共查询到20条相似文献，搜索用时 250 毫秒
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根据总部位于威斯巴登的从事办公、座椅和合同家具生产的联盟——德国办公设施行业协会(BSO)的报告,德国办公家具生产商2009年的家具销量比上年同期下降了23%。几乎所有产品领域都受 相似文献
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张玉 《林业机械与木工设备》2006,34(12):31-34
随着现代信息技术的发展,人们的生活和工作方式都发生了很大变化,对办公家具的设计也有了新的要求,使其功能和造型等更加完善。本文从办公家具的功能、技术、造型和美观等几个方面探讨办公家具设计的变化。 相似文献
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美国：某个贸易集团表示,去年,11月份美国办公家具订购量下降了21％,达到7．6亿美元,这是自2002年3月份以来下降最大的一次。根据美国办公家具制造商协会（B1FMA）的报告,11月份销售额下降9％,达到9亿美元,也是自2003年4月以来下降最多的一个月。该贸易集团预计2009年办公家具订单和发货量将分别下降13．1％和11．6％。 相似文献
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根据总部位于威斯巴登的从事办公、座椅和合同家具生产的联盟——德国办公设施行业协会（BSO）的报告,德国办公家具生产商2009年的家具销量比上年同期下降了23%。几乎所有产品领域都受到影响。办公座椅的营业额下降了22．7％,椅子和橱柜的营业额下降了23．4％。出口市场的营业额下降了29．1％,而国内市场的营业额下降了20％。座椅家具的国外营业额下降了29．4％,国内营业额下降了17．9％。 相似文献
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LIU Yu YU Yaoming SHEN Jun LIU Ming.The Key Laboratory of Bio-based Material Science Technology Northeast Forestry University Harbin P.R.China. Beiyinhe Forestry Station Wuchang P.R. China 《中国林业科技(英文版)》2006,5(1):26-32
INTRODUCTIONWhen people think about air pollution, they usually thinkabout smog, acid rain, CFC's, and other forms ofoutdoor air pollution. But do you know that air pollutioncan also exist inside homes and other buildings? It can,and every year, the health of many people is affectedby chemical substances present in the air withinbuildings. In fact, the indoor air pollution is more seriousthan outdoors’ actually. In recent years, someresearches have proven that the degree of indoor airpo… 相似文献
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本文以欧洲赤松中纤板、沸石分子筛、氧化铝及三种硅烷偶联剂为研究对象,通过采用微池热萃取仪、气质联用仪研究分析：分别添加沸石分子筛、氧化铝和硅烷偶联剂的中纤板挥发性有机化合物的成分及浓度。对比未处理中纤板,分析不同处理条件下挥发性有机化合物的控制效果。实验室制作试件后参照国际标准测试中纤板在1-28 d挥发性有机化合物释放情况。实验结果表明：多孔性吸附材料沸石分子筛及氧化铝对欧洲赤松中纤板的挥发性有机化合物释放均有控制作用,其中沸石分子筛的控制效果较好;3种硅烷偶联剂影响中纤板挥发性有机物的释放,除3-氨基丙基三乙氧基硅烷（3AC9）效果不明显外,其余两种偶联剂均有一定控制效果;硅烷偶联剂改性沸石分子筛对中纤板挥发性有机化合物控制效果比沸石分子筛单独作用时效果更佳,主要表现在对酸类物质的控制上。 相似文献
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随着人们环保意识的加强,有机挥发物VOC对环境的危害受到越来越多的重视,文中概述了木材干燥中有机挥发物 VOC的来源、成分、挥发量、挥发浓度及浓度变化过程、影响挥发量和挥发浓度的因素,并介绍了测量和控制木材干燥中VOC挥发的几种方法。旨在加强对木材干燥工业中有害气体研究的重视,为木材干燥的VOC挥发研究提供新思路。 相似文献
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随着民众物质生活水平的不断提升,在装饰装潢过程中,越来越多的人已经不满足于物质生活需求,追求精神层面上的享受已经成为一种共识。介绍了办公空间室内软装基本原则,分析了办公空间室内软装个性化发展方向,从三个方面介绍了办公空间室内设计中的木制品软装搭配风格,并对其应用效果进行了深入分析。 相似文献
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办公自动化系统可以极大地提高工作效率,提升科研院所竞争力,其应用已经成为林业现代化的重要标志之一。作者针对湖北省林科院办公信息化建设滞后的现状,以统一的标准,采用Intranet规范和体系结构,利用Lotus Notes R8群件系统为软件平台,结合Domino Workflow强大的工作流引擎,设计了一套先进的C/S、B/S并行的办公自动化系统。该系统具有现代林业特色、满足湖北省林科院日常办公及科研业务的需求,旨在为全省林业行业信息化建设提供一个参考模型。 相似文献
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Federico Brilli Nicola Luchi Marco Michelozzi Luca Calamai Gabriele Cencetti Francesco Pecori Emanuele Nigrone Alberto Santini 《Forest Pathology》2020,50(4)
Ceratocystis platani causes canker stain of plane trees, and it represents a serious disease of Platanus spp. both in the United States and Europe. Current chemical or biological controls do not effectively manage C. platani, so new preventive methods need to be developed in order to limit this pathogen spreading. In this work, we have characterized the main volatile organic compounds (VOC) emitted in vitro from pure cultures of C. platani and other common pathogenic fungal species of hosts plants growing in the same ecosystems as plane trees. We found that C. platani emitted a similar blend of VOC compared with phylogenetically similar species C. populicola. In particular, C. platani was characterized by emission of isoamyl acetate and isobutyl acetate while C. populicola by ethyl acetate and isobutyl acetate, which were not released by any of the other out‐group fungal species grown on the same medium. Moreover, following a targeted approach based on the main VOC found in vitro, we have successfully validated in vivo that VOC uniquely emitted by C. platani (i.e. isobutyl acetate along with isoamyl alcohol) were released from the bark of plane trees following C. platani inoculation. Our results highlight the possibility to exploit VOC emitted specifically by C. platani as biomarkers to recognize Platanus x acerifolia plants infected by this pathogen. 相似文献
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A study was conducted to explore the mechanism that emissions of volatile organic compounds(VOC) from heated needles and twigs(200°C,within 15 min) of Pinus pumila affect fire behaviours using the technology of Thermal Desorption-Gas Chromatography-Mass Spectrometry(TD-GC-MS).The results indicated that the main components of VOC from heated needles and twigs are terpenoids.Most of these terpenoids are monoterpenes.Terpenoids account for 72.93% for the needles and 92.40% for the twigs of the total VOC,and their emission ratios are 61.200 μg·g-1 and 217.060 μg·g-1 respectively.Heated twigs can emit more terpenoids than heated needles because twigs had more volatile oils than needles.In actual fires,these large amounts of terpenoid emissions,especially the monoterpene emissions,have strong effects on fire behaviors that are not only in the initial stage but also in the fast propagation stage of fires.These flammable gases are capable of causing violent combustion and creating crown fires.In addition,if these gases accumulate in an uneven geographical area,there will be a possible for eruptive fires and/or fires flashover to occur. 相似文献
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Volatile organic compound emission from holm oak infested by gypsy moth larvae: evidence for distinct responses in damaged and undamaged leaves 总被引：3，自引：0，他引：3
Foliage of Quercus ilex L. (holm oak), a widespread Mediterranean species, constitutively emits large quantities of a complex genotype-dependent mixture of volatile organic compounds (VOCs). During a mass outbreak of gypsy moth (Lymantria dispar L.) in southern France, we examined the effects of gypsy moth feeding on VOC production from whole apices and single leaves of Q. ilex. Feeding induced the emission of new VOCs at rates up to 240 ng m(-2) s(-1) (16% of the total VOC release), which mainly consisted of sesquiterpenes, a homoterpene and a monoterpene alcohol. The new compounds were emitted after a delay of several hours following infestation and their production declined rapidly when caterpillars were removed. Undamaged leaves of infested trees emitted new VOCs, but with a different composition to those of damaged leaves and at lower rates. Neither caterpillars nor caterpillar excrement released VOCs. Emission of constitutive VOCs by undamaged leaves of infested trees temporary increased by up to 30%, whereas, in damaged leaves, they remained stable and decreased after some days when necrotic spots occurred around the feeding sites. In continuous light and at constant temperature, emissions of new VOCs showed a marked diurnal cycle, whereas those of constitutive VOCs did not. The results suggest that induced VOCs make a significant contribution to the atmospheric VOC load and may mediate trophic interactions. The observed differential local and systemic responses in composition, quantity and time courses of emissions mirror the existence of several regulation processes triggered by different signaling compounds and elicitors. 相似文献
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To date, the chemical composition and the amount and diversity of volatile organic compounds (VOCs) released by different woody plants samples have been measured and characterized through one of the most common techniques, the gas chromatography–mass spectrometry. However, this technique is very time-consuming and requires sample preparation. By contrast, the Proton-Transfer-Reaction Time-of-Flight Mass spectrometry (PTR-ToF-MS) represents an innovative tool able to provide the whole mass spectra of VOCs with short response time, high mass resolution and without sample preparation. This technique is fast, non-invasive, highly sensitive with a rapid detection system and a very low mass fragmentation of the volatile molecules. The goal of this study was to characterize the VOCs profile of different wood sample cores using a PTR-ToF-MS tool and thereafter to assess whether VOC emissions were specific for some groups of trees. VOCs released from core wood samples belonging to 14 different species were analyzed and subsequently, using an advanced multivariate class-modeling approach, the groups (softwood and hardwood) and the different tree species were discriminated. PTR-ToF-MS was able to detect VOCs from wood and to discriminate between hardwood and softwood and among different species. The great potential and the rapidity of this analysis method allow the PTR-ToF-MS to become a commercial standard tool for monitoring VOCs emitted by wood. 相似文献