Coexistence of Congenital Hereditary Endothelial Dystrophy and Fuchs Endothelial Corneal Dystrophy Associated With SLC4A11 Mutations in Affected Families.

Purpose: To evaluate parents of probands affected with autosomal recessive congenital hereditary endothelial dystrophy (CHED) for clinical signs of Fuchs endothelial corneal dystrophy (FECD) and to determine the genotypes of the SLC4A11 gene in the probands and their parents.

Methods: This study involved 9 patients affected with CHED from 8 families. The parents of such probands were examined to investigate for possible signs of FECD although they did not present with any visual complaints.

Development and validation of the stability-indicating LC-UV method for the determination of Cefditoren pivoxil.

An isocratic RP-HPLC method was developed for the determination of Cefditoren pivoxil in pharmaceutical formulations using a C-18 column with water-acetonitrile (50:50, v/v) as mobile phase and flow rate 1.2 mL/min (UV detection at 218 nm). Linearity was observed in the concentration range 1.

Stability-indicating liquid chromatographic method for the determination of Letrozole in pharmaceutical formulations.

A stability-indicating high-performance liquid chromatographic method was developed and validated for the determination of Letrozole in tablet dosage forms. Reversed-phase chromatography was performed on Shimadzu Model LC-Class-Vp with Lichrocart/Lichrosphere 100 C-18 (250 mm×4.6 mm, 5 μm particle size) column with methanol: tetra butyl ammonium hydrogen sulfate (80:20V/V) as mobile phase at a flow rate of 1 mL/min with UV detection at 240 nm.

Spectrophotometric methods for the determination of letrozole in bulk and pharmaceutical dosage forms.

Ultraviolet (UV), first derivative, second derivative, and AUC-spectrophotometric methods for the determination of letrozole in pharmaceutical formulations have been developed. For UV-spectrophotometry, the standard solutions were measured at 240.0 nm.

Multilayer antireflection coatings for the visible and near-infrared regions.

With a high-refractive-index mixed-oxide dielectric material of ZrTiO(4) and ZrO(2) [Substance H2 (Sub2) from E. Merck, Darmstadt, Germany], in combination with magnesium flouride (MgF(2)), design optimization and experimental production of low-loss antireflection (AR) coatings are carried out. Design-optimization studies that make use of these materials as constituents of a seven-layer coating system demonstrate that when the useful bandwidth of an AR coating is extended to cover a wider spectral range, the designs are in general found to have increased integrated reflection loss, higher ripple, and increased spectral instability.