浅析园林绿化树种的选择和配置

园林绿化树种在园林绿化中发挥着肺腑作用,可以说,离开园林树木,就谈不成园林绿化。而正确选择园林树木对园林绿化的效果起着决定性作用。本文就园林绿化树种的选择和配置作了浅析。     

对我国园林绿化历史、现状及发展趋势的探讨

园林绿化的功能广泛,作用明显,这是当代人们的共识。但园林绿化的历史沿革及发展趋势是怎样的,少有人知。本文就园林绿化的历史、现状及发展趋势作了简述。     

对园林绿化工程养护及其管理措施探讨

园林植物在园林绿化建设中所发挥的作用,会影响整个园林的形象,因此园林植物养护技术水平是影响园林绿化效果的直接因素。本文对园林绿化中园林绿化工程施工及植物养护管理进行了探讨。     

全国园林绿化数字化管理体系及平台建设研究

近年来，随着新一代信息技术的兴起和推广应用，城市园林绿化数字化建设目前在国内已普遍开展。针对部、省、市三级园林绿化管理体系的内容和特点，研究以信息技术为载体的不同层级园林绿化管理体系的构建及实现方法。通过建立全国园林绿化数字化管理平台，串联城市园林绿化建设、管理和养护等各项工作，以引导各级管理部门利用园林绿化大数据进行监督管理、辅助决策和服务公众，提升城市园林绿化科学化、动态化、精细化管理水平。     

浅析园林绿化养护管理的现状和措施

园林绿化建设的可持续发展,离不开科学合理的养护管理。然而由于多种原因,近年来园林绿化养护管理功能长期被淡化、地位被边缘化,城市绿化普遍存在着重建设轻管理的现象。本文就园林绿化养护管理的现状作了浅析,并提出了改进措施。     

南方果树在园林绿化中的应用

通过对我国南方果树的种类、特点及园林绿化应用特性进行初步调查研究,从应用种类、范围和方式等方面对其在园林绿化中的应用进行探讨。     

三角戟的栽培繁殖及其在园林绿化中的应用

三角戟原产非洲津巴布韦,其树形优美,在园林绿化中有较大应用潜力。本文简介其生物学特性、栽培与繁殖方法以及在园林绿化中的应用。     

论园林绿化树木养护措施

园林绿化养护管理在城市绿化工作中具有重要的作用,它是一种长期性、稳定性的工作,只有高质量的技术养护,才能提高园林绿化的整体水平。     

浅谈园林绿化大树移植技术

本文主要从移植前准备、移植中的注意事项、栽后管护等方面介绍大树移植技术,为大树能够很好地应用于园林绿化提供技术支持。并简单阐述了大树移植在园林绿化中的意义。     

林业技术在园林绿化中的应用

为了充分实现园林绿化,需要采取科学有效的技术手段。目前来说尽管一些城市比较重视园林绿化,但是实际所作的工作仍然存在较多问题,没有达到预期的实际效果。而在开展园林绿化阶段,通过有效引入林业技术,能够促进园林植物良好的种植。本文着重探讨园林绿化具体开展过程中,怎样合理运用林业技术,落实好园林建设的各项工作。     

Embryo and Endosperm Function and Failure inSolanumSpecies and Hybrids

Although the importance of the endosperm as a food store inmany angiosperm seeds is well known, its significance duringearly embryogenesis has been neglected. In many interspecifichybrids, and in some other situations, embryos do not developfully and abort. It has often been stated that this is causedby the endosperm failing to conduct sufficient nutrients tothe embryo, but seldom has it been suggested that the endospermactively controls most of the early stages of morphogenesisof the embryo. Information gleaned from a broad survey of theliterature, combined with additional evidence presented here,obtained fromSolanum incanumand interspecific hybrids, indicatethat the endosperm is dynamic and very active in regulatingearly embryo development. This requires highly integrated geneticcontrol of rapidly changing metabolism in the endosperm. Ininterspecific hybrids, lack of coordination may cause unbalancedproduction of growth regulating substances by the endospermand hence abortion of the embryo, or even unregulated productionof nucleases and proteases resulting firstly in autolysis ofthe endosperm and then digestion of the embryo. The endospermmay thus serve to detect inappropriate hybridization of speciesor ploidy levels and so prevent waste of resources by producingseeds that would result in sterile hybrids or unthrifty subsequentgenerations. This discriminatory function of the endosperm hasdiminished during evolution and domestication of the crop plantSolanummelongenaL.Copyright 1998 Annals of Botany Company Solanum, embryo morphogenesis, endosperm, hybrid, seed development.     

HIFs and tumors--causes and consequences

For most organisms oxygen is essential fo life. When oxygen levels drop below those required to maintain the minimum physiological oxygen requirement of an organism or tissue it is termed hypoxia. To counter act possible deleterious effects of such a state, an immediate molecular response is initiated causing adaptation responses aimed at cell survival. This response is mediated by the hypoxia-inducible factor-1 (HIF-1), which is a heterodimer consisting of an alpha- and a beta-subunit. HIF-1 alpha protein is stabilized under hypoxic conditions and therefore confers selectivity to this response. Hypoxia is characteristic of tumors, mainly because of impaired blood supply resulting from abnormal growth. Over the past few years enormous progress has been made in the attempt to understand how the activation of the physiological response to hypoxia influences neoplastic growth. In this review some aspects of HIF-1 pathway activation in tumors and the consequences for pathophysiology and treatment of neoplasia are discussed.     

Pragmatic Women and Body Politics and Maternities and Modernities: Colonial and Postcolonial Experiences in Asia and the Pacific

Pragmatic Women and Body Politics. Margaret Lock and Patricia A. Kaufert. eds. Cambridge, UK: Cambridge University Press, 1998. xii +364 pp.
Maternities and Modernities: Colonial and Postcolonial Experiences in Asia and the Pacific. Kalpana Ram and Margaret Jolly. eds. Cambridge, UK: Cambridge University Press, 1998. xiv. 305 pp.     

Morphological and constitutional features and self-esteem in children and adolescents

Studies of human constitution and mental features are traditionally among the main concepts of anthropological research. In this research, we attempted to discover connections between morphological and constitutional features and self-esteem in children and adolescents. Such a connection was discovered in some studied age groups. The obtained results could serve as a basis for further studies in this field.     

白蚁与动物及微生物的共生类型及其机制

综述了白蚁螱客的主要种类、共生关系及相关机制的研究进展。白蚁螱客中,已报道的动物种类达170种。在与动物的共生关系中存在偏利共生（宾主共栖和异种共栖）、互利共生和无关共生三种;在与微生物的共生关系中,存在与内生菌（原生动物、细菌、真菌和放线菌）和外生菌（蚁巢伞菌等）间的互利关系。指出了白蚁与螱客研究中存在的问题,给出了解决方案,并提出了今后可能的研究热点或方向,为白蚁的综合利用（如纤维素酶）及今后研究物种间的协同进化提供了基础资料。