弓斑东方仔稚鱼形态特征的观察

描述了弓斑东方仔稚鱼前期、仔鱼期和稚鱼期各发育阶段的形态特征．初孵仔鱼全长３．１２～３．３８ｍｍ．９～１０ｄ卵黄囊被吸收而消失．１５ｄ后稚鱼的器官分化完善．２４～２６ｄ稚鱼的外部形态与成体相似，全长达１０．６０～１３．５０ｍｍ．以上观察为弓斑东方的人工育苗和规模化生产提供了必要的生物学资料．     

生长调节剂对雪柳嫩枝插效果的影响

对雪柳一年生枝条用ABT1和2,4-D 2种生长调节剂的处理试验结果表明,不同的处理药剂能明显提高雪柳枝条扦插的成活率和生根率.其中用5×10-5的2,4-D处理1 h效果最好,其次是用8×10-5 ABT1处理1 h.     

Grape vine physiology: the contribution of culture in vitro

Conclusion In the area of cell and tissue physiology, the grape vine has been a major reference material. As with all woody perennials, in vitro technologies are relatively delicate. Nevertheless, remarkable progress has produced a situation where, during the past ten years, practical application of results from in vitro work has been envisaged. Reciprocal understanding has yet to be established between scientists developing micropropagation (multiplication with conformity to type) and those using in vitro methods for variety improvement (multiplication for novelty of type). I am convinced that the future should not see one of these objectives dominating the other. On the contrary, certain technologies should be developed to ensure a framework for conformity of propagation and others to obtain greater variability with the goal of plant improvement. This will render effective the two applications considered.     

Juvenilizing effect of ecdysone mimic RH 5849 inGalleria mellonella larvae

The response of the final instar larvae ofG. mellonella to topical application of the non-steroidal ecdysone mimic, RH 5849, was age-related as well as dose-dependent. In young final instar larvae, moderate doses of RH 5849 induced perfect supernumerary larval moults, but doses equal to and higher than 8.5 μg per larva caused premature formation of larval cuticle and were lethal. Application of RH 5849 significantly increased allatotropic activity of the brain, and also activated synthesis of juvenile hormone (JH) by the corpora cardiaca/corpora allata complex. Simultaneous application of RH 5849 and FMev, a potent inhibitor of JH synthesis, to young final instar larvae lowered the incidence of perfect supernumerary larval moults. We conclude that the effect of RH 5849 on the developmental programme inG. mellonella is mediated by the corpora allata.     

西施舌稚贝与仿刺参幼参混养的研究

在控制水温25℃下,设置5组壳长(4.83±0.14)mm,质量(0.041±0.004)g的西施舌稚贝,每组249粒,分别混养湿质量(0.524±0.010)g的仿刺参5,10,15,20头,设无刺参的西施舌单养组作为对照.经30d的饲养,各组西施舌成活率均较高,在89%以上.混养西施舌壳长的生长较单养有显著差异(P<0.05),混养组间西施舌壳长差异不显著(P>0.05).H15西施舌壳长增长最多为(9.03±0.21)mm,西施舌的质量生长方面,单养和混养以及混养组间都差异极显著(P<0.01).H15西施舌增重最大为(0.490±0.107)g,混养的刺参成活率为100%,至实验结束,H05和H10组刺参质量呈先增长后下降的趋势;H15则持续增长;H20一直呈现负增长.     

心理剧对未成年违法犯罪人员人际信任干预的研究

目的:探索心理剧对未成年违法犯罪人员人际信任的影响。方法:采用马氏人际信任量表测量干预前后两组学员的人际信任情况。结果:通过心理剧干预活动,进行独立样本t检验得出,实验组干预前后人际信任得分差异显著(t=8.091,P<0.001),实验组与对照组人际信任的后测值差异显著(t=-8.034,P<0.001),具有统计学意义。结论:心理剧疗法对未成年违法犯罪人员的人际信任干预是有效的,能提高未成年违法犯罪人员的人际信任度。     

公共图书馆为未成年人服务的思考与实践

概述了我国公共图书馆对未成年人服务的情况,分析了制约我国公共图书馆对未成年人服务的原因,提出了公共图书馆提升未成年人服务水平的措施。     

生命教育视域下的青少年犯罪预防

对青少年犯罪案情分析发现,青少年犯罪普遍存在一个共性即对生命的麻木、漠视与轻狂。生命教育的缺失是导致青少年犯罪的一个更深层次的、却被忽视的原因,因此要预防青少年犯罪必须对青少年进行生命教育。文章首先论述了生命教育缺失导致青少年犯罪的种种表现并对现行教育进行反思,然后对生命教育缺失导致青少年犯罪进行理论分析,最后提出了实施青少年生命教育的策略。     

棕榈半同胞子代家系苗期测定及优良家系选择

【目的】探究棕榈苗期生长遗传变异规律,筛选出苗期速生且遗传品质优良的棕榈家系,为棕榈的遗传改良提供参考。【方法】以72个棕榈半同胞家系的1.5年生幼苗为材料,观测其苗高、地径、干质量、鲜质量、条形叶和掌状叶数6个生长性状,进行遗传分析;以聚类分析法与性状表现水平分析法相结合筛选优良家系,并配合单株选择,筛选优良单株。【结果】棕榈苗期生长性状表型变异丰富且在各家系间差异极显著(P<0.001),家系遗传力变化范围为0.842~0.961,均表现为较高强度遗传;从中选出7个优良家系,中选家系的地径、干质量、掌状叶数的现实增益分别增加了18.03%、33.50%、26.77%,其遗传增益分别为16.28%、29.38%、22.51%。从7个优良家系中筛选出32株优良单株,其地径、干质量、掌状叶数的遗传增益分别增加了42.72%、97.86%、59.82%,其现实增益分别增加了60.77%、139.20%、85.09%,选择效果显著。【结论】棕榈幼苗在家系间具有很大的选育潜力,开展其早期选择研究,能为棕榈良种选育提供参考,选择出的优良家系及优良单株可为棕榈遗传改良及后续研究工作提供极佳的种质材料。