淀粉基生物降解塑料初探

研究了以硝酸铈铵为引发剂，甲基丙烯酸甲酯与玉米淀粉的接枝共聚反应，探讨了反应温度，反应时间、原料配比、加料顺序对反应的影响，并研究了酸对反应的影响，求得了接枝率和接枝效率。     

章古台沙地樟子松嫁接红松技术的研究

利用樟子松作砧木,以红松作接穗,改变了红松对立地条件要求较高的生物学特性,扩大了红松的栽培范围。试验表明:在章古台沙地经嫁接的红松生长发育良好,并正常开花结实,径生长量为樟子松的117.8%,材积为146.38%,其木材产值是樟子松的4.4倍。     

壳聚糖与丙烯酰胺接枝聚合反应的研究

以硝酸铈铵作为引发剂,将壳聚糖与丙烯酰胺接枝聚合得到改性的壳聚糖-丙烯酰胺聚合物。结果表明,其最佳反应条件为温度30℃,时间4h,硝酸铈铵引发剂浓度0.4mmol/L,壳聚糖与丙烯酰胺单位比例为1∶7。     

Penetrating keratoscleroplasty and bimodal grafting for treatment of limbal melanocytoma in a dog

A 6-year-old, male neutered, German Shepherd dog presented for evaluation of a dark limbal mass OS. Based on the signalment and clinical findings, a presumptive diagnosis of limbal melanocytoma was made. Additionally, OU demonstrated corneal changes consistent with chronic superficial keratitis. Full thickness en bloc resection of the limbal mass was followed with reconstruction and grafting using both frozen cornea and bulbar conjunctiva. Nitrous oxide cryotherapy was utilized as an adjunctive modality for residual neoplastic cell destruction. Histopathologic evaluation confirmed the presumptive diagnosis. At 18 months postoperatively, there was no evidence of recurrence of the limbal melanocytoma. The dog was treated long-term with both topical steroid and tacrolimus 0.03% for control of the chronic superficial keratitis.     

SONOGRAPHIC AND SCINTIGRAPHIC EVALUATION OF ACUTE RENAL ALLOGRAFT REJECTION IN CATS

The sonographic features of acute renal allograft rejection in humans and dogs are manifested by increase in renal cross-sectional area and reduction in renal cortical blood flow. These changes have not been investigated in cats. The objectives of this study were to evaluate sonographic and scintigraphic changes during acute renal allograft rejection in cats. Eight SPF, intact, adult, male cats received heterotopic renal allotransplantations. Immunosuppressive doses of cyclosporine and prednisolone were administered for 14 days and then discontinued to allow acute allograft rejection to occur. Serial measurements of renal cross-sectional area, resistive index (RI), echogenicity, and glomerular filtration rate (GFR) were performed to evaluate changes during acute rejection. Upon sonographic confirmation of absent diastolic blood flow or a 20% increase in cross-sectional area of the allograft, a nephrectomy and histopathologic evaluation were performed. Acute allograft rejection was confirmed histologically in all cats. Significant increases in renal cross-sectional area (P < 0.001) occurred postoperatively and during rejection. There were no significant changes in RI (P = 0.43) at any time. A subjective increase in medullary echogenicity and a decrease in corticomedullary demarcation were observed in the rejection period. While GFR decreased significantly in the immediate postoperative period (P < 0.001), no further change occurred during rejection (P = 0.42). Changes in RI and GFR do not appear to be sensitive indicators of acute renal allograft rejection in cats. Serial measurements of renal cross-sectional area appear to be a sensitive method for the early diagnosis of allograft rejection in feline renal transplant recipients.     

Graft union characteristics of M.26 apple rootstock combined with ‘Red Delicious’ strains — Morphological and anatomical development

This investigation records initial callus development within the graft union and the formation of vascular tissues during the first year's growth of two strains of spur types of ‘Red Delicious’ when combined with the M.26 rootstock. The differing components of stock and scion initiated a meristem at the union of tissues. This was accompanied by swirling of vascular elements continuing from a horizontal into a longitudinal orientation from the original disorganized cambium.Areas within the graft union have been designated as to callus formation, starch-grain accumulation and xylem-ray proliferation by light and scanning electron microscopy.     

椪柑高接换种的接枝方法研究

通过对中间砧的不同角度、不同接芽方位、不同粗度接枝进行高接试验。结果表明:8年生枳砧普通从江椪柑高接改换从江椪柑良种少核株系,切接高度可选择在1～1.5m,切接角度0°～70°,接枝切面近靠主干一侧,并以距主干角度0°～70°且直径大于1.5cm以上的粗壮接枝开砧为优。     

杨木塑合木制备初探Ⅲ．杨木塑合木的红外光谱分析

对选定工艺条件下的各种杨木塑合木进行了傅立叶变换红外光谱（FTIR）分析，确定改性试剂在木材组织内与细胞壁高聚物发生了接枝反应。     

核桃方块芽接愈合体形态特征调查

砧木和接穗质量是植物嫁接繁殖工作的基础,对砧木和接穗数量化指标研究工作很少。以云新核桃方块芽接愈合体为研究对象,采用大样本的调查方法,调查了砧木粗度、帮扎方式、导流孔宽度、芽片的大小和芽的形状。分析结果表明,核桃生长期方块芽接时砧木和接穗的量化指标为:①接穗芽座无,叶痕无或有隆起但不明显;②方块芽芽片宽度在16~25 mm,长度在40~50 mm之间;③绑扎方式为露芽和叶柄;④导流孔宽度2~5 mm之间;⑤砧木嫁接部位的粗度以1.3~2.0 cm最为适宜。     

榆叶梅乔化繁育技术研究

通过在乔木树种上嫁接繁殖，可使榆叶梅形成良好干形，在园林绿化工程中有更好的应用价值。试验证明，李树与榆叶梅嫁接亲合力好，可以作为乔化榆叶梅的嫁接砧木，嫁接后可以形成较好的干形，达到乔化榆叶梅的目的。