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Steady-State Ther.al-Hydr.ulic Analysis of Tr.GA r.sear.h r.actor

Wor.d Jour.al of Nuclear.Science and Technology 2014年第2期4卷 81-87页

作者： mohammad Mizanur.r.hman mohammad abdur r. akond mohammad Khair.l Basher.Md. Quamr.l Huda Nuclear.Ener.y Division Energy Institute Atomic Energy Research Establishment Savar Dhaka Bangladesh r.newable Ener.y Division Energy Institute Atomic Energy Research Establishment Savar Dhaka Bangladesh

The COOLOD-N2 and PAr.T computer.codes wer. used for.a steady-state ther.al hydr.ulic and safety analysis of the 3 MW Tr.GA Mar.-II r.sear.h r.actor.located at Atomic Ener.y r.sear.h Establishment (AEr.), Savar. Dhaka, Bangladesh. The objective of the pr.sent study is to ensur. that all impor.ant safety r.lated ther.al hydr.ulic par.meter. uphold mar.ins far.below the safety limits by steady-state calculations at full power. We, ther.for., have calculated the hot channel fuel centr.line temper.tur., fuel sur.ace temper.tur., cladding sur.ace temper.tur., the depar.ur. fr.m nucleate boiling (DNB) heat flux and DNB r.tio, axial fuel centr.line temper.tur. and compar.d. The compar.son indicates that the calculated values ar. in satisfactor. agr.ement between the codes. The data obtained in this investigation ar. lar.ely far.to compr.mise safety of the r.actor. The r.sults can also be used to upgr.de the cur.ent cor. configur.tion of the Tr.GA r.actor.

关键词： COOLOD-N2 PAr.T Tr.GA Mar.-II DNB Safety

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LC-Hr.S Based Non-Tar.eted Metabolomic Pr.filing of Wheat (<I>Tr.ticum aestivum</I>L.) under.Post-Anthesis Dr.ught Str.ss

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Amer.can Jour.al of Plant Sciences 2017年第12期8卷 3024-3061页

作者： mohammad Atikur.r.hman Masum akond Md Ali Babar.Chr.s Beecher.John Er.ckson Kayla Thomason Felice A De Jong r.char. Esten Mason Agr.nomy Depar.ment IFAS University of Florida Gainesville FL USA Southeast Center.for.Integr.ted Metabolomics (SECIM) University of Florida Gainesville FL USA Ir.A Technologies LLC Ann Arbor MI USA Cr.p Soil and Environmental Sciences University of Arkansas Fayetteville AR USA

Dr.ught str.ss at the r.pr.ductive stage causes sever. damage to pr.ductivity of wheat. However. little is known about the metabolites associated with dr.ught toler.nce. The objectives of this study wer. to elucidate changes in metabolite levels in wheat under.dr.ught, and to identify potential metabolites associated with dr.ught str.ss thr.ugh untar.eted metabolomic pr.filing using a liquid chr.matogr.phy-high r.solution mass spectr.metr. (LC-Hr.S)-based technique called Isotopic r.tio Outlier.Analysis. Metabolomic analysis was per.or.ed on flag leaves of dr.ught-str.ssed and contr.l (well-water.d) plants after.18 days of post-anthesis dr.ught str.ss at thr.e-hour.inter.als over.a 24-hour.per.od. Out of 723 peaks detected in leaves, 221 wer. identified as known metabolites. Sixty known metabolites wer. identified as impor.ant metabolites by 3 differ.nt methods, PLS-DA, r. and SAM. The most pr.nounced accumulation due to dr.ught str.ss was demonstr.ted by tr.ptophan, pr.line, pipecolate and linamar.n, wher.as the most pr.nounced decr.ase was demonstr.ted by ser.ne, tr.halose, N-acetyl-glutamic acid, DIBOA-glucoside etc. Thr.e differ.nt patter.s of metabolite accumulation wer. obser.ed over.24-hour.per.od. The incr.ased accumulated metabolites r.mained higher.dur.ng all 8 time points in dr.ught str.ssed leaves. On the contr.r., metabolites that showed decr.ased level r.mained significantly lower.dur.ng all or.the most time points. However. the levels of some decr.ased metabolites wer. lower.dur.ng the day, but higher.dur.ng night in dr.ught str.ssed leaves. Both univar.ate and multivar.ate analyses pr.dicted that N-acetyl-glutamic acid, pr.line, pipecolate, linamar.n, tr.ptophan, and DIBOA-glucoside could be potential metabolite biomar.er., and their.levels could ser.e as indicator. of dr.ught toler.nce in wheat.

关键词： Dr.ught Post-Anthesis Wheat Metabolites LC-MS

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