Osteosarcoma of the distal femur, combined with multiple bone infarcts: the case of a 10-year-old poodle

A ten-year-old female poodle was presented for left hindlimb lameness. Radiographically, irregular intramedullary densities of long bones (bone infarcts) and a lytic lesion in the left distal femur were detected. Two years after the first examination, the lesions in the distal femur were definitely identified as osteosarcoma and the dog was euthanized. Pathological and histological changes of the bone infarcts as well as of the osteosarcoma are described. Regarding bibliographical data, occurrence and aetiopathogenesis of osteosarcoma associated with multifocal bone infarction in man and dog are discussed.     

Electromyography and spinal evoked potentials in cauda equina syndrome of dogs

In order to investigate usefulness of electrodiagnostic methods in Cauda Equina-Compression, 26 dogs with this disease were subjected to electromyography and spinal evoked potentials. 16 normal dogs served as controls. It was found that--after stimulation of the Nn.tibialis, peronaeus, pudendus and coccygeales and recording at the lumbosacral junction--latencies and nerve-conduction velocities were largely normal. However the amplitudes were decreased and--depending on the severity of the compression--the morphology of the potentials was altered although considerable standard deviations were obtained. Electromyographically, increased spontaneous activity with fibrillations and positive sharp waves were found in the myotomes of the lumbosacral nerves. Their number increased according to the severity of the cauda equina compression and they had a centrifugal distribution pattern. Based on these results it appears indicated to perform an electromyographic exam before applying myelography. The technique of spinal evoked potentials will need more refinement and standardisation before being useful in a clinical situation.     

The study on site quality evaluation for dahurian larch (Larix gmelinii Rupr.)

Site quality of larch (Larix gmelinii Rupr.) in Da Xingan Mountain in Inner Mongolia was studied systematically with about 1000 temporary plots and computer software. The nature of site class and site index curve was discussed in view of general mathematical model of height growth. The height growth of dominant tree of four divisions of forest stands were studied and site index tables were constructed respectively. In order to unify the comparing standard and convenience for management in this region, site index table was constucted too. Based on discussing the action and accuracy of forest type, a series of site quality evaluation (forest type-site index class-site index) was suggested. This subject of study is supported by the National Natural Scientific Fund (No. 39270549).     

非公有制林业主体融资问题的思考

针对不同层次的个体林业,设计了民间融资、"报账制"式银行信贷等方式以求解决个体林农融资困难问题.     

气象干旱-水文干旱传播过程特征及其影响因素——以贵州黔中水利工程区为例

为探究喀斯特区域气象干旱向水文干旱传播过程特征,使用SPI与SRI标准化指数识别区域干旱,采用交叉小波、小波相干、状态转移概率等方法探讨传播强度、响应率等干旱传播特征。结果表明:(1)上世纪60 s和70 s气象干旱、水文干旱的干旱持续时间较短,而80 s与21世纪初期区域干旱持续时间较长;SPI与SRI间呈显著的正相关关系,气象干旱向水文干旱传播的过程需要1.5个月。(2)喀斯特区域的干旱传播强度DPI>1,且响应率偏高,水文干旱对气象干旱的发生极为敏感,尤其是在地表切割深度较浅、岩溶发育较为强烈的区域。(3)传播过程主要受地表切割深度的影响较大,各下垫面条件对干旱传播过程的影响程度依次为地表切割深度>岩溶发育强度>高程>地形地貌,其中,干旱传播特征与地表切割深度呈显著的负相关,与岩溶发育强度、高程、地形地貌呈正相关;在浅切割、中等切割或海拔较低、岩溶发育强烈的区域,各等级间的DPI、Rr的转移较为活跃,整体上传播特征在57年间呈增强的趋势。研究结果旨在为区域干旱防治与监测提供理论依据,尤其是为喀斯特生态环境脆弱区的可持续发展规划提供理论参考。     

称重式油脂添加设备的系统设计分析

<正>饲料生产中添加油脂是为了满足生产高浓度能量饲料的要求,同时还可减少氨基酸氧化,提高氨基酸的消化率;抑制葡萄糖和其它前体物质转化为脂肪;促进脂溶性维生素A、D、E、K和某些激素的吸收