I-Iistochemical procedures for the demonstration of RNA have shown the presence of intensely basophilic bodies in the cytoplasm of spermatocytes of the crayfish, Cambarus virilis. The staining of thick sections, cut alternately with thin sections for electron microscopy, has permitted identification of the basophilic bodies with two types of lamellar systems. One of these, a set of straight ann...

Conventional corneal transplantation, in the form of penetrating keratoplasty (PK), involves full-thickness replacement of the cornea, and is a highly successful procedure. However, the cornea is anatomically a multi-layered structure. Pathology may only affect individual layers of the cornea, hence selective lamellar surgical replacement of only the diseased corneal layers whilst retaining una...

Polysynthetically-twinned titanium aluminide (PST-TiAl), a fully lamellar γ-TiAl+α2Ti3Al dual-phase alloy, is under evaluation for applications in rotary components in aircraft and automobile industries due to its high specific strength, and a high strength-retention capability at elevated-temperatures. However, the low ductility at roomto mid-high temperatures of the material hinders its appli...

Ambient-temperature fracture toughness and fatigue crack propagation behavior are investigated in a wide range of (g 1 a2) TiAl microstructures, including single-phase g, duplex, coarse lamellar (1 to 2 mm colony size (D) and 2.0 mm lamellar spacing (l)), fine lamellar (D ; 150 mm, l 5 1.3 to 2.0 mm), and a powder metallurgy (P/M) lamellar microstructure (D 5 65 mm, l 5 0.2 mm). The influences ...

Resistive-pulsecounting studies of amniotic fluid lamellar bodies are presented and demonstrate a strong concordance with the predictions of accepted measures of fetal lung maturity. Uncentrifuged as well as centrifuged specimens could be evaluated, because cells and debris are rejected electronically. The technique is not affected by bilirubin or debris of lysed whole blood, and only mildly by...

Hepato cellular carcinoma (HCC) of fibro lamellar type is an uncommon primary hepatic carcinoma. They occur most commonly in young adults. Their etiology is not clear till date, as they are not associated with chronic liver disease. Fibro lamellar HCC is not an indolent tumor, but has a better prognosis than conventional HCC. We present an interesting case of metastatic fibro lamellar HCC detec...

The synthesis of 3D lamellar graphene/BaFe12O19 composites was performed by oxidizing graphite and sequentially self-propagating combustion triggered process. The 3D lamellar graphene structures were formed due to the synergistic effect of the tremendous heat induced gasification as well as huge volume expansion. The 3D lamellar graphene/BaFe12O19 composites bearing 30 wt % graphene present the...

purpose: to determine the indications for and surgical techniques of corneal transplantation at labbafinejad medical center (lmc) from 2004 to 2007. methods: in this descriptive study, records of 756 patients who had undergone corneal transplantation from october 2004 to october 2007 were reviewed. results: overall, 504 male (64.9%) and 272 female (35.1%) subjects with mean age of 41.29±21.25 (...

Antibodies were prepared against ferredoxin isolated from spinach. These antibodies and those against TPN-ferredoxin-reductase, carboxydismutase and coupling factor were used to clarify the localization of these proteins in the thylakoid membrane. Chloroplast preparations obtained by different methods show not the same immunological reactions. Only lamellar systems suspended in the leaf homogen...