吉林麦饭石对鸡甲状腺、肝脏组织结构的影响

用光镜和电镜观察了补饲吉林麦饭石鸡的甲状腺和肝脏组织结构。结果:实验组鸡甲状腺呈现一系列功能旺盛的结构象,肝细胞中肝糖元数量增加。此外,讨论了造成这些结构变化的原因。     

阻尼RLW方程弱解的后向唯一性

在文[1]工作基础上,本文证明了阻尼RLW方程的弱解也具有后向唯一性。     

The use of atropine to control heart rate responses during detomidine sedation in horses

Detomidine is a sedative-analgesic which has a pharmacological profile similar to xylazine. There is evidence that the sedative effects are mediated through alpha-2 adrenoceptors.Cardiopulmonary responses were determined using detomidine as the principal agent and as a preanesthetic prior to the induction of general anesthesia. Compatibility with guaifenesin, sodium thia-mylal and halothane were determined.As in the case of xylazine, detomidine produces a slowing of heart rates. This was found to be either sinus bradycardia or heart block. There may be a corresponding increase in systolic blood pressures. The respiratory pattern is altered through the arterial blood gases and pH data supported evidence of adequate ventilation. The heart rate response to detomidine without anticholinergic treatment was transient and related to he duration of drug action.Atropine sulfate, 0.02 mg/kg i.v. was effective in preventing or treating bradycardia or heart block from detomidine. Heart rates also increased during the administration of guaifenesin and sodium thia-mylal when given 50 min poisit-detomidine.     

EVALUATION OF FATTY INFILTRATION OF THE LIVER IN DAIRY CATTLE THROUGH DIGITAL ANALYSIS OF HEPATIC ULTRASONOGRAMS

Ultrasonography of the liver of 49 Holstein-Friesian cows was performed, liver specimens were taken, examined microscopically and the fatty occupying rate (FOR) was calculated. Echoes from the hepatic B-mode ultrasonograms were quantified as histogram mean (Emean) and histogram mode (Emode) of echo amplitudes within various areas at a depth of 1–9 cm from the hepatic surface. Of the 49 animals, 26 had a normal liver and 23 had fatty infiltration of the liver, diagnosed through histopathological examination. Fatty occupying rate ranged from 1.7 to 64.5%, with 11 animals having 1–15% FOR (mild fatty infiltration), 6 having 15.1–30% FOR (moderate fatty infiltration) and 6 having > 30% FOR (severe fatty infiltration). At 1 cm, severe fatty infiltration had higher Emean and Emode than normal liver (p < 0.05). At 7 cm and 9 cm, moderate and severe fatty infiltration had lower Emeans and Emodes than normal liver (p < 0.001). The results suggest that digital analysis of hepatic ultrasonogram can be useful in the evaluation of the degree of fatty infiltration of the liver in dairy cattle.     

地物反射光谱的测试

本文讨论了双向反射率分布函数、双向反射率、双向反射率因子等光谱反射率之间的关系,并指出了在一定条件下,遥感技术中野外测量地物反射光谱所得的双向反射率因子和物理学中惯用的光谱反射率即半球反射率定义(全部反射光功率与入射光功率之比)是完全一致的.最后还讨论了在野外测量地物反射光谱时需要注意的几个具体问题.     

透明质酸(HA)的功能性及生产技术研究进展

透明质酸 (Hyaluronicacid简称HA)是一种国际上公认的生物大分子保湿剂 ,用于眼科显微手术、关节炎治疗、高级化妆品、妇产科等领域。综述了目前国内外对透明质酸的化学结构、理化性质、应用及生产方法等方面的研究现状 ,对透明质酸的线性结构、超强吸水性以及它与水结合成的弹性透明水化膜在润肤、恢复软组织及妇产科临床方面的应用作了较详细的论述 ,对采用动物组织为原料的提取法和采用兽疫链球菌等为菌种的发酵法作了系统总括     

Detection of anticoagulant rodenticides (4-hydroxycoumarins) by thin-layer chromatography and reversed-phase high-performance liquid chromatography with fluorescence detection

The detection of 4-hydroxycoumarin rodenticides in poisoned domestic animals requires a highly sensitive method as tissue and serum levels of anticoagulants may be very low owing to rapid elimination, metabolism or post-mortem degradation. Thin-layer chromatography (TLC) and reversed-phase high-performance liquid chromatography (RP-HPLC) with fluorescence detection were used to identify the anticoagulants in spiked tissues and in suspicious samples. The analysis of ten suspicious samples highlighted the limitations of both methods. Only the three samples of baits were found positive by TLC whereas one of the five anticoagulants was detected in eight samples by RP-HPLC with fluorescence detection. Therefore, RP-HPLC with fluorescence detection proved to be the more sensitive method for detecting low levels of 4-hydroxycoumarins in blood serum, liver and ingesta, whereas TLC is usually sufficient for analysing baits.Abbreviations RP-HPLC reversed-phase high-performance liquid chromatography - TLC thin-layer chromatography     

新生仔猪肝脏胰腺和胃发育的初步研究

试验研究了1～7日龄仔猪肝脏、胰腺和胃的生长发育。结果表明,自然哺乳仔猪3日龄的肝脏、胰腺和胃的绝对重量分别较初生时增加了94.09%P<0.01、101.53%P<0.01和74.25%P<0.01,而同期体重才增加了24.3%P<0.05,而4～7日龄其绝对重量的增加有所降低,分别为64.86%P<0.01、52.75%P<0.01和55.85%P<0.01,同期体重增加了63.8%P<0.01因此,1～3日龄肝、胰腺和胃的发育较4～7日龄的迅速。     

Correlation between myocardial interstitial collagen remodeling and changes in hemodynamics in rats with myocardial infarction

AIM: To study the relationship between cardiac extracellular matrix remodeling and cardiac function after myocardial infarction. METHODS: We observed sequential changes in collagen contents and collagen Ⅰ/Ⅲ ratios in infarct zone (IZ) and non-infarct zone (NIZ) and their relationship to the parameters of left ventricular systolic and diastolic function in the rat model of myocardial infarction induced by ligation of left main coronary artery. RESULTS: Collagen conteants in IZ and NIZ after 3d of myocardial infarction were significantly higher than those in sham group at corresponding time (P<0.05, P<0.01). Collagen Ⅰ/Ⅲ ratio in IZ decreased on day 3, significantly increased after 7 d (P<0.01). Collagen Ⅰ/Ⅲ ratio in NIZ increased significantly afte14 d. Correlated analysis between collagen contents in IZ or NIZ and collagen type Ⅰ/Ⅲ ratio and maximal ascending velocity (+p'_max) or maximal descending velocity of the left ventricular pressure (-p'_max) was performed and the negative correlation between collagen contents in NIZ and +P'_max (r=-0.589, P>0.05) and -P'_max (r=-0.788, P<0.01) was found. Collagen content in IZ positively correlated to the +P'_max (r=0.70, P<0.50), but not to -P'_max (r=-0.29, P>0.05). Collagen type Ⅰ/Ⅲ ratios in NIZ correlated negatively to the +P'_max (r=-0.504, P>0.05) and -P'_max (r=-0.545, P>0.05), but there were no relationship between collagen type Ⅰ/Ⅲ ratios in IZ and +P'_max or -P'_max in IZ. CONCLUSION: Collagen deposition in IZ after myocardial infarction was of benefit to improvement of systolic function. Collagen deposition in NIZ was harmful to systolic and diastolic function.     

犬瘟热琼脂扩散试验方法的建立及初步应用

采用犬瘟热鸡胚成纤维细胞弱毒疫苗免疫绵羊制备琼脂扩散抗体，应用犬瘟热病貉肝脏（电镜检查“＋＋”以上）制备琼脂扩散抗原，建立了琼脂扩散试验方法，用于犬瘟热病死动物肝、脾脏器中病毒抗原成分的检出。检测送检病料１０份，与电镜检查结果比较，阳性符合率为８５．７％（６／７），阴性符合率为７５％（３／４），总体符合率为９０％（９／１０）。本方法特异、敏感，操作简便，易于推广应用。