检索结果-内蒙古大学图书馆

A novel photocatalytic mechanism of volatile organic compounds degradation on BaTiO_(3)under visible light:Photo-electrons transfer from photocatalyst to pollutant

引用

Chinese Chemical Letters 2025年第3期36卷 182-187页

作者： Teng Wang Jiachun Cao Juan Li Didi Li Zhimin Ao Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health Guangdong Key Laboratory of Environmental Catalysis and Health Risk ControlKey Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of EducationInstitute of Environmental Health and Pollution ControlSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China Advanced Interdisciplinary Institute of Environment and Ecology Guangdong Provincial Key Laboratory of Wastewater Information Analysis and Early WarningBeijing Normal UniversityZhuhai 519087China

Wide bandgap semiconductors are typically activated under ultraviolet(UV)light irradiation for volatile organic compounds(VOCs)***,our previous study discovered that certain VOCs can interact with some wide bandgap semiconductors,formatting an intermediate bandgap between the VOCs and the conduction band of wide bandgap semiconductor,thus inducing visible light activation of the system,and photo-generated electrons are excited by visible light and transferred from the VOCs to the conduction band of *** this work,BaTiO_(3),traditionally is not active under visible light irradiation,however showed degradation rates of 100%and 20%for styrene and toluene under visible light,*** functional theory(DFT)calculations indicate that the adsorption of styrene or toluene on the BaTiO_(3)surface reduces its bandgap from 2.93 eV to 1.36 eV and 2.26 eV,*** intermediate bandgap in this system is primarily formed by the valence band of BaTiO_(3)and the VOCs,and indicating that photo-generated electrons directly transfer from BaTiO_(3)to the VOCs under visible light,inducing degradation reactions of VOCs,i.e.,this work discovered a new transfer pathway of photo-electrons direct from the valence band of BaTiO_(3)to VOCs,while photo-electrons are from VOCs to the conductive band of wide-bandgap semiconductors in our previous work.

关键词： Volatile organic compounds Photocatalytic Degradation Wide-bandgap semiconductors Density functional theory Degradation mechanism

来源：评论

学校读者我要写书评

暂无评论

Age and fluid source constraints of the Haoyaoerhudong orogenic gold deposit,North China:Evidence from geochronology and noble gas isotopes

引用

Geoscience Frontiers 2024年第4期15卷 176-195页

作者： Chenglong Fan Jingwen Mao Huishou Ye Yitian Wang Junchen Liu Wei Jian Xuyang Meng Wenhao Tang Weiwei Chao Peng Wang School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China MNR Key Laboratory for Exploration Theory&Technology of Critical Mineral Resources China University of GeosciencesBeijing 100083China Ministry of Natural Resources(MNR)Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources by the Province and Ministry Guilin University of TechnologyGuilin 541004China State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013JiangxiChina School of Earth Sciences and Spatial Information Engineering Hunan University of Science and TechnologyXiangtan 411201China

The Haoyaoerhudong gold deposit,located in the northwestern part of the North China craton(NCC),has produced over 120 metric tonnes(t)of gold since *** has a total reserve of>240 t at average gold grade of 0.62 g/t,making it one of the largest open pit gold mines in *** steeply dipping,large-tonnage,low-grade,vein-or veinlet-type gold orebodies are hosted in strongly-deformed Mesoproterozoic carbonaceous schist of the Bayan Obo *** laminated/boudinaged veins/veinlets in the sinistral ductile-brittle shear zones are dominated by quartz,biotite,gold-bearing löllingite,pyr-rhotite,(arseno)pyrite,with minor native gold,titanite and *** this paper,we present new in situ U-Pb geochronological data on magmatic zircon from the preore dikes,on metamorphic and hydrothermal xenotime,and on hydrothermal titanite from the hydrothermally altered carbonaceous schist and auriferous quartzsulfides veins/veinlets,as well as He-Ar isotopic analysis on gold-bearing(arseno)pyrite in the syn-ore *** metamorphic xenotime U-Pb age of 426±6.0 Ma(2σ)records a regional metamorphic event,possibly related to the accretion of the Bainaimiao arc onto the *** pre-ore andesitic dikes yielded similar emplacement ages at~278 Ma constrained by laser ablation-inductively coupled plasma-mass spectrometry(LA-ICP-MS)U-Pb zircon *** xenotime grains from the altered carbonaceous schist and auriferous quartz-sulfides veins yielded U-Pb ages of 256.0±4.1 Ma(2σ)and 254.4±2.1 Ma(2σ),respectively,overlapping with that of the hydrothermal titanite at 255.4±0.8 Ma(2σ)from the laminated quartz-sulfides *** indicates that the gold mineralization occurred at ca.255 ***~255 Ma gold mineralization age is much younger than the previously reported Early-Middle Permian regional magmatic activity(ca.291 Ma to 268 Ma),and may be associated with the regional sinistral strike-slip event in the late orogenic cycle related to the collision between the Siberian craton

关键词： Xenotime Titanite In situ U-Pb dating Noble gas Orogenic gold deposit North China Craton

来源：评论

学校读者我要写书评

暂无评论

Insights into the mechanism of L-malic acid on drip loss of chicken meat under commercial conditions

引用

Journal of Animal science and Biotechnology 2024年第3期15卷 1312-1324页

作者： Haijun Sun Xue Yan Lu Wang Ruimin Zhu Meixia Chen Jingdong Yin Xin Zhang State Key Laboratory of Animal Nutrition and Feeding College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China New Hope Liuhe Co. Ltd./Key Laboratory of Feed and Livestock and Poultry Products Quality&Safety ControlMinistry of AgricultureChengduSichuan 610023China Institute of Animal Husbandry and Veterinary Medicine Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China

Background A deterioration in the meat quality of broilers has attracted much more attention in recent years.L-malic acid(MA)is evidenced to decrease meat drip loss in broilers,but the underlying molecular mechanisms are still ***’s also not sure whether the outputs obtained under experimental conditions can be obtained in a com-mercial ***,we investigated the effects and mechanisms of dietary MA supplementation on chicken meat drip loss at large-scale *** Results showed that the growth performance and drip loss were improved by MA *** metabolome revealed that L-2-aminoadipic acid,β-aminoisobutyric acid,eicosapentaenoic acid,and nicotinamide,as well as amino acid metabolism pathways connected to the improvements of meat quality by MA *** transcriptome analysis further indicated that the effect of MA on drip loss was also related to the proper immune response,evidenced by the enhanced B cell receptor signaling pathway,NF-κB signaling pathway,TNF signaling pathway,and IL-17 signaling *** We provided evidence that MA decreased chicken meat drip loss under commercial *** and transcriptome revealed a comprehensive understanding of the underlying ***,MA could be used as a promising dietary supplement for enhancing the water-holding capacity of chicken meat.

关键词： Drip loss Immune response L-malic acid Meat quality Metabolome Transcriptome

来源：评论

学校读者我要写书评

暂无评论

Crystal Structure and Chirality Properties of Cobalt and Copper Uridine-5'-Diphosphate

SSRN

引用

SSRN 2024年

作者： Li, Hui Li, Zhongkui Yan, Li Zhong, Xue Zhang, MengLei Analysis & Testing Center of Beijing Institute of Technology Beijing Institute of Technology China MOE Key Laboratory of Cluster Science School of Chemistry and Chemical Engineering Beijing Institute of Technology China

In this paper, two nucleotide coordination polymers, {[Cu3(UDP)2(bipy)2]}n (1) and {[Co(UDP)(bipy)(H2O)2]·[Co2(UDP)(bipy)(H2O)6]·6H2O}n (2) (Na2UDP= uridine-5'-diphosphate disodium salt), were carefullly designed and synthesized. Single crystal X-ray diffraction indicated that complex 1 was a 3D coordination polymer, it is the first time we have observed the coordination of oxygen atoms on the base of uracil nucleotide molecules with metal ions in single crystal structure. Complex 2 was 2D coordination polymer with two different layer structures, namely {[Co(UDP)(bipy)(H2O)2]n}n- and {[Co2(UDP)(bipy)(H2O)6]·6H2On}n+. The pre-assembly behavior of 1 and 2 in solution were studied by UV-Vis and 1H-NMR spectroscopy. In addition, based on 1 and 2 crystal structure, their chiral properties investigated via circular dichroism (CD) spectra in solution and in solid state © 2024, The Authors. All rights reserved.

关键词： Single crystals

来源：评论

学校读者我要写书评

暂无评论

TSCMR:Two-Stage Cross-Modal Retrieval 9th

TSCMR:Two-Stage Cross-Modal Retrieval

引用

19th International Conference on Advanced Data Mining and Applications, ADMA 2023

作者： Chen, Zhihao Wang, Hongya School of Computer Science and Technology Donghua University Shanghai China State Key Laboratory of Computer Architecture Institute of Computing Technology CAS Beijing China Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai China

ISBN: (纸本)9783031466731

Currently, large-scale vision and language models has significantly improved the performances of cross-modal retrieval tasks. However, large-scale models require a substantial amount of computing resources, so the execution of these models on devices with limited resources is challenging. Thus, it is paramount to reduce the model size and minimize computing costs of a model without sacrificing its performance. In this paper, we improved TERAN by dividing cross-modal retrieval into two stages: image-text coarse-grained matching and image-text fine-grained matching. Specifically, we present a novel approach called Two-Stage Cross-Modal Retrieval network(TSCMR). To reduce model size after model training, our approach utilized a new knowledge distillation method for Transformer-based models. Experiments have shown that our approach maintains a performance comparable to TERAN on the MS-COCO 1K test set, while being 2x smaller and 3.1x faster on inference. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.

关键词： Distillation

来源：评论

学校读者我要写书评

暂无评论

Modeling and analysis of Spectral Polarization BRDF Using Dispersion Model 5

Modeling and Analysis of Spectral Polarization BRDF Using Di...

引用

5th International Conference on Optoelectronic science and Materials, ICOSM 2023

作者： Huang, Baorui Peng, Bo Ren, Qifeng Liao, Sheng Institute of Optics and Electronics Chinese Academy of Sciences Chengdu610209 China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China National Key Laboratory of Optical Field Manipulation Science and Technology Chinese Academy of Sciences Chengdu610209 China Key Laboratory of Science and Technology on Space Optoelectronic Precision Measurement Chinese Academy of Sciences Chengdu610209 China University of Chinese Academy of Sciences Beijing100049 China

ISBN: (纸本)9781510674547

The bidirectional reflectance distribution function (BRDF) integrates reflection and scattering phenomena to describe the spatial reflection characteristics of the object surface. A modified spectral expression for the complex refractive index of the medium is established using the Drude-Lorentz dispersion model, and it is substituted into the polarization microfacet BRDF to obtain a spectral polarization BRDF(p-BRDF) based on the microfacet theory. Particle swarm optimization algorithm is used to fit the parameters in the model by combining the complex refractive index data and in-plane BRDF data of brass, the optimal standard mean squared error of parameter selection is 0.01. The simulated data is highly consistent with the experimental data, and the optimal adjusted R2 is 0.9854. The results indicate that the spectral p-BRDF model combined with limited experimental data can effectively predict the spatial reflection characteristics of object surfaces. © 2024 SPIE.

关键词： Reflection

来源：评论

学校读者我要写书评

暂无评论

Incorporating Bias in Multi-Penalty Regularization for Improved LF-NMR Data Inversion 4

Incorporating Bias in Multi-Penalty Regularization for Impro...

引用

4th International Conference on Electronic Information Engineering and Computer Communication, EIECC 2024

作者： Xu, Jingyun Chen, Gang Liu, Kewen Wuhan University of Technology School of Information Engineering Wuhan China University of Chinese Academy of Sciences Beijing China Innovation Academy for Precision Measurement Science and Technology Key Laboratory of Magnetic Resonance in Biological Systems Wuhan China

ISBN: (纸本)9798331534622

Low-field nuclear magnetic resonance (LF-NMR) detection technology is widely used in the fields of petroleum, materials, etc. due to its advantages such as precision, stability, and non-destructiveness. The collected LF-NMR signal can obtain the relaxation time distribution through inversion technology, realizing sample identification and component analysis at the molecular level. Although the existing regularization method can improve the accuracy of the inversion results to a certain extent, it is not effective in dealing with the problem of data baseline offset. The baseline offset will cause the algorithm to mistakenly believe that the signal has not been completely attenuated, thereby erroneously introducing ultra-long relaxation components. In order to solve this problem, we add a bias term to the traditional regularization term. In the experimental part, we use simulated data and real LF-NMR data to test the proposed method. The results show that the regularization method with the addition of a bias term improves the accuracy of the inversion results while maintaining computational efficiency. Especially in dealing with baseline offset problems, erroneous ultra-long relaxation components can be effectively eliminated. © 2024 IEEE.

关键词： Nuclear magnetic resonance

来源：评论

学校读者我要写书评

暂无评论

Switching of CO_(2)hydrogenation selectivity via chlorine poisoning over Ru/TiO_(2)catalyst

引用

Nano Research 2023年第4期16卷 4786-4792页

作者： Jin Zhang Mengting Gao Ruiyi Wang Xincheng Li Tianfen Huang Jing Wang Yunwei Wang Zhanfeng Zheng State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Chemical Engineering and Technology North University of ChinaTaiyuan 030051China

It is fascinating to explore the distribution of CO_(2)hydrogenation products regulated by heterogeneous catalysts,as both the chemical state of surface metals and structure of the support itself of the supported catalysts may affect the performance of CO_(2)***,the complete switching of CO_(2)hydrogenation products from CH4 to CO can be realized by induction of Cl into Ru/TiO_(2)*** functional theory(DFT)calculations indicated that Cl ions were mainly located on the Ru metal sites of Ru/TiO_(2)*** charge analysis and Ru 3p X-ray photoelectron spectra(XPS)results suggested that electrons transferred from Ru to Cl,resulting in the decrease of electron density of *** situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)of CO_(2)hydrogenation and CO adsorption proved that with the increase of the Cl ion content,the adsorption of CO on the catalyst surface was significantly weakened,and resulted in the high CO *** work demonstrates the role of Cl ions in regulating the distribution of CO_(2)hydrogenation products,and provides new ideas for regulating other catalytic processes.

关键词： CO_(2)hydrogenation selectivity regulation chlorine poisoning Ru nanoparticles CO adsorption

来源：评论

学校读者我要写书评

暂无评论

Transcriptome dynamics of hippocampal neurogenesis in macaques across the lifespan and aged humans

引用

细胞研究（英文版） 2022年第8期32卷 729-743页

作者： Wei Wang Mengdi Wang Meng Yang Bo Zeng Wenying Qiu Qiang Ma Xiaoxi Jing Qianqian Zhang Bosong Wang Chonghai Yin Jiyao Zhang Yuxin Ge Yufeng Lu Weizhi Ji Qian Wu Chao Ma Xiaoqun Wang State Key Laboratory of Cognitive Neuroscience and Learning IDG/McGovern Institute for Brain ResearchBeijing Normal UniversityBeijingChina State Key Laboratory of Brain and Cognitive Science CAS Center for Excellence in Brain Science and Intelligence Technology(Shanghai)Institute of BiophysicsChinese Academy of SciencesBeijingChina State Key Laboratory of Brain and Cognitive Science CAS Center for Excellence in Brain Science and Intelligence Technology(Shanghai)Institute of BiophysicsChinese Academy of SciencesBeijingChina Changping Laboratory BeijingChina University of Chinese Academy of Sciences BeijingChina State Key Laboratory of Brain and Cognitive Science CAS Center for Excellence in Brain Science and Intelligence Technology(Shanghai)Institute of BiophysicsChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina Changping Laboratory BeijingChina Institute of Basic Medical Sciences Neuroscience CenterNational Human Brain Bank for Development and FunctionChinese Academy of Medical Sciences Department of Human Anatomy Histology and EmbryologySchool of Basic MedicinePeking Union Medical CollegeBeijingChina State Key Laboratory of Cognitive Neuroscience and Learning IDG/McGovern Institute for Brain ResearchBeijing Normal UniversityBeijingChina State Key Laboratory of Brain and Cognitive Science CAS Center for Excellence in Brain Science and Intelligence Technology(Shanghai)Institute of BiophysicsChinese Academy of SciencesBeijingChina Yunnan Key Laboratory of Primate Biomedical Research Institute of Primate Translational MedicineKunming University of Science and TechnologyKunmingYunanChina State Key Laboratory of Cognitive Neuroscience and Learning IDG/McGovern Institute for Brain ResearchBeijing Normal UniversityBeijingChina Changping Laboratory BeijingChina State Key Laboratory of Cognitive Neuroscience and Learning IDG/McGovern Institute for Brain ResearchBeijing Normal UniversityBeijingChina State Key Laboratory of Brain and Cog

Whether adult hippocampal neurogenesis(AHN)persists in adult and aged humans continues to be extensively debated.A major question is whether the markers identified in rodents are reliable enough to reveal new neurons and the neurogenic trajectory in ***,to provide a better understanding of AHN in primates and to reveal more novel markers for distinct cell types,droplet-based single-nucleus RNA sequencing(snRNA-seq)is used to investigate the cellular heterogeneity and molecular characteristics of the hippocampi in macaques across the lifespan and in aged *** of the major cell types in the hippocampus and their expression profiles were *** dynamics of the neurogenic lineage was revealed and the diversity of astrocytes and microglia was *** the neurogenic lineage,the regulatory continuum from adult neural stem cells(NSCs)to immature and mature granule cells was investigated.A group of primate-specific markers were *** validated ETNPPL as a primate-specific NSC marker and verified STMN1 and STMN2 as immature neuron markers in ***,we illustrate a cluster of active astrocytes and microglia exhibiting proinflammatory responses in aged *** interaction analysis and the comparative investigation on published datasets and ours imply that astrocytes provide signals inducing the proliferation,quiescence and inflammation of adult NSCs at different stages and that the proinflammatory status of astrocytes probably contributes to the decrease and variability of AHN in adults and elderly individuals.

关键词： Ageing Neural stem cells

来源：评论

学校读者我要写书评

暂无评论

Aggregation-based analytical chemistry in point-of-care nanosensors

Aggregate

引用

Aggregate 2024年第5期5卷 23-85页

作者： Yuechun Li Zhaowen Cui Lunjie Huang Daohong Zhang Yizhong Shen Jie Cheng Jianlong Wang College of Food Science and Engineering Northwest A & F UniversityYanglingShaanxiChina College of Biomass Science and Engineering Sichuan UniversityChengduChina School of Food & Biological Engineering Key Laboratory for Agricultural Products Processing of Anhui ProvinceHefei University of TechnologyHefeiChina Institute of Quality Standards and Testing Technologies for Agro-Products Chinese Academy of Agricultural SciencesBeijingChina

It is crucial to realize the point-of-care(POC)testing of harmful analytes,capa-ble of saving limited agricultural resources,assisting environmental remediation,ensuring food safety,and enabling early disease *** with other conventional POC sensing strategies,aggregation-based analytical chemistry facil-itates the practical-oriented development of POC nanosensors by altering the aggregation status of nanoprobes through the action of multiple aggregation-induced“forces”originating from the ***,we have proceeded with a comprehensive review focusing on the aggregation-based analytical chemistry in POC nanosensors,covering aggregation-induced“forces”,aggregation-induced signal transductions,aggregation-induced POC nanosensing strategies,and their applications in biomolecular monitoring,food safety analysis,and environmental ***,challenges existing in practical applications have been fur-ther proposed to improve their sensing applications,and we expect our review can speed up the development of cost-effective,readily deployable,and time-efﬁcient nanosensors through aggregation-based analytical chemistry.

关键词： aggregation-based analytical chemistry biomolecular monitoring environmental monitoring food safety analysis point-of-care nanosensors

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：