This contribution deals with the numerical simulation of dislocation dynamics by means of parametric mean curvature flow. Dislocations are described as an evolving family of closed and open smooth curves driven by the normal velocity. The equation is solved using direct approach by semi-discrete scheme based on finite difference method. Numerical stability is improved by tangential redistributi...

Simulation of the Liesegang pattern formation in low concentration gradient is presented using concentration perturbation in a deterministic model. The precipitation process is based on ion-product supersaturation theory (Ostwald's model). In the classical experiments with high initial concentration gradients, appearance time and locations of the band formation are well reproducible. Decreasing...

Precipitates of the ordered L1(2) gamma' phase (dispersed in the face-centered cubic or FCC gamma matrix) were imaged in Rene 88 DT, a commercial multicomponent Ni-based superalloy, using energy-filtered transmission electron microscopy (EFTEM). Imaging was performed using the Cr, Co, Ni, Ti and Al elemental L-absorption edges in the energy loss spectrum. Manual and automated segmentation proce...

PURPOSE To report a case of corneal ectasia secondary to pars planitis corneal endotheliopathy METHODS Clinical case description and proposed hypothesis regarding development of corneal ectasia RESULTS Eight-year-old male presented with 360° peripheral corneal endotheliopathy and edema, granulomatous keratic precipitates, and mild iritis OD. A progressive corneal ectasia then developed. Twe...

PURPOSE To report a case of bilateral primary intraocular lymphoma. CASE REPORT A 33-year-old man presented with bilateral blurred vision since two years ago. Examination revealed large keratic precipitates, anterior chamber reaction, posterior subcapsular cataracts, and vitreous infiltration. After a short trial of topical and periocular steroids, diagnostic 25-gauge pars plana vitrectomy wa...

The junctional complex in the gill epithelium of the freshwater mussel (Elliptio complanatus) consists of an intermediary junction followed by a 2-3 micro long septate junction. Homologous and heterologous cell pairs are connected by this junction. After fixation with 1% OsO(4) containing 1% potassium pyroantimonate, electron microscopy of the gill reveals deposits of electron-opaque precipitat...

a mere turbiditj7 to a distinct precipitate. The degrees of albumosuria and albuminuria were not proportional to each other in all my cases. In a few cases there was a mere trace of albumose, while the quantity of albumen was large. What is called here albumose was characterized by the following tests :? (1) Not precipitated by heat. (2) Precipitated by HNoa. This precipitate is soluble on boil...

B. megatherium phage, like staphylococcus phage, is inactivated by repeated high speed centrifugation (Northrop, 1938; Hotchin, 1954). This method of purification has the additional disadvantage that large volumes of material cannot be handled. B. megatkerium phage is precipitated from peptone solution by 0.4 saturated ammonium sulfate. The precipitate is filtered off, washed, and dissolved in ...

INTRODUCTION The purpose of this in vitro study was to determine whether para-chloroaniline (PCA) is formed through the reaction of mixing sodium hypochlorite (NaOCl) and chlorhexidine (CHX). METHODS Initially, commercially available samples of chlorhexidine acetate (CHXa) and PCA were analyzed with 1H nuclear magnetic resonance (NMR) spectroscopy. Two solutions, NaOCl and CHXa, were warmed t...