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光谱学与光谱分析 2019年第9期39卷 2982-2988页

作者： Abeer A.El-Habeeb Moamen s.Refat College of science Princess Nourah Bint Abdulrahman University Department of Chemistry Riyadh 11671 Saudi Arabia Chemistry Department Faculty of Science Taif University P.O. Box 888 Al-Hawiah Taif 21974 Saudi Arabia Department of Chemistry Faculty of Science Port Said Port Said University Egypt

A four new penicillinate complexes were prepared through the chemical interactio ns of penicillin potassium salt (Pin) with YCl 3, geCl 4, WCl 6 and siCl 4 m etal ions. These metal complexes were characterized using spectroscopic techniqu es (e.g. 1H-NMR, infrared, electronic UV-Vis) as well as elemental, cond uctivity, and magnetic measurements. The molar conductance values were highly, s howing their electrolytic nature. The magnetic and electronic study strongly rec ommends the octahedral geometry of all penicillinate complexes. A monomeric stru ctures of Pin complexes are proposed with octahedral coordinated metals ions. Th e metal ions are coordinated toward Pin as tridentate ligand through the amide a nd β-lactam carbonyls and a carboxylate group from penicillin. The in vitro antimicrobial activity of all the complexes, at concentrations in μg·mL^-1 , was screened against four bacterial pathogens, namely, Bacillus subtilis , Escherichia coli, Pseudomonas aeruginosa , and staphylococcus aureus , and two kinds of fungi Aspergillus flavus and Candida albicans showed better activi ty compared to parent drug and control drug. The anti-cancer inhibition of the tungsten(Ⅵ) complex was assessed against the human hepato cellular carcinoma (H epg-2) tumor cell line with IC50 value is 646 μg·mL^-1 .

关键词： Penicillin Yttrium germanium Tungsten si licon FTIR Complexation Biological

Natural Bond Orbital(NBO)Population Analysis,First Order Hyperpolarizabilities and Thermodynamic Properties of Cyclohexanone

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光谱学与光谱分析 2015年第6期35卷 1506-1511页

作者： Rubarani P.gangadharan s.sampath Krishnan Department of Physics Rajalakshmi Engineering College Department of Applied Physics Sri Venkateswara College of Engineering

The molecular structure of cyclohexanone was calculated by the B3LYP density functional model with 6-31g(d,p)and 6-311++g(d,p)basis set by gaussian *** results from natural bond orbital(NBO)analysis have been analyzed in terms of the hybridization of atoms and the electronic structure of the title *** electron density based local reactivity descriptors such as Fukui functions were *** dipole moment(μ)and polarizability(α),anisotropy polarizability(Δα)and first order hyperpolarizability(βtot)of the molecule have been *** properties of the title compound were calculated at different temperatures.

关键词： Density functional theory(DFT) Natural Bond Orbital(NBO)Analysis Hyperpolarizability

Influence of europium doping on conductivity of LiNiPO_4

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Transactions of Nonferrous Metals society of China 2012年第2期22卷 342-347页

作者： M.PRABU s.sELVAsEKARAPANDIAN A.R.KULKARNI s.KARTHIKEYAN C.sANJEEVIRAJA Department of Metallurgical Engineering and Material science Indian Institute of Technology BombayMumbaiIndia Department of Physics Kalasalingam UniversityKrishnankoil-626126TamilnaduIndia school of Advanced sciences VIT UniversityVellore 632014TamilnaduIndia Department of Physics Alagappa UniversityKaraikudi-630003TamilnaduIndia

Europium doped LiNiPO4 and undoped LiNiPO4 were prepared by Pechini method. Compound formation temperature was confirmed from thermogravimetry and differential thermal analysis （Tg/DTA）. Powder X-ray diffraction （XRD） pattern confirmed the formation of pure LiNiPO4 compound with an orthorhombic structure. The conductivity and modulus analyses of the samples were carried out at different temperatures and frequencies using the complex impedance spectroscopy technique. The conductivity parameters such as ion hopping frequency and the charge cartier concentration term were calculated using Almond and West formalisms. An increase of one order of magnitude in the ionic conductivity has been observed for 1.0% Eu-doped LiNiPO4. （mole fraction）. The complex modulus studies suggest the presence of non-Debye type of relaxation in the materials.

关键词： LiNiPO4 ionic conductivity impedance spectroscopy doping hopping

Editorial for a special issue“Nano energy materials and devices for miniaturized electronics and smart systems”

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Nano Materials science 2021年第2期3卷 105-106页

作者： Feng Zhu Oliver g.schmidt Changchun Institute of Applied Chemistry China Leibniz IFW DresdenGermany Chemnitz Chemnitz University of Technology Germany

The smart Era urgently demands small-size, low-energy consuming and multi-functional devices which can satisfy versatile application scenarios, including autonomous systems, wireless sensor networks,biomedical equipment, wearable gadgets, and the Internet of *** overwhelming trend has drawn much attention and stimulates intensive collaborative efforts spanning diverse fundamental and applied research related to energy generation-harvesting-storage-managementapplications at the small scale. For instance, on one hand.

关键词： energy smart versatile

Biomolecules of Interest Present in the Main Industrial Wood species Used in Indonesia-A Review

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Journal of Renewable Materials 2021年第3期9卷 399-449页

作者： Resa Martha Mahdi Mubarok Wayan Darmawan Wasrin syafii stéphane Dumarcay Christine gérardin Charbonnier Philippe gérardin Universitéde Lorraine Institut National de Recherche pour l’Agriculturel’Alimentation et l’EnvironnementLaboratoire d'Etudes et de Recherche sur le Matériau BoisNancyFrance Department of Forest Products Faculty of Forestry and EnvironmentInstitut Pertanian BogorBogor UniversityBogorIndonesia

As a tropical archipelagic country,Indonesia’s forests possess high biodiversity,including its wide variety of wood *** of biomolecules released from woody plant extracts has been gaining attractive interests since in the middle of 20th *** paper focuses on a literature review of the potential valorisation of biomolecules released from twenty wood species exploited in *** has revealed that depending on the natural origin of the wood species studied and harmonized with the ethnobotanical and ethnomedicinal knowledge,the extractives derived from the woody plants have given valuable heritages in the fields of medicines and *** families of the bioactive compounds found in the extracts mainly consisted of flavonoids,stilbenes,stilbenoids,lignans,tannins,simple phenols,terpenes,terpenoids,alkaloids,quinones,and *** addition,biological or pharmacological activities of the extracts/isolated phytochemicals were recorded to have antioxidant,antimicrobial,antifungal,anti-inflammatory,anti-diabetes,anti-dysentery,anticancer,analgesic,anti-malaria,and anti-Alzheimer *** from these remarkable characteristics of woody plant extractives,further studies concerning the valorisation of these extractives in the fields of nutraceutical,cosmetic,bio-control,bio-stimulation,and other advanced applications would be of interest.

关键词： Bark by-product bioactivity extractive Indonesia industry molecule valorization wood species

symmetric surface Momentum and Centripetal Force for a Particle on a Curved surface

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Communications in Theoretical Physics 2018年第9期69卷 263-267页

作者： M. s. shikakhwa Physics group Middle East Technical University Northern Cyprus Campus Kalkanli Guzelyurt via Mersin 10 Turke

The Hermitian surface momentum operator for a particle confined to a 2D curved surface spanned by orthogonal coordinates and embedded in 3D space is expressed as a symmetric expression in derivatives with respect to the surface coordinates and so is manifestly along the surface. This is an alternative form to the one reported in the literature and usually named geometric momentum, which has a term proportional to the mean curvature along the direction normal to the surface, and so"apparently"not along the surface. The symmetric form of the momentum is the sum of two symmetric Hermitian operators along the two orthogonal directions defined by the surface *** centripetal force operator for a particle on the surface of a cylinder and a sphere is calculated by taking the time derivative of the momentum and is seen to be a symmetrization of the well-known classical expressions.

关键词： quantum mechanics on a curved surface geometric momentum quantum centripetal force

Effect on Landau damping rates for a non-Maxwellian distribution function consisting of two electron populations

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Chinese Physics B 2013年第3期22卷 358-365页

作者： M.N.s.Qureshi s.sehar H.A.shah J.B.Cao space science Institute Beihang University Department of Physics Government College University

In many physical situations where a laser or electron beam passes through a dense plasma,hot low-density electron populations can be generated,resulting in a particle distribution function consisting of a dense cold population and a small hot *** of such low-density electron distributions can alter the wave damping rate.A kinetic model is employed to study the Landau damping of Langmuir waves when a small hot electron population is present in the dense cold electron population with non-Maxwellian distribution *** of plasma from Maxwellian distributions significantly alters the damping rates as compared to the Maxwellian *** damping is found for highly nonMaxwellian distributions as well as plasmas with a higher density and hot electron *** of weak damping is also established when the distribution contains broadened flat tops at the low energies or tends to be *** results may be applied in both experimental and space physics regimes.

关键词： Landau damping Langmuir waves two electron populations non-Maxwellian distribution function

Health Data Deduplication Using Window Chunking-signature Encryption in Cloud

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Intelligent Automation & soft Computing 2023年第4期36卷 1079-1093页

作者： g.Neelamegam P.Marikkannu Department of Computer science and Engineering Anna University Regional Campus CoimbatoreCoimbatore641046India

Due to the development of technology in medicine,millions of health-related data such as scanning the images are *** is a great challenge to store the data and handle a massive volume of *** data is stored in the cloud-fog storage *** cloud-Fog based health model allows the users to get health-related data from different sources,and duplicated informa-tion is also available in the ***,it requires an additional sto-rage area,increase in data acquisition time,and insecure data replication in the *** paper is proposed to eliminate the de-duplication data using a window size chunking algorithm with a biased sampling-based bloomﬁlter and provide the health data security using the Advanced signature-Based Encryp-tion(AsE)algorithm in the Fog-Cloud Environment(WCA-BF+AsE).This WCA-BF+AsE eliminates the duplicate copy of the data and minimizes its sto-rage space and maintenance *** data is also stored in an efﬁcient and in a highly secured *** security level in the cloud storage environment Win-dows Chunking Algorithm(WsCA)has got 86.5%,two thresholds two divisors(TTTD)80%,Ordinal in Python(ORD)84.4%,Boom Filter(BF)82%,and the proposed work has got better security storage of 97%.And also,after applying the de-duplication process,the proposed method WCA-BF+AsE has required only less storage space for variousﬁle sizes of 10 KB for 200,400 MB has taken only 22 KB,and 600 MB has required 35 KB,800 MB has consumed only 38 KB,1000 MB has taken 40 KB of storage spaces.

关键词： Health data encryption chunks cloud fog deduplication bloomﬁlter Algorithm 3:generation of Key

Laser Induced Breakdown spectroscopy for Comparative Quantitative Analysis of Betel Leaves from Pakistan

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光谱学与光谱分析 2018年第10期38卷 3295-3302页

作者： I Rehan K Rehan s sultana R Muhammad Department of Applied Physics Federal Urdu University of ArtsScience and TechnologyIslamabad 44000Pakistan state Key Laboratory of Magnetic Resonance and Atomic&Molecular Physics Wuhan Institute of Physics and MathematicsChinese Academy of SciencesWuhan430071.China Department of Chemistry Islamia College UniversityPeshawar 25120Pakistan

Laser induced breakdown spectroscopy(LIBs)was applied for the elemental analysis and exposure of the heavy metals in betel leaves in *** Nd∶YAg(1064 nm)in conjunction with a suitable detector(LIBs 2000+,Ocean Optics,Inc)having the optical resolution of 0.06 nm was used to record the emission spectra from 220 to 720 *** like Al,Ba,Ca,Cr,Cu,P,Fe,K,Mg,Mn,Na,P,s,sr,and Zn were found to present in the *** relative abundances of the observed elements were calculated through standard calibration curve method,integrated intensity ratio method,and weight percentage LIBs *** findings were validated by comparing its results with the results obtained using a typical analytical technique of Inductively Coupled plasma-optical emission spectroscopy(ICP-OEs).Limit of detection(LOD)of the LIBs system was also estimated for heavy *** experience gain through this work implies that LIBs could be highly applicable for testing the quality and purity of food products.

关键词： Laser induced breakdown spectroscopy(LIBs) spectral analysis Inductively coupled plasma-optical emission spectrometry Limit of detection(LOD)

Antitangling and manufacturable Fog Harps for high‐efficiency water harvesting

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Droplet 2023年第4期2卷 38-44页

作者： Jimmy K.Kaindu Kevin R.Murphy Nicholas g.Kowalski Alexandra N.Jones Matthew Davis Fleming Brook s.Kennedy Jonathan B.Boreyko Department of Mechanical Engineering Virginia TechBlacksburgVirginiaUSA Department of Biomedical Engineering and Mechanics Virginia TechBlacksburgVirginiaUSA school of Architecture and Design Virginia TechBlacksburgVirginiaUSA samscreen Inc. ConklinNew YorkUSA

Fog Harps harvest substantially more water than conventional mesh‐based ***,to date,all large‐scale Fog Harps have been impractically hand‐wound at low wire tensions and suffer from elastocapillary wire ***,we develop large‐scale and high‐tension Fog Harps that are manufacturable and *** Fog Harps retain the record‐setting fog harvesting efficiency(η≈17%)of their optimized scale‐model counterparts,while uniquely enabling practical real‐life *** was achieved by adapting the industrial process for making harp screens,a pre‐existing technology used for screening solid *** critical tension required to minimize wire tangling was rationalized by an improved elastocapillary tangling model.

关键词： harvesting capillary rational