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Frontiers of Chemical Science and Engineering 2022年第2期16卷 152-167页

作者： Qilei Liu Yinke Jiang Lei Zhang Jian Du institute of Chemical Process Systems Engineering School of Chemical EngineeringDalian University of TechnologyDalian 116024China

Chemical industry is always seeking opportunities to efficiently and economically convert raw materials to commodity chemicals and higher value-added chemicalbased *** life cycles of chemical products involve the procedures of conceptual product designs,experimental investigations,sustainable manufactures through appropriate chemical processes and waste *** these periods,one of the most important keys is the molecular property prediction models associating molecular structures with product *** this paper,a framework combining quantum mechanics and quantitative structure-property relationship is established for fast molecular property predictions,such as activity coefficient,and so *** workflow of framework consists of three *** the first step,a database is created for collections of basic molecular information;in the second step,quantum mechanics-based calculations are performed to predict quantum mechanics-based/derived molecular properties(pseudo experimental data),which are stored in a database and further provided for the developments of quantitative structure-property relationship methods for fast predictions of properties in the third *** whole framework has been carried out within a molecular property prediction *** case studies highlighting different aspects of the toolbox involving the predictions of heats of reaction and solid-liquid phase equilibriums are presented.

关键词： molecular property quantum mechanics quantitative structure-property relationship heat of reaction solid-liquid phase equilibrium

Negative-pressure pneumatic separator:a new solution for hard-coal beneficiation

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International Journal of Coal Science & Technology 2021年第1期8卷 103-123页

作者： Kamil Stańczyk Andrzej Bajerski Marian J.Łączny Central Mining institute Plac Gwarków 140-166KatowicePoland

Hard coal is an important source of energy *** to the imperfections of excavation technology,most run-of-mine coals must be processed before they can be utilised as *** this study,tests on the dry separation process were performed with numerous different raw hard coal and coal waste material samples,using a newly designed and constructed negative-pressure pneumatic separator(NPPS).The experiments revealed the effects of the feed-material properties and material processing *** experiments were preceded by additional tests for evaluating the influence of each device operating parameter on the process,to determine the optimal method of supplying the feed *** calorific value of the processed materials was improved by 5%–40%,while a minimal output yield of products(60%–70%)was *** trials indicated that in coal material processing,the developed NPPS can be used for not only raw coal enrichment but also coal recovery from materials stored at coal-waste *** main advantages of the device are its mobility,low material processing cost,and lack of water consumption during operation.

关键词： Dry coal beneficiation Coal enrichment Coal waste processing Aerodynamic separation Deshaling Negative-pressure system

Characterization of the core microflora and nutrient composition in packaged pasteurized milk products during storage

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Food Science and Human Wellness 2023年第4期12卷 1279-1286页

作者： Ruixue Ding Shanshan Yang Lijuan Geng Yumeng Liu Baoping He Liyun Liu Xiqing Yue Rina Wu Junrui Wu Liaoning Engineering research Center of Food Fermentation Technology Shenyang Key Laboratory of Microbial Fermentation Technology InnovationCollege of Food ScienceShenyang Agricultural UniversityShenyang 110866China Shenyang institute for Food and Drug Control Shenyang 110122China Inner Mongolia Yili Industrial Group Co. Ltd.Hohhot 010080China China Mengniu Dairy Co. Ltd.Hohhot 010000China

Pasteurized milk contains complex microbial communities affected by sterilization and storage *** complex microflora may be the possible reason that pasteurized dairy products are highly prone to *** this study,packaged pasteurized milk products collected from dairy processing factories in China were stored at 0,4,10,15,and 25℃ for 0−15 days and subjected to microbial identification using high-throughput ***,6 phyla and 44 genera were identified as the dominant ***,the changes in nutritional composition of the pasteurized milk,including in 16 free amino acids,7 taste values,and 8 chemical constituents,were analyzed using principal component and multi-factor *** Pearson correlation analysis identified Pseudomonas,Aeromonas,Paenibacillus,and Serratia genera as the core functional microbiota that significantly affects the nutritional composition of pasteurized ***,the results provide a comprehensive understanding of the safety and shelf-life of stored pasteurized milk.

关键词： Pasteurized milk Storage conditions Microbiota High-throughput sequencing(HTS)

樟脑罗勒生物活性提取物对储藏豇豆和大豆中四纹豆象的影响（英文）

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昆虫学报 2017年第12期60卷 1420-1429页

作者： Daniel KOSINI Elias Nchiwan NUKENINE Clément SAIDOU Alembert Tiabou TCHINDA Gabriel Agbor AGBOR School of Health Sciences Catholic University Institute of Saint Jérome Department of Biological Sciences Faculty of ScienceUniversity of Ngaoundere Department of Chemical Engineering and Environment UIT of the University of Ngaoundere Medical research institute and Studies of Medicinal Plants ( IMPM) YaoundéCameroon

【目的】本研究旨在评价樟脑罗勒Ocimum canum Sims(唇形科)叶的正己烷、丙酮和甲醇提取物对四纹豆象Callosobruchus maculatus(F.)的杀虫、保护和驱避潜力。【方法】用剂量为1和5 g/kg豆粒的樟脑罗勒提取物包被处理豇豆和大豆豆粒,并... 详细信息

【目的】本研究旨在评价樟脑罗勒Ocimum canum Sims(唇形科)叶的正己烷、丙酮和甲醇提取物对四纹豆象Callosobruchus maculatus(F.)的杀虫、保护和驱避潜力。【方法】用剂量为1和5 g/kg豆粒的樟脑罗勒提取物包被处理豇豆和大豆豆粒,并以相同剂量的市售苦楝籽油进行包被处理作为参照。7 d内每隔1 d检查处理豆粒中四纹豆象成虫的死亡率。在四纹豆象的各个未成熟期,通过处理新产卵和幼虫,进行杀卵毒性和杀幼虫毒性测试。贮存4个月后评价豆粒受损情况和重量损失。应用线型嗅觉仪,通过选择试验测定驱避效果。【结果】提取物对四纹豆象成虫的毒性与市售苦楝籽油相同,在处理的豇豆中,提取物比市售的苦楝籽油毒性更强。5 g/kg豆粒提取物这一剂量处理7 d内,正己烷、丙酮和甲醇提取物分别引起54.2%±3.9%,62.9%±4.8%和60.3%±4.5%的成虫死亡。此外,与测试的标准杀虫剂相比,提取物激发这两种豆粒产生更强的驱避效果。这一产物对卵的毒性最强,对1和2龄幼虫的毒性比对其他发育阶段豆象的毒性强。正己烷提取物对2龄幼虫的毒性最强(致死率为81.0%±5.3%),而丙酮提取物和甲醇提取物对1龄幼虫的毒性最强,致死率分别为92.5%±7.5%和62.0%±15.7%。丙酮提取物对1和2龄幼虫的毒性与测试的标准杀虫剂相似,对蛹的毒性强于测试的标准杀虫剂。贮存4个月后,豇豆受损和重量损失分别减轻3倍和2倍多。【结论】本研究结果表明,樟脑罗勒提取物对四纹豆象具有潜在的驱避和杀虫活性,由于容易获得,因此强烈建议将该植物用于喀麦隆的害虫治理策略中。

关键词：四纹豆象樟脑罗勒豆类毒性驱避性

A novel algorithm for explicit optimal multi-degree reduction of triangular surfaces

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Science in China(Series F) 2008年第1期51卷 13-24页

作者： HU QianQian WANG GuoJin institute of Computer Images and Graphics State Key Laboratory of CAD & CG Zhejiang UniversityHangzhou 310027 China

This paper introduces the algebraic property of bivariate orthonormal Jacobi polynomials into geometric approximation. Based on the latest results on the transformation formulae between bivariate Bernstein polynomials and Jacobi polynomials, we naturally deduce a novel algorithm for multi-degree reduction of triangular B^zier surfaces. This algorithm possesses four characteristics： ability of error forecast, explicit expression, less time consumption, and best precision. That is, firstly, whether there exists a multi-degree reduced surface within a prescribed tolerance is judged beforehand; secondly, all the operations of multi-degree reduction are just to multiply the column vector generated by sorting the series of the control points of the original surface in lexicographic order by a matrix; thirdly, this matrix can be computed at one time and stored in an array before processing degree reduction; fourthly, the multi-degree reduced surface achieves an optimal approximation in the norm L2. Some numerical experiments are presented to validate the effectiveness of this algorithm, and to show that the algorithm is applicable to information processing of products in CAD system.

关键词： computer aided design data compression triangular Bezier surface multi-degree reduction Bernstein polynomial,Jacobi polynomial L2 norm

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.

Assessment of Microbial Changes and Nutritional Qualities of Extruded White Yam (<i>Dioscorea rotundata</i>) and Bambara Groundnut (<i>Vigna subterranean</i>) Blends

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Food and Nutrition Sciences 2013年第1期4卷 100-107页

作者： O. B. Oluwole S. O. Awonorin F. Henshaw G. N. Elemo O. A. T. Ebuehi Department of Biochemistry University of Lagos Lagos Nigeria. Department of Food Science and Technology Federal University of Agriculture Abeokuta Nigeria Food and Analytical Services Department Federal Institute of Industrial Research Oshodi Nigeria

Two flavoured extruded products were developed by co-extruding yam grits (750 μm) obtained from white yam (Dioscorea rotundata) and bambara groundnut flour (250 μm) in 160:40 respectively obtained from white bambara groundnut with added flavouring agents of salt (1% - 3%) and sugar (4% - 6%) in the feed blends at screw speed of 70 rpm, 17.5%, feed moisture and at the barrel temperature of 145℃. The extruded products were packaged in low density polyethylene bag (0.02 μm gauge size) and stored at room temperature (28℃ ± 2℃) and at refrigeration temperature (9℃ ± 2℃) for a period of twenty weeks. The microbiological changes in the extruded products as determined by the total plate under both storage conditions showed that maximum total plate counts were 0.5 × 104 and 5.4 × 104 cfu/g at 9℃ ± 2℃ and 28℃ ± 2℃ respectively. Nutritional evaluation studies of extrudates were comparable (p ≥ 0.05) with standard casein diet with minimum crude protein content of 13.51% providing 1707.2 KJ energy per 100gof diet and supported weight gain and growth of laboratory animals.

关键词： Co-Extrude Yam Grits Bambara Flour Total Plate Count Nutritional Evaluation Weight Gain Growth

SBOOSP for Massive Devices in 5G WSNs Using Conformable Chaotic Maps

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Computers, Materials & Continua 2022年第6期71卷 4591-4608页

作者： Chandrashekhar Meshram Agbotiname Lucky Imoize Sajjad Shaukat Jamal Amer Aljaedi Adel R.Alharbi Department of Post Graduate Studies and research in Mathematics Jayawanti Haksar Government Post-Graduation CollegeCollege of Chhindwara UniversityBetul460001M.P.India Department of Electrical and Electronics Engineering Faculty of EngineeringUniversity of LagosAkoka100213LagosNigeria Department of Electrical Engineering and Information Technology Institute of Digital CommunicationRuhr University44801BochumGermany Department of Mathematics College of ScienceKing Khalid UniversityAbhaSaudi Arabia College of Computing and Information Technology University of TabukTabuk 71491Saudi Arabia

The commercialization of the fifth-generation(5G)wireless network has *** devices are being integrated into 5G-enabled wireless sensor networks(5GWSNs)to deliver a variety of valuable services to network ***,there are rising fears that 5GWSNs will expose sensitive user data to new security *** secure end-to-end communication,key agreement and user authentication have been ***,when billions of massive devices are networked to collect and analyze complex user data,more stringent security approaches are *** integrity,nonrepudiation,and authentication necessitate special-purpose subtree-based signature mechanisms that are pretty difficult to create in *** address this issue,this work provides an efficient,provably secure,lightweight subtreebased online/offline signature procedure(SBOOSP)and its aggregation(Agg-SBOOSP)for massive devices in 5G WSNs using conformable chaotic *** SBOOSP enables multi-time offline storage access while reducing processing *** a result,the signer can utilize the pre-stored offline information in polynomial *** feature distinguishes our presented SBOOSP from previous online/offline-signing procedures that only allow for one ***,the new procedure supports a secret key during the pre-registration process,but no secret key is necessary during the offline *** suggested SBOOSP is secure in the logic of unforgeability on the chosen message attack in the random ***,SBOOSP and Agg-SBOOSP had the lowest computing costs compared to other contending ***,the suggested SBOOSP outperforms several preliminary security schemes in terms of performance and computational overhead.

关键词： Subtree-based online/offline signature procedure(SBOOSP) 5G WSNs provably secure scheme massive devices conformable chaotic maps

Graphene-based electrodes and catalysts for electroreduction of CO_(2)to low-carbon alcohols

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Materials Reports(Energy) 2023年第2期3卷 142-153,I0004页

作者： Lei Wang Patrick Lira Guangzhi Hu Jianmin Luo Zhao Sun Richard Davis Yudai Huang Sam Toan Department of Chemical Engineering University of Minnesota-DuluthDuluthMN55812USA institute for Ecological research and Pollution Control of Plateau Lakes School of Ecology and Environmental ScienceYunnan UniversityKunming650504China School of Chemistry and Civil Engineering Shaoguan UniversityShaoguan512005China School of Energy Science and Engineering Central South UniversityChangsha410083China State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of ChemistryXinjiang UniversityUrumqi830017China

The electrochemical reduction of CO_(2)(CO_(2)ER)into the renewable and sustainable green fuels,such as low-carbon alcohols,is one of several workable ***_(2)ER can be combined with renewable electricity to transform intermittent energy sources(such as wind,hydro,and solar)into a fuel that can be stored until it is ready to be *** intrinsic characteristics of the employed catalyst have a significant and substantial effect on the efficiency of CO_(2)ER and the ensuing economic *** paradigmatic multicarbon alcohol catalysts should increase the concentration of*CO in the reaction environment,stabilize the key intermediate products during the reaction,and facilitate the C-C coupling *** graphene has a large surface area and exceptional conductivity,it has been used as a support for active phases(nanoparticles or nanosheets).It is possible for graphene to enhance charge transport and accelerate CO_(2)conversion through its electronic and structural coupling *** the interface,a synergy can be produced that improves CO_(2)ER by increasing*CO adsorption,intermediate binding,and *** article focuses on recent advancements in graphene-based catalysts that promote CO_(2)ER to ***,this paper also describes and discusses the key role graphene plays in catalyzing CO_(2)ER into ***,we hope to provide future ideas for the design of graphene-based electrocatalysts.

关键词： Graphene Electrocatalysts CO_(2)reduction Alcohol Electrode