Analyses of pecan,peanut, and other oils by gas-liquid chromatography and ultra-violet spectrophotometry

Comparative analyses of oils obtained from 12 varieties of pecans, 11 of peanuts, two of avocados and one each of citrus seed, Wesson oil, corn, and of lard by GLC and UV procedures showed good agreement except for Wesson oil, corn oil, and lard. Iodine values computed from GLC results checked Wijs values closely. Oleic acid ranged from 51 to 77% in pecans and from 43 to 64% in the peanut with linoleic acid in complementary percentages. Level of palmitic acid in the peanut varied directly with level of linoleic acid, in the avocado it apparently varied directly with level of hexadecenoic acid while in the pecan the level of palmitic remained constant even though the level of unsaturated acids varied widely. Both peanuts and pecans were locally grown under similar environmental conditions. Journal Series No. 1079 of the Florida Agricultural Experiment Station.     

Characteristics of school psychology program directors and program production.

Conducted a survey to determine how directors of school psychology programs receive their preparation and what kinds of programs they direct. 157 returned questionnaires revealed that directors came from a wide variety of preparatory departments; were predominantly men; were mostly in departments of education, where they prepared specialists for the schools; and had served as director for less than 4 yrs. A majority had had field practice. Their duties were comparable to those of directors of clinical programs. School psychologist programs currently produce nearly 10 times as many subdoctoral as doctoral graduates. (8 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Using social indicators to predict addiction

Because of cost and other constraints, states often find it difficult to estimate need for treatment of alcohol-related problems from routine surveys. The social undesirability of illegal drug use makes the assessment of need for treatment of their use even more difficult. This paper uses independently obtained treatment need estimates to provide parameters for short-term prediction. We obtained the parameters by regressing the proportions of people addicted to alcohol (or drugs) in counties on social-indicator-based relative treatment need estimates for alcohol (or drugs). In addition to integrating estimates coming from independent sources, our approach presents an important tool for planning and resource allocation.     

Thymidine kinase mutants obtained by random sequence selection

Knowledge of the catalytic properties and structural information regarding the amino acid residues that comprise the active site of an enzyme allows one, in principle, to use site-specific mutagenesis to construct genes that encode enzymes with altered functions. However, such information about most enzymes is not known and the effects of specific amino acid substitutions are not generally predictable. An alternative approach is to substitute random nucleotides for key codons in a gene and to use genetic selection to identify new and interesting enzyme variants. We describe here the construction, selection, and characterization of herpes simplex virus type 1 thymidine kinase mutants either with different catalytic properties or with enhanced thermostability. From a library containing 2 x 10(6) plasmid-encoded herpes thymidine kinase genes, each with a different nucleotide sequence at the putative nucleoside binding site, we obtained 1540 active mutants. Using this library and one previously constructed, we identified by secondary selection Escherichia coli harboring thymidine kinase mutant clones that were unable to grow in the presence of concentrations of 3'-azido-3'-deoxythymidine (AZT) that permits colony formation by E. coli harboring the wild-type plasmid. Two of the mutant enzymes exhibited a reduced Km for AZT, one of which displayed a higher catalytic efficiency for AZT over thymidine relative to that of the wild type. We also identified one mutant with enhanced thermostability. These mutants may have clinical potential as the promise of gene therapy is increasingly becoming a reality.     

Effect of prepartum anionic supplementation on periparturient feed intake, health, and milk production

Our objectives were to determine if dietary cation-anion difference (DCAD) and source of anions influence periparturient feed intake and milk production of dairy cattle during the transition period. Diets differed in DCAD (cationic or anionic) and anionic supplement. The 4 diets used prepartum were (1) control [DCAD +20 mEq/100 g of dry matter (DM)], (2) Bio-Chlor (DCAD −12 mEq/100 g of DM; Church & Dwight Co. Inc., Princeton, NJ), (3) Fermenten (DCAD −10 mEq/100 g of DM; Church & Dwight Co. Inc.), and (4) salts (DCAD −10 mEq/100 g of DM). Urine pH was lower for cows that consumed an anionic diet prepartum compared with control. Prepartum diet had no effect on prepartum dry matter intake (DMI) of multiparous or primiparous cows. Postpartum DMI and milk yield for multiparous cows fed anionic diets prepartum were greater compared with those fed the control diet. Postpartum DMI and milk yield of primiparous cows were similar for prepartum diets. Feeding prepartum anionic diets did not affect plasma Ca at or near calving. However, cows fed anionic diets began their decline in plasma Ca later than control cows. Postpartum β-hydroxybutyrate and nonesterified fatty acids were lower for primiparous cows fed prepartum anionic diets compared with those fed the control diet. Prepartum and postpartum plasma glucose concentrations were not affected by prepartum diet for all cows. Liver triglyceride differed for parity by day. Parities were similar at 21 d prepartum, but at 0 d and 21 d postpartum, levels were greater for multiparous cows. Results indicate that decreasing the DCAD of the diet during the prepartum period can increase postpartum DMI and milk production of multiparous cows without negatively affecting performance of primiparous cows.     

我国钾盐产业及市场需求运行情况

从我国的钾盐产业政策,钾资源,钾盐的科研、生产,近年的钾盐产量、消耗量与剩余结转库存量,总结我国钾盐产业运行情况。指出我国正合理引导开发利用钾盐资源;2009年不用进口钾盐即可满足国内需求;中远期我国钾盐对外依存度应降到30％;构建我国钾肥的稳定供应体系,打破垄断格局。     

Effects of microwave radiation on electrodeposition processes at tin-doped indium oxide (ITO) electrodes

In situ microwave activation is investigated for the electrodeposition of a metal (gold) and for a metal oxide (hydrous Ti(IV) oxide) onto tin-doped indium oxide (ITO) film electrodes. It is demonstrated that localized microwave heating of the ITO film can be exploited to affect electrodeposition processes.The electrochemically reversible and temperature sensitive one-electron redox system Fe(CN)₆^3−/4− was employed in aqueous solution in order to calibrate the average surface temperature at the ITO film electrode. In the presence of microwave radiation the average electrode surface temperature reached ca. 363 K whereas under the same conditions the bulk solution temperature reached ca. 313 K. Therefore localized heating of the ITO film appears to be important.The rate of electrodeposition of gold from an aqueous 1 mM tetrachloroaurate(III) solution in 0.1 M KCl (adjusted to pH 2) is enhanced by microwave activation. However, the morphology of deposits remains un-effected. Hydrous titanium (IV) oxide films were electrodeposited from an aqueous solution of 1 mM TiCl₃ in 0.1 M acetate buffer pH 4.7. Dense films with blocking character were obtained with conventional heating but a fibrous more open deposit forms in the presence of microwaves.     

压力容器制造设计许可评审中企业普遍存在问题的综述

1压力容器设计许可评审中企业存在的共性问题1.1设计条件方面1.1.1绝大多数200人左右的具有压力容器设计许可证的制造企业,其技术人员总数不多,凑数现象普遍,有的将各级领导岗位具有工程技术职称的都任命为设计、校核人员,这样的企业许     

Thirty Years' Reform and Development in China's Refractories Industry

1 Development of Refractories Industry Since the People's Republic of China FoundedRefractories is mainly used in high temperature industries,such as metallurgy,building materials,nonferrous,chemical,mechanical,electric power industries,which is the important fundamental material for high temperature industries.China began to manufacture refractories and had it firstly applied in ceramics industry in Shang Dynasty lasting more than 3 000 years. However,China's refractories industry was in a backward stat...