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Association of Serum Folate and Vitamin B_(12) Concentrations with Obesity in Chinese Children and Adolescents

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Biomedical and Environmental Sciences 2024年第3期37卷 242-253页

作者： ZHU Qian Rang KOK E Dieuwertje BEKELE Hailu Tesfaye MANUSAMA koen ZHANG Jing Xian XIE Wei ZONG Wen Qi ZUO Hui ZHANG Jian KAMPMAN Ellen DAI Yue Jiangsu Provincial Center for Disease Control and Prevention Nanjing 210009JiangsuChina Division of Human Nutrition and Health Wageningen University&ResearchWageningen 176700 AAThe Netherlands School of Public Health Medical College of Soochow UniversitySuzhou 215123JiangsuChina National Institute for Nutrition and Health Chinese Center for Disease Control and PreventionBeijing 100050China

Objective This study aimed to evaluate the associations of serum folate and/or vitamin B12 concentrations with obesity among Chinese children and *** A cross-sectional study was conducted including 3,079 Chinese children and adolescents,aged 6 to 17 years,from Jiangsu,*** indices,such as,children's body mass index(BMI),BMI z-scores,waist circumference,and waist-to-height ratio were *** linear regression and generalized additive models were used to investigate the associations of serum folate and vitamin B12 levels with anthropometric indices and odds of *** We observed that serum vitamin B12 concentrations were inversely associated with all anthropometric indices and the odds of general obesity[odds ratio(OR)=0.68;95%confidence interval(CI)=0.59,0.78]and abdominal obesity(OR=0.68;95%CI=0.60,0.77).When compared to participants with both serum vitamin levels in the two middle quartiles,those with both serum folate and vitamin B12 levels in the highest quartile were less prone to general(OR=0.31,95%CI=0.19,0.50)or abdominal obesity(OR=0.46,95%CI=0.31,0.67).Conversely,participants with vitamin B12 levels in the lowest quartile alongside folate levels in the highest quartile had higher odds of abdominal obesity(OR=2.06,95%CI=1.09,3.91).Conclusion Higher serum vitamin B12 concentrations,but not serum folate concentrations,were associated with lower odds of childhood *** and adolescents with high levels of vitamin B12 and folate were less likely to be obese.

关键词： Folate Vitamin B12 Childhood obesity Micronutrient

Study on Pollution Cost Control Model under Asymmetric Information Based on Principal Agent

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Journal of Systems Science and Information 2021年第5期9卷 549-557页

作者： Lina WANG koen.milis Stephen POELMANS School of Economics and Management Hainan Normal UniversityHaikou 571158China Campus Vesta Education Management IndustryBrusselsBelgium Faculty of Economics and Management Hogeschool-Universiteit BrusselKULeuven AssociationWarmoesberg 26Brussel 1000Belgium

Pollution cost control is key to solve pollution *** paper takes pollution control cost of pollution control contract between management authority and pollutant discharge enterprise as research object,considers pollution control quality level,pollution control quality inspection and pollution control cost model,and establishes pollution control cost model of management authority and pollutant discharge enterprise,including rational constraints of pollutant discharge *** it analyzes principal-agent relationship between the two under condition of asymmetric information,and un-observability of pollution control level is shown as hiding information of sewage *** essence,it is problem of adverse selection in *** control cost of management is objective *** first order condition of pollution control cost of sewage enterprise is transformed into state space equation,and optimal control of problem is solved by using maximum *** particular,management authority,as principal,uses pollution control provisions to reward,punish and encourage pollutant discharge enterprises as agents.

关键词： principal agent asymmetric information pollution cost control

A new perspective on intervertebral disc calcification—from bench to bedside

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Bone Research 2024年第1期12卷 50-61页

作者： Emanuel J.Novais Rajkishen Narayanan Jose A.Canseco koen van de Wetering Christopher K.Kepler Alan S.Hilibrand Alexander R.Vaccaro Makarand V.Risbud Department of Orthopaedic Surgery Sidney Kimmel Medical CollegeThomas Jefferson UniversityPhiladelphiaPAUSA Unidade Local de Saúde do Litoral Alentejano Orthopedic DepartmentSantiago do CacémPortugal Rothman Orthopedic Institute at Thomas Jefferson University PhiladelphiaPAUSA

Disc degeneration primarily contributes to chronic low back and neck ***,there is an urgent need to understand the spectrum of disc degeneration phenotypes such as fibrosis,ectopic calcification,herniation,or mixed *** these phenotypes,disc calcification is the least *** calcification,by definition,is the pathological mineralization of soft tissues,widely studied in the context of conditions that afflict vasculature,skin,and ***,disc calcification is associated with poor surgical outcomes and back pain refractory to conservative *** is frequently seen as a consequence of disc aging and progressive degeneration but exhibits unique molecular and morphological characteristics:hypertrophic chondrocyte-like cell differentiation;TNAP,ENPP1,and ANK upregulation;cell death;altered Pi and PPi homeostasis;and local *** studies in mouse models have provided a better understanding of the mechanisms underlying this *** is essential to recognize that the presentation and nature of mineralization differ between AF,NP,and EP ***,the combination of anatomic location,genetics,and environmental stressors,such as aging or trauma,govern the predisposition to ***,the systemic regulation of calcium and Pi metabolism is less important than the local activity of PPi modulated by the ANK-ENPP1 axis,along with disc cell death and differentiation *** there is limited understanding of this phenotype,understanding the molecular pathways governing local intervertebral disc calcification may lead to developing disease-modifying drugs and better clinical management of degeneration-related pathologies.

关键词： degeneration metabolism intervertebral

SCM Implementation Decisions Under Asymmetric Information: An Agency Approach

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Journal of Systems Science and Information 2020年第5期11卷 447-457页

作者： Lina WANG Stephen POELMANS koen.milis School of Economics and Management Hainan Normal UniversityHaikou 571158China Faculty of Economics and Management Hogeschool-Universiteit BrusselKU Leuven AssociationWarmoesberg 261000 BrusselsBelgium Campus Vesta Education Management IndustryBrusselsBelgium

The optimization investment policy decision of SCM-supply chain management-implementation has been analysed under symmetric and asymmetric information *** both conditions,SCM implementation optional decision optimizing models have been *** these models,both clients and vendors try to pursue their own *** upon the principal-agent theory,the models show to what extent a principal(a client)needs to pay more to an agent(a vendor)in a context of asymmetric *** the client it is important to understand the extra costs to be able to adopt effective strategies to stimulate a vendor to perform an optimal implementation of a SCM *** results of a simulation experiment regarding SCM implementation options illustrate and verify the theoretical findings and confirm the general notion that the less informed party is obliged to pay information rent to the better-informed party.

关键词： SCM implementation problems asymmetric information implementation control cost evaluation level principal-agent theory

Molecularly horizontal stacking benefits charge separation through delocalized charge transfer states at donor-acceptor interfaces

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Molecularly horizontal stacking benefits charge separation t...

Improving Radiation Pattern Roundness of Henge-Like Metaring-Loaded Monopoles Above a Finite Ground for MIMO Systems

第十一届新型太阳能材料科学与技术学术研讨会

作者： Xiangkun Jia David Beljonne Donato Spoltore koen Vandewal Department of Physics Zhengzhou University Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics Technische Universit?t Dresden Laboratory for Chemistry of Novel Materials University of Mons Institute for Materials Research (IMO-IMOMEC) Hasselt University

The energetic landscape at the interface between electron donating and accepting molecular materials favors efficient conversion of intermolecular charge-transfer(CT) states into free charge carriers in high-performance organic solar ***,we elucidate how interfacial energetics,charge generation and radiative recombination are affected by molecular *** experimentally determine the CT dissociation properties of a series of model,small molecule donor-acceptor blends,where the used acceptors(B2PYMPM,B3PYMPM and B4PYMPM) differ only in the nitrogen position of their lateral pyridine rings.[1] We find that the formation of an ordered,face-on molecular packing in B4PYMPM is beneficial to efficient,field-independent charge separation,leading to fill factors above 70% in photovoltaic devices.[2] This is rationalized by a comprehensive computational protocol showing that,compared to the more amorphous and isotropically oriented B2PYMPM,the higher structural order in face-on B4PYMPM molecules leads to more delocalized CT ***,we find no correlation between the quantum efficiency of free charge carrier radiative recombination and the bound or unbound nature of the CT *** work highlights the importance of structural ordering at donor-acceptor interfaces for efficient free carrier generation and shows that less bound CT states do not preclude efficient radiative recombination.[3]

关键词： Charge-transfer states molecular packing exciton dissociation energy landscape non-radiative voltage losses

来源： cnki会议评论

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Electromagnetic Science 2024年第2期2卷 104-115页

作者： Bo Zhang Zhi Ning Chen Yucong Zhou Qun Lou Jiahao Wang koen Mouthaan Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore Huawei Technologies Co. Ltd.Shenzhen 518129China

A henge-like metaring(HMR)is proposed for improving the radiation pattern roundness of monopole antennas offcenter mounted on a finite ground by localizing the radiation from the monopole and suppressing the scattering by the *** improved patterns enhance uniform coverage of multiple-input and multiple-output(MIMO)*** study reveals that the radiation pattern of an off-center monopole is distorted by the asymmetric ground currents excited by both the feed and the radiation of the *** distorted radiation patterns severely degrade wireless communication link *** HMR,composed of an annular array of mushroom unit cells,simultaneously functions as an electromagnetic bandgap(EBG)and a radiator,and encircles the monopole to form a henge monopole antenna(HMA).The HMR as an EBG is used to suppress the ground currents outside the HMR analyzed by an equivalent circuit *** HMR as a radiator is designed to decouple the monopole from the ground with its elevated radiation pattern using characteristic mode *** examples,two prototypes of single and four off-center MIMO HMAs are designed and investigated in the 2.45-GHz *** and measured results show that the single HMA and each of the four HMAs achieve the un-roundness of the radiation pattern atθ=65°plane lower than 2 dB and 3 dB in the 2.45-GHz *** a result,near the radiation nulls,the SNR is improved by 6 *** compact construction and efficient current suppression facilitate the application of HMAs in multi-antenna systems above a finite ground with uniform coverage and reliable connections.

关键词： Antenna radiation pattern Characteristic mode analysis Metamaterials MIMO communication Omnidirectional antennas Wireless access points

Application of the Shrinking Particle Model for the Evaluation of Molecular Recyclability of PET versus Semi-Aromatic Polyesters

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Open Journal of Physical Chemistry 2024年第2期14卷 21-35页

作者： Jack van Schijndel Sanne de Krom Dennis Molendijk koen van Beurden Amarante Böttger Research Group Biopolymers/Green Chemistry Centre of Expertise Safe & Resilient Society Avans University of Applied Science Breda Netherlands New Materials and Their Applications Centre of Expertise Safe & Resilient Society Avans University of Applied Science Breda Netherlands Department of Materials Science and Engineering Delft University of Technology Delft Netherlands

The molecular recyclability of poly (ethylene terephthalate) (PET) and three semi-aromatic polyesters poly (phloretic acid) (poly-H), poly (dihydroferulic acid) (poly-G), and poly (dihydrosinapinic acid) (poly-S) is evaluated in this study. PET is an extensively used aromatic polyester, and poly-H, poly-G, and poly-S can be considered semi-aromatic poly (lactic acid) modifications. All these polyesters have been depolymerized at neutral pH and by acid- and base-catalyzed hydrolysis at two temperatures, i.e., 50˚C and 80˚C. Base-catalyzed depolymerization of virgin PET leads to an isolated yield of 38% after 48 hours of reaction at 80˚C. Contrary to these results for PET, almost all the monomers of the semi-aromatic polyesters poly-H, poly-G, and poly-S are recovered with isolated yields larger than 90% at the same temperature after 15 minutes in a facile manner. A shrinking particle model used to determine the global kinetics of the base-catalyzed depolymerization showed that the rate rises with increasing temperature. Using the shrinking particle model, the intrinsic reaction rate constants were determined. It has been demonstrated that the rate coefficients of the depolymerization of the semi-aromatic polyesters poly-H, poly-G, and poly-S are between 2 and 3 orders of magnitude higher than those for PET.

关键词： Depolymerization Molecular Recycling Poly-H Poly-G Poly-S PET Circular Polymers

SCM Implementation Decisions of Principal-Agent under Asymmetric Information

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Open Journal of Applied Sciences 2019年第4期9卷 159-171页

作者： Lina Wang Stephan Poelmans koen.milis Economy & Management School Hainan Normal University Haikou China Management School Liaoning University of Technology Jinzhou China Faculty of Economics and Management Hogeschool-Universiteit Brussel KULeuven Association Brussel Belgium Education Management Industry Campus Vesta Brussels Belgium

The optimization investment policy decision of SCM-Supply Chain Management-implementation has been analysed under symmetric and asymmetric information conditions. For both conditions, SCM implementation options’ decision optimizing models have been developed. In these models, both clients and vendors try to pursue their own benefits. Based upon the principal-agent theory, the models show to what extent a principal (a client) needs to pay more to an agent (a vendor) in a context of asymmetric information. For the client, it is important to understand the extra costs to be able to adopt effective strategies to stimulate a vendor to perform an optimal implementation of a SCM system. The results of a simulation experiment regarding SCM implementation options illustrate and verify the theoretical findings and confirm the general notion that the less informed party is obliged to pay information rent to the better-informed party.

关键词： SCM Implementation Problems Asymmetric Information Implementation Control Cost Evaluation Level Principal-Agent Theory

Solid State Structure and Lyotropic Mesomorphism of Rare-Earth Trisdode cylsulphates in the Water-Ethylene Glycol System

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Journal of Rare Earths 2003年第2期21卷 101-104页

作者： Liesbet Jongen koen Binnemans KatholiekeUniversiteitLeuven KatholiekeUniversiteitLeuven DepartmentofChemistryCelestijnenlaan200FB3001LeuvenBelgiumDepartmentofChemistryCelestijnenlaan200FB3001LeuvenBelgium

The phase behaviour of lanthanide(Ⅲ) dodecylsulphates, Ln(C 12 H 25 SO 4) 3, by thermo optical microscopy using Lawrence penetration technique was investigated. The lyotropic phase behaviour of lanthanide(Ⅲ) dodecylsulphates in ethylene glycol water in mixtures hereof, depends on the composition of the solvent. For pure ethylene glycol and mixtures of ethylene glycol and water three different mesophases are formed, i.e. a lamellar, a cubic and a hexagonal phase, whereas when water is used as solvent no cubic phase is formed. The size of the lanthanide ion has no influence on the mesomorphism of these metallomesogens, although the smaller the lanthanide ion the lower the solubility.

关键词： inorgamic chemistry lanthanides liquid crystals lyotropic mesophases metallomesogens surfactants rare earths