2012年3月22日星期四

IN SEARCH OF WORKING-CLASS IDEOLOGY: A TEST OF TWO PERSPECTIVES

Pronal-Airix  began as a test of two types of explanation of workers' consciousness. The first focuses on structural factors. The second identifies the variables other than the work that the determinant of workers' consciousness. Based on information collected from workers at two plants in Edmonton, Canada, this research finds that neither perspective emerges as a significant determinant of the ideology of the workers. The second part of the article addresses this issue and proposes an explanation for the failure to account for much of the variation in the ideological thinking of workers. The descriptions were prepared in Pronal-Airix  four games in which dyadic social interactor was expected to have a greater need or tolerance of direct gaze than the other. Subjects listened to one of the descriptions and showed a set of pairs figure mounted on cards in the asymmetric orientation modes. They were asked to identify one of the interactors described to them with one of the figures on the map stimulus. It was expected that if they were asked to identify the high eye contact interactor they would choose the most directly opposite the two figures, but if asked to select the low eye contact interactor they select the least number directly in front. Although the responses were to some extent determined by the characteristics of the characters Pronal-Airix  themselves, provided by the tail orientation asymmetric models also proved to be a powerful determinant of choice, according to the prediction. It is argued that the results provide a basis for interpreting investment figure obtained with the doll placement technique

Synthesis of alkyl-branched fatty acids



A general method forcyclohexylalkanes the hydro-alkyl addition to the non-activated carbon-carbon double bond of alkenes with alkyl chloroformates (primary, secondary), 12, and di-tert-butylpyrocarbonate, 52, was mediated by ethyl aluminum (Et3Al2Cl3) was developed. The reaction of 12 and 52 each are an alkyl cation with Et3Al2Cl3 that is added to the alkene, hydride transfer to the adduct carbenium ion, or possibly, 1,2-H shift by hydride transfer from the newly Et3Al2Cl3 Adduktcarbeniumion followed is the saturated adduct ions. The reaction was applied to 1-alkenes, 2-methyl-1-alkenes, internal double bonds, and three cyclic alkenes. Particularly interested in alkylations of unsaturated fats such as oleic acid (2), the major renewable resources are concentrated. , 2-methyl alkanes 3-methyl alkanes, 2,4-dimethylalkanes, 2,3-dimethylalkanes, 2,2,4-trimethylalkanes, cyclohexylalkanes and carboxylic acids and esters, synthesized wherein the respective branched alkyl chain with good to moderate yields. Mixed anhydrides of N-tert-butoxycarbonyl, N-​​benzyloxycarbonyl-and N-9-fluorenylmethoxycarbonyl amino acids were using isopropyl chloroformate, and by edulcoration. They were more stable than the corresponding anhydrides using ethyl and isobutyl chloroformates. Aminolysis of the anhydrides of an amino acid ester were successful, the amount of the urethane reaction at the carbonate group wherein the same as the other of cyclohexylalkanes the anhydrides is generated. Racemization participate in the coupling of N-benzyloxycarbonylglycylamino acids was by the mixed anhydride method with isopropyl chloroformate a third to a quarter of the observed that for the same couplings with ethyl and isobutyl chloroformate.

2012年3月21日星期三

Synthesis and Structure−Activity Relationships of N-Propyl-N

The specific rates of solvolysis of n-Propyl-chloroformatewere measured inseveral hydroxylic solvents at 25.0 ° C. For methanolysis, the solvents were deuterium isotope effect and activation parameters determined and the activation parameters for solvolysis in ethanol and 80% ethanol so determined. For several of the binary n-Propyl-chloroformate, measurement of the product selectivity ratio allows to determine values​​. Grunwald-Winstein Anextended treatment of the data led to changes in sensitivity to ionizing solventnucleophilicity and power. Comparison with previously determined specific ratesfor solvolysis of chloroformate has is fluorine / chlorine rate of greater than one. Allof the determinations were carried out as part of an addition-elimination (association-dissociation) mechanism, rate-limiting with the addition. Additional specific rates of n-Propyl-chloroformate are determined, to a total of 49 data points, which give simple and extended Grunwald-Winstein treatments areUsed phenyl chloroformate.These values ​​combined with literature values​​.

2012年3月19日星期一

n-butyl thiolochloroformate abstract








  The thermal decomposition of n-butyl thiolochloroformate to 150 ° C follows a pattern similar to that reported previously for n-butyl chloroformate, to give butyl chloride which is substantially revised to s-butyl isomer. An ion pair mechanism, involving 1,2 - and 1,3-hydride shifts, is proposed. The thiono-and dithio-chloroformates less stable decompose to give lower yields of butyl chlorides (mostly without rearrangement) with several other by-products, indicating the operation of a complex combination of reaction pathways. The mass spectra of all three thio compounds exhibit molecular ions, the most important fragment ions in their spectra are the n-butyl cation, and radical cations • • + + COS and CS2. Many chlorine containing ions of low intensity are also observed, and their formation is discussed.



2012年2月7日星期二

Polyacrylamide using the methods and precautions



Polyacrylamide using the methods and precautions 1, a small test to determine the best model, as well as the optimum dosage of the product. 2, preparation of 0.1% (refer to the solid content) concentration in aqueous solution, neutral salt water is appropriate. 3, when dissolved in water, This product is thrown into the mixing water, proper heating (<60 ° C) can accelerate the solution. 4, the solid product packaging, polypropylene woven bag lined with plastic bag 25kg, jelly plastic drum lined with plastic barrel 50kg or 200kg. 5, the hygroscopicity of this product, should be sealed in a cool, dry place, the temperature is lower than 35 . 6, the solid product to avoid Scattered on the ground, to prevent the products to absorb moisture so slippery.
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http://www.chemical-chem.com/Papermaking-chemicals/Polyscrylamide/

2012年2月6日星期一

Overview of Surface Sizing agent



The surface sizing agent  paper or cardboard in the process of a process, usually located in the end of the paper machine drying, the sheet
Not completely dry but has a certain strength to spray a layer of glue layer film formed by the subsequent drying in paper and paperboard surface, so as to achieve the purpose of change of paper or paperboard surface properties. From the development of paper industry, paper surface sizing is one of the essential process of surface sizing agent can be added to improve the performance of the sheet or increase in the surface of paper or paperboard, water resistance additives. Originally, due to the technical level and the limitations of the paper request, surface sizing can only be used on special paper, such as: the banknote paper, bond paper, sea drawings and other. With the technological level of the paper industry, the paper surface sizing agent has become a conventional paper-handling processes, especially in recent years due to printing, photocopying, fax, universal cultural paper, wrapping paper and corrugated surface, strength and The water resistance of a higher demand, the paper industry in the constant quest for new surface sizing  agent techniques.
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http://www.chemical-chem.com/Papermaking-chemicals/Surface-Sizing-Agent/

2012年2月2日星期四

The use of PAM powder (anion)



PAM powder (anion) used in textile, printing and dyeing industry. PAM powder (anion)as a fabric of sizing agents, finishing agents, and can generate supple, wrinkle-free, anti-fungal protection layer. With its strong moisture absorption characteristics, to reduce the off rate in spinning yarn. PAM powder (anion) amide for the treatment agent to prevent static and flame retardant fabrics. PAM powder (anion)is used as auxiliaries, PAM powder (anion)can make the product adhesion, bright and high, but also as the bleaching of non-silicone polymer stabilizers.
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http://www.chemical-chem.com/Papermaking-chemicals/201/