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Topic: Bacteria

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  Bacteria - Water Contaminates - Aquapure Filters
Bacteria are tiny organisms occurring naturally in water.
Pathogenic bacteria cause illnesses such as typhoid fever, dysentery, gastroenteritis, infectious hepatitis, and cholera.
Iron bacteria can be readily identified by the red, feathery floc that forms overnight at the bottom of a sample bottle containing iron and iron bacteria.
www.aquapurefilters.com /contaminates/108/bacteria.html   (432 words)

 Introduction to the Bacteria
However, certain bacteria, the actinomycetes, produce antibiotics such as streptomycin and nocardicin; others live symbiotically in the guts of animals (including humans) or elsewhere in their bodies, or on the roots of certain plants, converting nitrogen into a usable form.
Bacteria put the tang in yogurt and the sour in sourdough bread; bacteria help to break down dead organic matter; bacteria make up the base of the food web in many environments.
Bacteria are of such immense importance because of their extreme flexibility, capacity for rapid growth and reproduction, and great age - the oldest fossils known, nearly 3.5 billion years old, are fossils of bacteria-like organisms.
www.ucmp.berkeley.edu /bacteria/bacteria.html   (205 words)

Bacteria are the most ancient life forms Most bacteria are so small that under a light microscope you can only see them as little dots.
Bacteria were the most prominent creatures in the early stages of life's history almost 4000 million years until 600 million years ago.
A bacterial flagellum is a miniature mechanical device with a movement that is caused by rotation of the shaft, the part where the flagellum is attached to the cell.
www.microscopy-uk.org.uk /mag/wimsmall/bacdr.html   (487 words)

  Bacteria - MSN Encarta
These early bacteria inhabited a harsh world: It was extremely hot, with high levels of ultraviolet radiation from the sun and with no oxygen to breathe.
Bacteria are truly remarkable in terms of their adaptations to extreme environments and their abilities to survive and thrive in parts of Earth that are inhospitable to other forms of life.
Bacteria that inhabit the surface of the stomach, for example, must deal with extremely strong acid in the digestive juices.
encarta.msn.com /encyclopedia_761574409/Bacteria.html   (885 words)

  Bacteria - Wikipedia, the free encyclopedia
The study of bacteria is known as bacteriology, a subfield of microbiology.
Because of the difficulty in describing individual bacteria and the importance of their discovery to fields such as medicine, biochemistry, and geochemistry, the history of bacteriology is generally described as the history of microbiology.
Bacteria, often in combination with yeasts and molds, are used in the preparation of fermented foods such as cheese, pickles, soy sauce, sauerkraut, vinegar, wine, and yogurt.
en.wikipedia.org /wiki/Bacteria   (3110 words)

 bacteria. The Columbia Encyclopedia, Sixth Edition. 2001-05
Bacteria are remarkably adaptable to diverse environmental conditions: they are found in the bodies of all living organisms and on all parts of the earth—in land terrains and ocean depths, in arctic ice and glaciers, in hot springs, and even in the stratosphere.
Some bacteria are capable of specialized types of genetic recombination, which involves the transfer of nucleic acid by individual contact (conjugation), by exposure to nucleic acid remnants of dead bacteria (transformation), by exchange of plasmid genes, or by a viral agent, the bacteriophage (transduction).
The bacteria that cause disease are heterotrophic parasites.
www.bartleby.com /65/ba/bacteria.html   (969 words)

 Bacteria | Bacteria News, Research and Current Events
Dangerous multi-drug-resistant bacteria are also developing immunity to hospital disinfectants and antiseptics, according to new research presented today (Wednesday, 08 September 2004) at the Society for General Microbiology's 155th Meeting at Trinity College Dublin.
Bacteria that cause infections in the lungs of cystic fibrosis patients avoid detection by changing their appearance according to Cardiff University researchers speaking today, Thursday 13 September 2001, at the bi-annual meeting of the Society for General Microbiology at the University of East...
The presence of specific bacteria and combinations of bacteria in periodontal pockets might be an explanation for the relationship between periodontal disease and acute coronary syndrome (ACS).
www.brightsurf.com /search/r-a/Bacteria/1/Bacteria_news.html   (2415 words)

Bacteria are incredibly versatile and they can tolerate environmental extremes that kill most other froms of life: high and low temperatures, absence of oxygen, presence of all kind of toxic chemicals.
Bacteria were the first organisms to develop the capability to use solar energy to make organic compounds.
The most important group of photosynthetic bacteria are the blue-green algae that are an important component of the phytoplankton in seas and lakes.
www.hcs.ohio-state.edu /hcs300/bact.htm   (752 words)

Although countless kinds of bacteria are found throughout the sea, they occur in the greatest concentration at the surface and at the bottom, with the mid-waters having the lowest concentration.
Oceanic bacteria are extremely important insofar as they reduce dead matter to water-soluble materials which serve as basic food materials for the sea plants, which in turn form the food basis for marine animals.
The filtering bacteria in the gravel of marine aquariums are mostly of the genera Nistrosomonas and Nitrobacter.
www.rsmas.miami.edu /support/lib/seas/seasQA/QAs/b/bacteria.html   (1617 words)

 An Introduction to Bacteria
Bacteria are microscopic organisms, single-celled creatures which live mostly on the surfaces of objects where they grow as colonies.
Bacteria are very important both to the world as a whole and to mankind in particular.
Bacteria are one of the most ancient of living things and scientists believe they have been on this planet for nearly 4,000 million years.
www.earthlife.net /prokaryotes/bacteria.html   (1183 words)

 Types of Microbes: Bacteria
Bacteria can be found virtually anywhere, including on the surface of a contact lens (left) or in dental plaque (right).
Bacteria and their microbial cousins the archaea were the earliest forms of life on Earth.
Bacteria are among the earliest forms of life that appeared on Earth billions of years ago.
www.microbeworld.org /microbes/bacteria   (657 words)

Bacteria are part of a very large group of single-celled organisms.
Bacteria that are parasites live inside man, animals, and some plants causing diseases.
Bacteria is moved by air and water currents, and on any surface such as clothing, hands, or any object.
library.thinkquest.org /CR0212089/bac.htm   (349 words)

 B003 What are Bacteria?
Many bacteria which cause diseases in hydra, snakes, turtles, and other cold-blooded animals, are not able to cause disease in birds or mammals because the high body temperatures kill these bacteria or limit their growth.
Actually, it is usually bacteria in their guts that eat the wood and the animal lives on the dead bacteria and substances they produce.
Bacteria are good subjects for studying the basic laws of inheritance because they grow rapidly and and have traits which are easily studied.
www.disknet.com /indiana_biolab/b003.htm   (2655 words)

 Canadianpond.ca - Bacteria for pond cleaning, liquid & dry bacteria for water gardens
Bacterius natural bacteria out-compete and prevent the proliferation of algae, aides in the destruction of sedimentary muck and attacks the causes of foul odors from organic growth.
To mix the bacteria for your pond a large bucket is used to mix the liquid bacteria in specified proportions with pond water.
Dry bacteria come in soluble pouches and is simply tossed into the pond near the aeration diffusers or any source of moving water to help disperse the bacteria effectively throughout the water column.
www.canadianpond.com /homeb.html   (1048 words)

 Bacteria vs. Viruses - DrGreene.com
Bacteria and viruses are not peers!) All bacteria are surrounded by a cell wall.
The bacteria in the environment are essential for the breakdown of organic waste and the recycling of elements in the biosphere.
Bacteria that normally live in humans can prevent infections and produce substances we need, such as vitamin K. Bacteria in the stomachs of cows and sheep are what enable them to digest grass.
www.drgreene.com /21_527.html   (392 words)

 Wheaton College: Wheaton Quarterly: betsey's bacteria
Many bacteria were below the limits of easy detection with my microscope and, even if I had seen them, I suspect that the tiny dots and dashes-the typical forms of bacteria-would not have held my interest.
The rod-shaped lactobacillus bacteria are nearly ubiquitous in fermenting foods of all kinds; they convert sugars to lactic acid and give a pleasant acidic flavor to some beers.
Some earthly bacteria are reasonable prototypes for the sorts of organisms that we might be looking or testing for on other planets.
www.wheatonma.edu /Quarterly/q2003fall/bacteria.html   (1765 words)

 Decomposition: Bacteria
Some bacteria are autotrophic, making their own food in a similar way to plants by splitting carbon dioxide using energy from the sun, or through the oxidation of elements such as nitrogen and sulphur.
Bacteria involved in the decomposition of animal bodies are heterotrophic, breaking down complex molecules into their constituent elements through respiration or fermentation (depending on whether they are aerobic or anaerobic bacteria).
Bacteria are largely responsible for the recycling of carbon, nitrogen and sulphur into forms where they can be taken up by plants.
www.deathonline.net /decomposition/corpse_fauna/bacteria.htm   (186 words)

There are some bacteria relatives that can do photosynthesis--they don’t have chloroplasts, but their chlorophyll and other needed chemicals are built into their cell membranes.
Because gelatin is a protein, many bacteria are able to digest it and use it for food, resulting in liquification of the medium.
Because agar is a complex polysaccharide, most bacteria cannot digest it, and it remains solid at body temperature, enabling researchers to incubate bacteria, encouraging their growth.
biology.clc.uc.edu /courses/bio106/bacteria.htm   (1057 words)

 Howstuffworks "How Cells Work"
coli bacteria) is typical -- it is about one-hundredth the size of a human cell (maybe a micron long and one-tenth of a micron wide), so it is invisible without a microscope.
Bacteria are a lot simpler than human cells.
At the center of the cell is a ball of DNA (similar to a wadded-up ball of string).
science.howstuffworks.com /cell1.htm   (497 words)

Bacteria are the oldest, the simplest, and the most numerous forms of life.
Even though there are 2.5 billion bacteria in one gram of soil, you may never see a single bacteria in your entire life.
If, for some reason, bacteria could not do their job, or suddenly and inexplicably disappeared, imagine what a mess we would be in.
www.amnh.org /nationalcenter/youngnaturalistawards/1998/bacteria.html   (1094 words)

Their pink carotenoid pigments make them conspicuous when the bacteria are present in large concentrations, as they are on the shores of some salty, land-locked lakes.
They include the gliding bacteria, the spirochetes, the curved (vibrios) and spiral (spirillae) bacteria, gram-negative rods, gram-negative cocci, rickettsias, chlamydias and the photosynthetic cyanobacteria.
For many years, the evolutionary relationships of bacteria were so poorly understood that they were classified only on the basis of their shape and staining characteristics.
fig.cox.miami.edu /Faculty/Dana/monera.html   (986 words)

 Bacterial Cell Model
This layer of polysaccharide (sometimes proteins) protects the bacterial cell and is often associated with pathogenic bacteria because it serves as a barrier against phagocytosis by white blood cells.
The three primary shapes in bacteria are coccus (spherical), bacillus (rod-shaped) and spirillum (spiral).
Bacteria may have one, a few, or many flagella in different positions on the cell.
www.cellsalive.com /cells/bactcell.htm   (454 words)

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