This study was performed to explore the effects of virgin coconut oil (VCO) in male rats that were fed with repeatedly heated palm oil on blood pressure, plasma nitric oxide level, and vascular reactivity. Thirty-two male Sprague-Dawley rats were divided into four groups: (i) control (basal diet), (ii) VCO (1.42 mL/kg, oral), (iii) five-times-heated palm oil (15%) (5HPO), and (iv) five-times-he...

Background: Increased VE/VCO means Ventilatory inefficiency to clear CO. Objective: Determine the influence of Ventilatory inefficiency over exercise capacity in smokers and patients with pulmonary emphysema. Methods: A cardiopulmonary stress test was performed in 56 patients. Influence of VE/VCO over Oxygen consumption (VO), Power (W) Breathing reserve (BR), expiratory flow limitation (EFL) an...

Virgin coconut oil (VCO) has been consumed worldwide for various health-related reasons and some of its benefits have been scientifically evaluated. Medium-chain fatty acids were found to be a potential antidepressant functional food; however, this effect had not been evaluated in VCO, which is rich in polyphenols and medium-chain fatty acids. The aim of this study was to evaluate the antistres...

Oxidative stress and free radicals have been implicated in the pathogenesis of osteoporosis. Therefore, antioxidant compounds have the potential to be used in the prevention and treatment of the disease. In this study, we investigated the effects of virgin coconut oil (VCO) on bone microarchitecture in a postmenopausal osteoporosis rat model. VCO is a different form of coconut oil as it is rich...

—A low-phase-noise, low-power Ka-band VoltageControlled Oscillator (VCO) using cross-coupled pair configuration is presented. The Ka-band VCO circuit uses 0.18 μm SiGe BiCMOS technology. The VCO has low phase noise of -114.6 dBc/Hz at 1 MHz offset from 32.12 GHz carrier frequency and can be tuned from 30.17 to 33.48 GHz. The figure of merit is -202.1 dBc/Hz. The power consumption of the VCO wi...

This paper explores a continuous time (CT) sigma delta ( ) analog-to-digital converter (ADC) based on a dual-voltage-controlled oscillator (VCO)-quantizer-loop structure. A thirdorder ̄lter is adopted to reduce quantization noise and VCO nonlinearity. Even-order harmonics of VCO are signi ̄cantly reduced by the proposed dual-VCO-quantizer-loop structure. The prototype with 10MHz bandwidth and 400...

In this letter, we present a new linearization method for a voltage controlled oscillator (VCO)-based quantizer in an analog-to-digital converter (ADC). The nonlinearity of the VCO generates unwanted harmonic spurs and reduces the signal-to-noise and distortion ratio (SNDR) of the VCO-based quantizer. This letter suggests a frequency-to-current feedback method to effectively suppress harmonic d...

This paper presents design, fabrication and characterization of two differential Colpitts voltage controlled oscillator (VCOs) cross-coupled VCO (CC-VCO) and double cross-coupled VCO (DC-VCO) in InGaP/GaAs HBT technology. Their main parameters like the oscillation frequency, output power and phase noise performance are measured and compared with other recently published studies. In the cores of...

by Le Wang, M.S. Washington State University August 2006 Chair: Deukhyoun Heo This thesis presents a novel low power and low phase noise 0.18-μm CMOS LC voltage controlled oscillator(VCO) for 5 GHz Industrial Scientific Medical (ISM) band. Using a new harmonic filtering technique the phase noise of CMOS LC voltage-controlled oscillator (VCO) is lowered based on the loaded-Q improvement approach...

The robust voltage-controlled oscillator is presented by using the constant current reference and the ring oscillator for the embedded system application. The constant current reference generates the constant current for the succeeding ring oscillator to produce a stable 4MHz oscillation frequency. The proposed VCO circuit was fabricated in a 0.35 μm CMOS technology and worked with a supply vol...