Aiming at precision measurement of cylindricity,this paper puts forward a kind of method which can sep- arate the cross- section roundness error,the radius error of different cross sections,the initial coordinates of least square centers of measured cross sections and can reconstruct the pattern of the measured cylinder,i.

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Influencing factors of dissociative cross section, change of cross section with electron energy as well as the dependence of the cross section by vibrational level of ground state are presented in the paper.

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For the reaction between divinyl sulfone and N-ethylethylene-diamine or N-methylpropane-1, 3-diamine , no cross-linking occurred when the feed ratio of A〓 to BB'〓 was 1/1. When the feed ratio of DV to NDA or NPA is 3/2, no cross-linking occurred too in organic solvents such as DMSO, DMF and NMP, while cross-linking does occur in water.

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The gelable fiber is cross-linked by a bivalent or multivalent basic cross-linking agent, thereby cross-linking the composite fiber.

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Due to great amount of double bond on rubber chain,a lot of intramolecular reaction occurred in the system,which made the uncontrolled cross-linked system into a controlled cross-linked copolymerization,resulting in chain growth can't go illimitably in cross-linking process.

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Up to date, QTL analysis of adult-plant resistance against powdery mildew has not been reported in China. In the present study, QTL mapping of APR was conducted using a doubled-haploid population derived from the cross (Fukuho-komugi × Oligoculm) and a F_(2:3) population from the cross (Bainong64 × Jingshuang16). The methods and main results are described as follows:1. A doubled-haploid population from an intervarietal cross between the Japannese cultivar Fukuho-kumugi and the Israeli wheat line Oligoculm was prouduced by means of wheat × maize crosses.

國內(nèi)關(guān)于白粉病成株抗性的QTL分析尚未見報道，本研究開展了小麥白粉病成株抗性鑒定色哟哟操爆、遺傳連鎖圖構(gòu)建按摩一级毛片真人、白粉病成株抗性QTL分析，得到以下研究結(jié)果：(1)以抗白粉病的日本小麥品種Fukuho-komugi和以色列小麥Oligoculm雜交產(chǎn)生的DH群體為材料无码视频天天做夜夜夜做，利用313個SSR標(biāo)記和37個RFLP標(biāo)記av无码aV天天aV天天爽，對Fukuho-komugi和Oligoculm的白粉病成株抗性進(jìn)行QTL分析久久95国产热情精品国产。

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The decisive influencing factor of viscosity in carboxyl-methylation was cross-linking reaction. Carboxyl-methylation was the main influencing factor of solubility and swelling capacity in modification of high content amylose starch. The structure and gelatinization property of different amylose content were analyzed with an Olympus Vanox BHS-2 multi-function optic microscope, and the results were as follows. The structure of ordinary cornstarch was different from the high amylose; gelatinization temperature and pH value of starch were affected deeply by amylose content, but had little difference between the gelatinization of high content amylose starch contained 50% and 70% amylose; pH value had much more effect than temperature on the gelatinization of high content amylose cross-linked starch. Monochloroacetic acid consumption, alcohol concentration and pH value influenced the starch carboxyl-methylation. When alcohol concentration was 60%, pH value 10, monochloroacetic acid/starch mass ratio 55%, the carboxyl-methylation of high amylose cross-linked cornstarch had the best result. With the In-Vitro digestibility model and biodegradation experiment, the digestibility and biodegradability of high amylose cornstarch and its modified starch were detected.

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The results show that the radiative properties of randomly distributed soot aggregates for a given fractal dimension are complex functions of the monomer diameters, the number of monomers in the aggregates,and the refractive index; For a small value of the monomer diameters, the absorption cross section of soot aggregates tends to be relatively constant when the fractal dimension is small but increases rapidly when the fractal dimension exceeds two. However, a monotonical reduction in light absorption with the increase of the fractal dimension is observed for soot aggregates with sufficiently large monomer diameters, number of monomers,and refractive index. The scattering cross section , extinction cross section and single-scattering albedo increase monotonically with the increase of the fractal dimension. Overall, the results for soot aggregates differ profoundly from those calculated for the equivalent spherical particles, and the discrepancies between them will change small with the increase of the fractal dimension.

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