Iron-depositing Bacteria1

Phototrophs in high-iron-concentration microbial mats: physiological ecology of phototrophs in an iron-depositing hot spring.

At Chocolate Pots Hot Springs in Yellowstone National Park the source waters have a pH near neutral, contain high concentrations of reduced iron, and lack sulfide. An iron formation that is associated with cyanobacterial mats is actively deposited. The uptake of [(14)C]bicarbonate was used to assess the impact of ferrous iron on photosynthesis in this environment. Photoautotrophy in some of the...

Thermodynamic aspects of the regulation of protein synthesis in bacteria1

Gene expression, manifested as the orderly production of specific proteins of appropriate types and amounts in defined temporal progressions, is regulated at virtually every step of messenger RNA transcription and its subsequent translation into protein. The mechanisms whereby these processes are controlled are all physical chemical in nature; i.e., their functions must be explicable in terms o...

Patterns of Sexual Recombination in Enteric Bacteria1 P

TRAIN K-12 of Escherichia coli has played a preeminent role in the study of bacterial sexuality. New knowledge of the mechanism of sexual differentiation and the development of more sensitive techniques and test strains have subsequently brought many more bacteria within the orbit of this breeding system. The immunogenetics of Salmonella poses many interesting problems ( LEDERBERG and IINO 1956...

Whether depositing fat or losing weight, fish maintain a balance.

In fish, the relative amount of tissues of different densities changes significantly over short periods throughout the year, depending on the availability of food, nutrition and their developmental status, such as sexual maturation. If a land-living animal accumulates fat it influences not only its general state of health, but also markedly increases its energy expenditure for locomotion owing ...

Method For Depositing Rare-Earth Boride Onto a Substrate