静电纺丝素纳米纤维在修复医学中的应用

静电纺丝是目前制备纳米纤维的一种非常有效的方法之一.由于该技术具有装置简单、价廉、获得的纳米纤维和细胞外基质的结构非常相似,因此,越来越受到研究者的关注.丝素蛋白是一种天然的、可降解、低免疫原性的结构蛋白,在生物材料中具有广泛的应用前景.本文综述了静电纺纳米丝素在修复医学中的研究进展,并对以后的发展趋势提出了想法.     

我国桑蚕茧加工设备的发展历程

本文主要介绍了我国桑蚕茧加工设备的发展历程,简述了蚕茧加工的发展趋势。     

Reliability of Chlorophyll Meter Measurements Prior to Corn Silking as Affected by the Leaf Change Problem

The normal practice of using chlorophyll meters involves measuring the youngest fully developed leaf of a corn plant (Zea mays L.) before silk emergence and then switching to the ear leaf. A discontinuity exists of chlorophyll meter measurements associated with leaf change prior to the silking stage. The lag of silk emergence within a cornfield prior to silk emergence makes it practically impossible to take chlorophyll measurements on leaves at the same growth stage. Therefore, the change in leaves being measured introduces errors when chlorophyll meters are used prior to silk emergence to diagnose nitrogen (N) deficiencies. We report results from three field studies to assess the difference in chlorophyll measurements between the uppermost fully developed leaf and the ear leaf near the time of silk emergence and identify possible problems associated with the difference when chlorophyll meters are used to estimate the need for in‐season fertilization in cornfields.     

公共选修课《丝绸学》教学实践与探索

介绍了在农业大学设置丝绸学选修课的背景及课程定位,着重阐述了课堂上如何以丝绸为载体弘扬中华传统文化,营造积极向上氛围,不失时机地对学生进行创新意识、人生价值观的正确引导、寓育于教之中的实践与探索。     

蚕丝蛋白在非绢丝领域的研究进展

介绍了蚕丝蛋白的组成,概述了蚕丝蛋白在食品、医药医疗、化妆护肤品、生物工程、环保、轻工业领域的研究进展。     

Nutrient concentration of corn as effected by poultry manure

Abstract

The elemental composition of corn was evaluated during the 1973 growing season in an experiment with various rates of poultry manure. In general, the nutrient concentration of plant tissue reflected poultry manure applications with the exception of Mg which declined and Ca, Fe and Na which appeared to be largely unaffected. The elemental concentrations in the corn tissue were not in a toxic range however, the nutrient balance was changed by poultry manure application. Sampling of corn early in the growing season can be quite valuable with respect to predicting nutrient concentration of more mature corn for Mg, Mn, B and Zn, but it leaves much to be desired for the other elements tested.     

用气相色谱—质谱法分析玉米须中化学成分的研究

用水蒸气蒸馏法提取玉米须中的挥发油,采用气相色谱—质谱(GC-MS)联用技术,鉴定出59种化合物,其中主要的化学成分有棕榈酸(17.45%)、乙酸乙酯(7.56%)、2-甲氧基-4-乙烯基苯酚(5.62%)、糠醛(4.91%)、亚油酸乙酯(3.79%)、5-甲基糠醛(2.75%)、正壬酸(2.62%)、糠醇(2.12%)、香草醛(2.01%)、苯乙醇(1.65%)、苯乙醛(1.54%)、正庚酸(1.48%)、正己酸(1.42%)、六氢金合欢基丙酮(1.32%)、正十五酸(1.29%)和月桂酸(1.02%)。     

柞蚕多丝量品种宛黄一号、宛黄二号的选育

通过多年系统选育的方法,对柞蚕遗传性较强的茧层率性状进行连续有目的地认真选择,培育出柞蚕多丝量品种宛黄一号、宛黄二号。这2个品种健康好养,抗病性、抗逆性好,千克卵收茧量平均达380 kg以上,千粒质量10 kg以上,茧层率连年达16%以上,分别比河南省柞蚕现行品种三三高出9.5%,18%,46%,目前在生产上发挥着巨大作用。     

丝素蛋白缓释微球的研究进展

微球是以高分子材料为载体包裹或吸附药物而制成的微小球状实体,粒径范围一般为1～500μm。丝素蛋白是从蚕丝中提取的天然蛋白质,具有良好的生物相容性、可降解性和理化性能,被广泛应用于手术缝合线、人工皮肤、组织工程材料、细胞培养基、药物缓释载体等。以丝素蛋白为原料制备的丝素微球,具有比表面积大、可生物降解、生物相容性好等优点,因此被广泛地研究。本文介绍了丝素蛋白缓释微球的研究现状,并对丝素微球的发展前景做出了展望。     

蚕丝的综合利用概述

简述了蚕丝在食品、生物材料、化妆品、和吸水材料方面的应用,介绍了蚕丝作为生物材料方面的研究进展。