Four seeding methods, including broadcast sowing, feeding seeds to sheep, putting seed bag on sheep and cattle, and mix-seeding were combined with hoof tillage method to improve the degraded mountain grassland where l...Four seeding methods, including broadcast sowing, feeding seeds to sheep, putting seed bag on sheep and cattle, and mix-seeding were combined with hoof tillage method to improve the degraded mountain grassland where large gradient limited the use of machine. The results showed that the most suitable grassland type for hoof tillage was mountain meadow steppe. The optimum reseeding period was early spring, followed by late autumn ; and Sainfoin （Onobrychis sativa） was the most suitable herbage species. The optimum reseeding method was artificial broadcasting in the slope with the gradient 〈 20°, followed by putting seed bag on sheep and cattle. After improvement of hoof tillage, the vegetation coverage increased by 35%, the proportion of high quality herbage increased by 25%, and the fresh yield increased by three to four times.展开更多
In this study Digital Image Correlation (DIC) was adopted to evaluate the mechanical properties of bovine hoof horn. Using specific process, tensile specimens comprised of Zones 4 and 5 of the sole were excised from t...In this study Digital Image Correlation (DIC) was adopted to evaluate the mechanical properties of bovine hoof horn. Using specific process, tensile specimens comprised of Zones 4 and 5 of the sole were excised from the claws of the front and rear hooves of a mature Black Angus cow. After extraction the specimens were conditioned to obtain horn with relative moisture content of either 0% (dry) or 100% (wet) and then subjected to uniaxial tension to failure. The average elastic modulus (E) of all "dry" and "wet" hoof horn was 2870 ± 460 MPa and 102 ± 34 MPa respectively. Similarly, the average proportional limit stress (σ) was 29.0 ± 4.8 MPa and 1.4 ± 0.3 MPa respectively. Although the mechanical properties were dependent on distance from the dermal-epidermal junction, the influence of moisture on mechanical behavior was far greater.展开更多
Unusual head trauma is rare with various mechanisms of occurrence. The injuries can be similar to those of road accidents but sometimes with significant complexities. The objective was to determine the frequency of th...Unusual head trauma is rare with various mechanisms of occurrence. The injuries can be similar to those of road accidents but sometimes with significant complexities. The objective was to determine the frequency of this pathology in our practice, describe the different mechanisms and report the craniocerebral lesions caused by this type of trauma. Materials and Method: This was a descriptive study with retrospective collection spread over a period of 3 years. After selecting the files, the patients and/or their companions were contacted by telephone to inquire about them and then returned to the consultation for reassessment. Disease history and information were obtained from patients’ medical records. Result: The frequency of this pathology was 1.78% and his incidence was 0.4 cases per month. The average age of the patients was 13.47 years. All the victims were male. 41.17% of patients were in school. The mechanisms of trauma were the hoof blow 47.1%, the horn blow 29.4% and the stone blow 11.7% respectively. 23.5% of patients were confused and 11.7% children were in coma. One patient presented an anisocoria. The motor deficit was present in 5 cases. CT-scan made it possible to highlight a skull depressing fracture 58.8% and confirm a craniocerebral wound in 35.3%. The average time between patient admission to hospital and completion of surgery was 24.5 hours. The surgery had consisted of the trimming of cranio-cerebral wounds, exploration, duroplasty and lifting of skull depressing fracture. After 15 months of follow-up, the evolution was favorable in 53.3%, the morbidity was 33.4% and the mortality 17.6%. Conclusion: These are rare but serious conditions because they are fatal and disabling. An early and multidisciplinary management can hope to have a good favorable.展开更多
基金Supported by Science and Technology Research Project of the Xinjiang Uygur Autonomous Region"Application of Hoof Tillage Method to Improve Degraded Mountain Grassland"(20113111-1)
文摘Four seeding methods, including broadcast sowing, feeding seeds to sheep, putting seed bag on sheep and cattle, and mix-seeding were combined with hoof tillage method to improve the degraded mountain grassland where large gradient limited the use of machine. The results showed that the most suitable grassland type for hoof tillage was mountain meadow steppe. The optimum reseeding period was early spring, followed by late autumn ; and Sainfoin （Onobrychis sativa） was the most suitable herbage species. The optimum reseeding method was artificial broadcasting in the slope with the gradient 〈 20°, followed by putting seed bag on sheep and cattle. After improvement of hoof tillage, the vegetation coverage increased by 35%, the proportion of high quality herbage increased by 25%, and the fresh yield increased by three to four times.
基金This work was partially sponsored by the National Science Foundation 0238237(USA)Shanghai Leading Academic Discipline Project, No. Y0103, the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry of China.
文摘In this study Digital Image Correlation (DIC) was adopted to evaluate the mechanical properties of bovine hoof horn. Using specific process, tensile specimens comprised of Zones 4 and 5 of the sole were excised from the claws of the front and rear hooves of a mature Black Angus cow. After extraction the specimens were conditioned to obtain horn with relative moisture content of either 0% (dry) or 100% (wet) and then subjected to uniaxial tension to failure. The average elastic modulus (E) of all "dry" and "wet" hoof horn was 2870 ± 460 MPa and 102 ± 34 MPa respectively. Similarly, the average proportional limit stress (σ) was 29.0 ± 4.8 MPa and 1.4 ± 0.3 MPa respectively. Although the mechanical properties were dependent on distance from the dermal-epidermal junction, the influence of moisture on mechanical behavior was far greater.
文摘Unusual head trauma is rare with various mechanisms of occurrence. The injuries can be similar to those of road accidents but sometimes with significant complexities. The objective was to determine the frequency of this pathology in our practice, describe the different mechanisms and report the craniocerebral lesions caused by this type of trauma. Materials and Method: This was a descriptive study with retrospective collection spread over a period of 3 years. After selecting the files, the patients and/or their companions were contacted by telephone to inquire about them and then returned to the consultation for reassessment. Disease history and information were obtained from patients’ medical records. Result: The frequency of this pathology was 1.78% and his incidence was 0.4 cases per month. The average age of the patients was 13.47 years. All the victims were male. 41.17% of patients were in school. The mechanisms of trauma were the hoof blow 47.1%, the horn blow 29.4% and the stone blow 11.7% respectively. 23.5% of patients were confused and 11.7% children were in coma. One patient presented an anisocoria. The motor deficit was present in 5 cases. CT-scan made it possible to highlight a skull depressing fracture 58.8% and confirm a craniocerebral wound in 35.3%. The average time between patient admission to hospital and completion of surgery was 24.5 hours. The surgery had consisted of the trimming of cranio-cerebral wounds, exploration, duroplasty and lifting of skull depressing fracture. After 15 months of follow-up, the evolution was favorable in 53.3%, the morbidity was 33.4% and the mortality 17.6%. Conclusion: These are rare but serious conditions because they are fatal and disabling. An early and multidisciplinary management can hope to have a good favorable.
