Polycrystalline yttrium aluminum garnet (YAG) fibers were prepared from commercially available colloidal sols of Y,O, and AlOOH and water-soluble polymers. The fibers were dry spun and all processing was performed in air. Transformation to YAG was complete by =1300"C, and the fibers were mostly dense by 1600°C with a final fired diameter of 120 pm. A bend test was used to characterize mechanica...

Cotton fibers are single-celled outgrowths from individual epidermal cells on the outer integument of the ovules in the developing cotton fruit. Fibers of upland cotton (G. hirsutum L.) generally grow up to 30 to 40 mm in length and 15 μm in thickness at full maturity. Their development consists of four overlapping stages: fiber initiation, cell elongation, secondary wall deposition, and matur...

Myofiber growth and myofibril assembly at the myotendinous junction (MTJ) of stretch-hypertrophied rabbit skeletal muscle was studied by in situ hybridization, immunofluorescence, and electron microscopy. In situ hybridization identified higher levels of myosin heavy chain (MHC) mRNA at the MTJ of fibers stretched for 4 d. Electron microscopy at the MTJ of these lengthening fibers revealed a la...

Electron microscopic studies with Escherichia coli revealed that bicyclomycin inhibits septum formation and converts the cells to filamentous forms. The antibiotic induced high undulation and numerous blebs of the outer membrane. Sometimes cytoplasmic contents leaked into the lumen of the bleb through a disrupted region of the membrane. Breakage of the outer membrane or blebs led to cell lysis....

Antibodies to chicken gizzard myosin, subfragment 1, light chain 20, and light meromyosin were used to visualize myosin in stress fibers of cultured chicken cells. The antibody specificity was tested on purified gizzard proteins and total cell lysates using immunogold silver staining on protein blots. Immunofluorescence on cultured chicken fibroblasts and epithelial cells exhibited a similar st...

BACKGROUND AND OBJECTIVES A positive response to sacroiliac joint intra-articular infiltration with local anesthetics is used to confirm sacroiliac joint pain. However, current anatomical and histological knowledge concerning the anatomy of pain perception within the sacroiliac joint intra- and peri-articular structures is insufficient to explain the efficacy of this infiltration, because of th...

Surgical resection of the endocardium and subendocardium often abolishes chronic recurrent sustained ventricular tachycardia in patients with healed myocardial infarcts or ventricular aneurysms, presumably by interrupting the reentrant pathway. To define the morphologic characteristics of cells in the reentrant pathway, we studied the histology and ultrastructure of the endocardial resections o...

Dentigerous cyst (DC) and keratocystic odontogenic tumor (KOT) are odontogenic lesions arising from epithelial elements, such as those observed in dental follicles (DF), that have been part of the tooth forming apparatus. These lesions show different clinical and histological characteristics, as well as distinct biological behavior. This study aimed to qualify and quantify collagen and elastic ...

Abstract This research is an investigation of the preparation conditions for para-aramid aerogel fibers that are structurally colored by Rayleigh scattering, angle-independent structural color. It well known color has angle dependence colors. However, there currently a desire materials with During fibers’ spinning process, microstructures generated. The effect investigated measuring optical pro...