Parasitic nematodes are of major economic importance in livestock. An alternative for the control of parasites is phytotherapy. This study evaluated the efficacy of Cymbopogon citratus decoction (CcD), C. citratus essential oil (CcEo) and citral against Haemonchus contortus using in vitro egg hatch test (EHT) and larval development test (LDT) and an in vivo test using a Meriones unguiculatus (g...

In this paper, we use a feedback to change the orientation and the shape of the center manifold of a system with uncontrollable linearization. This change will directly affect the reduced dynamics on the center manifold, and hence will change the stability properties of the original system.

PURPOSE Theoretical reasoning suggests that direct conversion digital x-ray detectors based upon photoconductive amorphous-selenium (a-Se) could attain very high values of the MTF (modulation transfer function) at spatial frequencies well beyond 20 cycles mm(-1). One of the fundamental factors affecting resolution loss, particularly at x-ray energies just above the K-edge of selenium (12.66 keV...

Cleidocranial dysplasia (CCD) is an autosomal dominant inheritable skeletal disorder characterized by cranial dysplasia, clavicle hypoplasia and dental abnormalities. This disease is mainly caused by heterozygous mutations in RUNX2, a gene that encodes an osteoblast-specific transcription factor. In the present study, mutational analyses of RUNX2 gene were performed on four unrelated Chinese pa...

The activity of apical K(+) channels in cortical collecting duct (CCD) is stimulated and inhibited by protein kinase A (PKA) and C (PKC), respectively. Direct interaction between phosphatidylinositol 4,5-bisphosphate (PIP(2)) and the cloned CCD K(+) channel, ROMK1, is critical for channel opening. We have found previously that phosphorylation of ROMK1 by PKA increases affinity of the channel fo...

We have developed a charge-coupled-device (CCD)-based microspectrophotometer (MSP) system and provide the first report on the successful employment of this technology to measure the spectral absorbance properties of vertebrate photoreceptors. The principal difference between the CCD-based MSP system and wavelength-scanning MSP systems, commonly used in vision biology, is that a short duration (...

Since nitric oxide (NO) participates in the renal regulation of blood pressure, in part, by modulating transport of Na⁺ and Cl⁻ in the kidney, we asked whether NO regulates net Cl⁻ flux (JCl) in the cortical collecting duct (CCD) and determined the transporter(s) that mediate NO-sensitive Cl⁻ absorption. Cl⁻ absorption was measured in CCDs perfused in vitro that were taken from aldosterone-trea...

A small-conductance K+ channel in the apical membrane of rat cortical collecting duct (CCD) cells controls K+ secretion in the kidney. Previously, we observed that the activity of the channel is stimulated by cAMP-dependent protein kinase A (PKA)-induced channel phosphorylation. We now have applied the patch-clamp technique to study the effects of protein kinase C (PKC) on the secretory K+ chan...

Resazurin dye has been broadly used as indicator of cell viability in several types of assays for evaluation of the biocompatibility of medical and dental materials. Mitochondrial enzymes, as carriers of diaphorase activities, are probably responsible for the transference of electrons from NADPH + H+ to resazurin, which is reduced to resorufin. The level of reduction can be quantified by spectr...