共查询到20条相似文献，搜索用时 187 毫秒
1.
杂交泡桐色斑防治处理技术 总被引：1，自引：0，他引：1
由试验结果，提出了两种杂交泡桐木处理技术，一是适应脱除杂交泡桐木材表面已产生的经，褐色斑，二是适应防止杂我泡桐木材表面红，褐色斑的产生。通过对试验结果的分析表明：两种木材处理技术可有效的脱除，防止杂交泡桐木材表面产生的红，褐色斑，并具有很好的经济效益。 相似文献
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新西兰：试验表明，Accoya改性木材（来自可持续经营林区的针叶材经Accoya技术处理）具有优良的耐久性。Scion，以前的新西兰林业研究所（New Zealand Forest Research Institute）对Accoya改性木材和merbau、cedar、teal（、cypress等几种木材和CCA处理木材进行了历时5年耐久性比较试验，结果表明，Accoya改性木材的状态显著优于其他样品。Accoya改性木材样品只有2个有轻微腐朽， 相似文献
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木材软化技术的初步研究 总被引：2，自引：0，他引：2
初步研究了两种木材的化学软化技术，通过试验确定了软化剂、软化处理方法。对软化材的化学成分测定和弯曲稳定性的检测结果表明，化学软化剂的配方合理，效果明显，价格便宜，其处理方法简单易行。 相似文献
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本文以人工林落叶松木材为试材、以生物质燃气为木材热处理介质,采用特定的处理装置和一定的处理条件,对照生物质燃气和氮气两种介质,试验分析处理介质对落叶松热处理木材性能的影响。结果表明:落叶松热处理木材的密度、平衡含水率和尺寸稳定性在两种处理介质中没有显著的变化,说明生物质燃气可以作为热处理木材的介质,并且具有处理成本低、原料来源广泛的特点。 相似文献
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20种红木类木材颜色和光泽度研究 总被引：2，自引：0，他引：2
《林业工程学报》2016,(2)
为了探索红木类木材表面的视觉特性的分布特征,测量了20种红木类木材颜色L*a*b*色空间物理量、平行于木材纹理方向的光泽度(GZL)和垂直于木材纹理方向的光泽度(GZT),建立了L*a*b*三维空间坐标系,并对20种红木类木材进行聚类分析,深入剖析了20种红木类木材视觉物理量的分布特征和相关关系。结果表明,20种红木类木材的明度值普遍较低,基本属于偏暗红色和红褐色的色调范围,根据聚类分析,乌木类、条纹乌木、黑酸枝类木材归为第一大类,花梨木类、香枝木类和红酸枝类木材归为第二大类;平行于木材纹理方向的光泽度值比垂直于纹理方向的光泽度值大,红木类木材的表面光泽度比普通木材高;明度L*、色调H都与红绿色品指数a*之间呈显著的负相关,与黄蓝色品指数b*呈正相关,色饱和度C与黄蓝色品指数b*呈显著的正相关。试验结果为红木类木材制品的综合评价提供了理论基础。 相似文献
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采用目测和色差计两种方法,对柞木的耐光色牢度进行试验。结果表明,染色柞木的耐光色牢度等级要好于未染色的柞木;未染色木材在处理15 h之前色差变化较快,而15 h后变色趋于平衡;染色木材色差变化较未染色木材缓慢,约在处理40 h左右变色趋于平衡;色差目测结果与用△E*ab公式计算结果差别较大,但与用△E00公式计算结果较接近,△E00公式计算结果更符合目测结果。 相似文献
7.
李晓东 《林业机械与木工设备》2005,33(12):7-11,14
本研究以ZR-M-301型木材阻燃剂为浸渍药液,樟子松和水曲柳为木材试样,选择常压浸渍、压力浸渍、微波处理后常压浸渍、超声波加压浸渍和微波处理后超声波加压浸渍五种木材阻燃处理方法,经过试验,探索在生产阻燃木材的浸渍方法中引入微波和超声波技术的可行性,找到效果好的木材阻燃处理方法.本研究的创新点是将微波处理与超声波辐射技术应用于木材阻燃处理中,利用微波加热处理改善木材构造的渗透性能,利用超声波的空化作用强化阻燃剂浸入性能,并提出了新的技术路线. 相似文献
8.
木材易产生吸湿变形和腐朽等问题，影响其应用效果。热改性处理可有效提升木材的尺寸稳定性和耐久性，并具有无毒、环保的特点，是一种极具潜力的木材改性方法。文中综述了木材组分（纤维素、半纤维素、木质素、抽提物）在热改性过程中发生的化学变化，以及木材树种和部位、处理介质、处理温度和时间对木材热降解的影响。经不同热改性工艺处理后，木材的化学成分变化存在较大差异。探明热改性工艺、热改性材化学成分变化和性能之间的响应机制，将有助于开发或优化热改性技术，从而得到性能优异的热改性材，拓宽其应用领域。 相似文献
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橡胶、松树木材变色菌研究及对其中之长喙壳属菌的特性研究 总被引：3，自引：0，他引：3
研究了从橡胶和松树变色木上分离到的长喙壳属(Ceratocystis sensu lato)和其他木材变色菌。证明引起这两种木材变色的主要真菌是Ceratocystisspp.,Ophostomaspp.,Lasiodiplodia theobromae和Sphaeropsissp.。进而研讨了其中之长喙壳属真菌的分类学和形态学特征,传播媒介,寄主范围,以及温度对长喙壳菌引起的木材变色速度、菌落生长、子囊壳的形成和对子囊孢子成熟的影响。 相似文献
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The association between blue stain fungi andIps cembrae Heer (Coleoptera: Scolytidae) was investigated in the Japanese larch,Larix leptolepis Gordon, in the Nagoya University Forest, Aichi Prefecture, central Japan.I. cembrae had one or two generation(s) in a year in this study area. Two blue stain fungi,Ophiostoma piceae andLeptographium sp., were isolated from the body surface of both male adults in mating chambers and female adults in parent galleries, suggesting
that this beetle species was a vector of these fungi. Although no blue stain fungi were isolated from non-stained wood, both
fungi were isolated from the mating chambers, the center and the uppermost end of the galleries throughout the season. The
fact thatO. piceae was consistently isolated with high frequency from adults and from their galleries strongly suggested that this species would
be the principal blue stain fungus infecting the beetle-attacked larch trees. 相似文献
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蓝莓经济价值与产业化发展对策及建议 总被引：4，自引：1，他引：3
介绍了蓝莓的保健作用、经济价值,阐述了我国发展蓝莓的有利条件,并对加快我国蓝莓产业化生产步伐提出了科学可行的引进国外优良品种资源,加大试验示范推广力度;开展蓝莓创新研究工作;加快建立良种选育和快繁基地;加快果实保鲜和深加工技术研究等建议。 相似文献
16.
白桦木材变色生防菌的筛选研究 总被引：1，自引：0，他引：1
木材变色病原菌易引起木材变色,使木材发生降等。笔者采用从白桦原位土壤及自身组织分离纯化的方法,寻找对白桦变色病原菌具有拮抗作用的生防菌。经过改良5点对峙试验,筛选出对白桦木材变色5种病原菌具有拮抗作用的生防菌菌株共42株,其中x18及x26对5种病原菌都具有明显的拟制效果,菌落抑菌圈半径最大达2.1 cm。 相似文献
17.
Heat treatment of wood at relatively high temperatures (in the range of 150–280°C) is an effective method to improve biological
durability of wood. This study was performed to investigate the effect of heat treatment process optimisation on the resistance
against fungal attack, including basidiomycetes, molds and blue stain fungi. An industrially used two-stage heat treatment
method under relatively mild conditions (<200°C) was used to treat the boards. Heat treatment of radiata pine sapwood revealed
a clear improvement of the resistance against the brown rot fungi Coniophora puteana and Poria placenta. Increasing process temperature and/or effective process time during the first process stage, the hydro thermolysis, appeared
to affect the resistance against C. puteana attack, but the effect on the resistance against P. placenta was rather limited. Heat treated radiata pine showed a limited resistance against the white rot fungus Coriolus versicolor and process variations during the hydro thermolysis stage appeared not to affect this resistance. A clear difference between
the resistance of heat treated Scots pine sapwood and heartwood against fungal attack is observed. Scots pine heartwood showed
a higher resistance against C. puteana and P. placenta but also against the white rot fungus C. versicolor. Similar results were obtained when heat treated birch was exposed to brown and white rot fungi. Heat treatment showed an
improved resistance against C. puteana attack, especially at higher temperatures during the hydro thermolysis stage. A clear improvement of the durability was also
observed after exposure to the white rot fungus C. versicolor and especially Stereum hirsutum. Increasing the process temperature or process time during the hydro thermolysis stage appeared to have a limited effect
on the resistance against C. versicolor attack. Heat treated radiata pine and Norway spruce were still susceptible to mold growth on the wood surface, probably due
to the formation of hemicelluloses degradation products (e.g. sugars) during heat treatment. Remarkable is the absence of
blue stain fungi on heat treated wood specimen, also because the abandant blue stain fungi were observed on untreated specimen.
Molecular reasons for the resistance of heat treated wood against fungal attack are discussed in detail contributing to a
better understanding of heat treatment methods. 相似文献
18.
Sye Hee Ahn Sei Chang Oh In-Gyu Choi Ho-Yong Kim In Yang 《Journal of Wood Science》2008,54(6):495-501
As a substitute for high-cost copper azole (CuAz) and alkaline copper quaternary (ACQ) wood preservatives, alternative wood
preservatives were formulated with okara, which is an organic waste from the production of tofu, and copper chloride and/or
borax. Each preservative was used in treatment of wood blocks in a reduced-pressure method to measure its treatability. The
treated wood blocks were placed in hot water for 3 days to examine the stability of the preservatives against hot-water leaching.
The preservatives successfully penetrated into wood blocks, probably due to the use of ammonium hydroxide as a dissociating
agent. However, the stability of okara-based preservatives dropped as the concentration of acid in the solutions used for
hydrolysis of okara increased. The treatability and leachability of the preservatives were not affected by hydrolysis temperature
but were negatively affected by the addition of borax. Leached wood blocks treated with okara-based preservatives and exposed
to decay fungi Gloeophyllum trabeum and Postia placenta over 12 weeks showed good decay resistance. Okara-based wood preservatives can protect wood against fungal attack as effectively
as CuAz, and have potential for use as environmentally friendly wood preservatives. 相似文献
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食用菌原料林的营造及其利用的探讨 总被引：1，自引：0，他引：1
采取人工营造速生的木生食用菌适生树种,定向培育食用菌原料林,短期轮伐利用,使林菌生产有机地结合起来,实现以林养菌、以菌促林的良性循环,从根本上解决林菌之间的矛盾。 相似文献