivalent of propionitrile (1a), the primary tert-alkylamine 8a was not formed at all. With an equimolar quantity of Ti(Oi-Pr)4, the amine 8a was produced in a low yield (11%) but with 1 equivalent of Ti(Oi- Pr)4 and 3 equivalents of the Grignard reagent 2, a 60% yield of 8a was obtained. Monitoring of the reaction by workup of aliquots of the reaction mixture showed that the first addition of 2 to form the N-magnesio derivative of the corresponding imine was rapid, whereas the subsequent second addition of the Grignard reagent 2 required heating under reflux for up to 24 hours. In tetrahydrofuran instead of diethyl ether, the amine 8a was formed in a very low yield, if at all. 展開
2012-08-31 01:19:05 451 5
求韓語翻譯
3? ??然 ?? ?? ???? ? ?? ???? ??? ?? ??? ?? &... 3? ??然 ?? ?? ???? ? ?? ???? ??? ?? ??? ?? ??? ?? ??? ?? ????、 求準確翻譯 PS 3元催化劑是安裝在汽車排氣管上的 展開
2012-12-19 08:48:48 450 1
求翻譯文獻
Anionsarecommonlyfoundintheenvironmentandbiologicalsystems.Forinstance,fluorideiswidelyusedindentalcareapplicationsandexhibitsinhibitionofcertainenzymefunctions.1Inadditi... Anions are commonly found in the environment and biological systems. For instance, fluoride is widely used in dental care applications and exhibits inhibition of certain enzyme functions.1 In addition to playing a central role in biological regulation, chloride is also a major groundwater contaminant that can corrode steel and concrete.2 Thyroid hormone synthesis largely determines iodine content.3 Acetate is a possible tracer for malignancies and has been extensively investigated in prostate cancer and its metastases.4 Phosphate ion is biologically and environmentally significant.5 Cyanide exerts adverse effects on human health as well as environment at low concentrations. Determining anions concentration is thus of primary concern in many areas, including food processing, industry, and clinic analysis.6 However, hydrophilic anions, such as F- and Cl-, form strong hydrogen bonds with protic solvents. Therefore, developing fluorescent probes based on electrostatic interactions for anions functioning in polar protic solvents is both challenging and currently infeasible. 展開
2009-12-15 12:42:12 450 6
高分求高手翻譯,不要機械翻譯
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. 能翻譯多少都可以的 展開
2009-03-24 13:04:22 368 2
化工專業(yè)英語求翻譯
Hollow polymeric spheres have been attracting increasing interest because of their potential applications, which range from targeted drug delivery to advanced functional materi- als.[1,2] Because of their hollow core structure, such poly... Hollow polymeric spheres have been attracting increasing interest because of their potential applications, which range from targeted drug delivery to advanced functional materi- als.[1,2] Because of their hollow core structure, such polymeric spheres can encapsulate large quantities of guest moleculesD especially those spheres with functionalities within the empty coreDand release them at a later stage in a controlled man- ner. Although hollow polymeric spheres with dimensions in the micrometer and submicrometer regions are readily con- structedDby layer-by-layer deposition of polyelectrolytes onto a template core,[3±6] polymerizing monomers in lipid vesi- cles,[7,8] emulsion polymerization,[9,10] pH-induced micelliza- tion of a grafted copolymer,[11] and by the assembly of posi- tively charged polyelectrolytes and negatively charged nanoparticles[12]Dthe synthesis of hollow spheres 100 nm or less in size has only recently become the subject of research activity. Several different routes, such as the self-assembly of block copolymers in a selective solvent,[13,14] the deposition of polyelectrolytes on a decomplexable or soluble core,[15,16] and microemulsion (as well as miniemulsion) polymerization,[17,18] have been developed to form hollow polymeric nanospheres. Although some of these methods have been quite successful, these strategies require the core templates to be removed in order to create a hollow interior, or need large quantities of surfactants to form nanosized micelles. Furthermore, although the majority of the proposed applications of hollow nano- spheres or nanocapsules are concentrated in the biomedical field, most of the hollow polymeric spheres described to date are ill-suited for such purposes. Therefore, materials (in par- ticular for the surfaces of the hollow nanospheres) that are biocompatible, non-toxic, and sometimes also biodegradable, are highly desirable. Herein, we demonstrate a simple and di- rect method for fabricating hollow polymeric nanospheres with biocompatible and biodegradable macromolecules. In this approach, hollow polymeric nanospheres were formed in a completely aqueous system without the aid of surfactants, 展開
2013-11-13 05:23:50 487 1
求翻譯,謝絕機器翻譯
茶葉中農藥殘留的檢測摘要有機氯農藥的脂溶性強,容易在食物鏈中蓄積,Z終進入人體并對人體產生慢性毒害作用,動物實驗證實其有致畸、致癌作用。作為有機氯農藥的替代品之一,擬除蟲... 茶葉中農藥殘留的檢測 摘 要 有機氯農藥的脂溶性強,容易在食物鏈中蓄積,Z終進入人體并對人體產生慢性毒害作用,動物實驗證實其有致畸、致癌作用。作為有機氯農藥的替代品之一,擬除蟲菊酯類農藥在農業(yè)生產中得到了廣泛應用。這類農藥施用量較小、易生物降解、殘留期較短,對病毒、害蟲、雜草等具有很強的殺傷作用、但該類農藥也有一定的蓄積性,部分對人有致畸、致突變的作用。目前國內外茶葉中有機氯和擬除蟲菊酯類農藥的檢測主要采用氣相色譜法(GC)和氣相色譜-質譜法(GC-MS)。試樣中有機氯和擬除蟲菊酯農YY有機溶劑石油醚提取,經液液分配及層析凈化,用石油醚-乙酸乙酯(95+5)洗脫,收集凈化液,于旋轉蒸發(fā)儀上濃縮近干,石油醚溶解定容,氣相色譜-電子捕獲檢測器檢測,根據(jù)色譜峰的保留時間定性,外標法定量,檢測茶葉中有機氯農藥六六六、DDT和擬除蟲菊酯類農藥、氯氰菊酯、氯菊酯、氰戊菊酯、氟氰戊菊酯等。所建立方法的分析結果與外檢結果基本一致。這幾種農藥在0.0125-3.5000μg/mL范圍內線性良好,本方法的添加回收率在81.71%-112.41%之間,本方法具有溶劑使用量少、凈化效果好、操作簡便、快速、靈敏、準確、可靠等特點,用于貴州地區(qū)茶葉樣品中有機農藥殘留測定,獲得較好結果。可滿足茶葉中六六六、DDT、、氯氰菊酯、氯菊酯、氰戊菊酯、氟氰戊菊酯等多種農藥殘留檢測的需要。 關鍵詞:茶葉 氣相色譜 農藥殘留 有機氯 擬除蟲菊酯 展開
2012-05-28 17:34:18 276 2
求翻譯英文文獻
2.2. Material Characterizations. A field emission scanning electron microscope (SEM, JEOL 6701F) was used to investigate the morphologies, particle sizes of the samples. Transmission electron microscopy and elemental compositions of the ... 2.2. Material Characterizations. A field emission scanning electron microscope (SEM, JEOL 6701F) was used to investigate the morphologies, particle sizes of the samples. Transmission electron microscopy and elemental compositions of the samples were determined by JEM-2100F (JEOL) coupled with an energy-dispersive X-ray spectroscopy (EDX, Phoenix) system. Wide-angle and low-angle X-ray powder diffraction (XRD) of the as-obtained samples were recorded on a Rigaku D/max-2500 with Cu Kα radiation (λ = 1.540 56 ?) operated at 40 kV and 200 mA. Raman measurements were performed using a DXR from Thermo Scientific with a laser wavelength of 532 nm. To calculate the pore size distribution and pore volumes, the nitrogen absorption and desorption isotherms were measured at 77.3 K with an Autosorb-1 specific surface area analyzer from Quantachrome. The content of N in N-doped porous carbon was determined by NHC elemental analysis using Flash EA 1112. Thermogravimetric (TG) analysis of S/C composite was performed on TG/DTA 6300 in an N2 flow to obtain the S content in the composite. A four-contact method was applied to measure the powder electronic conductivity of porous carbons. The powder sample was pressed to disk at 4 MPa with two stainless-steel plungers, whose resistance was measured by a Keithley 2400 digital multimeter in fourwire mode. The conductivity of the sample was calculated according to the resistance and the size of the disk. Information of the surface elements was obtained by X-ray photoelectron spectroscopy (XPS) performed on the Thermo Scientific ESCALab 250Xi using 200 W monochromatic Al Kα radiation. The 500 μm X-ray spot was used for XPS analysis. The base pressure in the analysis chamber was about 3 × 10?10 mbar. All reported data of XPS binding energy are calibrated based on the hydrocarbon C 1s line at 284.8 eV from adventitious carbon. Spectra were fitted with Lorentzian?Gaussian functions and smart background using Thermo Avantage software. 展開
2014-12-28 15:14:51 571 1
急求翻譯畢業(yè)論文
我是婦科專業(yè)博士,我們學校要求畢業(yè)論文寫成雙語,即要求把中文的翻譯成英文,現(xiàn)急求專業(yè)翻譯人士,請大家提供這方面信息,非常感謝... 我是婦科專業(yè)博士,我們學校要求畢業(yè)論文寫成雙語,即要求把中文的翻譯成英文,現(xiàn)急求專業(yè)翻譯人士,請大家提供這方面信息,非常感謝 展開
2018-11-26 09:40:00 306 0
求日語 日文翻譯幫忙翻譯一下。。。萬分感謝
請求項2記載の透明硬脆材料のレーザ加工裝置において、前記半透過ミラー及び前記反射ミラーにおける凹面のそれぞれの焦點位置が、同位置となるよう配置したことを特徴とするレーザ加工裝置。
2014-03-16 13:43:20 637 3
求翻譯Cu2+-Selective Ratiometric and “Off-On”
Varioustransition-metalionsarecrucialforthelifeoforganisms.1Amongtheseisthecopperion,whichplaysacriticalroleasacatalyticcofactorforavarietyofmetalloenzymes,includingsuper... Various transition-metal ions are crucial for the life of organisms.1 Among these is the copper ion, which plays a critical role as a catalytic cofactor for a variety of metalloenzymes, including superoxide dismutase, cytochrome c oxidase, and tyrosinase. However, under overloading conditions, copper exhibits toxicity in that it causes neurodegenerative diseases (e.g., Alzheimer’s and Wilson’s diseases) probably by its involvement in the production of reactive oxygen species.2 Consequently, organisms tightly regulate internal concentrations of copper. Owing to the Janus-faced properties of copper in organisms, numerous efforts have been undertaken to develop efficient and selective methods to assess copper ions in cells and organisms. In addition,copper is a significant metal pollutant due to its widespread use. The toxicity of copper ions for humans is rather low compared to other heavy metals, but certain microorganisms are affected by even submicromolar concentrations of Cu2+.3 Even though fluorescent probes for copper ion have been extensively explored owing to biological significance of this metal ion,4 there are still only a few examples of “off-on” type sensors available in aqueous systems.5 Furthermore, only a few ratiometric fluorescent probes for Cu2+ have been found in the literature due the fluorescence quenching nature of paramagnetic Cu2+,6 and most of them were working only in pure organic solvents. Ratiometric fluorescent measurements observe changes in the ratio of the intensities of the emission at two wavelengths. Thus, ratiometric fluorescent sensors have an important feature that they can be used to evaluate the analyte concentration and provide built-in correction for environmental effects. 展開
2009-12-22 07:53:40 571 3
求翻譯,不要機器翻
All cell lines were grown in RPMI-1640 medium (GIBCO) supplemented with 10% heat-inactivated bovine serum, 2 nM L-glutamine, 105 IU/liter penicillin G, 100 mg/liter streptomycin and 10 mM HEPES, pH 7.4. Cells were kept at 37°C in a humidif... All cell lines were grown in RPMI-1640 medium (GIBCO) supplemented with 10% heat-inactivated bovine serum, 2 nM L-glutamine, 105 IU/liter penicillin G, 100 mg/liter streptomycin and 10 mM HEPES, pH 7.4. Cells were kept at 37°C in a humidified 5% CO2 incubator. 展開
2012-07-23 12:44:48 380 1
求翻譯,除濕機功能按鈕英文!
Z主要是模式那三個真的搞不明白。
2014-03-11 12:05:49 538 2
跪求(急求)幫忙翻譯一下
無機前處理室主要開展食品樣品中無機檢測進儀器前的預處理工作。通過向食品樣品中加入強氧化性酸,采用微波消解技術或電熱板加熱技術使被測無機組分從復雜的樣品中分離出來,除去對分... 無機前處理室主要開展食品樣品中無機檢測進儀器前的預處理工作。通過向食品樣品中加入強氧化性酸,采用微波消解技術或電熱板加熱技術使被測無機組分從復雜的樣品中分離出來,除去對分析測定有干擾的基本物質,制成便于測定的溶液形式。樣品的預處理過程都是在無機前處理室進行的。 主要儀器:ETHOS A微波消解儀、SD500電熱板、Mill-Q Advandage A10超純水儀等。 光譜室主要開展食品、飲用水等樣品中重金屬元素含量檢測工作,各類儀器針對不同的物質進行檢測有其各自的優(yōu)勢。原子吸收光譜儀耶拿ZEEnie-700系列儀器主要用于鉛、鎘、銅、鉻、錳、鋅、鐵、鈣、鎂、鉀、鈉等項目檢測,雙道原子熒光光度計吉天AFS-820a系列儀器主要用于砷、汞、錫等項目檢測。光譜分析技術已經被廣泛應用于食品和水質檢測、環(huán)境保護、醫(yī)藥衛(wèi)生等領域。 主要儀器:原子吸收光譜儀耶拿ZEEnie-700系列、雙道原子熒光光度計AFS-820a系列。 承檢項目:食品、飲用水中重金屬鉛、鎘、銅、鉻、錳、鋅、鐵、鈣、鎂、鉀、鈉、砷、汞、錫等。 要英文的謝謝 展開
2013-02-18 02:23:38 372 3
電子,通信類專業(yè)英語求人工翻譯,軟件翻譯的別來。
如題ThetermASICisoftenappliedtofull-customandsemi-customintegratedcircuits.Anotherclassofintegratedcircuitisthatofprogrammablelogic.Theearliestprogrammablelogicdevices(PL... 如題 The term ASIC is often applied to full-custom and semi-custom integrated circuits.Another class of integrated circuit is that of programmable logic.The earliest programmable logic devices(PLDs) were programmable logic arrays(PLAs).Like gate arrays,these consist of arrays of uncomitted logic,but unlike mask-programmable gate arrays,the configuration of the array is determined by applying a large(usually negative) voltage to individual connections. 展開
2009-12-04 01:55:39 349 2
急求翻譯 請幫忙翻譯一下這篇英文資料,急用?。。?!
Wells-BrookfieldCone/PlateRapidDeterminationOfAbsoluteViscosityIntroductionTheWells-BrookfieldCone/PlateViscometergivesresearchersasophisticatedinstrumentforroutinelydete... Wells-Brookfield Cone/Plate Rapid Determination Of Absolute Viscosity Introduction The Wells-Brookfield Cone/Plate Viscometer gives researchers a sophisticated instrument for routinely determining absolute viscosity of fluids in small sample volumes. Its cone and plate geometry provides the precision necessary for development of complete rheological data. Principle of Operation The Wells-Brookfield Cone/Plate Viscometer is a precise torque meter which is driven at discrete rotational speeds. The torque measuring system, which consists of a calibrated beryllium-copper spring connecting the drive mechanism to a rotating cone, senses the resistance to rotation caused by the presence of sample fluid between the cone and a stationary flat plate. The resistance to the rotation of the cone produces a torque that is proportional to the shear stress in the fluid. The amount of torque is indicated either on a dial or digital display, depending on model. This reading is easily converted to absolute centipoise units (mPa.s) from pre-calculated range charts. Alternatively, viscosity can be calculated from the known geometric constants of the cone, the rate of rotation, and the stress related torque. See Range Tables The correct relative position of cone and plate is obtained by following a simple mechanical procedure without the need for external gauges or supplementary instrumentation. The stationary plate forms the bottom of a sample cup which can be removed, filled with .5 ml to 2.0 ml of sample fluid (depending on cone in use), and remounted without disturbing the calibration. The sample cup is jacketed and has tube fittings for connection to a constant temperature circulating bath. The system is accurate to within ?.0% of the working range. Reproducibility is to within ?.2%. Working temperature range is from 0oC to 100oC. 展開
2018-11-17 09:10:28 461 0

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