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Longitudinal changes in body weight of breastfeeding mothers in the first year after delivery and its relationship with human milk composition:a combined longitudinal and cross-sectional cohort study

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Food Science and Human Wellness 2024年第1期13卷 254-264页

作者： Huijuan Ruan yajie zhang Qingya Tang Xuan Zhao Xuelin Zhao Yi Xiang Wei Geng Yi Feng Wei Cai Department of Clinical Nutrition Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200092China Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition Shanghai Institute of Pediatric ResearchShanghai 200092China Department of Pediatric Surgery Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200092China

Objective:Postpartum weight retention(PPWR)is a common problem among women after childbirth.The main objectives of this study are to understand the changes in body weight of breastfeeding mothers during long-term follow-up and preliminarily explore the relationship between maternal body weight and human milk composition,including macronutrients,leptin,and adiponectin.Methods:The study included a longitudinal cohort(122 mothers),and a cross-sectional cohort(37 mothers).The human milk,maternal weight,and dietary surveys were collected in the longitudinal cohort at different follow-up time points(1-14 days postpartum,2-4 months postpartum,5-7 months postpartum,and 12-17 months postpartum).The maternal body weight was analyzed using the responses in the survey questionnaires.A milk analyzer based on the mid-infrared spectroscopy(MIRS)was used to determine milk composition,and nutrition analysis software evaluated dietary intakes.In the cross-sectional cohort,participating mothers were asked to provide blood and human milk samples and pertinent information related to maternal body composition.Maternal body composition was measured by bioelectrical impedance analysis(BIA),while ELISA analyzed leptin and adiponectin in milk and serum.Results:At 5-7 months postpartum,the PPWR of breastfeeding mothers was(2.46±3.59)kg.At 12-17 months postpartum,the PPWR was(0.98±4.06)kg.PPWR was found to be negatively correlated with milk fat content within 14 days postpartum and positively correlated at 2-4 months postpartum.In addition,the maternal weight and body muscle mass were positively correlated with leptin and adiponectin in milk.Plasma leptin was positively correlated with the mother’s body weight,body mass index(BMI),FAT percentage,and body fat mass,while plasma adiponectin did not correlate with any parameter.The results also indicate that the PPWR did not correlate with leptin and adiponectin in plasma or milk.Conclusions:Breastfeeding mothers may retain considerable weight gain one year after delivery.Human milk composition

关键词： Human milk Milk composition Body weight Body mass index(BMI) Weight gain Postpartum weight retention

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Recent Progress on Organic Near-Infrared Photodetectors:Mechanism,Devices,and Applications

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Chinese Journal of Chemistry 2023年第8期41卷 958-978页

作者： Qingkai Wang yajie zhang Zhixiang Wei CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190 China

Comprehensive Summary Near infrared light organic photodetectors have attracted tremendous attention due to their tailorable response,ease of processing,compatibility with flexible substrate,room temperature operation and broad applications such as remote sensing,health monitoring,artificial vision,night vision,and so on.Recently,the great improvement obtained on the important figures of merit performances has made organic photodetectors catch up and even surpass those of inorganic photodetectors in some respects.In this review,after a brief illustration of the organic photodetectors'figures of merit performances,we summarize the research progress of panchromatic and narrowband near infrared light organic photodetectors from their working mechanism,strategies to achieve narrowband near infrared light organic photodetectors,to some practical applications.Finally,we discuss the development challenge of the near infrared light organic photodetectors.

关键词： Organic photodetectors Near-infrared Panchromatic Narrowband Applications

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Conductance of a single molecule C_(60)-SnPc heterojunction

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Chinese Chemical Letters 2022年第2期33卷 1074-1076页

作者： Yifan Wang Mingjun Zhong Jie Li Hao Tang Richard Berndt yajie zhang Shimin Hou Yongfeng Wang Key Laboratory for the Physics and Chemistry of Nanodevices and Center for Carbon-based Electronics Department of ElectronicsPeking UniversityBeijing 100871China CEMES-CNRS Boîte Postale 94347Toulouse 31055France Institut für Experimentelle und Angewandte Physik Christian-Albrechts-Universität zu KielKiel D-24098Germany Beijing Academy of Quantum Information Sciences Beijing 100193China Institute of Spin Science and Technology South China University of TechnologyGuangzhou 511442China

Geometries of molecule-molecule interfaces strongly influence the current passing from one molecule to another. The contact conductance of molecule-molecule junctions which consist of fullerene and tin phthalocyanine molecules is investigated with a low-temperature scanning tunneling microscope. Two types of molecules are deposited onto Cu(111). Fullerene molecules are transferred to tips through controlled contact of STM tips on molecules. The molecule-molecule junctions are formed by approaching fullereneterminated tips to tin phthalocyanine molecules on Cu(111). Our experimental method can be extended to study the intermolecular charge transport of a range of molecular junctions.

关键词： Single-molecule electronics Switch C_(60) Phthalocyanine STM

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5-Hydroxymethylfurfural: A key intermediate for efficient biomass conversion

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Journal of Energy Chemistry 2015年第5期24卷 548-551页

作者： yajie zhang Jian zhang Dangsheng Su Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences Shenyang National Laboratory for Material Science Institute of Metal Research Chinese Academy of Sciences

Biomass has been widely accepted as a ＂zero-emission＂ energy carrier to take place fossil fuels, while its catalytic conversion is still limited by low efficiency of carbon atoms. Biomass conversion via 5- hydroxymethylfurfural （HMF） as a platform chemical is highly attractive because almost all carbon atoms could he retained in the downstream chemicals under mild reaction conditions. Here we summarize recent fundamental researches and industrial progresses on all involved processes including biomass degradation to hexoses, HMF formation, hydrogenation and oxidation of HMF.

关键词： Biomass conversion 5-Hydroxymethylfur rural Catalysis Energy

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Chinese Chemical Letters 2023年第1期34卷 203-205页

作者： Mingjun Zhong Qimeng Wu Liang Ma Jie Li Yifan Wang Yansong Wang Xin Li yajie zhang Jingtao Lü Yongfeng Wang Center for Carbon-based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices Department of ElectronicsPeking UniversityBeijing 100871China Key Laboratory for Microstructural Material Physics of Hebei Province School of ScienceYanshan UniversityQinhuangdao 066004China School of Physics Institute for Quantum Science and Engineeringand Wuhan National High Magnetic Field CenterHuazhong University of Science and TechnologyWuhan 430074China Beijing Academy of Quantum Information Sciences Beijing 100193China Institute of Spin Science and Technology South China University of TechnologyGuangzhou 511442China

Spin properties of organic molecules have attracted great interest for their potential applications in spintronic devices and quantum computing.Fe-tetraphenyl porphyrin(Fe TPP)is of particular interest for its robust magnetic properties on metallic substrates.Fe TPP is prepared in vacuum via on-surface synthesis.Molecular structure and spin-related transport properties are characterized by low-temperature scanning tunneling microscope and spectroscopy at 0.5 K.Density functional theory calculations are performed to understand molecular adsorption and spin distribution on Au(111).The molecular structure of Fe TPP is distorted upon adsorption on the substrate.Spin excitations of Fe TPP are observed on the Fe atom and high pyrrole groups in differential conductance spectra.The calculated spin density distribution indicates that the electron spin of Fe TPP is mainly distributed on the Fe atom.The atomic transmission calculation indicates that electrons transport to substrate is mediated through Fe atom,when the tip is above the high pyrrole group.

关键词： Spintronics Spin excitation Atomic transmission Fe-tetraphenyl porphyrin STM

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The levels of osteopontin in human milk of Chinese mothers and its associations with maternal body composition

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Food Science and Human Wellness 2022年第5期11卷 1419-1427页

作者： Huijuan Ruan Qingya Tang Xuan Zhao yajie zhang Xuelin Zhao Yi Xiang Wei Geng Yi Feng Wei Cai Department of Clinical Nutrition Xinhua Hospital Affi liated to Shanghai Jiao Tong University School of MedicineShanghai 200092China Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition Shanghai Institute of Pediatric ResearchXinhua Hospital Affi liated to Shanghai Jiao Tong University School of Medicine Shanghai 200092China Department of Pediatric Surgery Xinhua Hospital Affi liated to Shanghai Jiao Tong University School of MedicineShanghai 200092China

Objective:This study explored the content and change trend of osteopontin(OPN)in breast milk and analyzed the relationship between OPN in breast milk and maternal body composition.Methods:Breast-feeding mothers were recruited in Xinhua Hospital to collect breast milk and provide pertinent information.The content of OPN in breast milk was determined by enzyme-linked immunosorbent assay(ELISA).Determination of protein content in human milk was performed via the BCA method.The maternal body composition was determined by the bioelectrical impedance method.Serum glucocorticoid receptorα,adiponectin,insulin,and leptin were determined by ELISA.SPSS 25 was used for statistical analysis.Results:In the longitudinal cohort,106 mothers provided 318 milk samples at different lactation periods.The results indicate that the OPN showed dynamic changes.OPN levels were(343.2±163.5)mg/L during 1-14 days postpartum,(228.4±121.5)mg/L during 2-4 months postpartum,and(204.8±100.6)mg/L during 5-7 months postpartum.The content of OPN was very high in the first 1-14 days postpartum and then decreased.Compared with early postpartum milk,the OPN content of mature milk showed a significant relationship with maternal weight-related parameters.Additional body composition analysis was performed in 88 women at the mature milk phase.The results show that the OPN in milk is related to the mother’s body composition,especially the content of skeletal muscle mass,but not to relevant humoral factors.Conclusions:The levels of OPN in human milk of Chinese mothers showed dynamic changes with the extension of lactation time.The OPN in human milk was related to the mother’s body composition but not related to related humoral factors.

关键词： Osteopontin Human milk Body composition Breastfeeding

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Field-effect transistor chemical sensors of single nanoribbon of copper phthalocyanine

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Science China Chemistry 2009年第6期52卷 751-754页

作者： yajie zhang WenPing Hu Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China

Copper phthalocyanine (CuPc) nanoribbon field-effect transistors were implemented as chemical sensors. They showed fast response and high reversibility in the detection of the tetrahydrofuran atmosphere at room temperature. The drain current of the field-effect transistor sensor decreased from 6.7 to 0.2 nA when the transistor was measured under the tetrahydrofuran atmosphere. The sensor was self-refreshable in a few minutes. These results demonstrate that the organic single crystalline nanoribbon transistors could effectively act as chemical sensors.

关键词： CuPc nanoribbon field-effect transistor THF sensor

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Model test and discrete element method simulation of shield tunneling face stability in transparent clay

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Frontiers of Structural and Civil Engineering 2021年第1期15卷 147-166页

作者： Huayang LEI yajie zhang Yao HU Yingnan LIU School of Civil Engineering Tianjin UniversityTianjin 300350China Key Laboratory of Coast Civil Structure Safety(Tianjin University) Ministry of EducationTianjin 300350China Key Laboratory of Earthquake Engineering Simulation and Seismic Resilience of China Earthquake Administration(Tianjin University) Tianjin 300350China

The stability of the shield tunneling face is an extremely important factor affecting the safety of tunnel construction.In this study,a transparent clay with properties similar to those of Tianjin clay is prepared and a new transparent clay model test apparatus is developed to overcome the“black box”problem in the traditional model test.The stability of the shield tunneling face(failure mode,influence range,support force,and surface settlement)is investigated in transparent clay under active failure.A series of transparent clay model tests is performed to investigate the active failure mode,influence range,and support force of the shield tunneling face under different burial depth conditions,whereas particle flow code three-dimensional numerical simulations are conducted to verify the failure mode of the shield tunneling face and surface settlement along the transverse section under different burial depth conditions.The results show that the engineering characteristics of transparent clay are similar to those of soft clay in Binhai,Tianjin and satisfy visibility requirements.Two types of failure modes are obtained:the overall failure mode(cover/diameter:C/D£1.0)and local failure mode(C/D≥2.0).The influence range of the transverse section is wider than that of the longitudinal section when C/D≥2.0.Additionally,the normalized thresholds of the relative displacement and support force ratio are 3%-6%and 0.2-0.4,respectively.Owing to the cushioning effect of the clay layer,the surface settlement is significantly reduced as the tunnel burial depth increases.

关键词： shield tunneling face stability transparent clay model test numerical simulation

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Structure transformation from Sierpiński triangles to chains assisted by gas molecules

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National Science Review 2023年第7期10卷 151-158页

作者： Chao Li Zhen Xu yajie zhang Jie Li Na Xue Ruoning Li Mingjun Zhong Tianhao Wu Yifan Wang Na Li Ziyong Shen Shimin Hou Richard Berndt Yongfeng Wang Song Gao Center for Carbon-based Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices School of Electronics Peking University Institut für Experimentelle und Angewandte Physik Christian-AlbrechtsUniversit ?t zu Kiel Central Laboratory Tianjin Key Laboratory of Epigenetics for Organ Development in Preterm Infants the Fifth Central Hospital of Tianjin Institute of Spin Science and Technology South China University of Technology

Reversible transformations between fractals and perio dic structures are of fundamental importance for understanding the formation mechanism of fractals.Currently,it is still a challenge to controllably achieve such a transformation.We investigate the effect of CO and CO2molecules on Sierpiński triangles(STs)assembled from Fe atoms and 4,4″-dicyano-1,1′:3′,1″-terphenyl(C3PC) molecules on Au surfaces.Using scanning tunneling microscopy,we discover that the gas molecules induce a transition from STs into 1D chains.Based on density functional theory modeling,we propose that the atomistic mechanism involves the transformation of a stable 3-fold coordination Fe(C3PC)3motif to Fe(C3PC)4with an axially bonded CO molecule.CO2causes the structural transformation through a molecular catassembly process.

关键词： scanning probe microscopy fractals metal–organic motifs CO Sierpiński triangles

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英国国家科研与创新署的战略规划及启示

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科技管理研究 2024年第4期44卷 20-26页

作者：张雅洁任真中国科学院文献情报中心北京100190 中国科学院大学经济与管理学院信息资源管理系北京100049

制定战略规划对科学资助机构的发展至关重要。2022年3月,英国国家科研与创新署(UKRI)首次发布五年期战略,以促进英国成为全球科学超级大国,其下属机构同时发布了一系列配套实施规划,形成清晰完整的战略规划体系。以UKRI的战略规划体系... 详细信息

制定战略规划对科学资助机构的发展至关重要。2022年3月,英国国家科研与创新署(UKRI)首次发布五年期战略,以促进英国成为全球科学超级大国,其下属机构同时发布了一系列配套实施规划,形成清晰完整的战略规划体系。以UKRI的战略规划体系为研究对象,梳理和分析其战略目标实施举措、进展监测、绩效评估和经费投入等内容和要点,指出其在总体战略、下属机构合作规划、各机构的实施规划这3个层面的战略框架设计保持一致,在基础设施建设和对人才资助计划方面的经费预算大幅增长,联合下属机构集中力量应对国家面临的重大挑战和重大需求,也将增加对其提出的七大技术群以及国内区域均衡发展等方面的投入。基于此,从对战略实施开展监测与评估、单独制定科学资助机构国际合作战略、加强科学资助机构内部组织管理、基于科学资助机构战略规划促进中英双边科技合作等4个方面提出政策建议,以期为中国科学资助机构的战略规划制定与实施、促进中英科学资助机构的双边合作提供启示。

关键词：英国国家科研与创新署战略规划科学资助机构基金资助中英科技合作英国经验

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