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Ultralight porous poly(vinylidene fluoride)-graphene nanocomposites with compressive sensing properties

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Nano Research 2021年第8期14卷 2620-2629页

作者： Seyed Mohsen Seraji Xing Jin Zhifeng Yi Chunfang Feng nisa V.Salim Institute for Frontier Materials Deakin UniversityWaurn PondsVIC 3216Australia Mechanical Engineering and Product Design Engineering Manufacturing Futures Research Institute Swinburne University of TechnologyHawthornVIC 3122Australia

Compressible sensors with highly porous features are ideal candidates for sports and wearable *** study demonstrated for the first time,how the crystalline transformation of poly(vinylidene fluoride)(PVDF)influences aerogel formation and also the compressible sensing properties of a graphene *** the present study,two feasible synthesis methods are demonstrated for the fabrication of both PVDF/graphene foams and aerogels with high sensitivity.A three-dimensional network of the PVDF/graphene foams and aerogels is prepared by gelation induced crystallization of PVDF/cyclohexanone by adjusting temperature and ***,PVDF/graphene foams and aerogels with density range of 0.11-0.17 g·cm^(-3) were *** compressive behaviour of PVDF/graphene aerogels was compared with PVDF/graphene foam *** of 20 wt.%graphene in PVDF aerogel improved the compressive strength significantly by 12 *** electromechanical performance of foams and aerogels shows that the PVDF/20g(g represents graphene)foam sample has high sensitivity of 396.7 kPa^(-1) to the pressure higher than 400 kPa,while PVDF/40g aerogels have a sensitivity value of 3.0×10^(-3) kPa^(-1) in pressure range lower than 500 *** results provide new pathways to fabricate porous composite with lighter density with high mechanical and electrical properties.

关键词： porous composite poly(vinylidene fluoride)(PVDF) graphene foam aerogel

Optimization of Nutrients in Fermentative Lactic Acid Production Using Oil Palm Trunk Juice as Substrate

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Advances in Bioscience and Biotechnology 2014年第12期5卷 957-965页

作者： nisa Saelee Klanarong Sriroth Department of Biotechnology Faculty of Agro-Industry Kasetsart University Bangkok Thailand Department of Biotechnology Institute of Agricultural Technology Walailak University Nakhon Si Thammarat Thailand

Complex nutrients e.g. carbon, nitrogen, peptides, vitamin and salts significantly play important roles in lactic acid production efficiency depending on types of microorganism and sources of raw material. In this study oil palm trunk juice and Lactobacillus rhamnosus TISTR 108 (ATTC 10863) were utilized for lactic acid production. Additional nutrients including peptone, yeast extract and mixed salts were tested. Response surface methodology involving Box Behkhen Design (BBD) was applied to examine the optimal condition. Prediction of optimization was performed using full quadratic regression equation. The predicted maximum lactic acid concentration was obtained at 64.05 g·l-1 within a period of 48 h under an optimal condition of 10 g·l-1 peptone with mixed salts containing 0.4 g·l-1 MgSO4·7H2O, 0.1 g·l-1 MnSO4·4H2O, 3 g·l-1 K2HPO4, 3 g·l-1 KH2PO4 and 3 g·l-1 CH3COONa·3H2O in 250 ml shake flask using CaCO3 as a titrant. Verification of optimization condition was performed in 2 l fermenter using Ca(OH)2 as neutralizing agent. Increase in lactic acid fermentation was achieved at 92.81 g·l-1 at 48 h cultivation. The lactic acid yield and volumetric productivity were 0.94 g·g-1 and 1.91 g l-1·h-1, respectively. This suggests that OPT juice is potentially used as carbon and nutrient sources for lactic acid production.

关键词： Lactic Acid Oil Palm Oil Palm Trunk Juice OPT Lactobacillus rhamnosus Box Behkhen Design BBD

Synthesis,Crystal Structure and Spectroscopic Properties of 1,2-Benzothiazine Derivatives:An Experimental and DFT Study

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Chinese Journal of Structural Chemistry 2015年第1期34卷 15-25页

作者： MUHAMMAD Nadeem Arshad TARIQ Mahmood ATHER Faroque Khan MUHAMMAD Zia-Ur-Rehman ABDULLAH M.Asiri ISLAM Ullah Khan RIFFAT-Un-nisa KHURSHID Ayub AZAM Mukhtar MUHAMMAD Tariq Saeed Chemistry Department Faculty of ScienceKing Abdulaziz University Centre of Excellence for Advanced Materials Research (CEAMR) King Abdulaziz University Department of Chemistry COMSATS Institute of Information TechnologyAbbottabad IRCBM COMSATS Institute of Information Technology Applied Chemistry Research Center PCSIR Laboratories ComplexFerozpur RoadLahore 54600Pakistan Materials Chemistry Laboratory Department of ChemistryGC University Department of Chemistry College of ScienceKing Faisal University Department of Chemistry University of EducationOkara CampusOkara-Pakistan

1,2-Benzothiazine derivatives methyl 3-methoxy-4-oxo-3,4-dihydro-2H-benzo[e] [1,2]thiazine-3-carboxylate 1,1-dioxide（1） and methyl 2-ethyl-3-hydroxy-4-oxo-3,4-dihydro-2Hbenzo[e][1,2]thiazine-3-carboxylate 1,1-dioxide（2） were synthesized, and characterized by spectroscopic techniques; 1H-NMR and infrared（IR） spectroscopy. Crystals of 1 and 2 were grown by slow evaporation of methanol and ethyl acetate, respectively and their crystal structures were investigated by single-crystal X-ray diffraction analysis. geometric properties were calculated by the B3 LYP method of density functional theory（DFT） at the 6-31g＋（d） basis set to compare with the experimental data. Simulated properties were found in strong agreement with the experimental ones. Intermolecular forces have also been modeled in order to investigate the strength of packing and strong hydrogen bonding was observed in both compounds 1 and 2. Electronic properties such as Ionization Potential（IP）, Electron Affinities（EA） and coefficients of the highest occupied molecular orbital（HOMO） and the lowest unoccupied molecular orbital（LUMO） of com- pounds 1 and 2 were simulated for the first time.

关键词： 1,2-benzothiazine B3LYP/6-31+g (d) density functional theory (DFT) HUMO-LUMO crystal structures

Distinctive and complementary roles of E2F transcription factors during plant replication stress responses

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Molecular Plant 2023年第8期16卷 1269-1282页

作者： Maherun nisa Thomas Eekhout Clara Bergis Jose-Antonio Pedroza-garcia Xiaoning He Christelle Mazubert Ilse Vercauteren Toon Cools Rim Brik-Chaouche Jeannine Drouin-Wahbi Layla Chmaiss David Latrasse Catherine Bergounioux Klaas Vandepoele Moussa Benhamed Lieven De Veylder Cécile raynaud Universite Paris-Saclay CNRSINRAEUniversite EvryInstitute of Plant Sciences Paris-Saclay(IPS2)91190 Gif-sur-YvetteFrance Universite de Paris Cite CNRSINRAEInstitute of Plant Sciences Paris-Saclay(IPS2)91190 Gif-sur-YvetteFrance Department of Plant Biotechnology and Bioinformatics Ghent University9052 GhentBelgium Center for Plant Systems Biology VIB9052 GhentBelgium Present address:Plant Molecular and Cellular Biology Laboratory Salk Institute for Biological StudiesLa JollaCA 92037USA

Survival of living organisms is fully dependent on their maintenance of genome integrity,being permanently threatened by replication stress in proliferating *** the plant DNA damage response(DDR)regulator SOg1 has been demonstrated to cope with replication defects,accumulating evidence points to other pathways functioning independent of ***,we report the roles of the Arabidopsis E2FA and EF2B transcription factors,two well-characterized regulators of DNA replication,in plant response to replication *** a combination of reverse genetics and chromatin immunoprecipitation approaches,we show that E2FA and E2FB share many target genes with SOg1,providing evidence for their involvement in the *** of double-and triple-mutant combinations revealed that E2FB,rather than E2FA,plays the most prominent role in sustaining plant growth in the presence of replication defects,either operating antagonistically or synergistically with ***,SOg1 aids in overcoming the replication defects of E2FA/E2FB-deficient ***,our data reveal a complex transcriptional network controlling the replication stress response in which E2Fs and SOg1 act as key regulatory factors.

关键词： replication stress E2F SOg1 cell cycle Arabidopsis

Species composition and abundance of dinoflagellates from the coastal waters of Pakistan

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Journal of Coastal Life Medicine 2016年第6期4卷 448-457页

作者： Sonia Munir Tahira Naz Zaib-un-nisa Burhan Pirzada Jamal Ahmed Siddiqui Steve Larry Morton Marine Science and Engineering Department Tianjin University of Science and TechnologyTianjinChina Centre of Excellence in Marine Biology University of Karachi75270 KarachiPakistan NOAA 219 Fort Johnson roadCharleston SC29412USA

Objective:To assess the community structure,seasonal dynamics of dinoflagellates population with environmental conditions in the nutrient-rich and polluted coastal waters off,***:Sampling sites were located from Karachi harbour(Station A)and Mouth of Manora Channel(Station B).Total 180 replicate samples were collected at 1-m depth through Niskin bottle sampler(1.7 L)and fixed with 2%lugol’s preservative then examined under light inverted microscopy,scanning electron and epiflourescence ***:The environmental conditions,such as temperature[(20-27)°C],salinity[(35-40)psu],chlorophyll a[(1-103)μg/L],pH(6.03-8.13)and dissolve oxygen[(0.7-5.5)mg/L]were recorded from both stations.A total of 96 species were identified into potential harmful toxic/non-toxic bloom forming species and cysts *** dinoflagellate cells between two coastal sites were much concentrated at the adjacent area of mouth of Manora Channel compare to harbor *** dinoflagellate cell concentration ranging from 20 to~55000 cells/L and the maximum values observed in two season,(~55000 cells/L)in autumn and(~3000 cells/L)in winter *** *** the predominant taxa with the maximum abundance(48166 cells/L)observed in autumn season following by Scrippsiella trochoidea(1200 cells/L),Alexandrium ostenfeldii(3000 cells/L)in winter season,and Ceratium furca(640 cells/L),Protoperidinium steinii(780 cells/L),Ceratium fusus(906 cells/L),Pyrophacus steinii(840 cells/L),gonyaulax spinifera(666 cells/L),Alexandrium tamarense(520 cells/L)and Dinophysis caudata(393 cells/L)in summer and spring ***,abundance of dinoflagellates correlated significant to chlorophyll a with chlorophyll a and temperature but inverse relation to salinity and pH observed from both ***:The present study reports on the prevalence and significance of harmful algae bloom forming taxa in the area which would be available for the coastal zone managers and fishery indust

关键词： Seasonality Dinoflagellate population Environmental condition Karachi coast

Fe(Ⅲ)-Asp-SiW_(12)O_(40)复合物异相催化光-Fenton反应降解偶氮类染料

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山东化工 2021年第19期50卷 283-285,287页

作者：李楠柳傲雪周瑞程建文屯妮萨昌吉学院化学与应用化学系新疆昌吉831100

以氯化铁、天冬氨酸、硅钨酸为主要原料,采用溶液沉淀法制备了Fe(Ⅲ)-Asp-SiW_(12)O_(40)复合物,使用红外光谱(IR)、X射线衍射(XRD)对该复合物进行了结构表征,并以偶氮类染料为目标污染物,考察了其光-Fenton反应降解效果。研究表明:复... 详细信息

以氯化铁、天冬氨酸、硅钨酸为主要原料,采用溶液沉淀法制备了Fe(Ⅲ)-Asp-SiW_(12)O_(40)复合物,使用红外光谱(IR)、X射线衍射(XRD)对该复合物进行了结构表征,并以偶氮类染料为目标污染物,考察了其光-Fenton反应降解效果。研究表明:复合物为无定形态,多酸阴离子保持了Keggin骨架结构,且该复合物催化剂对甲基橙溶液具有较好的降解活性。最佳光催化降解甲基橙条件为100 mL 50 mg·L^(-1)甲基橙溶液中加入0.40 mL 30%H_(2)O_(2),0.0800 g复合物,450 W高压汞灯照射40 min,甲基橙降解率可达到98%。

关键词：异相光催化偶氮类染料降解废水处理

德国肉用美利奴羊BMPR-IB、BMP15和gDF9基因10个突变位点的多态性检测分析

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南京农业大学学报 2012年第3期35卷 114-120页

作者：左北瑶钱宏光刘佳森李蕴华乌云毕力克艾肯江应诗家王子玉努尔尼沙王旭郭志勤王锋南京农业大学动物胚胎工程技术中心江苏南京210095 新疆巴州畜牧工作站新疆库尔勒841000 内蒙古自治区农牧业科学院内蒙古呼和浩特010031 新疆巴州种畜场新疆博湖841400 新疆畜牧科学院农业部家畜繁育生物技术重点开放实验室新疆乌鲁木齐830000

以影响不同绵羊品种产羔数的BMPR-IB、BMP15和gDF9基因作为候选基因,采用连接酶检测反应(LDR)法,检测10个突变位点在德国肉用美利奴羊上的多态性及其对产羔数的影响。结果表明:在德国肉用美利奴羊中未发现BMPR-IB基因的FecB突变和BMP15... 详细信息

以影响不同绵羊品种产羔数的BMPR-IB、BMP15和gDF9基因作为候选基因,采用连接酶检测反应(LDR)法,检测10个突变位点在德国肉用美利奴羊上的多态性及其对产羔数的影响。结果表明:在德国肉用美利奴羊中未发现BMPR-IB基因的FecB突变和BMP15基因的FecXI、FecXB、FecXL、FecXH、FecXg、FecXR突变及gDF9基因的FecgH(g8)、FecTT突变,但在gDF9上检测到g1突变,该突变处于Hardy-Weinberg平衡状态,达到中度多态水平,但其多态性与产羔数无显著性相关。

关键词：德国肉用美利奴羊繁殖力 BMPR-IB gDF9 BMP15