检索结果-南通市图书馆

Journal of Health Science 2014年第11期2卷 523-528页

作者： Samira Green Vanessa Jessop Jason Pott Tim harris University Hospitals Leicester Leicester LE1 5WW UK Royal London Hospital London E1 1BB UK

Chest pain accounts for 700,000 hospital attendances in the UK each year. Prompt risk assessment and diagnosis both improves outcomes and reduces unnecessary admissions. data on patients who presented to the Ed with chest pain was collected retrospectively. Patients were then followed up via hospital records and telephone. 70% of the authors＇ patients were triaged as low risk chest pain. Three represented within 30 d with non ischaemic chest pain. 1 patient had MACE. The authors＇ triage pathway safely managed those presenting with chest pain.

关键词： Acute coronary syndrome triage near patient testing troponin I risk stratification.

构巢曲霉pyrG在维持胞内尿嘧啶稳态中起关键作用

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

构巢曲霉pyrG在维持胞内尿嘧啶稳态中起关键作用

Vitamin A administration at birth promotes calf growth and intramuscular fat development in Angus beef cattle

2012年中国菌物学会学术年会

作者： Steven d.harris department of Plant Pathology University of Nebraska-LincolnLincolnNebraska 68588-0660United States of America

＜正＞Tight control of intracellular uracil level is believed to be important for reducing the occurrence of uracil incorporation into *** this study,we found that orotidine 5’-phosphate decarboxylase,which catalyzes the conversion of orotidine monophosphate（OMP） to uridine monophosphate（UMP）,is critical for maintaining uracil at a low concentration in cells in the presence of exogenous uracil in Aspergillus *** exogenous uracil and its derivatives had more inhibitory effects on the growth of OMP decarboxylase mutants than the wild type,and induced sexual development in the OMP decarboxylase mutants but not the wild *** of transcriptomic responses to excessive exogenous uracil by digital gene expression profiling（dGE） revealed that genes related to sexual development were transcriptionally activated in the OMP decarboxylase mutants but not in the wild type. Quantitative analysis by HPLC showed that the cellular uracil level is 6.5 times higher than that of the wild type in the presence of exogenous *** addition,we found that sorbitol,sucrose and glucose at high concentrations have an OMP decarboxylase-dependent inhibitory effect on A. nidulans ***,this study not only provides new information on uracil recycling and the adaptation to excessive uracil but also reveals the potential effects of OMP decarboxylase on fungal growth and development.

关键词： Aspergillus nidualans orotidine 5’-phosphate decarboxylase pyrG uracil sexual development

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2018年第4期9卷 991-999页

作者： Corrine L.harris Bo Wang Jeneane M.deavila Jan R.Busboom Martin Maquivar Steven M.Parish Brent McCann Mark L.Nelson Min du department of Animal Sciences Washington State University State Key Laboratory of Animal Nutrition College of Animal Science and Technology China Agricultural University College of Veterinary Medicine Washington State University

Background: Marbling, or intramuscular fat, is an important factor contributing to the palatability of beef. Vitamin A, through its active metabolite, retinoic acid, promotes the formation of new fat cells(adipogenesis). As intramuscular adipogenesis is active during the neonatal stage, we hypothesized that vitamin A administration during the neonatal stage would enhance intramuscular adipogenesis and ***: Angus steer calves(n = 30), in a completely randomized design, were randomly allotted to three treatment groups at birth, receiving 0, 150,000, or 300,000 IU of vitamin A at both birth and one month of age.A biopsy of the biceps femoris muscle was collected at two months of age. After weaning at 210 d of age, steers were fed a backgrounding diet in a feedlot until 308 d of age, when they were transitioned to a high concentrate finishing diet and implanted with trenbolone/estradiol/tylosin mixture. Steers were harvested at an average of 438 d of age. All diets were formulated to meet nutrient ***: Weaning weight and weight during the backgrounding phase were linearly increased(P difference in body weight was observed at harvest. Intramuscular fat of steers at 308 d of age, measured by ultrasound, quadratically increased(P dratically increased(P dministration of vitamin A at birth increased weaning weight and enhanced marbling fat ***, vitamin A administration provides a practical method for increasing marbling and early growth of beef cattle.

关键词： Beef Calf Cattle Marbling fat Quality Vitamin A

Engineering and characterization of dehalogenase enzymes from delftia acidovorans in bioremediation of perfluorinated compounds

在线全文

学校读者我要写书评

暂无评论

Synthetic and Systems Biotechnology 2022年第2期7卷 683-688页

作者： Jackson d.harris Collin M.Coon Megan E.doherty Eamon A.McHugh Margaret C.Warner Conley L.Walters Olivia M.Orahood Abigail E.Loesch david C.Hatfield John C.Sitko Erin A.Almand J.Jordan Steel department of Biology United Stated Air Force AcademyColorado SpringsCO80840USA department of Biochemistry United States Air Force AcademyColorado SpringsCO80840USA department of Civil Engineering United States Air Force AcademyColorado SpringsCO80840USA

Per-and Polyfluorinated alkyl substances(PFAS)are a broad class of synthetic compounds that have fluorine substituted for hydrogen in several or all locations and are globally categorized as PFCs(perfluorochemicals;commonly called fluorinated chemicals).These compounds have unique chemical and physical properties that enable their use in non-stick surfaces,fire-fighting efforts,and as slick ***,recent concerns over the health effects of such compounds,specifically perfluorooctanoic acid and perfluorooctane sulfonic acid(PFOA,PFOS;PFOA/S),have led to increased attention and research by the global community into degradation *** this study,soil samples from PFAS-contamination sites were cultured and screened for microbes with PFOA/S degradation potential,which led to the identification of delftia *** was found that *** isolated from PFAS-contaminated soils was capable of growth in minimal media with PFOA as a sole carbon resource,and an observable fluoride concentration increase was observed when cells were exposed to *** suggests potential activity of a dehalogenase enzyme that may be of use in PFOA or PFAS microbial remediation *** associated haloacid dehalogenases have been identified in the *** genome and have been engineered for expression in Escherichia coli for rapid production and *** enzymes have shown potential for enzymatic defluorination,a significant step in biological degradation and removal of PFOA/S from the *** hypothesize that bioremediation of PFAS using naturally occurring microbial degradation pathways may represent a novel approach to remove PFAS contamination.

关键词： iGEM PFAS Bioremediation Bioengineering delftia acidovorans

dETERMINATION OF MOLECULAR CRYSTAL STRUCTURES ON A LABORATORY POWdER dIFFRACTOMETER

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

DETERMINATION OF MOLECULAR CRYSTAL STRUCTURES ON A LABORATOR...

Sixteenth Congress of the International Union of Crystallography

作者： P.Lightfoot M.Tremayne K.d.M.harris P.G.Bruce department of Chemistry University of St AndrewsSt AndrewsFifeScotland

＜正＞Many problems in materials chemistry require detailed structural information about the materials under *** such information has been obtained by single crystal X-ray diffraction, however,many materials cannot be obtained in single crystal form. In recent years it has been shown that simple crystal structures can be determined ab initio by powder diffraction techniques,often at a

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

关于使用样线法估计种群密度

动物学报 2002年第6期48卷 812-818页

作者： Richard B.harris Kenneth P.BURNHAM University of Montana Colorado State University Missoula MT 59812 USAFort Collins CO 80523 USA

样线法是在大范围内估计野生动物种群密度的优良方法之一。我们在本文中说明了使用以平均垂直距离作为有效样带宽度来计算种群密度的简单数学公式一般不会得到可靠的结果。即使野外实施方式正确 ,使用该数学计算式估计出的密度结果也往... 详细信息

样线法是在大范围内估计野生动物种群密度的优良方法之一。我们在本文中说明了使用以平均垂直距离作为有效样带宽度来计算种群密度的简单数学公式一般不会得到可靠的结果。即使野外实施方式正确 ,使用该数学计算式估计出的密度结果也往往过于偏高。因此 ,我们建议最好使用计算机软件dISTANCE调查野生动物种群密度 ,并能熟悉样线距离取样法的理论基础。

关键词：样线法估计种群密度探测函数傅立叶级数负指数函数计算机软件 dISTANCE 野生动物

在线全文

学校读者我要写书评

暂无评论

多点养猪体系的管理

当代畜禽养殖业 2003年第9期 17-21页

作者： d．L．harris 王永康不详上海市畜牧兽医站

管理者负责着多点体系全面的生产性能或效率。为了判断养猪场的财务状况,场主或场主兼管理者必须考虑三个因素,即效率、生产规模和债务结构。效率是管理者和场主管理技巧的直接反映。低效率并非是财务状况低下的唯一原因,但优异的生产... 详细信息

管理者负责着多点体系全面的生产性能或效率。为了判断养猪场的财务状况,场主或场主兼管理者必须考虑三个因素,即效率、生产规模和债务结构。效率是管理者和场主管理技巧的直接反映。低效率并非是财务状况低下的唯一原因,但优异的生产成绩则是取得令人满意的利润和资金流动的基本所在。

关键词：猪养殖体系日常管理生产性能工作效率生产规模债务结构

Maternal Supplementation of Vitamin d during Lactation to Support Infant Vitamin d Needs: A Systematic Review

在线全文

学校读者我要写书评

暂无评论

Open Journal of Pediatrics 2018年第3期8卷 255-272页

作者： Kelly Schossow Alena M. Clark Mary A. harris Jefferson County Public Health Lakewood CO USA department of Nutrition and dietetics University of Northern Colorado Greeley CO USA department of Food Science and Human Nutrition Colorado State University Fort Collins CO USA

Human milk is generally considered to be insufficient in vitamin d. However, research completed in the 1980s showed that the vitamin d content of human milk is directly related to maternal serum vitamin d levels and therefore may potentially be adequate if the mother’s vitamin d levels are sufficient. Approximately one-third of the adult population, which includes breastfeeding women, in the United States have vitamin d insufficiency or deficiency. Among infants, 90.4% of breastfed infants are vitamin d deficient compared to 15.4% of formula fed infants. The American Academy of Pediatrics (AAP) has therefore recommended all breastfed infants be directly supplemented with 400 IU per day of vitamin d to decrease the risk of vitamin d insufficiency and rickets. According to the AAP, compliance rates with this recommendation ranges between 2% - 36%. Because the recommendation to supplement may undermine breastfeeding, many pediatricians do not inform their patients of the need to supplement. Additionally, some parents are concerned about directly supplementing their infant as risks may include allergic reactions to the ingredients, aspiration pneumonia, accidental overdose, and changes in intestinal flora and pH which may compromise the immune benefits of human milk. A literature review was conducted to examine the effect of maternal supplementation with vitamin d during lactation on human milk vitamin d content and maternal and infant serum vitamin d levels. Although there is no current consensus regarding dosage and timing of maternal vitamin d supplementation, the literature suggests that high-dose vitamin d supplementation of the lactating mother is as effective at maintaining infant vitamin d levels as direct infant supplementation, while also correcting the mother’s vitamin d deficiency.

关键词： vitamin d vitamin supplements infant breastfeeding human milk

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

声光光子开关

国外激光 1990年第11期 27-27,37,7页

作者： d.O.harris A.Vanderlugt 从征

近几年,人们已对发展光子开关发生了兴趣。有希望的一类空间分割结构以光束动态控制为基础,即输入光被偏转到几个输出通道中的某一个。这种结构使用三维光学处理能力,允许非阻挡 N×N开关只用 N 个偏转器制作。由于光只与一个偏转器相遇... 详细信息

近几年,人们已对发展光子开关发生了兴趣。有希望的一类空间分割结构以光束动态控制为基础,即输入光被偏转到几个输出通道中的某一个。这种结构使用三维光学处理能力,允许非阻挡 N×N开关只用 N 个偏转器制作。由于光只与一个偏转器相遇,与输出通道数无关,因此除硬件不太复杂外,开关的损耗可能很低(甚至大型开关也如此)。

关键词：声光开关声光光子开关声光器件

在线全文

学校读者我要写书评

暂无评论

日粮、光照和配种时间对家兔生产性能的影响

草食家畜 1984年第1期 48-49页

作者： d.J.harris 何世山

作者进行了12个月的试验,以研究家兔生产的三个方面。(1)长期饲喂苜蓿含量高的日粮对母兔及仔兔的影响,并与饲喂商品饲料的进行比较;(2)对产后1天复配和产后14天复配的家兔作一比较;(3)人工光照对家兔生产性能的影响,并与自然光照下的... 详细信息

作者进行了12个月的试验,以研究家兔生产的三个方面。(1)长期饲喂苜蓿含量高的日粮对母兔及仔兔的影响,并与饲喂商品饲料的进行比较;(2)对产后1天复配和产后14天复配的家兔作一比较;(3)人工光照对家兔生产性能的影响,并与自然光照下的家兔相比较。试验结果表明,喂给家兔54％苜蓿日粮具有与饲喂商品饲料相同或更好的效果。从断奶仔兔总数看,产后1天复配并不比产后14天复配的好,在人工光照下产仔数和断奶仔兔数比自然光照的有所增加。

关键词：仔兔日粮母兔家兔窝产仔数多胎性光照繁殖性能生产性能