检索结果-南通市图书馆

Heating demand and economic feasibility analysis for year-round vegetable production in Canadian Prairies greenhouses

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Information Processing in Agriculture 2019年第1期6卷 81-90页

作者： md Shamim Ahamed Huiqing Guo lisa Taylor Karen Tanino Department of Farm Power and machinery Bangladesh Agricultural UniversityBangladesh Department of mechanical Engineering University of SaskatchewanCanada Department of Plant Sciences University of SaskatchewanCanada

Greenhouse vegetable production in Canadian Prairies is important for creating a sustainable regional food economy,especially in northern *** study included the estimation of heating demand for year-round production and evaluation of the economic feasibility of greenhouse vegetable production(tomato,cucumber,and pepper)in a conceptually designed greenhouse(0.6 ha)located in remote northern communities in Saskatchewan,*** heating simulation was based on a greenhouse heating simulation model(GREENHEAT)developed by the authors *** simulation results showed that the annual heating requirement for the production of tomato,cucumber,and pepper are 1486 mJ m^2,1657 mJ m^2,and 1754 mJ m^2,*** economic analysis indicates the net return(NR)from the production of tomato,cucumber,and pepper,are C$69.2/m^2(in Canadian dollar,CAD),C$41.5/m^2,and C$43.8/m^2,respectively,based on the market price C$3.5/kg,C$2.7/kg,and C$8.0/kg,and yields of 55.0 kg m^-2,65.0 kg m^-2,and 23.0 kg m^-*** net present value(NPV)for the tomato,cucumber,and pepper production are C$1.9 m,C$1.2 m,and C$1.1 m,respectively,and the benefit-cost ratio(BCR)are 1.38,1.21,and *** economic feasibility analysis indicates the year-round production of vegetables in a greenhouse at remote northern Saskatchewan would be economically profitable.

关键词： Northern latitudes Heating requirement Economic analysis Sensitivity analysis Year-round production

Association of cardiovascular system medications with cognitive function and dementia in older adults living in nursing homes in Australia

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 Geriatric Cardiology 2017年第6期14卷 407-415页

作者： Enwu Liu Suzanne m Dyer lisa Kouladjian O'Donnell Rachel milte Clare Bradley Stephanie L Harrison Emmanuel Gnanamanickam Craig Whitehead maria Crotty Department of Rehabilitation Aged and Extended Care Faculty of Medicine Nursing and Health Sciences School of Health Sciences Flinders University Daw Park Australia NHmRC Cognitive Partnership Centre The University of Sydney Sydney NSW Australia Kolling Institute of medical Research St Leonards NSW Australia and Sydney Medical School University of Sydney Sydney NSW Australia Institute for Choice University of South Australia GPO Box 2471 Adelaide SA Australia Infection & Immunity - Aboriginal Health SAHMRI PO Box 11060 Adelaide SA Australia

Objective To examine associations between cardiovascular system medication use with cognition function and diagnosis of dementia in older adults living in nursing homes in Australia. methods As part of a cross-sectional study of 17 Australian nursing homes examining quality of life and resource use, we examined the association between cognitive impairment and cardiovascular medication use （identified using the Anatomical Therapeutic Classification System） using general linear regression and logistic regression models. People who were receiving end of life care were excluded. Results Participants included 541 residents with a mean age of 85.5 years （± 8.5）, a mean Psychogeriatric Assessment Scale–Cognitive Impairment （PAS-Cog） score of 13.3 （± 7.7）, a prevalence of cardiovascular diseases of 44% and of hypertension of 47%. Sixty-four percent of participants had been diagnosed with dementia and 72% had received cardiovascular system medications within the previous 12 months. Regression models demonstrated the use of cardiovascular medications was associated with lower （better） PAS-Cog scores [Coefficient （β） = -3.7; 95% CI： -5.2 to -2.2; P 〈 0.0001] and a lower probability of a dementia diagnosis （OR = 0.44; 95% CI： 0.26 to 0.75, P = 0.0022）. Analysis by subgroups of medications showed cardiac therapy medications （C01）, beta blocking agents （C07）, and renin-angiotensin system agents （C09） were associated with lower PAS-Cog scores （better cognition） and lower dementia diagnosis probability. Conclusions This analysis has demonstrated an association between greater cardiovascular system medication use and better cognitive status among older adults living in nursing homes. In this population, there may be differential access to health care and treatment of cardiovascular risk factors. This association warrants further investigation in large cohort studies.

关键词： Cardiovascular agents Cognitive dysfunction Dementia Residential facilities

Ca^(2＋) involvement in activation of extracellular-signal- regulated-kinase 1/2 and m-calpain after axotomy of the sciatic nerve

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2017年第4期12卷 623-628页

作者： lisa B. martensson Charlotta Lindwall Blom Lars B. Dahlin Department of Translational medicine-Hand Surgery Lund UniversityMalmoSweden Cellectricon AB MolndalSweden Department of Hand Surgery Skane University HospitalMalmoSweden

Detailed mechanisms behind regeneration after nerve injury, in particular signal transduction and the fate of Schwann cells （SCs）, are poorly understood. Here, we investigated axotomy-induced activation of extracellular- signal-regulated kinase-1/2 （ERK1/2; important for proliferation） and m-calpain in vitro, and the relation to Ca2＋ deletion and Schwann cell proliferation and death after rat sciatic nerve axotomy. Nerve segments were cultured for up to 72 hours with and without ethylene glycol-bis（β-aminoethyl ether）- N,N,N＇,N＇-tetraacetic acid （EGTA）. In some experiments, 5-bromo-2′-deoxyuridine （BrdU） was added during the last 24 hours to detect proliferating cells and propidium iodide （PI） was added at the last hour to detect dead and/or dying cells. Immunohistochemistry of sections of the cultured nerve segments was performed to label m-calpain and the phosphorylated and activated form of ERK1/2. The experiments revealed that immunoreactivity for p-ERK1/2 increased with time in organotypically cultured SCs. p-ERK1/2 and m-calpain were also observed in axons. A significant increase in the number of dead or dying SCs was observed in nerve segments cultured for 24 hours. When deprived of Ca2＋, activation of axonal m-calpain was reduced, whereas p-ERK1/2 was increased in SCs. Ca2＋ deprivation also significantly reduced the number of proliferating SCs, and instead increased the number of dead or dying SCs. Ca2＋ seems to play an important role in activation of ERK1/2 in SCs and in SC survival and proliferation. In addition, extracellular Ca2＋ levels are also required for m-calpain activation and up-regulation in axons. Thus, regulation of Ca2＋ levels is likely to be a useful method to promote SC proliferation.

关键词： nerve regeneration p-ERK1/2 m-calpain nerve injury signal transduction cell proliferation cell death activation axotomy sciatic nerve neural regeneration

Delineation of homogeneous forest patches using combination of field measurements and LiDAR point clouds as a reliable reference for evaluation of low resolution global satellite data

在线全文

学校读者我要写书评

暂无评论

Forest Ecosystems 2018年第1期5卷 1-12页

作者： krzysztof stereńczak marek lisańczuk yousef erfanifard department of forest resources management forest research instituteSekocin Stary 3 Braci Lesnej，05-090 Raszyn，Poland department ofnatural resources and environment college of agriculture shiraz universityp.o.box ***shiraziran

Backgrounds： There are many satellite systems acquiring environmental data on the world. Acquired global remote sensing datasets require ground reference data in order to calibrate them and assess their quality. Regarding calibration and validation of these datasets with broad geographical extents, it is essential to register zones which might be considered as Homogeneous Patches （HPs）. Such patches enable an optimal calibration of satellite data/sensors, and what is more important is an analysis of components which significantly influence electro-magnetic signals registered by satellite sensors. methods： We proposed two structurally different methods to identify HPs： predefined thresholding-based one （static one）, and statistical thresholding-based technique （dynamic one）. In the first method, 3 different thresholds were used： 5%, 10%, and 20%. Next, it was aimed to assess how delineated HPs were spatially matched to satellite data with coarse spatial resolution. Selected cell sizes were 25, 50, 100, 250, and 500 m. The number of particular grid cells which almost entirely fell into registered HPs was counted （leaving 2% cell area tolerance level）. This procedure was executed separately for each variant and selected structural variables, as well as for their intersection parts. Results： The results of this investigation revealed that ALS data might have the potential in the identification of HPs of forest stands. We showed that different ALS based variables and thresholds of HPs definition influenced areas which can be treated as similar and homogeneous. We proved that integration of more than one structural variable limits size of the HPs, in contrast, visual interpretation revealed that inside such patches vegetation structure is more constant. Conclusions： We concluded that ALS data can be used as a potential source of data to ＂enlarge＂ small ground sample plots and to be used for evaluation and calibration of remotely sensed datasets provided by global systems

关键词： Forest structure Stratification Global satellite missions

在线全文

学校读者我要写书评

暂无评论

情绪自控力

microfluidics for interrogating live intact tissues

2018年

作者： (美) 丽萨·m.萨伯 (lisa m. Schab)

来源：南通市图书馆图书评论

学校读者我要写书评

暂无评论

microsystems & Nanoengineering 2020年第1期6卷 538-564页

作者： lisa F.Horowitz Adan D.Rodriguez Tyler Ray Albert Folch Department of Bioengineering University of WashingtonSeattleWA 98195USA Department of mechanical Engineering University of Hawaiʻi at MānoaHonoluluHI 96822USA

The intricate microarchitecture of tissues–the“tissue microenvironment”–is a strong determinant of tissue *** offers an invaluable tool to precisely stimulate,manipulate,and analyze the tissue microenvironment in live tissues and engineer mass transport around and into small tissue *** control is critical in clinical studies,especially where tissue samples are scarce,in analytical sensors,where testing smaller amounts of analytes results in faster,more portable sensors,and in biological experiments,where accurate control of the cellular microenvironment is *** also provides inexpensive multiplexing strategies to address the pressing need to test large quantities of drugs and reagents on a single biopsy specimen,increasing testing accuracy,relevance,and speed while reducing overall diagnostic ***,we review the use of microfluidics to study the physiology and pathophysiology of intact live tissues at sub-millimeter *** categorize uses as either in vitro studies–where a piece of an organism must be excised and introduced into the microfluidic device–or in vivo studies–where whole organisms are small enough to be introduced into microchannels or where a microfluidic device is interfaced with a live tissue surface(*** skin or inside an internal organ or tumor)that forms part of an animal larger than the *** microfluidic systems promise to deliver functional measurements obtained directly on intact tissue–such as the response of tissue to drugs or the analysis of tissue secretions–that cannot be obtained otherwise.

关键词： fluid drugs testing

Lipogenic effects of androgen signaling in normal and malignant prostate

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Urology 2020年第3期7卷 258-270页

作者： Chui Yan mah Zeyad D.Nassar Johannes V.Swinnen lisa m.Butler Adelaide medical School and Freemasons Foundation Centre for men’s Health University of AdelaideAdelaideAustralia South Australian Health and medical Research Institute AdelaideAustralia KU Leuven-University of Leuven LKI-Leuven Cancer InstituteDepartment of OncologyLaboratory of Lipid Metabolism and CancerLeuvenBelgium

Prostate cancer is an androgen-dependent cancer with unique metabolic features compared to many other solid tumors,and typically does not exhibit the“Warburg effect”.During malignant transformation,an early metabolic switch diverts the dependence of normal prostate cells on aerobic glycolysis for the synthesis of and secretion of citrate towards a more energetically favorable metabolic phenotype,whereby citrate is actively oxidised for energy and biosynthetic processes(*** novo lipogenesis).It is now clear that lipid metabolism is one of the key androgen-regulated processes in prostate cells and alterations in lipid metabolism are a hallmark of prostate cancer,whereby increased de novo lipogenesis accompanied by overexpression of lipid metabolic genes are characteristic of primary and advanced *** recent advances in our understanding of altered lipid metabolism in prostate tumorigenesis and cancer progression,the intermediary metabolism of the normal prostate and its relationship to androgen signaling remains poorly *** this review,we discuss the fundamental metabolic relationships that are distinctive in normal versus malignant prostate tissues,and the role of androgens in the regulation of lipid metabolism at different stages of prostate tumorigenesis.

关键词： Androgen receptor Fatty acids metabolism Phospholipids Prostate gland

Chronotropic incompetence is more frequent in obese adolescents and relates to systemic inflammation and exercise intolerance

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 Sport and Health Science 2023年第2期12卷 194-201页

作者： Wouter m.A.Franssen Charly Keytsman Nastasia marinus Kenneth Verboven Bert O.Eijnde lisa van Ryckeghem Paul Dendale Renate Zeevaert Guy massa Dominique Hansen Rehabilitation Research Centre(REVAL) Faculty of Rehabilitation SciencesHasselt UniversityHasselt 3500Belgium Biomedical Research Institute(BIOmED) Faculty of Medicine and Life SciencesHasselt UniversityHasselt 3500Belgium ADLON Sports medical Center Hasselt 3500Belgium Heart Centre Hasselt Jessa HospitalHasselt 3500Belgium Department of Pediatric Endocrinology and Diabetology Jessa HospitalHasselt 3500Belgium

Background:Adults with obesity may display disturbed cardiac chronotropic responses during cardiopulmonary exercise testing,which relates to poor cardiometabolic health and an increased risk for adverse cardiovascular *** is unknown whether cardiac chronotropic incompetence(CI)during maximal exercise is already present in obese adolescents and,if so,how that relates to cardiometabolic ***:Sixty-nine obese adolescents(body mass index standard deviation score=2.23±0.32,age=14.1±1.2 years;mean±SD)and 29lean adolescents(body mass index standard deviation score=-0.16±0.84,age=14.0±1.5 years)performed a maximal cardiopulmonary exercise testing from which indicators for peak performance were *** resting heart rate and peak heart rate were used to calculate the maximal chronotropic response ***(lipid profile,glycemic control,inflammation,and leptin)was studied in fasted blood samples and during an oral glucose tolerance test within obese *** analyses were applied to examine associations between the presence of CI and blood or exercise capacity parameters,respectively,within obese ***:CI was prevalent in 32 out of 69 obese adolescents(46%)and 3 out of 29 lean adolescents(10%).C-reactive protein was significantly higher in obese adolescents with CI compared to obese adolescents without CI(p=0.012).Furthermore,peak oxygen uptake and peak cycling power output were significantly reduced(pmore common in the current cohort of obese adolescents,and is related to systemic inflammation and exercise intolerance.

关键词： Adolescents Cardiometabolic health Exercise tolerance Heart rate Obesity

A framework for considering ecological interactions for common non-timber forest product species:a case study of mountain date palm(Phoenix loureiroi Kunth)leaf harvest in South India

在线全文

学校读者我要写书评

暂无评论

Ecological Processes 2013年第1期2卷 212-220页

作者： lisa mandle Tamara Ticktin Snehlata Nath Siddappa Setty Anita Varg Botany Department University of Hawai'i at MānoaMānoaHawai'iUSA Ecology Evolution and Conservation Biology ProgramUniversity of Hawai'i at MānoaMānoaHawai'iUSA Keystone Foundation KotagiriTamil NaduIndia Ashoka Trust for Research in Ecology and the Environment BangaloreKarnatakaIndia Natural Capital Project Woods Institute for the EnvironmentStanford UniversityStanfordCAUSA.

Introduction:many economically important non-timber forest products(NTFPs)come from widespread and common plant *** of these species often is assumed to be sustainable due to their ***,because of the ecological roles of common species,harvest may affect and be affected by ecological interactions at broader scales,which are rarely considered when evaluating the sustainability of *** use a case study of the mountain date palm(Phoenix loureiroi Kunth),harvested in South India to produce brooms,to present a conceptual framework illustrating how intensive harvest of a common species interacts with other anthropogenic management practices,plant-animal interactions and surrounding environmental ***:We apply this framework to understanding the impacts of mountain date palm harvest in the southern Western Ghats regions of the Indian states of Tamil Nadu and *** integrate data on the extent and levels of commercial harvest,local management practices,the ecological context in which harvest occurs,and research on harvest *** use this information to document the intensity and extent of mountain date palm harvest in the study area,identify the ecological implications of harvest,and demonstrate how a framework that considers harvest in the context of ecological communities and ecosystems is important for assessing the impacts of harvest of common NTFP ***:We show that mountain date palm leaves are heavily harvested from natural areas in the southern Western Ghats but that harvest levels have declined in recent *** date palm management and harvest occur within a network of ecological interactions,linking human activities to population-,community-,and ecosystem-level *** demonstrate that understanding the effects of return interval of anthropogenic fire,herbivory by wild animals and livestock,as well as the light environment in which harvest occurs are critical to assessing the sustainab

关键词： Non-timber forest product(NTFP) Western Ghats Savanna woodland Resource management Plant-animal interactions Fire Herbivory