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A concise review on surface and structural modification of porous zeolite scaffold for enhanced hydrogen storage

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Chinese Journal of Chemical Engineering 2024年第6期70卷 33-53页

作者： B.A.Abdulkadir R.S.R.Mohd Zaki A.T.Abd Wahab S.N.Miskan Anh-Tam Nguyen dai-Viet N.vo H.d.Setiabudi Centre for Research in Advanced Fluid&processes Universiti Malaysia Pahang Al-Sultan AbdullahLebuh Persiaran Tun Khalil YaakobGambangPahang 26300Malaysia Faculty of Chemical&process Engineering Technology Universiti Malaysia Pahang Al-Sultan AbdullahLebuh Persiaran Tun Khalil YaakobGambangPahang 26300Malaysia Center of Excellence for Green Energy and Environmental Nanomaterials(CE@GrEEN) Nguyen Tat Thanh University300A Nguyen Tat ThanhDistrict 4Ho Chi Minh City 755414Viet Nam

Investigating zeolites as hydrogen storage scaffolds is imperative due to their porous nature and favorable physicochemical ***,the storage capacity of the unmodified zeolites has been rather unsatisfactory(0.224%-1.082%(mass))compared to its modified ***,the contemporary focus on enhancing hydrogen storage capacities has led to significant attention towards the utilization of modified zeolites,with studies exploring surface modifications through physical and chemical treatments,as well as the integration of various active *** enhanced hydrogen storage properties of zeolites are attributed to the presence of aluminosilicates from alkaline and alkaline-earth metals,resulting in increased storage capacity through interactions with the charge density of these ***,there is a great demand to critically review their role such as well-defined topology,pore structure,good thermal stability,and tunable hydrophilicity in enhanced hydrogen *** article aimed to critically review the recent research findings based on modified zeolite performance for enhanced hydrogen *** of the factors affecting the hydrogen storage capacities of zeolites that can affect the rate of reaction and the stability of the adsorbent,like pressure,structure,and morphology were studied,and ***,future perspectives,recommendations,and directions for modified zeolites were discussed.

关键词： Zeolites Hydrogen storage Surface modification Adsorption Active metal

Inter-layer interference for multi-layered tight gas reservoir in the absence and presence of movable water

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petroleum Science 2024年第3期21卷 1751-1764页

作者： Tao Zhang Bin-Rui Wang Yu-Long Zhao Lie-Hui Zhang Xiang-Yang Qiao Lei Zhang Jing-Jing Guo Hung vo Thanh National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu60500SichuanChina Shaanxi Yanchang petroleum(Group)Corp.Ltd. Xian710075ShaanxiChina Waseda Research Institute for Science and Engineering Waseda UniversityTokyoJapan

due to the dissimilarity among different producing layers,the influences of inter-layer interference on the production performance of a multi-layer gas reservoir are ***,systematic studies of inter-layer interference for tight gas reservoirs are really limited,especially for those reservoirs in the presence of *** this work,five types of possible inter-layer interferences,including both absence and presence of water,are identified for commingled production of tight gas ***,a series of reservoir-scale and pore-scale numerical simulations are conducted to quantify the degree of influence of each type of *** field evidence from the Yan'an tight gas reservoir(Ordos Basin,China)is found to support the simulation ***,suggestions are proposed to mitigate the potential inter-layer *** results indicate that,in the absence of water,commingled production is favorable in two situations:when there is a difference in physical properties and when there is a difference in the pressure system of each *** reservoirs with a multi-pressure system,the backflow phenomenon,which significantly influences the production performance,only occurs under extreme conditions(such as very low production rates or well shut-in periods).When water is introduced into the multi-layer system,inter-layer interference becomes nearly *** both the gas-rich layer and water-rich layer for commingled production is not desirable,as it can trigger water invasion from the water-rich layer into the gas-rich *** gas-rich layer might also be interfered with by water from the neighboring unperforated water-rich layer,where the water might break the barrier(eg weak joint surface,cement in fractures)between the two layers and migrate into the gas-rich ***,the gas-rich layer could possibly be interfered with by water that accumulates at the bottom of the wellbore due to gravitational diff

关键词： Tight gas Comingled production Interference Two-phase flow Water blocking

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电离辐射诱导椎间盘纤维环细胞衰老的研究

中国矫形外科杂志 2024年第20期 1875-1881页

作者：李佳福钟炯彪 Nam vo 孟旭东杨帆彭家睿湖南师范大学附属岳阳医院(岳阳市人民医院)骨科美国匹兹堡大学骨科

[目的]探讨电离辐射对大鼠纤维环细胞衰老及衰老相关分泌表型表达的影响。[方法]选取6只成熟Sd大鼠，取其腰尾段椎间盘纤维环细胞做体外细胞培养，将同等条件下培养的纤维环细胞随机分为两组，分别接受剂量为0 Gy、15 Gy的X线电离辐射... 详细信息

[目的]探讨电离辐射对大鼠纤维环细胞衰老及衰老相关分泌表型表达的影响。[方法]选取6只成熟Sd大鼠，取其腰尾段椎间盘纤维环细胞做体外细胞培养，将同等条件下培养的纤维环细胞随机分为两组，分别接受剂量为0 Gy、15 Gy的X线电离辐射，检测两组纤维环细胞的衰老情况以及细胞衰老相关分泌表型（senescence-associated secretory phenotype, SASp）的表达。[结果]经15 Gy电离辐射处理后，纤维环细胞在形态学上表现出典型的衰老特征，SA-β-Gal测定显示纤维环细胞阳性染色百分比为77%。CCK-8实验显示纤维环细胞9 d内，未辐射组的Od值逐渐增加（pd值比较的差异无统计学意义（p>0.05）。IF及pCR检测均显示，辐射组衰老相关基因，包括p16 [(5.2±0.3) vs (1.0±0.1), pp21 [(12.9±0.5) vs (1.0±0.1), pp的表达，包括胶原蛋白Col-1 [(1.6±0.1) vs (1.0±0.1), p=0.004]、Col-2 [(7.0±0.4) vs (1.0±0.1), pppproteinase, MMp）-1 [(39.2±0.6) vs (1.0±0.1), pp-3 [(4.5±0.3) vs (1.0±0.1), p<0.001]的相对表达量均显著高于未辐射组。[结论]电离辐射能诱导大鼠椎间盘纤维环细胞衰老，其衰老相关分泌表型的表达明显增加。

关键词：椎间盘退变大鼠纤维环细胞电离辐射细胞衰老

Organic dye removal and recycling performances of graphene oxide-coated biopolymer sponge

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progress in Natural Science:Materials International 2022年第5期32卷 634-642页

作者： Thi Sinh vo Tran Thi Bich Chau vo School of Mechanical Engineering Sungkyunkwan University department of Industrial Management Can Tho University

In this study, a biopolymer sponge(pS) with a crosslinked mixture of gelatin-chitosan-poly(vinyl alcohol) was dipped into graphene oxide(GO) solution to form a composite sponge(CS, GO-coated pS) by a combination of simple dip-coating and freeze-drying procedures, as a sponge-like adsorbent in organic dye removal *** morphological, chemical, crystalline, mechanical and thermal characterizations of the as-obtained sponges were further investigated for the possible changes in the structure of sponge-like adsorbent after coating the GO sheets on the 3d porous structure of pS. The results showed that the CS had possessed effectively organic dye removal performances comparing to the pS. In the adsorption, the Langmuir and pseudo-second-order models corresponding to a monolayer approach and a chemical adsorption were appropriated. The maximum adsorption capacity of Rhodamine B and Congo red reached 126.8 and 135.0 mg·g-1; and 145.6 and 148.6 mg·g-1corresponding onto the pS and CS. It indicates that the maximum adsorption capacity on the CS enhanced significantly comparing to those on the pS owing to the functional GO sheets coated in the 3d porous structure of pS, which leads to supplying further functional adsorption sides on the whole 3d porous structure of CS. Notably, the sponges-like adsorbents could be regenerated and used again without a remarkable decrease of dye removal ability occurred in 9 adsorbing–desorbing cycles. Therefore, the CS prepared in this study can become a potential adsorbent for actual applications because of non-toxic materials, proper structural features, low-cost material and operation, and reliable recyclability.

关键词： Graphene oxide Biopolymer sponge Organic dye Adsorption dye removal Recyclability

A wind tunnel study on control methods for cable dry-galloping

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Frontiers of Structural and Civil Engineering 2016年第1期10卷 72-80页

作者： Hung d. vo Hiroshi KATSUCHI Hitoshi YAMAdA Mayuko NISHIO department of Civil Engineering Yokohama National University Yokohama 240-8501 Japan

The common vibration of cable caused by rain-wind combination has been known as most typical type and a lot kind of its countermeasures has been proposed for suppressing this phenomenon. Recently, stayed-cables were also proved that they could be excited in dry state （without rain）, which is called dry-galloping. Recently, its mechanisms have been explained by axial flow, Reynolds number and so on. To clarify the characteristics of this galloping, wind tunnel test of a cable model with various kinds of wind angle was conducted. Then, three types of countermeasure were examined to suppress dry- galloping of bridge cable. The tests confirmed that the occurrence of dry-galloping depends on relative wind attacked angles and onset reduced wind speed. Furthermore, single spiral wire, double spiral wire and circular ring were found to have high effectiveness in mitigating this galloping when those are installed properly.

关键词： dry-galloping wind-relative angle single spiral wire double spiral wire circular rings

Sensory phenotypic and Molecular Identification of Aromatic Rice Accessions Cultivated in Benin

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Advances in Bioscience and Biotechnology 2024年第3期15卷 195-206页

作者： Chimène Nadège Mahoussi Nanoukon Koffi david Montcho Hambada deless Edmond Fulgence Thiémélé Bignon Meyrix pamela Franzel Loumedjinon Babatoundé Franel Carel Wenceslas Affolabi Amed Sèmèvo Havivi Kéllya Laurinzo déguénon Grâce Finagnon Vitoekpon Arielle Bankole Lambert Gustave djedatin Laboratory of Molecular Biology and Bioinformatics Applied to Genomics National School of Applied Biosciences and Bio-technologies National University of Science Technology Engineering and Mathematics Dassa-Zoumè Benin Laboratory of Molecular Biology and Bioinformatics Applied to Genomics National School of Applied Biosciences and Biotechnologies National University of Science Technology Engineering and Mathematics Dassa-Zoumè Benin Laboratory of plant Horticultural and Forestry Sciences National University of Agriculture Kétou Benin Genetics Teaching and Research Unit Department of Biochemistry-Genetics Peleforo GON COULIBALY University Korhogo C&#244te d’Ivoire

Rice is one of the most widely cultivated cereals in the world, and its aroma is increasingly in demand. With the advancement of research, a major rice flavor gene has been identified on rice chromosome 8. It encodes non-functional betaine aldehyde dehydrogenase leading to the accumulation of 2-acetyl-1-pyrroline which is the major olfactory compound that confers the fragrant character to rice. The aroma of rice is considered a special trait of enormous economic importance that determines the prime price in world trade. To satisfy the needs of the population and reduce rice imports into Benin, we conducted this study to identify aromatic rice accessions grown in Benin. Seventy-two rice accessions collected across Benin were pCR amplified with three SSR markers RM 7049, Aro 7, and RM 223, linked to the fgr (fragrance of rice) aroma gene. Molecular analysis revealed that 12 of the 72 accessions, namely Bagou 19, Bagou 22, Tchaka 34, Foun 15, Tchaka 41, Nana 32, Kan 61, Kung 69, Kung 67, Bagou 20, Agbab 101 and Koum 55 possess the fgr gene and can be considered as aromatic rice accessions. A sensory phenotypic test using KOH was carried out on rice accessions carrying fgr gene. Of the twelve positives, only one had the smell of aromatic rice, like the Azucena control. These results show that Benin also has aromatic rice varieties that can be sold on national and international markets.

关键词： Aromatic Rice 2-Acetyl-1-pyrroline SSR Markers Benin

Ce-and La-doped polymetallic layered double hydroxides for enhanced oxygen evolution reaction performance at high current density

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Science China Chemistry 2024年第8期67卷 2586-2598页

作者： Rinel R.Kimaka p. ping Wang Miao He Senyao Meng Jiasai Yao Huawei Li Cheng Yang Zhenxing Li State Key Laboratory of Heavy Oil processing College of New Energy and MaterialsChina University of Petroleum(Beijing)Beijing 102249China

polymetallic layered double hydroxides are promising cost-effective catalysts for the oxygen evolution reaction(OER) due to their versatile anionic and cationic tunability. Nevertheless, several challenges persist, notably, issues related to low electrical conductivity, poor catalytic activity, and stability, especially at high current density. Herein, we report the design of Ce-and Ladoped Co Ni Fe-layered double hydroxide(Ce La Co Ni Fe-LdH) nanosheets through a facile and scalable in situ self-assembly strategy that displays enhanced OER activity. Experimental and theoretical investigations provide insights into the impact of Ceand La-doping by comparing Ce Co Ni Fe-LdH, La Co Ni Fe-LdH, and pristine Co Ni Fe-LdH, all synthesized using the same methodology. These results reveal that doping Ce^(3+)and La^(3+)into Co Ni Fe-LdH substantially improves its electronic structure,resulting in enhanced conductivity, more oxygen vacancies(vo), electron interaction, and active site formation. Consequently,significantly reduced overpotentials of 175, 314, and 424 m V at 10, 100, and 500 m A cm^(-2), respectively, and a highly stable current density of 120 h in 1 M KOH were achieved. Notably, these performance metrics surpass those of unmodified LdHs and are competitive with many lanthanide-doped transition metal-based LdH electrocatalysts, as well as noble metal catalysts like ruthenium catalysts. This work represents a pioneering effort in doping Ce^(3+)and La^(3+)ions into a functional Co Ni Fe-based electrocatalyst, offering inspiring OER performance and scalability potential.

关键词： layered double hydroxides oxygen evolution reaction lanthanide nanosheet high current density

Advances in endovascular aneurysm management: flow modulation techniques with braided mesh devices

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Stroke & Vascular Neurology 2020年第1期5卷 1-13页

作者： Jessica K Campos Barry Cheaney II Brian V Lien david A Zarrin Chau d vo Geoffrey p Colby Li-Mei Lin Alexander L Coon department of Neurosurgery University of California Irvine School of MedicineOrangeCaliforniaUSA Oregon Health and Science University School of Medicine PortlandOregonUSA Neurosurgery Johns Hopkins UniversityBaltimoreMarylandUSA Johns Hopkins University School of Medicine BaltimoreMarylandUSA UCLA Neurosurgery Ronald Reagan UCLA Medical CenterLos AngelesCaliforniaUSA Carondelet Neurological Institute St.Joseph's HospitalCarondelet Health NetworkTucsonArizonaUnited States

Flow diverters and flow disruption technology,alongside nuanced endovascular techniques,have ushered in a new era of treating cerebral ***,we provide an overview of the latest flow modulation devices and highlight the... 详细信息

关键词： flow braided hered

dialkyl imidazolium acetate ionosilica as efficient and recyclable organocatalyst for cyanosilylation reactions of ketones

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Green Energy & Environment 2020年第2期5卷 130-137页

作者： Thanh Tran duy Alysson duarte Rodrigues Giang vo-Thanh peter Hesemann Institut de Chimie Moléculaire et des Matériaux d'Orsay UniversitéParis-SaclayUMR 818291405 Orsay CedexFrance Institut Charles Gerhardt de Montpellier Universitéde MontpellierUMR 5253 CNRS-UM-ENSCMPlace E.Bataillon34000 MontpellierFrance

We report new heterogeneous organocatalyst based on silica hybrid supported N-heterocyclic carbene(NHC-)*** organocatalyst is formed from an imidazolium iodide based ionosilica material,followed by iodide/acetate anion *** imidazolium acetate generates the organocatalytic carbene via partial deprotonation of the imidazolium ring in *** monitored via EdX,solid state NMR and ion chromatography measurements,the iodide/acetate exchange involving the imidazolium ionosilica material took place only in small *** the fact that the exchanged material contains only a very small amount of acetate,we observed good catalytic activity and recyclability in cyanosilylation reactions of ketones with trimethylsilyl *** versatility of the catalyst was highlighted via reaction with several substrates,yielding the corresponding cyanohydrins in good *** recycling experiments,the material showed decreasing catalytic activity starting from the third reaction cycle,but high catalytic activity can be regenerated via another acetate *** work is important as it highlights the possibility to combine carbene chemistry and silica,which are antagonistic at a first *** show that imidazolium acetate based ionosilicas are therefore heterogeneous'proto-carbenes',and that there is no need to form strongly basic silica supported NHCs to obtain heterogeneous *** work therefore opens the route towards heterogeneous and re-usable NHC-organocatalysts from supported ionic liquid imidazolium acetates.

关键词： N-heterocyclic carbenes Ionosilica Heterogeneous organocatalysis Cyanosilylation Ionic liquids