芳香油与油脂植物资源教学实践

精油与油脂分别是芳香油植物和油脂植物提取的天然产品.通过芳香油与油脂植物资源教学实践,探求植物资源学课程适宜的教学内容与方法.从专业特色角度出发,除了讲授常规植物资源总论和植物资源各论,增加了森林植物资源学和植物资源学课内实践（实验）等相关内容,加强学生实践技能培养,提升本科生综合素质.     

The history of broad and general education in scientific psychology: The foundation for professional psychology education and training.

The article provides the historical roots and rationale for providing professional psychologists with knowledge of the underpinnings in core scientific areas of psychology with two goals–knowledge of those scientific areas themselves and as the basis for further understanding the integration of science and practice to improve professional service delivery. This article discusses the early roots of the applied areas within psychology and the changes in curricular expectations in accreditation to the current provisions for the accreditation of doctoral programs in professional psychology. After the historical introduction, the article discusses the current use of the concept of broad and general training as the basis for current practice in accreditation of programs in professional psychology and for the practice as a licensed psychologist. Finally, the article provides some initial discussion of the different perspectives in the rest of the section regarding how best to provide students with appropriate knowledge for competence in scientific underpinnings of professional psychology. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Modification of PROMETHEUS Reactor as a Fusion Breeder and Fission Product Transmuter

This study presents the analyses of the fissile breeding and long-lived fission product (LLFP) transmutation potentials of PROMETHEUS reactor. For this purpose, a fissile breeding zone (FBZ) fueled with the ceramic uranium mono-carbide (UC) and a LLFP transmutation zone (TZ) containing the ⁹⁹TC and ¹²⁹I and ¹³⁵Cs isotopes are separately placed into the breeder zone of PROMETHEUS-H design. The neutronic calculations are performed by using two different computer codes, the XSDRNPM/SCALE4.4a neutron transport code and the MCNP4B Monte Carlo code. A range of analyses are examined to determine the effects of the FF, the fraction of ⁶Li in lithium (Li) and the theoretical density (TD) of Li₂O in the tritium breeder zone (TBZ) on the neutronic parameters. It is observed that the numerical results obtained from both codes are consistent with each other. It is carried out that the profiles of fission power density (FPD) are flattened individually for each FF (from 3 to 10%). Only, in the cases of FF ≥ 8%, the system is self sufficient from the point of view of tritium generation. The results bring out that the modified PROMETHEUS fusion reactor has capabilities of effective fissile breeding and LLFP transmutation, as well as the energy generation.     

Canola Quality Indian Mustard Oil (<Emphasis Type="Italic">Brassica juncea</Emphasis>) is More Stable to Oxidation than Conventional Canola Oil (<Emphasis Type="Italic">Brassica napus</Emphasis>)

Canola-quality Indian mustard (Brassica juncea) is being developed as a complimentary oilseed crop to canola (Brassica napus) for cultivation in hot and low-rainfall areas, where canola does not perform well. In Australia, several B. juncea breeding lines have been developed for commercial cultivation and for eventual processing as canola oil. However, there still are significant species-based differences in the fatty acid composition with B. juncea containing lower levels of linoleic acid and higher levels of oleic and linolenic acids compared with B. napus. This has raised concern about possible oxidative stability differences between the oils. Oils (unrefined) extracted from different breeding lines of each species were subjected to accelerated autoxidation, and development of oxidative rancidity was assessed by four separate techniques: depletion of polyunsaturated fatty acids, depletion of tocopherol, development of primary oxidation products, and development of secondary oxidation products (propanal and hexanal). All the tests showed that the newly developed B. juncea oils are more stable to autoxidation than conventional canola (B. napus) oil, despite containing marginally higher linolenic levels. Oxidative stability does not appear to be a barrier to using oils from these emerging lines of B. juncea for partial or full replacement of conventional canola oil.     

天然防腐剂——那他霉素

The article mainly introduced the character of antimicrobial Natamycin, the preservative mechanism, the application in meat products was reviewed and the development of Natamycin was proposed.     

Contributions of NIST/NBS Researchers to the Crystallography of Construction Materials

For more than 100 years, the primary theme underlying the NBS/NIST staff contribution to the crystallography of building materials has been the development of an improved understanding of concrete materials performance. Over that time period, portland cement concrete has become one of the most important of our construction materials for roads, buildings, and other large municipal structures. At the beginning of the 20th century our understanding of portland cement composition, performance, use in concrete, and how the concrete performs in harsh environments was lacking. The efforts of NIST have served to advance construction materials science and technology through the combined efforts of experimental, field study, and theoretical computational materials science. One major achievement in the late 1920s, derived from studies on phase equilibria in cement clinker, allows calculation of potential cement clinker composition. Known as the Bogue calculation, this continues to be an essential tool in cement plant process control to this day. Additionally, contributions of NIST scientists to our knowledge of the chemistry and nature of cement hydration products have been crucial in our understanding of cement hydration and concrete durability. Today, computational materials science is a rapidly developing discipline, and NIST is developing tools incorporating predictive models aided by empirical studies. Examples include a computer-integrated knowledge system for prediction and optimization of performance and life-cycle cost of high performance concrete and the Virtual Cement and Concrete Testing Laboratory. Understanding the relationships between material and performance properties has not been confined only to portland cements. One of the longest running experiments at NIST, the stone test wall, has stood for over 50 years as one of the world’s largest single collections of building stone, and is invaluable for studying weathering effects associated with stone mineralogy and texture. Standards development has also been promoted through participation on ASTM subcommittees on stone, cement, and concrete. The Cement and Concrete Reference Laboratory, established in 1929, continues to provide testing and training for outside laboratories and maintains a historical record of test data on construction materials.     

导电胶的研究新进展

介绍了近年来发展迅速的几种典型的导电胶(如纳米导电胶、复合导电胶、紫外光固化导电胶和无导电粒子导电胶等),阐述了导电胶可靠性研究中环境影响试验的研究现状,展望了今后导电胶的应用前景和发展方向。     

积极应对竹胶合板企业高成本时代提前到来

面对竹胶合板企业高成本时代的来临,指出了应该走以加强科技创新,以高科技进步为先导的发展道路,企业才能不断发展壮大,并就此提出了一些具体的措施,并进行了分析。     

Study on the effect of grain storage and processing on deltamethrin residues in post-harvest treated wheat with regard to baby-food safety requirements

The effects of storage intervals and of milling procedures on dissipation of deltamethrin residues in post-harvest treated wheat grain were studied with the aim to obtain scientific data on compliance of the processed products with the safety requirements concerning baby foods. The insecticide formulation was applied on stored wheat at a recommended rate of active ingredient of 0.5 mg kg^-1 and at a higher rate of 4 mg kg^-1, performing the highest protective effect. The dissipation of residues and their distribution in different fractions of the milled grain were studied after various storage intervals, from 7 to 270 days after treatment. Eight fractions—bran, semolina, three types of groats, and three types of flour—were collected after milling of grain and analysed for determination of pesticide residues. The residues were determined by gas chromatography characterized by the limit of determination of 0.005 mg kg^-1, low enough for enforcement of the maximum residue level of 0.01 mg kg^-1 established by the European Commission Directive for any pesticide in cereal-based foods. Deltamethrin applied post-harvest on wheat as grain protectant was distinguished by low rate of degradation on the grain under practical storage conditions. One hundred and eighty days after treatment at an application rate of 0.5 mg kg^-1, the residues were between 0.03 and 0.2 mg kg^-1 in the various types of flour. Two hundred and seventy days after treatment at a rate of 4 mg kg^-1, the residues in the flour were in the range of 0.4-1.5 mg kg^-1.