نتایج جستجو برای: wood industry
تعداد نتایج: 229635 فیلتر نتایج به سال:
Wood processing is usually performed in environments with large amounts of endotoxin-rich bioaerosols that are associated with a variety of health effects. The aim of this preliminary study was to assess the relation between endotoxin levels in settled and airborne dust in wood-processing industry. Ten pairs of airborne and settled dust samples were collected in a sawmill and parquet manufactur...
The objectives of the research are to examine the energy utilization profile of the wood manufacturing industry with respect to system level production parameters and investigate the viability of specific energy efficiency measures. The Industrial Assessment Center (IAC) has conducted energy assessments in the wood manufacturing industrial sector in the State for several years. The energy utili...
A study of equipment usage in the Louisiana secondary wood products industry was conducted in 1994. The objectives of this study were to determine types of machines used by the value-added industry sector and to identify commonalties of types of machines used between industry segments. For the purpose of this analysis, if a product was produced by more than 10 companies, it was considered a sep...
Information conservation in the divergent process has always imposed importantconstraints. In the Wood industry, in which the problem is present, has no solution toconserve information all along the wood life cycle.This thesis goal is to validate the use of two new paradigms allowing improving theinformation conservation: the communicating material and the virtual manufacturing....
Near Infrared (NIR) spectroscopy has been used for timber, pulp and paper applications for over 20 years. Despite a lot of R&D work on solid wood applications for both field and in-process use, the industry has not adopted NIR as a routine technique. Solid wood has proven to be a challenging sample type to analyse in real time by NIR as the modern timber mill processes logs at a very fast rate....
In this work, the effect of temperature on charcoal structure and chemical composition is investigated for four tree species. Wood charcoal carbonized at various temperatures is analyzed by mid infrared spectroscopy coupled with multivariate analysis and by thermogravimetric analysis to characterize the chemical composition during the carbonization process. The multivariate models of charcoal w...
The recognition of wood species is needed is many areas like construction industry, furniture manufacturing, etc.,. The wood is traditionally classified by human experts. But human identification of wood type is not accurate and the manual identification is a time consuming process. So in this study, an intelligent recognition for identification of wood species was developed. This study uses im...
in this study, the effects of oleothermal modification on physical and mechanical peroperties of fir wood (abeis sp.) blocks were examined. at first, some blocks of fir wood with 5 × 20 × 120 cm dimensions were prepared. the blocks were treated in soybean oil. the effects of 3 factors such as treatments temperature (180and 200 °c), holding time (12 and 15 h) and initial moisture content of wood...
The aim of this study was to estimate occupational exposure to inhalable wood dust by country, industry, the level of exposure and type of wood dust in 25 member states of the European Union (EU-25) for the purposes of hazard control, exposure surveillance and assessment of health risks. National labour force statistics, a country questionnaire (in 15 member states, EU-15), a company survey (in...
This paper reviews associations in literature between exposure to wood dust from fresh wood and non-malignant respiratory diseases. Criteria for inclusion are epidemiological studies in English language journals with an internal or external control group describing relationships between wood dust exposure and respiratory diseases or symptoms. The papers took into account smoking, and when deali...
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