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Irrigation Termination Thermal Time and Amount on Cotton Lint Yield and Fiber Quality

Open Journal of Soil Science 2017年第9期7卷 216-234页

作者： Robert J. Lascano R. Louis Baumhardt Timothy S. Goebel Jeffrey T. Baker dennis C. Gitz III Wind Erosion and Water Conservation Cropping Systems Research Laboratory USDA-ARS* Lubbock TX USA Soil and Water Management Research Conservation and Production Research Laboratory USDA-ARS Bushland TX USA Wind Erosion and Water Conservation Cropping Systems Research Laboratory USDA-ARS Big Spring TX USA

Cotton irrigation in the Texas High Plains (THP) is often dictated by the well capacity and not by the water needs of the crop. The source of irrigation-water is the Ogallala aquifer and in many areas of the THP, the water table has declined to well capacities that deliver 1.3 to >7.6 mm/d. There is plenty of information on cotton responses to irrigation frequency and amount;however, information on when to terminate irrigation and its effect on cotton lint yield and fiber quality is scarce. Our objective was to evaluate over a 4-year period three irrigation termination thermal times corresponding to cumulative daily heat units (∑HU) of 890 °C, 1000 °C and 1110 °C from crop emergence, and three levels of irrigation (2.5, 5.1 and 7.6 mm/d) on cotton lint yield and fiber quality. Irrigation was applied with a sprinkler system on a 3-day frequency in Lubbock, TX. Results showed that on average the 7.6 mm/d level produced the most cotton lint yield regardless of the irrigation termination thermal time. Terminating cotton at 1000- °C ∑HU resulted in water savings of 25 to 50 mm for the 2.5 and 5.1 mm/d levels without significantly affecting lint yield. For the 7.6 mm/d and terminating at 890- °C ∑HU resulted in water savings of 100 to 115 mm. Average fiber length statistically increased with termination thermal time and level. This effect was most significant in years with the least rain and warmer air temperature. Micronaire increased with the termination thermal time in years with >500 mm of rain. Average fiber length uniformity and fiber strength were minimally affected by termination thermal time. As irrigation level increased, the average micronaire decreased, and fiber strength increased for the 5.1 and 7.6 mm/d irrigation. We concluded that in the THP for well capacities that deliver 2.5 - 5.1 mm/d irrigation can be terminated when the ∑HU reaches about 1000 °C from emergence without impacting cotton lint yield.

关键词： Irrigation Scheduling Semiarid Limited Water Texas High Plains Evapotranspiration

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海上地震勘探现状:更多、更好、更快、更省

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石油物探译丛 1998年第5期 74-78页

作者： dennis W.Nesser 程建春中国海洋石油渤海公司研究院

引言把一个实际地质体以可视化方式显示到一台计算机屏幕上,或打印纸上,3d地震数据体的最新显示方式是综合技术水平的产物。地学家们曾一直想在三维空间内观察他们想要看到的世界的展望,在20年内已经成现实。在一张显示图上,我们能同... 详细信息

引言把一个实际地质体以可视化方式显示到一台计算机屏幕上,或打印纸上,3d地震数据体的最新显示方式是综合技术水平的产物。地学家们曾一直想在三维空间内观察他们想要看到的世界的展望,在20年内已经成现实。在一张显示图上,我们能同时看到地下岩层的地震反射层时间、断层面、振幅、井眼轨迹、产油层和其它的一些特征。如果想把如此丰富的信启、提交给用户,就要求很多的人和设备来实现。我们现在所应用设备和工具的性能在20年前是难以想象的。

关键词：图形显示地震勘探计算机油气勘探

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威尔基d.弗格森美国迈阿密联邦法院

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建筑技艺 2009年第12期15卷 34-41页

作者： Robin Hill Norman McGrath J Espana dennis Wilhelm Arquitectonica

建筑由三部分组成：两栋塔楼相对而建，中间的玻璃“水晶”状体块起到了调和的作用。建筑从二层开始每层都设有4个审判庭，围绕中央锥状中庭中转空间排布。东、西立面由凹凸交替的幕墙组成，石预制框架包围观景窗。

关键词：迈阿密法院联邦美国空间排布框架包组成建筑

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含全碳和多炔阴离子配体的银簇化合物的超分子组装及其结构研究（英文）

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高等学校化学学报 2015年第11期36卷 2115-2133页

作者：侯俊傑胡婷譚耀新麥松威香港中文大学化学系创新多功能材料中心中国香港852 香港浸会大学化学系中国香港852 中国科学院海西研究院厦门稀土材料研究所厦门361021

总结了我们在新型炔银簇化合物研究方面的最新进展.这些化合物分为以下几种类型:(a)1,3,5-己三炔基和1,3,5,7-辛四炔基;(b)1,5-己二炔基;(c)经膦酸配体组装的乙炔基和烷基乙炔基;(d)苯乙炔基、环烷基乙炔基和含氮杂环基乙炔基结构单元... 详细信息

总结了我们在新型炔银簇化合物研究方面的最新进展.这些化合物分为以下几种类型:(a)1,3,5-己三炔基和1,3,5,7-辛四炔基;(b)1,5-己二炔基;(c)经膦酸配体组装的乙炔基和烷基乙炔基;(d)苯乙炔基、环烷基乙炔基和含氮杂环基乙炔基结构单元的银簇化合物;(e)经不同类型的银-碳配位键连接,并进一步通过分子内/分子间作用力稳固其配位网络的炔银化合物.我们还进一步讨论了溶剂、配体的位阻大小和辅助配体类型对于多维配位网络结构的影响.

关键词：全碳配体亲银作用多炔配体炔基银簇网络结构超分子合成子

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中国城市尺度科学知识网络与技术知识网络结构的时空复杂性

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地理研究 2015年第3期34卷 525-540页

作者：李丹丹汪涛魏也华袁丰中国科学院南京地理与湖泊研究所南京210008 中国科学院大学北京100049 南京师范大学地理科学学院江苏省地理信息资源开发与利用协同创新中心南京210023 犹他大学地理系及公共与国际事务研究院

知识在产业集聚、区域创新中的地位越来越突出,城市知识储量及其在区域知识网络中的地位对城市的综合竞争力有重要影响。学术论文合作与专利合作是知识溢出的体现形式,是科学和技术发展的重要成果,也是度量区域创新能力的主要指标。以20... 详细信息

知识在产业集聚、区域创新中的地位越来越突出,城市知识储量及其在区域知识网络中的地位对城市的综合竞争力有重要影响。学术论文合作与专利合作是知识溢出的体现形式,是科学和技术发展的重要成果,也是度量区域创新能力的主要指标。以2000-2009年中国生物技术领域合著论文和共同申请专利的信息为原始数据,分别构建中国城市间科学知识网络(scientific knowledge network,SKN)与技术知识网络(technological knowledge network,TKN)。运用复杂网络与地学空间分析方法,从整体网络结构特征、择优链接性、中心城市及其自我网络的空间特征等方面进行分析,探究知识溢出的时空复杂性。研究表明:1 SKN和TKN具有无标度网络特征;SKN节点度数的异质性高于TKN。2两种网络均呈异配性,即城市选择合作对象存在明显择优链接性,知识溢出具有粘着性和空间依赖性。3 SKN中心城市具有明显的等级结构,空间分布总体呈"大分散小集聚"特点;TKN中心城市层级结构不明显,尚未形成明显极化中心。4 SKN中心城市自我网络的合作空间,由最初的沿海省会城市间的合作转向长三角、珠三角、京津冀等区域间和沿海城市与内陆城市间的合作,区域间知识溢出明显;TKN中心城市自我网络仍多分布于沿海城市和少数中西部省会城市,区域间知识溢出不明显。5 SKN中心城市及其自我网络的时空演变存在等级扩散和传染扩散的现象,符合时空梯度推移规律,且空间等级梯度逐渐向扁平化转变;TKN中心城市及其自我网络的时空演变以等级扩散为主,时空梯度推移现象不明显。研究结论为量化知识溢出及知识溢出网络结构的时空演化过程提供新的研究视角,对城市创新政策的制定有一定借鉴意义。

关键词：知识溢出知识网络网络结构城市创新网络

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Is increased water consumption among older adults associated with improvements in glucose homeostasis?

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Open Journal of Preventive Medicine 2013年第5期3卷 363-367页

作者： Adrienne G. Clark Elizabeth A. dennis Parker Jyoti S. Savla Kevin P. davy Brenda M. davy department of Human development Virginia Tech Blacksburg USA department of Human Nutrition Foods and Exercise Virginia Tech Blacksburg USA department of Human Nutrition Foods and Exercise Virginia Tech Blacksburg USA Lombardi Comprehensive Cancer Center Georgetown University Medical Center Washington D.C. USA

Obesity and impaired glucose homeostasis in older adults place these individuals at risk for diabetes. dehydration, glucose homeostasis, and insulin resistance are related;while aging and dehydration are associated with decreased glucose tolerance, weight loss can improve glycemia. For older adults following hypocaloric diets, additional water consumption may lead to greater weight loss. Further more, research suggests an association between insulin resistance and the body water retention hormone, arginine vasopressin (AVP). Analysis of the association between plasma copeptin (an AVP derivative) and fasting glucose, insulin, and homeostasis model assessment of insulin resistance (HOMA-IR) may provide further insight into the relationship between dehydration and diabetes risk. Our objective was to investigate the possibility that increased water consumption among older adults (n = 29, BMI = 31 ± 1 kg/m2, age = 62 ± 1 years) could improve glucose homeostasis beyond that observed with weight loss, as well as associations between plasma copeptin and diabetes risk. This retrospective analysis utilized data from a previous investigation, in which obese/overweight older adults were assigned to one of two groups: 1) Water: consume 500 ml of water prior to three daily meals over a 12-week hypocaloric diet intervention, or 2) Non-water: hypocaloric diet alone. In the present analysis, fasting plasma glucose and insulin, HOMA-IR, and plasma copeptin were evaluated, and compared to urinary specific gravity (USG), drinking water consumption, and body weight. Analyses performed using group assignment, volume of drinking water consumed or among a subgroup pair-matched for weight loss and sex did not reveal significant differences between groups. However in the full sample, plasma insulin concentration was associated with USG (r = 0.512,

关键词： Older Adults diabetes Glucose Water Consumption Hydration

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Comparison of two misoprostol regimens for cervical priming before surgical pregnancy termination at 13 to 16 weeks gestations

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Open Journal of Obstetrics and Gynecology 2011年第4期1卷 187-190页

作者： dennis G. Chambers Robin J. Willcourt Anthony R. Laver Jane K. Baird Wye Y. Herbert 不详

Background: The optimal regimen has still to be determined for the use of misoprostol in the surgical termination of pregnancy in the early second trimester. Objective: To compare the outcomes of two different regimens for cervical priming with misoprostol before dilatation and evacuation (d & E) in 13 weeks - 16 weeks gestation pregnancy terminations. Methods: A retrospective analysis was performed of the medical records of two cohorts of 334 women each who were treated with either 3 sublingual doses of 2 misoprostol 200 μg tablets 30 minutes apart on admission or the same dosage preceded by 1 oral tablet of misoprostol 200 μg at home 3 hours before admission. Results: The addition of the home tablet of misoprostol increased the rate of one day completion of d & E from 97.3% to 100% (P = 0.004), and the overall mean theatre time for d&E was reduced by 12.3% in parous women (P = 0.001) and 6.4% in nulliparous women (P = 0.003) with the reduction being consistent across all gestations. Conclusions: This retrospective study showed that the addition of 1 oral tablet of misoprostol 200 μg at home 3 hours before admission to a regimen of 3 sublingual doses of 2 misoprostol 200 μg tablets 30 minutes apart on admission significantly increases the probability of all women at 13 weeks - 16 weeks gestation completing a termination of pregnancy in one day with a single d & E procedure and with a reduced theatre time.

关键词： Early Second-Trimester Surgical Abortion d & E Misoprostol Cervical Priming

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血管紧张素转换酶基因多态性对老年充血性心衰患者预后的影响

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心血管康复医学杂志 2006年第1期15卷 13-16页

作者：郑茵方壮伟 dennis M.McNamara 海南省人民医院医疗康复中心海南海口市570311 美国匹兹堡大学医学中心心血管研究所

目的:探讨血管紧张素转换酶(ACE)d／I基因多态性对老年充血性心力衰竭患者预后的影响。方法:用聚合酶链式反应(PCR)对185例左室收缩功能心衰患者(EF0．05),携带ACE d等位基因患者的生存率比II基因型明显降低(1年生存率II／Id／dd=53／43... 详细信息

目的:探讨血管紧张素转换酶(ACE)d／I基因多态性对老年充血性心力衰竭患者预后的影响。方法:用聚合酶链式反应(PCR)对185例左室收缩功能心衰患者(EFd／I基因多态性对心衰预后的影响。结果:ACE I／d基因型分布频率;纯合子dd 基因型34．0％,纯合子II基因型18．4％,杂合子Id基因型47．6％。这三型患者在年龄、性别、种族、病因、血压、心率、NYHA心功能、LVEF和药物治疗方面的差异无统计学意义(P>0．05),携带ACE d等位基因患者的生存率比II基因型明显降低(1年生存率II／Id／dd=53／43／34,2年=21／8．2／2．9,P=0．016)。结论:在老年充血性心力衰竭患者中,ACE基因多态性中dd型及d等位基因与心衰预后密切相关,是其预后预测因素之一。

关键词：血管紧张素转换酶基因心力衰竭,充血性

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中国南海盆地的成因和历史

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海洋石油 1984年第5期 6-27页

作者： Brian Taylor dennis E.Hayes 杨广泰李小克

1979年“维玛号”调查船在中国南海调查期间获得的磁异常资料,使我们得以对以前发现的南海盆地的海底扩张模式进行了修正。盆地东部的5d—11号东两向磁异常条带表明,海底扩张的年代为中渐新世到早中新世(距今32

关键词：盆地西南礼乐滩南海盆地晚渐新世洋壳大洋型地壳磁异常条带早中新世洋底扩张地壳运动海底扩张巴拉望地震记录剖面地震剖面老第三纪早第三纪中华人民共和国

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Measurement of Cotton Transpiration

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Agricultural Sciences 2018年第10期9卷 1299-1316页

作者： Robert J. Lascano Jeffery T. Baker Paxton Payton dennis C. Gitz III James R. Mahan Timothy S. Goebel Wind Erosion and Water Conservation Research Cropping Systems Research Laboratory USDA-ARS Lubbock TX USA Plant Stress Germplasm development Research Cropping Systems Research Laboratory USDA-ARS Lubbock TX USA

There are a few field methods available to directly measure water evapotranspiration (ET) along with its two components, evaporation from the soil (E) and from the crop (T). One such technique that measures T, uses sensors to calculate the sap flow (F) of water through the plant stem and is based on the conservation of mass and energy, i.e., the stem heat balance method. This instrument consists of a flexible heater that is wrapped around the plant stem with temperature sensors to measure the difference in temperature of F below and above the heater. This is a null method, where all inputs and outputs are known and the calculated F is a direct measure of T. This method has been used to measure T in a variety of crops, including cotton, grapes, olive trees, soybean, ornamental and horticultural crops. A new version of the EXO-SkinTM is the Stem Gauge dual Channel design (SGdCTM), which was commercially introduced and had a radically new design resulting in a different energy balance, compared to the original design, which needed experimental verification. An initial evaluation was done with potted cotton (Gossypium hirsutum, L.) plants in a greenhouse experiment showing that values of cotton-T measured with the new sensor were accurate;however, this comparison was limited to daily T T in the 2 - 7 mm/d range, representative of the semiarid Texas High Plains. For this purpose, cotton was planted on 12 June 2017 on a 1000 m2 plot in a soil classified in the Amarillo series at the facilities of the USdA-ARS, Lubbock, TX. For a period of 15 days, 2 to 16 Sep 2017, we measured hourly cotton-T with the new sensors and with portable growth chambers (0.75 m × 1 m cross-section, and 1 m height) where water vapor flux was measured at a 10 Hz frequency using an infrared gas analyzer. We used three chambers and, in each chamber, the new sensors were installed on four cotton plants. We used linear regression analysis to compare hourly and daily values of cotton-T measured with th

关键词： Stem Flow Gauge Growth Chamber Water Use Irrigation Evaporation Field Test

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