Marine organisms modify the distribution of radioisotopes in the oceanic ecosystem. Various vital processes of plants and animals concentrate elements. The distributions of the biota are often independent of their watery environment; they may actively migrate vertically or horizontally or may remain in place while the water moves past them. In the case of plankton, the concentrating organisms p...

Polysaccharides are major components of macroalgal and phytoplankton biomass constitute a large fraction the organic matter produced degraded in ocean. Until recently, however, our knowledge marine polysaccharides was limited due to their great structural complexity, correspondingly complicated enzymatic machinery used by microbial communities degrade them, lack readily applied means isolate an...

this experiment was conducted to determine the effects of dietary myrtle essential oil on small intestinal morphology and microbiology of broiler chickens. two hundred day-old broiler chickens (ross 308) were allocated to 5 treatments, 4 replications with a completely randomized design. the diets were supplemented with: no myrtle essential oil (control), each of myrtle essential oil at levels o...

background surgical site infections (ssis) are the most common nosocomial infections in surgical patients. depending on the source of a traumatic wound, particular pathogens are expected to be present while their prevalence varies in different conditions. this study focused on determination of microorganisms in traumatic wound infection and the frequency of staphylococcus aureus and other organ...

Volume 14, Number 2 284 that live under some of the harshest conditions on the planet invigorating. Understanding how the structural and physiological adaptations of these microorganisms allow them to live under these harsh conditions provides insight into what life had to endure when our own world was a much more inhospitable place. The new text Polar Microbiology: Life in a Deep Freeze by Rob...

b ackground: health care-associated infections are an important cause of morbidity and mortality in hospitals. reports have shown that nurses’ uniforms are sources of health care-associated infection transmission. the present study assessed the rate of bacterial contamination of healthcare worker’s white coats in two tertiary hospitals in mashhad, iran. methods: 300 healthcare workers participa...

Generations of microbiologists have pondered over the issue of bacterial activity and whether most bacteria in the environment are “active,” “inactive,” or “dormant” (Stevenson 1978). This is a question with clear practical implications, in terms of food, sanitary, and clinical microbiology, as well as profound ecological implications. The issue started to be debated in earnest within the aquat...

Cambridge, MA, USA 9 2 Department of Ecology and Evolutionary Biology, University of California, Irvine, CA, USA 10 3 Microbiology Graduate Program, Massachusetts Institute of Technology, Cambridge, MA, USA 11 4 Department of Molecular and Biomedical Sciences, University of Maine, Orono, ME, USA 12 5 Department of Biological Sciences, University of Southern Maine, Portland, ME, USA 13 6 Departm...