化學(xué)類的句子翻譯

付加生 2012-02-13 17:34:32 540 瀏覽

句子如下：An artifact of the sample preparation for XPS analysis was considered， but various procedures gave the same result. ZD在前半句，XPS為專有名詞--X射線光電子能譜求英化達(dá)人翻譯

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老末 2012-02-14 00:00:00

X射線光電子能譜可以用來(lái)準(zhǔn)備分析一個(gè)手工藝品（尤指有歷史或文化價(jià)值的）的樣本結(jié)果，但是很多方法都能得到相同的結(jié)果。希望以上答案能幫到您。

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東霞云霞 2012-02-18 00:00:00

做XPS分析需要采用人工制品，盡管各種程序不同，結(jié)果卻是一樣的。

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魚都可以飛啦 2012-02-14 00:00:00

人們考慮到了用于X光電子能譜分析的試樣圖譜中的偽跡，但是有多種步驟能夠造成這一結(jié)果。感覺這句話不全啊。反正我不覺得 artifact 是手工藝品。

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化學(xué)類的句子翻譯: 句子如下：An artifact of the sample preparation for XPS analysis was considered， but various procedures gave the same result. ZD在前半句，XPS為專有名詞--X射線光電子能譜求英化達(dá)人翻譯

一個(gè)英語(yǔ)句子的翻譯---在線等: it is no good crying over spilt milk. 覆水難收請(qǐng)直譯這個(gè)句子。謝謝

測(cè)序方面的生物專業(yè)英文句子翻譯: The cDNA and gene sequences currently available includes 31，741 unique sequences assembled from 217，519 high quality 454 sequencing reads.這句怎么翻譯？尤其是high quality 454 sequencing reads具體怎么翻譯

求化學(xué)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

翻譯英文~專業(yè)類的: Whilegraphene，acarbon-basedtwo-dimensionalnanomaterials，hasreceivedanupsurgeofinterest，[1]self-assemblyofsmallorganicandorganometallicmoleculesinto2Dnanostructurescouldal... While graphene， a carbon-based two-dimensional nanomaterials， has received an upsurge of interest，[1] self-assembly of small organic and organometallic molecules into 2D nanostructures could also be harnessed to develop new classes of functional supramolecular nanomaterials.[2] In principle， quasi-2D lamellae or nanosheets are planar structures having a thickness less than 100 nm and lateral dimensions a few orders of magnitude greater than their thickness. Control over the bilateral intermolecular noncovalent interactions is anticipated to organize small molecules into regular 2D nanostructures， which has been a formidable challenge yet to be achieved. Recently， Shelnutt and co-workers obtained discrete porphyrin nanosheets reprecipitated from their solutions;[3] Sathish and co-workers constructed hexagonal C60 nanosheets using a liquid–liquid interfacial precipitation method;[4] the groups of Yao[5] and Hu[6] prepared singlecrystalline nanosheets of polycyclic aromatics using a surfactant- assisted reprecipitation and a physical vapor transporting method， respectively; and Zhang and co-workers suggested that molecules with intramolecular charge-transfer dipole moments could be grown into quasi-2D nanostructures.[7] Moreover， some amphiphiles and organogelators were found to self-organize into sheet-like nanostructures in contact with solvents.[8] Despite these advances， templateand surfactant-free synthesis of free-standing， crystalline， and optoelectronically active nanosheets from small molecules remains elusive. 展開

有會(huì)翻譯化學(xué)的嗎: Transmission electron microscopy (TEM) was used to identify and characterize carbon nanotubes. Specimens for TEM observation were prepared by ultra-sonicating carbon nanotubes in alcohol， then dipping a TEM sample grid into the dispersi... Transmission electron microscopy (TEM) was used to identify and characterize carbon nanotubes. Specimens for TEM observation were prepared by ultra-sonicating carbon nanotubes in alcohol， then dipping a TEM sample grid into the dispersion. Nitrogen adsorption isotherms of nanotube samples were measured at 77.5 K by an ASAP 2010 volumetric sorption analyzer (Micromeritics) with addi- tional options for the micropore analysis. The volume of adsorbed nitrogen at 77.5 K was measured as a function of 25 the equilibrium pressure over a range from 10 Torr to the saturation vapor pressure. Prior to adsorption measure- ments， samples were outgassed under vacuum at 573 K for 3 h. The pore size distributions (PSD) of samples were obtained by analyzing the isotherm with BJH equation. To check any significant chemical modification， the raw and conpurified sample was analyzed by X-ray photoelectron spectroscopy (XPS)， respectively. Photoelectron spectra of samples were measured using a PHI5300 X-ray photoelec- tron spectrometer (PE Corp.) with Al Ka source. The spectra were recorded at room temperature under high vacuum. All binding energies (BE) were corrected for sample charging using the BE of C as an external 1s standard (284.6 eV). All data were analyzed with the aid of an Applle Series 3500. Thermo-gravimetric analysis (TGA) was used to determine the content of the Fe catalyst in the sample， and a CAHN2000 thermo-gravimetric analyzer was used to characterize weight loss during oxidation of the samples in air with heating to 11008C at a rate of 108C/min. 展開

防毒面具的句子:

脂類的化學(xué)結(jié)構(gòu):

化學(xué)專業(yè)英語(yǔ)翻譯不要翻譯工具: D，L252單取代海因是工業(yè)生產(chǎn)D2氨基酸的重要前體[1～3]。海因酶具有底物特異性，D2海因酶(EC3151212)可轉(zhuǎn)化外消旋的D，L252單取代海因中的D型消旋體成為D2N2氨甲酰氨基酸，剩余的L252單取... D ，L252單取代海因是工業(yè)生產(chǎn) D2氨基酸的重要前體[1～3 ]。海因酶具有底物特異性，D2海因酶(EC 3151212)可轉(zhuǎn)化外消旋的D ，L252單取代海因中的D型消旋體成為D2N2氨甲酰氨基酸，剩余的L252單取代海因由于完全不被 D2海因酶所作用，如圖 1所示，先進(jìn)行消旋，從而使得 D ，L2海因完全轉(zhuǎn)化為光學(xué)純的 D2N2氨甲酰氨基酸，并進(jìn)一步被轉(zhuǎn)化為D2氨基酸。因此，52單取代海因的自發(fā)消旋成為L(zhǎng)2或D2N2氨甲酰氨基酸生產(chǎn)中的一個(gè)重要的步驟。若海因的自發(fā)消旋速率遠(yuǎn)低于海因水解酶的水解速率，則海因的消旋將成為D2N2氨甲酰氨基酸生產(chǎn)中的一個(gè)限速步驟。目前關(guān)于 52單取代海因的消旋的文獻(xiàn)非常少，海因消旋的細(xì)節(jié)問題也沒有被完全揭示。 1 材料與方法 111 實(shí)驗(yàn)材料 L2丙氨酸(國(guó)家生化工程ZX) 、 L2苯丙氨酸(國(guó)家生化工程ZX) 、氰酸鈉(江都化工廠) ，其他試劑為國(guó)產(chǎn)分析純?cè)噭?112 實(shí)驗(yàn)方法 11211 52取代海因衍生物的制備采用Henze2Speer法[4～5 ]進(jìn)行52取代海因衍生物的制備: 反應(yīng)溫度為60～80 ℃。反應(yīng)6 h后，加入鹽酸酸化，繼續(xù)加熱 8 h ，冷卻后過濾得到的固體用酒精和水的混合溶液重結(jié)晶，得到無(wú)色晶狀目的產(chǎn)物。因使用的氨基酸不同，反應(yīng)條件略有變化，產(chǎn)率一般為40 %～80 % ，所得的52取代海因具有和底物氨基酸相同的旋光方向。 11212 海因衍生物的消旋 a.精確稱量41000 g L252甲基海因，溶解于蒸餾水中，定容至250 mL ，測(cè)定其旋光度，并以此值為未消旋化的起始數(shù)據(jù)。 b.用 6 mol/ L 的 NaOH溶液調(diào)整海因溶液 pH值達(dá)810 ，90 ℃水浴2 h ，于旋光儀上測(cè)定其旋光度。 c.同 b ，依次調(diào)節(jié)溶液pH值為710、 810、 910 ，分別測(cè)定其旋光度。 d.同 b ，依次于50 ℃水浴中及室溫下恒溫2 h ，分別測(cè)定其旋光度，并與起始數(shù)據(jù)對(duì)比，計(jì)算消旋比 r ( %) :r =αt/α0 ，其中αt 為 t 時(shí)間溶液的旋光度，α0為溶液初始旋光度。 11213 海因的堿解精確稱量41000 g L252甲基海因，溶解于蒸餾水中，定容至 250 mL ，用 NaOH溶液和鹽酸分別調(diào)至pH = 2、 8、 12 ， 90 ℃水浴反應(yīng)4 h ，中間取樣測(cè)定其N2氨甲酰丙氨酸濃度。 11214 海因的轉(zhuǎn)化采用012 %的海因溶液，按 w (底物)∶ w (菌泥)= 1∶ 5的比例，于pH 915 ，溫度40 ℃下進(jìn)行轉(zhuǎn)化。取樣:取樣10 mL ，加入 5 mL 三停止反應(yīng) ，搖勻，放冰箱待測(cè)。 3 結(jié) 論 311 海因的消旋遵循本文所提出的碳負(fù)離子理論，其消旋過程為一級(jí)反應(yīng)動(dòng)力學(xué)過程。由海因消旋的半衰期可看出提高溫度和pH對(duì)海因的消旋均有利，但pH過高的情況下海因則會(huì)發(fā)生堿解反應(yīng)從而造成損失。 312 本文采用的海因轉(zhuǎn)化酶系中所含為 D2海因酶，對(duì)D2海因的轉(zhuǎn)化活性非常高，由此可見，如若采用的轉(zhuǎn)化體系中沒有消旋酶的存在，則海因的消旋成為海因酶轉(zhuǎn)化生產(chǎn)光學(xué)活性氨基酸的一個(gè)限速步驟。展開

關(guān)于鹽酸的句子:

關(guān)于冰點(diǎn)的句子:

化學(xué)專業(yè)英語(yǔ)翻譯懂的翻譯下謝謝: The X-ray diffraction (XRD) pattern was obtained on a Thermo ARL XTRA X-ray diffractometer with Cu K radiation ì 1.54178 ?). In situ XRD characterization was performed n a high-temperature attachment of the X-ray diffractometer. ... The X-ray diffraction (XRD) pattern was obtained on a Thermo ARL XTRA X-ray diffractometer with Cu K radiation ì 1.54178 ?). In situ XRD characterization was performed n a high-temperature attachment of the X-ray diffractometer. Transmission electron microscopy (TEM) observation was performed with a JEOL JEM 2010 high-resolution transmission electron microscope (HRTEM) operated at 200 kV. The UV vis diffuse reflectance spectrum (DRS) was obtained from a Perkin-Elmer Lambda 900 UV vis spectroscopy machine. The precursor was characterized by Fourier transform infrared (FT- R) spectroscopy on a Perkin-Elmer Spectrum One FT-IR machine by using the KBr pellets method. 展開

漢譯英句子在線翻譯: 納氏試劑光度法測(cè)定氨氮影響因素的探討摘要：氨氮以游離氨或銨鹽形式存在于水中。測(cè)定氨氮的方法通常有納氏比色法、氣相分子吸收法、電極法等。納氏試劑比色法有操作簡(jiǎn)便、靈敏等特點(diǎn)。本文提出用納氏試劑光度法測(cè)定氨氮的常見問題及解決方法。關(guān)鍵詞：納... 納氏試劑光度法測(cè)定氨氮影響因素的探討摘要：氨氮以游離氨或銨鹽形式存在于水中。測(cè)定氨氮的方法通常有納氏比色法、氣相分子吸收法、電極法等。納氏試劑比色法有操作簡(jiǎn)便、靈敏等特點(diǎn)。本文提出用納氏試劑光度法測(cè)定氨氮的常見問題及解決方法。關(guān)鍵詞：納氏試劑光度法；氨氮；影響因素展開

請(qǐng)高手幫忙翻譯化學(xué)名詞，急需~~~~: 以下的技術(shù)指標(biāo)用語(yǔ)都是關(guān)于PVC顆粒的，請(qǐng)知道的幫忙準(zhǔn)確地翻譯~~~謝謝VICATPOINTHARDNESSTENSILESTRENGTHYIELDPOINTELONGATIONATBREAKFLEXURALMODULUSIMPACTSTRENGTHINFLAMMABILITYA... 以下的技術(shù)指標(biāo)用語(yǔ)都是關(guān)于PVC顆粒的，請(qǐng)知道的幫忙準(zhǔn)確地翻譯~~~謝謝 VICAT POINT HARDNESS TENSILE STRENGTH YIELD POINT ELONGATION AT BREAK FLEXURAL MODULUS IMPACT STRENGTH INFLAMMABILITY AV.A.P. IMPURITY PARTICLE NUMBER VOLATILES（INCL WATER） BULK DENSITY SIEVE RATIO “FISH EYE”NUMBER UNIT/400c㎡ RESIDUAL VCM PPM 展開

贊美天平山的句子:

贊美一朵荷花的句子:

抗球蟲藥物的化學(xué)類:

化學(xué)專業(yè)英語(yǔ)·翻譯·謝\(^o^)/YES！: Fig. 1 illustrates the microstructure and surface morphology of samples which include the bare substrate， the fluorinated with and without CeO2 thin film. Fig. 1a shows the initial surface state of the polished bare substrate. Some fine ste... Fig. 1 illustrates the microstructure and surface morphology of samples which include the bare substrate， the fluorinated with and without CeO2 thin film. Fig. 1a shows the initial surface state of the polished bare substrate. Some fine steaks resulting from the polishing progress are visible in the image. The surface is considerably rough and the activity of surface for magnesium alloy is various from sample to sample and within the same sample due to the presence of different phases [24，25]. In Fig. 1b， the micrograph was taken when the sample was fluorinated in the 20% HF for 20 h. There are a large number of pores and cracks on the surface of this sample; however， we cannot find the presence of remarked grinding scratches originated from the sample preparation on the surface in contrast with the bare substrate. It is well known that the magnesium alloy reacts with HF to form the fluoride coating via displacement reaction and the fluoride is insoluble， thus form a barrier on the surface of magnesium alloy. The pores and cracks distributed uneven also suggest that the activities on the surface of magnesium alloy are not very identical. The SEM image of the fluorinated sample with CeO2 thin film is shown in Fig. 1c. As can be seen from this image， most of the pores and cracks existed on the surface of the fluorinated sample have disappeared which is ascribed to the presence of CeO2 thin film. Moreover， the surface of CeO2 thin film is more uniform and more compact than that of the fluorinated sample， and this may explain why this kind of samples is the best corrosion resistant. XPS analysis is performed aiming at identifying the chemical composition of the film and the typical survey scan spectra are shown in Fig. 2. The main element peaks of Mg， C， O， F and Ce are shown in the spectra. A significant amount of carbon is present on the surface of the sample due to some contaminant that originates from the polishing， cleaning and heat-treatment procedure; moreover， there may be some remnant since the deficiently burning for celloidin during the heat-treatment. There are three peaks in the survey scan spectra as follows: Mg 2p3/2 at about 50 eV， Mg 2s at about 88 eV and Mg Auger peak at about 301 eV. The peak of Mg 2p around 50 eV is shown in Fig. 2 which reveals only one peak at 50.2 eV belonging to Mg 2p being the fingerprint for Mg2+ in the transitional region. Hence， it is most probable that the presence of Mg in the coating is a result of the formation of MgF2 in the course of the fluorinated process and the formation of MgO during the heat-treatment. Both the main components of O 1s peak located at 530.6 eV and the F 1s peak located at 684.7 eV give the evidence that the major states are MgO and MgF2. It is found that almost a pure Ce(IV) state in the spectrum of CeO2 and this is similar to these reported by ?koda et al. [26]. 展開

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