检索结果-南通市图书馆

Antibacterial hydrogel with pH-responsive microcarriers of slow-release VEGF for bacterial infected wounds repair

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第13期144卷 198-212页

作者： Xiaofei Xie Huan Lei Daidi Fan Shaanxi Key Laboratory of Degradable Biomedical Materials School of Chemical EngineeringNorthwest UniversityXi’an 710069China Shaanxi R&D Center of Biomaterials and Fermentation Engineering School of Chemical EngineeringNorthwest UniversityXi’an 710069China Biotech.&Biomed.Research Institute Northwest UniversityXi’an 710069China

Bacterial infection causes wound inflammation and makes angiogenesis *** is urgent to develop effectively antibacterial and pro-vascularizing dressings for wound *** hydrogel is developed with pH-responsive drug-releasing microcarriers which were loaded with vascular endothelial growth factor(VEGF)that promotes angiogenesis and actively respond to wound pH for control and prolong VEGF *** surfaces of the microcarriers were coated with polydopamine which can reduce the silver nanoparticles(AgNPs)in situ,and dynamically crosslink with the polyacrylamide,which forms a stable slow-release system with different release behavior for the VEGF and *** hydrogel inhib-ited bacterial formation and accelerated wound *** the hydrogel dressing,83.3%±4.29%of the wound heals at day 7,which is 40.9%±8.5%higher than the non-treatment group in defect infected *** antibacterial properties of hydrogel down-regulate early inflammation-related cytokines,and the release of VEGF in the middle and late phases of wound healing in response to pH changes pro-motes angiogenesis and up-regulate the expression of angiogenesis-associated *** sequential release of antibacterial agents and pro-vascularizing agents in response to the change in wound microen-vironmental cues facilitate temporally controlled therapy that suites the need of different wound healing ***,the hydrogel loaded with multifunctional microcarriers that enable controlled release of AgNPs and VEGF is an effective system for treating infected wounds.

关键词： Antibacterial pH-responsive microcarriers slow-release Infected wound repair

Effects of slow-release urea fertilizers on urease activity, microbial biomass, and nematode communities in an aquic brown soil

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2005年第Z1期48卷 26-32页

作者： JIAO Xiaoguang, LIANG Wenju, CHEN Lijun, ZHANG Haijun, LI Qi, WANG Peng & WEN Dazhong Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China Shenyang Experimental Station of Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China Graduate School of Chinese Academy of Sciences, Beijing 100039, China Key Laboratory of Terrestrial Ecological Process Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016China Shenyang Experimental Station of Ecology Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China Graduate School of Chinese Academy of Sciences Beijing 100039 China Key Laboratory of Terrestrial Ecological Process Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016China Shenyang Experimental Station of Ecology Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China Shenyang Experimental Station of Ecology Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China Graduate School of Chinese Academy of Sciences Beijing 100039 China Key Laboratory of Terrestrial Ecological Process Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016China Graduate School of Chinese Academy of Sciences Beijing 100039 China Shenyang Experimental Station of Ecology Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China

A field experiment was carried out at the Shenyang Experimental Station of Ecology (CAS) in order to study the effects of slow-release urea fertilizers high polymer-coated urea (SRU1), SRU1 mixed with dicyandiamide DCD (SRU2), and SRU1 mixed with calcium carbide CaC2 (SRU3) on urease activity, microbial biomass C and N, and nematode communities in an aquic brown soil during the maize growth period. The results demonstrated that the application of slow-release urea fertilizers inhibits soil urease activity and increases the soil NH4+-N *** available N increment could promote its immobilization by microorganisms. Determination of soil microbial biomass N indicated that a combined application of coated urea and nitrification inhibitors increased the soil active N pool. The population of predators/omnivores indicated that treatment with SRU2 could provide enough soil NH4+-N to promote maize growth and increased the food resource for the soil fauna compared with the other treatments.

关键词： slow-release urea, urease activity, microbial biomass, nematode community, aquic brown soil.

Nitrogen deposition and release pattern of slow release fertiliser made from urea-impregnated oil palm frond and rubberwood chips

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2019年第6期30卷 2087-2094页

作者： Nur Nabilah Abdul Khalid Zaidon Ashaari Ahmad Husni Mohd.Hanif Azmy Mohamed Seng Hua Lee Department of Forest Production Faculty of ForestryUniversiti Putra Malaysia(UPM)43400 UPM SerdangSelangorMalaysia Institute of Tropical Forestry and Forest Products Universiti Putra Malaysia(UPM)43400 UPM SerdangSelangorMalaysia Department of Land Management Faculty of AgricultureUniversiti Putra Malaysia(UPM)43400 UPM SerdangSelangorMalaysia

The fertiliser industry faces a continuing challenge to improve the efficiency of their products,particularly of nitrogenous fertilisers,and to minimise adverse ***,a new slow release fertilizer,ureaimpregnated woodchips from tropical plant biomass(oil palm frond and rubberwood),was *** morphology of the impregnated woodchips was investigated by scanning electron microscopy and the success of impregnation of urea and nitrogen deposition into the woodchips was confirmed by energy dispersive X-ray *** nitrogen release patterns from impregnated woodchips fertiliser were simulated using a soil solution and distilled water as leaching solutions in a static condition for 768 h,release was slow and steady,although the release rate was lower in distilled water than in the soil solution.

关键词： Woodchips fertilizer slow-release Urea release pattern Nitrogen deposition

Used for the Study of Nitrogen Fertilizer slow-release Carrier Life Sludge

在线全文

学校读者我要写书评

暂无评论

矿物学报 2013年第S1期33卷 46-46页

作者： LI Junlong XIE Peng YAN Fangfang QIU Qing FENG Qiming Key Laboratory of Solid Waste Treatment and Resource Recycle SWUSTMinistry of Education

After the sewage treatment, putting the wet sludge in which the heavy metal content is extremely low, corrupt and broken straw, bentonite, urea in proportioning according to the certain ratio, mixing well-distributed, taking the shape of Nitrogen slow-release fertilizers, doing the dynamic bioleaching test by the method of Artificial rainfall simulation, researching the slow-release characteristic, water retention. When the mass ratio of the wet sludge whose water content is 82.5%: bentonite: corrupt and broken straw: urea is 62.5: 12.5: 12.5: 12.5, drip washing the 10g Nitrogen slow-release fertilizers by the 80ml distilled water after 48h, the residue rate of urea is 29.63%; Under the room temperature of 25 ℃, 77%RH, moisture evaporate 46.32% after 60 h. The results demonstrate that the slow-release fertilizer has a good release-effect of nitrogen and water conservation effect. It provides the basic for the development and application of the sewage in the aspect of Nitrogen slow-release fertilizers.

关键词： life sludge bentonite corrupt and broken straw urea nitrogen slow-release fertilizers

Control Effect of slow-release, Long-acting and Multi-functional New Pesticides on Sugarcane Borders and Woolly Aphids

在线全文

学校读者我要写书评

暂无评论

Agricultural Biotechnology 2018年第6期7卷 97-100页

作者： Wenfeng LI Rongyue ZHANG Xiaoyan WANG Hongli SHAN Jiong YIN Yonglei MAO Chao FANG Zhiming LUO Yingkun HUANG Sugarcane Research Institute Yunnan Province Academy of Agricultural Science Yunnan Kaimike Agricultural Technology and Service Co. Ltd.

In order to select the long-acting,low toxic,low-risk and multi-functional new pesticides for the control of sugarcane borders and woolly aphids and precise and efficient application technology,the control effect of 10% monosultap · thiamethoxam granular formulation and 1% Bt · clothianidin granular formulation on sugarcane borders and woolly aphids were *** results showed that 10% monosultap·thiamethoxam GR and 1% Bt·clothianidin GR had good control effects on sugarcane borders and woolly *** were ideal slow-release,long-acting,low toxic and multi-functional new pesticides used to control sugarcane borders and woolly *** could be used alternately with other pesticides to delay the emergence and development of pest resistance to *** best dosage of the two pesticides in the field was 45 kg/hm^*** could be mixed with fertilizer( 1200-1800 kg/hm^2),scattered in sugarcane ditches or at the base of sugarcane plants,and covered with soil or film from January to *** control effect on dead heart seedlings damaged by borers could be up to above 79.2%,and the control effect on sugarcane woolly aphids could reach more than 98.8%.In comparison with the control group,the actual yield and sugar content of sugarcane increased by above 41 555 kg/hm^2 and 6.5% *** application of slow-release,long-acting,strong systemic and multi-functional new agents with fertilizer around roots is convenient,precise and efficient,labor-saving,time-saving and environmentally friendly,and is worthy of being widely applied in sugarcane areas.

关键词： slow-release and long-acting agents Precise application of pesticides Sugarcane borders and woolly aphids Control effect

Studies on Pharmacokinetics of Porcine Somatotropin Liposomes

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2005年第2期21卷 187-190页

作者： XUChuan-lai JICheng HAOKai LIXiang-qian YAOHui-yuan SchoolofFoodScienceandTechnology SouthernYangtzeUniversityWuxi214036P.R.China CollegeofAnimalScienceandTechnology ChinaAgriculturalUniversityBeijing100094P.R.China

This paper focuses on the pharmacokinetics in fattening pigs as well as the change of serum resulting from the use of porcine somatotropin(PST) and its liposomes. A slow-release model was determined to be relevant to following an examination of all dynamic parameters. The results indicate that the slow-release effect of PST liposomes was significant, with an extended release time of over 7 d.

关键词： Porcine somatotropin(PST) liposomes Pharamacokinetics slow-release

Poly(lactic acid)-aspirin microspheres prepared via the traditional and improved solvent evaporation methods and its application performances

在线全文

学校读者我要写书评

暂无评论

中国化学工程学报:英文版 2023年第8期60卷 194-204页

作者： Xiaolin Pan Mengyuan Gao Yun Wang Yanping He Tian Si Yanlin Sun School of Chemical Engineering Kunming University of Science and TechnologyKunming 650504China

Drug-loaded microspheres are significant for the development of modern pharmaceutical products. It is well known that the taken of aspirin for long-term increases the risk of serious gastrointestinal complications, therefore a controllable delivery of aspirin is of importance to lighten those side effects. In this work, poly(lactic acid)(PLA) was chosen as the carrier to prepare PLA-aspirin microspheres by using the traditional and the improved solvent evaporation methods. It was found that no matter which experimental condition was, the encapsulation efficiency of aspirin was higher by using the improved method than that of the traditional method. Specifically, when the concentration of polyvinyl alcohol = 1%(mass),the polymer concentration = 1:20, the oil/water rate = 1:2.5, PLA-aspirin microspheres were obtained via the improved method with a high yield of 82.83%(mass) and an encapsulation efficiency of 44.09%. PLAaspirin microspheres were then prepared continuously using the improved method, which further enhanced the encapsulation efficiency to 54.56%. Approximate 85% aspirin released from microspheres within 7 days. Obvious degradation which was represented by reduction on hardness was observed by soaking microspheres in PBS for 60 days. This work is of interest because it provides a continuous route to prepare PLA-aspirin microspheres continuously with a high drug encapsulation efficiency.

关键词： Aspirin Degradation Foam-transfer Microspheres Poly(lactic acid) slow-release

Phase control of 2D binary hydroxides nanosheets via controlling-release strategy for enhanced oxygen evolution reaction and supercapacitor performances

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2019年第11期28卷 26-33页

作者： Min Wei Jing Li Wei Chu Ning Wang School of Chemical Engineering Sichuan UniversityChengdu 610065SichuanChina Collaboration Innovation Center of Chemistry for Energy Materials Xiamen UniversityXiamen 361005 FujianChina Department of Chemical Engineering Tsinghua UniversityBeijing 100084China Physical Sciences and Engineering Division King Abdullah University of Science and TechnologyThuwal 23955-6900Saudi Arabia

An OH^--slow-release strategy was established to controllably tune the( α-and β-) phase of nickel cobalt binary hydroxide in the presence of ammonium chloride. Ammonium chloride is added to the ionic solution to regulate the p H of the solution and slow down the release of OH^-, effectively regulating the phase, nanostructure, interlayer spacing, surface area, thickness, and the performance of binary Ni –Co hydroxide. The ion-slow-release mechanism is conducive to the formation of α-phase with larger interlayer spacing and thinner flakes rather than β-phase. Attributed to the enlarged interlayer spacing, thinner nanosheets, and more exposed active sites, the resultant α-phase hydroxides(NCNS-5.2), displayed much lower over potential of 285 mV with respect to the dense-stacked β-phase hydroxides(362 mV) for OER at 10 mA/cm^2. It also exhibited high specific capacitance of 1474.2 F/g, when tested at 0.5 A/g within a voltage range of 0–0.45 Vvs. Hg/Hg O. This composite was also stable for water oxidation reaction and supercapacitor. The proof-of-concept of using controlled-release agent may provide suggestive insights for the material innovation and a variety of applications.

关键词： slow-release strategy Layered double hydroxides(LDHs) Nanosheets Oxygen evolution reaction Supercapacitor

Short-Term Response of Soil Microbial Biomass to Different Chabazite Zeolite Amendments

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2018年第2期28卷 277-287页

作者： Giacomo FERRETTI Katharina Maria KEIBLINGER Dario DI GIUSEPPE Barbara FACCINI Nicolò COLOMBANI Sophie ZECHMEISTER-BOLTENSTERN Massimo COLTORTI Micòl MASTROCICCO Deptartment of Physics and Earth Sciences University of Ferrara Via Saragat 1 Ferrara 44122 (Italy) Institute of Soil Research Department of Forest and Soil Sciences University of Natural Resources and Life Sciences Vienna (BOKU) Peter Jordan Strasse 82 Vienna 1190 (Austria) Consorzio Nazionale Interuniversitario per le Scienze del Mare (CoNISMa) Piazzale Flaminio Roma 900196 (Italy) Department of Environmental Biological and Pharmaceutical Sciences and Technologies Second University of Naples Caserta 81100(Italy)

Zeolitites (ZTs) are rocks containing more than 50% of zeolite minerals and are known to be a suitable material for agricultural purposes by improving soil physicochemical properties and nitrogen (N) use efficiency. However, little is known about their effects on soil microbial biomass. This study aimed to evaluate short-term effects of different chabazite-rich ZT (CHAZT) amendments on soil microbial biomass and activity. A silty-clay agricultural soil was amended in three different ways, including the addition of natural (5% and 15%) and NH_4^+-enriched (10%) CHAZT. Soil dissolved organic carbon (C), total dissolved N, NH_4^+, NO_3^-, NO_2^-, microbial biomass C and N, and ergosterol were measured periodically over 16 d in a laboratory incubation. To verify the microbial immobilization of the N derived from NH_4^+-enriched CHAZT, a high15N source was used for enriching the mineral to measure the microbial biomass δ15N signature. An increase in the ergosterol content was observed in the soil amended with 5% natural CHAZT. However, no similar result was observed in the soil amended with 15% natural CHAZT, suggesting that the fungal biomass was favored at a lower CHAZT application rate. In the soil amended with NH+ 4-enriched CHAZT, microbial biomass N was related to NO_3^-production over time and inversely related to NH_4^+, suggesting high nitrification process. Isotopic measurements on microbial biomass confirmed immediate assimilation of N derived from NH_4^+-enriched CHAZT. These results suggested that the NH_4^+-enriched CHAZT used in this study supplied an immediately available N pool to the microbial biomass.

关键词： ergosterol microbial biomass δ15N natural zeolite NH4+-enriched zeolite nitrification slow-release fertilizer