Expression of cyclooxygenase genes in the jejunum of horses during low-flow ischemia and reperfusion     

Hilton H  Nieto JE  Moore PF  Harmon FA  Naydan DK  Snyder JR 《American journal of veterinary research》2011,72(5):681-686

  相似文献   

Associations Between Dioxins/Furans and Dioxin-Like PCBs in Estuarine Sediment and Blue Crab     

Johan Liebens  Carl J. Mohrherr  Natalie K. Karouna-Renier  Richard A. Snyder  K. Ranga Rao 《Water, air, and soil pollution》2011,222(1-4):403-419

The objective of the present study was to evaluate the relationships between the quantity, toxicity, and compositional profile of dioxin/furan compounds (PCDD/Fs) and dioxin-like polychlorinated biphenyls (DL-PCBs) in estuarine sediment and in the blue crab (Callinectes sapidus). Sediment and blue crab samples were collected in three small urban estuaries that are in relatively close proximity to each other. Results show that differences between PCDD/F and DL-PCB mass concentrations and total toxic equivalents (TEQ) toxicity in sediments of the three estuaries are reflected in those of the blue crab. TEQs are higher in the hepatopancreas of the crabs than in the sediment, but the concentration factor is inversely proportional to the TEQ in the sediments. Congener profiles in the crabs are systematically different from those in the sediments, and the difference is more pronounced for PCDD/Fs than for DL-PCBs, possibly due to differences in metabolization rates. Compared with sediment profiles, more lesser-chlorinated PCDD/Fs that have higher TEFs accumulate in crab hepatopancreas. This selective bioaccumulation of PCDD/Fs results in a TEQ augmentation in crab hepatopancreas compared with sediments. The bioaccumulation in the blue crab is also selective for PCDD/Fs over DL-PCBs.  相似文献   

Wound leakage rates of ex vivo uniplanar versus biplanar phacoemulsification clear corneal incisions in dogs     

Kevin Snyder  Hannah Terhaar  Ellison Bentley  Paul E. Miller 《Veterinary ophthalmology》2020,23(2):325-330

  相似文献   

Variable silicon content of rice cultivars grown on everglades histosols 1     

C. W. Deren  L. E. Datnoff  G. H. Snyder 《Journal of plant nutrition》2013,36(11):2363-2368

Two experiments were conducted to investigate silicon (Si) content in a group of rice cultivars. Ten cultivars were grown in the greenhouse under three levels pf Si fertilization on a Si‐deficient Histosol. In a second experiment, 18 ‘cultivars were grown at three field locations which varied in plant‐available soil Si. In both experiments, cultivars varied in their percentage of Si in rice straw. There was no significant (P > 0.10) genotype by environment interaction. The genotypes with the greatest and lowest percentage of Si were consistently so over all Si environments and treatments.  相似文献   

Leaf Phosphorus Diagnosis of Sugarcane on Organic Soils     

D. R. Morris  B. Glaz  G. Powell  C. W. Deren  G. H. Snyder  R. Perdomo 《Journal of plant nutrition》2013,36(9):1511-1523

ABSTRACT

Most of the sugarcane (interspecific hybrids of Saccharum sp.) production in Florida is on organic soils. Supplemental phosphorus (P) fertilizer is often applied for optimum yields, but producers are required to reduce P levels in farm drainage waters. The objectives of this study were to relate optimum leaf P tissue concentration with yield in organic soil, and to determine optimum leaf sampling dates during the summer. Eight genotypes were planted at two locations, eight additional genotypes were planted at a third location, and eight more genotypes were planted at a fourth location. Crops were grown for three years. Measurements of leaf P concentration were repeated during growth seasons and over crop years for a total of six sampling dates at each location. Three fertilizer P treatments (0, 24, and 48 kg ha^?1 yr?1) were applied to all genotypes at each location. Leaf samples were partitioned into early-, mid-, and late-summer dates. Early-leaf samples had the widest range in leaf P concentrations compared with mid- and late-season leaf samples. Correlation analyses of yield vs. leaf P concentration across all treatments in early- and mid-summer were statistically significant (P < 0.05), but coefficients were low (r = 0.14 and 0.26, respectively). No consistent relationship across locations described the effect of leaf P tissue concentration on yield. Leaf P concentrations could not provide accurate P fertilization rates that will give maximum sugarcane yields and prevent over-fertilization of P. The highest potential for relating leaf P concentrations with yield appears to be from early leaf samples.  相似文献   

Identification of 12 EST-derived SSR markers in Lumbricus rubellus     

Zachary T. Lounsberry  Mark C. Ungerer  Bruce A. Snyder 《Pedobiologia》2013,56(4-6):191-193

While many species of earthworms are globally distributed, very little is known about the genetic population dynamics of this diverse group. We present the characterization of novel simple sequence repeat (SSR) markers, including primer information, number of alleles, repeat motif, and approximate size ranges, to be used in population genetic analyses of the earthworm Lumbricus rubellus Hoffmeister 1843. Specifically, we designed and characterized 12 novel, polymorphic markers derived from published expressed sequence tags (EST) for amplification in L. rubellus. The mean number of alleles per locus was 6.25 ± 1.91, indicating these markers will be sufficiently polymorphic for population genetic studies of this species.  相似文献   

California Irrigation Management Information System     

Richard L. Snyder 《American Journal of Potato Research》1984,61(4):229-234

  相似文献   

Injection of the insertion of the deep digital flexor tendon in horses using radiographic guidance     

J. D. C. Anderson  S. M. Puchalski  R. F. Larson  M. L. Delco  J. R. Snyder 《Equine Veterinary Education》2008,20(7):383-388

Insertional tendinopathies of the DDFT have been reported both as the sole lesion and as part of a multifocal lesion (Dyson et al. 2003). Computed tomography (CT) and magnetic resonance imaging allow specific diagnosis of deep digital flexor tendon lesions within the hoof capsule; however, direct intralesional treatment of such lesions is difficult because of the hoof's rigid structure. A technique designed to mimic intralesional injection of insertional tendinopathies of the DDFT in the standing horse using radiographic guidance was assessed. Radiographic and contrast CT imaging and sectioning of the limbs confirmed accurate injection in all cases although inadvertant administration of injectate into adjacent structures was also evident.  相似文献   

Rainfall Interception by Singleleaf Piñon and Utah Juniper: Implications for Stand-Level Effective Precipitation     

Tamzen K. Stringham  Keirith A. Snyder  Devon K. Snyder  Samuel S. Lossing  Craig A. Carr  Bennett J. Stringham 《Strength and Conditioning Journal》2018,71(3):327-335

The expansion of piñon and juniper trees into sagebrush steppe and the infilling of historic woodlands has caused a reduction in the cover and density of the understory vegetation. Water is the limiting factor in these systems; therefore, quantifying redistribution of water resources by tree species is critical to understanding the dynamics of these formerly sagebrush-dominated rangelands. Tree canopy interception may have a significant role in reducing the amount of rainfall that reaches the ground beneath the tree, thereby reducing the amount of available soil moisture. We measured canopy interception of rainfall by singleleaf piñon (Pinus monophylla Torr. & Frém.) and Utah juniper (Juniperus osteosperma [Torr.] Little) across a gradient of storm sizes. Simulated rainfall was used to quantify interception and effective precipitation during 130 rainfall events ranging in size from 2.2 to 25.9 mm hr^? 1 on 19 trees of each species. Effective precipitation was defined as the sum of throughfall and stemflow beneath tree canopies. Canopy interception averaged 44.6% (± 27.0%) with no significant difference between the two species. Tree allometrics including height, diameter at breast height, stump diameter, canopy area, live crown height, and width were measured and used as predictor variables. The best fit predictive model of effective precipitation under canopy was described by stump diameter and gross precipitation (R² = 0.744, P < 0.0001). An alternative management model based on canopy area and gross precipitation predicted effective precipitation with similar accuracy (R² = 0.741, P < 0.0001). Canopy area can be derived from various remote sensing techniques, allowing these results to be extrapolated to larger spatial scales to quantify the effect of increasing tree canopy cover on rainfall interception loss and potential implications for the water budget.  相似文献   

2008年上半年度全国白羽肉鸡生产形势报告     

中国畜业牧业协会禽业分会 《中国禽业导刊》2008,25(18)

2008年上半年,我国的白羽肉鸡市场还是国外引进品种一统天下。在引种数量上,全国共有9家企业先后从国外引进祖代肉种鸡34．16万套。在品种方面,爱拔益加（AA＋）的市场份额仍然保持第一,达到50．1％,罗斯308（Ross）和科宝（Cobb）分别占据第二和第三位,市场份额分别占到31．0％和18．9％。  相似文献