首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   15篇
  免费   0篇
农学   2篇
综合类   1篇
水产渔业   2篇
畜牧兽医   9篇
植物保护   1篇
  2011年   2篇
  2009年   1篇
  2008年   1篇
  2001年   1篇
  1999年   1篇
  1994年   1篇
  1992年   2篇
  1991年   1篇
  1990年   1篇
  1986年   1篇
  1976年   1篇
  1975年   1篇
  1945年   1篇
排序方式: 共有15条查询结果,搜索用时 15 毫秒
1.
山羊脑灰质软化症 (POLIOEN CEPHALOMALACIA)和李氏杆菌病 (LIS TERIOSIS)是症状相似治疗方法截然不同的两种疾病。山羊饲养者和兽医工作者必须从两种疾病的细微差别中进行鉴别 ,以便正确治疗和处理病羊。多数情况下 ,这两种疾病出现在饲养条件比较好、但饲养方法不当的地方。特别是在快速育肥时。精饲料喂量过多 ,而含粗纤维的饲料喂量过少是诱发两种疾病的重要因素。突然更换饲料常常导致此病突然发作。脑灰质软化症 (通常又称为大脑皮层坏死症 )是缺乏硫胺 (即维生素B1)而造成的一种代谢性疾病。瘤胃环…  相似文献   
2.
This research takes a neighborhood‐level geographic approach to analyzing the issue of minority‐owned business access to economic opportunity. Disparity persists between the considerable number of minority‐owned businesses and their meager impact on economies across the country. Agencies identifying barriers to full economic inclusion for these firms overlook geographic considerations. While the City of Philadelphia allots considerable resources to alleviating this disparity through its municipal set‐aside program, its reports track these efforts mainly by ethnicity. The nonspatial emphasis of the reported data renders invisible neighborhood‐level trends and geographic explanations for the disparity such as associating business size and activity to neighborhood context. Using geographic information systems analysis, this research finds neighborhood‐level geographic inequity in the city contracts awarded to minority‐owned professional services businesses in Philadelphia. The findings suggest that minority‐owned businesses located in certain predominantly minority areas of Philadelphia possibly encounter a geographic disadvantage that limits them from connecting with economic activity. These businesses may face a spatial barrier to full economic inclusion.  相似文献   
3.
Abstract— Twenty-seven proven atopic dogs had a serologic allergy test performed on the day of skin testing and again after either a 21-day course of corticosteroid treatment or 60 days without therapy during which time exposure to botanical aeroallergens was reduced or absent. There was no statistical difference in preand post-corticosteriod treatment results. There were significantly more positive scores recorded in the 60-day follow-up samples in the untreated dogs. Résumé— Vingt-sept chiens ayant une atopie prouvée ont subi des tests sérologiques d'allergie avant et 21 jours après une corticothérapie ou 60 jours sans traitement et sans exposition pollinique. Il n'y avait pas de difference statistiquement significative avant et après le traitement corticoïde. Il y avait beaucoup plus de résultats positifs à 60 jours chez les animaux ne subissant aucun traitement. Zusammenfassung— Bei 27 Hunden mit nachgewiesener Atopie wurde ein serologischer Allergietest am selben Tab wie der Hauttest und erneut entweder nach 21-tägiger Kortikosteroidbehandlung oder nach 60 Tagen ohne Therapie durchgeführt. Bei der zweiten Gruppe wurde die Exposition gegenüber pflanzlichen Aeroallergenen reduziert oder fehlte. Es gab keinen statistisch signifikanten Unterschied bei den Ergebnissen vor und nach Korikosteroidtherapie. Es trat eine statistch signifikant höhere Zahl positiver Reaktionen in den Proben der nicht behandeltentiere nach 60 Tagen aug. Resumen Veinti-siete perros en los que se había diagnosticado previamente atopía, se hizo un test serológico de alergia simultáneamente con tests de inyecciones intradérmicas durante el mismo día, volviendose a repetir a los 21 días despues del tratamiento con corticosteroides, o después de 60 días sin ningun tipo de medicacion, durante en cual exposición a aero-alergenos botánicos fué minima o inexistente. No se observó diferencia de tipo estadístico en animales antes o despues del tratamiento con corticosteroides. En los animales que no recibieron medicación, después de 60 días se observó un aumento significativo de respuestas positivas.  相似文献   
4.
5.
Resumen— Describimos un caso de alopecia simétrica bilateral en un hurón hembra esterilizada de 3 años. El cuadro resultó estar asociado con un adenocarcinoma adrenocortical y con concentraciones séricas elevadas de estradiol. Además el animal presentaba eritema figurado en la zona dorsolateral, lumbosacra y en la cola con caracteristicas clinicas e histopatológicas parecidas al eritema annulare centrifugum de la especie humana. El eritema figurado se trató con éxito con un producto comercial que contiene el ácido graso omega-3/omega-6. [Scott D. W., Gould, J. W., Cayatte, S. M., Lawrence, H. J., Miller, W. H., Jr. Figurate erythema resembling erythema annulare centrifugum in a ferret with adrenocortical adenocar-cinoma-associated alopecia (Eritema figurado parecido a eritema anulare centrifugum en un hurón con alopecia asociada a un adenocarcinoma adrenocortical).
Abstract— Bilaterally symmetric alopecia and vulvar enlargement is reported in a 3-year-old, spayed female ferret. The condition was ultimately shown to be associated with an adrenocortical adenocarcinoma and elevated serum estradiol concentrations. In addition, the ferret had a figurate erythema over the dorsolateral lumbosacral region and tail that was clinically and histopathologically similar to erythema annulare centrifugum in humans. The figurate erythema was successfully treated with a commercial omega-3/omega-6 fatty acid-containing product.  相似文献   
6.
Serial recordings of sensory evoked potentials (SEP) generated in response to stimulation of each tibial nerve were obtained from 23 anesthetized dogs. Five dogs were anesthetized for 3 hours to evaluate changes in serial SEP during general anesthesia. Nonsurgical and surgical manipulations were performed on one hind limb of five dogs to determine the effects of limb positioning and nerve retraction on SEP. In 13 dogs, the ischiatic nerve was exposed surgically and retracted until the SEP deteriorated and disappeared, to determine the relationship between amount of tension on the nerve and the time to complete deterioration of the SEP. Sensory evoked potential waveforms, which consisted of two to five peaks, were stable throughout the anesthetic period. The first two peaks were the most stable. Latency of the first two peaks was the easiest and most reliable parameter to evaluate. Although the peak latency in recordings from the superior hind limb was always slightly longer, SEP recordings from the inferior limb were good controls to monitor nerve function. There was considerable variation in sensitivity to nerve retraction. The technique proved to be a reliable way to monitor nerve function in normal anesthetized dogs.  相似文献   
7.
8.
9.
Abstract. The kinetics of gentamicin and tobramycin in juvenile brown sharks, Carcharhinus plumbeus (Nardo), were studied using a commercially available radioimmune assay (Clinical Assays, Cambridge, Massachusetts). Preliminary recovery studies in vitro demonstrated 95% recovery of antibiotic spiking with no detection of interfacing substances. There were no differences between serum and plasma data using this assay. Both drugs demonstrated distinct two-compartment characteristics. The mean half-life of the alpha component was 5.4±1.0 h for gentamicin and 3.2±0.5 h for tobramycin. The half-lives of the beta components were markedly longer, 54±4.9 h for gentamicin and 48±2 h for tobramycin. The experimental designs could not exclude third compartments. A therapeutic dosage schedule for gentamicin of 2 mg/kg intramuscularly followed by 1 mg/kg at 8 and 72 h was tested. This schedule avoided plasma levels greater than 12μg/ml and troughs greater than 2 μg/ml but more frequent administration may be required to treat infections with bacteria which are less sensitive to aminoglycoside antibiotics. A therapeutic tobramycin schedule of 2.5 mg/kg intramuscularly followed by 1.0 mg/kg, 4 h later and daily thereafter, achieved plasma levels within the human therapeutic range (5.8μg/ml) on the second day of therapy. Levels considered toxic to humans were not reached for 5 days.  相似文献   
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号