Personality's role in moral action     

Spezio ML  Peterson GR  Brown WS  Reimer KS  van Slyke J 《Science (New York, N.Y.)》2011,332(6036):1380-1381

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Quantifying hydrogen bond cooperativity in water: VRT spectroscopy of the water tetramer     

Cruzan JD  Braly LB  Liu K  Brown MG  Loeser JG  Saykally RJ 《Science (New York, N.Y.)》1996,271(5245):59-62

Measurement of the far-infrared vibration-rotation tunneling spectrum of the perdeuterated water tetramer is described. Precisely determined rotational constants and relative intensity measurements indicate a cyclic quasi-planar minimum energy structure, which is in agreement with recent ab initio calculations. The O-O separation deduced from the data indicates a rapid exponential convergence to the ordered bulk value with increasing cluster size. Observed quantum tunneling splittings are interpreted in terms of hydrogen bond rearrangements connecting two degenerate structures.  相似文献   

THE DETERMINATION OF BLOOD VOLUME WITH RED BLOOD CELLS CONTAINING RADIOACTIVE PHOSPHORUS (P32)     

Brown FA  Hempelmann LH  Elman R 《Science (New York, N.Y.)》1942,96(2492):323-324

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A SIMPLE APPARATUS FOR PRESSURE FILTRATION     

Brown EA  Benotti N 《Science (New York, N.Y.)》1941,93(2401):23-24

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Beveling of fine micropipette electrodes by a rapid precision method   总被引：1，自引：0，他引：1  

K T Brown  D G Flaming 《Science (New York, N.Y.)》1974,185(4152):693-695

A technique has been developed for embedding alumina particles 0.05 micrometer in size in the surface of a polyurethane film laid on glass. This abrasive surface is used for rapid, precise, and reliable beveling of Pyrex micropipettes with tip diameters at least as small as 0.1 micrometer. In the snapping turtle retina the beveled electrodes give much better cell penetration and intracellular response stability than unbeveled electrodes of considerably higher proach to this problem.  相似文献   

Diagnostic utility of cerebrospinal fluid analysis in dogs with suspected idiopathic epilepsy     

SE Gilbert  TJ Cardy  S Bertram  F Taylor‐Brown 《Australian veterinary journal》2021,99(1-2):1-5

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A risk efficiency analysis of backgrounding and finishing steers on pasture in Saskatchewan, Canada     

B. J. Perillat  W. J. Brown  R. D. H. Cohen 《Agricultural Systems》2004,80(3):213-233

This paper combines an agricultural production decision support tool, GrassGro, with economic risk efficiency theory to examine several cattle feeding options that include various grazing systems for three climatic environments in Saskatchewan, Canada. Historical weather data were used to simulate a distribution of forage and cattle production data for each of several grazing systems during a 21-year period, 1978–1998. Price variability was included by varying year 2000 prices using historical price margin changes between the buying and selling weights of cattle. The risk efficiency analysis was completed using the Mean Standard Deviation (MSD) framework, and stochastic dominance principles.

Results of the study suggested that feeding systems, which included grazing, were economically competitive with traditional feedlot feeding systems and grain farming. Finishing cattle on pasture with the addition of a barley supplement was an attractive option, especially when high pasture productivity can be achieved. In all locations, more intense systems that included pasture fertilization and provision of an energy supplement, improved production and risk efficiency. Although the average net returns of all these feeding simulations were negative, the returns of traditional grain crops were even more negative. It is these negative returns in grain operations that lead to the incentive for producers to diversify into cattle production. Despite the negative net returns, the cash flow (range −$15.59 to $407.54 ha⁻¹) was mostly positive in all three locations.  相似文献   

Carotene, tocopherol, and ascorbate contents in subspecies of Brassica oleracea   总被引：1，自引：0，他引：1  

Kurilich AC  Tsau GJ  Brown A  Howard L  Klein BP  Jeffery EH  Kushad M  Wallig MA  Juvik JA 《Journal of agricultural and food chemistry》1999,47(4):1576-1581

Cruciferous vegetables contain high levels of vitamins that can act as antioxidants, compounds that may protect against several degenerative diseases. The edible portions of 50 broccoli and 13 cabbage, kale, cauliflower, and Brussels sprouts accessions were assayed to determine variation in alpha-carotene, beta-carotene, alpha-tocopherol, gamma-tocopherol, and ascorbate contents within and between subspecies of Brassica oleracea. Ascorbate content was estimated in fresh samples using HPLC. Tissues for carotene and tocopherol analysis were lyophilized prior to extraction. Carotene and tocopherol concentrations were simultaneously measured using a reverse phase HPLC system. Results indicate that there is substantial variation both within and between subspecies. Kale had the highest levels of vitamins, followed by broccoli and Brussels sprouts with intermediate levels and then by cabbage and cauliflower, with comparatively low concentrations. Variability in vitamin content among the broccoli accessions suggests that potential health benefits that accrue with consumption are genotype dependent.  相似文献   

The movement of metals applied to soils in sewage effluent     

Brown  K. W.  Thomas  J. C.  Slowey  J. F. 《Water, air, and soil pollution》1983,19(1):43-54

Water, Air, & Soil Pollution - Land treatment is increasingly being utilized as a method of waste disposal for both sewage effluent and sludges. While there has been considerable attention...  相似文献   

Volatilization of 1,3-Dichloropropene under Different Application Methods     

Wang  D.  Yates  S. R.  Ernst  F. F.  Knuteson  J. A.  Brown  George E. 《Water, air, and soil pollution》2001,127(1-4):109-123

Atmospheric emission of volatilepesticides can be a significant source of airpollution. A field study was conducted to reduce1,3-dichloropropene (1,3-D) emission by applying thechemical via subsurface drip irrigation with a reduceddosage (4.7 g m^-2 or 47 kg ha^-1). Comparisons were made between ashallow drip application with the plot covered with apolyethylene film, a deep drip application and aconventional shank injection (at 11.2 g m^-2) withthe plots left as bare soil surface. For eachtreatment, seven replicated active flux chambers wereused continuously to measure 1,3-D loss until nomeasurable emission was found. Results indicated thattotal 1,3-D emission loss was over 90% for the shankinjection, and 66 and 57% for the shallow and deepdrip plots, respectively. The emission loss wasextremely high for shank injection since about 80%were lost from the bed furrows where the slantedshanks left uncompacted fractures. On mass basis, theshank plot lost 10.4 g m^-2, whereas the shallow-and deep-drip plots lost 3.1 and 2.7 g m^-2,respectively. Applying 1,3-D using subsurface dripirrigation with reduced dosage has a great potentialfor emission reduction.  相似文献