Air ion exposure system for plants     

Morrow RC  Tibbitts TW 《HortScience : a publication of the American Society for Horticultural Science》1987,22(1):148-151

A system was developed for subjecting plants to elevated air ion levels. This system consisted of a rectangular Plexiglas chamber lined with a Faraday cage. Air ions were generated by corona discharge from frayed stainless steel fibers placed at one end of the chamber. This source was capable of producing varying levels of either positive or negative air ions. During plant exposures, environmental conditions were controlled by operating the unit in a growth chamber.  相似文献   

Canine renal pathology associated with grape or raisin ingestion: 10 cases.     

Carla M K Morrow  Victor E Valli  Petra A Volmer  Paul A Eubig 《Journal of veterinary diagnostic investigation》2005,17(3):223-231

Ten dogs suffered acute renal failure after ingesting > or = 3 g/kg (dry matter) of grapes or raisins. All dogs had degeneration or necrosis (or both) of proximal renal tubules with basement membranes remaining intact, and epithelial regeneration was observed in 5 out of 10 cases. Mineralized tubular debris or granular to proteinaceous casts (or both) were present in all cases. A golden-brown, globular, intracellular pigment of varying amounts and sizes was observed in 6 out of 10 cases with variable reaction with Prussian blue. Multifocal fibrinous arteritis of the large colon was seen in 2 out of 5 cases with globulin insudation of vessel wall demonstrated by immunohistochemical staining for immunoglobulin (Ig)G and IgM. Mineral analysis on frozen renal tissue from 2 out of 2 cases revealed mildly elevated Ca:P ratio in both. Clinically significant observations were preservation of the integrity of basement membranes after grape-induced tubular injury and presence of early epithelial regeneration. Thus, recovery may be possible if anuria is aggressively managed. With respect to potential pathophysiologic mechanisms, further research into the roles of calcium homeostasis, vascular reactivity, and the significance of the golden-brown pigment is indicated.  相似文献   

Acute selenite toxicosis in lambs   总被引：3，自引：0，他引：3  

D A Morrow 《Journal of the American Veterinary Medical Association》1968,152(11):1625-1629

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Comparison of heat tolerance of feedlot heifers of different breeds   总被引：1，自引：0，他引：1  

T.M. Brown-Brandl  J.A. Nienaber  R.A. Eigenberg  T.L. Mader  J.L. Morrow  J.W. Dailey 《Livestock Science》2006,105(1-3):19-26

Heat stress in cattle causes decreases in feed intake and feed efficiency; in extreme cases, it can cause death. These losses amount to millions of dollars each year. A study was designed to determine severity of heat stress among four breeds of cattle. Throughout two summers, 256 feedlot heifers of four different breeds were observed. Respiration rates, panting scores, and surface temperatures were taken twice each day on 10 animals/breed for several weeks during the summers of 2002 and 2003. Twenty-four-hour behavior measurements were recorded for four heat-stress and four thermoneutral days. Results showed during the afternoon, Angus cattle (black) had the highest respiration rates, panting scores, and surface temperatures, followed by the MARC III (dark red), Gelbvieh (tan), and Charolais (white). Behavior data showed that heat stress increased drinking and standing behavior, and decreased eating, lying, and agonistic behaviors, and that dark-hided cattle adjusted their behavior more than light-hided cattle. Overall, it was found that breed of cattle with dark-hides were more affected by temperature changes and at peak temperatures than breeds of cattle with light-hides.  相似文献   

Correlation between Chemical Structure and Biological Activity of Host-Selective Plant Pathogen Mycotoxins     

WEI Shuhua LIANG Jun YE Jianren ZHANG Xingyao** . School of Resources  Environment of Nanjing Forestry University  Nanjing  P.R. China . Institute of Forest Ecology  Environmental  Protection  Chinese Academy of Forestry  Beijing  P.R. China 《中国林业科技(英文版)》2007,6(1):62-68

Toxin, one of the most important factors of plant fungal disease, has attracted much attention of many academicians who have been studying pathogen mycotoxin in deep research. The paper summarized chemical structures of some host-selective plant pathogen mycotoxins discovered in recent years and the correlation between biological activity and chemical structure of toxin.  相似文献   

Longitudinal growth strain as a log and wood quality predictor for plantation-grown <Emphasis Type="Italic">Eucalyptus nitens</Emphasis> sawlogs     

Juan Valencia  Chris Harwood  Russell Washusen  Andrew Morrow  Matthew Wood  Peter Volker 《Wood Science and Technology》2011,45(1):15-34

Peripheral longitudinal growth strain (LGS) was measured on a total of 81, 22-year-old pruned Eucalyptus nitens trees from five thinning treatments in a plantation thinning trial in Tasmania. Growth strain data were gathered at breast height on each tree using the CIRAD-Forêt method. The effects of thinning treatment and tree diameter on LGS and its relationships to solid-wood traits determined in a processing trial were examined. LGS was significantly higher in the direction of the prevailing wind and was not significantly affected by either thinning treatment or tree diameter. An index of log end splitting was positively related to tree diameter, sawlog position (upper/lower), and LGS, which explained up to an additional 20% of the variance after tree diameter and log position were accounted for in a linear regression model. High LGS and log end splitting were significant indicators of increased board end splitting.  相似文献   

THE NEED OF ANOTHER PHILANTHROPIST BY ORGANIC CHEMISTS     

Morrow CA 《Science (New York, N.Y.)》1918,48(1242):394-395

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A military technology: the poisonous cloud     

Morrow JH 《Science (New York, N.Y.)》1986,234(4780):1132

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Linkage of early-onset familial breast cancer to chromosome 17q21   总被引：191，自引：0，他引：191  

J M Hall  M K Lee  B Newman  J E Morrow  L A Anderson  B Huey  M C King 《Science (New York, N.Y.)》1990,250(4988):1684-1689

Human breast cancer is usually caused by genetic alterations of somatic cells of the breast, but occasionally, susceptibility to the disease is inherited. Mapping the genes responsible for inherited breast cancer may also allow the identification of early lesions that are critical for the development of breast cancer in the general population. Chromosome 17q21 appears to be the locale of a gene for inherited susceptibility to breast cancer in families with early-onset disease. Genetic analysis yields a lod score (logarithm of the likelihood ratio for linkage) of 5.98 for linkage of breast cancer susceptibility to D17S74 in early-onset families and negative lod scores in families with late-onset disease. Likelihood ratios in favor of linkage heterogeneity among families ranged between 2000:1 and greater than 10(6):1 on the basis of multipoint analysis of four loci in the region.  相似文献   

Stabilizing Lead-Salt Diode Lasers: Understanding and Controlling Chaotic Frequency Emission     

G Chin  LR Senesac  WE Blass  JJ Hillman 《Science (New York, N.Y.)》1996,274(5292):1498-1501

Lead-salt tunable diode lasers (TDLs) are the only devices currently available that can generate tunable monochromatic radiation at arbitrary wavelengths between 3 and 30 micrometers and are particularly useful for high-resolution spectroscopy over a wide range of spectral regimes. Detailed observations of TDLs show that the observed instrumental linewidth is actually a temporal average of many narrow (less than 0.5 megahertz) emission "modes." The time scale characteristic of these "modes," which appear to be of relatively constant intensity, is of the order of a microsecond. The laser's behavior is highly suggestive of a chaotic process, that is, seemingly random excursions of a dynamic variable (frequency) within a bounded range. This report shows experimentally that TDL emissions are indeed chaotic. Furthermore, in a simple and robust fashion, this chaotic behavior has been successfully controlled with the use of recent techniques that take advantage of chaos to produce a narrow band laser output.  相似文献