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Ethanolic extract of rice bran: a thermally stable preservative for edible oils and cake

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Food Production, Processing and Nutrition 2022年第1期4卷 183-193页

作者： Kaveesha P.Seneviratne N.V.PAnjali Chathuri M.Senanayake Nimanthi Jayathilaka Kapila N.Seneviratne Department of Chemistry Faculty of ScienceUniversity of KelaniyaKelaniyaSri Lanka present address:Department of Biosystems Technology Faculty of TechnologyUniversity of Sri JayewardenepuraNugegodaSri Lanka

The purpose of this study was to evaluate the thermal stability of the rice bran extract (RBE) and analyze the effect of RBE on the shelf-life of sunflower oil and the quality characteristics and shelf-life of baked cake. The thermal stability of RBE was evaluated by a Rancimat test using sunflower oil. Properties such as moisture content, porosity, crumb density and pore area of cakes baked with RBE and the synthetic antioxidant butylated hydroxytoluene (BHT) were compared. Sensory properties such as taste, aroma, texture, color and overall acceptability of the cake samples were compared using a sensory panel test. The shelf-life of the cakes was evaluated by microbial counts and chemical methods. Thermally treated RBE and BHT for 2 h at 180 °C retained 75% of their initial capacity in protecting sunflower oil while RBE had a significantly higher protection factor (p < 0.05). Cakes baked with RBE received higher scores for taste, color and overall acceptability compared to control or BHT-added cake. BHT-added cake and RBE-added cake exceeded the aerobic plate count (APC) and yeast and mold count (YMC) on days 11 and 13 respectively, while the control cakes without added antioxidants exceeded the APC and YMC on day 7. Both BHT- and RBE-added cakes maintained hexanal levels below 5 mg/kg over 28 days while the control cake exceeded this level on day 21. The results suggest that RBE can be used as a natural food additive to improve the quality and shelf-life of baked foods and edible oils.

关键词： Phenolic antioxidants Food preservatives Sensory properties Shelf-life Rice bran Baked cake Sunflower oil

Rapidly and mildly transferring anatase phase of graphene-activated TiO2 to rutile with elevated Schottky barrier:Facilitating interfacial hot electron injection for Vis-NIR driven photocatalysis

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Nano Research 2022年第12期15卷 10142-10147页

作者： Weiyao Hu Qiyuan Li Dong Xu Guangyao Zhai Shinan Zhang Dong Li Xiaoxiao He Jinping Jia Jiesheng Chen Xinhao Li School of Chemistry and Chemical Engineering Environmental Science and Engineeringand Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai200240China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai200241China

Visible and even infrared(IR)light-initiated hot electrons of graphene(Gr)catalysts are a promising driven power for green,safe,and sustainable H2O2 synthesis and organic synthesis without the limitation of bandgap-dominated narrow light absorption to visible light confronted by conventional ***,the life time of photogenerated hot electrons is too short to be efficiently used for various photocatalytic ***,we proposed a straightforward method to prolong the lifetime of photogenerated hot electrons from graphene by tuning the Schottky barrier at Gr/rutile interface to facilitate the hot electron *** rational design of Gr-coated TiO2 heterojunctions with interface synergy-induced decrease in the formation energy of the rutile phase makes the phase transfer of TiO2 support proceed smoothly and rapidly via ball *** optimized Gr/rutile dyad could provide a H2O2 yield of 1.05 mM·g-1·h-1 under visible light irradiation(λ≥400 nm),which is 30 times of the state-of-the-art noble-metal-free titanium oxide-based photocatalyst,and even achieves a H2O2 yield of 0.39 mM·g-1·h-1 on photoexcitation by near-infrared-region light(~800 nm).

关键词： hot electrons phase transition Schottky barrier heterojunction catalyst visible-near infrared ray(Vis-NIR)driven photocatalysis

Fertilizer and soil conditioner value of broiler manure biochars

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Biochar 2019年第3期1卷 259-270页

作者： Riikka Keskinen Jari Hyvaluoma Lauri Sohlo Hanna Help Kimmo Rasa Natural Resources Institute Finland(Luke) Tietotie 431600 JokioinenFinland present address:Hame University of Applied sciences Mustialantie 10531310 MustialaFinland present address:Pellon Group Oy Yrittajantie 1062375 YliharmaFinland Department of Physics Faculty of ScienceUniversity of Helsinki00014 HelsinkiFinland

Pyrolysis is an option for enhancing the sustainable management of broiler manure surpluses by producing a concentrated,hygienic char product with a fertilizer and soil conditioner *** this study,the impacts of pyrolysis conducted at 350,400 and 450℃ on total nutrient and harmful element concentrations in biochars derived from peat-bedded broiler manure were *** was placed on the availability of phosphorus(P).In addition,the pore structures of these biochars were explored using X-ray microtomography and image *** pyrolysis,35-50%,40-55%and 35-45%of the original carbon,nitrogen and sulfur contents,respectively,of the feedstock biomass were lost as *** elements,including P,were concentrated in the *** water-extractable P was found to be converted to less labile forms due to charring,the concentration effect and notable increase in sodium bicarbonate-extractable P rendered broiler manure biochars richer in total labile P in comparison with feedstock manure(7.1,10.0,11.1 and 14.8 g labile P kg^(−1)in feedstock and biochars produced at 350,400 and 450℃,respectively).The pore volume of the micrometer-scale porosity of the broiler manure biochar was comparable to that found earlier in wood-based *** comparison with wood-based biochars,the pore structure of broiler manure biochars was more versatile,and the pore size distribution was ***,part of the porosity was too large to store plant-available water,which may reduce the potential of broiler manure biochars to improve soil water storage capacity.

关键词： Poultry manure Pyrolysis Soil amendment Pore structure Phosphorus availability

Mechanically robust and dynamic supramolecular polymer networks enabled by[an]daisy chain backbones

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science China Chemistry 2024年第12期67卷 4234-4241页

作者： Yongming Wang Yi Ding Yuhang Liu Shaolei Qu Wenbin Wang Wei Yu Zhaoming Zhang Feng Liu Xuzhou Yan School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory for Mechanical Behavior of Materials Shaanxi International Research Center for Soft MatterSchool of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China

Supramolecular polymer networks(SPNs)have garnered significant research interest due to their dynamic ***,while current developments primarily focus on managing supramolecular crosslinks,the role of polymer backbones—equally crucial to SPN properties—has not yet been sufficiently ***,we utilize mechanically interlocked[an]daisy chain as backbone to prepare a class of SPNs,where the force-induced motion of successive mechanical bonds toughens and reinforces the *** specific,the[an]daisy chain backbones connect with polynorbornene chains through quadruple H-bonding in the SPN *** to the control with non-slidable backbone,The representative SPN-2 exhibits a robust feature in tensile tests with high maximum stress(14.7 vs.7.89 MPa)and toughness(83.8 vs.48.6 MJ/m^(3)).Moreover,it also has superior performance in energy dissipation benefitting from the[an]daisy chain backbones as well as supramolecular ***,the SPN-2 displayed exceptional self-healing and reprocessing capabilities due to their dynamic quadrable H-bonding *** findings demonstrate the untapped potential of[an]daisy chain as a polymer skeleton to develop SPNs and open the door to design mechanically robust supramolecular materials with diverse smart functions.

关键词： supramolecular polymer networks mechanical bond [an]daisy chains self-healing dynamic materials

Phase Diffusion in Single-Walled Carbon Nanotube Josephson Transistors

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Nano Research 2008年第2期1卷 145-151页

作者： Yong Zhang Gang Liu Chun Ning Lau Department of Physics&Astronomy University of CaliforniaRiversideCA 92521USA present address:School of Physical science&Technology Southwest UniversityChongqing 400715China

We investigate electronic transport in Josephson junctions formed by individual single-walled carbon nanotubes coupled to superconducting *** observe enhanced zero-bias conductance(up to 10e2/h)and pronounced sub-harmonic gap structures in differential conductance,which arise from the multiple Andreev refl ections at superconductor/nanotube *** voltage-current characteristics of these junctions display abrupt switching from the supercurrent branch to the resistive branch,with a gate-tunable switching current ranging from 65 pA to 2.5 *** fi nite resistance observed on the supercurrent branch and the magnitude of the switching current are in good agreement with the classical phase diffusion model for resistively and capacitively shunted junctions.

关键词： Carbon nanotubes Josephson junctions quantum dot electrical transport supercurrent

Laser assisted phase transformation of carbon-based transition metal oxide electrode for high-performance supercapacitor application

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science China Chemistry 2025年

作者： Mingzhen Xiu Jianghong Zhang Yu Lu Xun Cao Kang Huang Siyu Zhu Bowei Zhang Yu Liang Chunwang Zhao Junsheng Wu Yizhong Huang School of Materials science and Engineering Nanyang Technological University Energy Research Institute Interdisciplinary Graduate Programme Nanyang Technological University Institute of Sustainability for Chemicals Energy and Environment Agency for Science Technology and ResearchSingapore Institute of Advanced Materials and Technology University of Science and Technology Beijing School of Materials science and Technology Shenyang University of Chemical Technology School of Materials science and Hydrogen Energy Foshan University

Transitional metal oxides have a wide range of applications due to their superior *** enhanced performance of metal oxide relies on their desirable oxidation states,which is challenging to achieve and requires complex *** study demonstrates a facile strategy enabling rapid phase transformation of transition metal *** approach involves synthesis of a tetragonal Mn3O4/carbon cloth composite using the liquid plasma discharge deposition （LPDD） technique,followed by laser irradiation with the presence of ethylene glycol under an N2gas *** resulting face-centered cubic MnO/carbon cloth electrode exhibits an excellent capacitance of 1,125 F g-1at 2 A g-1,with remarkable capacitance retention of 95%after10,000 *** approach can be extended to other transition metals including Co,Cu,Cr,Fe,Ni,and *** simulations reveal the significance of ethylene glycol and the underlying mechanism associated with the phase transformation of transition metal *** present study offers a powerful technique for the phase transformation of transition metal oxide which can guide the development of new electrode materials with enhanced electrochemical properties for high-performance energy storage applications.

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Blocking the Metabolism of Starch Breakdown Products in Arabidopsis Leaves Triggers Chloroplast Degradation

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Molecular Plant 2009年第6期2卷 1233-1246页

作者： Michaela Stettler Simona Eicke Tabea Mettler Gaelle Messerli Stefan Hortensteiner Samuel C. Zeeman Department of Biology ETH Zurich CH-8092 Zurich Switzerland Institute of Plant Biology University of Zurich CH-8008 Zurich Switzerland present address: Max Planck Institute for Molecular Plant Physiology Potsdam-Golm 14476 Germany present address: Johnson & Johnson Medical CH-8957 Spreitenbach Switzerland

In most plants, a large fraction of photo-assimilated carbon is stored in the chloroplasts during the day as starch and remobilized during the subsequent night to support metabolism. Mutations blocking either starch synthesis or starch breakdown in Arabidopsis thaliana reduce plant growth. Maltose is the major product of starch breakdown exported from the chloroplast at night. The maltose excess 1 mutant （mex1）, which lacks the chloroplast envelope maltose transporter, accumulates high levels of maltose and starch in chloroplasts and develops a distinctive but previously unexplained chlorotic phenotype as leaves mature. The introduction of additional mutations that prevent starch synthesis, or that block maltose production from starch, also prevent chlorosis of mex1. In contrast, introduction of mutations in disproportionating enzyme （DPE1） results in the accumulation of maltotriose in addition to maltose, and greatly increases chlorosis. These data suggest a link between maltose accumulation and chloroplast homeostasis. Microscopic analyses show that the mesophyll cells in chlorotic mex1 leaves have fewer than half the number of chloroplasts than wild-type cells. Transmission electron microscopy reveals autophagy-like chloroplast degradation in both mex1 and the dpe1/mex1 double mutant. Microarray analyses reveal substantial reprogramming of metabolic and cellular processes, suggesting that organellar protein turnover is increased in mex1, though leaf senescence and senescence-related chlorophyll catabolism are not induced. We propose that the accumulation of maltose and malto-oligosaccharides causes chloroplast dysfunction, which may by signaled via a form of retrograde signaling and trigger chloroplast degradation.

关键词： Carbohydrate metabolism photosynthesis senescence chloroplast biology Arabidopsis autophagy.

The structure-performance correlation of bulk-heterojunction organic solar cells with multi-length-scale morphology

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science China Chemistry 2022年第8期65卷 1634-1641页

作者： Tianyu Hao Wenkai Zhong Shifeng Leng Rui Zeng Ming Zhang Lei Zhu Yankang Yang Jingnan Song Jinqiu Xu Guanqing Zhou Yecheng Zou Yongming Zhang Feng Liu School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesIn-situ Center for Physical ScienceCenter of Hydrogen ScienceShanghai Key Lab of Electrical Insulation&Thermal AgingShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Fluorinated Functional Membrane Materials Shandong Dongyue Future Hydrogen Energy Materials CompanyZibo 256401China

We build a general multi-length-scale morphology model with mixing phase and pure phase fibril structure,and simulate corresponding organic solar cells *** multi-length-scale morphology optimization process by changing the proportion of mixing phase and pure phase in different period width cases shows a clear correlation between period width and device performance that a smaller period width with appropriate proportion of mixing phase and fibril structure is advantageous to achieve high-performance *** on multiple donor/acceptor blends have been carried out by varying the composition and processing condition,which afford good structure-performance correlation that supports the model *** is demonstrated that building such a multi-length-scale morphology merging the synergistic effects of mixing and pure phases is indeed an imperative avenue to improve device efficiency.

关键词： multi-length-scale morphology simulations organic photovoltaics morphology-performance relationship

A Combinatorial Approach Based on Nucleic Acid Assembly and Electrostatic Compression for siRNA Delivery

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Chemical Research in Chinese Universities 2021年第4期37卷 906-913页

作者： REN Yiqing LIU Xinlong GE Huan GUO Yuanyuan ZHANG Qiushuang XIE Miao WANG Ping ZHU Xinyuan ZHANG Chuan School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai200240P.R.China Weigao Research center Shanghai201203P.R.China

A combinatorial strategy based on nucleic acid assembly and electrostatic complexation is developed for efficient small interfering ribonucleic acid(siRNA)*** this approach,siRNAs are first loaded into a well-defined nanotube through programmable nucleic acid *** to small rigid siRNA duplex,the obtained siRNA-bearing nanotube with large architecture is more readily to complex with cationic and ionizable poly(β-amino ester),resulting in the formation of a novel platform for efficient siRNA delivery.

关键词： Nucleic acid nanogel Electrostatic compression siRNA delivery Self-assembly