A Scientific Spectrum
ask away, but B. cereus!

formerly a microbiology blog, this will now be a science blog, in which I post science only material. enjoy! p.s. I no longer teach microbiology, so I'm all out of original content, but reblogs will be plenty!
lespritmodeste: T-bacteriophages on E.coli. Coloured Transmission Electron Micrograph (TEM) of T-bacteriophage viruses attacking a bacterial cell of Escherichia coli. Seven virus particles are seen (blue), each with a head and a tail. Four of these are “sitting” on the brown bacterial cell and small blue “tails” of genetic material (DNA) are seen being injected into the bacterium. T-bacterio- phages are parasites of bacterial cells. The virus attaches itself to the cell’s wall and, using it’s tail as a syringe, injects it’s own DNA into the bacterium. The virus DNA then takes over the bacterial cell, forcing it to produce more viruses. Magnification: x63,000 at 5x7cm size. Credit: EYE OF SCIENCE/SCIENCE PHOTO LIBRARY

lespritmodeste:

T-bacteriophages on E.coli.

Coloured Transmission Electron Micrograph (TEM) of T-bacteriophage viruses attacking a bacterial cell of Escherichia coli. Seven virus particles are seen (blue), each with a head and a tail. Four of these are “sitting” on the brown bacterial cell and small blue “tails” of genetic material (DNA) are seen being injected into the bacterium. T-bacterio- phages are parasites of bacterial cells. The virus attaches itself to the cell’s wall and, using it’s tail as a syringe, injects it’s own DNA into the bacterium. The virus DNA then takes over the bacterial cell, forcing it to produce more viruses. Magnification: x63,000 at 5x7cm size.

Credit: EYE OF SCIENCE/SCIENCE PHOTO LIBRARY

(Source: lespritmodestee)

4 months ago
213 notes
lespritmodeste: Credit: P. HAWTIN, UNIVERSITY OF SOUTHAMPTON/ SCIENCE PHOTO LIBRARY Caption: Helicobacter pylori. Coloured transmission electron micrograph (TEM) of a Helicobacter pylori bacterium (formerly known as Campylobacter pyloridis). This Gram-negative bacillus bacterium is curved (as here) or spiral in shape, with flagellae for motility. Here, many hair-like flagellae are visible. Colonies of H.pylori occur on the stomach mucous membrane in people suffering gastritis, and this bacteria has been linked to stomach ulcer formation. H.pylori may also be a co-factor for gastric cancer; its presence increases the risk of stomach tumours. Magnification: 7,700 at 6x4.5cm size.

lespritmodeste:

Credit: P. HAWTIN, UNIVERSITY OF SOUTHAMPTON/ SCIENCE PHOTO LIBRARY

Caption: Helicobacter pylori. Coloured transmission electron micrograph (TEM) of a Helicobacter pylori bacterium (formerly known as Campylobacter pyloridis). This Gram-negative bacillus bacterium is curved (as here) or spiral in shape, with flagellae for motility. Here, many hair-like flagellae are visible. Colonies of H.pylori occur on the stomach mucous membrane in people suffering gastritis, and this bacteria has been linked to stomach ulcer formation. H.pylori may also be a co-factor for gastric cancer; its presence increases the risk of stomach tumours. Magnification: 7,700 at 6x4.5cm size.

(Source: lespritmodestee)

10 months ago
7 notes
Theme: Cavalcade
realfakescientist: TEM of HIV-antigen AIDS vaccine from yeast G255/0040 Rights Managed Credit: NIBSC/SCIENCE PHOTO LIBRARY Caption: Transmission electron micrograph (TEM) of an experimental “HIV-antigen” vaccine for AIDS. The virus-like particles seen here are derived from yeast. They contain antigens specific to the HIV- virus. AIDS is an acquired disease of the immune system caused by the HIV-virus (Human Immunodefi- ciency Virus). The harmless virus-like carrier seen here is being tested for its effectiveness to combat the onset of AIDS. It has been labelled with antigens (proteins) which, it is hoped, will alert the body’s immune system to fight the HIV- virus. As late as 1992 research had yet to uncover the mechanism by which the HIV-virus causes AIDS. Magn: x200,000 at 8x10 inch, x29,000 at 35mm size. [x] 

realfakescientist:

TEM of HIV-antigen AIDS vaccine from yeast

G255/0040 Rights Managed

Credit: NIBSC/SCIENCE PHOTO LIBRARY

Caption: Transmission electron micrograph (TEM) of an experimental “HIV-antigen” vaccine for AIDS. The virus-like particles seen here are derived from yeast. They contain antigens specific to the HIV- virus. AIDS is an acquired disease of the immune system caused by the HIV-virus (Human Immunodefi- ciency Virus). The harmless virus-like carrier seen here is being tested for its effectiveness to combat the onset of AIDS. It has been labelled with antigens (proteins) which, it is hoped, will alert the body’s immune system to fight the HIV- virus. As late as 1992 research had yet to uncover the mechanism by which the HIV-virus causes AIDS. Magn: x200,000 at 8x10 inch, x29,000 at 35mm size. [x] 

8 months ago
12 notes