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Comparative Study of Antimicrobial Activity and Phytochemical Analysis of Methanolic and Aqueous Extracts of the Fruit of Emblica Officinalis against Pathogenic Bacteria

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Journal of Traditional chinese Medicine 2011年第3期31卷 246-250页

作者： avneesh Kumar Bilal Ahmd Tantry Shiak Rahiman Upasna Gupta Institute of Applied Medicines & Research GhaziabadUttar PradeshIndia Department of Microbiology College of MedicineAl Jouf UniversitySaudi Arabia Department of Biochemistry College of MedicineAl Jouf UniversitySaudi Arabia

Objective：To investigate antimicrobial potential of aqueous（infusions,decoctions） and methanlic extracts（1：2 and 1：5 concentrations） of Emblica officinalis（amla） against seven pathogenic bacteria namely Staphylococcs aureus,Staphylococcus saprophyticus,Escherichia coli,Enterococcus faecalis,Enterococcus cloacae,Proteus vulgaris and Klebsiella ***：The well diffusion technique was *** minimum inhibitory concentration（MIC） was determined using micro-broth dilution methods and phytochemical screening was done as per standard ***：Aqueous infusion extract of amla exhibited potent antimicrobial activity against *** followed by *** phytochemical analysis of *** aqueous extracts（infusions and decoctions） only showed presence of tannins,saponins,flavanoids,Terpenoids and *** of aqueous extract of *** was most active against *** MIC of methanol extract of *** shows maximum activity against ***：Emblica officinalis definitely possesses potent antimicrobial activities and this can serve as an important platform for the development of inexpensive,safe and effective medicines

关键词： Emblica officinalis infusion decoction traditional medicine

Link between caries,periodontitis,and pregnancy:The role of personalized oral hygiene

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World Journal of Clinical Cases 2025年第6期13卷 51-57页

作者： Melissa Martínez Nieto Martha Leticia De León Rodríguez Francisco Javier Alcaraz Baturoni Alma Alicia Soto chávez Sarah Monserrat LomelíMartínez Periodontics Program Department of Integrated Dentistry ClinicsCentro Universitario de Ciencias de la SaludUniversidad de GuadalajaraGuadalajara 44340Mexico Department of Medical and Life Sciences Centro Universitario de la CiénegaUniversidad de GuadalajaraOcotlán 47810JaliscoMexico Master of Public Health Department of Well-being and SustainableCentro Universitario del NorteUniversidad de GuadalajaraColotlán 46200Mexico

Optimal health during pregnancy is crucial for ensuring the well-being of the mother and the developing *** article is focused on the impact of oral health and the role of personalized oral hygiene management in addressing prevalent dental issues among pregnant women,with particular emphasis on periodontal disease and dental *** the high prevalence of these dental problems and their association with obstetric complications such as pre-term birth and low birth weight,many pregnant women do not receive adequate dental *** gap in care is often due to misconceptions about the safety of dental treat-ments during pregnancy and lack of awareness on the part of healthcare *** of the impacts of oral health and personalization of oral hygiene strategies such as tailored education and support,have proven effective in improving oral health in this *** reductions in the incidence of caries and periodontal disease may be achieved by adapting care to the specific needs of each patient,thereby enhancing maternal and fetal health *** of personalized oral hygiene management into maternal health pro-grams and enhancement of ongoing education for pregnant women and healthcare professionals are essential steps in the reduction of pregnancy-related risks and improvement of maternal and neonatal *** Tip:In this article,we reviewed a recent study on the effects of personalized oral hygiene management on the oral health of pregnant women,as discussed in the article by Men et *** study demonstrated that personalized oral hygiene interventions significantly improved oral health outcomes during pregnancy by reducing the prevalence of dental caries and periodontal *** emphasized the importance of individualized oral care programs that integrate education and tailored support,and we highlighted their significance in enhancing maternal and fetal *** approach underscores the need for

关键词： Pregnancy Periodontal disease Periodontitis Dental caries Oral hygiene

Electronic factor in electron self-exchange reaction of hydrated redox ion pairs from thermodynamic data

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chinese Journal of chemistry 1997年第3期15卷 201-210页

作者： Bu, YX Deng, ch SHANDONG UNIV INST THEORET CHEMSHANDONG 250100PEOPLES R CHINA

An accurate scheme for determining the electronic factor of the electron self-exchange reaction in solution is presented in this paper. The used various activation parameters and slopes of potential energy surfaces are obtained in terms of an improved activation model and the accurate potential function determined from the vibrational spectroscopic and thermodynamic data. The coupling matrix elements are determined using numerical integral method over the perturbed double-zeta Slater type state functions. Theoretical results of electronic factor in this work are found in close agreement with those extracted from experimental rate constant data and to be less than unity. Results indicate that outer-sphere electron transfer reactions in solution involving hydrated transition metal ions are nonadiabatic in nature.

关键词： electronic factor Landau-Zener probability activation model hydrated transition metal ions

Polygeneration Study of Low-to-Medium Enthalpy Geothermal Reservoirs in Mexico

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Journal of Thermal Science 2021年第3期30卷 1077-1087页

作者： chÁVEZ Oscar GODÍNEZ Francisco Tecnológico Nacional de México/I.T.chihuahua.Av.Tecnológico 2909 C.P.31310ChihuahuaChihuahuaMéxico Instituto de Ingeniería Universidad Nacional Autónoma de MéxicoUNAMC.U.Ciudad de MéxicoC.P.04510México Polo Universitario de Tecnología Avanzada Universidad Nacional Autónoma de MéxicoVía de la Innovación No.410Autopista Monterrey-Aeropuertokm.10 PIITC.P.66629Apodaca Nuevo LeónMéxico

This study combines the thermodynamic analysis of a polygeneration system along with the numerical modelling of the thermal behavior of geothermal reservoirs in Mexico to exploit their *** reservoir was modeled as a porous medium assuming a five-spot well configuration and local thermal *** heat conduction-convection along with the Laplace equations were solved to compute temperature distributions,the useful life and the optimum distance between injection-extraction *** predicted temperature and pressure of the geothermal fluid at the outlet of the reservoir were exploited in the polygeneration system consisting of:(1)a Rankine cycle,(2)an absorption refrigeration cycle,and(3)a heat *** developed approach allows calculating both the optimal distance between injection-extraction wells and the global(utilization)efficiency of six arrangements(each composed by a reservoir connected to a polygeneration system)by assuming that reservoirs have a lifespan of 30 *** also show that:(a)due to the low efficiency of the Rankine cycle,very little thermal energy is converted into electrical one;(b)not only the temperature and the size are important when evaluating the power production performance of reservoirs,but also the permeability plays a fundamental role;(c)the first law efficiency of the polygeneration system ranges from 41.9%to 43.7%;(d)the utilization efficiency of the six arrangements lies in the range between 25.8%and 31%.

关键词： polygeneration system geothermal reservoir local thermal equilibrium low-to-medium enthalpy

Photochemical reaction of azobenzene in solvent-swollen Nafion membranes

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chinese Journal of chemistry 1996年第6期14卷 541-548页

作者： Tung, ch Guan, JQ chINESE ACAD SCI INST PHOTOG CHEMBEIJING 100101PEOPLES R CHINA

The photochemical reactions of azobenzene (AB) incorporated into different solvent-swollen Nafion membranes were investigated. The location of azobenzene in water-swollen Nafion membranes was different from that in methanol-swollen Nafion membranes, which was responsible for the different photochemical reactions of AB. In methanol-swollen Nafion membranes only transcis isomerization took place, while in water-swollen Nafion membranes photochemical cyclization of AB occurred after rapid transcis isomerization. The relation between the relative quantum yields and the light intensity showed that the cyclization was a two-photo process. The numbers of AB molecules per cluster (n(AB)/cluster) in Nafion membranes with different AB concentrations and different water contents were calculated. Under the experimental condition two competitive photocyclization mechanisms were suggested by n(AB)/cluster in Nafion membranes, relative quantum yields of the cyclization, and the change of the ratio of benzidine to benzo[c]cinnoline.

关键词： Nafion photochemical reaction azobenzene

EMBARKING ON OUR NEW TASKS

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中华医学杂志(英文版) 1990年第8期103卷 611-612页

作者： FENG, ch

The year of 1990 marks the 103rd anniversary of the chinese medical Journal. On April 25, members of the new session of the Editorial Board gathered in Nanjing, one of china’s historic capitals, to join in a 2-day meeting for free airing of views and enthusiastic discussion on the question of embarking on our new tasks.

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Contrasting plant growth performance of invasive polyploid and native diploid Prosopis is mediated by the soil bacterial community

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Ecological Processes 2023年第1期12卷 193-203页

作者： Rishabh Kaushik Meesha Sharma ch.V.Ramana ch.Sasikala Maharaj K.Pandit Jealott’s Hill International Research Centre WarfieldBracknell RG426EYEnglandUK Department of Environmental Studies University of DelhiDelhi 110007India Department of Plant Sciences School of Life SciencesUniversity of HyderabadP.O.Central UniversityHyderabad 500046India Bacterial Discovery Laboratory Centre for EnvironmentInstitute of Science and TechnologyJ.N.T.University HyderabadKukatpallyHyderabad 500085India Jindal School of Environment&Sustainability OP Jindal Global UniversitySonipatHaryana 131001India

Background Soil microbial communities affect above-ground plant diversity and community composition by influencing plant growth *** studies have tested the effect of soil bacterial microbiome on growth performance of native and invasive plants,but the influence of specific bacterial isolates has not been ***,we investigated the effects of soil bacterial exclusion by soil sterilization and by inoculation of Streptomyces rhizobacterial isolates on the growth performance of native and invasive Prosopis *** Plant growth performance of invasive *** was significantly reduced when grown in sterilized soils,whereas native *** showed enhanced growth performance in the sterilized *** grown in the soil inoculated with the specific Streptomyces isolate from ***(PJ1),the growth performance of invasive *** was significantly enhanced while that of native *** seedlings was significantly ***,inoculation of *** and *** seedlings with Streptomyces isolate from the rhizosphere of native ***(PC1)had no significant effect on the growth performances either of *** or *** Our study reveals that invasive *** experiences positive feedback from the non-native soil bacterial community,while the native *** experiences negative feedback from its soil bacterial *** results provide fresh experimental evidence for the enemy release hypothesis,and further our understanding of the contrasting growth-promoting effects of differentially recruited microbial species belonging to the same genus(Streptomyces)in the rhizospheres of alien invasive and native plants.

关键词： Soil bacteria Streptomyces Invasive Prosopis juliflora Prosopis cineraria Soil microbiota

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Stochastic many-body calculations of moiréstates in twisted bilayer graphene at high pressures

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npj Computational Materials 2022年第1期8卷 89-98页

作者： Mariya Romanova Vojtěch Vlček Department of chemistry and Biochemistry University of CaliforniaSanta BarbaraCA93106-9510USA

We introduce three developments within the stochastic many-body perturbation theory:efficient evaluation of off-diagonal self-energy terms,construction of Dyson orbitals,and stochastic constrained random phase *** stochastic approaches readily handle systems with thousands of *** use them to explore the electronic states of twisted bilayer graphene(tBLG)characterized by giant unit cells and correlated electronic *** document the formation of electron localization under compression;weakly correlated states are merely shifted in *** demonstrate how to efficiently downfold the correlated subspace on a model Hamiltonian with a screened frequency-dependent two-body *** the 6°tBLG system,the onsite interactions are between 200 and 300 meV under *** Dyson orbitals exhibit spatial distribution similar to the mean-field single-particle *** pressure,the electron-electron interactions increase in the localized states;however,the dynamical screening does not fully balance the dominant bare Coulomb interaction.

关键词： interaction twisted stochastic

Phase Evolution during the Sintering of Submicron Ti(C,N)-Based Cermets

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Rare Metals 2001年第4期20卷 248-254页

作者： Li, ch Xiong, WH Yu, LX Huazhong Univ Sci & Technol State Key Lab Plast Forming Simulat & Die & Mould Wuhan 430074 Peoples R China

The submicron powder mixtures of TiC-TiN-WC-Mo-C-Ni sintered at 1400degreesC or below in vacuum were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses. The results showed that Mo2C formed at 800degreesC or below. Both WC and Mo2C disappeared at 1200degreesC, and TiN disappeared at 1250degreesC. In addition, the variations of lattice constants of the titanium carbonitride and nickel binder phase with sintering temperature were experimentally obtained, and the reason was analyzed.

关键词： submicron cermet phase sintering