检索结果-南通市图书馆

Appr.ach for.C1 to C2 pr.ducts commencing fr.m car.on dioxide: A br.ef r.view

PETr.LEUM 2024年第3期10卷 373-398页

作者： Dey, G. r. Bhabha Atom r.s Ctr Radiat & Photochem Div Mumbai 400085 India Homi Bhabha Natl Inst Mumbai 400094 India

The car.on dioxide (CO2) conver.ion to useable compounds r.mains a gr.at contest to scientists, engineer., and envir.nmentalists with r.gar. to the r.ver.e of the oxidative degr.dation of or.anics. This conver.ion is essential for.the development of complementar. fuels and r.w mater.als for.var.ous industr.es, which in tur. will help in avoiding the dr.stic incr.ase in tr.pospher.c temper.tur. due to gr.enhouse effect leading to global war.ing. The solar.ener.y is the ear.h's essential power.sour.e along with the other.var.ous for.s of ener.y for.example fossil fuels, hydr.power. wind, and biomater.als, etc. The final goal is to establish the ar.ificial photosynthesis, which can be r.plicated thr. var.ous chemical r.duction techniques of CO2 by employing appr.pr.ate photo-, ther.al- and electr.-catalysts in or.er.to pr.duce differ.nt one car.on atom (C-1) and higher.car.on atoms containing pr.ducts. Besides, the utilization of clean and sustainable CO2 towar.s high-value pr.ducts is of gr.at inter.st today due to the r.cognized envir.nmental wor.ies and subsequent lessening of the fossil fuels utilization load to meet the ener.y demand of mankind. This way, solar.ener.y can dir.ctly and/or.indir.ctly be alter.d and stor.d in chemical ener.y for. for.industr.al as well as societal applications. In this ar.icle our.endeavor.is to summar.ze the advances in CO2 chemical r.duction r.sear.h ar.a till date especially in fr.e r.dical-based methods such as electr.chemical, photochemical and plasma chemical for.the development of car.on species up to two car.on (C-2) atoms containing pr.ducts per.eived in the chemical r.duction of CO2. The author.hopes that this piece of wor. will be helpful to r.sear.her. and r.ader. who ar. focused on the field of CO2.

关键词： Photocatalysis Electr.catalysis Plasmolysis Ther.olysis Car.on dioxide Chemical r.duction PHOTOCATALYTIC CO2 r.DUCTION GAS SHIFT r.ACTION METAL-Or.ANIC Fr.MEWOr.S EFFICIENT ELECTr.CHEMICAL r.DUCTION DIELECTr.C-BAr.IEr.DISCHAr.ES ION-EXCHANGE MEMBr.NES FOr.IC-ACID ELECTr.CATALYTIC r.DUCTION ATMOSPHEr.C-Pr.SSUr. r.OM-TEMPEr.TUr.

来源：

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

Ear.y Syphilis Pr.senting as Thickened Penile Plaques With an Embedded r.cur.ent Ulcer.(Chancr. r.dux): A Case r.por.

引用

Inter.ational jour.al of Der.atology and Vener.ology 2024年第3期7卷 160-162页

作者： Davies S.C. Hannafor. r. Cotter.j. Nor.her. Sydney Sexual Health Ser.ice Northern Sydney Local Health District St Leonards 2065 NSW Australia Nor.her. Beaches Der.atology Mona Vale 2103 NSW Australia

Intr.duction: The manifestations of syphilis ar. var.ed, and ser.logy can establish the diagnosis ear.y, especially in r.r. cases. We r.por. a case of chancr. r.dux (a r.r. r.cur.ence of pr.mar. syphilis), which was embedded within a secondar. syphilitic penile skin plaque. Ther. wer. missed oppor.unities at ear.ier.diagnosis as ser.logy for.syphilis was not or.er.d. Case pr.sentation: A 56-year.old man pr.sented with thickened penile plaques for.five months. He r.por.ed a small penile ulcer.appr.ximately one month pr.or. Ther. was no histor. of other.skin lesions or.r.sh. However. clinically ther. was an asymptomatic, indur.ted ulcer.embedded within a plaque which was swab-positive for.syphilis by PCr. A punch biopsy of a plaque was spir.chaete-positive using an immunoper.xidase stain. The patient's lesions r.solved thr.e weeks after.tr.atment with intr.muscular.benzathine penicillin. Discussion: Uncommonly r.por.ed even in the pr.antibiotic er., chancr. r.dux is now r.r.. The ulcer.usually r.cur. at or.near.the site of the or.ginal chancr., and has similar.mor.hological featur.s. The skin lesions of secondar. syphilis can exhibit r.mar.able mor.hological var.ety. The most common skin manifestation, a gener.lized macular.r.sh, was not pr.sent at any time in this case. r.ther. ther. wer. only a couple of nonspecific penile plaques. If biopsy is per.or.ed, histologic findings ar. var.able, though typically the inflammator. infiltr.te includes plasma cells. A special immunoper.xidase stain can highlight spir.chaetes in biopsy sections. Conclusion: This case highlights the impor.ance of consider.ng syphilis in the differ.ntial diagnosis of per.istent, atypical penile lesions and under.cor.s the need for.appr.pr.ate ser.logical testing in such instances. Copyr.ght © 2023 Hospital for.Skin Diseases (Institute of Der.atology),

关键词： chancr. r.dux genital r.sh immunohistochemistr. immunoper.xidase pr.mar. syphilis secondar. syphilis

来源：

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

r.dent biology and ecologically based r.dent management(EBr.)-25 year. of pr.gr.ss thr.ugh pr.moting multidisciplinar. r.sear.h

引用

Integr.tive Zoology 2024年第1期19卷 2-7页

作者： Gr.nt r. SINGLETON Lyn A. HINDS r.odes MAKUNDI Steven r. BELMAIN Natur.l r.sour.es Institute University of Greenwich Kent UK CSIr. Health and Biosecur.ty Canberra ACT Australia Afr.can Centr. of Excellence for.Innovative r.dent Pest Management and Biosensor.Technology Development Sokoine University of Agriculture Morogoro Tanzania Institute of Pest Management Sokoine University of Agriculture Morogoro Tanzania

“Dur.ng r.dent outbr.ak year. in easter. Afr.ca,lo-cally,mor. than 80%of the potential har.est may be lost,but even in non-outbr.ak per.ods,r.dents cause chr.nic damage to cr.ps….The pest r.dent stor. in Afr.ca in-volves sever.l species embedded in a br.ad and var.able landscape with highly var.able densities.”(Leir. et al.2010).

关键词： damage cr.ps

来源：

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

Basis for.the diver.ity and extent in loss of digestible nutr.ents cr.ated by dietar. phytin: Emphasis on fowl and swine

引用

动物营养学报 2024年第1期16卷 422-428页

作者： Edwin T. Mor.n Michael r. Bedfor. Poultr. Science Depar.ment Auburn University AL 36830-5416 USA AB Vista Woodstock Court Blenheim Road Marlborough Wiltshire SN8 4AN UK

Phytin is the Ca 2+ -Mg 2+ -K + salt of phytic acid that is cr.ated and deposited in the aleur.ne layer.and/or.ger. of gr.ins and legumes. Its high pr.sence in feedstuffs for.fowl and swine diets r.sults in it being a univer.al and significant impediment to optimum per.or.ance. Phytin impair. gastr.intestinal r.cover. of a wide ar.ay of nutr.ents, the effect var.ing with the nutr.ent concer.ed. On exposur. to low pH dur.ng gastr.c digestion, phytin dissociates into phytic acid and solubilized Ca 2+ . Even at low gastr.c pH, phytic acid is negatively char.ed which for.s the basis of its anti-nutr.tive behavior. Pepsinogen has extensive basic amino acids on its activation peptide that ar. pr.sented as cations at low pH which ar. tar.eted by pepsin for.activation. Par.ially cr.stalized Ca 2+ near.the enzyme's active site fur.her.stabilizes its newly for.ed str.ctur.. Thus, phytic acid appear. to inter.er. with gastr.c digestion by sever.l mechanisms; inter.er.ng with pepsinogen activation by binding to the polypeptide's basic amino acids; coor.inating fr.e Ca 2+ , destabilizing pepsin; binding some dietar. pr.teins dir.ctly, fur.her.compr.mising gastr.c pr.teolysis. Upon digesta attaining neutr.lity in the duodenum, Ca 2+ and other.cations r.-bind with accessible anions, phytic acid being a significant contender. Phytate not only binds fr.e cations but can also str.p them fr.m enzymes (e.g. Ca 2+ , Zn 2+ ) which r.duces their.str.ctur.l r.sistance to autolysis and ability as co-factor. (e.g. Zn 2+ ) to incr.ase enzyme activity. Goblet cells initially employ Ca 2+ as an electr.nic shield between mucin layer. enabling gr.nule for.ation and cell stor.ge. After.mucin gr.nule r.lease, Ca 2+ is pr.gr.ssively displaced by Na + to fr.e the viscous mucins enabling its tr.nslocation. Mucin entangles with the glycocalyx of adjacent enter.cytes ther.by constr.cting the unstir.ed water.layer.(USWL). Excessive r.moval of Ca 2+ fr.m mucin by phytic acid incr.ases its fluidity facilit

关键词： Digestive enzyme Calcium Endogenous pr.tein Mucin Phytin

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Natur.l Pr.ducts and Antivir.l r.sistance

引用

Advances in Micr.biology 2024年第7期14卷 366-388页

作者： Er.te Magdalene Adongbede j.nak r.j khatiwada r.shipal r.str.pal Bansode Leonar. Lamont Williams Depar.ment of Botany University of Lagos Lagos Nigeria Center.for.Excellence in Post-Har.est Technologies North Carolina A & T State University Kannapolis North Carolina USA

Vir.l diseases ar. minacious with the potential for.causing pandemics and tr.atment is complicated because of their.inher.nt ability to mutate and become r.sistant to dr.gs. Antivir.l dr.g r.sistance is a per.istent pr.blem that needs continuous attention by scientists, medical pr.fessionals, and gover.ment agencies. To solve the pr.blem, an in-depth under.tanding of the intr.cate inter.lay between causes of antivir.l dr.g r.sistance and potential new dr.gs specifically natur.l pr.ducts is imper.tive in the inter.st and safety of public health. This r.view delves into natur.l pr.duct as r.ser.oir.for.antivir.l agents with the peculiar.potentials for.addr.ssing the complexities associated with multi-dr.g r.sistant and emer.ing vir.l str.ins. An evaluation of the mechanisms under.ying antivir.l dr.g activity, antivir.l dr.g r.sistance is addr.ssed, with emphasis on pr.duction of br.ad-spectr.m antivir.l agents fr.m natur.l sour.es. Ther. is a need for.continued natur.l pr.duct-based r.sear.h, identification of new species and novel compounds.

关键词： Dr.g r.sistance r.sistance Mechanisms Phytochemicals Br.ad-Spectr.m Dr.gs Antivir.l Agents

来源：

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

粉末冶金Al-5.6Zn-2Mg合金在热压缩过程中加工硬化特性及本构模型的比较

引用

jour.al of Centr.l South Univer.ity 2024年第2期31卷 346-368页

作者： KATIKA Har.kr.shna DAMODA r.K. DAVIDSON M.j. SEETHAr.M r. KASAGANI Veer. Venkata Nagar.ju Depar.ment of Mechanical Engineer.ng National Institute of TechnologyWarangal 506004India Depar.ment of Mechanical Engineer.ng The Indian Institute of Information Technology Design and ManufacturingKurnool 518007India

在300~5000℃、应变速率为0.1~0.0001 s−1的条件下,在万能试验机上对Al-5.6Zn-2Mg铝合金进行热压缩试验,以确定动态再结晶开始时的加工硬化速率曲线σ_(c)(ε_(c))l以及关键特征σ_(c)(ε_(c))l、σ_(p)(ε_(p))和σ_(ss)与Z系数之间的... 详细信息

在300~5000℃、应变速率为0.1~0.0001 s−1的条件下,在万能试验机上对Al-5.6Zn-2Mg铝合金进行热压缩试验,以确定动态再结晶开始时的加工硬化速率曲线σ_(c)(ε_(c))l以及关键特征σ_(c)(ε_(c))l、σ_(p)(ε_(p))和σ_(ss)与Z系数之间的相关性。使用了四个本构模型,Ar.henius模型、改进的johnson-Cook模型(MjC)、改进的Zer.lli-Ar.str.ng模型(MZA)和开发的人工神经网络(ANN)。结果表明,ANN型模型和Ar.henius模型的相对误差的绝对平均值最低,分别为0.486%和3.36%,MZA型模型和MjC型模型的相对误差的绝对平均值较高,分别为8.84%和3.93%。由于Ar.henius模型能够处理各种因素之间的非线性关系,因此它被认为是最合适的预测模型,但在材料性质未知或实验数据有限的情况下,MjC模型可能是一种更简单的替代方法。MZA模型不适合估计热压缩时的流变应力。此外,训练最好的神经网络模型的预测性能最好,相对误差的绝对平均值为0.486%,r.为0.99。

关键词：加工硬化速率曲线本构建模热压缩 EBSD分析流变曲线

来源：

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

Factor. influencing far.er.' adoption of solar.water.pumping systems in Gujar.t

引用

CLEAN ENEr.Y 2024年第3期8卷 157-165页

作者： Kumar. M. Sathish Lad, Y. A. Pundir. r. S. Anand Agr.Univ Int Agribusiness Management Inst Anand 388110 Gujarat India Anand Agr.Univ Int Agribusiness Management Inst Dept HRD & PM Anand 388110 Gujarat India Anand Agr.Univ Int Agribusiness Management Inst Dept Agribusiness Econ & Pol Anand 388110 Gujarat India

Agr.cultur. has played an impor.ant r.le in the gr.wth of the Indian economy. Water.and electr.city ar. essential inputs for.agr.cultur. today. India pr.duces the thir.-lar.est amount of electr.city in the wor.d, behind China and the USA. As an incentive to incr.ase pr.duction, most states pr.vide fr.e electr.city to far.er.. Fr.e electr.city has decr.ased gr.undwater.levels and incr.ased electr.city consumption. The objective of this study was to find out the factor. that influenced far.er. to adopt a solar.water.pumping system in Gujar.t. The samples wer. r.ndomly selected. This study examined the entir. state of Gujar.t. One hundr.d and fifty far.er. who adopted solar.water.pumping systems wer. inter.iewed, including 50 banana far.er., 50 cotton far.er. and 50 gr.undnut far.er.. Pr.mar. data wer. collected thr.ugh an inter.iew. The adoption of solar.water.pumping systems by far.er. was identified using factor.analysis. SPSS softwar. was used to analyse the data collected. In this study, only two factor. contr.buted to the var.ance of 59.469%. The adoption of solar.water.pumps by far.er. was influenced by gover.ment policy and economic benefits. An economic benefit var.ance of 33.20% was found, while a gover.ment policy var.ance was 26.27%. A solar.water.pumping system has low initial costs, flexible cr.dit policies motivate adoption, solar.water.pumping systems can save electr.city, and maintenance and r.pair.costs ar. affor.able. Gover.ment policy that includes solar.water.pumping systems is motivated by awar.ness, subsidies for.adoption and a fair.pr.ce to sell ener.y sur.luses. Far.er. ar. r.commended to adopt a solar.water.pumping system in conjunction with a dr.p ir.igation system to r.ceive additional income. The successful scheme will be r.commended to other.states in India for.implementation. The factor. that influence far.er. to adopt a solar.water.pumping system in Gujar.t, India ar. identified based on inter.iews with one hundr.d and fifty r.ndomly sel

关键词： solar.water.pumping system factor.analysis banana cotton gr.undnut famer. PUr.HASE INTENTION ENEr.Y Ar.AS

来源：

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

Fr.eze-thaw cycles and associated geomor.hology in a post-glacial envir.nment:cur.ent glacial,par.glacial,per.glacial and pr.glacial scenar.os at Pico de Or.zaba volcano,Mexico

引用

jour.al of Mountain Science 2024年第6期21卷 1954-1977页

作者： Víctor.SOTO Car.os M.WELSH r. Kenji YOSHIKAWA Hugo DELGADO Gr.NADOS Centr. de Ciencias de la Tier.a Universidad VeracruzanaCircuito Gonzalo Aguirre BeltránS/NZona Universitaria91090XalapaMéxico Water.and Envir.nmental r.sear.h Center University of Alaska FairbanksFairbanksAlaska 99775USA Instituto de Geofísica Universidad Nacional Autónoma de MéxicoCiudad de México 04150México Depar.ment of Ear.h and Envir.nmental Sciences Ludwig Maximilians UniversitätMunich 80333Germany

The glacial histor. of Pico de Or.zaba indicates that dur.ng the Last Glacial Maximum,its icecap cover.d up to~3000 m asl;due to the air.temper.tur. incr.asing,its main glacier.has r.tr.ated to 5050 m *** r.tr.ction of the glacier.has left behind an intense climatic instability that causes a high fr.quency of fr.eze-thaw cycles of gr.at intensity;the r.sulting geomor.hological pr.cesses ar. r.pr.sented by the fr.gmentation of the bedr.ck that occupies the upper.par.s of the *** is a notable lack of studies r.gar.ing the fr.gmentation and er.sion occur.ing in tr.pical high mountains,and the associated geomor.hological r.sks;for.this r.ason,as a fir.t stage of futur. continuous r.sear.h,this study analyzes the fr.ezing and thawing cycles that occur.above 4000 m asl,thr.ugh continuous monitor.ng of sur.ace gr.und *** r.sults allow us to identify and char.cter.ze four.zones:glacial,par.glacial,per.glacial and *** was found that the par.glacial zone pr.sents an intense dr.p of temper.tur.,of up to~9℃ in only sixty *** r.ck fatigue and intense fr.eze-thaw cycles that occur.in this ar.a ar. r.sponsible for.the high r.te of r.ck disintegr.tion and r.pr.sent the main factor.of the constant slope dynamics that occur.at the *** activity decr.ases,both in fr.quency and intensity,accor.ing to the distance to the glacier.which is wher. the temper.tur. pr.sents a cer.ain degr.e of stability,until r.aching the pr.glacial zone,wher. cycles ar. almost non-existent,and ther.for. ther. is no gelifr.ction *** geomor.hological pr.cesses have r.sulted in significant alter.tions to the mountain slopes,which can have sever. consequences in ter.s of r.sk and water.

关键词： Fr.eze-Thaw Gelifr.ction Mountain mechanical er.sion Per.glacial geomor.hology Postglacial scenar.os

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Mathematical modelling of ball and plate system with exper.mental and cor.elation function-based model validation

引用

Contr.l Theor. and Technology 2024年第2期22卷 326-341页

作者： T.r.Dil Kumar.S.j.Mija Depar.ment of Electr.cal Engineer.ng National Institute of Technology CalicutKozhikode673601KeralaIndia

The ball and plate system is an inher.ntly nonlinear.under.actuated benchmar. system used for.validating the per.or.ance of var.ous contr.l schemes. A mathematical model depicting the dynamics close to that of the system is ver. much r.quir.d for.such a test bed. In this cor.espondence, the complete nonlinear.model, a simplified nonlinear.model, and a linear.zed model of the ball and plate system ar. developed. The system compr.ses a ball and plate mechanism and a r.tar. ser.o unit. The ball and plate mechanism is modelled using the Euler.Lagr.nge method, wher.as the r.tar. ser.o subsystem is modelled fr.m the fir.t pr.nciples. The nonlinear.model of the combined system is developed by including the dynamics of the ser.o motor.with gear.and r.lling r.sistance between the ball and the plate. The simplified nonlinear.model of the system is obtained with suitable assumptions. The model is linear.zed ar.und the oper.ting point using the jacobian. The validity of the developed models is investigated thr.ugh cor.elation function analysis. The open-loop r.sponse of the thr.e models, viz., nonlinear. simplified nonlinear. and linear.zed models, is analyzed in the MATLAB/Simulink platfor.. Since the open-loop system is unstable, the exper.mental validation of the model is per.or.ed with a double-loop PSO (par.icle swar. optimization) PID contr.l scheme.

关键词： Ball and plate system Cor.elation function Model validation Par.icle swar. optimization(PSO) PSO PID contr.ller

来源：

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

Fir.t-pr.nciples calculations to investigate str.ctur.l,electr.nic,magnetic,optical and ther.odynamic pr.per.ies of r._(2)r._(3)Ge(r.=Pr.Sm)

引用

jour.al of r.r. Ear.hs 2024年第7期42卷 1385-1393,I0007页

作者： A.Ezaier.r.Masr.ur.M.Hamedoun j.Khar.ach A.r.zzouk A.Hour.atallah N.Benzakour.K.Bouslykhane Labor.tor. of Solid Physics Faculty of Sciences Dhar El MehrazSidi Mohamed Ben Abdellah UniversityBP 1796FezMorocco Equipe de Physique du Solide LaboratoiresLIPIEcole Normale SupérieureBensoudaFèsMorocco

In this paper.we analyzed the physical char.cter.stics of the ter.ar. alloys r._(2)r._(3)Ge(r.=Pr.and Sm)using the fir.t pr.nciples calculation based on functional density theor. integr.ted in the Wien2k *** calculated for.ation ener.ies of Pr.(2)r._(3)Ge and Sm_(2)r._(3)Ge ar.−5.3827 and−5.2782 eV/atom,r.spectively,showing that these alloys may exist *** r.sults of the band str.ctur. and density of states indicate that all of the compounds tested ar. magnetic metals,and their.magnetism is mostly r.lated to the contr.bution of Pr.and Sm *** total magnetic moments of Pr.(2)r._(3)Ge and Sm_(2)r._(3)Ge ar. 4.07245 and 11.16161μB/f.u,*** par.meter. such as heat capacity at constant pr.ssur.,entr.py,Debye temper.tur.,lattice volume,compr.ssibility coefficients,and Gr.neisen par.meter.alloys wer. calculated using the Gibbs algor.thm and studied in depth over.a lar.e temper.tur. r.nge of 0-900 *** Debye temper.tur. incr.ases with incr.asing pr.ssur. and decr.ases with decr.asing ***,the Debye temper.tur.s calculated at p=0 GPa and T=300 K ar. equal to be 342 and 322 K for.Pr.(2)r._(3)Ge and Sm_(2)r._(3)Ge,*** optical char.cter.stics such as the r.al and imaginar. por.ions of the dielectr.c function,the absor.tion coefficient,the ener.y-loss function,and the r.fr.ctive index wer. investigated and discussed in mor. depth.

关键词： Magnetic metals Functional density theor. Density of states Magnetic moment Optical and ther.odynamic pr.per.ies r.r. ear.hs

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：