A high-current, wide-band transconductance amplifier is described that provides an unprecedented level of output current at high frequencies with exceptional stability. It is capable of converting a signal voltage applied to its input into a groundreferenced output rms current up to 100 A over a frequency range from dc to 100 kHz with a useable frequency extending to 1 MHz. The amplifier has a ...

OBJECTIVE The aim of this study is to combine the ratios of venous serum/colporrhagia and hemoperitoneum/venous serum of human chorionic gonadotropin (hCG) and Progesterone (P) to generate and evaluate a new method to improve the prognosis of Ectopic pregnancy (EP). METHODS For patients with curettage procedure, curettage material and venous blood were obtained at the same time. For patients ...

Is there, for all large values of n, a graph on n vertices with no clique of size 5 log n, and no independent set of size 5 log n? Is there a graph with some number n of vertices, no cycles of length less than 100, and no independent sets of size greater than n/100? Note that such a graph has chromatic number at least 100. Is there, for all large values of n, a graph on n vertices with maximum ...

The process of amygdalin extraction from plum seeds was optimized using central composite design (CCD) and multilayer perceptron (MLP). The effect of time, ethanol concentration, solid-to-liquid ratio, and temperature on the amygdalin content in the extracts was estimated using both mathematical models. The MLP 4-3-1 with exponential function in hidden layer and linear function in output layer ...

The Fe3O4@SiO2@APTMS@Glu-His@V complex was prepared with modification of iron oxide magnetic nanoparticles with (3-aminopropyl) trimethoxysilane (APTMS) and glutaraldehyde-L-histidine Schiff base followed by complexation with VOSO4. Characterization of the Fe3O4@SiO2@APTMS@Glu-His@V complex was carried out by means of FTIR, XRD, SEM, EDX, TEM, AAS and VSM techniques. It was found that Fe3O4@SiO...

This study investigated the strength characteristics of various composites (Tetric Ceram, Tetric Flow, Prisma AP.H, Synergy Duo Shade, Synergy Compact, and Z 100) and compomers (Compoglass, Compoglass F, Dyract AP, F 2000) that were applied in a Class V cavity of a maxillary central incisor. The study was conducted by using a 3-dimensional finite element approach and in the study ansys package ...

This is a retrospective study on Vibrio spp. isolated from patients with diarrhea (both inpatients and outpatients) at Siriraj Hospital, Bangkok, Thailand from January 1994 to December 2001. Of the 33,334 fecal specimens sent for culture, 2,229 (6.68%) were positive for pathogenic bacteria. The most commonly isolated bacteria was Vibrio (1,183 of 2,229 isolates, 53%). Of these 1,183 isolates, t...