Thermal Insulation Material, Using Waste Cotton Production As a Placeholder

The results of investigations to determine the thermal conductivity of cotton fiber waste to be used as filler for efficient insulating materials are used in the article

INSULATING MATERIAL ON A FILLER FROM COTTON FIBER PROCESSING WASTE

Приведен краткий анализ теплоизоляционных материалов на основе минеральных волокон и растительного волокнистого сырья. Представлены результаты по определению плотности и теплопроводности отходов волокна хлопка, экспериментальных плит на основе волокон хлопка и модифицированного жидкого стекла. Установлено, что наименьший коэффициент теплопроводности, равный 0,039 Вт/(м·°С), достигается при плотности плит 58 кг/м3. Проанализированы данные исследований плотности и коэффициента теплопроводности при выдерживании образцов плит в камере при относительной влажности воздуха 97%. После 35 суток выдерживания в камере влажность образцов составила 48,1%, при этом коэффициент теплопроводности возрос в 2,1 раза, а плотность увеличилась на 48,3%.= A brief analysis of heat-insulating materials based on mineral fibers and plant fiber raw materials is given. The results of determining the density and thermal conductivity of waste cotton fiber, experimental plates based on cotton fibers and modified water glass are presented. It was found that the lowest thermal conductivity coefficient equal to 0.039 W/(m·°С) is achieved at a plate density of 58 kg/m3. The data of studies of the density and coefficient of thermal conductivity during aging of plate samples in the chamber at a relative humidity of 97% are analyzed. After 35 days in the chamber, the humidity of the samples is 48.1%, while the coefficient of thermal conductivity increases by 2.1 times, and the density increases by 48.3%

Observation of the wrapping mechanism in amine carbon dioxide molecular interactions on heterogeneous sorbents

Liquid, solvated amine based carbon capture is the core of all commercial or planned CO2 capture operations. Despite the intense research, few have looked systematically into the nature of amine molecules and their CO2 interaction. Here, we report a systematic introduction of linear ethylene amines on the walls of highly porous Davankov type network structures through simple bromination intermediates. Surprisingly, isosteric heats of CO2 adsorption show a clear linear trend with the increase in the length of the tethered amine pendant groups, leading to a concerted cooperative binding with additional H-bonding contributions from the unassociated secondary amines. CO2 uptake capacities multiply with the nitrogen content, up to an unprecedented four to eight times of the starting porous network under flue gas conditions. The reported procedure can be generalized to all porous media with the robust hydrocarbon framework in order to convert them into effective CO2 capture adsorbents. the Owner Societies 2016.We acknowledge the financial support by grants from Basic Science Research Program (2013R1A1A1012998), and IWT (NRF-2012-C1AAA001-M1A2A2026588), Korea CCS R&D Center funded by National Research Foundation of Korea (NRF) under the Ministry of Science, ICT & Future Planning of Korean government. C. T. Y. and M. A. acknowledge that this work was also made possible by NPRP grant #5-499-1-088 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors.Scopu

Saliva crystallography in patients receiving chemoradiotherapy in virtue of head and neck tumors results

Radiation therapy, chemotherapy or surgery is recommended for early treatment of head and neck cancers according to current standards. Radiation and chemoradiation therapy of head and neck tumors leads to the development of acute and chronic radiation complications in the oral cavity. Objective: to conduct a qualitative assessment of saliva by crystallography in patients receiving chemoradiation therapy for head and neck neoplasms. In the period from 2020 to 2021, 50 patients with oral mucositis of varying severity were examined, who received antitumor treatment at the Russian Scientific Center for Roentgenoradiology (RSCRR). Separation of patients: in the I group, dental support was carried out in the form of correcting the skills of individual oral hygiene. In the II group were used prolongedaction herbal preparations toothpaste based. The results were evaluated using saliva crystallography and oral hygiene. The obtained results of saliva crystallography prove the effectiveness of the use of prolongedaction herbal preparations in patients with oral mucositis of varying severity, receiving chemoradiation therapy. The advantage of morphological analysis of salivary facies is simplicity, non-invasiveness and is an inexpensive way to assess the health of the oral cavity © 2022. Journal of International Dental and Medical Research.All Rights Reserved