In this survey, two types of natural organic and inorganic sorbents were studied for adsorption features in batch and column method. Chitin and derivatives extracted from Shrimp shell waste as organic and Firuzkooh Clinoptilolite and Na form derivatives as inorganic sorbent were applied. Both are able to adsorb and decontaminate low-level radioactive liquid waste (LLW). Total Sorption was depended on PH solution, treating time, adsorbents type and particle size of sorbents and it was independent of temperature. Chitin group sorbents were more effective on Co and their sorption depends on the deacetilation factor. The best Cs adsorption was on Na from Clinoptilolite; however, Chitin derivatives were more effective than Zeolite sorbents in removal of radionuclides such as Cs, Mn, Sr and Co. Chitosan 1 had the best and natural Firuzkooh Clinoptilolite had the worse sorption performance in comparison with other adsorbents.

Introduction: Glycoconjugates, particularly their sugar side chains, play important roles in development. This investigation was undertaken to examine the chemical nature of components in the zona pellucid possibly related to follicular development. Methods and Matherials.To this end, lectins conjugated to horseradish peroxides were used as specific histochemical probes to characterize the structure of zona pellucidaglycoconjugates and changes in their composition during ovarian cycle.Results.Three lectins for N-acetylation of galactose and glucose intensely stained the zona pellucid.Conclusion: These observations suggest that the N-acetylgalactosamine(GalNAc) and N-Acetylglucosamine(GlcNAc)-containing glycoconjugates in zona pellucid may be of functional important in follicular development. We can use this data for causing femaleinfertility and to make special cotraceptives

The effects of different levels of wood particles acetylation and resin content on the physical and mechanical properties of particleboard were investigated. Boards were made within 6 treatments at three different levels of acetyl content (WPGs of 0%, 5.11% and 10.76%) and two levels of resin content (8 and 10 %). The results indicated that by increasing the level of particles acetylation, the density of boards was reduced whereas resin content increased this property. Equilibrium moisture content, water absorption and thickness swelling of the boards were reduced by 15.3%, 26.6% and 14.9%, respectively under optimum conditions as compared with control samples at higher acetylation levels and resin contents. MOR, MOE and IB decreased by increasing acetylation level but increasing resin content from 8 to 10%, improved mechanical properties except for MOR which was not significantly affected by resin content. The result of this research have indicated that using 5.11% acetylation level and 10% resin content, it is possible to produce particleboard having enhanced physical properties with negligible loss of mechanical properties.

This research is aimed at studying the effect of acetylation on the optical behavior of the CMP pulp made of bagasse. Results show that acetylation considerably improves the brightness of the processed papers. Treatment with acetic anhydride slightly reduces the brightness of the papers bleached by hydrogen peroxide. Results of accelerated aging show that acetylation of free phenolic hydroxyl groups in lignin notably improves the stability of papers. Additionally, the reduction of pulp borohydride sodium improves brightness and other chromatic properties but does not enhance the photostability of papers, and color reversion in reduced and acetylated papers is equal to the reversion in the papers merely acetylated. The research proved in general that properties of mechanochemical pulps prepared from bagasse may be improved through acetylation and this process enhances mechanical and optical properties of the publp. Reduction treatment does not affect photoyellowing process to a considerable extent and only slightly prevents color change in bleached pulp. Reduction by borohydride sodium and subsequent acetylation has stabilizing effect as acetylation by itself has.

This research was carried out to study the influence of acetylation on paper dimensional stability. Specimens from printing paper and Texon paperboard were oven dried and then treated with acetic anhydride at 120°c for 30 and 60 min without catalyst. Acetylated papers were soaked in water for 2 and 24 h. afterwards, bulking effect of the acetylation and thicknesses swelling of the specimens as well as anti-swelling-effect (ASE) were determined in the treated specimens.Results revealed that the bulking of the specimens were increased by reaction time. However, in case of Texon, it was slowed down after 30 min of the reaction time. The thickness swelling of the treated specimens was significantly reduced after soaking in water for 2 and 24 h compared with untreated samples. As it was expected the acetylation increased ASE in Texon and the printing papers.