BACKGROUND Many bacteria of clinical importance survive and may grow in different environments. Antibiotic pollution may exert on them a selective pressure leading to an increase in the prevalence of resistance. OBJECTIVES In this study we sought to determine whether environmental concentrations of antibiotics and concentrations representing action limits used in environmental risk assessment...

To determine whether intrinsic cardiac neurons involved in cardiac regulation possess neurokinin (NK) receptor subtypes, we administered selective NK receptor agonists individually (100 μM; 0.1 ml) into the coronary arterial blood supply of right atrial intrinsic cardiac neurons of 18 anesthetized dogs. The selective NK1 receptor agonist [Sar9,Met(O2)11]-substance P depressed the spontaneous ac...

A Wireless Sensor Network (WSN) consists of distributed an autonomous devices that monitors both physical and environmental conditions. Sensor Networks are used for weather prediction and measuring temperature, sound, wave, vibration, pressure etc. Sensor Networks suffer from various security attacks like (i) sink hole attack, (ii) black hole attack, (iii) wormhole attack and (iv) selective for...

the performance of selective media ltb, (leauryl tryptose broth), mmgm (minerals modified glutamate medium), bgbb (brilliant green bile broth), for the detection of e.coli in water in water, were compared and the following result were obtained: the mmgm found to be unsuitable as confirmatory medium for the detection of e.coli at 44 c, due to the occurrence of an unacceptable number of the false...

The effect of cerebral and spinal cord protection by a modified perfusion technique during the elephant trunk procedure was assessed. Between 1997 and 1998, six patients underwent selective cerebral perfusion (SCP) and lower half of the body perfusion (LBP), in which the right subclavian and left femoral arteries were separately cannulated and perfused by individual pump heads. Moderate systemi...

Recently highly selective vagotomy has been suggested as both a cause of gastro-oesophageal reflux and a potential cure. This study was designed to investigate whether this operation produced any change in the resting pressure or the length of the lower oesophageal sphincter in patients undergoing highly selective vagotomy. A group of patients undergoing truncal vagotomy and drainage were also ...

Many decades of scientific investigation have proved the role of selective pressure in Homo Sapiens at least at the level of individual genes or loci. Nevertheless, there are examples of polygenic traits that are bound to be under selection, but studies devoted to apply population genetics methods to unveil such occurrence are still lacking. Stature provides a relevant example of well-studied p...

Cystic fibrosis is the most common lethal single-gene mutation in people of European descent, with a carrier frequency upwards of 2%. Based upon molecular research, resistances in the heterozygote to cholera and typhoid fever have been proposed to explain the persistence of the mutation. Using a population genetic model parameterized with historical demographic and epidemiological data, we show...

UNLABELLED For the successful single-tooth implant therapy in the esthetics zone, achieving an ideal peri-implant soft tissue profile is paramount. It can achieve by the manipulation of the provisional restorations. This clinical report demonstrate the selective pressure method and concave transmucosal profile of the provisional restorations to achieve the ideal and stable gingival profile in e...

Nonsteroidal anti-inflammatory drugs selective for inhibition of COX-2 increase heart failure and elevate blood pressure. The COX-2 gene was floxed and crossed into merCremer mice under the alpha-myosin heavy-chain promoter. Tamoxifen induced selective deletion of COX-2 in cardiomyocytes depressed cardiac output, and resulted in weight loss, diminished exercise tolerance, and enhanced susceptib...