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Enhancement of freshwater production of the seawater greenhouse condenser

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Journal of Arid land 2021年第4期13卷 397-412页

作者： Tahani K BAIT SUWAIlAM Abdulrahim M Al-ISMAIlI Nasser A Al-AZRI l H Janitha JEEWANTHA Hemesiri KOTAGAMA Department of Soils Water and Agricultural EngineeringSultan Qaboos UniversityAl-Khoud 123Oman Department of Mechanical and Industrial Engineering Sultan Qaboos UniversityAl-Khoud 123Oman Department of Natural Resource Economics Sultan Qaboos UniversityAl-Khoud 123Oman

Seawater greenhouse(SWGH)is a technology established to overcome issues related to open field cultivation in arid areas,such as the high ambient temperature and the shortage of *** adopts the humidification-dehumidification concept where evaporated moisture from a saline water source is condensed to produce freshwater within the greenhouse *** condenser designs are adopted to increase freshwater production in order to meet the irrigation *** aim of this study was to experimentally investigate the practicality of using the packed-type direct contact condenser in the SWGH to produce more freshwater at low costs,simple design and high efficiency,and to explore the impact of the manipulating six operational variables(inlet air temperature of the humidifier,air mass flowrate of the humidifier,inlet water temperature of the humidifier,water mass flowrate of the humidifier,inlet water temperature of the dehumidifier and water mass flowrate of the dehumidifier)on freshwater condensation *** this purpose,a direct contact condenser was designed and ***-four full factorial experiments were conducted to study the effect of the six operational *** variable was operated at two levels(high and low flowrate),and each experiment lasted for 10 min and followed by a 30-min waiting *** showed that freshwater production varied between 0.257 and 2.590 l for every 10 *** using Minitab statistical software to investigate the significant variables that contributed to the maximum freshwater production,it was found that the inlet air temperature of the humidifier had the greatest influence,followed by the inlet water temperature of the humidifier;the former had a negative impact while the latter had a positive impact on freshwater *** response optimizer tool revealed that the optimal combination of variables contributed to maximize freshwater production when all variables were in the high mode and the inlet air

关键词： seawater greenhouse humidification-dehumidification direct contact condenser freshwater production water desalination

Management of cytomegalovirus corneal endotheliitis

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Eye and Vision 2021年第1期8卷 18-30页

作者： Angela H.Y.Wong Wee Nie Kua Alvin l.Young Kelvin H.Wan Department of Ophthalmology Tuen Mun HospitalHong KongChina Department of Ophthalmology and Visual Sciences Prince of Wales HospitalHong KongChina Department of Ophthalmology and Visual Sciences The Chinese University of Hong KongHong KongChina

Background:Cytomegalovirus(CMV)can manifest as corneal endotheliitis in immunocompetent *** diagnosis is prudent to prevent endothelial cell loss,which could ultimately lead to corneal *** DNA was first detected in an eye with corneal endotheliitis in 2006;since then,clinical evidence from numerous case reports and case series have *** text:In this narrative review,we identified several drugs,including ganciclovir,valganciclovir,and their combination in oral,intravenous,intravitreal,and topical forms in different concentrations,together with the judicious use of topical steroids,have reported variable *** has yet to be any prospective comparative study evaluating the efficacy and safety of these assorted forms of treatment;clinical evidence is based on case reports and case *** endotheliitis presenting with corneal edema can masquerade as other corneal diseases and thus poses a great challenge especially in post-keratoplasty *** awareness is needed before and after keratoplasty to start prompt prophylaxis and ***:There is no consensus on the management of CMV *** studies are much needed to elucidate the optimal treatment modality,regime,and duration in the treatment and prophylaxis of CMV endotheliitis.

关键词： Cytomegalovirus CMV Endotheliitis Keratoplasty Corneal transplant Cornea

A Statistical Mechanical Analysis on the Bound State Solution of an Energy-Dependent Deformed Hulthén Potential Energy

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Communications in Theoretical Physics 2019年第9期71卷 1127-1138页

作者： B.C.lütfüoglu A.N.Ikot U.S.Okorie A.T.Ngiangia Department of Physics Faculty of ScienceAkdeniz University07058AntalyaTurkey Department of Physics Faculty of ScienceUniversity of Hradec KraloveRokitanskeho6250003Hradec KraloveCzechia Department of Physics Theoretical Physics GroupUniversity of Port HarcourtChobaPort HarcourtNigeria Department of Physics Akwa Ibom State UniversityIkot AkpadenP.M.B.1167UyoNigeria

In this article, we investigate the bound state solution of the Klein Gordon equation under mixed vector and scalar coupling of an energy-dependent deformed Hulthén potential in D dimensions. We obtain a transcendental equation after we impose the boundary conditions. We calculate energy spectra in four different limits and in arbitrary dimension via the Newton-Raphson method. Then, we use a statistical method, namely canonical partition function, and discuss the thermodynamic properties of the system in a comprehensive way. We find out that some of the thermodynamic properties overlap with each other, some of them do not.

关键词： Klein-Gordon equation energy-dependent deformed Hulthén potential energy bound state solution thermodynamic properties

Crystal structures and biochemical studies of human lysophosphatidic acid phosphatase type 6

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Protein & Cell 2013年第7期4卷 548-561页

作者： Jun li Yu Dong Xingru lü lu Wang Wei Peng Xuejun C.Zhang Zihe Rao National laboratory of Biomacromolecules Institute of BiophysicsChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Structure Biology laboratory Tsinghua UniversityBeijing 100084China Tianjin Key laboratory of Protein Science College of Life SciencesNankai UniversityTianjin 300071China

lysophosphatidic acid(lPA)is an important bioac-tive phospholipid involved in cell signaling through G-protein-coupled receptors *** is also involved in balancing the lipid composition inside the cell,and modulates the function of lipid rafts as an intermediate in phospholipid *** of its involvement in these important processes,lPA degradation needs to be regulated as precisely as its ***-tidic acid phosphatase type 6(ACP6)is an lPA-specifi c acid phosphatase that hydrolyzes lPA to monoacylglyc-erol(MAG)and ***,we report three crystal structures of human ACP6 in complex with malonate,l-(+)-tartrate and tris,*** analyses revealed that ACP6 possesses a highly conserved Rossmann-fold-like body domain as well as a less conserved cap *** vast hydrophobic substrate-binding pocket,which is located between those two domains,is suitable for ac-commodating lPA,and its shape is different from that of other histidine acid phosphatases,a fact that is consistent with the observed difference in substrate *** analysis of the binding of three molecules in the active site reveals the involvement of six conserved and crucial residues in binding of the lPA phosphate group and its *** structure also indicates a water-supplying channel for substrate *** structural data are consistent with the fact that the enzyme is active as a *** combination with additional mutagenesis and enzyme activity studies,our structural data provide important insights into substrate recognition and the mechanism for catalytic activity of ACP6.

关键词： lysophosphatidic acid histidine acid phos-phatase crystal structure

Microstructural Evolution and Properties of a High Strength Steel with Different Direct Quenching Processes

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Journal of Iron and Steel Research International 2015年第4期22卷 344-351页

作者： Feng lU Chao WANG long l Zhao-dong WANG Guo-dong WANG Raja Devesh Kumar MISRA State Key laboratory of Rolling and Automation Northeastern University Department of Metallurgical and Materials Engineering University of Texas at El Paso

A high strength low alloy steel with low carbon equivalent was selected for simulating online direct quench- ing and coiling （DQ-C） process. The influence of stop quenching temperature on mechanical properties and micro- structures was studied and compared with normal direct quenching and tempering （DQ-T） process. The study con- firmed that required mechanical properties were obtained for both the processes. Properties of the experimental steel with DQ-C process could reach the same level as that of DQ-T process in general. In the DQ-C process, strength de- creased with increase in stop quenching temperature. Martensite was obtained and experienced an aging process at stop quenching temperature below Mi. On fast cooling below Mi, martensite was partially transformed and carbon partitioning occurred during slow cooling. The reduction in solid solution carbon and increased amount of retained austenite led to lower strength compared with the DQ-T process. DQ-C process was more favorable for microalloy carbide precipitation. However, impact toughness under different cooling conditions was adequate because of low car- bon equivalent and refined microstructure.

关键词： high strength steel direct quenching slow cooling carbon partitioning precipitation

Replication of natural surface topographies to generate advanced cell culture substrates

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Bioactive Materials 2023年第10期28卷 337-347页

作者： N.O.Monteiro J.F.Fangueiro R.l.Reis N.M.Neves 3B’s Research Group I3Bs-Research Institute on BiomaterialsBiodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineAveParkParque de Ciencia e Tecnologi1Zona Industrial da Gandr14805-017BarcoGuimaraesPortugal ICVS/3B’s-PT Government Associate laboratory Brag1Guimar˜aesPortugal

Surface topographies of cell culture substrates can be used to generate in vitro cell culture environments similar to the in vivo cell niches. In vivo, the physical properties of the extracellular matrix (ECM), such as its topography, provide physical cues that play an important role in modulating cell function. Mimicking these properties remains a challenge to provide in vitro realistic environments for cells. Artificially generated substrates’ topographies were used extensively to explore this important surface cue. More recently, the replication of natural surface topographies has been enabling to exploration of characteristics such as hierarchy and size scales relevant for cells as advanced biomimetic substrates. These substrates offer more realistic and mimetic environments regarding the topographies found in vivo. This review will highlight the use of natural surface topographies as a template to generate substrates for in-vitro cell culture. This review starts with an analysis of the main cell functions that can be regulated by the substrate’s surface topography through cell-substrate interactions. Then, we will discuss research works wherein substrates for cell biology decorated with natural surface topographies were used and investigated regarding their influence on cellular performance. At the end of this review, we will highlight the advantages and challenges of the use of natural surface topographies as a template for the generation of advanced substrates for cell culture.

关键词： Biomimetic topography Cell culture substrates Natural surface topographies

Preharvest application of melatonin induces anthocyanin accumulation and related gene upregulation in red pear (Pyrus ussuriensis)

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Journal of Integrative Agriculture 2021年第8期20卷 2126-2137页

作者： SUN Hui-li WANG Xin-yue SHANG Ye WANG Xiao-qian DU Guo-dong lÜDe-guo College of Horticulture Shenyang Agricultural UniversityShenyang 110866P.R.China Key laboratory of Fruit Quality Development and Regulation of liaoning Province Shenyang Agricultural UniversityShenyang 110866P.R.China

Anthocyanins are important components in the peel of red pears and contribute to the appearance of the *** application is known to affect anthocyanin biosynthesis,but the effect of preharvest melatonin application on fruit coloration remains largely *** objective of this study was to determine the effects of preharvest melatonin application on pigmentation,phenolic compounds,and the expression of related genes in Nanhong pear(Pyrus ussuriensis).The applications were performed during the pre-color-change period by spraying 50 or 200μmol l^(-1)of melatonin on *** found that treatment with melatonin had a significant effect on color *** concentrations of anthocyanins and flavonols were enhanced by melatonin treatment,whereas hydroxycinnamate and flavanol concentrations were *** real-time PCR analyses indicated that the transcription levels for most anthocyanin biosynthetic genes and anthocyanin-related transcription factors were induced by *** application also stimulated the expression of melatonin biosynthesis-related genes and consequently caused an increase in endogenous melatonin *** results provide insights into melatonin-induced fruit coloration and will facilitate the application of exogenous melatonin in agriculture.

关键词： melatonin anthocyanin pear phenolic peel pigmentation

Improvement on the manipulation of a single nitrogen-vacancy spin and microwave photon at single-quantum level

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Communications in Theoretical Physics 2021年第6期73卷 43-50页

作者： Yuan Zhou Dong-Yan lü Guang-Hui Wang Yan-Hua Fu Ming-Yao He Hong-Tao Ren School of Science Hubei University of Automotive TechnologyShiyan 442002China Department of of Automobile Engineering Hubei University of Automotive TechnologyShiyan 442002China School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000China

It remains a great challenge to realize direct manipulation of a nitrogen-vacancy(NV)spin at the single-quantum level with a microwave(MW)*** an alternative,a hybrid system with the spin–phonon–photon triple interactions mediated by a squeezed cantilever-type harmonic resonator is *** to the general mechanical parametric amplification of this in-between phonon mode,the direct spin–phonon and photon–phonon couplings are both exponentially enhanced,which can even further improve the coherent manipulation of a single NV spin and MW photon with a higher *** view of this triple system with enhanced couplings and the additional sideband adjustable designs,this scheme may provide a more efficient phonon-mediated platform to bridge or manipulate the MW quantum and a single electron spin *** is also hoped to evoke wider applications in the areas of quantum state transfer and preparation,ultrasensitive detection and quantum nondestructive measurement,etc.

关键词： NV center mechanical parametric amplification quantum manipulation

Efficient Silencing of Endogenous MicroRNAs Using Artificial MicroRNAs in Arabidopsis thaliana

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Molecular Plant 2011年第1期4卷 157-170页

作者： Andrew l. Eamens Claire Agius Nell A. Smith Peter M. Waterhouse Ming-Bo Wang CSIRO Plant Industry GPO Box 1600 Canberra ACT 2601 Australia School of Molecular Bioscience University of Sydney Sydney NSW 2006 Australia

We report here that the expression of endogenous microRNAs （miRNAs） can be efficiently silenced in Arabi- dopsis thaliana （Arabidopsis） using artificial miRNA （amiRNA） technology. We demonstrate that an amiRNA designed to target a mature miRNA directs silencing against all miRNA family members, whereas an amiRNA designed to target the stem-loop region of a miRNA precursor transcript directs silencing against only the individual family member targeted. Furthermore, our results indicate that amiRNAs targeting both the mature miRNA and stem-loop sequence direct RNA silencing through cleavage of the miRNA precursor transcript, which presumably occurs in the nucleus of a plant cell during the initial stages of miRNA biogenesis. This suggests that small RNA （sRNA）-guided RNA cleavage in plants occurs not only in the cytoplasm, but also in the nucleus. Many plant miRNA gene families have been identified via sequencing and bio- informatic analysis, but, to date, only a small tranche of these have been functionally characterized due to a lack of ef- fective forward or reverse genetic tools. Our findings therefore provide a new and powerful reverse-genetic tool for the analysis of miRNA function in plants.

关键词： MicroRNA artificial microRNA RNA silencing.