Surgical stapling for repair of a rectal tear in a horse   总被引：1，自引：0，他引：1  

R H Stewart  J T Robertson 《Journal of the American Veterinary Medical Association》1990,197(6):746-748

A grade-4 rectal tear in a mare was successfully repaired per rectum, using a surgical stapling device. The mare had only minor postoperative complications. This technique has some advantages over previously described procedures, but should be reserved for use in selected cases.  相似文献   

Sectional notes     

M. A. Lindsay  C. H. Metzger  John R. Robertson  W. B. Ward  Verne C. Beverly  E. R. Jackman  John Noonan  H. R. Talmage 《American Journal of Potato Research》1946,23(8):304-312

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THE EVOLUTION OF HERBS     

Robertson C 《Science (New York, N.Y.)》1916,44(1140):638-639

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Sectional notes     

B. A. Brown  John R. Robertson  W. B. Ward  Verne C. Beverly  H. A. Reiley  Joe Shaughnessy  H. J. Evans  Earl B. Tussing  E. R. Jackman  O. D. Burke  K. W. Lauer  John Noonan  Zola M. Fineman 《American Journal of Potato Research》1946,23(12):430-445

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Some genetic characteristics of the freely drained soils of the ettrick association in East Scotland     

J.C.C. Romans  L. Robertson 《Geoderma》1975,14(4):297-317

This paper describes the interrelated characteristics of the freely drained soil series of the Ettrick Association. These soils are extensively developed in the Southern Uplands of Scotland on glacial drift derived from greywacke.At the present day the soils of the Linhope series are acid brown soils whereas the Minchmoor and Dod series include podzols and peaty podzols. Subalpine podzols and alpine soils are included within the Merrick series. It is concluded that the soils of the Linhope, Minchmoor and Dod series were all formerly brown forest soils under deciduous woodland. They have evolved to their present status after forest clearance which gathered momentum after the widespread establishment of monastic institutions in Scotland in the twelfth and thirteenth centuries A.D. The evolutionary outline of profile development is described and discussed.  相似文献   

不同利用方式对贝加尔针茅草原土壤活性有机碳的影响     

荆佳强  萨仁其力莫格  秦洁  张海芳  李明  杨殿林 《草业学报》2022,31(1):47-56

土壤活性有机碳能够准确反映土壤有效性,表征土壤质量变化,是探索可持续草地管理措施的关键指标之一。以内蒙古贝加尔针茅草原为研究对象,采用围封、放牧和刈割野外控制试验,探讨不同利用方式对土壤有机碳（SOC）和活性有机碳的影响,发现不同利用方式下土壤SOC含量表现为围封>刈割>放牧,其中围封区和刈割区土壤SOC含量显著大于放牧区,围封区与刈割区土壤SOC含量差异不显著,在土壤活性有机碳中土壤可溶性有机碳（DOC）含量表现为放牧>围封>刈割。土壤微生物量碳（MBC）和土壤易氧化有机碳（ROC）含量均表现为围封>刈割>放牧,围封区与刈割区土壤MBC和土壤ROC平均含量差异不显著,且均显著大于放牧区。土壤MBC、ROC和SOC之间呈极显著相关性（P<0.01）。土壤ROC和土壤MBC与土壤全氮和土壤全磷呈极显著相关性（P<0.01）。围封与刈割有利于土壤SOC、MBC、ROC的提升,放牧对土壤DOC有一定累积作用。围封和刈割增强了土壤SOC的稳定性,活性有机碳与土壤有机碳和土壤理化性质密切相关,能够敏感地反映土壤有机碳的变化。  相似文献   

基于EDA技术的自动立木整枝机无线遥控发射系统   总被引：4，自引：0，他引：4  

张俊梅  李文彬  撒潮  王德明  田勇臣 《林业机械与木工设备》2006,34(10):23-26

立木整枝是优质工业用材林定向抚育的重要环节,采用自动立木整枝机是实现高效、高质量和安全可靠整枝的有效途径。本文综合运用电子电路设计及优化技术、无线遥控及通信编解码技术,创造性地研制了基于CPLD的无线数字编码抗干扰自动立木整枝机无线遥控发射系统,通过优化CPLD内部逻辑电路有效消除了逻辑竞争冒险、降低了噪声干扰,确保了系统逻辑设计的正确性。该系统具有可靠、节能、抗干扰、工作效率高等优点。本研究成果及方法为推进其他林业机械的自动化与智能化进程提供了一种有效的新思路。  相似文献   

Bursaphelenchus fungivorus (Nematoda: Aphelenchida) associated with Orthotomicus erosus (Coleoptera: Scolitydae) in Spain     

M. Arias  L. Robertson  A. Garcia‐Alvarez  S. C. Arcos  M. Escuer  R. Sanz  J. P. Mansilla 《Forest Pathology》2005,35(5):375-383

A survey of the xylophagous insects in the conifer forests, mainly Pinus pinaster woodlands, in Spain was carried out in order to study the phoretic vectors of nematodes of the genus Bursaphelenchus. Fifteen environmental sites were characterized on the bases of altitude, rainfall, temperature and conifer species. Specimens of Orthotomicus erosus (n = 3476) were captured of which 59% carried nematodes under their elytrous, most of them were aphelenchid fungal‐feeding nematodes, but B. fungivorus was found on the beetles from Las Cumbres, Villa Blanca, (Huelva), southern Spain, which represent the first record of O. erosus as vector of a Bursaphelenchus sp. The nematode is characterized by morphometric and biomolecular techniques and distribution and ecology of the insect is discussed.  相似文献   

A VALENTINE‐SHAPED CARDIAC SILHOUETTE IN FELINE THORACIC RADIOGRAPHS IS PRIMARILY DUE TO LEFT ATRIAL ENLARGEMENT          下载免费PDF全文

Trisha J. Oura  Aisha N. Young  Bruce W. Keene  Ian D. Robertson  Dennis E. Jennings  Donald E. Thrall 《Veterinary radiology & ultrasound》2015,56(3):245-250

Conflicting information has been published regarding the cause of a valentine‐shaped cardiac silhouette in dorsoventral or ventrodorsal thoracic radiographs in cats. The purpose of this retrospective, cross‐sectional study was to test the hypothesis that the valentine shape is primarily due to left atrial enlargement. Images for cats with a radiographic valentine‐shaped cardiac silhouette and full echocardiography examination were retrieved and independently reviewed. A subjective scoring system was used to record severity of radiographic valentine shape. Subjective radiographic evidence of left atrial enlargement in a radiographic lateral projection and a final diagnosis based on medical records were also recorded. A total of 81 cats met inclusion criteria. There was a strong positive correlation (P < 0.001) between echocardiographic left atrial size and severity of radiographic valentine shape. There was no effect of echocardiographic right atrial size on the severity of valentine shape, except when concurrent with severe left atrial enlargement. In this situation, right atrial enlargement increased the likelihood of observing a severe valentine shape. There was no effect of right atrial enlargement on the shape of the cardiac silhouette when left atrial enlargement was absent or only mild to moderate. There was no correlation between the category of final diagnosis of cardiac disease and the severity of valentine shape. Findings from this study supported the hypothesis that a valentine‐shaped cardiac silhouette in radiographs is due primarily to left atrial enlargement in cats, with right atrial enlargement only impacting the shape if concurrent with severe left atrial enlargement.  相似文献   

Effect of N‐butylscopolammonium bromide on equine ileal smooth muscle activity in an ex vivo model          下载免费PDF全文

K. A. Hart  C. E. Sherlock  A. J. Davern  T. H. Lewis  T. P. Robertson 《Equine veterinary journal》2015,47(4):450-455

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