نتایج جستجو برای: paper wood
تعداد نتایج: 1763037 فیلتر نتایج به سال:
Wood extractives, commonly referred to as pitch, cause major problems in the manufacturing of pulp and paper. Treatment of nonsterile southern yellow pine chips for 14 days with Pseudomonas fluorescens, Pseudomonas sp., Xanthomonas campestris, and Serratia marcescens reduced wood extractives by as much as 40%. Control treatments receiving only water lost 11% of extractives due to the growth of ...
Bacteria play many important roles in animal digestive systems, including the provision of enzymes critical to digestion. Typically, complex communities of bacteria reside in the gut lumen in direct contact with the ingested materials they help to digest. Here, we demonstrate a previously undescribed digestive strategy in the wood-eating marine bivalve Bankia setacea, wherein digestive bacteria...
Nicholls, David; Miles, Tom. 2009. Cordwood energy systems for community heating in Alaska—an overview. Gen. Tech. Rep. PNW-GTR-783. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 17 p. Wood has become an important energy alternative in Alaska, particularly in rural areas where liquid fuel costs can be substantial. In some cases, wood fuel is r...
Extensive research efforts have been dedicated to describing degradation of wood, which is a complex process; hence, microorganisms have evolved different enzymatic and non-enzymatic strategies to utilize this plentiful plant material. This review describes a number of fungal and bacterial organisms which have developed both competitive and mutualistic strategies for the decomposition of wood a...
Microwave heating–drying of wood using a wave guide is a relatively new area of research. In order to gain insight into the phenomena that occur within the wave guide together with the temperature distribution in the wood, a detailed knowledge of absorbed power distribution is necessary. In this paper, a two dimensional numerical model is developed to predicted the distribution of electromagnet...
Utilization efficiency has been defined as the ratio of the amount of industrial roundwood (or wood pulp) consumed in a country and year to the amount that would have been consumed to produce the same output with a reference technology. The reference technology was described by the average input-output relationships in . countries of the Organization for Economic Cooperation and Development (OE...
Image-based recognition systems commonly use an extracted image from the target object using texture analysis. However, some of the proposed and implemented recognition systems of wood types up to this time have not been achieving adequatue accuracy, efficiency and feasable execution speed with respect to practicality. This paper discussed a new method of image-based recognition system for wood...
G. S. Abrams, (I J C. E. Adolphsen, (2) D. Averill, (3) J. Ballam, <4> B. C. Barish, (5 ) T. Barklow, (4 ) B. A. Barnett, (6 ) J. Bartelt, (4 ) S. Bethke, 0 J D. Blockus, (3) G. Bonvicini, <7> A. Boyarski, (4 ) B. Brabson, (JJ A. Breakstone, (8 ) F. Bulos, <4> P. R. Burchat, (2) D. L. Burke, (4 ) R. J. Cence, (8 ) J. Chapman, (7 ) M. Chmeissani, (7 ) D. Cords, <4> D. P. Coupal, <4 > P. Dauncey,...
A recent analysis of R&D productivity suggests that there are grounds for 'cautious optimism' that the industry 'turned the corner' in 2008 and is 'on the comeback trail'. We believe that this analysis is flawed and most probably wrong. We present an alternative analysis of these same data to suggest that the industry is not yet 'out of the woods' and suggest that many of the systemic issues af...
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