Bioavailability of ascorbyl phosphate calcium in hybrid catfish,Clarias macrocephalus (Gunther) × Clarias gariepinus (Burchell) feed

A 10-week feeding experiment was performed in hybrid catfish (Clarias macrocephalus (Gunther) × C. gariepinus (Burchell, 1822) with initial average weight of 1.17 g, in glass aquaria of 200-L capacity. The experiment comprised seven treatments with three replicates each. Ascorbyl phosphate calcium (APCa) was included at 30, 75, 150, 300 and 1000 mg kg⁻¹ feed and compared with one with ascorbyl polyphosphate (APP) at 36 mg kg⁻¹ feed and one without vitamin C supplementation. Fish fed APCa-supplemented feed showed better growth, feed conversion ratio, survival rate and protein utilization compared with those without such supplementation. Ascorbate concentrations in liver and head kidneys were correlated closely with dietary APCa levels. Vertebral collagen and hydroxyproline contents were significantly lower in the fish group without ascorbate supplementation. Red blood cell and white blood cell counts showed no correlation with vitamin C supplementation. Serum protein level was lowest in the group fed feed without vitamin C supplementation and this was lower than those fed feed with APCa and APP supplementation. The fish fed APCa- and APP-supplemented feed showed no difference in serum protein levels. External scorbutic symptoms and histopathological changes of gill tissue were noted in fish fed feed without APCa supplementation. The study indicates that 12.6 mg kg⁻¹ of ascorbic acid molar equivalent supplied as APCa (30 mg kg⁻¹) provided maximum growth and no gross signs as well as histological changes resulting from vitamin C deficiency.     

粉末等离子弧堆焊工艺在修复农机零件中的应用

对粉末等离子弧堆焊工艺用于修复磨损的锤片、犁铧、钉齿和螺旋挖沟机叶片等四种零件进行了试验研究。优选出两种合金粉末并选配一种合金粉末,确定了堆焊部位、焊层厚度和堆焊各零件的工艺规范参数。室内磨损试验及生产试验均证明了修复零件的使用寿命比新品提高一倍以上,作业成本降低49％-77％。     

计算机病毒传染的防止

讨论了一种修改中断以及检测内存和文件长度来检查和预防某些计算机病毒的方法,同时对所编程序中使用的主要技术作了比较详细的说明。     

Use of a semitendinosus myocutaneous flap for soft-tissue reconstruction of a grade IIIB open tibial fracture in a dog

OBJECTIVE: To describe the clinical use of a semitendinosus myocutaneous flap for soft-tissue reconstruction of a grade IIIB open tibial fracture. STUDY DESIGN: Case report. ANIMALS: A 5-year-old castrated male Labrador retriever with a grade IIIB open tibial fracture. METHODS: A myocutaneous flap was created by elevating the origin of the semitendinosus muscle and the associated overlying skin. The flap was rotated distally based on the distal vascular pedicle into a soft-tissue defect overlying the central and distal third of the tibia. RESULTS: The flap allowed one-stage reconstruction of a severe soft-tissue defect overlying denuded bone in a grade IIIB open tibial fracture. The muscular portion of the flap survived; however, there was necrosis of 3 cm of skin extending distally beyond the muscular portion of the flap. CONCLUSION: Distal rotation of the semitendinosus muscle and overlying skin can be used in the treatment of severe soft-tissue defects of the canine crus. CLINICAL RELEVANCE: Complex soft-tissue injuries to the canine crus can be treated with a myocutaneous flap as a reasonable alternative to other reconstructive techniques.     

鸡蛋提取物角蛋白及鸡蛋黄对兔伤口愈合的临床研究

为了探讨鸡蛋提取物角蛋白及鸡蛋黄对伤口愈合影响的临床研究,取健康家兔12只,随机分为A、B两组,每组6只,在每只家兔脊背两侧设试验伤口和对照伤口各1个,即同体不同部位对照试验;A组试验处伤口涂抹鸡蛋提取物角蛋白;B组试验处伤口涂抹生鸡蛋黄;A、B两组对照处伤口均未作任何处理。结果表明:A组和B组涂抹鸡蛋提取物角蛋白和生鸡蛋黄的伤口愈合时间比未做任何处理的伤口愈合快3～4 d,无论是愈合速度还是愈合效果均非常明显且伤口感染率减少,伤口愈合的疤痕减淡,外部更加美观自然,且能达到祛疤美容效果。     

MAGNETIC RESONANCE IMAGING FINDINGS OF EQUINE SOLAR PENETRATION WOUNDS

The magnetic resonance (MR) imaging features, signalment, clinical history and outcome of 55 horses with a penetrating sole injury were evaluated. Our aim was to describe MR imaging findings within the hoof capsule, assess the utility of the technique and give recommendations for the optimal MR imaging protocol to evaluate such injuries. Data from five equine hospitals were analyzed retrospectively. The tract was more likely to be visualized in animals scanned within the first week postinjury. There was no significant predisposition based on breed, age, or gender. T2*W transverse sequences were the most useful for assessment of solar penetrations due to their orientation perpendicular to the deep digital flexor tendon, the reduced scanning time, and the T2* capability of enhancing magnetic susceptibility caused by hemorrhage.