helicobacter hepaticus was discovered in 1992 as a cause of liver cancer in the a/jcr mouse model. in susceptible mice, infection by h. hepaticus causes chronic gastrointestinal inflammation leading to neoplasia. it can also cause morphological changes in breast-glands leading to neoplasm and adenocarcinoma in mouse models. studies performed on humans have revealed that h. hepaticus may also be...

Gas-assisted pumps are the most common circulation pumps in remote areas that do not have an electrical power supply. They are basically pneumatic gas driven pumps, specially designed to take advantage of the energy of high-pressure natural gas entrained in the rich (wet) TEG leaving the gas contactor. Additional high-pressure wet production gas is necessary for mechanical advantage, and theref...

This standard specifies requirements and gives recommendations for sealing systems for centrifugal and rotary pumps used in the petroleum, natural gas, and chemical industries. See A.1.1 and A.1.2. It is the responsibility of the purchaser or seal vendor to ensure that the selected seal and auxiliaries are suitable for the intended service condition. It is applicable mainly for hazardous, flamm...

Antibiotic resistance is a phenomenon in which antibiotic used to treat bacteria becomes useless due to resistance mechanism. Increased drug resistance and occurrence of Multiple Drug Resistance in bacteria specificity nosocomial and Urinary Tract Infection bacteria has reduced the possibilities of treating these infectious diseases. Efflux pumps are one of the major mechanism of MDR in bacteri...

This paper introduces an extended hierarchical task analysis (HTA) methodology devised to evaluate and compare user interfaces on volumetric infusion pumps. The pumps were studied along the dimensions of overall usability and propensity for generating human error. With HTA as our framework, we analyzed six pumps on a variety of common tasks using Norman's Action theory. The introduced method of...

Background: Patch pumps are a relatively new method of insulin delivery. This study explores the accuracy of patch-pumps by reporting on comparative pulse-accuracy study of two patch pumps. Methods: The accuracy of two patch pumps (Cellnovo, [Cellnovo Ltd., Swansea, UK] and OmniPod® [Ypsomed Ltd, Escrick, UK]) was evaluated micro-gravimetrically. Pulse accuracy was analysed by comparing single ...

Efflux pumps can make a significant contribution to the capacity of bacteria to resist the action of antibiotics. Certain efflux pumps also recognize antimicrobial agents that are present in their respective hosts and their ability to export toxic agents could enhance bacterial survival during infection prior to appearance of cellular or humoral host defensive systems. This review is concerned ...

To study chronic catecholamine desensitization, mini-osmotic pumps were implanted subcutaneously to deliver NE, (0.5 micrograms/kg/min) or saline over 3-4 wk in dogs instrumented with left ventricular (LV) pressure gauges and arterial and left atrial pressure catheters. An acute challenge to NE (0.4 micrograms/kg/min) in intact, conscious dogs increased LV dP/dt by 1,531 +/- 208 mmHg/s before N...