VAc/nBA/AA共聚合乳液涂膜对苹果树抗寒性的研究

研究了 VAc/n BA/AA三元共聚合乳液的合成工艺 ,并进行了性能测试 ,将该乳液涂于果树表面 ,用电导法等测定乳液对果树的保水、御寒功能。结果表明 ,该乳液对果树具有明显的保水和御寒作用     

牡丹嫁接成活率试验研究

进行牡丹嫁接成活率试验,结果表明:嫁接时间早、采用贴接法、选择适应强的品种、以牡丹根作砧木进行嫁接繁殖,在一定程度上能提高嫁接成活率。     

纳米SiO2表面接枝及其在原位乳液聚合体系中的分散稳定性

用湿法改性方法将硅烷偶联剂接枝在纳米SiO2表面上,并分析了pH值、反应时间、反应温度及硅烷偶联剂的加入量对接枝效果的影响,继而讨论了接枝后的纳米SiO2在原位乳液聚合过程中的分散稳定性.结果表明,较佳的改性工艺条件为:pH值为3~4,反应温度为80℃,反应时间为120 min,硅烷偶联剂的加入量为纳米SiO2重量的10%左右.接枝了硅烷偶联剂的纳米SiO2,能够使乳化剂聚集在其表面上,形成“胶束”区域,从而提高了在乳液聚合体系中的分散性和稳定性.     

Characterization of graft-induced change in capsaicin content of Capsicum annuum L.

Summary Capsaicin contents were measured in the progenies from the test crosses between the strain, G₅S₁₇ derived from fruit with the graft-induced change in fruit shape and the original two cultivars, Yatsubusa (Capsicum annuum L. var fasciculatum Ilish) and Spanish Paprika (C. annuum L. var. grossum Sendt) used for grafting.The strain, G₅S₁₇ contained a lower amount of capsaicin than the original pungent cultivar Yatsubusa used as scion. The characteristic of the lowered capsaicin content in the strain has been stably inherited through seed propagation, and has also been transmitted to the progenies from the crosses with the original two cultivars used for scion or stock. These features in the capsaicin content agreed with those in fruit shape in the graft-induced change.     

干旱、半干旱地区异砧红松嫁接技术研究

试验分析了砧木选择、嫁接时间、嫁接方法等因子对干旱、半干旱地区异砧红松嫁接成活率和生长的影响。结果表明:樟子松、油松、赤松均可作为砧木嫁接红松。采用单芽接穗好于多芽接穗;适时早接有利于接穗木质化程度的提高;正交试验结果显示最佳处理组合为A1B1C1,即砧木为樟子松、4月中旬嫁接、芽端楔接法的组合,成活率达到90%以上。     

“早蜜橙”的来源,结构及其果实性状的研究

以“早蜜橙”这个新发现的柑桔嫁接嵌合体及与其有关品种类型的柑桔为材料，通过叶片气孔观察、花粉试验、多种酶同工酶分析和果实性状的比较分析，研究了它的来源、结构和果实主要经济性状的表现．结果发现：（１）在来源上，“早蜜橙”是由甜橙（新会甜橙的可能性最大）和南丰蜜桔形成的嫁接嵌合体．（２）在嵌合体结构上，“早蜜橙”是一个不完全周缘嵌合体，ＬＩ、ＬＩＩ以橙为主，ＬＩ则以桔为主，兼有橙因子．（３）“早蜜橙”果实品质上等，果实性状大部分来自橙，少数来自桔．糖、酸等主要营养物质的含量大都介于两亲本之间，绝大部分水解氨基酸含量比原接穗和砧木品种都高，有较大的利用价值．     

NAA水溶液浸泡接穗后封蜡对核桃苗圃枝接成活率的影响

本试验研究了3种浓度NAA水溶液浸泡接穗后在加有5%助剂A的封蜡中密封接穗顶端对核桃苗圃枝接成活的影响。结果表明:用100ppmNAA水溶液浸泡1h后封蜡,嫁接后用塑膜筒装湿壤土保护,效果最好,其接口愈合率95％,接穗萌芽率35％,成活率25％。     

竹纤维与丙烯酸接枝共聚反应的研究

用正交法探讨了以高锰酸钾为引发剂的竹纤维与丙烯酸接枝共聚改性反应。试验结果表明:当高锰酸钾浓度为7·5×10-3mol/L,丙烯酸浓度为2·67mol/L,硫酸浓度为0·2mol/L,预处理温度为60℃,预处理时间为10min,反应温度为50℃,反应时间为4h时,接枝率可达30%以上。同样的条件在微波体系中,反应时间为6min时,接枝率可达36%。利用FTIR和SEM等分析手段对竹纤维的接枝共聚产物进行了表征。     

茄子嫁接防治根腐病技术

选用 5种砧木进行茄子嫁接 ,通过对茄子嫁接亲和性测定 ,嫁接茄对茄子根腐病的防治效果调查 ,嫁接茄苗对茄子产量效益的测定及对茄子果实品质影响的分析 ,结果表明 ,茄子嫁接可有效地控制根腐病的发生与为害 ,而且 ,嫁接后的产值、产量以及茄子品质都较好。是一项切实有效地防治根腐病的技术措施     

Comparison of the pig and feline models for full thickness corneal transplantation

Purpose The goal of this study was to report on the advantages and limitations of the pig and feline models for experimental in vivo corneal transplantation. Methods Ten healthy domestic pigs and ten healthy cats were used. Full thickness penetrating keratoplasty was performed using autologous (eight cases), allogeneic (seven cases) or human xenogeneic (three cases) tissue. In two other cases, the inflammatory response to partial thickness trephination (without transplantation) was evaluated. Eyes were assessed daily before and after surgery by slit‐lamp, pachymetry, and tonometry. A transparency score ranging from 0 (opaque graft) to 4 (clear graft) was used, based on the slit‐lamp examination. Optical coherence tomography, histology, and electron microscopy were performed postmortem. Results In the pig, the mean (±SD) transparency score for the eight full thickness grafts was 0.88 ± 0.99, ranging from 0 to 3. In the feline model, the mean transparency score for the seven uncomplicated grafts was 3.93 ± 0.19, ranging from 3.5 to 4. Both negative controls without endothelium remained opaque at all time. Intraoperative tendency for iris incarceration into the wound, rapid corneal swelling, suture cheese wiring, and postoperative intraocular inflammation were the main factors jeopardizing the functional success of the corneal transplant in the pig model. Conclusion Suboptimal functional results were obtained after full thickness corneal transplantation in the pig model, while in the feline model, the same protocol yielded uneventful surgeries and clear transplants, with functional results similar to those achieved in human subjects.