Successful return to work after surgical repair of fracture of the medial condyle of the distal femur in two working farm dogs

CASE HISTORY: A 5-year-old male Heading dog (working Collie) and a 2-year-old female Huntaway each presented with non-weight-bearing lameness of a hindlimb after jumping or falling with the leg trapped in a gate or motorbike carrier.

CLINICAL FINDINGS: Pain and swelling were localised to the stifle, and radiographs revealed a fracture of the medial condyle of the distal femur in each case.

DIAGNOSIS: Medial unicondylar, intra-articular fractures of the distal femur.

CLINICAL RELEVANCE: Open reduction and internal fixation provided an excellent outcome in each case. Open reduction was achieved after elevation of the insertion of the medial collateral ligament from the proximal tibia. Both cases had severe tears to the caudal pole of the medial meniscus, requiring partial meniscectomy. Internal fixation was applied using either divergent K-wires and a biodegradable pin, or a lag-screw technique. The medial collateral ligament was reattached using a 3.5-mm cancellous screw and spiked washer. The therapeutic outcome, i.e. clinical result and return to work, was determined by gait assessment, physical examination, radiography, and an owner's questionnaire. Both working dogs became sound and successfully returned to full work within 6 months of surgery. One dog was subject to euthanasia due to unrelated disease one year after surgery, but the other dog was working fully at 2 years post-operatively; radiography showed osteoarthrosis (OA) but manipulation revealed near-normal range of motion and no loss of muscling.     

Water uptake through sweet cherry (Prunus avium L.) fruit pedicels: Influence of fruit surface water status and intact fruit skin

A modified potometer consisting of a water-filled glass tube mounted in parallel with a metric scale and connected to a fruit was used to study water uptake into detached fruits of sweet cherry. Results describing quantities of imported water from some introductory studies were in the same range as in previously published studies conducted with alternative methods. Water uptake was measured in fruits of four cultivars kept in air of approximately 50±5% RH followed by immersion in water 1–2 h into the experimental period. This caused a significant decrease in water uptake. However, the fruits continued to accumulate water at a reduced rate. When the fruits were dried, the water uptake immediately increased to the same level as before the immersion in water. The fruit skin of two cultivars was exposed to normal air after being ruptured with four shallow cuts to simulate cuticular fractures or shallow cracks. These two treatments did not give statistically different water uptake through the pedicel, although there was a tendency to an increased rate of water uptake in fruits with ruptured fruit skin.     

Effects of water flow rate on growth rate,mortality and biomass return of abalone in slab tanks

The capital‐intensive nature of land‐based abalone farming demands that infrastructure be fully utilized. This study investigated whether the negative impact of high stocking density in shallow raceway tanks could be ameliorated by optimizing water flow. We quantified the effect of flow rate (87–246 L min^?1) on the performance of 2‐year‐old hybrid abalone (Haliotis laevigata and Haliotis rubra) held at two stocking densities (11400 and 7600 tank^?1). A 50% higher density yielded a 27% increase in biomass gain, despite a 10% growth reduction and 3% higher mortality. At the lower density, there was an optimal flow rate of approximately 200 L^?1, at which biomass gain was 474 kg and the feed conversion ratio (FCR) was 1.31. At the higher density, biomass gain (max = 658 kg) and FCR (min = 1.41) improved linearly with increasing flow, suggesting that an optimal flow rate exists at 246 L^?1 or beyond those tested. Increased oxygen availability with increasing flow is thought to have enhanced abalone performance, although flows greater than 200 L min^?1 may have reduced performance at low density due to feed washout and nutrient leaching. Overall, greater financial return per tank was favoured by the combination of high stocking density and high water flow.     

环境因子对无土栽培甜椒脐腐病发生率的影响

生理性病害--番茄、甜椒脐腐病与果实中缺钙有关.为了探明空气相对湿度(RH)、基质条温度和湿度等环境因子对无土栽培甜椒脐腐病发生率的影响,进行了一系列试验.共设置了12种试验处理,包括提高空气相对湿度到60%、对照;基质条冷却至17 ℃、对照;基质条湿度设定为50%、60%、由定时器控制.结果表明,提高RH可明显缓和温室内RH和气温的日变化;显著增加果实中维管束数量,果实顶端和基部其维管束数量分别比对照温室的高14.6%和11.4%;可显著提高果实中的钙含量,其中果实顶端和基部分别比对照温室高19.9%和16.6%,从而降低脐腐病的发病率.果实和叶片中钾含量未受RH高低的影响.基质条冷却可提高根基氧含量,这有利于提高根系活力.RH、基质条温度和湿度这3种环境因子对甜椒脐腐病的发生率的影响有累积效应.但处理间果实数量和产量差异不显著.     

T形板肋对预制带肋底板混凝土叠合板弯曲疲劳性能的影响

为研究T形板肋对预制带肋底板混凝土叠合板弯曲疲劳性能的影响,对3块T形肋底板叠合板和1块整浇板进行弯曲疲劳性能对比试验,主要考察T形板肋与疲劳荷载幅值对试件疲劳破坏形态及疲劳损伤程度的影响,得到了在不同疲劳循环加载次数下的跨中动位移、混凝土应变、预应力筋应变、残余变形等,分析了在不同疲劳循环加载次数下的刚度退化情况、荷载-应变分布规律、裂缝分布规律及剩余承载力等。研究结果表明,经历200万次疲劳循环加载后,T形肋底板叠合板无明显的刚度和强度退化,增设T形板肋的叠合板能达到与整浇板相同的弯曲疲劳性能;T形肋底板叠合板正截面弯曲疲劳强度计算可采用普通预应力混凝土受弯构件正截面疲劳应力验算的4个假定,最终以此建立了其正截面弯曲疲劳强度验算方法。     

人工关节置换治疗高龄股骨粗隆间骨折

目的：了解人工关节置换治疗高龄股骨粗隆间骨折的疗效。方法：采用人工股骨头置换治疗80岁以上高龄股骨粗隆间骨折33例,术后按髋关节活动度、疼痛程度及生活自理情况作疗效评定指标。结果：33例中2例死亡,其余31例经l～3a随访,按Harris评分优良率达83．9％,无一出现假体松动及下沉。结论：人工关节置换治疗高龄股骨粗隆间骨折近期效果满意,在临床上是可行的。     

STRESS FRACTURES OF THE HUMERUS, RADIUS, AND TIBIA IN HORSES

The medical records, radiographic and nuclear scintigraphic findings of 26 racing horses with 27 stress fracture episodes of the humerus, radius, or tibia were reviewed. The purposes of this study were to describe the radiographic and/or scintigraphic features of stress fractures of the humerus, radius, or tibia, and to evaluate the signalment and history of horses in which stress fracture occurred. Stress fractures of the three long bones examined were primarily seen in 2-and 3-year-old male Thoroughbred horses; commonly, the onset of lameness was immediately following training gallops or racing. There were 13 humeral stress fracture episodes in 12 horses. Ten were in the proximal caudolateral cortex, and three were in the distal craniomedial cortex. Radial stress fractures were seen in three horses, all in the midshaft radius. Tibial stress fractures were diagnosed in 11 horses. They were located in the proximal lateral tibia in six horses, the distal caudolateral tibia in three horses, and the midshaft tibia in three horses. Fifteen stress fractures were diagnosed with radiographs alone, one was diagnosed with scintigraphy alone, nine were diagnosed with radiographs and scintigraphy, and, in two horses, radiographs were negative, but the scintigraphic findings were consistent with stress fracture.     

木束条尺寸对杉木积成材性能的影响研究

为了探索较佳的木束条尺寸,以提高杉木积成材的质量,研究了不同尺寸的杉木木束条对杉木积成材性能的影响规律,结果表明:木束条的长度对杉木积成材的纵向静曲强度、弹性模量、24h吸水厚度膨胀率有较大的影响;木束条的厚度对杉木积成材纵向静曲强度、弹性模量的影响不大,但对24h吸水厚度膨胀率、内结合强度有较大的影响;木束条的宽度对杉木积成材的物理力学性能影响极小,不存在统计意义上的影响;木束条的较佳尺寸为:长度120 mm,宽度4mm,厚度2.5 mm.     

砼面板堆石坝趾板CAD软件的研制与应用

混凝土面板堆石坝趾板的设计过程是一个迭代与优化的过程，趾板设计参数的最终确定是在施工过程中完成的，根据趾板的设计特点和内容，采用VB6.0作为开发平台，结合Fox-Pro6.0，并以嵌入AutoCAD的方法，编制了趾板CAD软件。该软件可快速方便地进行趾板设计参数的确定和图形绘制。