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The Anhydride-Amic Acid-Imide Forms of Maleinized Soybean Oil

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Chinese Journal of Polymer Science 2023年第12期41卷 1829-1835,I0005页

作者： yun Zhou Yan-Bin huang Wan-Tai Yang Department of Chemical Engineering Tsinghua UniversityBeijing 100084China

Vegetable oil is one of the most promising renewable feedstocks as an alternative to fossil resources,but there are few studies aiming to transform it into hydrophilic *** proposed a facile method to prepare water-soluble derivatives from soybean oil,which could become water resistant again after simple heat *** model vegetable oil,soybean oil(SO),was first reacted with maleic anhydride(MA)by the Alder ene reaction to obtain maleinized soybean oil(SOMA),and SOMA was further reacted with gaseous ammonia to obtain the maleamic acid form(SOMA-Amic acid),which was very soluble in water(solubility>100 mg/mL).The obtained water-soluble product was converted to the water-resistant maleimide form(SOMA-Imide)by a simple heat *** potential application of these vegetable oil derived materials was demonstrated in paper sizing as an ***-Amic acid was demonstrated to be a novel green material,which can be used in an aqueous process and then heat-treated to become water-resistant in the final product.

关键词： Soybean oil Anhydride-amic acid-imide forms Maleinization

Sorption mechanism of naphthalene by diesel soot: Insight from displacement with phenanthrene/p-nitrophenol

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Journal of Environmental Sciences 2021年第8期33卷 136-146页

作者： Wenhao Wu yun huang Daohui Lin Kun Yang Department of Environmental Science Zhejiang UniversityHangzhou 310058China Key Laboratory of Environmental Pollution and Ecological Health of Ministry of Education Hangzhou 310058China Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Hangzhou 310058China

The nonlinear sorption of hydrophobic organic contaminants(HOCs)could be changed to linear sorption by the suppression of coexisting solutes in natural system,resulting in the enhancement of mobility,bioavailability and risks of HOCs in the *** previous study,inspired from the competitive adsorption on activated carbon(AC),the displaceable fraction of HOCs sorption to soot by competitor was attributed to the adsorption on elemental carbon fraction of soot(EC-Soot),while the linear and nondisplaceable fraction was attributed to the partition in authigenic organic matter of soot(OM-Soot).In this study,however,we observed that the linear and nondisplaceable fraction of HOC(naphthalene)to a diesel soot(D-Soot)by competitor(phenanthrene or p-nitrophenol)should be attributed to not only the linear partition in OM-Soot,but also the residual linear adsorption on *** also observed that the competition on the surface of soot dominated by external surface was different from that of AC dominated by micropore surface,i.e.,complete displacement of HOCs by p-nitrophenol could occur for the micropore surface of AC,but not for the external surface of *** observations were obtained through the separation of EC-Soot and OM-Soot from D-Soot with organic-solvent extraction and the sorption comparisons of D-Soot with an AC(ACF300)and a multiwalled carbon nanotube(MWCNT30).The obtained results would give new insights to the sorption mechanisms of HOCs by soot and help to assess their environmental risks.

关键词： Competitive sorption Diesel soot Organic compounds Linearity External surface

Laser-Induced Graphene:En Route to Smart Sensing

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Nano-Micro Letters 2020年第11期12卷 209-225页

作者： Libei huang Jianjun Su yun Song Ruquan Ye Department of Chemistry City University of Hong KongKowloonHong KongPeople’s Republic of China State Key Lab of Marine Pollution City University of Hong KongKowloonHong KongPeople’s Republic of China

The discovery of laser-induced graphene(LIG) from polymers in 2014 has aroused much attention in recent years.A broad range of applications,including batteries,catalysis,sterilization,and separation,have been *** advantages of LIG technology over conventional graphene synthesis methods are conspicuous,which include designable patterning,environmental friendliness,tunable compositions,and controllable *** addition,LIG possesses high porosity,great flexibility,and mechanical robustness,and excellent electric and thermal *** patternable and printable manufacturing process and the advantageous properties of LIG illuminate a new pathway for developing miniaturized graphene *** use in sensing applications has grown swiftly from a single detection component to an integrated smart detection *** this minireview,we start with the introduction of synthetic efforts related to the fabrication of LIG ***,we highlight the achievement of LIG sensors for the detection of a diversity of stimuli with a focus on the design principle and working *** development of the techniques toward in situ and smart detection of multiple stimuli in widespread applications will be discussed.

关键词： Laser-induced graphene Smart sensor Printable electronics Design principle

On Double Vector Bundles

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Acta Mathematica Sinica,English Series 2014年第10期30卷 1655-1673页

作者： Zhuo CHEN Zhang Ju LIU yun He sheng Department of Mathematics Tsinghua University Department of Mathematics and LMAM Peking University Department of Mathematics Jilin University

In this paper, we construct a category of short exact sequences of vector bundles and prove that it is equivalent to the category of double vector bundles. Moreover, operations on double vector bundles can be transferred to operations on the corresponding short exact sequences. In particular, we study the duality theory of double vector bundles in term of the corresponding short exact sequences. Examples including the jet bundle and the Atiyah algebroid are discussed.

关键词： Double vector bundles DVB sequences duality jet bundles

Isogeometric Analysis with Local Adaptivity for Vibration of Kirchhoff Plate

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Computer Modeling in Engineering & Sciences 2022年第5期131卷 949-978页

作者： Peng Yu Weijing yun Junlei Tang sheng He College of Civil Engineering and Architecture Key Laboratory of Disaster Prevention and Structural Safety of Ministry of EducationGuangxi Key Laboratory of Disaster Prevention and Structural SafetyGuangxi UniversityNanning530000China

Based on our proposed adaptivity strategy for the vibration of Reissner-Mindlin plate,we develop it to apply for the vibration of Kirchhoff *** adaptive algorithm is based on the Geometry-Independent Field approximaTion(GIFT),generalized from Iso-Geometric Analysis(IGA),and it can characterize the geometry of the structure with NURBS(Non-Uniform Rational B-Splines),and independently apply PHT-splines(Polynomial splines over Hierarchical T-meshes)to achieve local refinement in the solution ***(Modal AssuranceCriterion)is improved to locate unique,as well as multiple,modal correspondence between different meshes,in order to deal with error *** adaptivity is carried out by sweeping modes from low to high *** examples showthat a proper choice of the spline space in solution field(with GIFT)can deliver better accuracy than using NURBS solution *** addition,for vibration of heterogeneous Kirchhoff plates,our proposed method indicates that the adaptive local h-refinement achieves a better solution accuracy than the uniform h-refinement.

关键词： Isogeometric analysis local refinement adaptivity vibration kirchhoff plate

An investigation of weed seed banks reveals similar potential weed community diversity among three different farmland types in Anhui Province, China

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Journal of Integrative Agriculture 2019年第4期18卷 927-937页

作者： HE yun-he GAO Ping-lei QIANG sheng Weed Research Laboratory Nanjing Agricultural University School of Landscape Architecture Zhejiang Agricultural & Forestry University

Crop type is one of main factors influencing weed community structure. However, the identity of weed communities associated with the cultivation of different crops in farmlands remains largely unclear. A field survey of weed seed banks was conducted in 2 280 fields at 228 sites of 62 locations representing three different types of farmland(95 paddy, 73 summer-ripe, and 60 autumn-ripe farmlands) along the bank of the Yangtze River in Anhui Province, China. A total of 43 families and 174 species of weeds were found in these weed seed banks. A comparison of the composition of weed groups in the seed banks showed that the species number and density percentage of grass, sedge and broadleaf weed groups were similar among the different types of farmland. The seed banks of all three farmland types shared 71 common weed species, accounting for 40.80% of the total number of species. These common weeds, which were both associated and not associated with crops, accounted for 91.71% of the total dominance degree among all farmland types. The crop-associated weed species were distributed in all soil layers of each farmland type. The Shannon-Wiener index H′(description of species diversity which is more sensitive to dense species) and Pielou's evenness index J(description of species evenness) in summer-ripe farmland were similar to those in autumn-ripe farmland but differed from those in paddy farmland. However, the Simpson's index D(description of species diversity which is more sensitive to sparse species) was similar among all three farmland types. The results of similarity comparison indicated that although the aboveground weed community differed among the different cropping patterns, the weed species composition in the soil seed bank was still similar. Consequently, our results demonstrate that after the implementation of long-term monoculture patterns, weed species compositions in the soil seed bank in different farmlands become homogenized regardless of the crop type.

关键词： species compositi on domi nance degree comm unity similarity comm unity variati on Anhui Province

Crystal structure of kindlin-2 PH domain reveals a conformational transition for its membrane anchoring and regulation of integrin activation

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Protein & Cell 2012年第6期3卷 434-440页

作者： Yan Liu yun Zhu sheng Ye Rongguang Zhang National Laboratory of Biophysics Institute of BiophysicsChinese Academy of SciencesBeijing 100101China

Kindlin-2 belongs to a subfamily of FERM domain con-taining proteins,which plays key roles in activating integrin transmembrane receptors and mediating cell *** to conventional FERM domains,kindlin-2 FERM contains an inserted pleckstrin homology(PH)domain that specifically binds to phosphatidy-linositol(3,4,5)trisphosphate(PIP3)and regulates the kindlin-2 *** have determined the crystal struc-ture of kindlin-2 PH domain at 1.9Åresolution,which reveals a conserved PH domain fold with a highly charged and open binding pocket for PIP3 head *** comparison with a previously reported solution structure of kindlin-2 PH domain bound to PIP3 head group reveals that upon PIP3 insertion,there is a significant conformational change of both the highly positively charged loop at the entry of the PIP3 binding pocket and the entireβbarrel of the PH *** propose that such“induced-fit”type change is crucial for the tight binding of PIP3 to anchor kindlin-2 onto the membrane surface,thereby promoting its binding to *** results provide important structural insight into kindlin-2-mediated membrane anchoring and integrin activation.

关键词： kindlin-2 integrin PH domain crystal structure cell adhesion membrane

Mechanism and microstructure of Eu(Ⅲ) interaction with γ-MnOOH by a combination of batch and high resolution EXAFS investigation

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Science China Chemistry 2013年第11期56卷 1658-1666页

作者： GAO Xing sheng GuoDong huang YuYing Shanghai Synchrotron Radiation Facility (SSRF) Shanghai Institute of Applied PhysicsChinese Academy of Sciences School of Chemistry and Chemical Engineering Shaoxing University

In this paper, the macroscopic interaction method and high resolution EXAFS technique with a bent crystal analyzer were combined to study Eu（III） interaction mechanism and microstructure with y-MnOOH as a function of pH. The results indicated that Eu（III） interaction with y-MnOOH was apparently dependent on pH but independent of ionic strength, suggesting the for- mation of inner-sphere surface complexation for Eu（III） onto y-MnOOH. Results of EXAFS analysis indicated that Eu was surrounded by -9.00 atoms in first coordination shell at REu-O =2.40A, and second shell of Mn atoms at REu-Mn ≈ 3.60 was observed for the three adsorption samples. These findings suggested formation of a bidentate surface complex with Eu（III） bonding by edge sharing to MnO6-octahedron on y-MnOOH surface. Both the macroscopic interaction data and the molecular level evidence of Eu（III） microstructure at the 3,-MnOOH-water interface should be factored into better understanding the fate and mobility of Eu（III） and related radionuclides in the natural soil and water environment.

关键词： high resolution EXAFS technique bent crystal analyzer Eu(III) y-MnOOH interaction mechanism microstructure

Depression among caregivers of patients with dementia:Associative factors and management approaches

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World Journal of Psychiatry 2022年第1期12卷 59-76页

作者： Si-sheng huang Division of Geriatric Psychiatry Department of PsychiatryChanghua Christian HospitalChanghua 500Taiwan

As elderly people increasingly come to represent a higher proportion of the world’s population,various forms of dementia are becoming a significant chronic disease *** World Health Organization emphasizes dementia care as a public health priority and calls for more support for family caregivers who commonly play a significant,central role in dementia *** care of someone with dementia is a long-term responsibility that can be stressful and may lead to depression among family *** and related behavioral and cognitive changes among caregivers could in turn affect the status and prognosis of the dementia *** review article explores depression in dementia caregivers and summarizes proposed mechanisms,associated factors,management and research findings,and proposes future research directions.

关键词： Dementia Depression Caregiver Caregiver burden Activities of daily living Functional status