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Effects of nitrate concentration on biological hydrogen production by mixed cultures

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Frontiers of Environmental Science & Engineering 2009年第4期3卷 380-386页

作者： bo wang Wei WAN Jianlong wang Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China

The effects of nitrate on fermentative hydrogen production and soluble metabolites from mixed cultures were investigated by varying nitrate concentrations from 0 to 10 g N/L at 35℃ with an initial pH of *** results showed that the substrate degradation rate,hydrogen production potential,hydrogen yield,and average hydrogen production rate initially increased with increasing nitrate concentrations from 0 to 0.1 g N/L,while they decreased with increasing nitrate concentrations from 0.1 to 10 g N/*** maximum hydrogen production potential of 305.0 mL,maximum hydrogen yield of 313.1 mL/g glucose,and maximum average hydrogen production rate of 13.3 mL/h were obtained at a nitrate concentration of 0.1 g N/*** soluble metabolites produced by the mixed cultures contained only ethanol and acetic acid(HAc)without propionic acid(HPr)and butyric acid(HBu).This study used the Modified Logistic model to describe the progress of cumulative hydrogen production in batch tests.A concise model was proposed to describe the effects of nitrate concentration on average hydrogen production rate.

关键词： nitrogen source biohydrogen fermentative hydrogen production quantitative kinetic model

Diffeomorphism Classification of Smooth Weighted Complete Intersections

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Acta Mathematica Sinica,English Series 2012年第2期28卷 299-312页

作者： Jian bo wang Yu Yu wang Department of Mathematics Tianjin UniversityTianjin 300072P.R.China College of Mathematical Science Tianjin Normal UniversityTianjin 300387 P.R.China

Xn（d1,...,dr-1,dr.;w） and Xn（e1,...,er-1,dr;w） are two complex odd-dimensional smooth weighted complete intersections defined in a smooth weighted hypersurfaee

关键词： Weighted projective space weighted complete intersection weighted hypersurface diffeo-morphism classification

Disentangling the relative contributions of variables determining the divergence of hoarding strategies of rodents

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Current Zoology 2024年第2期70卷 270-272页

作者： bo wang School of Resources and Environmental Engineering Anhui UniversityHefei 230601China Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration Anhui UniversityHefei 230601China Anhui Shengjin Lake Wetland Ecology National Long-Term Scientific Research Base DongzhiAnhui 247230China

Understanding the driving mechanism of the divergence of hoarding strategies of animals(i.e.,scatter-hoarding ***-hoarding)is crucial to understand the ecological and evolutionary implications of plant-animal *** et al.(2022)compiled a global-scale dataset from the published literature including 183 species of seed-hoarding rodents,and concluded that phylogenetic conservatism,functional traits,and environmental factors counted for the hoarding behavior divergence of rodents.A more thought-provoking question may be asked:Do these variables contribute equally or not to explain the divergence of hoarding strategies?Here,we re-analyzed Zhang et al's(2022)dataset using partial Ralk calculation(Ives 2019)to parse out the relative contri-lik butions of these variables.

关键词： hoarding strategies rodents

DNA G-Quadruplexes as Targets for Natural Product Drug Discovery

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Engineering 2024年第7期38卷 39-51页

作者： Kai-bo wang Yingying wang Jonathan Dickerhoff Danzhou Yang borch Department of Medicinal Chemistry and Molecular Pharmacology College of PharmacyPurdue UniversityWest LafayetteIN 47907USA Purdue Center for Cancer Research Purdue UniversityWest LafayetteIN 47907USA Department of Chemistry Purdue UniversityWest LafayetteIN 47907USA Purdue Institute for Drug Discovery Purdue UniversityWest LafayetteIN 47907USA Jiangsu Key Laboratory of Bioactive Natural Product Research&State Key Laboratory of Natural Medicines China Pharmaceutical UniversityNanjing 210009China

DNA guanine(G)-quadruplexes(G4s)are unique secondary structures formed by two or more stacked Gtetrads in G-rich DNA *** structures have been found to play a crucial role in highly transcribed genes,especially in cancer-related oncogenes,making them attractive targets for cancer ***,targeting oncogene promoter G4 structures has emerged as a promising strategy to address the challenge of undruggable and drug-resistant proteins,such as MYC,BCL2,KRAS,and *** products have long been an important source of drug discovery,particularly in the fields of cancer and infectious *** progress has recently been made in the discovery of naturally occurring DNA G4-targeting *** DNA G4s,such as MYC-G4,BCL2-G4,KRAS-G4,PDGFR-b-G4,VEGF-G4,and telomeric-G4,have been identified as potential targets of natural products,including berberine,telomestatin,quindoline,sanguinarine,isaindigotone,and many ***,we summarize and evaluate recent advancements in natural and nature-derived DNA G4 binders,focusing on understanding the structural recognition of DNA G4s by small molecules derived from *** also discuss the challenges and opportunities associated with developing drugs that target DNA G4s.

关键词： G-quadruplex Natural products Alkaloids Cancer Promoter

Energy and centrality dependence of light nuclei production in relativistic heavy-ion collisions

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Nuclear Science and Techniques 2022年第4期33卷 62-71页

作者： Li-Lin Zhu bo wang Meng wang Hua Zheng Department of Physics Sichuan UniversityChengdu 610064China School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710119China

We study the energy and centrality dependence of deuteron and triton(helium-3)production in relativistic heavy-ion collisions at the BNL Relativistic Heavy Ion Collider(RHIC)and CERN Large Hadron Collider(LHC)using the Tsallis distribution,blast-wave(BW)model,and stationary Fokker-Planck(FP)*** study shows that good agreement can be reached between the fitting results from the stationary FP solution and the experimental data for Au+Au collisions from the beam energy scan(BES)program of RHIC at√SNN=7.7,11.5,14.5,19.6,27,39,62.4,and 200 GeV and for Pb+Pb collisions at√SNN=2.76 *** Tsallis distribution and BW model can reasonably describe the deuteron and triton(helium-3)trans verse momentum spectra obtained at RHIC and LHC.A more comprehensive comparison among the three methods suggests that the stationary FP solution is a sensible method,which is able to describe the energy dependence of the light nuclei yield ratio N_(t)N_(p)/N_(d)^(2) and provide a coherent description of deuteron and triton(helium-3)production for all centralities and various colliding energies at RHIC and LHC.

关键词： Light nucleiproduction Heavy-ioncollisions Tsallis distribution Blast-wavemodel Fokker–Planck solution

Microscopic states of Kerr black holes from boundary-bulk correspondence

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Chinese Physics C 2021年第1期45卷 383-391页

作者： Jing-bo wang Institute for Gravitation and Astrophysics College of Physics and Electronic EngineeringXinyang Normal UniversityXinyang 464000China

It was previously claimed by the author that black holes can be considered as topological insulators. both black holes and topological insulators have boundary modes, and the boundary modes can be described by an effective BF theory. In this paper, the boundary modes on the horizons of black holes are analyzed using methods developed for topological insulators. BTZ black holes are analyzed first, and the results are found to be compatible with previous works. The results are then generalized to Kerr black holes, for which new results are obtained: dimensionless right-and left-temperatures can be defined and have well behavior in both the Schwarzschild limit a → 0 and the extremal limit a → M. Upon the Kerr/CFT correspondence, a central charge c = 12 Mr+ can be associated with an arbitrary Kerr black hole. Moreover, the microstates of the Kerr black hole can be identified with the quantum states of this scalar field. From this identification, the number of microstates of the Kerr black hole can be counted, yielding the Bekenstein-Hawking area law for the entropy.

关键词： boundary modes BTZ black hole Kerr black hole

Annealing Effect on Wear Resistance of Nanostructured 316L Stainless Steel Subjected to Dynamic Plastic Deformation

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Journal of Materials Science & Technology 2012年第10期28卷 871-877页

作者： bo wang Bin Yao Zhong Han Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

Bulk nanostructured 316L austenitic stainless steel （SS） samples with nano-scale twin bundles embedded in nano-sized grains were synthesized by using dynamic plastic deformation （DPD）. Subsequent thermal an-nealing of the as-DPD sample leads to a single austenitic structure with static recrystallized （SRX） grains in nanostructured matrix. Oil-lubricated sliding tests of ball-on-disc type were carried out for the as-DPD and the as-annealed DPD steel samples in comparison with coarse grained （CG） steel samples. Experimental results show that the as-DPD 316L steel exhibits a little enhanced wear resistance under a load of 10 N, and nearly identical wear resistance under a load of 30 N relative to that of the CG sample. After annealing, the wear resistance roughly follows the Archard equation under a load of 10 N. However, the wear resistance increases with increasing hardness, and decreases with a further increase in hardness under a load of 30 N. The highest wear resistance can be found in the DPD sample annealed at 750 ℃ for about 20 min, which is more than 46% higher than that of the CG steel sample. This phenomenon is originated from the microstructure with an optimized combination of strength and ductility as a result of moderate plastic deformation in SRX grained regions.

关键词： Nanostructrued metals Stainless steel Wear resistance Annealing Subsurfacemicrostructure

Dry modification of electrode materials by roller vibration milling at room temperature

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Particuology 2008年第5期6卷 383-388页

作者： Shengjuan Li Shulin wang bo Xu Department of Power Engineering University of Shanghai for Science and Technology 516 Jungong Road Shanghai 200093 China

For the first time dry roller vibration milling at room temperature was used to prepare active carbon （AC） nano-particles and to modify MnO2 powder as electrode materials. In 30 min AC was milled to a mean particle size of 30-50 nm with increased crystallinity and higher specific surface area, predominantly mesoporous and with improved pore diameter distribution. Then, AC nano-particles were incorporated with MnO2 or bismuth-doped MnO2 nano-particles synthesized by sol-gel methods to prepare nano-composite electrode materials for studying their electrochemical performance. The AC nano-particles combined with 10 wt.% bismuth-doped MnO2 nano-particles were found to possess excellent electrochemical property with specific capacitance up to 308 F/g and without obvious attenuation with increasing current. Our method seems to ooen a new way to imorove AC based electrode materials used for clean energy such as suner capacitors.

关键词： Active carbon Roller vibration milling Electrode materials Nano-materials Super-capacitors

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重庆市中心城区儿童友好城市规划路径研究

城市建筑 2025年第1期22卷 88-92页

作者：李圆圆王波西南大学园艺园林学院重庆市北碚区妇女联合会

在全国推行儿童友好城市和社区创建的背景下,重庆市积极探索具有地域特色的儿童友好城市规划。文章结合国内外儿童友好城市和社区的研究基础和建设经验,以社区规划师和高校研究者的双重身份介入,从服务空间、活动空间、出行空间三个方面... 详细信息

在全国推行儿童友好城市和社区创建的背景下,重庆市积极探索具有地域特色的儿童友好城市规划。文章结合国内外儿童友好城市和社区的研究基础和建设经验,以社区规划师和高校研究者的双重身份介入,从服务空间、活动空间、出行空间三个方面,针对重庆市中心城区提出儿童友好城市和社区的规划指引,并依托三级规划指引要求,为科学有序推进儿童友好相关工作提供参考路径。

关键词：儿童友好城市和社区规划指引重庆市中心城区实践路径

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