In this work, amidoxime polyacrylonitrile (AOPAN) nanofibrous membrane was prepared by a reaction between PAN nanofibers and hydroxylamine hydrochloride. The AOPAN nanofibrous membranes were used for four metal ions (Fe, Cu, Ni, Cd) chelation under different conditions. Further, the competition of different metal ions coordinating with AOPAN nanofibrous membrane was also studied. The AOPAN chel...

Deoxyribonucleic acid cyclization, Escherichia coli lac repressor binding to two spaced lac operators and repression enhancement can be successfully used for a better understanding of the conditions required for interaction between eukaryotic enhancers and the machinery of transcription initiation. Chronologically, the DNA looping model has first accounted for the properties initially defining ...

This study aims at demonstrating that wastes from anaerobic biodigester plants can be effectively valorized as functional materials to implemented in technologies enable efficient energy management and water treatment, therefore simultaneously addressing the Water-Energy-Waste Nexus challenges. Lignin, main solid residue of plant, has been into activated biochar with a mild activation agent, li...

The maximum rate of expression of the lac operon is severely reduced in lac promoter mutants. Revertants of these mutations which produce higher levels of enzyme were isolated. Some of these revertants had lost sensitivity to catabolite repression and transient repression. The mutations responsible for these losses took place at sites very close to the original promoter mutations. From these re...

China has become an important dimension of US relations with Latin America and the Caribbean (LAC). In last twenty years, increased its trade, investments, financial, political ties region, area influence for most twentieth century. As been case globally, Trump administration pressure against in LAC. The Brazilian experience shows that countries region are being pressured to make policy choices...

Abstract The expanded Panama Canal opened on June 26, 2016. This expansion is the third set of locks that enabled canal to double its capacity through addition new traffic lanes, which allowed neo-Panamax and some post-Panamax vessels transit across canal. widening has increased maritime within Latin America Caribbean (LAC). Major ports in regions have made huge investments port infrastructural...

CONTEXT Laparoscopic-assisted colectomy (LAC) has emerged as the preferred minimally invasive surgical strategy for diseases of the colon. The safety and efficacy of LAC for colon cancer are unknown, and the nature and magnitude of any quality-of-life (QOL) benefit resulting from LAC for colon cancer is also unknown. OBJECTIVE To compare short-term QOL outcomes after LAC vs open colectomy for...

BACKGROUND Over the last decade, many advances have been made in laparoscopic techniques in various surgical specialties. The technique of laparoscopic-assisted colectomy (LAC) has been reported since 1992 and has been slowly gaining popularity in the surgical community. Several studies have compared laparoscopic versus open colectomy, assessing its applicability to patients with colon cancer, ...