含氮316L不锈钢氮合金化工艺研究

在常压和真空条件下研究了温度与氮分压对316L不锈钢中氮溶解度的影响,钢中氮的溶解度随着温度的降低而升高,随着氮分压的增大而增大.建立了316L不锈钢氮溶解度热力学计算模型,不同吹氮条件下氮溶解度实测值与热力学模型计算值较吻合.在1773～1873K条件下,生产控氮型316L不锈钢,氮分压要控制在6～28kPa以上;生产中氮型316L不锈钢,氮分压要控制在22～101kPa以上.常压下吹氮10min,钢液含氮量即可超过0.10%.     

沙棘叶水溶性多糖SJ21的分离纯化及组成分析

本文的目的是研究沙棘叶中的多糖组分.采用热水提取乙醇沉淀获得沙棘叶水溶性粗多糖的方法,用酸性乙醇和DEAE_SephdexA_25进行分离纯化,红外光谱鉴定多糖,纸层析及气相色谱分析其单糖组成.结果证明:纯度鉴定表明SJ21为纯多糖,分子量约为70KD.SJ21红外光谱中有典型的多糖和β型糖苷键吸收峰.纸层析及气相色谱分析其单糖组成为Xyl、Ara、Man、Glc、Gal,摩尔比为1.0∶2.1∶2.9∶5.3∶3.7.SJ21为首次从沙棘叶中提取获得.     

贵州花江大峡谷黄褐毛忍冬生物学特性初步研究

黄褐毛忍冬 (LonicerafulvotomentosaHsuetS .C .Cheng)系忍冬科忍冬属植物 ,为我国一重要的药物资源及生态治理植物资源。对贵州花江大峡谷喀斯特生态综合治理经济植物黄褐毛忍冬的生物学特性及对其生长环境、根、茎、叶、开花和结实进行了调查和研究。指出 :在典型的喀斯特石山地貌区 ,种植黄褐毛忍冬 ,可有效地进行生态重建 ,且能收到良好的经济效益和社会效益 ,使生态建设可持续发展。     

自由基对水稻叶片衰老的影响

以附体水稻叶片为材料,研究了叶片自然衰老时的生理生化变化,并从自由基诱发剂和清除除剂ＡＣＣ转化为乙烯的影响,探讨了自由基对附体水稻叶片衰老的影响。     

船用智能无线测温系统

为克服船舶复杂电磁环境,实现信息高效传输,该文提出了一种基于TinyOS操作系统的船用智能无线测温系统设计方案,将ATmega128L主控芯片、CC2420射频芯片和DS18B20温度传感器组合设计了无线传感网络节点,实现了温度的精确采集和无线传输,同时通过上位机软件对其进行实时监测、处理、存储和报警.对设计的船用智能无线测温系统进行测试,结果表明该系统能够稳定、准确、快速地获取待测点的温度,而且系统结构简单、节点布置灵活、抗干扰性强,适用于复杂和空间有限的船舶环境.     

Experimental validation of inter-subspecific genetic diversity in rice represented by the differences between the DNA sequences of ‘Nipponbare’ and ‘93-11’

The pedigrees of three sequenced rice cultivars were analyzed to show that a majority of the genetic composition of 'Nipponbare' originates from japonica cultivars while the minority originates from indica cultivars. In contrast, '93-11' is derived mainly from indica cultivars with a smaller contribution from japonica cultivars. All ancestors of 'Guang lu ai 4' appeared to be indica lines. A set of molecular markers (46 InDels and 53 SSRs) polymorphic between 'Nipponbare' and '93-11' were examined in 46 typical indica and 47 typical japonica cultivars selected from 443 accessions according to Cheng's index. All cultivars were divided into indica and japonica groups without overlapping when clustered by Cheng's index, InDels and SSRs. Much higher InDel and SSR diversity between groups than within groups implies that the marker polymorphisms between 'Nipponbare' and '93-11' represent a large proportion of inter-subspecific diversity. About 85% of indica cultivars and more than 90% of japonica cultivars were confirmed to have the same PCR banding patterns as '93-11' and 'Nipponbare', respectively. Some polymorphic loci between 'Nipponbare' and '93-11' cannot be validated in other indica and japonica cultivars, either as subspecies-specific but not predominant alleles, or alleles not specific between the two groups. It was concluded that molecular markers developed from sequence polymorphism between 'Nipponbare' and '93-11' often represent inter-subspecific diversity, although some exceptions were sensitive to either particular marker loci or particular cultivars.     

二阶微分包含的边值问题及其应用

在可分的Banach空间中,讨论了一类二阶微分包含的边值问题和一类反馈控制问题.结合不动点定理,对解的存在性和状态控制对的存在性分别给出了充分性条件.     

淫羊藿属植物研究进展

综合淫羊藿研究的相关文献,对淫羊藿属植物分类和分布、化学成分、药理、生理生态、引种栽培等方面的研究进展进行综述和展望.     

宁夏枸杞叶中总黄酮含量与抗氧化活性关系

为进一步开发宁夏枸杞叶资源,研究宁夏枸杞叶抗氧化活性部位中总黄酮含量与抗氧化活性间关系.以乙醇做提取溶剂,再以不同极性溶剂对醇提液进一步萃取分离;并用DPPH法（DPPH.）测定不同极性萃取部分的抗氧化能力,用分光光度法测定不同极性萃取部分中的总黄酮含量.结果表明,除石油醚萃取部位外,其他各萃取部分在一定质量浓度时,对DPPH自由基（DPPH.）清除率均达到90%,且与总黄酮含量有极显著的相关性（P〈0.01）,其中,正丁醇萃取部分中的总黄酮含量最高,达到77.32mg/g,其清除自由基ρ（SC50）=0.048 3mg/mL,活性与维生素C相当.可为枸杞叶的深度开发提供参考.     

内蒙古野豌豆属一新变种及其花粉形态

记录了豆科野豌豆属一新变种－狭柳叶豌豆Ｖｉｃｉａ ｖｅｎｏｓａ（Ｗｉｌｌｄ．ｅｘ Ｌｉｎｋ）Ｍａｘｉｍ．ｖａｒ．ｉｃｈ－ｈｓｉｎｇａｎｉｃａ Ｓｏｙｏｌｔ ｖａｒ．ｎｏｖ．,并描述了其花粉形态特征。