检索结果-南通市图书馆

Histological Effect of Viola Odorata Methanolic Extract and Methotraxate Induced in Albino Male Mice

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 Pharmacy and Pharmacology 2019年第5期7卷 270-277页

作者： Farah t.O.Al-jumaili Sura Alaa Soud mays talip Abdalla Ruqaya M.Al-Ezzy Mohammed Bdaiwy Hassan Departement of Molecular and Medical Biotechnology College of BiotechnologyAl-Nahrain UniversityBaghdadIraq Microbiology Departement College of ScienceAl-Kharakh UniversityBaghdadIraq AlYarmook teaching hospital BaghdadIraq

the objective of this study was to considere as an explorer for in vivo studies on the production of some secondary metabolites from local medical plants named Viola odorata. Viola odorata commonly known as “garden violet or sweet violet” belongs to family Violaceae, is a slow growing perennial, with stout rootstock, grows in hedgerows, rough land and margins of woodland. 200 mg/kg of methanol extract for V. odorata was interacted with methotrexate as a drug in albino mice to see the healing capacity for this extract. Different organs were used such as intestine, kidney, spleen, and testes for this experiment. Each organ response was recorded in this experiment. Histopathological section in the intestine of animal treated with MtX and plant showed hypertrophy and hyperplasia of goblet cells and increased cellularity of lamna properia while Histopathological section in the testes of animal treated with MtX and plant showed no sperm in the seminiferous tubules of epididymis with the round multi-nuclei cell in the lumen accompanied by homogeneous material and cellular debris while Histopathological section in the spleen of animal treated with MtX and plant proliferation of lymphocytes in the periarteriolar sheath and proliferation of mononuclear cells around sinus in red pulp and Histopathological section in the kidney of animal treated with MtX and plant mononuclear cells aggregation in the interstitial tissue mainly around blood vessels and in the adipose tissue and renal tubules. Other sections showed hydropic degeneration of renal tubules.

关键词： Medicinal plants methotrexate methanolic extract violin

C_4 Plants as Biofuel Feedstocks: Optimising Biomass Production and Feedstock Quality from a Lignocellulosic Perspective

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 Integrative Plant Biology 2011年第2期53卷 120-135页

作者： Caitlin S.Byrt Christopher P.L.Grof Robert t.Furbank School of Environmental and Life Sciences University of NewcastleUniversity Drive CSIRO Plant Industry and High Resolution Plant Phenomics Centre

the main feedstocks for bioethanol are sugarcane （Saccharum offic- inarum） and maize （Zea mays）, both of which are C4 grasses, highly efficient at converting solar energy into chemical energy, and both are food crops. As the systems for lignocellulosic bioethanol production become more efficient and cost effective, plant biomass from any source may be used as a feedstock for bioethanol production. thus, a move away from using food plants to make fuel is possible, and sources of biomass such as wood from forestry and plant waste from cropping may be used. However, the bioethanol industry will need a continuous and reliable supply of biomass that can be produced at a low cost and with minimal use of water, fertilizer and arable land. As many C4 plants have high light, water and nitrogen use efficiency, as compared with C3 species, they are ideal as feedstock crops. We consider the productivity and resource use of a number of candidate plant species, and discuss biomass ＇quality＇, that is, the composition of the plant cell wall.

关键词： C4 Plants as Biofuel Feedstocks Optimising Biomass Production and Feedstock Quality from a Lignocellulosic Perspective

Differences in Physiological Age Affect Diagnosis of Nitrogen Deficiencies in Cornfields

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2008年第5期18卷 545-553页

作者： J. ZHANG A. M. BLACKMER t. M. BLACKMER Statistical Consulting Center Wright State University 3640 Colonel Glenn Highway Dayton Ohio 45435 （USA）. Department of Agronomy Iowa State University Ames Iowa 50011 （USA） Iowa Soybean Association 4554 114th Street Urbandale Iowa 50322 （USA）

Many studies have shown that chlorophyll meter readings(CMRs) can be used to diagnose deficiencies of nitrogen(N) during the growth of corn(Zea mays L.) in small-plot trials,but there is need to address additional problems encountered when diagnoses are made in fields of the size managed in production agriculture. A noteworthy difference between smallplot trials and production agriculture is the extent to which the effects of N are confounded with the effects of other factors such as tillage,landscape,soil organic matter and moisture content. We illustrate how some of these factors can cause differences in the physiological age of plants and introduce errors in the diagnoses of N deficiencies. We suggest methods(measuring the height to the youngest leaf collar and assigning leaf numbers by using the first leaf with pubescence and the ear leaf as references to identify growth stages) for minimizing these errors. the simplified method of growth stage identification can be used to select appropriate plants and leaves for making diagnoses in fields and to distinguish the effects of N from the effects of other factors that infiuence plant growth.

关键词：玉米叶绿素氮缺乏重量年龄

Impact of tillage and Fertilizer Application Method on Gas Emissions in a Corn Cropping System

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2012年第5期22卷 604-615页

作者： K. SMItH D. WAttS t. WAY H. tORBERt S. PRIOR Department of Math Science and Technology University of Minnesota Crookston Crookston MN 56716 (USA) USDA-ARS National Soil Dynamics Laboratory 411 S. Donahue Dr. Auburn AL 36832 (USA)

tillage and fertilization practices used in row crop production are thought to alter greenhouse gas emissions from soil. this study was conducted to determine the impact of fertilizer sources, land management practices, and fertilizer placement methods on greenhouse gas (CO2, CH4, and N2O) emissions. A new prototype implement developed for applying poultry litter in subsurface bands in the soil was used in this study. the field site was located at the Sand Mountain Research and Extension Center in the Appalachian Plateau region of northeast Alabama, USA, on a Hartsells fine sandy loam (fine-loamy, siliceous, subactive, thermic typic Hapludults). Measurements of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) emissions followed GRACEnet (greenhouse gas reduction through agricultural carbon enhancement network) protocols to assess the effects of different tillage (conventional vs. no-tillage) and fertilizer placement (subsurface banding vs. surface application) practices in a corn (Zea mays L.) cropping system. Fertilizer sources were urea-ammonium nitrate (UAN), ammonium nitrate (AN) and poultry litter (M) applied at a rate of 170 kg ha-1 of available N. Banding of fertilizer resulted in the greatest concentration of gaseous loss (CO2 and N2O) compared to surface applications of fertilizer. Fertilizer banding increased CO2 and N2O loss on various sampling days throughout the season with poultry litter banding emitting more gas than UAN banding. Conventional tillage practices also resulted in a higher concentration of CO2 and N2O loss when evaluating tillage by sampling day. throughout the course of this study, CH4 flux was not affected by tillage, fertilizer source, or fertilizer placement method. these results suggest that poultry litter use and banding practices have the potential to increase greenhouse gas emissions.

关键词：温室气体排放量耕作方式施肥方法裁剪系统玉米间套作 CH4通量家禽粪便

Preparation of plasma membrane of sperm cells of Zea mays and preliminary analysis of membrane protein

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1995年第13期40卷 1115-1119页

作者：张一洪杨中汉 t.H.曹宗巽 College of Life Science Peking University Beijing 100871 China

Just like in animals, the essence of fertilization process in plants is the fusion of male andfemale gametes. Although it is already possible, with the aid of cytological manipulation, toachieve in vitro fusion of isolated egg and sperm cell to form zygote, it remains to be solvedwhether the fusion of male and female gametes in nature is at random or there exists some kindof 'recognition'.

关键词： sucrose gradient ultracentrifugation organelle marker enzyme SDS-PAGE.

Can Hydro-Priming Improve Germination Speed, Vigour and Emergence of Maize Landraces under Water Stress？

在线全文

学校读者我要写书评

暂无评论

Journal of Agricultural Science and technology(B) 2011年第1期1卷 20-28页

作者： t. Mabhaudhi A. t. Modi Crop Science Department School of Agricultural Sciences and Agribusiness Faculty of Science and Agriculture University of KwaZulu-Natal Private Bag X01 Scottsville 3209 Pietermaritzburg South Africa

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

不同放牧方式的比较试验

不同放牧方式的比较试验

Effects of Plant Residue Decomposition on Soil N Availability,Microbial Biomass and β-Glucosidase Activity During Soil Fertility Improvement in Ghana

“加强世界饲草——牲畜系统”第十四届国际草地会议

作者： R.E.BLASER J.t.JOHNSON F.MC CLAUGHERtY J.P.FONtENOt R.C.HAMMES JR. H.t.BRYANt D.D.WOLF D.A.mays 常小国 Virginia Polytechnic lnstitute and state University

放牧试验旨在改进和执行家畜放牧管理体系。第一个目的（试验1）是调查在固定和控制放牧条件下的动物生产;第二个目的（试验2）是研究在三种不同载畜量条件下的植物生产和覆盖度的特性。

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Pedosphere 2019年第5期29卷 608-618页

作者： Samuel t. PARtEY Robert B. Z0UGM0RE Naresh V. tHEVAtHASAN Richard F. PREZIOSI CGI AR CCAFS West Africa ProgramInternational Crops Research Institute for the Semi-Arid Tropics (ICRISAT)Bamako B.P. Box 320 (Mali) School of Environmental Sciences University of GuelphGuelph NIG 2W1 (Canada) Faculty of Life Sciences The University of ManchesterManchester M13 9PL (UK)

With limited use of inorganic fertilizers on smallholder farms,plant residues could be viable alternatives for soil fertility improvement.this study was conducted to determine how residue quality and decomposition of nine plant species influence soil N availability,microbial biomass,andβ-glucosidase activity during soil fertility improvement.Significant differences in N concentration were found among the species,ranging from 12.2 g kg-1 in Zea mays to 39.2 g kg-1 in Baphia nitida.the C/N ratio was the highest in Z.mays(34.4),whereas lignin and polyphenol concentrations were the greatest in Acacia auriculiformis.the highest decomposition rate(0.251%per day)occurred in tithonia diversifolia,and the lowest in A.auriculiformis,Albizia zygia,B.nitida,and Z.mays,with the half-lives of 28-56 d.Between 80%and 89%of N,P,K,Ca,and Mg were released from t.diversifolia in 7 d,compared with over 70%retention in A.auriculiformis,B.nitida,and Z.mays.the decomposition and nutrient release half-lives of Gliricidia sepium,Leucaena leucocephala,Azadirachta indica,and Senna spectabilis were less than 14 d.Soil mineral N,microbial biomass,andβ-glucosidase activity increased under all treatments,with t.diversifolia having the greatest effect.While N mineralization occurred in all of the species throughout the experiment,an initial N immobilization was recorded in the A.zy.gia,B.nitida,A.auriculiformis,and Z.mays treatments for up to 14 d.Decomposition and nutrient release rates,mineral N,soil microbial biomass,andβ-glucosidase activity were dependent on residue quality,and P and lignin levels,the lignin/N ratio,and the(lignin+polyphenol)/N ratio had the most significant effects(P≤0.05).

关键词： leguminous species litter quality microbial activity N mineralization nutrient release organic matter

Evaluation of maize inbred lines for resistance to pre-harvest aflatoxin and fumonisin contamination in the field

在线全文

学校读者我要写书评

暂无评论

the Crop Journal 2017年第3期5卷 259-264页

作者： Baozhu Guo Xiangyun Ji Xinzhi Ni Jake C.Fountain Hong Li Hamed K.Abbas Robert D.Lee Brian t.Scully United States Department of Agriculture-Agricultural Research Service(USDA-ARS) Crop Protection and Management Research UnitTiftonGAUnited States the University of Georgia Department of Plant PathologyTiftonGAUnited States Ecological Environment Protection Research Institute Shanghai Academy of Agricultural SciencesShanghaiChina USDA-ARS Crop Genetics and Breeding Research UnitTiftonGAUnited States Shanxi Academy of Agricultural Sciences Millet Research InstituteChangzhiChina USDA-ARS Biological Control of Pests Research UnitStonevilleMSUnited States the University of Georgia Department of Crop and Soil SciencesTiftonGAUnited States USDA-ARS U.S.Horticultural Research LaboratoryFort PierceFLUnited States

two important mycotoxins, aflatoxin and fumonisin, are among the most potent naturally occurring carcinogens, contaminating maize(Zea mays) and affecting crop yield and quality.Resistance of maize to pre-harvest mycotoxin contamination, specifically aflatoxin produced by Aspergillus flavus and fumonisin produced by Fusarium verticillioides, is a goal in breeding programs that screen for these important traits with the aim of developing resistant commercial hybrids. We conducted two years of field evaluations on 87 inbred lines originating primarily in China and Mexico and not previously screened for resistance.the objectives of our study were to identify resistant germplasm for breeding purposes and to examine possible relationships between resistances to the two mycotoxins. Aflatoxin and fumonisin were present in samples harvested from all lines in both years.Concentrations of total aflatoxin ranged from 52.00 ± 20.00 to 1524.00 ± 396.00 μg kg^(-1),while those of fumonisin ranged from 0.60 ± 0.06 to 124.00 ± 19.50 mg kg^(-1). the inbred lines tUN15, tUN61, tUN37, CY2, and tUN49 showed the lowest aflatoxin accumulation and CN1, Gt601, tUN09, tUN61, and MP717 the lowest fumonisin accumulation. tUN61 showed the lowest accumulation of both mycotoxins. this study confirmed previous observations that high levels of aflatoxin can coexist with fumonisin, with 55 maize lines showing a positive correlation coefficient between the concentrations of aflatoxin and fumonisin and 32 lines showing a negative correlation coefficient. these selected lines,particularly tUN61, may provide sources of resistance to mycotoxin contamination in breeding programs. However, the mechanism of resistance in this germplasm remains to be identified. Future research should also address factors that influence the fungus–plant interaction, such as herbivory and environmental stress.

关键词： Aflatoxin Fumonisin Inbredline Maize Mycotoxin