Taxonomically Significant Colour Changes in
... cell membrane which after determination of its structure could be useful in the chemotaxonomic classification of this economically important group. However, until its chemical structure has been elucidated, the characteristic colour changes apparently due to this carotenoid found by treating intact ...
... cell membrane which after determination of its structure could be useful in the chemotaxonomic classification of this economically important group. However, until its chemical structure has been elucidated, the characteristic colour changes apparently due to this carotenoid found by treating intact ...
Grade 6 Standard 5: Students will understand that microorganisms
... 6. Which of the following correctly describes the size of fungi compared to the size of bacteria? A. Fungi are larger B. Bacteria are larger C. They are about the same size D. They are the same size but different shapes 7. A new organism has been found with a microscope. What evidence would indicate ...
... 6. Which of the following correctly describes the size of fungi compared to the size of bacteria? A. Fungi are larger B. Bacteria are larger C. They are about the same size D. They are the same size but different shapes 7. A new organism has been found with a microscope. What evidence would indicate ...
Lab Quiz Material 3.4
... What is the consequence of overstaining / understaining? You have a coccus and rod of similar volume which is more likely to survive in a dry environment / moist environment? What is a basic dye? List some. What structure will it stain? What is an acidic dye? List some. What would the outside/inside ...
... What is the consequence of overstaining / understaining? You have a coccus and rod of similar volume which is more likely to survive in a dry environment / moist environment? What is a basic dye? List some. What structure will it stain? What is an acidic dye? List some. What would the outside/inside ...
Phylogeny of Prosthecobacter, the Fusiform Caulobacters: Members
... members of the (Y subgroup of the Proteobacteria (a-Proteobacteria),we isolated and sequenced 16s rRNA genes from four Prosthecobacter strains. Surprisingly, the results of phylogenetic analyses placed the fusiform caulobacters in a deeply rooted division of the Bacteria that was most closely affili ...
... members of the (Y subgroup of the Proteobacteria (a-Proteobacteria),we isolated and sequenced 16s rRNA genes from four Prosthecobacter strains. Surprisingly, the results of phylogenetic analyses placed the fusiform caulobacters in a deeply rooted division of the Bacteria that was most closely affili ...
Activity 5.1.4: Gram Staining Introduction
... the first steps in classifying or identifying bacteria. If the bacteria appear purple after being treated with the stain, they are classified as Gram positive. The bacteria are considered to be Gram negative if they appear pink. A Gram stain is usually one of the first steps in identifying bacteria. ...
... the first steps in classifying or identifying bacteria. If the bacteria appear purple after being treated with the stain, they are classified as Gram positive. The bacteria are considered to be Gram negative if they appear pink. A Gram stain is usually one of the first steps in identifying bacteria. ...
Bacterial Cell Wall and Differential Staining
... words underlined and appearing in blue are links that can be clicked on for more information. PowerPoints must be viewed in slide show mode to use the hyperlinks directly. • Several helpful links to fun and interactive learning tools are included throughout the PPT and on the Smart Links slide, near ...
... words underlined and appearing in blue are links that can be clicked on for more information. PowerPoints must be viewed in slide show mode to use the hyperlinks directly. • Several helpful links to fun and interactive learning tools are included throughout the PPT and on the Smart Links slide, near ...
Editable PPT - Science Prof Online
... words underlined and appearing in blue are links that can be clicked on for more information. PowerPoints must be viewed in slide show mode to use the hyperlinks directly. • Several helpful links to fun and interactive learning tools are included throughout the PPT and on the Smart Links slide, near ...
... words underlined and appearing in blue are links that can be clicked on for more information. PowerPoints must be viewed in slide show mode to use the hyperlinks directly. • Several helpful links to fun and interactive learning tools are included throughout the PPT and on the Smart Links slide, near ...
Motility Handout
... If the organism is motile, you should see some of the bacteria darting about. In some cases, only a few bacteria will be moving, while the others are still. The organism must still be considered motile. Caution: A common mistake is to confuse Brownian motion (or movement) with motility. Brownian mov ...
... If the organism is motile, you should see some of the bacteria darting about. In some cases, only a few bacteria will be moving, while the others are still. The organism must still be considered motile. Caution: A common mistake is to confuse Brownian motion (or movement) with motility. Brownian mov ...
Micro Buzzwords for Reproductive
... Micro Buzzwords for Reproductive Below are listed some common buzz words and phrases that are associated with specific microorganisms. These can often be found in clinical case scenario questions. Please fill out the specific organism next to the buzz word. Buzz word Beefy red ulcers ...
... Micro Buzzwords for Reproductive Below are listed some common buzz words and phrases that are associated with specific microorganisms. These can often be found in clinical case scenario questions. Please fill out the specific organism next to the buzz word. Buzz word Beefy red ulcers ...
the ultrastructure of prokaryotic
... until recently this method has not been applied to the study of prokaryotic-eukaryotic cell junctions. The hindgut of the wood-eating roach, Cryptocercus, and lower termites is a good place to investigate prokaryotic-eukaryotic cell junctions. This environment harbours numerous kinds of associations ...
... until recently this method has not been applied to the study of prokaryotic-eukaryotic cell junctions. The hindgut of the wood-eating roach, Cryptocercus, and lower termites is a good place to investigate prokaryotic-eukaryotic cell junctions. This environment harbours numerous kinds of associations ...
Poster
... dustbin only after sterilisation. Sterilised equipment can be reused • Flame all needles, loops and necks of test-tubes by heating them in the flame of a Bunsen burner. • Turn off the Bunsen burner when not in use or make sure that the flame is visible. • Open all containers for the shortest possibl ...
... dustbin only after sterilisation. Sterilised equipment can be reused • Flame all needles, loops and necks of test-tubes by heating them in the flame of a Bunsen burner. • Turn off the Bunsen burner when not in use or make sure that the flame is visible. • Open all containers for the shortest possibl ...
LABORATORY ASSESSMENT OF ANAEROBIC BACTERIA
... Normal anaerobic flora cause most anaerobic infections. Also, many anaerobic infections are polymicrobial, which means that cultures grow multiple species of bacteria. These 2 factors can make it hard to determine whether an anaerobic isolate is a contaminant, a contributor to infection along with o ...
... Normal anaerobic flora cause most anaerobic infections. Also, many anaerobic infections are polymicrobial, which means that cultures grow multiple species of bacteria. These 2 factors can make it hard to determine whether an anaerobic isolate is a contaminant, a contributor to infection along with o ...
Full text in pdf format
... In northeast USA waters, 29 individuals were sampled that stranded in all months except February and October. Vibrio spp. were recovered from l 1 of these; 6 of the 8 that stranded between May a n d September were positive for Vibrio spp., whereas these organisms were only cultured from 5 of the 21 ...
... In northeast USA waters, 29 individuals were sampled that stranded in all months except February and October. Vibrio spp. were recovered from l 1 of these; 6 of the 8 that stranded between May a n d September were positive for Vibrio spp., whereas these organisms were only cultured from 5 of the 21 ...
Potent and wide range of activity vs Gram +ve and Gram
... another through the enzymatic action of a penicillin-binding protein (PBP). In the presence of a β-lactam antibiotic, this process is disrupted. The β-lactam antibiotic binds the PBP and prevents it from cross-linking the glycine bridge to the peptide side chain, thus blocking incorporation of the d ...
... another through the enzymatic action of a penicillin-binding protein (PBP). In the presence of a β-lactam antibiotic, this process is disrupted. The β-lactam antibiotic binds the PBP and prevents it from cross-linking the glycine bridge to the peptide side chain, thus blocking incorporation of the d ...
Phage Based Diagnostic Systems
... • Following enrichment, the IMS beads (with target bacteria attached) are concentrated, and the growth media is removed. • Following a wash step, the reporter phage is mixed with the target bacteria (this is accomplished directly in the device) and the Phast Swab is incubated at 37oC for 1.5 hours. ...
... • Following enrichment, the IMS beads (with target bacteria attached) are concentrated, and the growth media is removed. • Following a wash step, the reporter phage is mixed with the target bacteria (this is accomplished directly in the device) and the Phast Swab is incubated at 37oC for 1.5 hours. ...
Todar`s Mechanisms of Bacterial Pathogenesis
... Bacterial Adherence to Mucosal Surfaces. In its simplest form, bacterial adherence or attachment to a eukaryotic cell or tissue surface requires the participation of two factors: a receptor and an adhesin. The receptors so far defined are usually specific carbohydrate or peptide residues on the euka ...
... Bacterial Adherence to Mucosal Surfaces. In its simplest form, bacterial adherence or attachment to a eukaryotic cell or tissue surface requires the participation of two factors: a receptor and an adhesin. The receptors so far defined are usually specific carbohydrate or peptide residues on the euka ...
Lesson Working regime of microbiological laboratory. The rules of
... (A)Some gram-positive cocci contain a teichoic acid (B) *Some gram-positive rods contain lipopolysacharides (C)Some gram-negative rods contain lipid A in their cell wall (D)Some gram-negative cocci contain phospholipids in their cell envelope 4) Choose the correct statement from following: A. all ba ...
... (A)Some gram-positive cocci contain a teichoic acid (B) *Some gram-positive rods contain lipopolysacharides (C)Some gram-negative rods contain lipid A in their cell wall (D)Some gram-negative cocci contain phospholipids in their cell envelope 4) Choose the correct statement from following: A. all ba ...
Chapter 13 Problem Set C Key: Serial Dilutions and the - Bio-Link
... first serially diluted. Then, 0.1 mL of diluted cells are spread on a Petri dish that contains nutrient agar. It is assumed that every living cell in the 0.1 mL plated on the agar divides to form a colony of bacterial cells. A colony contains so many cells that it is visible to the naked eye. It is ...
... first serially diluted. Then, 0.1 mL of diluted cells are spread on a Petri dish that contains nutrient agar. It is assumed that every living cell in the 0.1 mL plated on the agar divides to form a colony of bacterial cells. A colony contains so many cells that it is visible to the naked eye. It is ...
Lab-12-idole-urease-nitrate-reduction
... Urease Test Some bacteria are able to produce an enzyme called urease that attacks the nitrogen and carbon bond in amide compounds such as urea, forming the end products ammonia, CO2, and water. Urease test is used screen lactose negative gram-negative Enterobacteriaceae on differential media pla ...
... Urease Test Some bacteria are able to produce an enzyme called urease that attacks the nitrogen and carbon bond in amide compounds such as urea, forming the end products ammonia, CO2, and water. Urease test is used screen lactose negative gram-negative Enterobacteriaceae on differential media pla ...
Physiology
... 6. Coccus-shaped bacteria were isolated from the nasopharynx of a boy that suffered from chronic tonsillitis. In the smear they occurred in chains. What kind of bacteria are they? А. Streptococcus. В. Staphylococcus. С. Diplococcus. D. Sarcina. Е. Tetrad. 7. Various Neisseria are frequent inhabitant ...
... 6. Coccus-shaped bacteria were isolated from the nasopharynx of a boy that suffered from chronic tonsillitis. In the smear they occurred in chains. What kind of bacteria are they? А. Streptococcus. В. Staphylococcus. С. Diplococcus. D. Sarcina. Е. Tetrad. 7. Various Neisseria are frequent inhabitant ...
Problem 3
... segments; and the bioactive lipid A portion. Variation within the length of the LPS, due to mutational absence of specific structures, not only changes the phenotypic appearance of the bacterium (i.e., smooth [S], semi-rough [SR], or rough [R]), but may also change some bioactive responses by the ho ...
... segments; and the bioactive lipid A portion. Variation within the length of the LPS, due to mutational absence of specific structures, not only changes the phenotypic appearance of the bacterium (i.e., smooth [S], semi-rough [SR], or rough [R]), but may also change some bioactive responses by the ho ...
The Gram Stain Procedure
... properties as thickness, density, porosity, and integrity of the bacterial cell wall, as well as, to some extent, the chemical composition. Gram-Positive bacteria have thick, dense, relatively nonporous walls, while Gram-Negative bacteria have thin walls surrounded by lipid-rich membranes. See the B ...
... properties as thickness, density, porosity, and integrity of the bacterial cell wall, as well as, to some extent, the chemical composition. Gram-Positive bacteria have thick, dense, relatively nonporous walls, while Gram-Negative bacteria have thin walls surrounded by lipid-rich membranes. See the B ...
gramstain.pdf
... component is lipoplysaccharide. Additionally there is a phospholiped protein, lipoprotein. It’s outer appearance is convoluted. ...
... component is lipoplysaccharide. Additionally there is a phospholiped protein, lipoprotein. It’s outer appearance is convoluted. ...
Bacteria
Bacteria (/bækˈtɪəriə/; singular: bacterium) constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a number of shapes, ranging from spheres to rods and spirals. Bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacteria inhabit soil, water, acidic hot springs, radioactive waste, and the deep portions of Earth's crust. Bacteria also live in symbiotic and parasitic relationships with plants and animals. They are also known to have flourished in manned spacecraft.There are typically 40 million bacterial cells in a gram of soil and a million bacterial cells in a millilitre of fresh water. There are approximately 5×1030 bacteria on Earth, forming a biomass which exceeds that of all plants and animals. Bacteria are vital in recycling nutrients, with many of the stages in nutrient cycles dependent on these organisms, such as the fixation of nitrogen from the atmosphere and putrefaction. In the biological communities surrounding hydrothermal vents and cold seeps, bacteria provide the nutrients needed to sustain life by converting dissolved compounds, such as hydrogen sulphide and methane, to energy. On 17 March 2013, researchers reported data that suggested bacterial life forms thrive in the Mariana Trench, which with a depth of up to 11 kilometres is the deepest part of the Earth's oceans. Other researchers reported related studies that microbes thrive inside rocks up to 580 metres below the sea floor under 2.6 kilometres of ocean off the coast of the northwestern United States. According to one of the researchers, ""You can find microbes everywhere — they're extremely adaptable to conditions, and survive wherever they are.""Most bacteria have not been characterized, and only about half of the phyla of bacteria have species that can be grown in the laboratory. The study of bacteria is known as bacteriology, a branch of microbiology.There are approximately ten times as many bacterial cells in the human flora as there are human cells in the body, with the largest number of the human flora being in the gut flora, and a large number on the skin. The vast majority of the bacteria in the body are rendered harmless by the protective effects of the immune system, and some are beneficial. However, several species of bacteria are pathogenic and cause infectious diseases, including cholera, syphilis, anthrax, leprosy, and bubonic plague. The most common fatal bacterial diseases are respiratory infections, with tuberculosis alone killing about 2 million people per year, mostly in sub-Saharan Africa. In developed countries, antibiotics are used to treat bacterial infections and are also used in farming, making antibiotic resistance a growing problem. In industry, bacteria are important in sewage treatment and the breakdown of oil spills, the production of cheese and yogurt through fermentation, and the recovery of gold, palladium, copper and other metals in the mining sector, as well as in biotechnology, and the manufacture of antibiotics and other chemicals.Once regarded as plants constituting the class Schizomycetes, bacteria are now classified as prokaryotes. Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Although the term bacteria traditionally included all prokaryotes, the scientific classification changed after the discovery in the 1990s that prokaryotes consist of two very different groups of organisms that evolved from an ancient common ancestor. These evolutionary domains are called Bacteria and Archaea.