In the one half part, according to the strontium nature, thermodynamic calculation of correlative reaction and the principle of the vacuum aluminothermy reduction process, with the laboratory findings of preparation strontium by vacuum aluminothermy reduction compared and analyzed in different parameter conditions, a variety of factors which effect the decomposition rate of SrCO_3 and the percent reduction of strontia are gotten out. The factors include that the decomposition rate of SrCO_3 is influenced by different addition and pressure. They also include that the percent reduction of strontia is influenced by excess coefficient of reducing agent aluminium powder, the particle size of raw material or reducing agent, the pressure of barbecuing, temperature and reduction time. According to those, we can draw the conclusion as follows:(1) Decomposition temperature of SrCO_3 is decreased by adding carbon and alumina in different degree.(2) With quantitative carbon added under the vacuum condition, the decomposition temperature of SrCO_3 is decreased obviously, which can fall 150℃ compared with atmospheric pressure.(3) In keeping 1150℃ of 2.5h, under the 5Pa vacuum condition, the decomposition rate of SrCO_3 nearly keeps in 99% steadily.

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The results show that the oxidization weight increasing and oxidation time follow the parabolic law at 800℃, no surface oxidation film desquamates, and the oxidation rate is stable. While at boot, the oxidation kinetic curves approximately follow the parabolic law, oxide films begin to desquamate lightly and thickening, and the mass gains are about four times as those at 800℃.

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Said lead tungstate crystal comprises tungsten oxide, lead monoxide, ytterbium oxide and zinc oxide; the molar ratio between tungsten oxide and lead monoxide is 1: 1, the doping amount of ytterbium oxide is 50 -300 ppm of the total weight of tungsten oxide and lead monoxide, the doping amount of zinc oxide is 50 -1050 ppm of the total weight of tungsten oxide and lead monoxide.

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Further oxidation treatment or reduction treatment of molybdenum dioxide nanowire arrays resulted in molybdenum trioxide nanowire arrays and molybdenum nanowire arrays. We fabricated WO3 nanowire arrays successfully by further oxidizing W18O49 nanowire arrays. Based on the vertical aligned zinc oxide nanowire arrays, we prepared the aligned zinc oxide/silicon core-shell nanowire arrays, zinc oxide nanowire-zinc silicate nanotube heterojunction arrays and zinc silicate nanotube arrays by adjusting the size of the templates as well as the annealing temperature.

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The influence of different assembled condition such as assembly method, concentration of zirconium source and pH value on the effectiveness of assembly were evaluated via DSC-TG, FT-IR, Uv-vis and SAXRD et al. It showed that the assembly effectivness of uncalcined 3 Si/Zr_10# sample was best.c The optical characteristic, which including light-conduction in infrared band and polarity in visible band, of dip-coating film and membrane assembled zirconia after processing parameters of assembly optimized were observed via FT-IR and Uv-vis. The polarity was characterized by polarizing angle through calculation from light-transmittance, light-reflectance and fresnel coefficient. qualitative analysis showed that the polarity of Si/Zr_10 # dip-coating film assembled was best.d Adopting zirconium oxychloride as zirconium source, CTAB as template, employing different CTAB adding sequence, two mesoporous zirconia samples were prepared. The template effect of two samples was discussed. It showed that the effect of the sample which CTAB adding sequence was same as mesoporous silica film was better. The light-conduction in infrared band of these samples was also studied, which offered comparison to the polarity of zirconium dioxide assembled within mesopore.

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Compared with that of 3Cr13 alloy, the oxidation resistance of the composites containing 5 vol.％TiC particle was improved greatly at 850℃, but the improvement was relatively limited at 950℃. But the oxidation resistance of 1Cr18Ni9 composites containing 5 vol.％ TiC particle was obviously improved at 950℃, and at 850℃ the improvement is not large. The TiC particle can improve the oxidation resistance mainly was by developing the oxidation selectiveness of the Cr element as to change the phase constitution of the oxidation film, to alleviate the production of the stress in the oxidation film and to improve the cohesive force of the oxidation film or matrix interface and the chemical combination of the oxidation film.

與3Cr13合金相比免费看操逼黄片av，含5％volTiC顆粒的復(fù)合材料在850℃的抗氧化性能得到大幅度提高亚洲欧美啊啊啊啊久久久，而在950℃復(fù)合材料的抗氧化性能提高作用卻是有限的；與1Cr18Ni9合金相比亚洲一区二区视频在线免费视频，含5％volTiC顆粒的復(fù)合材料在850℃的抗氧化性能略有提高欧美操屄，而950℃復(fù)合材料的抗氧化性能提高卻是明顯的；TiC顆猎谙吖劭垂廊槭悠担可以提高兩種基體合金抗氧化性能外国熟妇性交，主要是通過促進Cr的選擇性氧化人人起碰人人，進而改變氧化膜的相組成、減緩氧化膜內(nèi)應(yīng)力的產(chǎn)生黄色激情视频网站、增加氧化膜/基體界面凝聚力及提高氧化膜化學(xué)結(jié)合力而實現(xiàn)的。

In this thesis, three major achievements were made in theoretical study: conditions and rules for preparing nano-powders by chemical precipitation are analyzed from the point of view of thermodynamics and kinetics, the principle, standards and experimental method for the aqueous dispersion of nano-scaled metal oxide powders were proposed and verified, mathematical model of nano-filming addition of dopants by chemical coprecipitation was established. In experimental research, nm-ZnO, nm-Bi〓O〓, nm-Co〓O〓 and nm-MnO powder with spherical shape, narrow particle size distribution and small particle size were prepared successfully, highly stable and dispersive aqueous suspensoid of nm-ZnO, nm-TiO〓, nm-Co〓O〓 and nm-MnO powder were prepared successfully and surface modification on these nano-powders was also achieved, 0-3 nanocomposite ZnO varistors with nm-ZnO, nm-TiO〓and nm-MnO respectively were prepared successfully by conventional mechanical attrition, and exhibited much better electrical properties than those of conventional varistors.

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Six experimental stages were designed in our procedure, those are:(1) metabolite recovery and tested sample preparation: the metabolites were recovered by Amberlite XAD-2 absorption, followed by MeOH elution and solvent concentration;(2) antioxidant detection and strain selection: samples were quantitatively analyzed by the inhibition effects on formation of lipid peroxides and TBARS to screen the strains able to produce antioxidants. According to the established screening methods, we chose out a strain of actinomycetes, designed as AMBL-029C;(3) antioxidant purification: the fermentation broth was recovered by a series of separation techniques including centrifugation, Amberlite XAD-2 absorption, followed by MeOH elution and a successive TLC purification. The resulting primary purified compound [temperately designed as AMBL-029C-TS] was further analyzed by HPLC to monitor its purity;(4) physical-chemical characteristics: judging from the acid-base fractionation experiments, and the pH and temperature stability tests, the compound was deduced to be a acidic compound with the properties of low polarity and highly pH and temperature stable;(5) mechanism of the antioxidant: in comparison with some other known antioxidants, TS was subjected to investigate its antioxidant mechanism, together with BHT,-tocopherol, as well as two streptomyces metabolites, homogentisic acid and -phenylpyruvic acid, which were previously isolated as the natural antioxidants in our laboratory.

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Firstly the oxidation loss was controlled by the reaction between the coated C/C composites and oxygen. Secondly the oxidation loss was controlled by the producing and vaporing rate of the glass. The oxidation loss was lined with the oxidation time. Thirdly there were cracks in the coating and the deep of the coating was oxidated. The weight loss rate increased linearly and the matrix had been oxidated partly in the end.

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This thesis has chosen the H_2SO_4 anode oxidation. From degreasing, alkaline cleaning, neutralization, the effect of surface before hand treatment on the quality of surface anodizing treatment is discussed. From electrolyte concentration, electrolyte temperature, voltage, timing, additive, the effect of anodizing oxidation on the quality of surface treatment are discussed, From hole sealing liquid composition pH, value, timing, the effect of hole sealing on the quality of surface oxidation treatment are examined.

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aldehyde oxidase：醛氧化酶

脫氫酶(dehydrogenase)促進有機物脫氫,起傳遞氫的作用;葡萄糖氧化酶(glucose oxidase) 氧化葡萄糖為葡萄糖酸;醛氧化酶(aldehyde oxidase) 催化醛氧化為酸;尿酸氧化酶(urafe oxidase) 催化尿酸為尿囊素;聯(lián)苯酚氧化酶(p-diphenol oxidase) 促酚類物質(zhì)氧化生成醌;

anodize：陽極氧化

請教: 關(guān)于各種顏色的陽極氧化(anodize)跟什么有關(guān)?Re: 請教: 關(guān)于各種顏色的陽極氧化(anodize)跟什么有關(guān)?Re: 請教: 關(guān)于各種顏色的陽極氧化(anodize)跟什么有關(guān)?Re: 請教: 關(guān)于各種顏色的陽極氧化(anodize)跟什么有關(guān)?Re: 請教: 關(guān)于各種顏色的陽極氧化(anodize)跟什么有關(guān)?

catechol oxidase：兒茶酚氧化酶

酚氧化酶可分為單元酚氧化酶(monophenol oxidase)如酪氨酸酶(tyrosinase)和多元酚氧化酶(polyphenol oxidase)如兒茶酚氧化酶(catechol oxidase). 酚氧化酶存在于質(zhì)體在线观看成人福利午夜视频在线、微體中,它可催化分子氧對多種酚的氧化,酚氧化后變成醌,并進一步聚合成棕褐色物質(zhì).

glycolate oxidase：乙醇酸氧化酶

研究得比較清楚的,除了線粒體膜上的細(xì)胞色素氧化酶和抗氰氧化酶之外,還有存在于細(xì)胞質(zhì)中的可溶性氧化酶(soluble oxidase),如酚氧化酶(phenol oxidase)、抗壞血酸氧化酶(ascorbate oxidase)和乙醇酸氧化酶(glycolate oxidase)等.

oxidate：氧化 氧化物 氧化物沉積 氧化組沉積

oxidasis 氧化酶氧化作用 | oxidate 氧化 氧化物 氧化物沉積 氧化組沉積 | oxidating 氧化

polyphenol oxidase：多元酚氧化酶

酚氧化酶可分為單元酚氧化酶(monophenol oxidase)如酪氨酸酶(tyrosinase)和多元酚氧化酶(polyphenol oxidase)如兒茶酚氧化酶(catechol oxidase). 酚氧化酶存在于質(zhì)體欧美性猛烈粗大精品、微體中,它可催化分子氧對多種酚的氧化,酚氧化后變成醌,并進一步聚合成棕褐色物質(zhì).

TiO：一氧化鈦

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uranium oxide：二氧化鈾,三氧化鈾,氧化鈾=>酸化

uranium nitride 氮化鈾 | uranium oxide 二氧化鈾,三氧化鈾,氧化鈾=>酸化ウラン | uranium oxychloride 二氯二氧化鈾

oxidizability：氧化能力 氧化性

oxidimetry 氧化測定法 氧化還原滴定法 | oxidizability 氧化能力 氧化性 | oxidizablematerial 易氧化材料

ascorbate oxidase：抗壞血酸氧化酶

研究得比較清楚的,除了線粒體膜上的細(xì)胞色素氧化酶和抗氰氧化酶之外,還有存在于細(xì)胞質(zhì)中的可溶性氧化酶(soluble oxidase),如酚氧化酶(phenol oxidase)、抗壞血酸氧化酶(ascorbate oxidase)和乙醇酸氧化酶(glycolate oxidase)等.