检索结果-南通市图书馆

Assessment of aerobic biodegradation of lower-chlorinated benzenes in contaminated groundwater using field-derived microcosms and compound-specific carbon isotope fractionation

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 2022年第8期34卷 204-213页

作者： Alba Trueba-Santiso Jordi Palau Jesica M.Soder-Walz teresa Vicent Ernest Marco-Urrea Department of Chemical Biological and Environmental EngineeringUniversitat Autonoma de Barcelona(UAB)08193 BellaterraSpain MAiMA group SGR Applied MineralogyGeochemistry and GeomicrobiologyDepartment of MineralogyPetrology and Applied GeologyFaculty of Earth SciencesUniversitat de Barcelona(UB)MartiFranques s/n08028 BarcelonaSpain

Biodegradation of lower chlorinated benzenes(tri-, di-and monochlorobenzene) was assessed at a coastal aquifer contaminated with multiple chlorinated aromatic hydrocarbons. Field-derived microcosms, established with groundwater from the source zone and amended with a mixture of lower chlorinated benzenes, evidenced biodegradation of monochlorobenzene(MCB) and 1,4-dichlorobenzene(1,4-DCB) in aerobic microcosms,whereas the addition of lactate in anaerobic microcosms did not enhance anaerobic reductive dechlorination. Aerobic microcosms established with groundwater from the plume consumed several doses of MCB and concomitantly degraded the three isomers of dichlorobenzene with no observable inhibitory effect. In the light of these results, we assessed the applicability of compound stable isotope analysis to monitor a potential aerobic remediation treatment of MCB and 1,4-DCB in this site. The carbon isotopic fractionation factors(ε) obtained from field-derived microcosms were-0.7‰ ± 0.1 ‰ and-1.0‰ ± 0.2 ‰ for MCB and1,4-DCB, respectively. For 1,4-DCB, the carbon isotope fractionation during aerobic biodegradation was reported for the first time. The weak carbon isotope fractionation values for the aerobic pathway would only allow tracing of in situ degradation in aquifer parts with high extent of biodegradation. However, based on the carbon isotope effects measured in this and previous studies, relatively high carbon isotope shifts(i.e., Δδ13C > 4.0 ‰) of MCB or 1,4-DCB in contaminated groundwater would suggest that their biodegradation is controlled by anaerobic reductive dechlorination.

关键词： Groundwater Isotope fractionation Chlorobenzenes Aerobic biodegradation Anaerobic reductive dehalogenation Natural attenuation

Publishing in health communication journals

在线全文

学校读者我要写书评

暂无评论

International Journal of Nursing Sciences 2020年第S01期7卷 8-10页

作者： teresa L.Thompson Department of Communication University of DaytonDaytonOH45469-1410USA

As many of the readers of this short essay are likely to be young scholars attempting to establish their careers,my focus will be to share with you some thoughts about how to be successful in the publication part of this effort.I am the long-time(32 years!)editor of the journal Health Communication(HC)and have observed what is successful and what is not so successful as you attempt to publish in health communication journals.I cannot claim that my suggestions will be applicable to all health communication journals,but I suspect that many of them will be relevant to at least most such journals.

关键词： likely journal communication

Metrics for macroscale invasion and dispersal patterns

在线全文

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2018年第1期11卷 64-72页

作者： teresa L.Clark Basil V.IannoneⅢ Songlin Fei Department of Forestry and Natural Resources Purdue University715 W.State StreetWest LafayetteIN 47907USA School of Forest Resources and Conservation University of Florida1745 McCarty DriveGainesvilleFL 32611USA

Aim The ability to quantitatively measure the continuum of macroscale patterns of species invasion is a first step toward deeper understand-ing of their causal *** took advantage of two centuries worth of herbarium data,to evaluate a set of metrics to measure macroscale patterns,allowing cross-species comparisons of inva-sive expansion across large geographic *** We used herbarium specimens to reconstruct county-level invasion histories for two non-native plants(Alliaria petiolata and Lonicera japonica),with distinct spatiotemporal distribution patterns over the past two *** county centroids from species’ini-tial occurrences,we quantified point pattern metrics from multiple disciplines(*** crime analysis,landscape ecology etc.)that are historically used at smaller spatial scales,to evaluate their abil-ity to detect macroscale spatial diffusion and amount of directional *** were further assessed for their ease of use,data requirements,independence from other metrics and intuitiveness of *** Findings We identified four suitable metrics for distinguishing differences in spatial patterns:(i)standard distance,(ii)number of patches,(iii)Euclidean nearest neighbor summary class statistic coefficient of variation and(iv)mean center that when applied to county-level presence data allowed us to determine the directions by which distributions expanded and if distributions increased via outward expansion,infilling and/or jump dispersal *** metrics when compared during the same invasion phase are capable of quantifying macroscale variability among species in their distri-butional and dispersal *** able to quantify differences among species in these patterns is important in understanding the drivers of species dispersal *** metrics therefore repre-sent a simple yet thorough toolset for achieving this goal.

关键词： Alliaria petiolata diffusion herbarium jump dispersal Lonicera japonica plant invasions

Comparison and predicted equation of energy expenditure during walking or running among Caucasians,African Americans and Asians

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sports Medicine and Health Science 2021年第3期3卷 171-176页

作者： Xi Jin teresa Carithers Mark Loftin Nutrition and Hospitality Management The University of MississippiMSUSA Health Exercise Science and Recreation ManagementThe University of MississippiMSUSA

Knowledge of measured energy expenditure(EE)during walking and running is important for exercise ***,research on the EE comparison and EE predicted equation during walking or running among different ethnicities is *** purpose of the current study was to compare EE to walk or run 1 mile in Caucasian,African American and Asian adults and to develop a regression equation to predict EE to walk or run 1 *** hundred and twenty-four participants were included(71 Caucasians,68 African Americans and 85 Asians)with 3 groups(normal weight walking,overweight walking and running).EE was measured via indirect *** of variance was used to compare EE across *** regression analysis was employed for EE prediction,and the prediction equation was cross-validated.A significant EE difference was found between walking and running among three *** prediction equation was:EE=0.978 Body Weight-4.571 Gender(male=1;female=2)+3.524 Ethnicities(Caucasians=1,African Americans=2,Asians=3)+32.447(standard error of estimate=12.5 kcal·mile^(-1)).The equation was valid through cross-validation,so it is recommended to apply for calculating EE during walking or running 1 mile among Cauca-sians,African Americans and Asians.

关键词： Energy expenditure Predicted equation Caucasians African Americans Asians

Differential regulation of protein synthesis in skeletal muscle and liver of neonatal pigs by leucine through an mTORC1-dependent pathway

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 Animal Science and Biotechnology 2012年第1期3卷 32-41页

作者： Agus Suryawan Hanh V Nguyen Rosemarie D Almonaci teresa A Davis Department of Pediatrics Baylor College of Medicine United States Department of Agriculture/Agriculture Research Service Children's Nutrition Research Center 1100 Bates Street Houston TX 77030 USA

Neonatal growth is characterized by a high protein synthesis rate that is largely due to an enhanced sensitivity to the postprandial rise in insulin and amino acids, especially leucine. The mechanism of leucine＇s action in vivo is not well understood. In this study, we investigated the effect of leucine infusion on protein synthesis in skeletal muscle and liver of neonatal pigs. To evaluate the mode of action of leucine, we used rapamycin, an inhibitor of mammalian target of rapamycin （mTOR） complex-1 （mTORC1）. Overnight-fasted 7-day-old piglets were treated with rapamycin for 1 hour and then infused with leucine （400 μmol·kg^-1·h^-1） for 1 hour. Leucine infusion increased the rate of protein synthesis, and ribosomal protein S6 kinase 1 （S6K1） and eukaryotic initiation factor （elF） 4E-binding protein-1 （4E-BP1） phosphorylation in gastrocnemius and masseter muscles （P 〈 0.05）, but not in the liver. The leucine-induced stimulation of protein synthesis and S6K1 and 4E-BP1 phosphorylation were completely blocked by rapamycin, suggesting that leucine action is by an mTORC1-dependent mechanism. Neither leucine nor rapamycin had any effect on the activation of the upstream mTQRC1 regulators, AMP-activated protein kinase and protein kinase B, in skeletal muscle or liver. The activation of elF2α and elongation factor 2 was not affected by leucine or rapamycin, indicating that these two pathways are not limiting steps of leucine-induced protein synthesis. These results suggest that leucine stimulates muscle protein synthesis in neonatal pigs by inducing the activation of mTORC1 and its downstream pathway leading to mRNA translation.

关键词： leucine mTORC1 neonatal pigs rapamycin skeletal muscle

CRISPR/Cas system: An emerging technology in stem cell research

在线全文

学校读者我要写书评

暂无评论

World Journal of Stem Cells 2019年第11期11卷 937-956页

作者： Maria teresa Valenti Michela Serena Luca Dalle Carbonare Donato Zipeto Department of Medicine Section of Internal Medicine DUniversity of VeronaVerona 37134Italy Department of Biochemistry University of OxfordOxford OX13QUUnited Kingdom Department of Neurosciences Biomedicine and Movement SciencesLaboratory of Molecular BiologyVerona 37134Italy

The identification of new and even more precise technologies for modifying and manipulating the genome has been a challenge since the discovery of the DNA double *** ability to modify selectively specific genes provides a powerful tool for characterizing gene functions,performing gene therapy,correcting specific genetic mutations,eradicating diseases,engineering cells and organisms to achieve new and different functions and obtaining transgenic animals as models for studying specific *** regularly interspaced short palindromic repeats(CRISPR)/Cas9 technology has recently revolutionized genome *** application of this new technology to stem cell research allows disease models to be developed to explore new therapeutic *** possibility of translating new systems of molecular knowledge to clinical research is particularly appealing for addressing degenerative *** this review,we describe several applications of CRISPR/Cas9 to stem cells related to degenerative *** addition,we address the challenges and future perspectives regarding the use of CRISPR/Cas9 as an important technology in the medical sciences.

关键词： Gene editing CRISPR/Cas9 Stem cells Degenerative diseases

S-doped carbon aerogels/GO composites as oxygen reduction catalysts

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 Energy Chemistry 2016年第2期25卷 234-243页

作者： Mykola Seredych Krisztina László Enrique Rodríguez-Castellón teresa J.Bandosz The City College of New York and The Graduate Center of CUNY Department of Chemistry 160 Convent Avenue New York NY 10031 USA Department of Physical Chemistry and Materials Science Budapest University of Technology and Economics Budapest 1521 Hungary Departamento de Quimica Inorganica Universidad de Malaga Malaga 29071 Spain

Composites of carbon aerogel and graphite oxide（GO） were synthesized using a self-assembly method based on dispersive forces. Their surface was modified by treatment in hydrogen sulfide at 650 and800 ℃. The samples obtained were characterized by adsorption of nitrogen, TA-MS, XPS, potentiometric titration, and HRTEM and tested as catalysts for oxygen reduction reactions（ORR） in an alkaline *** synergistic effect of the composite（electrical conductivity, porosity and surface chemistry） leads to a good ORR catalytic activity. The onset potential for the composite of carbon aerogel heated at 800 ℃ is shifted to a more positive value and the number of electron transfer was 2e-at the potential 0.68 V versus RHE and it increased to 4e-with an increase in the negative values of the potential. An excellent tolerance to methanol crossover was also recorded.

关键词： Oxygen reduction reaction Carbon aerogel/GO composites Porosity Surface chemistry Specific interactions

Breast cancer metastasizing to the upper gastrointestinal tract(the esophagus and the stomach):A comprehensive review of the literature

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2023年第8期15卷 1332-1341页

作者： teresa Da Cunha David Restrepo Simon Abi-Saleh Murali Dharan Department of Gastroenterology and Hepatology University of Connecticut Health CenterFarmingtonCT 06030United States Department of Internal Medicine University of Connecticut Health CenterFarmingtonCT 06030United States

Breast cancer can infrequently metastasize to the upper gastrointestinal(GI)tract but the exact incidence is not well established-there is considerable variation between incidence reported from clinical studies and incidence noted in autopsy *** presentation can be very non-specific and often mimics primary gastrointestinal *** alone may not be sufficient to make a diagnosis and misdiagnosis is also common.A high degree of awareness and clinical suspicion is required to establish metastases to the upper GI *** undertook a comprehensive review of the available literature on breast cancer metastases to the esophagus and stomach including the clinical symptoms and presentation,endoscopic features,additional diagnostic imaging modalities,treatment and outcomes.

关键词： Metastatic breast cancer Esophagus Stomach Endoscopy

The unclear role of VEGF in POEMS syndrome: therapeutic implications of neoangiogenesis in a rare plasma cell disorder

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 Cancer Metastasis and Treatment 2021年第1期7卷 809-814页

作者： Gianfranco Lapietra Francesca Fazio Maria teresa Petrucci Hematology Department of Translational and Precision MedicineSapienza UniversityRome 00161Italy.

POEMS syndrome is a rare paraneoplastic disorder due to an underlying clone of aberrant plasma *** name POEMS is an acronym for some of the major disease manifestations,namely polyneuropathy,organomegaly,endocrinopathy,presence of monoclonal component,and skin *** clinical presentation can be various and could lead to delayed diagnosis and *** is known about the pathogenic mechanism,although the neoangiogenesis due to overproduction of vascular endothelial growth factor(VEGF)by plasma cells seems to play a key *** latest evidence suggests that the blood concentration of this cytokine correlates with the activity of the syndrome:VEGF could then be used as a therapeutic target and a marker to monitor *** case reports have shown the efficacy of this approach,but extended studies are required to better define the use of anti VEGF in patients affected by POEMS syndrome.

关键词： POEMS syndrome VEGF anti-VEGF plasma cell disorder