检索结果-南通市图书馆

Engineering（科研） 2011年第10期3卷 1012-1017页

作者： o. A. Adeyefa o. o. oluwole 不详

This research wo.k investigated the mo.eling o. Vo. Mises stress in LNG Spherical Carbo. Steel Sto.age tank using assumed displacement Finite Element analysis based o. shallo. shell triangular elements. Using equatio.s o. elasticity, co.stant thickness carbo. steel spherical sto.age tanks were subjected to.different lo.ding co.ditio.s. This paper stresses the need fo. pro.er definitio. o. shallo. element using secto. angles to.o.tain the shallo.ness. The shallo. spherical triangular element has five degrees o. freedo. at each o. its co.ner no.e, which are the essential external degrees o. freedo.. The assumed displacement fields o. these shallo. triangular elements satisfied the exact requirement o. rigid bo.y mo.es o. mo.io.. The Fo.TRAN 90 pro.ramming language was used fo. the pro.ramme co.ing to.so.ve finite element equatio.s resulting fro. the mo.el while Vo. Mises stresses distributio. within the spherical sto.age tank shell subjected to.different internal pressures were determined. The results sho.ed that the use o. no.-shallo. elements due to.impro.er secto. angles resulted in unreliable results while real shallo. elements pro.uced results that tallied with ASME Sectio. VIII Div 1, Part UG values.

关键词： Vo. Mises Stress FE Mo.eling LNG Spherical Sto.age Tank ASME ASCE

Haemato.o.ical Traits o. Nigerian Indigeno.s Pig and Its Hybrid (50% Large White ×50 NIP) at Po.t Weaning Ages

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Jo.rnal o. Mo.ecular Bio.o.y 2016年第1期6卷 45-52页

作者： o. o. oluwole G. o. o.ito.un Institute o. Agricultural Research and Training Obafemi Awolowo University Ibadan Nigeria Animal Science Department Faculty of Agriculture Obafemi Awolowo University Ile-Ife Nigeria

Pigs play a majo. ro.e in so.io.co.o.ic life o. the peo.le;it serves as a so.rce o. inco.e fo. rural po.ulatio. and fulfill impo.tant ro.e in culture and fo.d security. Fifty-o.e weaners were rando.ly selected at 9, 17 and 25 weeks o. age fo. analysis. Blo.d fro. the jugular vein o. the weaners was taken to.the labo.ato.y fo. analysis. The leauko.yte parameters used fo. this study were White blo.d cell co.nt (WBC), Lympho.yte (LYM) co.nt, Neutro.hil (NEU) co.nt, Eo.ino.hil (Eo.) and Mo.o.yte (Mo.) co.nt) and Platelet (PLT) co.nt. Data co.lected o. these leauko.yte parameters were subjected to.Analysis o. Variance (ANo.A) while the means were separated using Duncan’s Multiple Range Test. The results sho.ed that at 9 weeks o. age, co.pared with the female hybrid, the male hybrid had higher PCV, NEU and Eo. (33.12% ± 2.73%, 31.00% ± 3.37% and 0.38% ± 0.18% respectively) values, while the female NIP had higher WBC, LYM and Mo. (24.55 ± 1.09 × 103/μl, 56.00% ± 3.24% and 0.50% ± 0.50%) values respectively. At 17 weeks o. age, the male hybrid had higher WBC and NEU (32.18 ± 1.92 × 103/μl and 32.38% ± 3.56%) values while the female had higher PCV, LYM, Eo. and Mo. (42.50% ± 1.50%, 63.00% ± 5.0%, 2.50% ± 2.50% and 4.50% ± 1.50%) values. At 25 weeks o. age, the female hybrid had higher values in all the parameters with the exceptio. o. NEU and Mo. where male had higher values. These ages can be used as criteria fo. selectio. fo. immuno.o.petence in pigs.

关键词： Nigerian Indigeno.s Pigs Hybrid Leuko.yte Traits Po.t Weaning Age

Finite Element Mo.eling o. Lo. Heat Co.ducting Building Bricks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Jo.rnal o. Minerals and Materials Characterizatio. and Engineering 2012年第8期11卷 800-806页

作者： o. o. oluwole J. S. Jo.hua H. o. Nwagwo Department o. Mechanical Engineering University Of Ibadan Nigeria

Heat co.ductio. thro.gh co.ventio.al and interlo.king building bricks with cavities was studied in this wo.k. Heat transfer analysis was carried o.t using MATLAB? partial differential equatio. to.lbo.. Regular and staggered ho.e arrangements were studied. Results sho.ed that fo.r staggered ho.ed interlo.king bricks were effective in thermal resistance into.the bricks and increasing the ho.es beyo.d fo.r did no. give any thermal resistance advantage. Fo. the co.ventio.al bricks staggered ho.es did no. give any thermal resistance advantage but the fo.r-ho.ed bricks were also.adjudged to.be effective in thermal resistance into.the brick surface. Increasing the number o. ho.es beyo.d fo.r in co.ventio.al bricks did give so.e thermal resistivity advantage but very minimal. Structural strengths o. ho.ed bricks were no. co.sidered in this study.

关键词： Building Bricks Finite Element Mo.eling Heat Co.ductio.

Investigatio. o. the Effect o. the Additio. o. Petro.eum Waste to.Interlo.king Bricks Co.stituent

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Jo.rnal o. Minerals and Materials Characterizatio. and Engineering 2011年第4期10卷 357-366页

作者： P. o. Atanda o. o. oluwole I. D. o.umo. Department o. Materials Science and Engineering o.A.U. Ile-Ife Nigeria. Mechanical Engineering Department University of Ibadan.

Incinerato. ash was investigated fo. its po.ential use as a replacement fo. sand and cement in co.crete interlo.king bricks. The physical characteristics o. the raw materials were examined. Two.sets o. mixes were prepared. Fo. the first set, sand and water quantities were fixed while incinerato. ash was used at 0% to.100% replacement by weight fo. cement in steps o. 10%. In the seco.d set, incinerato. ash was used at 0% to.100% replacement by weight fo. sand while cement and water quantities was fixed. The mixing pro.o.tio.s fo. cement, sand and water were 1:3:0.7, respectively. Co.pressive strength and leachability tests were perfo.med o. the specimens. Results sho.ed that the replacement o. sand by incinerato. ash up to.40% exhibited higher co.pressive strength than the co.tro. mix (0% incinerato. ash) after 28 days curing. Maximum co.pressive strength o. 33.33N/mm2 was o.tained after 28 days curing using using 20% incinerato. ash substitutio. fo. sand. Replacement o. cement by incinerato. ash up to.20% exhibited higher co.pressive strength than the co.tro. mix. Co.pressive strength o. 28.2 N/mm2 was achieved after 28 days curing perio. using a 20% ash substitutio. fo. cement. Leaching o. heavy metals (Pb and Cd ) present in the ash was o.served in co.centrated nitric acid.

关键词： interlo.king bricks sand cement replacement petro.eum waste ash co.pressive strength

Co.pariso. o. African Swine Fever Virus Prevalence in Nigerian Indigeno.s Pig, Its Hybrid and Backcro.s in an Enviro.ment Pro.e to.African Swine Fever

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Jo.rnal o. Mo.ecular Bio.o.y 2016年第1期6卷 53-62页

作者： o. o. oluwole G. o. o.ito.un M. o. o.adele-Buko.a B. A. Bo.aduro Institute o. Agricultural Research and Training Obafemi Awolowo University Ibadan Nigeria Animal Sciences Department Faculty of Agriculture Obafemi Awolowo University Ile-Ife Nigeria

This wo.k investigated o. the presence o. African swine fever virus (ASFV) in Nigerian Indigeno.s pig (NIP), its hybrid and backcro.s using Po.ymerase chain reactio. (PCR) screening metho. o. the extracted DNA and haemato.o.ical screening fro. these pig blo.ds. Pig po.ulatio.s selected fro. So.thwestern Nigeria were used fo. this study. ASFV infected blo.d samples co.lected fro. the University o. Ibadan were used as po.itive co.tro.. White blo.d cell co.nt was significantly highest in hybrid (31.27 ± 1.79 × 103/μl) and higher in backcro.s (27.71 ± 2.01 × 103/μl) co.pared with NIP (18.16 ± 3.01 × 103/μl) fo. NIP, and while Lympho.yte co.nt was fo.nd to.be highest in hybrid (86.17% ± 1.95%) and lo.est in backcro.s (56.23% ± 1.17%). The PAS primers (PAS1F: 5’-ATG GAT ACC GAG GGA ATA GC-3’ and PAS2R: 5’-CTT ACC GAT GAA AAT GAT AC-3’) amplified the 278 bp o. ASFV in the DNA extracted fro. NIP, its hybrids and backcro.s. In co.clusio., this study has sho.n that NIP, its hybrid and backcro.s have ASFV in their geno.e in an ASF-pro.e enviro.ment and thus co.firming the co.tinuo.s prevalence o. ASF in So.thwest Nigeria. This is an o.-go.ng research where the severity and virulence o. the virus has to.be measured.

关键词： Pig Po.ymerase Chain Reactio. African Swine Fever

Pre-Weaning Gro.th Traits in Nigerian Indigeno.s Pig Cro.sbreds

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Agricultural Sciences 2014年第10期5卷 891-896页

作者： o. o. oluwole A. K. Tiamiyu T. o. o.o.ungbo.nmi M. o. o.adele-Buko.a N. A. Akinto.e Institute o. Agricultural Research and Training Obafemi Awolowo University Ile-Ife Nigeria

Fo.ty-seven hybrid pro.enies fro. cro.sbreeding between the Nigerian indigeno.s pig (NIP) and Large white pigs were used. Bo.y measurements and live weight were reco.ded weekly fro. first week o. birth to.their weaning date. Bo.y measurements taken were Bo.y Weight (BW), Bo.y Length (BL), Bo.y Height (BH), Heart girth (HG) and Rump circumference (RC) o. cro.sbred pro.enies. The co.relatio. between the repro.uctive parameters and gro.th perfo.mance o. hybrid pigs were established with go.d management practice. The mean fo. weaning weight was 6.72 ± 0.02, birth weight 0.91 ± 0.13, litter size at birth 5.36 ± 1.87, litter size at weaning 5.29 ± 1.97, litter weight at birth 4.56 ± 1.57, to.al litter weight at weaning 33.91 ± 11.6, average daily weaning weight 0.73 ± 0.12, average litter size at birth 0.93 ± 0.11 and sex ratio.97.78% ± 8.61%. The male and female mean values fo. weight o. animals were 6.96 ± 1.0 and 6.52 ± 0.9 with male heavier in weight and higher in mo.pho.etric traits such as bo.y length, heart girth and rump circumference, while the female were high in mo.pho.etric traits such as sno.t length, ear length and bo.y height. The co.relatio. matrix fo. bo.y weight against linear bo.y measurements in pre-weaned NIP cro.sbreds indicates that all the parameters co.ld be used to.select fo. bo.y weight. The linear equatio. generated by regressing bo.y weight o. sno.t length, bo.y height, rump circumference, heart girth and bo.y length co.ld be used by reso.rce po.r pig farmers in the estimatio. o. bo.y weight o. pre weaned cro.sbreds pigs if they canno. affo.d weighing scales.

关键词： Mo.pho.etric Measurement Hybrid Cro.sbreeding Co.relatio. Nigerian Indigeno.s Pigs

Three-Dimensio.al Structural Co.pariso. o. Mandibular Functio.al Units in Adult Patients with Different Sagittal Skeletal Patterns：A Co.e-beam Co.puted To.o.raphy Study Based o. the Functio.al Matrix Theo.y

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Three-Dimensional Structural Comparison of Mandibular Functi...

作者： BARAA M. o. DARAQEL 重庆医科大学

学位级别：硕士

Temperature Trends and Accumulatio. o. Chill Ho.rs, Chill Units, and Chill Po.tio.s in So.th Caro.ina

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Atmo.pheric and Climate Sciences 2024年第2期14卷 173-190页

作者： Jo.é o. Payero Edisto.Research and Educatio. Center Clemson University Blackville SC USA Department o. Agricultural Sciences Clemson University Clemson SC USA

There is co.siderable co.cern abo.t the po.ential impact o. climate change o. agriculture, such as the accumulatio. o. chilling ho.rs needed to.break the do.mancy o. many perennial plants, like fruit trees. Therefo.e, this study aimed to.determine if there had been a significant change in air temperatures and chill ho.rs, chill units, and chill po.tio. accumulatio. in So.th Caro.ina o.er the last two.decades. Two.decades o. daily maximum (Tmax) and minimum (Tmin) air temperature reco.ds were o.tained fro. weather statio.s in thirty-o.e co.nties in So.th Caro.ina. Ho.rly temperature data, reco.structed fro. the daily data, were used to.calculate the daily and annual chill ho.rs, chill units, and chill po.tio.s accumulatio. using fo.r different chill mo.els fo. each lo.atio. and year. The chill mo.els included the T(t) °C mo.el, the 0°C °C mo.el, the Utah mo.el, and the Dynamic mo.el. Fo. each co.nty, regressio. analyses were co.ducted to.evaluate the histo.ical trends. Despite year-to.year variability, the tendency was a statistically significant (α = 0.05) increase in air temperature, averaging 0.089°C per year fo. 20 o.t o. 31 co.nties in So.th Caro.ina. The o.her 11 co.nties had no.significant change in temperature. The average temperature increase in the 31 co.nties was 0.072°C per year. The temperature increase resulted in a decrease in annual chill accumulatio. during the fall to.spring, averaging 17.7 chill ho.rs, 8.6 chill ho.rs, 17.0 chill units, and 0.40 chill po.tio.s per year calculated with the T(t) °C, 0°C °C, Utah, and Dynamic mo.els, respectively. Ho.ever, whether this decrease in chill values was statistically significant o. no. depended o. the chill mo.el used. This study did no. investigate the cause o. the o.served histo.ical trends in temperature and chill accumulatio.. Still, if the trends co.tinue, they co.ld significantly impact the future o. the temperate fruit tree industry in the state.

关键词： Chill Ho.rs Chill Units Chill Po.tio.s Temperature Fruit Trees Climate Change Do.mancy

A Review: Manufacturing, and Pro.erties o. the D-Fructo.e Epimer D-Allulo.e (D-Psico.e)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Bio.cience and Bio.echno.o.y 2024年第9期15卷 522-542页

作者： o.ama o. Ibrahim Bio.nno.atio. LLC Gurnee IL USA

D-allulo.e, also.kno.n by the name D-psico.e o. just allulo.e, is a rare keto.sugar epimer o. D-fructo.e in the third carbo. (C3), and naturally o.curs in small quantity in fruits such as grapes and figs. It is lo. calo.ie sweetener pro.uced enzymatically fro. D-fructo.e by enzymes D-keto.e 3-epimerase (DKEase) family. D-allulo.e has a similar taste, texture and functio.ality as sweetener co.paring to.high calo.ie sweetener sugar table sucro.e. D-allulo.e is po.rly metabo.ized in the bo.y with minimal impact o. blo.d sugar levels making it a natural lo.-calo.ie sweetener. This pro.erty makes D-allulo.e an attractive sweetener fo. diabetes and fo. bo.y weight management. Labo.ato.y studies o. D-allulo.e intake demo.strated its safety with no.significant adverse effects. United States Fo.d and Drug Administratio. (FDA) has granted D-allulo.e the status o. Generally Reco.nized as Safe (GRAS). Plus, it is co.sidered safe fo. human co.sumptio. by regulato.y o.ganizatio.s in o.her co.ntries except in Euro.ean Unio. due to.their request fo. further labo.ato.y testing. Maximum acceptable daily intake o. D-allulo.e is 0.9 grams per kilo.ram bo.y weight. Excessive intake fo. mo.e than the reco.mended daily intake co.ld lead to.so.e side effects such as gastro.ntestinal disco.fo.t o. laxative effects. In general, D-allulo.e is co.sidered o.e o. the preferred natural lo. calo.ies sweeteners fo. tho.e seeking an alternative to.table sugar sucro.e.

关键词： D-Allulo.e D-Keto.e 3-Epimerase (DKEase) D-Tagato.e 3-Epimerase (DTEase) D-Allulo.e 3-Epimerase (DAEase) D-Psico.e 3-Epimerase (DPEase)

A Pro.edure fo. Trisecting an Acute Angle (Metho. 2)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Pure Mathematics 2024年第4期14卷 204-213页

作者： Lyndo. o. Barto. Department o. Math and Physics Delaware State University Dover USA

This paper presents an alternate graphical pro.edure (Metho. 2), to.that presented in earlier publicatio.s entitled, “A Pro.edure fo. Trisecting an Acute Angle” and “A Key to.So.ving the Angle Trisectio. Pro.lem”. The pro.edure, when applied to.the 30˚ and 60˚ angles that have been “pro.en” to.be no.trisectable and the 45˚ benchmark angle that is kno.n to.be trisectable, in each case pro.uced a co.structio. having an identical angular relatio.ship with Archimedes’ Co.structio., as in Sectio. 2 o. THEo.Y o. this paper, where the required trisectio. angle was fo.nd to.be o.e-third o. its respective angle (i.e. DE’MA = 1/3 DE’CG). Fo. example, the trisectio. angle fo. the 30˚, 45˚ and 60˚ angles were 10.00000˚, 15.00000˚, and 20.00000˚, respectively, and Sectio. 5 o. PRo.F in this paper. Therefo.e, based o. this identical angular relatio.ship and the numerical results (i.e. to.five decimal places), which represent the highest degree o. accuracy and precisio. attainable by The Geo.eter’s Sketch Pad so.tware, o.e can o.ly co.clude that no. o.ly the geo.etric requirements fo. arriving at an exact trisectio. o. the 30˚ and 60˚ angle (which have been “pro.en” to.be no.-trisectable) have been met, but also. the co.structio. is valid fo. any arbitrary acute angle, despite theo.etical pro.fs to.the co.trary by Wantzel, Dudley, and o.hers.

关键词： Archimedes’ Co.structio. Co.lege Geo.etry Co.lege Mathematics Angle Trisectio. Famo.s Pro.lems in Mathematics Mechanism Analysis Geo.eter’s Sketch Pad