Light-membrane fractions obtained by hypoosmotic lysis of neurospora crassa mitochondria exhibit buoyant densities and marker-enzyme activities characteristic of outer mitochondrial membranes. SDS PAGE of these membrane fractions indicates that a polypeptide of M(r) 31,000 is the main protein component. Under negative-stain electron microscope examination many of the membranes in these fraction...

Figure 2 Histopathological examination showed inflammatory granulation tissue. Kinyoun stain revealed multiple acid-fast bacilli (arrows). Culture of tissue in L wenstein-Jensen media yielded Mycobacterium tuberculosis. Intestinal tuberculosis should form part of differential diagnosis of patients presenting with lower gastrointestinal bleeding. Figure 1 A 20-year-old man with a complaint of he...

neurons (two in green, one in red) stained in the same preparation by intracellular iontophoresis of Alexa fluor and imaged with confocal microscopy. Each projection neuron sends 8 –12 radial dendrites that each terminate in one of about 1,000 glomeruli. All the glomeruli sampled by each projection neuron are coplanar and the 1,000 glomeruli together fill an approximately spherical volume. Each...

We report a first case of tuberculosis of oral cavity affecting the left alveolus from Nepal in a 63-year-old male who came to otorhinolaryngology outpatient department with a complaint of an ulcer in the oral cavity and pain in bilateral ear and throat. An ulcer measuring 1.8 cm in diameter with irregular friable margin and bleeding on touch was found in the left upper alveolar region of the o...

The Balbiani Rings (BR) in the polytene chromosomes of Chironomus salivary glands are intense sites of transcription. The nascent RNPs fold during transcription into 40-50-nm granules, containing in the mature transcript approximately 37-kb RNA. Using a new nucleic acid specific stain, osmium ammine B on Lowicryl sections, in combination with electron energy filtered imaging of sections contain...

background : this study aimed to compare three staining methods including: calcofluor white, chromotrope and quick hot gram chromotrope used in diagnosis of intestinal microsporidial spores . methods : one hundred and seventy five stool specimens were collected from patients referred to laboratory of intestinal protozoology at the school of public health, tehran university of medical sciences d...