Effect montmorillonite clay as aggregate in lightweight concrete cement-free

Light weight concrete has many advantages that can be used in the construction of buildings. Perhaps one of the most important of these features is its light weight, which contributes a lot to reducing stress on the soil, which provides the possibility of rising buildings and increasing the number of floors. In addition to its role in thermal insulation and its impact on reducing the consumption of energy sources in cooling and heating, light weight concrete is considered one of the sustainability factors in buildings. One of the second major factors in sustainability is to reduce or avoid the use of cement in the manufacture of this concrete, because of the harmful effects of cement on the environment and global warming. Cement-free concrete is considered a sustainable material in terms of its depletion of the waste materials and spin-off products from different industries apposite of consumption of natural resources in the cement industry (mud, limestone). In this research first aim is to produce lightweight cement-free concrete using pozolanic material and montmorillonite clay as coarse and fine aggregate. Studying some properties of producing light weight concrete (density, compression, tensile,) with different ages (7, 28, 56) days

Effect montmorillonite clay as aggregate in lightweight concrete cement-free

Light weight concrete has many advantages that can be used in the construction of buildings. Perhaps one of the most important of these features is its light weight, which contributes a lot to reducing stress on the soil, which provides the possibility of rising buildings and increasing the number of floors. In addition to its role in thermal insulation and its impact on reducing the consumption of energy sources in cooling and heating, light weight concrete is considered one of the sustainability factors in buildings. One of the second major factors in sustainability is to reduce or avoid the use of cement in the manufacture of this concrete, because of the harmful effects of cement on the environment and global warming. Cement-free concrete is considered a sustainable material in terms of its depletion of the waste materials and spin-off products from different industries apposite of consumption of natural resources in the cement industry (mud, limestone). In this research first aim is to produce lightweight cement-free concrete using pozzolanic material and montmorillonite clay as coarse and fine aggregate. Studying some properties of producing light weight concrete (density, compression, tensile) with different ages (7, 28, 56) days

The impact of qat (Catha edulis Forsk) chewing frequency on status of chronic periodontitis

Background: Chronic periodontitis occurs due to the reaction between bacterial components of dental plaque and the humoral and cellular host immune productions, such as cytokines and inflammatory mediators. Aim: The aim of this study is to evaluate the impact of qat (Catha edulis Forsk) chewing frequency on the status of chronic periodontitis. Materials and Methods: A total of 30 patients with chronic periodontitis were selected for this study and they were divided on the basis of qat chewing habits frequency into three equal groups, i.e., non qat chewing group (control group), qat chewing once daily and qat chewing twice daily. Plaque index (PLI), gingival index (GI), and Clinical attachment loss (CAL) were recorded. Gingival biopsies were obtained from selected site for assessing histopathological changes. The data were collect and analyzed by ANOVA test. Results: There were significant differences in PLI, GI, and CAL between qat chewing patients groups compared to non qat chewing patients group (control group). Histopathological study showed increased inflammatory cells in qat chewing patients groups compared to non chewing patients group. Conclusion: There was increased severity of chronic periodontitis with increased frequency of qat chewing habit daily there is a significance differences in clinical and histopathological findings between the patients in Group II and Group III (study groups) compared to Group I (control group). Clinical Significance: The current study reveal that the severity of chronic periodontitis may be increased with increased qat chewing frequency due to its traumatic effect on periodontal tissues

IMPACT OF SPRAYING A NUTRIENT SOLUTION ON SOME EGGPLANT GENOTYPES UNDER PROTECTED CULTIVATION

This study investigated the response of several genotypes of eggplant under protected agriculture to different levels of spraying with nutrient solutions. The study involved spraying five hybrid eggplants, namely Barcelona, ​​Emerald, E35, E21, and E53 with the Brexil Dou nutrient solution at three levels of 0, 2.5, and 5 gm L-1. The treatments were distributed in a factorial experiment within a completely randomized block design (CRBD) with three replications. The Barcelona hybrid excelled in most of the growth traits and yields attaining the highest values ​​for the number of branches and leaves. It also achieved the highest number of fruits as well as yield per plant at 5.15 branches plant-1, 63.34 leaves plant-1, 20.77 fruits plant- 1, and 2.650 kg plant-1, respectively, while the E21 registered the lowest values ​​for the same traits. The 5 gm l-1 nutrient solution concentration produced the highest values ​​for the number of branches 5.71 plant branches-1, leaves 59.71 plant leaves-1, fruits per plant 19.68 plant fruits-1, and plant yield 2.432 kg compared to the control which had the lowest values