排序方式: 共有42条查询结果,搜索用时 328 毫秒
1.
Hoque M Somvanshi R Singh GR Mogha IV 《Journal of veterinary medicine. A, Physiology, pathology, clinical medicine》2002,49(8):403-407
A total of 19 adult hill cattle of both sexes were subjected to trans-rectal ultrasound scanning of urinary bladder to evaluate bladder wall thickness and the presence of space-occupying lesions. The animals were divided into four groups. Eight apparently healthy hill cattle maintained under standard ration served as control (group I) and the remaining II animals were divided into three groups (II, III and IV). Group II animals (n = 8) were fed with different type of ferns which were further divided into subgroups II-P, -D and -B and fed with Polystichum squarrosom (n = 2). Dryopteris juxtaposita (n = 2) and Pteridium aquilinum (n = 4) ferns, respectively. The one animal in group III was a natural case of enzootic bovine haematuria (EBH) and the two animals in group IV were natural cases of microscopic EBH fed with Polystichum squarrosum fern. In group I animals, the average bladder wall thickness was 1.45 mm. The delineation of the bladder wall was uniformly smooth and the echo pattern of the bladder was homogeneously black, which was suggestive of clear urine content. In group II (P, D and B) the average bladder wall thickness of the six animals was 1.87 mm and the sonographic features were within normal limit when compared with controls. In two of the animals of group II-B, the bladder wall was apparently thick (4.36 mm) and there was no intraluminal mass except at one or two focal elevated points. Animals of groups III and IV showed the average bladder wall thickness of 4.86 mm and were characterized by the presence of irregular sessile masses extending into the bladder lumen. The homogeneous anechoic area was reduced centrally due to the presence of a hypoechoic soft tissue mass all around the bladder wall. Post-sonographic urinalysis, biopsy and necropsy of selected cases further confirmed the sonographic findings. 相似文献
2.
Arthur E. L. Morris Lance R. Williams P. Charles Goebel Eugene C. Braig IV 《Ecology of Freshwater Fish》2012,21(4):597-608
Wood in streams functions as fish habitat, but relationships between fish abundance (or size) and large wood in streams are not consistent. One possible reason for variable relationships between fish and wood in streams is that the association of fish with wood habitat may depend on ecological context such as large‐scale geomorphology. We studied the relationship between salmonid assemblages and large wood jams (LWJ) in four settings that differed geomorphically at the scale of the stream corridor along a tributary to Lake Superior in old‐growth conifer–hardwood forest in northern Michigan. The focal fish species of this study were brook trout (Salvelinus fontinalis), which were wild in the stream. Relocation efforts for coaster brook trout (an adfluvial life history variant of brook trout) were ongoing in the study stream. We measured fish abundance and length in pairs of pools of similar size and substrate, but varying in the presence of LWJ; this allowed us to evaluate associations of fish simply with the presence of LWJ rather than with other channel or flow‐shaping functions of LWJ. The length of Oncorhynchus spp. and young introduced brook trout was not strongly correlated with LWJ presence; however, the presence of LWJ in pools was positively correlated with larger wild brook trout. We also found that the correspondence of LWJ with the abundance of salmonids appears to be moderated by the presence of alternative habitat in this relatively natural, old‐growth forest stream. 相似文献
3.
REBECCA L. FRANKENY VMD DAVID A. WILSON DVM MS Diplomate ACVS NAT T. MESSER IV DVM Diplomate ABVP CYNTHIA CAMPBELL-BEGGS DVM 《Veterinary surgery : VS》1995,24(6):515-517
Jejunojejunal intussusception occurred after jejunal resection and stapled functional end-to-end anastomosis in two pony mares. In both mares, the lead point of the intussusception was the stapled functional end-to-end (FEE) anastomosis. The stapled free ends of jejunum were oversewn with an inverting suture pattern. A possible explanation for development of the intussusception was the acute angle created in the intestine by the FEE anastomsis. This angulation may have impaired flow of ingesta causing motility changes that predisposed the site to intussusception. Because the oversewn blind intestinal ends acted as the lead point for formation of the intussusception, it may be inadvisable to oversew the stapled anastomotic ends. 相似文献
4.
The area restriction model for harvest scheduling problems can be formulated using mixed integer programs. The three different formulation types are cluster packing, cell aggregation, and the assignment formulation. Within the cell aggregation subgroup there is an exact formulation, the cover constraint (CC) approach; and an inexact formulation, the stand-centered approach. The cover constraint formulation has significantly more constraints than the stand-centered formulation. A computational comparison between these two methods is completed using cutting planes and constraint combinations using the CPLEX solver package. The CC approach as cutting planes was superior based on solution time. If formulation time were included with solution time, then the CC approach remains superior. The maximum harvest area is a significant factor of solution time. In addition, the percentage of total cutting planes used to solve the problem was examined. 相似文献
5.
6.
Loreida Timberg Kadri Koppel Rain Kuldjärv Edgar Chambers IV Aussama Soontrunnarudrungsri Suntaree Suwonsichon 《Journal Of Aquatic Food Product Technology》2013,22(6):552-566
The aim of the study was to describe and evaluate competitiveness of Estonian spice-cured sprat products in Estonia and Thailand. Sample A was saltiest, Sample B had lowest overall spiciness, and Sample C had highest pepper flavor and sour taste intensity. The main drivers of consumer acceptance for the spice-cured sprat products were different: flavor and appearance in Estonia and appearance and odor in Thailand. In Estonia, one cluster of consumers liked the traditional (Sample A) and lightly spiced (Sample B) sprat products, while the other cluster liked the traditional (Sample A) and the marinated (Sample C) sprat products. In Thailand, all samples scored low, but manual clustering indicated that marinated (Sample C) sprat products are most acceptable. The current study showed that spice-cured sprat products in general can be accepted by Thai consumers, especially as part of meals, if further flavor development is carried out with the products. 相似文献
7.
Mark P. Richards Roman Aranda IV Cai He George N. Phillips Jr. 《Journal Of Aquatic Food Product Technology》2013,22(4):416-423
pH can be manipulated to alter the oxidative stability of fish-based foods during storage. X-ray diffraction was used to investigate the ability of reduced pH to cause structural changes in fish hemoglobins that lead to enhanced oxidative degradation. Decreasing pH from 8.0 to 6.3 and 5.7 created a large channel for solvent entry into the heme crevice of perch hemoglobin beta chains. The proton-induced opening of this channel occurred between site CD3 and the heme-6-propionate. Solvent entry into the heme crevice can enhance metHb formation and hemin loss, processes that accelerate lipid oxidation. Reduced pH also decreased the distance between Ile at E11 in one of the alpha chains and the ligand above the heme iron atom. This sterically displaces O2 and protonated O2 which increases metHb formation. These studies demonstrate that pH reduction causes structural changes in perch hemoglobin which increase oxidative degradation of the heme pigment. 相似文献
8.
9.
K. Kumar I. V. Mogha H. P. Aithal Amarpal P. Kinjavdekar G. R. Singh A. M. Pawde H. C. Setia 《Veterinary research communications》2009,33(1):57-66
Survey radiographs of all the growing dogs aged up to 6 months, which were presented to the IVRI polyclinics during the 10 year
period were screened to study the determinants of bone mass, density and growth. On the basis of clinical history and radiographic
evaluation of long bones, the cases were categorized as normal or osteopenic. The relative cortical density (RCD), cortical
index (CI), diameter of bone at the distal metaphysis (DDFM) and the width of the growth plate (WFGP) were determined by taking
the femur as a model bone in German shepherd, Doberman and Spitz breeds of dogs at different age groups. The results showed
that the RCD was the least in 0–2 month old normal growing dogs in all the breeds. As the age advanced up to 6 months the
RCD increased 20–25%, and at 6 months, Spitz and Doberman showed significant increase (P < 0.05) in the RCD. In osteopenic
bones, RCD remained less (25–50%) than that of normal animals at all age groups, and at 2–6 months of age, RCD in osteopenic
bones was significantly lesser than in normal animals in GSD and Spitz breeds. The CI was also the least at 0–2 months of
age in normal dogs. The CI increased about 50% at 4–6 months of age in GSD and Spitz. Whereas in Dob., there was no appreciable
change in the CI at different age groups, and at 2–6 months it was significantly (P < 0.05) lesser than that of Spitz. In
osteopenic bones, the CI was 25–75% lesser than that of normal animals at different age groups, and at 4–6 months there was
significant difference (P < 0.05) between the normal and osteopenic bones in GSD and Spitz. The DDFM was the least in 0–2 month
old normal growing dogs, and as the age advanced, it increased 10–20% up to 6 months. However, no significant difference in
the DDFM was seen between breeds and also between the normal and osteopenic bones at different age groups. In normal animals,
the WFGP was highest in the early age, subsequently it reduced 50–75% and at 4–6 months there was significant decrease (P < 0.05)
in all the breeds of dogs. And at 4–6 months, there was significant (P < 0.05) difference in the WFGP between breeds, it was
the least in Spitz and maximum in Dob., suggesting faster growth plate closure in Spitz than in GSD and Dob. breeds. In osteopenic
bones, WFGP was generally more than in normal animals, and at 4–6 months (about 3–5 times more) there was significant difference
(P < 0.05) between the normal and osteopenic bones in all breeds, indicating that physeal closure may be delayed in osteopenic
bones. The results indicate that among different breeds Doberman breed has the least bone mass and may be more prone to osteopenia;
whereas Spitz has the strongest bone. 相似文献
10.