A COMPARISON OF THE ROSTROCAUDAL OPEN MOUTH AND ROSTRO 10° VENTRO-CAUDODORSAL OBLIQUE RADIOGRAPHIC VIEWS FOR IMAGING FLUID IN THE FELINE TYMPANIC BULLA

Fluid within the tympanic bulla is an indication of middle ear disease. Radiography has a relatively low accuracy for the detection of soft tissue opacification in the tympanic bulla, and the most useful radiographic projection, the rostrocaudal open mouth (RCd (open mouth)), is technically difficult to perform in dogs and cats. An alternative projection for the feline tympanic bulla, the rostro 10 degrees ventro-caudodorsal oblique (R10 degrees V-CdDO), was compared to the RCd (open mouth) in 41 feline cadaver heads with the tympanic bullae randomly filled with KY jelly. Computed tomography was used as the gold standard. Each tympanic bulla was recorded as being positive or negative for soft tissue opacification. Although there was no significant difference between the accuracy of the two views, the R10 degrees V-CdDO was subjectively more accurate and easier to perform, and in a live patient may be performed without the need for general anesthesia. The R10 degrees V-CdDO projection is a good alternative to the RCd (open mouth) projection for detecting otitis media in the cat.     

EXCRETORY UROGRAPHY BY INTRAOSSEOUS INJECTION OF CONTRAST MEDIA IN A RABBIT MODEL

There are many indications for an intravenous excretory urogram. However, where intravenous access is not available, the intraosseous route to the circulation may be an alternative. We found that safe and diagnostic excretory urograms could be obtained in rabbits following the injection of different contrast media via the intraosseous route. In fact, these excretory urograms were indistinguishable from ones obtained by the conventional intravenous route. While the rabbits did not develop any abnormal clinical signs following the procedure, there were postmortem histologic lesions of osteochondrosis in 5 of 22 (22.7%) tibias receiving an intraosseous needle, but in none of the 14 tibias that did not receive an intraosseous needle. Further, the use of diatrizoate was associated with the development of osteochondrosis while the use of iopamidol was not.     

Mammary development and milk production in the sow: Effects of udder massage, genotype and feeding in late gestation

The primary aim of the study was to investigate whether post-ejection udder massage 1–2 weeks pp (post partum) had an effect on the amount of mammary tissue and milk production in the domestic sow.

The nursing behaviour of 35 primiparous LYL or YLY sows and their litters was followed on days 7 and 14 pp. The milk production was measured by the weigh–suckle–weigh method of the whole litter on days 11 and 18 pp. After weaning on day 28 pp, the sows were slaughtered and the mammary tissue excised and weighed.

No significant correlations were found between the duration of post-ejection udder massage and the subsequent milk production. LYL sows had more mammary tissue (P < 0.05) and their piglets spent more time performing post-ejection udder massage compared to the YLY sows (P < 0.01). Individual variation was found in the proportion of time that the sows were lying on either their right or left side. The weight of the mammary tissue from the left side was positively affected by the amount of udder massage (pre- and post-ejection massage) that the sows had received while lying on the right side relative to the amount that she had received while lying on the left side on day 7 pp (P < 0.01).

In conclusion, the intensity of udder massage influenced the amount of mammary tissue at slaughter. The genotype of the sow affected the expression of nursing behaviour and milk production. No connection was found between post-ejection udder massage and the measures of milk production 1–2 weeks pp. Finally, feeding during the last half of gestation affected the nursing behaviour.     

鹅掌楸容器育苗轻基质配方研究

选用泥炭、稻壳、森林表土、黄心土混合配制成5种轻基质配方,开展鹅掌楸容器育苗技术研究。结果表明:不同轻基质配方之间的重量,容器苗苗高、地径、根系、单株干物质重量达到极显著差异;4号轻基质配方(泥炭50%+稻壳20%+森林表土20%+黄心土10%)育苗效果最好,苗木粗壮、根系发达、基质重量较轻;1号轻基质配方(泥炭20%+稻壳50%+森林表土20%+黄心土10%)效果最差。研究认为:在鹅掌楸容器育苗生产上宜选用4号轻基质配方。     

校园视频直播系统的设计与实现

很多学校经常举办大型的会议、论坛、名人讲座和文艺汇演,由于参加人数众多,经常会出现会议场地不够的情况.因此,建立规模适度、经济可行且先进可靠的校园视频直播系统是各学校都在寻求的解决方案.本文从实际出发来探讨校园视频直播系统的设计与实现.     

不同培养基对肠球菌的检测效果比较

肠球菌是食品、水、食品加工设备和食品生产环境等卫生状况的指示菌之一,对其进行检测的培养基种类较多。选用叠氮化钠葡萄糖肉汤和肠球菌肉汤对奶粉和水中肠球菌进行检测比较,结果表明,肠球菌肉汤具有绝对的优势,但在实际检测工作中,对不同样品进行检测时,应注意根据样品的性状合理选择培养基,以提高检测的速度和准确性。     

配方施肥对基质栽培樱桃番茄产量、品质和环境的影响

采用有机肥配方施肥和常规营养液基质栽培樱桃番茄的试验结果表明：采用鸡粪＋花生麸、鸡粪＋ 茶麸和鸡粪＋ 花生麸＋ 茶麸等有机肥的配方施肥，可提高樱桃番茄产量、改善品质、降低成本并增加收入；纯鸡粪处理较对照减产，鸡粪加少量复合肥则增产增收。鸡粪＋ 茶麸处理的灌溉排出液硝酸盐含量低，对环境无污染。     

谈红皮云杉“全光下雾插“育苗介绍

从生物培育技术角度分析介绍了利用喷雾设备提高红皮云杉在全光条件下扦插成活率的方式方法。     

接种AM真菌对不同育苗基质中甜椒苗期生长的影响

研究比较普通土、秸秆有机土和草碳蛭石3种育苗基质中接种两种丛枝菌根真菌GM、GV对甜椒苗期生长的影响，结果表明：在营养含量较高的有机土育苗基质中，接种AM真菌对甜椒苗的影响最弱，而在营养水平较低的草碳蛭石无土育苗基质中，接种AM真菌对甜椒苗有显著的促进作用，其中AM真菌在草炭蛭石中对甜椒苗根系的侵染率也最高，而GM的接种效果优于GV。     

灰木莲容器苗培育基质筛选试验

以松皮粉、黄心土、森林表土、火烧土、泥炭5种基质设置6种配比处理开展灰木莲容器苗培育试验，选用苗高、地径、苗木质量指数、容器基质重量等指标进行苗木质量评定，并依据造林效果进行检验。结果表明：不同处理间的苗高、地径和容器基质重量均达到极显著差异，苗木质量指数亦差异显著；处理3（黄心土50％＋松皮粉25％＋表土25％）的苗木质量和造林效果最好，其次是处理5（黄心土60％＋松皮粉25％＋火烧土15％）和处理4（黄心土50％＋松皮粉50％），处理2（黄心土75％＋泥炭25％）最差；建议生产上添加25％．50％的松皮粉作为灰木莲容器育苗基质。