家蚕丝素凝胶固定化细胞生产L-天门冬氨酸的研究

作者用家蚕丝素制成丝素溶液,加人大肠杆菌细胞混匀凝固后,再用戊二醛固定和交联,制成固定化细胞丝素凝胶,用于转化延胡索酸为L-天门冬氨酸。测定了固定化细胞转化率和转化效率。实验结果表明,通过控制底物的流速,可使转化率达到95％以上。在转化率为95％时,达到最大转化效率,产率为6．31g/h。连续使用一个月转化原活力仍保持在92％以上。     

藏药天门冬膏质量标准的研究

目的建立藏药天门冬膏的薄层鉴别方法并探索天门冬膏所含的水分及微生物的限量。方法经比较选用两种展开剂进行薄层色谱鉴别研究,发现以三氯甲烷-甲醇-水(14∶6∶2)10℃以下放置的下层溶液为展开剂的鉴别方法最佳;膏所含的水分不超过50%;微生物的限量符合要求。结论试验表明以三氯甲烷-甲醇-水(14∶6∶2)10℃以下放置的下层溶液为展开剂的鉴别方法专属性强,重现性好,准确、可行,为藏药天门冬膏质量标准的建立及生产过程的质量控制提供了依据。     

含苞待放的本土奇葩——记陈光宇博士和中国芦笋产业30年

芦笋,又名石刁柏,学名(Asparagusofficinalis.L),百合科天门冬属,雌雄异株的多年生宿根性植物。可食用部分形似芦苇茎和竹笋,故俗称芦笋。芦笋不仅味道鲜美,且营养成分丰富而均衡,蛋白质、多种维生素和碳水化合物的含量均显著高于普通蔬菜。特别是芦笋中含有的天门冬酰胺、抗坏血酸、胆碱、精氨酸、拓扑异构酶和硒元素,令其具有防癌抗癌、降低血脂、清肺保肝、增强免疫力等多种人体保健功能。故而芦笋素有"蔬菜之王"的美誉。     

天门地区当代婚俗中的泛民俗现象及其思考

本文主要通过比较天门地区传统婚俗与现代婚俗的不同,揭示天门地区当代婚俗中的诸多泛民俗现象,并由此引发笔者的诸多思考。     

异硫氰酸苯柱前衍生法测定天冬中天冬素含量

目前中药材的质量优劣正从过去的经验判断趋向于从有效成分含量来评定。天冬素是天冬中具有代表性的有效成分,作者用水煎醇沉法提取天冬素,而后以异硫氰酸苯(PITC)为衍生剂,进行柱前衍生,在Pico-Tag~(TM) HPLC系统上进行含量测定。本实验为天冬的真伪鉴别及质量优劣评定提供了一种方法和依据。     

钢结构工程冬期施工技术与管理

本文从工程施工的实际出发,重点讨论了钢结构冬期施工中应注意的问题,为供类似工程施工参考。     

浅谈冬季施工及注意事项

冬季施工难度大,容易出现质量事故。因此,冬季施工的技术要求相对严格。根据冬季施工的问题和隐患,必须提前采取必要的准各措施。     

浅论冬期混凝土施工的质量保障

《建筑工程冬期施工规程》（JGJl04—97）规定,当室外日平均气温连续5天稳定低于＋50c即进入冬期施工．在工程建设施工过程中．受自然气候的影响．加之工程建设的进度需要．有时不可避免地要进行冬班施工．但若采取的措施不当．会给施工的工程带来不利的影响．极易给工程质量造成隐患或出现质量事故．本文就如何做好冬期施工进行探讨．     

预制梁冬期施工的质量控制

简述冬期施工的必要性和经济意义,以预制梁为例分析冬期施工中出现的主要问题,通过热工计算,解决如何进行冬期施工的养护问题.     

云南鳞毛蕨属植物分类概要

本文研究云南产鳞毛蕨属植物的属下分类并列出所有的种类。该属植物在云南现知至少有88种，属下可划分为3个亚属和12个组。为了使这些类群之间的特征轮廓清晰，本文提供了分亚属及分组的检索表。     

小麦属的分类

 In the present paper, an brief historical account and the comments on the modern taxonomic systems of the genus Triticum L. are made. The author suggests that principles to determine a species be (1) a special type of genome, and (2) reproductive isolation. The principles to determine a subspecies are the special co-type of genome and incomplete reproductive isolation. There are no differences on the level of genome constitution and no reproductive isolation between the varieties or concultivars. According to these principles, the author schemes a taxonomic system of the genus Triticum L. based on biosystematics as follows:      Triticum monococcum L. sensu lat.        subsp. boeoticum (Boiss.) Yen, st. nov.           var. thaoudar (Reut ) Flaksb.           concv. Einkhorn        subsp. urartu (Tum.)Vap.      T. timopheevi Zhuk. sensu lat.           var. araraticum (Jakubz.) Yen, st. nov.      T. zhukovskyi Men. et Er.      T. turgidum L. sensu lat.           var. dicoccoides (Körn. in litt. in Schweinf.) Bowden           concv. (1) Emmer, (2) Durum wheat, (3) Rivet wheat, (4) Polish wheat, (5) Persian wheat.      T. aestivum L. sensu lat.           concv. (1) Tibetian weed wheat, (2) Spelt, (3) Vavilov wheat, (4)  Macha wheat, (5) Yunnan hulled wheat, (6) Winter common wheat, (7) Spring common wheat, (8) Branch-eared wheat, (9) Club wheat, (I0) Indian dwarf wheat, (11) Xinjiang ricewheat.     

Probability Disassembled

While there is no universal logic of induction, the probabilitycalculus succeeds as a logic of induction in many contexts throughits use of several notions concerning inductive inference. Theyinclude Addition, through which low probabilities representdisbelief as opposed to ignorance; and Bayes property, whichcommits the calculus to a ‘refute and rescale’ dynamicsfor incorporating new evidence. These notions are independentand it is urged that they be employed selectively accordingto needs of the problem at hand. It is shown that neither isadapted to inductive inference concerning some indeterministicsystems.

1 Introduction

2 Failure of demonstrations of universality

2.1 Working backwards

2.2 The surface logic

3 Framework

3.1 The properties

3.2 Boundaries

3.2.1 Universalcomparability

3.2.2 Transitivity

3.2.3 Monotonicity

4 Addition

4.1 The property: disbelief versus ignorance

4.2Boundaries

5 Bayes property

5.1 The property

5.2 Bayes' theorem

5.3Boundaries

5.3.1 Dogmatism of the priors

5.3.2 Impossibilityof prior ignorance

5.3.3 Accommodation of virtues

6Real values

7 Sufficiency and independence

8 Illustrations

8.1 All properties retained

8.2 Bayes propertyonly retained

8.3 Induction without additivity and Bayes property

9Conclusion