调节剂浸种对马铃薯不同芽位母薯生理代谢及根系形态的调控效应

[目的]通过比较不同芽位马铃薯母薯生理代谢及根系形态的变化,分析了植物生长调节剂对马铃著生长的调控效应.[方法]采用盆栽试验,浸种使用不同植物生长调节剂,研究母薯生理代谢及根系理化性状变化,探讨植物生长调节剂对马铃薯生育进程的影响.[结果]DTA-6可以提高顶部芽位母薯播后21 d内还原糖含量,对播后42～56 d根系长度、根系体积及根系干重均有提高的调控效应;DTA-6可以提高基部芽位母薯播后7～28 d内可溶性糖含量,但减少播后42～49 d根系干物质积累.SODM对顶部芽位母薯的调控效应与DTA-6基本相同,但是它对可溶性糖含量提高的效果好于DTA-6.就基部芽位母薯而言,SODM可以提高播后7～28 d内可溶性糖含量,降低播后42～49 d内根系干物质的积累,但调控效应较弱.[结论]植物生长调节剂能够通过调控马铃署母薯生理代谢及根系形态的变化进而影响马铃薯生长发育进程.     

苗期夜间低温处理对番茄叶片蔗糖代谢的影响

[目的]探讨夜间低温处理对番茄叶片蔗糖代谢的影响.[方法]以夜温15℃为对照,设夜温6℃(18:00～6:00)为处理,处理7d后测定番茄叶片糖和淀粉含量及蔗糖代谢相关酶活性:[结果]夜间低温处理增加了叶片中的果糖、葡萄糖、蔗糖、总糖和淀粉的含量,果糖和葡萄糖含量与对照相比差异不显著,蔗糖、总糖和淀粉含量与对照相比差异达极显著水平;夜间低温处理增加了叶片中酸性转化酶(AI)和中性转化酶(NI)活性,降低了蔗糖合成酶(SS)和蔗糖磷酸合成酶(SPS)活性.[结论]夜间低温导致番茄叶片中光合产物积累,对光合作用产生反馈抑制.     

翠碧1号烟叶总糖、还原糖和淀粉含量的区域分布特征

[目的]研究翠碧1号烟叶糖类物质在不同生态区域的分布特征,为卷烟配方提供参考依据.[方法]对13个乡镇翠碧1号烟叶样品的总糖、还原糖和淀粉含量进行聚类分析,并且进行类问方差分析.[结果]上部烟叶中永定湖雷和上杭庐丰样品的淀粉含量在0.05水平显著高于其他地点样品,武夷柘洋、浦城临江和浦城永兴聚为一类,其样品的总糖、还原糖和淀粉含量显著低于其他地点样品;中部烟叶中永定湖雷和上杭庐丰的总糖含量显著低于其他地点样品,淀粉含量显著高于其他地点样品;下部烟叶中永定湖雷样品的还原糖含量显著低于其他地点样品,淀粉含量显著高于其他地点样品,武夷柘洋和浦城忠信烟叶样品的还原糖含量显著高于其他地点样品.[结论]翠碧1号烟叶总糖、还原糖和淀粉含量在13个乡镇间既有相似性,又有差异性.在卷烟配方中,可以根据需要按产地归类使用.     

植物生长调节剂对中稻新两优6号光合速率的影响

[目的]研究植物生长调节剂对水稻光含速率的影响,为提高稻株剑叶光合速率,延缓叶片衰老提供科学依据.[方法]在水稻孕穗期和抽穗期叶面喷施不同植物生长调节剂,分别于始穗期及始穗期后6、12 d测定水稻剑叶净光合速率、叶面积指数(LAI)和叶绿素含量(SPAD).[结果]不同的植物生长调节剂对水稻剑叶光合速率的影响是不同的.孕穗期和始穗期喷施50 mg/L NAA-Na、20 mg/L吲哚乙酸、30 mg/L赤霉素、10 ms/L6-BA和2.1 mL/L美洲星,可以提高供试水稻的剑叶光合速率,有效延缓后期衰老;而喷施20%三唑酮或3 g/L磷酸二氢钾+17 g/L尿素降低供试水稻剑叶的光合速率.[结论]喷施合适的植物生长调节剂(如NAA-Na、吲哚乙酸、赤霉素和6-BA)可提高稻株剑叶光合速率,延缓叶片衰老,利于水稻的高产、稳产.     

不同甜荞资源的营养保健成分研究

[目的]明确部分甜荞资源的营养保健成分含量,筛选出优质的甜养资源.[方法]以产量较高的丰甜1号、平甜2号、纯甜1号、纯甜3号、纯甜4号、威甜1号、威甜2号和纯甜1408号为试验材料,测定了荞麦籽粒中总糖、还原糖、总淀粉、直链淀粉、支链淀粉、黄酮等含量,同时测定了籽粒的膨胀力和持水力.[结果]部分甜荞品种中可溶性蛋白、可溶性总糖、还原糖、总淀粉、支链淀粉、直链淀粉含量及持水力、膨胀力差异显著,而所有品种间黄酮含量的差异不显著.[结论]甜荞籽粒中淀粉含量较高,以支链淀粉为主.     

滴施不同比例的K2SO4/KCl对马铃薯生长的影响

[目的]为马铃薯生产中高效合理利用钾肥提供理论依据.[方法]在盆栽试验条件下,通过滴灌施肥系统滴施钾肥,探讨不同比例的K2SO4/KCl对马铃薯生长、产量和品质的影响.[结果] 在试验条件下,滴施K2SO4和滴施K2SO4/KCl比例为1∶1处理有利于马铃薯植株生物量的积累;滴施KCl处理和滴施K2SO4/KCl比例为1∶1处理马铃薯块茎产量显著高于其他3个处理马铃薯块茎产量,比滴施K2SO4处理增产10.1%～13.6%;滴施KCl有利于马铃薯块茎对钾的累积,而滴施K2SO4更有利于提高马铃薯的淀粉含量.[结论]在马铃薯生产中,滴施KCl或在滴施KCl时配施一定比例的K2SO4有较好的增产作用.     

苦荞营养保健成分研究

[目的] 明确不同苦荞材料的营养保健成分含量,筛选出优质苦荞材料.[方法] 以T32、T31、T30、T14、T28、T23、T24、九江苦荞、威苦2号和威苦1号 10种苦荞材料为试材,测定了其营养成分(总糖、还原糖、淀粉、直链淀粉、支链淀粉和蛋白质)含量、黄酮含量及理化特性(膨胀力和持水力).[结果] 可溶性蛋白质、可溶性总糖、还原糖、直链淀粉含量和膨胀力在某些品种之间存在显著差异,而所有品种在总淀粉、支链淀粉、黄酮含量和持水力方面均差异不显著.[结论] 苦荞籽粒中淀粉含量较高,以支链淀粉为主.     

气调对甜玉米贮藏品质的影响

[目的]研究气调包装技术对甜玉米贮藏保鲜的效果.[方法]甜玉米鲜果穗经PA/PE袋充以不同比例的气体后包装,在5 ℃条件下冷藏.[结果]在O2浓度为5%、CO2浓度为10%的气调条件下,甜玉米呼吸强度降低64.47%,可溶性糖的散失减少17.15%,还原糖的保持率增加19.32%,淀粉的积累量降低63.19%,感官品质明显优于对照.[结论]气调可使鲜食甜玉米保质期延长至15 d以上.     

壳聚糖对长豆角品质和产量的影响

[目的]为生产长豆角无公害寻找有效的生长调节剂.[方法]在长豆角现蕾前,采用1.2和1.6 mg/ml壳聚糖溶液喷洒长豆角植株,研究其豆荚品质和产量的变化.[结果]壳聚糖有效减少了长豆角虫害的发生,提高了长豆角豆荚可溶性蛋白含量、可溶性糖含量和维生素C含量,降低粗纤维含量,并增加了单果重量、单株结荚数和单位面积产量.[结论]壳聚糖作为一种植物生长调节荆,显著增加作物产量和改善作物营养品质.     

钾对烤烟碳代谢及其品质形成的影响

[目的]研究不同施钾量对烤烟碳代谢和其品质形成的影响.[方法]通过固定氮、磷水平(N 90 kg/hm<'2>,P<,2>O<,5>180 kg/hm<'2>),设置不同钾肥(K<,2>O)施用量(0、90、180、270和360 kg/hm<'2>)对烤烟碳代谢及其品质形成的影响.[结果]施用适量钾肥提高烤烟中后期烟叶蔗糖转化酶和淀粉酶活性,促进烟叶由氮代谢向碳代谢的适时转换.在烤烟移栽后30和45 d,烟叶可溶性总糖、还原糖和淀粉含量随施钾量的增加而降低,而在烤烟移栽后60、75和90 d随施钾量的增加而增加.说明施用钾肥有利于降低烤烟生长前期的碳积累,而促进烤烟生长后期碳的积累代谢.[结论]适宜的施钾量为270 kg K<,2>O/hm<'2>,在此条件下,烤烟产量最高和烤烟化学成分更趋于协调.     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.