Results 31 to 40 of about 335,325 (135)

Comparative Analysis of the Influence of Different Preparation Methods on the Properties of TEMPO-Oxidized Bacterial Cellulose Powder Films

open access: yesJournal of Natural Fibers
The preparation method of cellulose films plays a vital role in their properties. This work aims to characterize 2, 2, 6, 6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized bacterial cellulose powder (TOBCP) films prepared with three different methods ...
Dieter Rahmadiawan   +8 more
doaj   +1 more source

纤维素酶的液体发酵

open access: yes, 1994
用液体发酵对11株纤维素酶产生苗的产酶时间和水平进行了比较,两株里氏木霉、两株康氏木霉和一株土曲霉产纤维素酶活力较高,试验菌株的产酶高峰期除EBGA为8.5天少,其余酶均在11.5天以上。对产酶活力较高的两株菌进行了诱导底物和添加物试验,结果表明,未处理过的一些木质纤维素(稻草粉、麦秸粉和玉米芯粉等)对康氏木毒有明显的作用 ...
张发群   +1 more
core  

狭缝引导配体1-3’非翻译区抑制心肌成纤维细胞纤维化表型的作用

open access: yesZhongshan Daxue xuebao. Yixue kexue ban
目的研究狭缝引导配体1(Slit1)的3’非翻译区序列部分片段(Slit1-3’UTR)对心肌成纤维细胞的纤维化表型的调节作用和可能机制。方法利用腺病毒介导在ICR乳小鼠心肌成纤维细胞(mCFs)中过表达Slit1-3’UTR 1526nt序列(Slit1-3’UTR 1526nt),使用蛋白质免疫印迹技术评估mCFs中胶原Iα1/(COL1A1)、胶原IIIα1/(COL3A1)、α平滑肌肌动蛋白(α-SMA)等纤维化相关基因的表达水平,结合EdU和Trans ...
王娅   +7 more
doaj   +2 more sources

Bacterial Cellulose Crosslinked with Citrus Peel: A Multifunctional Leather Substitute

open access: yesJournal of Natural Fibers
Bacterial cellulose (BC) was crosslinked with citrus (Citrus junos and Citrus unshiu) peel to produce a colored, multifunctional leather substitute with enhanced mechanical strengths and flame retardancy.
Juneyoung Minn, Hyunjin Kim, Hye Rim Kim
doaj   +1 more source

纤维素分解复合菌系St-13的筛选及产酶条件的研究

open access: yes, 2009
从腐烂的枯枝落叶中分离到一组分解能力较强的纤维素分解复合菌系St-13,该复合菌系由平板可分离的细菌和难培养细菌组成。5d内可使滤纸完全崩溃,液体培养到14d时能够分解玉米秸秆中85.27%的纤维素,总失重率为58.03%。通过正交优化试验,确定该复合菌系的产酶最佳条件为:2%微晶纤维素,1.5%NaNO3,初始pH7.0,温度32℃;摇床培养48h时其CMCase为0.455IU ...
刘晓风   +7 more
core  

纤维素中空纤维气体分离膜及其制备

open access: yes, 2004
纤维素中空纤维气体分离膜及其制备,该膜为均质致密结构;其是采用一水N-甲基氧化吗啉为溶剂直接溶解纤维素,然后采用沉浸相转化法纺制成纤维素中空膜。制备过程如下:1)在80~110℃用80~93wt%的MMNO·H2O与纤维素混合溶解、脱泡,得纤维素浓度7~20wt%的透明铸膜液;2)用沉浸相转化法纺制中空膜;3)洗去膜中残留溶剂;4)在相对湿度40%~90%的空气中自然干燥,得干态中空膜。与传统的再生和改性纤维素膜相比,本发明中空膜在结晶度、机械强度、耐有机溶剂和耐酸碱能力方面均具有较好特性 ...
袁权, 介兴明, 林斌, 曹义鸣
core  

Using Static Culture Method to Increase the Production of Acetobacter Xylinum Bacterial Cellulose

open access: yesJournal of Natural Fibers
Bacterial cellulose is a natural polymer, usually produced through synthetic (chemically defined) or natural media. However, the current methods of bacterial cellulose production are not ideal because of their low productivity and large number of ...
Jialing Chen   +4 more
doaj   +1 more source

一种纤维素溶液及溶解纤维素的方法和再生纤维素

open access: yes, 2014
本发明涉及将纤维素在不发生衍生改性下溶于CO2开关型离子化合物或CO2开关型离子化合物与有机溶剂组成的混合体系中,在体系中加入各种反溶剂、或通过向体系中通入气体或通过加热的方式破坏CO2开关型溶剂的结构,溶解的纤维素以各种物理结构形式进行再生。通过调节CO2压力,以及选择可构成CO2开关型离子化合物的阳离子、阴离子的有机胺或醇或辅助有机溶剂的结构 ...
赵宗保, 谢海波
core  

生态护坡基质中微生物特性研究

open access: yesShuitu Baochi Xuebao, 2008
以土壤、水泥、沙子、秸秆、草炭、纤维素、锯末、糠醛渣、保水剂、控施肥和速效肥为基本原料,按不同比例配制成3种生态护坡基质,探讨了其中微生物的种类和数量以及随时间的动态变化。结果表明:3种生态护坡基质中细菌、放线菌、真菌数量依次为109,108~109,106cfu/g数量级,分别比对照土壤高101,101~102,101个数量级;随时间变化,3种生态护坡基质中细菌数量起初有所下降,之后逐渐增加,最后呈稳定状态,其变化趋势与微生物总数一致,放线菌数量逐渐增加,并对微生物总数贡献提高,而真菌数量逐渐减少 ...
孙其远   +4 more
doaj  

Effects of straw returning combined with decomposing microbial agents on ecosystem multifunctionality of paddy soils(秸秆还田配施腐解菌剂对稻田土壤生态系统多功能性的影响)

open access: yes浙江大学学报. 农业与生命科学版
Crop straw is an important resource for improving soil fertility. However, its decomposition rate under natural conditions is slow due to the presence of recalcitrant components such as cellulose and lignin.
XU Bang(徐棒)   +8 more
doaj   +1 more source

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