Enteropathogenic Escherichia coli (EPEC) and enterohemorrhagic E. coli (EHEC) possess a filamentous type III secretion system (TTSS) employed to deliver effector proteins into host cells. EspA is a type III secreted protein which forms the filamentous extension to the TTSS and which interacts with host cells during early stages of attaching and effacing (A/E) lesion formation. By immunofluoresc...

We have studied the stain distribution within rat liver gap junctions for specimens prepared by thin sectioning and negative staining. Pools of stain molecules exist in two specific locations with respect to the distinctive morphological units (connexons) of the junction. One pool of stain surrounds the connexons and is restricted to the extracellular space in the gap between the adjacent plasm...

Objective: Oral squamous cell carcinoma (OSCC) is the sixth most common cancer worldwide and accounting for 90% of cancers of oral cavity. Tobacco abuse has been proved to be the major risk factor in the development of OSCC. Despite advances in surgery, radiation and chemotherapy, the five year survival rate for oral cancer has not improved significantly over the past several decades and it rem...

Figure 1. Upper left, Photograph showing skin lesions on arm and shoulder of patient. Upper right, CT scan of neck revealing multiple enlarged lymph nodes. Lower left, Detail of a skin ulcer on forehead of patient. Lower right, Histologic examination of skin biopsy specimen showing perivascular infiltrates of neutrophil granulocytes and ovoid yeasts (diameter, 15 mm) and a thick cell wall (peri...

BACKGROUND High-intensity focused ultrasound (HIFU) therapy offers great promise for the treatment of cancer. The histological changes, including the antitumor immunological response, after HIFU treatment was examined in soft tissue sarcoma. MATERIALS AND METHODS Sarcoma 180 cells were injected subcutaneously in mice. Approximately 2 weeks after the injection, the tumor was irradiated by a si...

objective the aim of this study was to compare the sensitivity and specificity of acid fast and auramine-rhodamine staining and multiplex pcr for the detection of mycobacterium tuberculosiscomplex and non tuberculosis mycobacteria on formalin fixed paraffin embedded tissues (ffpe) materials and methods forty cases of ffpe pleural and bronchial tissue with chronic granulomatous inflammation and ...

Title of Thesis: VISUALIZATION OF CERAMIDE CHANNEL BY TRANSMISSION ELECTRON MICROSCOPY Soumya Samanta, Master of Science, 2011 Thesis directed by: Professor Marco Colombini Department of Biology Functional studies have shown that the sphingolipid ceramide, self-assembles in phospholipid membranes to form large channels capable of allowing proteins to cross the membrane. Here these channels are ...

(See pages 441–2 for the Photo Quiz) Figure 2. Periodic acid Schiff stain showing ovoid yeasts (diameter, ∼10 mm) with thick cell wall, vacuolated cytoplasm, and narrow-based bud (arrow) (original magnification, ϫ420). Figure 1. Immunohistochemical stain for lysozyme (arrow) revealing a giant cell with multiple ovoid cysts in the cytoplasm (original magnification , ϫ240). Diagnosis: Vaginal Afr...

We demonstrate for the first time the successful layer transfer of an epitaxially grown monocrystalline Si film from a purely chemically etched porous Si substrate of 150 mm diameter to a glass carrier. The surface conditioning for all Si layer transfer processes based on porous Si has been, up to now without exception, carried out by electrochemical etching. In contrast, our chemical stain etc...