检索结果-南通市图书馆

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

生命起源的七条线索 1版

丛书名：科学与人译丛

1995年

作者：（英）A.G.凯恩斯-史密斯（A.G.cairns-Smith）段吉勇译

生命起源的七条线索本书以侦探故事的风格论述了地球生命的起源问题。作者在叙述生命起源的难点时，运用福尔摩斯式的破案方法，一步步将读者引入生物学、地质学等科学领域，寻找生命起源的线索，使读者在轻松愉快的气氛中尽情领略科学... 详细信息

ISBN: (数字)7500103565

ISBN: (纸本)7500103565

生命起源的七条线索本书以侦探故事的风格论述了地球生命的起源问题。作者在叙述生命起源的难点时，运用福尔摩斯式的破案方法，一步步将读者引入生物学、地质学等科学领域，寻找生命起源的线索，使读者在轻松愉快的气氛中尽情领略科学的奥妙。作者在归纳分析他人之见的基础上系统地提出了自己的观点，论据翔实，说服力强，给读者留下深刻的印象。凡是热爱自然科学，关心地球生命起源的人，只要具备初步的生化知识，就可以读懂这本书。本书对专业工作者也会有一定的参考作用。

关键词：生命起源学科:普及读物

来源：汇雅图书（南通市图书馆... 评论

在线全文

汇雅图书（南通市图书馆）

学校读者我要写书评

暂无评论

专家指导

影像视觉 2014年第2期15卷 91-95页

作者：王雷 Geoff Harris Angela Nicholson Chris Rutter George cairns 《影像视觉》专家团队

我非常喜欢你们最近那期关于戏剧化风景照的专题，特别是拍摄暴风雨的天空。我总是纠结于如何测光。有什么技巧吗？Geoff的回答：矩阵测光模式或称评价测光模式在大多数场景下都非常有效，但对于暴风雨的天空这类风景照确实是一个不小... 详细信息

我非常喜欢你们最近那期关于戏剧化风景照的专题，特别是拍摄暴风雨的天空。我总是纠结于如何测光。有什么技巧吗？Geoff的回答：矩阵测光模式或称评价测光模式在大多数场景下都非常有效，但对于暴风雨的天空这类风景照确实是一个不小的挑战。特别是当乌云压顶、整个场景被透射过来的散碎阳光所照亮时，曝光就更加困难了。

关键词： Photo 专家照片摄影测光模式暴风雨风景场景

Redesigning crop varieties to win the race between climate change and food security

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2023年第10期16卷 1590-1611页

作者： Kevin V.Pixley Jill E.cairns Santiago Lopez-Ridaura Chris O.Ojiewo Maryam Abba Dawud Inoussa Drabo Taye Mindaye Baloua Nebie Godfrey Asea Biswanath Das Happy Daudi Haile Desmae Benoit Joseph Batieno Ousmane Boukar Clare T.M.Mukankusi Stanley T.Nkalubo Sarah J.Hearne Kanwarpal S.Dhugga Harish Gandhi Sieglinde Snapp Ernesto Adair Zepeda-Villarreal International Maize and Wheat Improvement Center(CIMMYT) TexcocoMexico International Maize and Wheat Improvement Center(CIMMYT) HarareZimbabwe International Maize and Wheat Improvement Center(CIMMYT) NairobiKenya Lake Chad Research Institute(LCRI) MaidiguriNigeria International Maize and Wheat Improvement Center(CIMMYT) DakarSenegal Ethiopian Institute of Agricultural Research(EIAR) Addis AbabaEthiopia National Agricultural Research Organization(NARO) KampalaUganda Tanzania Agricultural Research Institute(TARI) NaliendeleTanzania Institut de l'Environnement et de Recherches Agricoles(INERA) OuagadougouBurkina Faso International Institute of Tropicl Agriculture(IITA) KanoNigeria Alliance of Bioversity International and CIAT KampalaUganda

Climate change poses daunting challenges to agricultural production and food *** temperatures,shifting weather patterns,and more frequent extreme events have already demonstrated their effects on local,regional,and global agricultural *** varieties that withstand climate-related stresses and are suitable for cultivation in innovative cropping systems will be crucial to maximize risk avoidance,productivity,and profitability under climate-changed *** surveyed 588 expert stakeholders to predict current and novel traits that may be essential for future pearl millet,sorghum,maize,groundnut,cowpea,and common bean varieties,particularly in sub-Saharan *** then review the current progress and prospects for breeding three prioritized future-essential traits for each of these *** predict that most current breeding priorities will remain important,but that rates of genetic gain must increase to keep pace with climate challenges and consumer ***,the predicted future-essential traits include innovative breeding targets that must also be prioritized;for example,(1)optimized rhizosphere microbiome,with benefits for P,N,and water use efficiency,(2)optimized performance across or in specific cropping systems,(3)lower nighttime respiration,(4)improved stover quality,and(5)increased early *** further discuss cutting-edge tools and approaches to discover,validate,and incorporate novel genetic diversity from exotic germplasm into breeding populations with unprecedented precision,accuracy,and *** conclude that the greatest challenge to developing crop varieties to win the race between climate change and food security might be our innovativeness in defining and boldness to breed for the traits of tomorrow.

关键词： climate change food security crop breeding cropping systems expert survey sub-Saharan Africa

Burn recidivism:a 10-year retrospective study characterizing patients with repeated burn injuries at a large tertiary referral burn center in the United States

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Burns & Trauma 2019年第1期7卷 75-84页

作者： Sarah L.Laughon Bradley N.Gaynes Lori P.Chrisco Samuel W.Jones Felicia N.Williams Bruce A.cairns Gary J.Gala Department of Psychiatry 101 Manning DriveCB#7160Chapel HillNC 27599-7160USA Department of Surgery 4001 Burnett-Womack BuildingCB#7050Chapel HillNC 27599-7050USA North Carolina Jaycee Burn Center 101 Manning DriveCB#7206Chapel HillNC 27599-7600USA

Background:Psychiatric and substance use disorders are common among trauma and burn patients and are known risk factors for repeat episodes of trauma,known as trauma *** epidemiology of burn recidivism,specifically,has not been *** study aimed to characterize cases of burn recidivism at a large US tertiary care burn center and compare burn recidivists(RCs)with non-recidivists(NRCs).Methods:A 10-year retrospective descriptive cohort study of adult burn patients admitted to the North Carolina Jaycee Burn Center was conducted using data from an electronic burn registry and the medical *** variables were reported using medians and interquartile ranges(IQR).Chi-square and Wilcoxon-Mann-Whitney tests were used to compare demographic,burn,and hospitalization characteristics between NRCs and ***:A total of 7134 burn patients were admitted,among which 51(0.7%)were RCs and accounted for 129(1.8%)*** the 51 RCs,37 had two burn injuries each,totaling 74 admissions as a group,while the remaining 14 RCs had between three and eight burn injuries each,totaling 55 admissions as a *** to NRCs,RCs were younger(median age 36 years vs.42 years,p=0.02)and more likely to be white(75%vs.60%,p=0.03),uninsured(45%vs.30%,p=0.02),have chemical burns(16%vs.5%,p<0.0001),and have burns that were≤10%total body surface area(89%vs.76%,p=0.001).The mortality rate for RCs *** did not differ(0%vs.1.2%,p=0.41).Psychiatric and substance use disorders were approximately five times greater among RCs compared to NRCs(75%vs.15%,p<0.001).Median total hospital charges per patient were nearly three times higher for RCs ***($85,736 vs.$32,023,p<0.0001).Conclusions:Distinct from trauma recidivism,burn recidivism is not associated with more severe injury or increased *** to trauma recidivists,but to a greater extent,burn RCs have high rates of comorbid psychiatric and medical conditions that contribute to increased health care u

关键词： Burn recidivism Consult psychiatry Substance use disorder Repeat burn injury

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

用鱼类的呼吸频率检测长期安全毒性浓度

水产科技情报 1988年第6期15卷 16-20页

作者： Michall A.cairns Ronald R.Garton Richard A.Tubb 曹萃禾

为测定锌对硬头鳟Salmo gaisal的安全浓度,本文以鱼类在96小时的毒性试验中所出现的呼吸频率变化反应来加以评估。试验采用美国俄勒岗州的两种硬头鳟,在不同水温(7,12,17℃)和不同硬度(25,125毫克CaCO/升)的条件下接触锌溶液。呼吸频率... 详细信息

为测定锌对硬头鳟Salmo gaisal的安全浓度,本文以鱼类在96小时的毒性试验中所出现的呼吸频率变化反应来加以评估。试验采用美国俄勒岗州的两种硬头鳟,在不同水温(7,12,17℃)和不同硬度(25,125毫克CaCO/升)的条件下接触锌溶液。呼吸频率是根据口腔和鳃盖的张合而产生的生物电势来计测的,在10次试验中有5次表现出在高浓度情况下呼吸率显著增加。当水温12℃,硬度为25毫克CaCO_3/升时,锌的浓度达到144微克/升便出现呼吸频率变化的反应;而对于胚胎和幼鱼来说,安全浓度的计测有一个缓慢的接触过程,其值在444～819微克锌/升之间。这就表明,呼吸频率的计测至少象长期的毒性试验一样可作为一种测试手段。

关键词：鱼类硬头鳟安全浓度水温呼吸频率毒性试验呼吸率口腔反应化学因素

维普期刊数据库

在线全文

学校读者我要写书评

暂无评论

气喘和支气管炎自学问题解答

药学实践杂志 1984年第1期 65-66页

作者： F.G.Prior C.J.cairns B.G.Moore 魏玲

(一)在全身感染时,可出现哪类免疫球蛋白? *** *** *** ***(二)下列哪种微生物常与慢性支气管炎的发病过程相联系?

关键词：气喘病病人哮喘慢性支气管炎流感嗜血杆菌流感杆菌嗜血杆菌属色甘酸钠舒喘宁异丙阿托品抗胆碱能药

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

专家指导

影像视觉 2013年第12期14卷 97-101页

作者：李晓晨 Geoff Harris Angela Nicholson Chris Rutter George cairns 王其沾《影像视觉》专家团队柯达认证数码影像培训中心

怎样才能在拍摄时强化湖面上的倒影，让它变得像镜面一样平静？Geofl的回答：之前我们更多是收到如何减少水面或玻璃上的反光之类的问题．其常规的做法就是使用圆偏振镜（CPL），你的问题正好倒过来，问得非常好!当太阳在头顶或正；中... 详细信息

怎样才能在拍摄时强化湖面上的倒影，让它变得像镜面一样平静？Geofl的回答：之前我们更多是收到如何减少水面或玻璃上的反光之类的问题．其常规的做法就是使用圆偏振镜（CPL），你的问题正好倒过来，问得非常好!当太阳在头顶或正；中着阳光拍摄时，倒影的效果最不明显。所以．要想得到理想的倒影，最佳的拍摄时机是清晨或傍晚。当太阳高高挂在头顶时，水面强烈的反光会大大减少周围风景的倒影。同理，阳光直射被摄物体时我们便会得到最佳的倒影效果。

关键词：专家照片摄影拍摄时机圆偏振镜被摄物体倒影反光

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

心绞痛自学问题解答

药学实践杂志 1983年第2期 68-69页

作者： F.G.Prior C.J.cairns B.G.Moore 魏玲

(一)通过_以缓解心绞痛。A 运动B 休息(二)正常情况下,心绞痛病人心图电的变化是A ST 段压低B P 波比 QRS 综合波多C 出现宽而深的 Q 波(三)服用硝酸甘油后会出现哪些副作用? A体位性低血压 B低血钠 C周围血管收缩

关键词：心绞痛病人心纹痛冠心病硝酸甘油心舒宁

Evaluating Southern Appalachian Forest Dynamics without Eastern Hemlock: Consequences of Herbivory by the Hemlock Woolly Adelgid

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Forestry 2014年第2期4卷 91-99页

作者： Andrew G. Birt Yu Zeng Maria D. Tchakerian Robert N. Coulson Charles W. Lafon David M. cairns John Waldron Weimin Xi Szu-Hung Chen Douglas A. Street Department of Biological and Health Sciences Texas A&M University-Kingsville Kingsville USA Department of Environmental Studies University of West Florida Pensacola USA Department of Geography Texas A&M University College Station USA Knowledge Engineering Laboratory Department of Entomology Texas A&M University College Station USA Southern Research Station US Forest Service Alexandria Forestry Center Pineville USA

Eastern hemlock (Tsuga canadensis Carriére) and the Carolina hemlock (Tsuga caroliniana Engelmann) are ecologically important tree species in eastern North America forests that are currently threatened by the hemlock woolly adelgid (HWA, Adelges tsugae Annand, Hemiptera: Adelgidae). HWA has spread rapidly from its original introduction site into new areas. Once present, HWA kills its hosts over a period of 4 to 10 years leading to a phenomenon that is known scientifically and colloquially as hemlock decline. To date, quarantine, chemical management, and biocontrol efforts have failed to curb the spread of the HWA. As such, forest management efforts are now being redirected towards developing an understanding of the effects of hemlock removal on vegetation dynamics, changes in forest composition, and changes in ecosystem function. In this study, we parameterize a spatially explicit landscape simulation model LANDIS II for a specific forested region of the southern Appalachians. Parameterization involves defining the life-history attributes of 37 tree species occupying 11 ecological zones and is based on knowledge of: current vegetation composition data, recent historic management and fire regimes, and life-history traits of each species. The parameterized model is used to explore a simple scenario of catastrophic hemlock mortality likely to occur as a result of HWA herbivory. Our results emphasize that hemlock is an important foundation species. When hemlock is removed from the system, forest composition changes considerably with a greater presence of shade intolerant pine and oak species. Additionally, hemlock removal leads to a period of transient, relatively unstable vegetation dynamics as the forest communities restructure.

关键词： Hemlock Forest Dynamics LANDIS II Hemlock Woolly Adelgid Southern Appalachian