The present paper shows through conventional light microscopy, silver nitrate impregnation and Transmission Electron Microscopy, the changes in nuclear activity that occurs in the ovary cells during vitellogenesis of Apis mellifera (Linnaeus, 1758). The material impregnated by silver nitrate was detected in nurse cells, oocyte germinal vesicle and follicular cells, whose amounts are greater in ...

This study assessed the adsorption capacity of different activated carbons produced from peanut shell for S3B dye (Sunfix Red 150%) present in wastewater under contact conditions. The pre-impregnation input material by ZnCl2 (weight ratio 1:1) increased surface charge carbon to positive value; While non-impregnation and post-impregnation procedures had negative charge. optimal conditions were a...

In this study, dehydrated strawberries have been proposed as probiotic carriers. Strawberries were cut into halves, incorporated with Bacillus coagulans BC4 by two alternative methods (impregnation and alginate coating) submitted to drying (freeze - FD oven OD). Six treatments carried out, namely: OD (no probiotic), I-FD, I-OD, C-FD, C-OD (I- C- meaning impregnation coating respectively). While...

A pulp yield increase up to 2% can be achieved by impregnation with a liquor containing 2 M effective alkali (EA) concentration instead of 1 M. The yield increase is due to higher cellulose and glucomannan contents in the pulp, which can be rationalized by less yield loss by peeling, as impregnation is more effective at an elevated EA level. A rapid loading of chips with alkali can be realized...