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Protein & Cell 2023年第11期14卷 807-823页

作者： shengtao gao Jinfeng Wang College of Food Science&Nutritional Engineering China Agricultural UniversityBeijing 100083China

Microbes are commonly sensitive to shifts in the physiological and pathological state of their hosts,including mothers and babies.From this perspective,the microbiome may be a good indicator for diseases during pregnancy and has the potential to be used for perinatal health monitoring.This is embodied in the application of microbiome from multi body sites for auxiliary diagnosis,early prediction,prolonged monitoring,and retrospective diagnosis of pregnancy and infant complications,as well as nutrition management and health products developments of mothers and babies.Here we summarized the progress in these areas and explained that the microbiome of different body sites is sensitive to different diseases and their microbial biomarkers may overlap between each other,thus we need to make a diagnosis prudently for those diseases.Based on the microbiome variances and additional anthropometric and physical data,individualized responses of mothers and neonates to meals and probiotics/prebiotics were predictable,which is of importance for precise nutrition and probiotics/prebiotics managements and developments.Although a great deal of encouraging performance was manifested in previous studies,the efficacy could be further improved by combining multi-aspect data such as multi-omics and time series analysis in the future.This review reconceptualizes maternal and infant health from a microbiome perspective,and the knowledge in it may inspire the development of new options for the prevention and treatment of adverse pregnancy outcomes and bring a leap forward in perinatal health care.

关键词： newborn microbiome disease detection pregnancy management health care products

The mechanisms of enhanced thickness-dependent DC breakdown strength of EP/MWCNTs nanocomposites

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High Voltage 2024年第2期9卷 440-452页

作者： Zhen Li He gao Longfei Zhang Shouming Wang Ji Liu shengtao Li Key Laboratory of Engineering Dielectrics and Its Application Ministry of EducationHarbin University of Science and TechnologyHarbinChina State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'anChina

Owing to advanced power electronic and electrical applications developing towards miniaturisation and integration,the thickness-dependent DC breakdown mechanism of epoxy/multiwall-carbon-nanotube nanocomposites is under investigation.The results indicate that the breakdown strength of nanocomposites containing 0.05 wt%multiwall-carbon-nanotubes rises by~18%,and the breakdown strength falls exponentially with increasing thickness.To clarify the microscopic mechanism,a simulation model of DC breakdown,including carriers transport and segmental dynamics,is developed,and the accordant simulation results with experimental results indicate that the thickness-dependent DC breakdown of epoxy/multiwall-carbon-nanotube nanocomposites is determined both by segment chain dynamics and charge transport.According to the breakdown model analysis,the effects of multiwall-carbon-nanotube on enhanced breakdown strength are caused by the increased amount of deep traps in the interfacial region,while the influence of thickness is attributed to the enlarged segment chain displacement and electric field distortion as the voltage raising time increases.

关键词： strength breakdown nanocomposites

Heat stress impacts the multi-domain ruminal microbiota and some of the functional features independent of its effect on feed intake in lactating dairy cows

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Journal of Animal Science and Biotechnology 2022年第6期13卷 1902-1916页

作者： Tansol Park Lu Ma shengtao gao Dengpan Bu Zhongtang Yu Department of Animal Sciences The Ohio State UniversityColumbusOHUSA Department of Animal Science and Technology Chung-Ang UniversityAnseong-siGyeonggi-doRepublic of Korea State Key Laboratory of Animal Nutrition Institute of Animal ScienceChinese Academy of Agricultural SciencesBeijing 100193People’s Republic of China CAAS-ICRAF Joint Lab on Agroforestry and Sustainable Animal Husbandry Beijing 100193People’s Republic of China

Background:Heat stress(HS)affects the ruminal microbiota and decreases the lactation performance of dairy cows.Because HS decreases feed intake,the results of previous studies were confounded by the effect of HS on feed intake.This study examined the direct effect of HS on the ruminal microbiota using lactating Holstein cows that were pair-fed and housed in environmental chambers in a 2×2 crossover design.The cows were pair-fed the same amount of identical total mixed ration to eliminate the effect of feed or feed intake.The composition and structure of the microbiota of prokaryotes,fungi,and protozoa were analyzed using metataxonomics and compared between two thermal conditions:pair-fed thermoneutrality(PFTN,thermal humidity index:65.5)and HS(87.2 for daytime and 81.8 for nighttime).Results:The HS conditions altered the structure of the prokaryotic microbiota and the protozoal microbiota,but not the fungal microbiota.Heat stress significantly increased the relative abundance of Bacteroidetes(primarily Gram-negative bacteria)while decreasing that of Firmicutes(primarily Gram-positive bacteria)and the Firmicutes-toBacteroidetes ratio.Some genera were exclusively found in the heat-stressed cows and thermal control cows.Some co-occurrence and mutual exclusion between some genera were also found exclusively for each thermal condition.Heat stress did not significantly affect the overall functional features predicted using the 16S rRNA gene sequences and ITS1 sequences,but some enzyme-coding genes altered their relative abundance in response to HS.Conclusions:Overall,HS affected the prokaryotes,fungi,and protozoa of the ruminal microbiota in lactating Holstein cows to a different extent,but the effect on the structure of ruminal microbiota and functional profiles was limited when not confounded by the effect on feed intake.However,some genera and co-occurrence were exclusively found in the rumen of heat-stressed cows.These effects should be attributed to the direct effect of heat stress on the host metabolism,physiolog

关键词： Functional profiles Heat stress Microbiome Multi-kingdom Network analysis Ruminal microbiota

N-doped residual carbon from coal gasification fine slag decorated with Fe_(3)O_(4)nanoparticles for electromagnetic wave absorption

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Journal of Materials Science & Technology 2022年第9期104卷 98-108页

作者： Jun He shengtao gao Yuanchun Zhang Xingzhao Zhang Hanxu Li School of Chemical Engineering Anhui University of Science and TechnologyHuainan 232001China Institute of Energy Hefei Comprehensive National Science CenterHefei 230031China

The electromagnetic wave absorption(EMWA)performance of materials is affected by their dielectric and magnetic properties.Here,ferroferric oxide@N-doped residual carbon(Fe_(3)O_(4)@NRC)composites were successfully fabricated by decorating NRC with Fe_(3)O_(4)nanoparticles via a facile chemical co-precipitation method.The RC was obtained through acid treatment to remove the inorganic minerals in coal gasification fine slag.The structure,composition,thermal stability,morphology,and related EM parameters of the as-fabricated Fe_(3)O_(4)@NRC composites were thoroughly tested via analytical techniques.Notably,both the Fe_(3)O_(4)@NRC-2 and Fe_(3)O_(4)@NRC-3 composites exhibited superior EMWA capacity.When 40%mass was added,the value of minimal reflection loss(RL_(min))for Fe_(3)O_(4)@NRC-2 was-37.4 dB,and the effective absorption bandwidth(EAB,RL≤-10 dB)reached 4.16 GHz(13.84-18.00 GHz)at a thickness of 1.5 mm.Besides,the value of impedance matching was 1.00 as the RL_(min)was achieved.The results demonstrated that the EMWA performance of the composites could be adjusted by controlling the content of Fe_(3)O_(4)nanoparticles.The magnetic/carbon composites exhibited superior EMWA performance,thus promoting the resource utilization of residual carbon in coal gasification fine slag from coal gasification.

关键词： Residual carbon Fe_(3)O_(4) Nitrogen-doped Electromagnetic wave absorption Impedance matching

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煤气化细灰理化性质及其电磁波吸收性能

复合材料学报 2024年第5期41卷 2559-2574页

作者：高圣涛张元春安徽理工大学化学工程学院煤炭安全精准开采国家地方联合工程研究中心淮南232001

煤气化技术作为煤炭清洁利用的主要途径之一在中国得到快速发展,细灰是煤气化过程中不可避免产生的新型固体废物。国家对绿色、清洁生产和发展循环经济逐步推行,细灰的资源化利用和无害化处理技术成为实现煤气化技术环保效益和经济效益... 详细信息

煤气化技术作为煤炭清洁利用的主要途径之一在中国得到快速发展,细灰是煤气化过程中不可避免产生的新型固体废物。国家对绿色、清洁生产和发展循环经济逐步推行,细灰的资源化利用和无害化处理技术成为实现煤气化技术环保效益和经济效益兼得的关键所在。以煤气化细灰为研究对象,对细灰进行干燥、球磨预处理得到中位径为2μm的样品,利用XRD、Raman、SEM、TEM和XPS等分析测试技术对其晶体结构、微观形貌、组成、分子构造和元素化学态进行表征,并测试了细灰电磁波吸收性能。结果表明:细灰中含有部分石墨化的碳和单质铁,具有较完整的孔隙结构,这为其作为电磁波吸收材料提供了可能性;细灰/石蜡吸波剂在较薄厚度下同时表现出较宽的有效吸收带宽和一定强度的反射损耗,当匹配厚度为1.7 mm时,该吸波剂在15.6 GHz时达到最小反射损耗值,为-17.6 dB,此时有效吸收带宽(反射损耗值≤-10 dB)达到4.2 GHz。此外,雷达散射截面模拟结果表明:该吸波涂层能有效降低完美导体基板的电磁波散射。

关键词：煤气化细灰电磁波吸收煤炭清洁利用理化性质固体废物

Supplementation with sodium butyrate improves growth and antioxidant function in dairy calves before weaning

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Journal of Animal Science and Biotechnology 2021年第1期12卷 305-313页

作者： Wenhui Liu ALa Teng Zhu La Alexander Evans shengtao gao Zhongtang Yu Dengpan Bu Lu Ma Institute of Animal Science State Key Laboratory of Animal NutritionChinese Academy of Agricultural SciencesNo.2 Yuanmingyuan West RoadBeijing 100193People’s Republic of China School of Agriculture&Food Science University College DublinBelfieldDublin 4Ireland Department of Animal Sciences The Ohio State UniversityColumbusOH 43210USA Joint Laboratory on Integrated Crop-Tree-Livestock Systems of the Chinese Academy of Agricultural Sciences(CAAS) Ethiopian Institute of Agricultural Research(EIAR)and World Agroforestry Center(ICRAF)Beijing 100193People’s Republic of China.

Background: There is increasing research interest in using short-chain fatty acids(SCFAs) including butyrate as potential alternatives to antibiotic growth promoters in animal production. This study was conducted to evaluate the effects of supplementation of sodium butyrate(SB) in liquid feeds(milk, milk replacer, and the mixture of both)on the growth performance, rumen fermentation, and serum antioxidant capacity and immunoglobins in dairy calves before weaning. Forty healthy female Holstein calves(4-day-old, 40 ± 5 kg of body weight) were housed in individual hutches and randomly allocated to 1 of 4 treatment groups(n = 10 per group) using the RAND function in Excel. The control group was fed no SB(SB0), while the other three groups were supplemented with 15(SB15),30(SB30), or 45(SB45) g/d of SB mixed into liquid feeds offered. The calves were initially fed milk only(days 2 to 20), then a mixture of milk and milk replacer(days 21 to 23), and finally milk replacer only(days 24 to 60).Results: The SB supplementation enhanced growth and improved feed conversion into body weight gain compared with the SB0 group, and the average daily gain increased quadratically with increasing SB supplementation. No significant effect on rumen pH;concentrations of NH_3-N, individual and total VFAs;or acetate:propionate(A:P) ratio was found during the whole experimental period. Serum glutathione peroxidase activity increased linearly with the increased SB supplementation, while the serum concentration of maleic dialdehyde linearly decreased. Serum concentrations of immunoglobulin A, immunoglobulin G, or immunoglobulin M were not affected by the SB supplementation during the whole experimental period.Conclusions: Under the conditions of this study, SB supplementation improved growth performance and antioxidant function in pre-weaned dairy calves. We recommended 45 g/d as the optimal level of SB supplementation mixed into liquid feeds(milk or milk replacer) to improve the growth and antioxidant function of dairy calves before weaning

关键词： Antioxidant activity Calf Immune function Sodium butyrate

Nutrient value of wild fodder species and the implications for improving the diet of mithun (Bos frontalis) in Dulongjiang area, Yunnan Province, China

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Plant Diversity 2020年第6期42卷 455-463页

作者： Yanfei Geng Sailesh Ranjitkar Qiaoshun Yan Zhijun He Baqi Su shengtao gao Junli Niu Dengpan Bu Jianchu Xu College of Tea Science Guizhou UniversityGuiyang 550025China Key Laboratory of Economic Plants and Biotechnology Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China CAAS-ICRAF Joint Lab on Agroforestry and Sustainable Animal Husbandry World AgroforestryEast and Central AsiaBeijing 100193China NGene Solutions of Natural InnovationKathmanduGPO 44614Nepal Mid-Western University Faculty of Humanities and Social ScienceNaya BatoLalitpur 44600Nepal Agriculture Bureau of Gongshan Derung and Nu Autonomous County Nujiang 673500China State Key Laboratory of Animal Nutrition Institute of Animal ScienceChinese Academy of Agricultural SciencesBeijing 100193China College of Animal Science and Technology Shihezi UniversityShihezi 832003China Hunan Co-Innovation Center of Animal Production Safety CICAPSChangsha 410128China World Agroforestry East and Central AsiaKunming 650201China

Wild fodder plants are valuable because they provide an important livestock feed resource globally,especially for smallholder farmers,and have important roles in natural resource management.In-depth knowledge of wild forage plants can motivate local people for feed resource and habitat conservation of threatened herbivores such as Mithun(Bos frontalis).Mithun occur in small patches in the mountains of Dulongjiang,nearby villagers domesticated this animal but left animal to freely graze in the mountains.Many fodder plants occur in these mountains,however,little is known about their nutritional value.We conducted an ethnobotanical survey to document important wild fodder plants consumed by mithun in the Dulongjiang Township.The nutritional content of 21 highly mentioned wild fodder plants in an ethnobotanical survey was examined.Laboratory analysis showed that Fagopyrum dibotrys were the fodder species with the highest crude protein(CP)content(26.89%),followed by Polygonum molle(21.88%)and Hydrangea longipes(21.12%).Synthesis of relative feed value index and grey relational grade,P.molle,H.longipes and Tetrastigma obtectum were ranked the top three nutritional fodders.There was a significant difference between 21 species on their in vitro digestibility and the most highly digestible fodder species was Elatostema hookerianum.Linear model analysis on relationship between frequency of citation of 21 wild forage plants by local farmers and their nutrient composition showed that the frequency was significantly positively correlated with the nutritional value of the feed(R2?0.28,P<0.05).We concluded that these species have high nutritional values to improve mithun production in integrated crop-livestock systems.Fodder species or mixtures of species with useful nutritional characters could be cultivated to improve livestock productivity,habitat conservation including that of mithun and wild forage resource management.

关键词： Wild fodder species Nutritional value Mithun Nature conservation

New branched benign compounds including double antibiotic scaffolds:synthesis,simulation and adsorption for anticorrosion effect on mild steel

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Frontiers of Chemical Science and Engineering 2023年第2期17卷 167-182页

作者： Yueting Shi Lingli Chen shengtao Zhang Hongru Li Fang gao College of Chemistry and Chemical Engineering Chongqing UniversityChongqing 400044China

In this study,two novel environmental benign double antibiotic norfloxacin or ciprofloxacin scaffolds included branched molecules were prepared by multi-step routes and purified by simple performance,which were used as the target compounds(TCs).Meanwhile,a single norfloxacin or ciprofloxacin skeleton based molecules were synthesized as the reference compounds(RCs).The molecular geometry optimization and material simulation computation revealed that TCs presented smaller HOMOLUMO energy gaps and larger binding energy levels on mild steel surface than RCs.The chemical adsorption of TCs on steel surface was confirmed by X-ray photoelectron spectroscopy,which could be processed by TCs chelation with iron ions.It was shown that TCs could be self-adsorbed on steel surface,which was demonstrated by atomic force microscopy and scanning electron microscopy.The anticorrosion of the studied compounds for mild steel in HCl solution was investigated by electrochemistry analysis.The results suggested that the anticorrosion efficiency could reach 95.86%(TC1)and 97.05%(TC2)at 0.050 mmol·L^(−1) based on electrochemical impedance spectroscopy,which were much better than RCs(RC1,69.23%;RC2,74.16%).The adsorption isotherms of TCs on steel were further fitted,and a deep insight on adsorption was discussed.

关键词： branched compounds floxacin scaffold mild steel anticorrosion environmentally benign

Double open mouse-like terpyridine parts based amphiphilic ionic molecules displaying strengthened chemical adsorption for anticorrosion of copper in sulfuric acid solution

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Chinese Journal of Chemical Engineering 2023年第5期57卷 233-246页

作者： Yueting Shi Junhai Zhao Lingli Chen Hongru Li shengtao Zhang Fang gao College of Chemistry and Chemical Engineering Chongqing UniversityChongqing 400044China

In this study,the benign target double terpyridine parts based amphiphilic ionic molecules(AIMs 1,2)and the reference single terpyridine segment included AIMs(AIMs 3,4)were synthesized through a multi-step method,and the molecular structures were fully characterized.The excellent anticorrosion of the target AIMs for copper surface in H_(2)SO_(4) solution was demonstrated by the electrochemistry analysis,which was more superior over those of the reference AIMs.The standard adsorption free energy changes of the target AIMs calculated by the adsorption isotherms were lower than -40 kJ·mol^(-1),suggesting an intensified chemical adsorption on metal surface.The molecular modeling and molecular dynamic computation of the studied AIMs were performed,demonstrating that the target AIMs exhibited lower highest occupied molecular orbital-lowest unoccupied molecular orbital energy gaps and greater adsorption energies than the reference ones.The chemical adsorption of the AIMs on metal surface was revealed by various spectroscopic methods including scanning electron microscopy,atomic force microscopy,Fourier transform infrared spectroscopy,attenuated total reflection infrared spectroscopy,Raman and X-ray diffraction.

关键词： Amphiphilic ionic molecule Adsorption Corrosion Electrochemistry Copper H_(2)SO_(4)solution

Surface flashover in 50 years:Theoretical models and competing mechanisms

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High Voltage 2023年第5期8卷 853-877页

作者： Zhen Li Ji Liu Yoshimichi Ohki George Chen He gao shengtao Li Key Laboratory of Engineering Dielectrics and Its Application Ministry of EducationHarbin University of Science and TechnologyHarbinChina State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'anChina Research Institute for Materials Science and Technology Waseda UniversityShinjuku‐kuJapan School of Electronics and Computer Science University of SouthamptonSouthamptonUK

Surface flashover is a devastating electronic avalanche along the gas–solid interface when a high electric field is applied,which is a potential issue that threatens the safe operations of advanced power electronic,electrical,and spacecraft applications.However,the underlying physical mechanisms for surface flashover development are still under investigation owing to the complex charge transport processes through the gas phase,solid phase,and gas–solid interface.In this study,the history of surface flashover theory in the last 50 years is introduced,and several key questions are reviewed from the perspective of the competing mechanisms of charge transport:the role of each phase in a surface flashover,the origin of surface charging,and effects of traps in solid on surface flashover.Then,some suggestions involve charge transport processes in each phase,and their correlations are put forward,and a predictable‘charge transport competitive flashover model’is proposed by clarifying the competing mechanisms of charge transport processes through multiple phases.This study summarises the history and hot topics of physical mechanisms of surface flashover proposed based on classic and recent progress and offers promising routes for developing a more precise surface flashover theory and improving surface flashover performances.

关键词： flash transport charge