低碳生活居住环境设计

回顾了人类活动对地球环境的影响,基于对当前气候变暖的认识,认为人类活动是其主要原因,气候变化导致了严重的地球环境问题,危害着人类的生存发展。介绍了低碳城市的主要含义,并综述了相关研究的主要内容与研究进展,强调低碳城市生活模式是低碳城市规划的重要组成部分,并针对我国具体情况,从低碳生活行为、低碳生活消费、碳预算生活方式3个方面指明了我国低碳城市生活模式研究的主要内容。在此基础上,分析了低碳生活居住环境设计的目的和意义,设计的基本原则和要求,以及低碳生活的措施。     

园林景观与居住环境初探

简单阐述了居住区园林景观设计的原则与当今居住区环境景观设计中存在的缺陷,对城市居住区园林景观规划设计具有自然生态景观和文化内涵基质表达出几点思考。     

Living cells as test tubes

The combination of specific probes and advanced optical microscopy now allows quantitative probing of biochemical reactions in living cells. On selected systems, one can detect and track a particular protein with single-molecule sensitivity, nanometer spatial precision, and millisecond time resolution. Metabolites, usually difficult to detect, can be imaged and monitored in living cells with coherent anti-Stokes Raman scattering microscopy. Here, we describe the application of these techniques in studying gene expression, active transport, and lipid metabolism.     

地下之家的生态生活

城市的发展,拉高了你与地面的距离,高楼大厦源源不断地拔地而起,生活在钢筋水泥的世界里,你的生活是否也变得"僵硬"?如果房子不是建在地上,而是延伸到了地下,混合着泥土的气息,在大自然的亲密怀抱下,那这种生活应该是别有一番生动吧!     

Gas-phase polymerization: ultraslow chemistry

The mechanism of formation of polymer molecules in the gas phase is difficult to study because the involatile polymers tend to condense out of that phase. However, new techniques, involving the use of cloud chambers, have enabled workers to use the nucleation of liquid drops in supersaturated monomer vapors to detect single polymer molecules and therefore to work with so few simultaneously growing polymers that aggregation and condensation are avoided. Chain polymerization in which the chain carriers are either radicals or ions can therefore be studied in the vapor. Furthermore, the ability to work with such small concentrations of growing polymeric radicals, for example, makes it possible to avoid encounters between them that lead to recombination and the formation of "dead" polymers that are incapable of further growth. Many aspects of gas-phase polymerization can be studied including, besides radical and ion chains, ring-opening polymerization, initiation, radiation-induced polymerization, and especially "ultraslow" chemistry.     

Actin polymerization and ATP hydrolysis

F-actin is the major component of muscle thin filaments and, more generally, of the microfilaments of the dynamic, multifunctional cytoskeletal systems of nonmuscle eukaryotic cells. Polymeric F-actin is formed by reversible noncovalent self-association of monomeric G-actin. To understand the dynamics of microfilament systems in cells, the dynamics of polymerization of pure actin must be understood. The following model has emerged from recent work. During the polymerization process, adenosine 5'-triphosphate (ATP) that is bound to G-actin is hydrolyzed to adenosine 5'-diphosphate (ADP) that is bound to F-actin. The hydrolysis reaction occurs on the F-actin subsequent to the polymerization reaction in two steps: cleavage of ATP followed by the slower release of inorganic phosphate (Pi). As a result, at high rates of filament growth a transient cap of ATP-actin subunits exists at the ends of elongating filaments, and at steady state a stabilizing cap of ADP.Pi-actin subunits exists at the barbed ends of filaments. Cleavage of ATP results in a highly stable filament with bound ADP.Pi, and release of Pi destabilizes the filament. Thus these two steps of the hydrolytic reaction provide potential mechanisms for regulating the monomer-polymer transition.     

居住区内座椅设置的几点建议

座椅作为“公用家具”的代表,它是居住区景观环境的重要组成部分,它的使用功能在生活中与人的接触频率是很高的。随着人们对居住环境要求的不断提高。座椅在设计形式与类型上发生了很大的变化,但是有不少由座椅组成的空间却成为了一些“无人停留的场所”。笔者从人的行为心理与设计建设2个方面谈论,希望对当前普遍存在的问题提出一些有价值的参考。     

Living relative of the microfossil Kakabekia

A living, ammonia-obligate, umbellate form, similar to the Precambrian microfossil Kakabekia umbellata Barghoorn, has been isolated from two soil specimens collected at Harlech, Wales. This organism is amenable to culture on agar and in broth. The two soil specimens are similar in that they differ from a typical clay loam in high content of carbon, hydrogen, and organic nitrogen and low levels of sodium, potassium, and titanium. In all other constituents, such as calcium, magnesium, and iron, they are quite dissimilar. Kakabekia-like forms can be grown in glucose-anmonia media with the latter as the sole source of nitrogen, but they can also be grown on peptone and silicate in glucose-free media. Ammonia is necessary, and growth is always slow without glucose. The fission process was not observed, but the enlargement and differentiation of a preumbellate structure into its "mature" form, followed by disintegration (senescence) of this stage, was seem. An ontogeny is proposed in which the stalk and basal bulb of the complete umbellate structure are assumed to be part of the reproductive appartus.     

随岁月流淌的生活艺术——苏珊娜·莱茵施泰因

走进苏珊娜·莱茵施泰因的世界就仿佛步入一间课堂,教人如何将美国南部的舒适闲散融合进东海岸的奢华传统,再演绎出洛杉矶式的悠闲生活方式。作为家具及配饰店蜀葵(Hollyhock)的经营者,苏珊娜一直致力于振兴古老的纺织工艺和精细的手工艺,以保证作品都能拥有最为上乘的品质。同时,她也是一位室内设计师,创造舒适宜居的空间,带来平静与优雅。