热处理对铁基非晶合金磁后效的影响

测量了制备态和热处理状态的Ｆｅ基非晶合金的磁后效。发现在１５０℃时效对非晶材料的稳定性是不利的，然而在居里温度以上退火却显著地抑制了磁后效。用非晶磁后效理论对热处理效应的机制进行了探讨。     

Sequencing of Aspergillus nidulans and comparative analysis with A. fumigatus and A. oryzae

The aspergilli comprise a diverse group of filamentous fungi spanning over 200 million years of evolution. Here we report the genome sequence of the model organism Aspergillus nidulans, and a comparative study with Aspergillus fumigatus, a serious human pathogen, and Aspergillus oryzae, used in the production of sake, miso and soy sauce. Our analysis of genome structure provided a quantitative evaluation of forces driving long-term eukaryotic genome evolution. It also led to an experimentally validated model of mating-type locus evolution, suggesting the potential for sexual reproduction in A. fumigatus and A. oryzae. Our analysis of sequence conservation revealed over 5,000 non-coding regions actively conserved across all three species. Within these regions, we identified potential functional elements including a previously uncharacterized TPP riboswitch and motifs suggesting regulation in filamentous fungi by Puf family genes. We further obtained comparative and experimental evidence indicating widespread translational regulation by upstream open reading frames. These results enhance our understanding of these widely studied fungi as well as provide new insight into eukaryotic genome evolution and gene regulation.     

The human chorionic gonadotrophin bio-assay by seminal vesicles in mice

Zusammenfassung Biologische Methode zur Bestimmung von Choriogonadotrophin (HCG) im Harn, welche auf Gewichtszunahme von Samenblasen juveniler Mäuse basiert.     

秦皇岛海水浴场海滩小型底栖动物丰度的研究

2013年5月、9月和10月,在秦皇岛东山浴场海滩对小型底栖动物进行采样,对其平均丰度、各潮带水平分布、垂直分布和优势类群进行了研究。结果显示:小型底栖动物的平均丰度为695.26 ind/10 cm~2,5月份最低为428.58 ind/10 cm~2,9月份为504.99 ind/10 cm~2,10月份最高达到1 152.20 ind/10 cm~2;低潮带平均丰度为261.68 ind/10 cm~2,中潮带为318.54 ind/10 cm~2,高潮带为115.04 ind/10 cm~2;主要小型底栖动物类群为自由生活的海洋线虫、桡足类、多毛类、枝角类、涡虫类和端足类等,其中,海洋线虫为第一绝对优势类群,平均占93.01%,多毛类和涡虫类分别为第二、三优势类群,平均分别占3.28%和2.81%;小型底栖动物垂直分布由表层向底层呈减少的趋势。此外,海洋线虫与桡足类的丰度比为695.69,大于100,初步判断为有污染。     

基于结构动力学的框架结构的加固方法

分析动荷载作用下框架结构产生较大振动的成因;通过实际工程的结构动力学模拟分析,说明合理的结构设计及消除共振等有关振动的结构因素,可以达到减振的目的;提出工程加固施工注意事项,以及方便、安全与经济的加固方法;通过工程实际运营,证明该方法效果良好.     

藏雪鸡（Tetraogallus tibetanus）冬季活动规律及觅食地的选择

2009年12月～2010年3月间在西藏日喀则南木林县南木林镇岗噶村周围对藏雪鸡的冬季活动规律与觅食地选择进行了初步研究。结果显示,藏雪鸡在该地区冬季主要活动在平均海拔4484.16±242.99m（n=73）,上线海拔达到5233m,下线海拔4213m。日活动强度显示有3个峰点,分别是9：00、12：00、19：00。主要以6～10只为集群的形式觅食。通过对73个样方14个参数进行主成分分析后发现,海拔高度是冬季藏雪鸡活动规律及觅食地选择的最主要因子,植被是次主要因子,坡向是次要因子。     

Low-cost solid FeS lubricant as a possible alternative to MoS2 for producing Fe-based friction materials

Three reaction systems of MoS2–Fe, FeS–Fe, and FeS–Fe–Mo were designed to investigate the use of FeS as an alternative to MoS2 for producing Fe-based friction materials. Samples were prepared by powder metallurgy, and their phase compositions, micro-structures, mechanical properties, and friction performance were characterized. The results showed that MoS2 reacts with the matrix to produce iron-sulfides and Mo when sintered at 1050°C. Iron-sulfides produced in the MoS2–Fe system were distributed uniformly and continuously in the matrix, leading to optimal mechanical properties and the lowest coefficient of friction among the systems studied. The lubricity observed was hypothesized to originate from the iron-sulfides produced. The FeS–Fe–Mo system showed a phase composition, porosity, and density similar to those of the MoS2–Fe system, but an uneven distribution of iron-sulfides and Mo in this system resulted in less-optimal mechanical properties. Finally, the FeS–Fe system showed the poorest mechanical properties among the systems studied because of the lack of Mo reinforcement. In friction tests, the formation of a sulfide layer contributed to a decrease in coefficient of fric-tion (COF) in all of the samples.