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Ethyl and butyl acetate oxidation over manganese oxides

Chinese Journal of Catalysis 2018年第1期39卷 27-36页

作者： olívia Salomé G.P.Soares Raquel P.Rocha Jose J.M.Orfao Manuel F.R.Pereira José l.Figueiredo laboratory of Separation and Reaction Engineering‐laboratory of Catalysis and Materials (lSRE‐lCM) Faculty of Engineering University of Porto Rua Dr. Roberto Frias s/n 4200‐465 Porto Portugal

Mangenese oxides were synthesized using two new methods,a novel solvent‐free reaction and a reflux technique,that produced cryptomelane‐type products(K‐OMS‐2).Oxides were also synthesized using conventional methods and all specimens were applied to the oxidation of ethyl acetate and butyl acetate,acting as models for the volatile organic compounds found in industrial *** catalysts were also characterized using N2adsorption,X‐ray diffraction,scanning electron microscopy,temperature programmed reduction and X‐ray photoelectron *** of the manganese oxides was found to be very active during the oxidation of both esters to CO2,and the synthesis methodology evidently had a significant impact on catalytic *** K‐OMS‐2nanorods synthesized by the solvent‐free method showed higher activity than K‐OMS‐2materials prepared by the reflux technique,and samples with cryptomelane were more active than those prepared by the conventional *** catalyst with the highest performance also exhibited good stability and allowed90%conversion of ethyl and butyl acetate to CO2at213and202°C,*** differences in the catalyst performance were observed,clearly indicating that K‐OMS‐2nanorods prepared by the solvent‐free reaction were better catalysts for the selected VOC oxidations than the mixtures of manganese oxides traditionally obtained with conventional synthesis *** superior performance of the K‐OMS‐2catalysts might be related to the increased average oxidation state of the manganese in these *** correlations between the catalytic performance and the surface chemical properties were also identified,hig-hlighting the K‐OMS‐2properties associated with the enhanced catalytic performance of the materials.?2018,Dalian Institute of Chemical Physics,Chinese Academy of *** by Elsevier *** rights reserved.

关键词： Volatile organic compound Ethyl acetate Butyl acetate Manganese oxide Catalytic oxidation

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Discrepancies between clinical and autopsy findings in patients who had an acute stroke

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Stroke & Vascular Neurology 2022年第3期7卷 215-221页

作者： lilla Hudák Attila Csaba Nagy Sarolta Molnár Gábor Méhes Katalin Erzsébet Nagy lászlóoláh lászlóCsiba Department of Neurology University of Debrecen Faculty of MedicineDebrecenHungary Department of Preventive Medicine University of Debrecen Faculty of Public HealthDebrecenHungary Department of Pathology University of Debrecen Clinical CenterDebrecenHungary Doctoral School of Neuroscience University of Debrecen Faculty of MedicineDebrecenHungary

Objectives According to international observations,the incidence of clinical autopsies is declining worldwide,plummeting below 5%in the USA and many European *** is an unfavourable trend as,in 7%-12%of cases,recent clinicopathological studies found discrepancies that might have changed the therapy or the outcome if known *** previous large-scale observations have examined varied patient populations,we aimed to focus on the differences between the clinical and pathological diagnostic findings in only patients who had a *** and methods We assessed the postmortem non-neuropathological and neuropathological findings of 534 consecutive patients who had a stroke who passed *** neoplasms,pneumonias,thromboembolisms and haemorrhagic transformations revealed only by autopsy were considered severe abnormalities;in addition,benign abnormalities important from an educational or scientific point of view were also *** In 26 of the 534 cases(4.9%),the presence of systemic neoplasms had already been confirmed in the clinical stage;however,8(1.5%)malignant tumours were only detected during ***,80(15%)thromboembolic events,73(13.6%)pneumonias and 66(18%)haemorrhagic transformations were only diagnosed at *** hospital stay(from admission to death)resulted in fewer discrepancies between clinical and autopsy diagnosis of thromboembolic events and pneumonias(ple the type of acute stroke is reliably diagnosed with imaging techniques,postmortem autopsies are also important in patients who had a stroke as autopsies may reveal clinically silent diseases(eg,tumour),and contribute to knowing the actual incidence of stroke-related thromboembolic and pneumonia complications.

关键词： neoplasms clinical finding

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Rilmenidine prevents blood pressure increase in rats with compromised nitric oxide production

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Acta Pharmacologica Sinica 2004年第12期25卷 74-80页

作者： Mria GEROV,Jozef TRK,ol’ga PECHV,Jana MATUKOV Institute ofNormal and Pathological Physiology SlovakAcademy of Sciences 813 71 Bratislava Slovak Republic Institute ofNormal and Pathological Physiology SlovakAcademy of Sciences 813 71 Bratislava Slovak Republic Institute ofNormal and Pathological Physiology SlovakAcademy of Sciences 813 71 Bratislava Slovak Republic Institute of Pathophysiology Medical School Comenius University Bratislava Slovak Republic Now in Center for Blood Research and Department of Pathology Harvard MedicalSchool Boston USA.

AIM: To search tools of high blood pressure in the model of nitric oxide (NO)-defective hypertension, and the study focused on the effect of rilmenidine, agonist of imidazoline receptors, which was suggested to modulate central sympathetic outflow. METHODS: Three experimental groups, each consisting of 7 rats, were used: (I) rats with inhibition of NO synthase (NOS) by NG-nitro-l-arginine methyl ester (l-NAME) 40 mg·kg-1·d-1 for 4 weeks in drinking water, (II) rats with inhibited NOS as in group I , plus agonist of imidazoline receptors rilmenidine 3 mg·kg-1·d-1 for 4weeks by gavage, and(III) control rats. Systolic blood pressure wasmeasured weekly noninvasively. At the end of experiment aortic ring isometric tension was followed, NOS expression (aorta, left ventricle), and NOS activity (left ventricle and brain) were determined. RESUlTS: In the group I systolic blood pressure in- creased significantly, aortic ring relaxation to acetylcholine was significantly attenuated. Rilmenidine administered simultaneously with l-NAME (group II) prevented the increase of blood pressure which did not differ significantly from control values; aortic ring relaxation to acetylcholine did not differ from control. No change in NOS expres- sion (aorta and left ventricle) was found in groups I and II. Significant decline in NOS activity (left ventricle and brain) wasfound in groups I and II. CONClUSION: Rilmenidinehas aremarkable role inNO-defective hypertension, possibly by inhibiting central sympathetic outflow and by affecting receptors in vascular smooth muscle also. The prime cause of hypertension in this experimental model - the compromised production of NO due to inhibition of NOS - was not affected by rilmenidine.

关键词： NO deficiency hypertension imidazoline receptor nitric-oxide synthase sympathetic activity

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Nickel-carbonate nanowire array： An efficient and durable electrocatalyst for water oxidation under nearly neutral conditions

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Frontiers of Chemical Science and Engineering 2018年第3期12卷 467-472页

作者： Yuyao ji Min Ma Xuqiang ji Xiaoli Xiong Xuping Sun College of Chemistry and Materials Science Sichuan Normal University Chengdu 610068 China College of Chemistry Sichuan University Chengdu 610064 China Key lab of Process Analysis and Cont ol of Sichuan Universities Yibin University Yibin 644000 China

It is highly attractive but still remains a great challenge to develop an efficient electrocatalyst for oxygen evolution reaction under nearly neutral conditions. In this work, we report the transformation of Ni3S2 nanowire array on nickel foam into the amorphous nickel carbonate nanowire array on nickel foam （NiCO3/NF）. The resulting NiCO3/NF shows high electrocatalytic activity towards water oxidation and affords current density of 50 mA. cm-2 at overpotential of 395 mV in 1.0 mol·l^-1 KHCO3. Moreover, this NiCO3/NF is also durable with a long-term electrochemical durability of 60 h. This catalyst electrode achieves a high turnover frequency of 0.21 mol O2·s^-1 at the overpotential of 500 mV.

关键词： water oxidation NiCO3/NF nearly neutral conditions superior activity electocatalyst

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Development of a multiprimer metabarcoding approach to understanding trophic interactions in agroecosystems

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Insect Science 2022年第4期29卷 1195-1210页

作者： Ivan Batuecas Oscar Alomar Cristina Castañe Josep Piñol Stéphane Boyer lorena Gallardo-Montoya Nuria Agustí IRTA Sustainable Plant ProtectionCabrilsBarcelonaSpain Universitat Autònoma Barcelona Cerdanyola del VallèsSpain CREAF Cerdanyola del VallèsSpain Institut de Recherche sur la Biologie de l'Insecte(IRBI) Tours UniversityToursFrance

To understand trophic interactions and the precise ecological role of each predatory species,it is important to know which arthropod and plant resources are used by generalist predators in *** approaches,such as the use of high-throughput sequencing(HTS),play a key role in identifying these *** study develops a multiprimer metabarcoding approach for screening the most common trophic interactions of two predatory arthropods with contrasting morphologies,Rhagonycha fulva(Coleoptera:Cantharidae)and Anthocoris nemoralis(Hemiptera:Anthocoridae)collected from a peach *** reduce the time and cost of this metabarcoding approach,we first evaluated the effect of using two different predator-pools of different size(10 and 23 individuals of the same species).We also used our system to analyze the performance of one and two primer pairs in the same *** results show that the analysis of 23 individuals together with the use of two primer pairs in the same library optimize the HTS *** these best-performing conditions,we then analyzed the entire bodies of field-collected predators as well as the washing solutions used to clean the insect *** were able to identify both gut content(i.e.,diet)and external pollen load(i.e.,on the insects’bodies).This study also demonstrates the importance of washing predatory insects’bodies prior to HTS analysis when the target species have a considerable size(>10 mm)and hairy *** metabarcoding approach has significant potential for the study of trophic links in agriculture,revealing expected and unexpected trophic relationships.

关键词： high-throug hput sequencing metabarcoding molecular diet analysis multiprimer approach predatory arthropods trophic interactions

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手性磷酸不对称催化合成四氢吡喃杂环化合物

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当代化工研究 2024年第12期 172-174页

作者：纪凤婷彭林邵阳学院食品与化学工程学院湖南422000

四氢吡喃环结构广泛存在于天然活性物质中。四氢吡喃环类化合物及其衍生物有良好的降糖、抗菌、抗炎、抗肿瘤等药理学活性。本文以4-戊炔-1-醇为起始原料,经烷基化、Dess-Martin氧化、Witting反应、脱保护基、Diels-Alder反应等利用手... 详细信息

四氢吡喃环结构广泛存在于天然活性物质中。四氢吡喃环类化合物及其衍生物有良好的降糖、抗菌、抗炎、抗肿瘤等药理学活性。本文以4-戊炔-1-醇为起始原料,经烷基化、Dess-Martin氧化、Witting反应、脱保护基、Diels-Alder反应等利用手性磷酸催化剂不对称催化合成含有四氢吡喃环单元的六元骈六元环化合物,并且产物有良好的对映选择性(93%ee)。

关键词：手性磷酸催化四氢吡喃环不对称催化含氧杂环化合物

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Microbiomics and metabolomics insights into the microbial regulation on the formation of flavor components in the traditional fermentation process of Chinese Hongqu aged vinegar

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Food Science and Human Wellness 2024年第5期13卷 2765-2778页

作者： Shangong Tong Wenlong li Yuandong Rao Yanqin Xiao Yingyin Yan Weiling Guo Xucong lü jinyuan Sun lianzhong Ai li Ni Institute of Food Science and Technology College of Biological Science and EngineeringFuzhou UniversityFuzhou 350108China Food Nutrition and Health Research Center School of Advanced ManufacturingFuzhou UniversityJinjiang 362200China School of Food Science and Technology Jiangnan UniversityWuxi 214122China Beijing laboratory for Food Quality and Safety Beijing Technology and Business UniversityBeijing 100048China School of Health Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China

This study aimed to investigate microbial succession and metabolic dynamics during the traditional fermentation of Hongqu aged vinegar,and explore the core functional microbes closely related to the formation of flavor *** analysis demonstrated that lactobacillus,Acetobacter,Bacillus,Enterobacter,lactococcus,leuconostoc and Weissella were the predominant bacterial genera,while Aspergillus piperis,Aspergillus oryzae,Monascus purpureus,Candida athensensis,***,Penicillium ochrosalmoneum and Simplicillium aogashimaense were the predominant fungal *** analysis revealed that Acetobacter was positively correlated with the production of tetramethylpyrazine,acetoin and acetic acid,lactococcus showed positive correlation with the production of 2-nonanone,2-heptanone,ethyl caprylate,ethyl caprate,1-hexanol,1-octanol and 1-octen-3-ol,*** and *** were positively associated with the production of diethyl malonate,2,3-butanediyl diacetate,acetoin,benzaldehyde and ***,non-volatile metabolites were also detected through ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry.A variety of amino acids and functional dipeptides were identified during the traditional brewing of Hongqu aged *** analysis revealed that lactobacillus was significantly associated with Dl-lactate,indolelactic acid,D-(+)-3-phenyllactic acid,pimelic acid,pregabalin and 3-aminobutanoic *** study is useful for understanding flavor formation mechanism and developing effective strategies for the suitable strains selection to improve the flavor quality of Hongqu aged vinegar.

关键词： Hongqu aged vinegar Traditional fermentation Microbial dynamics Flavor components Bidirectional orthogonal partial least squares

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Anti-inflammatory and antinociceptive activities of Rhipicephalus microplus saliva

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Asian Pacific Journal of Tropical Biomedicine 2018年第4期8卷 194-200页

作者： DF.Buccini AA.Nunes GGO.Silva ON.Silva ol.Franco SE.Moreno Programa de Pos-Graduacao em Biotecnologia e Biodiversidade Universidade Federal do Mato Grosso do Sul S-Inova Biotech Programa de Pos-Graduacao em Biotecnologia Universidade Catolica Dom Bosco Programa de Pos-Graduacao em Patologia Molecular Universidade de Brasilia Centro de Analises Proteomicas e Bioquimicas Programa de Pos-Graduacao em Ciencias Genomicas e Biotecnologia Universidade Catolica de Brasilia

To evaluate the antinociceptive and anti-inflammatory activities and the toxic effects of Rlhipicephalus microplus saliva for elucidating the modulation mechanism between arthropod saliva and ***:For saliva collection,engorged ticks were obtained from a controlled bovine infestation and collected by natural *** ticks were fixed and injected pilocarpine 0.2%for induction of *** was collected,lyophilized and stored at-80℃.Cytotoxic activity was assessed by the hemolysis method(25,50,100,200 and 300μg/ml)and MTT cell viability assay(2.5,5,10,20 and 40μg/ml)for 24,48 and 72 ***-inflammatory activity was evaluated using the method of neutrophil migration to the peritoneal cavity of mice at doses of l0,15 and 20 mg/kg;antinociceptive activity was assessed using the acetic acid-induced writhing test,and formalin-induced paw-licking in mice at dose of 15 mg/***:Saliva did not cause erythrocytes hemolysis at any concentration tested,as well as did not decrease cell viability in the MTT *** inhibited neutrophil migration by 87%and 73%at doses of l5 and 20 mg/kg,*** the nociceptive tests,saliva presented analgesic activity of69.96%in the abdominal writhing test,and of 84.41%in the formalin *** study proves that Rlhipiceplhalus microplus saliva has significant in vivo anti-inflammatory and antinociceptive *** data presented herein support the development of further studies to elucidate the active principles of Rhipicephalus microplus saliva and its mechanism of action and,in future,to develop novel anti-inflammatory and analgesic drugs.

关键词： Rhipicephalus microplus Saliva Tick Antinociceptive Anti-inflammatory

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乙醇萃取对大豆分离蛋白风味影响研究

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农产品加工 2024年第3期 9-14页

作者：李晓敏季国志董阳内蒙古蒙牛乳业(集团)股份有限公司内蒙古呼和浩特011500

为提高大豆分离蛋白利用率,降低大豆分离蛋白特征风味,利用乙醇对大豆分离蛋白进行风味萃取,通过顶空固相微萃取及气相色谱-质谱联用技术分析挥发性风味物质的含量变化。结果表明,影响大豆分离蛋白风味的主要挥发性物质(按照对风味贡献... 详细信息

为提高大豆分离蛋白利用率,降低大豆分离蛋白特征风味,利用乙醇对大豆分离蛋白进行风味萃取,通过顶空固相微萃取及气相色谱-质谱联用技术分析挥发性风味物质的含量变化。结果表明,影响大豆分离蛋白风味的主要挥发性物质(按照对风味贡献大小依次排序)有非豆腥味成分(葵醛、壬醛、辛醛、十一醛、戊醛)和豆腥味成分(2,4-癸二烯醛、2-戊基呋喃、反式-2-壬烯醛、己醛、1-辛烯-3-醇、反式-2-辛烯醛、反式-2-庚烯醛)。经乙醇萃取处理后,非豆腥味成分葵醛、壬醛、辛醛、十一醛、戊醛含量分别降低45%,43%,59%,52%,94%,其中戊醛去除效果最显著且其含量降低至香气阈值以下;豆腥味成分中2,4-癸二烯醛、2-戊基呋喃、己醛对大豆分离蛋白风味影响较大,含量分别降低了82%,78%,71%。1-辛烯-3-醇、反式-2-辛烯醛、反式-2-庚烯醛含量分别降低93%,52%,57%,其中1-辛烯-3-醇去除效果最显著,且其含量降低至接近香气阈值,乙醇处理对反式-2-壬烯醛没有去除效果。对采用经乙醇萃取处理后大豆分离蛋白制备的豆奶感官分析结果显示,豆腥味、油味、生谷物味等特征风味较未处理组明显减弱。综合分析,乙醇处理能明显减弱大豆分离蛋白特征风味,尤其对豆腥味物质的去除效果更好。

关键词：大豆分离蛋白乙醇萃取豆腥味非豆腥味

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ARTP和NTG诱变选育的解脂耶氏酵母对酸肉风味的影响

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中国食品学报 2024年第5期24卷 190-201页

作者：郭冰蕊蒋翠翠张素芳梁会朋纪超凡陈映羲董亮林心萍大连工业大学食品学院国家海洋食品工程技术研究中心辽宁大连116034 华润雪花啤酒(中国)有限公司北京100000

采用常压室温等离子体(ARTP)和亚硝基胍(NTG)诱变技术处理解脂耶氏酵母C11,研究诱变前、后菌株的酶学性质。最终筛选出4株突变菌A6、A13、A14、N12,酶活分别为1.007,1.554,1.139,1.021 U/ml,是起始菌株的1.41,2.17,1.59,1.43倍。4株突... 详细信息

采用常压室温等离子体(ARTP)和亚硝基胍(NTG)诱变技术处理解脂耶氏酵母C11,研究诱变前、后菌株的酶学性质。最终筛选出4株突变菌A6、A13、A14、N12,酶活分别为1.007,1.554,1.139,1.021 U/ml,是起始菌株的1.41,2.17,1.59,1.43倍。4株突变株的最适温度为50℃、最适pH值为8.0。乙醇对脂肪酶酶活有抑制作用,最适底物由C8酯变化为C4酯。将A13、N12接种到酸肉发酵中,采用固相微萃取结合气相色谱-质谱法测定样品中挥发性物质,结果表明接种突变株能很好地改善酸肉的感官品质,促进酯类、醛类、醇类等挥发性风味物质的产生,显著提高丁酸乙酯、己酸乙酯、辛酸乙酯、癸酸乙酯、庚醛、壬醛、(E,E)-2,4-癸二烯醛和1-辛烯-3-醇的气味活性值(OAV),赋予酸肉玫瑰香味、蘑菇味、焦香味、水果味等风味。

关键词：脂肪酶解脂耶氏酵母常压室温等离子体亚硝基胍诱变酸肉挥发性风味物质

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