超滤膜分离对绿茶茶水处理效果的影响

研究了超滤膜对绿茶茶水的分离效果 ,为超滤分离技术应用于绿茶饮料和茶多酚的工业生产提供了有关依据。研究结果表明 ,截留分子量小于 2 0 0 0 0的超滤膜 ,对茶水中的固形物、茶多酚的截留率分别高达 89%、 87% ;截留分子量高于 10 0 0 0 0的超滤膜可有效截留茶水中的大分子蛋白质和果胶类物质 ,改善了茶水的溶液特性 ,有利于茶多酚的工业生产 ;操作温度对茶水的超滤效果有显著影响。     

茶饮料保香及增香途径的探讨

介绍了茶叶原料的选择、焙火处理、杀菌技术、添加果胶酶处理、添加天然胡萝卜素和外源酶、香气回收技术等在茶饮料保香、增香上的应用,展望了其应用前景     

β-Carotene and Ascorbic Acid Retention in Fresh and Processed Vegetables

Broccoli, carrots, and green beans (grown in 2 consecutive years) were randomly divided into 3 treatments: fresh-refrigerated (F-R), frozen (FZ) or canned (C) (carrots only). FZ or C vegetables were processed within 24 h and stored for up to 1 yr. F-R vegetables were held at 4 °C for 3 wk (broccoli and green beans) or 6 mo (carrots). Trans b-carotene (Tb-C) and total ascorbic acid (AA) were determined at specified times, before and after microwave cooking. Vitamin content differed between years due to environmental conditions. Blanching resulted in AA loss, but retention remained stable after freezing broccoli and green beans. F-R green beans lost >90% AA after 16 d storage. Linear decreases in AAwere found in most F-R or FZ vegetables. Tb-C decreased slightly during freezer storage. Reductions in Tb-C occurred in canned carrots. Microwave cooking had minimal effects on AA or Tb-C.     

一种径向基神经网络模型在图书馆能耗监测上的应用

由于大多数建筑没有安装能耗监测设备,如何合理、准确地制定节能措施以及实现科学化管理是一个比较困难的问题.针对这一问题,本文将日最高温度、工作时间、湿度、太阳辐射、人员密度作为影响图书馆能耗的主要因素,构建了基于径向基神经网络的能耗数据分析网络,并证明了径向基神经网络具有良好的拟合性能.为降低图书馆能耗的节能措施的制定和节能管理提供可靠依据.     

非编网络的管理维护

非线性编辑技术,从非编单机到非编网络,现在已经发展到兼有高清功能的数字非线性编辑网络技术。阐述了电视非编网络的系统结构、技术要求,对电视台在非编网络建设和使用过程中的设备选型、系统架构及管理维护方面的问题做一些讨论。     

绿色电感元件制造技术探讨

分析了制造业对环境的影响,介绍了绿色制造的概念及内涵,研究了产品从设计、材料选择、生产、包装、使用到废弃处理整个生命周期中的绿色制造关键技术。     

Overcoming Hypoxia by Multistage Nanoparticle Delivery System to Inhibit Mitochondrial Respiration for Photodynamic Therapy

Hypoxia, as characterized by the low local oxygen, confers on cancer cells resistance to oxygen‐consuming photodynamic therapy (PDT). The limited success reached by current approaches harnessing reoxygenation to enhance PDT outcome promotes the reconsideration of the design of the therapeutic approach. In this study, a multistage delivery system capable of reversing hypoxia is demonstrated. Unlike previous strategies that only expect to affect the peripheral tumor tissue, the size‐shrinkable system allows those deeply located hypoxia regions to be treated. Specifically, therapeutics, including atovaquone and indocyanine green derivatives that are respectively responsible for oxidative phosphorylation blockage and PDT, are encapsulated in a gelatin nanoparticle, whose structure would rupture to promote deep penetration when facing matrix metallopeptidase 2 enzyme overexpression in tumor tissue. The antihypoxic performance of the platform has been evaluated using a variety of analyses including flow‐cytometry assay, immunofluorescence, and micro‐positron‐emission tomography imaging. Tumor regression in animal models confirms the feasibility and effectiveness of conquering the PDT‐resistance through abrogating the oxygen consumption. It is hopeful that such a strategy could shed light on the development of next‐generation PDT‐adjuvant treatment.     

Experimental investigation of hollow-core photonic crystal fibers with five photonic band-gaps

The hollow-core photonic crystal fibers （HC-PCFs） with integrity structure have been fabricated with an improved twice stack-and-draw technique. The transmission spectrum shows that five photonic band-gaps within 450-1100 nm have been obtained.And the green fight transmission in the HC-PCFs has been observed remarkably.     

不同产地信息茶叶的红外光谱分析

通过规范化的标准检测, 制备样品并获取样品的标准红外光谱, 分别得到了几种中国名茶的标准红外光谱图。为了更全面地了解这些茶叶的整体地域特征, 建立了红外光谱分析的平均偏离方法, 对光谱图进行了的直观分析, 而且还探讨了平均偏离大小与茶叶产地纬度的关系。研究表明, 产地纬度相近的茶叶, 平均偏离小; 产地纬度相差大的茶叶, 平均偏离大。因此茶区的海拔高度和纬度与茶叶的产地信息有着密切关系, 平均偏离有可能成为分析茶叶产地信息的强有力的方法。     

LTCC流延生瓷带的力学性能

选择邻苯二甲酸二丁酯(DOP)和聚乙二醇(PEG)作为复合增塑剂,采用流延法制备生瓷带。研究复合增塑剂中PEG和固含量对浆料黏度及生瓷带力学性能的影响。结果表明,复合增塑剂的增塑效果优于单组分增塑剂。随着PEG含量的增加,生瓷带拉伸强度减小,断裂伸长率先增大后减小;生瓷带的拉伸强度和断裂伸长率随固含量的升高而降低。当增塑剂中w(PEG)为30.0%～70.0%,w(固含量)为86.5%～87.3%时,生瓷带拉伸强度约为1.94MPa,断裂伸长率约为12.07%。