Abstract: The sorption of Pb (II) ions from an aqueous solution of lead nitrate on carbon sorbents, obtained from waste based on cellulose-containing materials, was studied. Particularly, among studied carbons (hazel nutshell, walnut shell, sawdust, activated carbon (fraction size - mainly 40 microns) material obtained from walnut s [...] Read more.

Abstract: Background: The continuing COVID-19 crisis of 2020 demanded a sudden and massive shift within academia from face-to-face learning to online and remote learning for both teaching and assessment.
Methods: Herein, we describe our own experience of this transition and, more specifically, of using the web-base [...] Read more.

Abstract: 65 years after the implementation of the Brown v Board of Education landmark U.S. Supreme Court case decision on May 17, 1954, we once again have in the United States a large number of public schools that are racially segregated. The primary source of such resegregation is not because of judicial rulings, but is produced p [...] Read more.

Abstract: It is now widely speculated that life originated at the “Black Smokers” of the undersea hydrothermal vents, where conditions exist for the formation of the primary ingredients and their subsequent transformation to higher biotic species such as amino acids, alcohols, etc. Any possible routes for the prebiotic oligomerizatio [...] Read more.

Abstract: The current global warming context is being experienced by world populations through the extreme whether events, sea level rise, loss of biodiversity, increase rise of temperature, re-insurgence of climate-related diseases and important slow and sudden-onset environmental catastrophes enhanced or accelerated by climate chan [...] Read more.

Abstract: The purpose of this study is to find out the emerging and enduring business during the pandemic covid19 in some countries to be set as example for starting a new business or surviving the remaining ones. This research was conducted by interviewing and having video conferences to some respondents from Europe, USA, South Amer [...] Read more.

Abstract: Since the founding of China 70 years ago, we have carried out 40 years of reform. In the past 40 years, the lives of the Chinese people have undergone tremendous changes. One fifth of the world's population has moved from being short of food and clothing to being a moderately prosperous society, The Chinese economy ranks se [...] Read more.

Abstract: A cross-sectional survey was conducted from March to June 2019 of identifying and evaluating packaging elements of food products. A sample of 1,219 customers (657 women – 562 men) participated in the study. Based on a review of existing research, a pool of 43 packaging elements for food products was developed, aiming to exa [...] Read more.

Abstract: Introduction: Granular cell astrocytoma (GCA) does not have defined radiological criteria/appearance for diagnosis. Here we present a case of GCA that was initially diagnosed as primary CNS lymphoma before pathologic diagnosis was available.
Case Description: We report a 73 year old male patient who prese [...] Read more.