Background/purpose: The strength of aligners themselves has a high decay rate and is susceptible to accelerated degradation in the environment.The purpose of this study was to compare three types of invisible aligner films after being immersed in coffee, tea, cola, and red wine for seven days and to evaluate the changes in their strengths.Materials

The article presents results of investigation of the climate warming effects in the northern polar region of the Earth, in particular on some characteristics of ice in the northern part of the Ob Bay (the area of the most active economic activity of the Russian Federation in the last decade).It is determined that over the past 40 years, morphometri

Purpose.The purpose of the study is to develop an integrated approach for evaluating the super-efficiency of the agricultural sector in EU countries, considering resource, ecological, and economic dimensions, while identifying systemic challenges and opportunities for efficiency enhancement through slack-based Data Envelopment Analysis (DEA).Method

The Munake grape is a local variety of grape that is widely distributed in Xinjiang, China.This study aims to clarify the genetic structure of the Munake grape population, characterize genetic differentiation and gene flow among populations, gather germplasm, and establish the core germplasm collection.In total, 144 samples were collected from eigh

LED Strip Lighting Objective: The oral health of HIV positive patients may be compromised because of their depressed immunity and may increase their risk of developing some oral lesions.This study was carried out to assess the relationship of the oral hygiene status and practices with oral lesions in HIV positive patients at a dedicated HIV clinic