Optimum Soil Water Content for Chickpea Emergence in Heavy‐Textured Soils of North‐West Bangladesh          下载免费PDF全文

W. H. Vance  R. W. Bell  C. Johansen 《Journal of Agronomy and Crop Science》2015,201(3):195-205

Sowing of chickpea in the heavy‐textured soils of north‐west Bangladesh with minimum tillage technology aims to increase the timely planting of large areas during a relatively short sowing window before soil water deficit limits germination and emergence. However, the seedbed conditions into which chickpea is sown need to be better quantified, so that limiting factors which affect germination and emergence can be identified. Two of the soil physical characteristics of importance are soil water and aeration. Growth cabinet studies have identified the fastest germination and emergence of chickpea on representative soils for this area at gravimetric water contents of 17–18 %, whilst soil water contents above and below this delayed germination and emergence. Emergence was recorded at soil water potentials between field capacity (?10 kPa) and wilting point (?1500 kPa). Emergence was possible at lower soil water potentials in the finer textured soil, whilst in coarser textured soil, emergence was still possible at higher soil water potentials.  相似文献   

Fatal Chlamydia psittaci infection in a domestic kitten     

Hailey Sanderson  Marce Vasquez  Hally Killion  Madison Vance  Kerry Sondgeroth  Jonathan Fox 《Journal of veterinary diagnostic investigation》2021,33(1):101

Chlamydia psittaci has not been reported to cause disease in domestic cats, to our knowledge. In contrast, C. felis infection is common in domestic cats and typically results in conjunctivitis, upper respiratory tract infection, and less frequently pneumonia. Herein, we report the pathologic findings and diagnostic features of a fatal case of psittacosis in a 7-wk-old domestic kitten. The animal was 1 of a litter of 5 that, together with the queen, were yielded to a pet rescue center in Wyoming. Over a period of ~3 wk, the kittens and queen became sick, thin, and icteric prior to death, despite antimicrobial treatments. Postmortem evaluation of a kitten revealed necrosuppurative hepatitis with Gimenez stain–positive intracellular bacteria, nonsuppurative pneumonia, and mild leptomeningitis. The diagnosis of psittacosis was made by 16S rRNA PCR using multiple primer sets and sequencing from liver. Psittacosis should be considered a differential diagnosis in domestic cats with intracellular bacterial hepatitis and interstitial pneumonia.  相似文献   

Johne''s Disease in a European Red Deer          下载免费PDF全文

H. N. Vance 《The Canadian veterinary journal. La revue veterinaire canadienne》1961,2(8):305-307

  相似文献   

Microtubule stabilization reduces scarring and causes axon regeneration after spinal cord injury     

Hellal F  Hurtado A  Ruschel J  Flynn KC  Laskowski CJ  Umlauf M  Kapitein LC  Strikis D  Lemmon V  Bixby J  Hoogenraad CC  Bradke F 《Science (New York, N.Y.)》2011,331(6019):928-931

Hypertrophic scarring and poor intrinsic axon growth capacity constitute major obstacles for spinal cord repair. These processes are tightly regulated by microtubule dynamics. Here, moderate microtubule stabilization decreased scar formation after spinal cord injury in rodents through various cellular mechanisms, including dampening of transforming growth factor-β signaling. It prevented accumulation of chondroitin sulfate proteoglycans and rendered the lesion site permissive for axon regeneration of growth-competent sensory neurons. Microtubule stabilization also promoted growth of central nervous system axons of the Raphe-spinal tract and led to functional improvement. Thus, microtubule stabilization reduces fibrotic scarring and enhances the capacity of axons to grow.  相似文献   

Polywater: an attempt at synthesis in a gas discharge     

Leiga AG  Vance DW  Ward AT 《Science (New York, N.Y.)》1970,168(3927):114-116

An attempt to produce polywater in a corona discharge in moist air was unsuccessful. However, the major product produced, nitric acid, has a midrange infrared spectrum which is strikingly similar to that reported for polywater. The Raman spectrum offers a better means of distinguishing between nitric acid and polywater than the infrared spectrum does.  相似文献   

TDP-43 mutations in familial and sporadic amyotrophic lateral sclerosis   总被引：1，自引：0，他引：1  

Sreedharan J  Blair IP  Tripathi VB  Hu X  Vance C  Rogelj B  Ackerley S  Durnall JC  Williams KL  Buratti E  Baralle F  de Belleroche J  Mitchell JD  Leigh PN  Al-Chalabi A  Miller CC  Nicholson G  Shaw CE 《Science (New York, N.Y.)》2008,319(5870):1668-1672

Amyotrophic lateral sclerosis (ALS) is a fatal motor neuron disorder characterized pathologically by ubiquitinated TAR DNA binding protein (TDP-43) inclusions. The function of TDP-43 in the nervous system is uncertain, and a mechanistic role in neurodegeneration remains speculative. We identified neighboring mutations in a highly conserved region of TARDBP in sporadic and familial ALS cases. TARDBPM337V segregated with disease within one kindred and a genome-wide scan confirmed that linkage was restricted to chromosome 1p36, which contains the TARDBP locus. Mutant forms of TDP-43 fragmented in vitro more readily than wild type and, in vivo, caused neural apoptosis and developmental delay in the chick embryo. Our evidence suggests a pathophysiological link between TDP-43 and ALS.  相似文献   

The Canadian Veterinary Medical Association – Democracy or Oligarchy: A Reply          下载免费PDF全文

H. N. Vance 《The Canadian veterinary journal. La revue veterinaire canadienne》1978,19(7):197

  相似文献   

Hexamitiasis In Alberta Turkey Flocks          下载免费PDF全文

H. N. Vance  C. H. Bigland 《Canadian journal of veterinary research》1956,20(9):337-338,339-342

  相似文献   

Micro-Spatial Variability of Soil Nitrate Following Nitrogen Fertilization and Drip Irrigation     

Sharmasarkar  Florence Cassel  Sharmasarkar  Shankar  Zhang  Renduo  Vance  George F.  Miller  Stephen D. 《Water, air, and soil pollution》1999,116(3-4):605-619

Micro-spatial analysis of nitrate (NO₃), an environmental contaminant partially attributed to nitrogen fertilization, can be useful for estimating its distribution in soils. A study was conducted to determine the micro-spatial distribution of soil NO₃ using kriging and cokriging in a drip-irrigated and nitrogen-fertilized field. One hundred soil samples were collected in a regular grid pattern from a 10 m × 20 m plot, and analyzed for soil NO₃ and pH. The effect of reduced sample size on NO₃ estimation was also evaluated. The pH data indicated the soils were slightly acidic to neutral with log[NO₃] values ranging from 1.66 to 2.95. These parameters were inversely related; which was probably an attribute of soil nitrification process. Sample variograms and cross-variograms suggested that the spatial distribution of pH and log[NO₃] could be described by linear models in the area studied, as indicated by small MSE (mean sum error), and RKV (reduced kriging variance) values close to 1. Contour maps based on kriging and cokriging estimates indicated greater homogeneity of the variables in the south-north direction than the east-west, except for zones of high NO₃ and low pH in the north-central edge and north-east corner of the grid area. Cokriging of log[NO₃] estimation, using pH data, improved MSE, MSSE (mean sum square error), MKV (mean kriging variance), RKV, CEE (correlation between estimated data and error), CEM (correlation between estimated and measured data) by 46, 31, 30, 22, 96, and 98%, respectively, as compared to kriging. Lower cokriging variance for any estimated log[NO₃] value, as compared to the kriging analysis, indicated that cokriging provided more accurate estimates. With reduced sample observations (n) for NO₃ similar conclusions were obtained; and the estimation accuracy was maintained up to n >70. Cokriging analysis with reduced n also curtailed the analytical cost, and facilitated NO₃ estimation by means of pH, which was measured at a cheaper cost.  相似文献   

Influence of mapping resolution on assessments of stream and streamside conditions: lessons from coastal Oregon,USA     

Ken Vance‐Borland  Kelly Burnett  Sharon Clarke 《水产资源保护:海洋与淡水生态系统》2009,19(3):252-263

• 1. Digital hydrographic data are commonly employed in research, planning, and monitoring for freshwater conservation, but hydrographic datasets differ in spatial resolution and accuracy of spatial representation, possibly leading to inaccurate conclusions or unsuitable policies for streams and streamside areas.
• 2. To examine and illustrate the potential for different hydrographic datasets to influence in‐channel and streamside characterizations, a study area in the US Pacific Northwest was chosen because 1:100 000, 1:24 000, and densified 1:24 000 hydrography are available and widely used in research and management for several species of Pacific salmon and trout at risk. The potential was examined for differences among the digital hydrographic datasets in: (1) spatial extent to influence estimated abundances of fish habitat, streamside buffer conditions, and fish distributions; and (2) spatial position to influence estimated streamside buffer conditions and estimated stream gradient.
• 3. The analysis of spatial extent found the total stream length represented by the 1:100 000 hydrography was approximately one half that of 1:24 000 hydrography and only one fifth that of densified 1:24 000 hydrography. The 1:100 000 and 1:24 000 networks differed significantly for 13 out of 18 fish habitat attributes, and the three hydrographic datasets differed significantly for many characteristics in streamside buffers; fish distributions mapped at 1:24 000 added 6–14% of stream length to 1:100 000 distributions. The analysis of spatial position found few differences between the 1:100 000 and 1:24 000 hydrography in streamside buffer characteristics but significant differences in channel gradient.
• 4. Overall, hydrographic datasets differed only slightly in spatial position but differed in spatial extent to the point of representing different populations of streams. If species inhabiting larger streams (greater mean annual discharge) are of interest, then results derived from studies based on 1:100 000 hydrography should prove useful. However, higher‐resolution hydrography can be critical when designing and implementing strategies to protect fish and other aquatic species at risk in smaller streams.

Copyright © 2008 John Wiley & Sons, Ltd.  相似文献