检索结果-南通市图书馆

Enhancement of the CO_(2)adsorption and hydrogenation to CH_(4)capacity of Ru–Na–Ca/γ–Al_(2)O_(3)dual function material by controlling the Ru calcination atmosphere

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2024年第6期140卷 292-305页

作者： Alejandro Bermejo-lópez Beñat pereda-Ayo Jon A.Onrubia-Calvo JoséA.González-Marcos Juan R.González-Velasco Department of Chemical Engineering Faculty of Science and TechnologyUniversidad del País Vasco UPV/EHUBarrio Sarrienas/n48940 LeioaBizkaiaSpain

Integrated CO_(2)capture and utilization(ICCU)technology requires dual functional materials(DFMs)to carry out the process in a single reaction *** influence of the calcination atmosphere on efficiency of 4%Ru-8%Na_(2)CO_(3)-8%CaO/γ-Al_(2)O_(3)DFM is *** adsorbent precursors are first co-impregnated onto alumina and calcined in ***,Ru precursor is impregnated and four aliquotes are subjected to different calcination protocols:static air in muffle or under different mixtures(10%H_(2)/N_(2),50%H_(2)/N_(2)and N_(2))*** are characterized by XRD,N_(2)adsorption-desorption,H_(2)chemisorption,TEM,XpS,H_(2)-TpD,H_(2)-TpR,CO_(2)-TpD and *** catalytic behavior is evaluated,in cycles of CO_(2)adsorption and hydrogenation to CH_(4),and temporal evolution of reactants and products concentrations is *** calcination atmosphere influences the physicochemical properties and,ultimately,activity of *** data and catalytic performance discover the acccomodation of Ru nanoparticles disposition and basic sites is mostly influencing the catalytic *** calcined under N_(2)flow(RuNaCa-N_(2))shows the highest CH_(4)production(449μmol/g at 370℃),because a well-controlled decomposition of precursors which favors the better accomodation of adsorbent and Ru phases,maximizing the specific surface area,the Ru-basic sites interface and the participation of different basic sites in the CO_(2)methanation ***,the calcination in a N_(2)flow is revealed as the optimal calcination protocol to achieve highly efficient DFM for integrated CO_(2)adsorption and hydrogenation applications.

关键词： CO_(2)methanation Integrated CO_(2)capture and utilization(ICCU) Dual functional material(DFM) Ru calcination atmosphere

GO/CNC薄层纳米复合膜的制备及性能研究

在线全文

学校读者我要写书评

暂无评论

中国给水排水 2024年第11期40卷 65-72页

作者：吕永涛杨雅馨吝力潘永宝崔双科王磊西安建筑科技大学环境与市政工程学院陕西西安710055 陕西省膜分离技术研究院陕西省膜分离重点实验室陕西西安710055 陕西省现代建筑设计研究院有限公司陕西西安710021

为改善纳滤膜的性能,利用纤维素纳米晶(CNC)修饰氧化石墨烯(GO),合成了具有良好分散性的GO/CNC复合纳米材料,之后通过界面聚合引入聚酰胺(pa)层中制得改性纳滤膜,并进行形貌结构表征和性能测试。研究发现,GO/CNC改性膜表面具有更明显的... 详细信息

为改善纳滤膜的性能,利用纤维素纳米晶(CNC)修饰氧化石墨烯(GO),合成了具有良好分散性的GO/CNC复合纳米材料,之后通过界面聚合引入聚酰胺(pa)层中制得改性纳滤膜,并进行形貌结构表征和性能测试。研究发现,GO/CNC改性膜表面具有更明显的凸起褶皱结构、更高的粗糙度及亲水性,在0.6 Mpa下纯水通量可达38.45 l(/m2·h),较pa原膜与GO改性膜分别提升了84.86%和53.92%,Na2SO4和NaCl截留率分别为95.47%和6.65%。经pH=4、4000 mg/l的NaClO溶液浸泡4 h后,pa原膜的归一化纯水通量增加了近50%,归一化Na2SO4截留率降至0.89,而GO/CNC改性膜的归一化纯水通量仅增加了13%,Na2SO4截留率几乎无影响。上述结果表明,GO/CNC的添加可显著提升复合纳滤膜的渗透通量,同时具有良好的Na2SO4/NaCl分离选择性与耐氯性能。

关键词：氧化石墨烯纤维素纳米晶纳滤膜界面聚合耐氯性

Accelerated intermetallic phase amorphization in a Mg-based high-entropy alloy powder

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2024年第5期12卷 1792-1798页

作者： prince Sharma purvam Mehulkumar Gandhi Kerri-lee Chintersingh Mirko Schoenitz Edward l.Dreizin Sz-Chian liou Ganesh balasubramanian Institute for Functional Materials&Devices Lehigh UniversityBethlehemPA 18015USA Center of Materials for Advanced Energetics New Jersey Institute of TechnologyNewarkNJ 07102USA

We describe a novel mechanism for the synthesis of a stable high-entropy alloy powder from an otherwise immiscible Mg-Ti rich metallic mixture by employing high-energy mechanical *** presented methodology expedites the synthesis of amorphous alloy powder by strategically injecting entropic disorder through the inclusion of multi-principal elements in the alloy *** from first principles and materials theory corroborate the results from microscopic characterizations that reveal a transition of the amorphous phase from a precursor intermetallic *** transformation,characterized by the emergence of antisite disorder,lattice expansion,and the presence of nanograin boundaries,signifies a departure from the precursor intermetallic ***,this phase transformation is accelerated by the presence of multiple principal elements that induce severe lattice distortion and a higher configurational *** atomic size mismatch of the dissimilar elements present in the alloy produces a stable amorphous phase that resists reverting to an ordered lattice even on annealing.

关键词： High-entropy alloy High-energy milling Antisite disorder Amorphous Intermetallic

Generating oligodendroglia from adult mesenchymal cells for transplantation:cell reprogramming or direct lineage conversion?

在线全文

学校读者我要写书评

暂无评论

neural Regeneration Research 2023年第7期18卷 1493-1494页

作者： Jorge pascual-Guerra JoséA.Rodríguez-Navarro Carlos l.paíno Service of neurobiology-Research Ramón y Cajal University Hospital-IRYCISMadridSpain Department of Cellular Biology Complutense UniversityMadridSpain

Cell replacement therapy has long been proposed as a treatment for the damaged nervous *** of the most challenging aspects of such a strategy,however,is finding sources of donor cells for *** neural cells are rarely an option as every cell in the nervous system has a defined function that would be lost if that cell was to be *** possibility would be sourcing precursor or differentiated cells from fetal tissues;however,aside from ethical issues,heterologous cells are at risk of immunological rejection in the long *** improvements over the past 15 years have led to the possibility that autologous non-neural cells could be used for cell transplantation through their conversion into neural derivatives.

关键词： neural programming removed

Effects of DIMBOA on impulse discharges of maxillary lateral sensillum styloconicum of armyworm larvae

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1997年第1期42卷 72-76页

作者： yang, DM luo, l yan, FM Cheng, HW Zhou, pa BEIJING UNIV COLL LIFE SCIBEIJING 100871PEOPLES R CHINA

THE DIMBOA (2, 4-dihydroxy-7-methoxy-1, 4-benzoxazin-3-one), a secondary product present in corn plants, plays an important role in protecting the plant against the pest attack. DIMBOA is rich in seedlings of cereal crops, especially in maize. Many investigators demonstrated a linear relationship between the DIMBOA content in plant and the resistance of the plant to pest. Feng et al. (1992) summarized that the toxicity of DIMBOA is associated

关键词： armyworm larvae gustatory chemoreceptor lateral sensillum styloconicum DIMBOA.

Assessment of the carbon abatement and removal opportunities of the Arabian Gulf Countries

在线全文

学校读者我要写书评

暂无评论

Clean Energy 2021年第2期5卷 340-353页

作者： Abdulrahman Alatiq wail Aljedani Abdullah Abussaud Omar Algarni Hélène pilorgé Jennifer Wilcox Department of Chemical Engineering Worcester Polytechnic InstituteGoddard Hall100 Institute RoadWorcesterMA 01609USA Department of Chemical and Biomolecular Engineering University of Pennsylvania220 S.33rd StreetPhiladelphiaPA 19104USA

The Arabian Gulf Countries(AGC)are strongly reliant on the economic export of fossil fuels,while being vulnerable to climate change that is resulting in temperature increase,air pollution and sea-level rise,and threatening the health of the population and *** agreement with the paris Accords,most of the AGC have published short-term goals to reduce their carbon emissions in the coming *** relation to these goals,this study explores the potential CO_(2)reduction,avoidance and removal in the region,by comparing a business-as-usual(baU)scenario to three decarbonization scenarios for the power *** 2018,the total greenhouse gas(GHG)emissions in the AGC were~1333 MtCO_(2)/yr and are expected to rise to 1568 MtCO_(2)/yr in 2030 following a baU scenario,which is likely to be reduced to 1522 MtCO_(2)/yr in 2030 by following the countries’*** issued plans for the coming decades that focus on increasing the share of renewable energy in their grid *** three decarbonization scenarios presented in this study focus on supply-side technological *** retirement of the oldest natural-gas and oil power plants could lead to a total emissions reduction of~75 MtCO_(2)/yr,without accounting for the embodied carbon emissions associated with renewable *** addition,the implementation of point-source capture at power plants expected to retire in>10 years’time could avoid emissions of~240 MtCO_(2)/yr,provided the CO_(2)is permanently sequestered in appropriate geological *** region also shows high-quality solar resources and large CO_(2)-storage potential that could couple to direct air-capture plants to offset difficult-to-avoid *** last scenario has the potential to ultimately result in net negative emissions.

关键词： carbon capture CCUS direct air capture

Effects of low molecular weight polysaccharide from sargassum thunbergii against palmitic acid-induced intracellular lipid accumulation in 3T3-l1 adipocyte and HepG2 cells

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年第4期13卷 2244-2252页

作者： Hyo-Geun lee D.p.Nagahawatta M.J.M.S.Kurera Kyung-Mo Song Yun-sang Choi You-Jin Jeon Min-Cheol Kang Department of Marine life Sciences Jeju National UniversityJeju 63243Republic of Korea Department of Biotechnology Faculty of Agriculture and Plantation ManagementWayamba University of Sri LankaMakanduraGonawila(NWP)60170Sri Lanka Research Group of Food processing Korea Food Research Institute245Wanju 55365Republic of Korea

low molecular weight polysaccharides can be isolated from sargassum thunbergii(lMpST)and in vitro experiments were conducted to evaluate the inhibitory effects on *** natures of lMpST were attained from *** and appraised their lMpST on palmitic acid(pa)induced lipid accretion in Hep G2,and 3T3-l1 *** treatment lessened lipid deposition and intracellular free fatty acid and triglyceride intensities in pa-treated above mentioned *** mechanistic study publicized that lMpST2 significantly suppressed adipogenesis and stimulated the pa-treated 3T3-l1 cells occupied in the lipolysis ***,in pa-treated Hep G2 cells,the free fatty acid oxidation was significantly increased by *** these constructive properties of lMpST2 from ***,is a potential candidate for diminishing the intracellular lipids,and for a therapeutic agent in those conditions.

关键词： sargassum thunbergii low molecular weight polysaccharide lipid accumulation Obesity liver steatosis

Antioxidant efficiency of lycopene on oxidative stress-induced damage in bovine spermatozoa

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2017年第1期8卷 67-79页

作者： Eva Tvrdá Anton Kovácik Eva Tusimová Dusan paál Alica Mackovich Jakhongir Alimov Norbert lukác Department of Animal physiology Faculty of Biotechnology and Food Sciences Slovak University of Agriculture in Nitra Tr. A. Hlinku 2 Nitra 94976 Slovakia AgroBioTech Research Centre Slovak University of Agriculture in Nitra Tr. A. Hlinku 2 Nitra 94976 Slovakia Department of Botany and Genetics Faculty of Natural Sciences Constantine the Philosopher University in Nitra Nabbrezie mladeze 91 Nitra 94974 Slovakia Department of General Biology Faculty of Natural Sciences Gulistan State University 4th Microrayon Guliston 120100 Syrdarya Uzbekistan.

background： lycopene（lYC） is a natural carotenoid with powerful reactive oxygen species（ROS） scavenging activities. The aim of this study was to investigate if lycopene has the ability to reverse ROS-mediated alterations to the motility, viability and intracellular antioxidant profile of bovine spermatozoa subjected to ferrous ascorbate（Fe AA）. Spermatozoa were washed out of fresh bovine semen, suspended in 2.9 % sodium citrate and subjected to lYC treatment（0.25, 0.5, 1 or 2 mmol/l） in the presence or absence of Fe AA（150 μmol/l Fe SO4 and 750 μmol/l ascorbic acid） during a 6 h in vitro culture. Spermatozoa motion characteristics were assessed using the Sperm Vision？computer-aided sperm analysis（CAsa） system. Cell viability was examined with the metabolic activity（MTT） assay,ROS generation was quantified via luminometry and the nitroblue-tetrazolium（NBT） test was applied to quantify the intracellular superoxide formation. Cell lysates were prepared at the end of the in vitro culture to investigate the intracellular activity of superoxide dismutase（SOD）, catalase（CAT）, glutathione peroxidase（Gpx） as well as the concentrations of glutathione（GSH） and malondialdehyde（Mda）.Results： FeA A treatment led to a reduced spermatozoa motility（p 〈 0.001）, viability（p 〈 0.001） and a decline of the antioxidant capacity of spermatozoa（p 〈 0.001） but increased the ROS generation（p 〈 0.001）, superoxide production（p 〈 0.001） and lipid peroxidation（p 〈 0.001）. lYC administration resulted in a preservation of the spermatozoa motion parameters（p 〈 0.001）, mitochondrial activity（p 〈 0.001） and antioxidant characteristics（p 〈 0.001 with respect to SOD;p 〈 0.01 in relation to CAT; p 〈 0.05 as for Gpx and GSH） with a concentration range of 1 and 2 mmol/l lYC revealed to be the most ***： Our results suggest that lYC exhibits significant ROS-scavenging and antioxidant properties which may prevent spermatozoa alterations caused by oxidative stress, and preserve the functional

关键词： Antioxidants Bulls Ferrous ascorbate lycopene Oxidative stress Spermatozoa

Recent advances in the understanding and management of chronic pancreatitis pain

在线全文

学校读者我要写书评

暂无评论

Journal of pancreatology 2024年第1期7卷 35-44页

作者： Jessica walker Olivia l.babyok Jami l.saloman Anna Evans phillips Department of Internal Medicine University of Pittsburgh Medical CenterPittsburghPAUnited States Division of Gastroenterology Hepatology and NutritionDepartment of MedicineSchool of MedicineUniversity of PittsburghPittsburghPAUnited States Center for pain Research Center for NeuroscienceSchool of MedicineUniversity of PittsburghPittsburghPAUnited States

Abdominal pain is the most common symptom of chronic pancreatitis(Cp)and is often debilitating for patients and very difficult to *** date,there exists no cure for the *** strategies focus on symptom management and on mitigation of disease progression by reducing toxin exposure and avoiding recurrent inflammatory *** treatment protocols start with medical management followed by consideration of procedural or surgical intervention on selected patients with severe and persistent *** incorporation of adjuvant therapies to treat comorbidities including psychiatric disorders,exocrine pancreatic insufficiency,mineral bone disease,frailty,and malnutrition,are in its early *** clinical studies and animal models have been designed to improve investigation into the pathophysiology of Cp pain,as well as to improve pain *** the array of tools available,many therapeutic options for the management of Cp pain provide incomplete *** still remains much to discover about the neural regulation of pancreas-related *** this review,we will discuss research from the last 5 years that has provided new insights into novel methods of pain phenotyping and the pathophysiology of Cp *** discoveries have led to improvements in patient selection for optimization of outcomes for both medical and procedural management,and identification of potential future therapies.

关键词： Central sensitization Chronic pancreatitis pain phenotyping peripheral sensitization