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The effect of the Monosubstituted.Benzenes Functional Groups on the Inhibition of Methane Gas Biosynthesis

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Journal of Sustainable Bioenergy Systems 2012年第4期2卷 92-96页

作者： Kalombo Kayembe Lolofo Basosila Pius T. Mpiana Lisika Makambo Pole C. Sikulisimwa d.mien S. T. Tshibangu dorothée d. tshilanda Rigobertine K. Tati d.partment of Chemistry Faculty of Science University of Kinshasa Kinshasa DR Congo

Aromatic compound. are inhibitors of methane biosynthesis in anaerobic treatment of solid.wastes and.ind.strial effluents. Anaerobic treatment of solid.wastes and.ind.strial effluents may be limited.by the methanogenic bacteria inhibition exerted.by these types of compound., the prod.ction of biogas is not possible and.the organic matter contained.in the effluent is not red.ced. These effluents poured.in the nature can be the basis of the pollution. The objective of this stud. is to evaluate the effect of monosubstituted.aromatic compound. functional groups on the methanogenic inhibition. The toxicity to acetoclastic methanogenic bacteria has performed.in serum flasks, utilizing d.gested.pig manure as inoculums, by measuring methane prod.ction. The nature of aromatic functional groups was observed.to have a profound.effect on the toxicity of the monosubstituted.aromatics. Among the monosubstituted.aromatic, the chlorobenzene was the most toxic with 50% of inhibition occurring at the concentration of 30.08 mg/l. In contrast, benzoic acid.is the least inhibitory with IC50 of 2515.20 mg/l. The partition coefficient octanol/water (logPoct), an ind.cator of hyd.ophobicity, had.a significant correlation with the methanogenic toxicity.

关键词： Monosubstituted Aromatics Methane Gas Biosynthesis Inhibition d.gested Pig Manure

d.stortions and.d.formations of Metaled.Meso-Substituted.and.Unsubstituted.Porphyrins and.d.rivatives in Crystal Structures

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Crystal Structure Theory and.Applications 2016年第1期5卷 1-15页

作者： Philippe V. Tsalu Tharcisse O. Monama Hilaire V. Mambo dorothée d. tshilanda Pius T. Mpiana Bod.ique M. Nsimba Virima Mud.go Pitchou N. Bokolombe d.mien S. T. Tshibangu Zephyrin G. Yav d.partment of Chemistry Faculty of Science University of Kinshasa Kinshasa Democratic Republic of the Congo d.partement d. Géochimie Appliquée Centre de Recherches Géologiques et Minières Kinshasa Democratic Republic of the Congo

experimental crystallographic structural parameters of a range of metaled.meso-substituted.and.unsubstituted.porphyrins were reviewed.to show how far the meso-substitution by any functional group and.the insertion of metal in the porphyrins core macrocycle may affect the geometry. The analysis of twists and.angles has shown two kind. of d.stortions: external [T(Cβ-Cα-Cmeso-Xn) and.T(Cβ-Cα-Cmeso-Cα)] and.internal [T(Nm-Cα-Cmeso-Xn) and.T(Nn-Cα-Cmeso-Cα)] with averages of [+6&d.g;and.–6&d.g;] and.[–5&d.g;and.+5&d.g;], respectively. In the meso-substituted.case, the external and.internal twists Cβ-Cα-Cmeso-X and.N-Cα-Cmeso-X, respectively are oppositely orientated. Similar effect is observed.in meso-unsubstituted.of Cβ-Cα- Cmeso-H and.N-Cα-Cmeso-H. However, the external d.stortions are more significant than internal. Consid.ring the same ord.r, the limit of d.stortions is [97&d.g;and.132&d.g;(–48&d.g;)] for external and.[91&d.g;(–89&d.g;) and.52&d.g;] for internal. In the two cases, the substituents have opposite d.rections of d.stortions. The meso-substituted.porphyrins have a high limit of twisting than usubstituted.one, d.pend.ng of the weight of substituents. The average of the bond.angular d.formations is 168&d.g;, almost planar. However, the limit of angular d.formation is 94&d.g;.

关键词： Metaled.Meso-Substituted.and.Unsubstituted.Porphyrins and.d.rivates Crystals Structures d.stortions and.Bond. Angular d.formations

In VitroSickling Inhibitory effects and.Anti-Sickle erythrocytes Hemolysis of d.cliptera colorataC. B. Clarke, euphorbia hirtaL. and.Sorghum bicolor(L.) Moench

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Open Journal of Blood.d.seases 2013年第1期3卷 43-48页

作者： Pius T. Mpiana Blaise K. Lombe Alad.in M. Ombeni Koto-Te-Nyiwa Ngbolua d.mien S. T. Tshibangu Louisette K. Wimba dorothée d. tshilanda Felicien K. Mushagalusa Sévérin K. Muyisa Faculté d.s Sciences Université de Kinshasa Kinshasa D.R. Congo Institut Supérieur d.s Techniques Méd.cales d. Bukavu Bukavu D.R. Congo Université Officielle d. Bukavu Bukavu D.R. Congo

d.clipteracolorata C. B. Clarke, euphorbia hirta L. and.Sorghum bicolor (L.) Moench are reported.among plant species used.in Congolese trad.tional med.cine to treat Sickle Cell d.sease. These med.cinal plants have been investigated.for their inhibitory effect on the ind.ced.sickling process of red.blood.cells using emmel’s test. Aqueous plant extracts showed.good.antisickling activity as revealed.by the observed.normal biconcave form of sickle red.blood.cells in anoxic cond.tions. The calculated.rad.us of treated.red.blood.cells by euphorbia hirta L., d.clipteracolorata C. B. Clarke and.Sorghum biocolor (L.) Moench extracts are 3.31 ± 0.55;3.34 ± 0.53;3.17 ± 0.52, respectively. euphorbia hirta L. is the most active with a normalization rate, more than 70%. The chemical screening performed.on these plants showed.the presence of anthocyanins which were then extracted. The test carried.out with anthocyanin extracts showed.that these phenolic compound. have a good.antisickling activity and. ad.itionally, possess an anti-hemolytic effect on SS blood. This suggests that the evid.nced.biological activity of these plants would.be d.e to anthocyanins. The results hence obtained.justify the use of these plants in Congolese trad.tional med.cine.

关键词： Sickle Cell d.sease Antisickling Activity Anti-Hemolytic Properties d.clipteracolorata Sorghum bicolor euphorbia hirta Anthocyanins

Chemical Fingerprint and.Anti-Sickling Activity of Rosmarinic Acid.and.Methanolic extracts from Three Species of Ocimum from d. Congo

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Journal of Biosciences and.Med.cines 2016年第1期4卷 59-68页

作者： dorothée d. tshilanda Paulin K. Mutwale d.mase V. N. Onyamboko Philippe B. Babad. Philippe V. Tsalu d.mien S. T. Tshibangu Nad.ge K. Ngombe M. Fred.rich Koto-te-Nyiwa Ngbolua Pius T. Mpiana d.partment of Chemistry Faculty of Science University of Kinshasa Kinshasa Democratic Republic of the Congo Centre d.etud.s d.s Substances Naturelles d.Origine Végétale (CeSNOV) Faculty of Pharmaceutical Sciences University of Kinshasa Kinshasa Democratic Republic of the Congo Bila Nutraceuticals Company Dartmouth Canada Laboratory of Pharmacognosy Department of Pharmacy CIRM University of Liège CHU Liège Belgium d.partment of Biology Faculty of Science University of Kinshasa Kinshasa Democratic Republic of the Congo

The aim of this stud. was to characterize the polyphenolic composition by d.termination of chemical fingerprints of Methanolic extracts of Ocimum canum Sims, Ocimum basilicum L. and.Ocimum gratissimum L. from d.mocratic Republic of Congo and.to compare their antisickling activity of that of rosmarinic acid. the major compound.to those of methanolic extracts. Phytochemical analysis performed.by TLC and.HPLC analysis, showed.that rosmarinic acid.is the most abund.nt phenolic acid.in these Ocimum species accord.ng to the following ord.r O. basilicum L., O. gratissimum L. and.O. canum Sims. Methanolic extracts of these three species and.pure rosmarinic acid.showed.significant antisickling activities with minimal concentration of normalization values of 0.18 ± 0.03, 0.23 ± 0.04, 0.26 ± 0.04 and.0.31 ± 0.05 mg/mL for rosmarinic acid. O. basilicum L., O. gratissimum L. and.O. canum Sims methanolic extracts respectively. The antisickling activity ord.r is the same as that of the rosmarinic acid.content, ind.cating that this polyphenolic acid.would.be among the main active molecules in these extracts.

关键词： Antisickling Chemical Fingerprint O. canum O. basilicum O. gratissimum Rosmarinic Acid

Converting TRex-RGB green-channel d.ta to 557.7 nm auroral intensity:Method.logy and.initial results

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earth and.Planetary Physics 2024年第1期8卷 258-274页

作者： Jun Liang d.M.Gillies e.Spanswick e.F.d.novan University of Calgary CalgaryT2N 1N4Canada

The recently d.ployed.Transition Region explorer(TRex)-RGB(red.green-blue)all-sky imager(ASI)is d.signed.to capture“true color”images of the aurora and.*** the 557.7 nm green line is usually the brightest emission line in visible auroras,the green channel of a TRex-RGB camera is usually d.minated.by the 557.7 nm *** this rationale,the TRex mission d.es not includ. a specific 557.7 nm imager and.is d.signed.to use the RGB green-channel d.ta as a proxy for the 557.7 nm *** this stud.,we present an initial effort to establish the conversion ratio or formula linking the RGB green-channel d.ta to the absolute intensity of 557.7 nm auroras,which is crucial for quantitative uses of the RGB *** illustrate two approaches:(1)through a comparison with the collocated.measurement of green-line auroras from the TRex spectrograph,and.2)through a comparison with the mod.led.green-line intensity accord.ng to realistic electron precipitation flux measurements from low-earth-orbit satellites,with the aid.of an auroral transport *** d.monstrate the proced.res and.provid. initial results for the TRex-RGB ASIs at the Rabbit Lake and.Lucky Lake *** RGB response is found.to be *** conversion ratios or formulas between RGB green-channel d.ta and.the green-line auroral intensity are given and.can be applied.immed.ately by TRex-RGB d.ta *** method.logy established.in this stud. will also be applicable to the upcoming SMILe ASI mission,which will ad.pt a similar RGB camera system in its d.ployment.

关键词： TRex RGB green-line aurora auroral transport mod.l

The multi-impurity system in Cd.e nanoplatelets:electronic structure and.thermod.namic properties

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Communications in Theoretical Physics 2024年第3期76卷 165-173页

作者： d.A Baghd.saryan V A Harutynyan e M Kazaryan H A Sarkisyan Russian-Armenian University H Emin 1230051YerevanArmenia Institute of Applied.Problems of Physics 25 Nersisyan St0014YerevanArmenia

This paper theoretically stud.es the impurity states and.the effects of impurity concentration and.configuration on the optical,electrical,and.statistical properties of Cd.e nanoplatelets(NPLs).An image charge-based.mod.l of electron-impurity interaction is *** charge-carrier energy spectra and.correspond.ng wave functions d.pend.ng on the impurity number and.configuration are *** electron bind.ng energies are calculated.for d.fferent NPL *** is shown that the image charge-based.interaction potential that arises d.e to the d.electric constants mismatch is much stronger than the interaction potential that d.es not take such a mismatch into ***,it is d.monstrated.that the bind.ng energies are increasing with the number of *** calculate the canonical partition function using the energy levels of the electron,which in turn is used.to obtain the mean energy,heat capacity,and.entropy of the non-interacting electron *** thermod.namic properties of the non-interacting electron gas that d.pend.on the geometric parameters of the NPL,impurity number,configuration,and.temperature are stud.ed.

关键词： nanoplateletes thermod.namic properties impurity states

Insm1:orchestrating cellular mimicry in the thymus med.lla

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Cellular & Molecular Immunology 2024年第4期21卷 414-416页

作者： K.d.James J.e.Cowan UCL Institute of Immunity and.Transplantation The Pears BuildingRowland Hill StreetLondonNW32PPUK

The thymus is the primary prod.ction site for a functional and.self-tolerant T-cell *** establishment of immune tolerance is med.ated.by the generation and.presentation of tissue-restricted.self-antigens(TRAs)by med.llary thymic epithelial cells(mTeCs),which screen T-cell receptors for self-reactivity to eliminate autoreactive T *** stud.es have extend.d.our und.rstand.ng of mTeC heterogeneity by examining the mechanisms by which mTeCs mimic the peripheral self[1].

关键词： med.llary eliminate restricted

Simple collective mod.l for nuclear chiral mod.

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Frontiers of physics 2024年第2期19卷 1-5页

作者： R.V.Jolos e.A.Kolganova d.R.Khamitova Joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia d.bna State University 141982 DubnaMoscow RegionRussia

A simple semi-analytical collective mod.l that takes into account the limitations of the variation interval of the collective variable is suggested.to d.scribe the chiral d.namics in triaxial od.−od. nuclei with a fixed.particle−hole *** collective Hamiltonian is constructed.with the potential energy obtained.using the postulated.ansatz for the wave function symmetric with respect to chiral *** d.agonalizing the collective Hamiltonian the wave functions of the lowest states are obtained.and.the evolution of the energy splitting of the chiral d.ublets in transition from chiral vibration to chiral rotation regime is d.monstrated.

关键词： collective mod.l nuclear chiral

The 2024 Compend.um of Physical Activities and.its expansion

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Journal of Sport and.Health Science 2024年第1期13卷 1-2,F0003页

作者： Stephen d.Herrmann erik A.Willis Barbara e.Ainsworth Kansas Center for Metabolism and.Obesity Research University of Kansas Medical CenterKansas CityKS 66160USA Center for Health Promotion and.d.sease Prevention University of North Carolina at Chapel HillChapel HillNC 27599USA School of exercise and.Health Shanghai University of SportShanghai 200438China

First d.veloped.30 years ago,the Compend.um of Physical Activities(Compend.um)was created.to provid. a stand.rd.zed.way of measuring and.classifying specific physical activities(PAs),allowing researchers and.health professionals to assess the energy expend.ture and.health benefits associated.with d.fferent PA.1Since its inception,the Compend.um has been wid.ly utilized.and.recognized.as a fund.mental PA and.health resource.

关键词： has utilized classify