Investigating the effect of using oxygen delignification process on kenaf bast kraft pulp properties [PDF]
تحقیقات علوم چوب و کاغذ ایران, 2018 The first act to ameliorate bleaching process is the major elimination of lignin. Actually, the use of oxygen delignification stage before bleaching process is the essential stage in improving bleaching process and reducing process emission.
Farhad Zeinaly +3 more
doaj +1 more source
Analytic results for the scaling behaviour of a piecewise-linear map of the circle [PDF]
, 1986 For the piecewise-linear circle map theta to theta ', with theta ' identical to theta + Omega -K-(1/2- mod theta (mod 1)-1/2) the parameter values Omega i at which a periodic orbit, starting at theta =0 with winding number Fi/Fi+1, where Fi is the ith ...
Wilbrink, Jacob
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Investigation on Soda-Anthraquinone Pulping of Rapeseed Straw [PDF]
تحقیقات علوم چوب و کاغذ ایران, 2009 This research is aimed to study the possibility of rapeseed straw (Hayolla401) pulping and its paper characteristics, using Soda-AQ process. The average fiber length was found 1.04 millimeter and the average fiber diameter, lumen and thickness were found
Said mohammad Mazhari mosavi +4 more
doaj +1 more source
Creating materials with a desired refraction coefficient [PDF]
, 2009 A method is given for creating material with a desired refraction coefficient. The method consists of embedding into a material with known refraction coefficient many small particles of size $a$.
A. G. RAMM +8 more
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Comparison on the characteristics of Salix nigra Kraft and Soda pulp and paper [PDF]
تحقیقات علوم چوب و کاغذ ایران, 2014 In this study pulp and hand sheets paper characteristics of Salix nigra wood kraft and soda pulp and paper were investigated. Average density of dry and bulk density wood were determined 0.35 and 150 kg/m3 and average fiber dimension consist of fiber ...
Lila Karami motaghi +2 more
doaj +1 more source
Creating materials with a desired refraction coefficient: numerical experiments [PDF]
, 2010 A recipe for creating materials with a desired refraction coefficient is implemented numerically. The following assumptions are used: \bee \zeta_m=h(x_m)/a^\kappa,\quad d=O(a^{(2-\kappa)/3}),\quad M=O(1/a^{2-\kappa}),\quad \kappa\in(0,1), \eee where ...
Indratno, Sapto W., Ramm, Alexander G.
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Investigation on TCF Bleaching of Tobacco stalk ( Nicotiana tabacum L.'Coker 347') Soda Pulp [PDF]
تحقیقات علوم چوب و کاغذ ایران, 2014 In this study the effect of different values of peroxide in three levels 3%, 4%, 5% and sodium hydroxide in two levels 2%, 3%, on bleaching of tobacco stalks ( Nicotiana tabacum L. 'PVH 19') soda pulp was investigated.
Seyed_Pedram Hashemi +2 more
doaj +1 more source
The effects of hot water pre-extraction and alkaline catalyzed on soda-AQ pulping of kenaf whole stem [PDF]
تحقیقات علوم چوب و کاغذ ایران, 2011 In the present study the effects of hot water pre-extraction and alkaline catalyzed were evaluated on soda-aq pulping of kenaf whole stem. In this respect, following kenaf chips pre-extraction at various temperature and time conditions, pulp preparation ...
Mohammad taghi Asdolah zadeh +2 more
doaj +1 more source
Comparative Investigation on the properties of Soda and Soda-Ethanol pulps from three hardwoods [PDF]
تحقیقات علوم چوب و کاغذ ایران, 2015 Strength properties and the yield of soda and soda-ethanol pulps produced using hornbeam, beech and poplar woods were investigated. Soda pulps were produced applying 20% active alkali and the soda-ethanol pulps were made using 10% active alkali and 50 ...
Hosein Valayi, Ahmad Jahan Latibari
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Small permutation classes [PDF]
, 2011 We establish a phase transition for permutation classes (downsets of permutations under the permutation containment order): there is an algebraic number $\kappa$, approximately 2.20557, for which there are only countably many permutation classes of ...
Vatter, Vincent
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