The printability properties of the paper can be increased by some processes applied to surface. use non-recyclable materials derived from petroleum is decreasing day day, and demand for recyclable obtained renewable sources increasing. These include cellulose derivatives, starch types polyvinyl alcohol. ratios, sizes, physical chemical these used in content will affect strength as well change s...

This study aimed to evaluate the effect of size press coating on two types recycled papers using different nanofibrillated cellulose (NFC) and cationic starch (CS) physical mechanical properties. Wheat straw was used as a source, NFC obtained through oxidative enzymatic pretreatments. Recycled fluting coreboard were coated with starch/NFC blends at various concentrations (0.5%, 1%, 2%, 3%, 4%) ...

Abstract The purpose of this paper is to study the behavior magnetohydrodynamic (MHD) wave modes that propagate in compressible magnetic flux tubes with an elliptical cross section embedded a environment. dispersion relation describes MHD permitted tube solved numerically. Distortion spatial structure purely real eigenmodes from well-known circular model has been considered. It studied under bo...

In the context of forest modeling, it is often reasonable to assume a mukiplicative heteroscedastic error structure to the data. Under such circumstances ordinary least squares no longer provides minimum variance estimates of the model parameters. Through study of the error structure, a suitable error variance model can be specified and its parameters estimated. This error model is used to cons...

A recent analysis of Paleolithic signs have described which signs are more frequent and which are less frequent. In this paper, we show that this relative frequency can be (at least partially) explained by the symmetries of the signs: in general, the more symmetries, the more frequent the sign. 1 Different Paleolithic Signs Occur with Different Frequencies: Formulation of the Problem Interestin...

Container stacking strength is an important performance requirement of corrugated fiberboard. The objective of this study is to examine theoretically how fluting geometry affects fiberboard strength and stiffness under standard relative humidity (RH) and high RH conditions. The fluted medium in a corrugated fiberboard is modeled as a connection of curved arc and straight flank segments passing ...