[1] Modulated high frequency (HF, 3–10 MHz) heating of the ionosphere in the presence of the auroral electrojet currents is an effective method for generating extremely low frequency (ELF, 3–3000 Hz) and very low frequency (VLF, 3–30 kHz) radio waves. The amplitudes of ELF/VLF waves generated in this manner depend sensitively on the auroral electrojet current strength, which varies with time. I...

background & aim: thymus daenensis celak. is one of the herbal and  perennial medicinal plants belonging to lamiaceae which grows widely in isfahan and chaharmahal va bakhtiari provinces. all of its floral on aerial part has extensive use in preparing traditional medicines. the major constitutes of thymus daenensis celak. are thymol and carvacrol. since ecological conditions have a great ro...

Objectives: To characterize the demographic and clinical profiles of patients with Idiopathic Pulmonary Arterial Hypertension (IPAH) admitted to the tertiary care hospital in Aseer region, and to evaluate the altitude effect. Design: A retrospective cohort study. Setting: Aseer Central Hospital. Subjects: All patients admitted with the diagnosis of (IPAH) during the period from January 2001 to ...

BACKGROUND Anemia refers to a condition having low hemoglobin concentration. Anemia is considered a major risk factor for unfavorable pregnancy outcomes. This is the first study describing the pattern of hemoglobin concentration during pregnancy and its relationship to areas of high and low altitudes in Balochistan (the largest of Pakistan's four provinces). The main objective of this study was...

Background & Aim: Thymus daenensis Celak. is one of the herbal and  perennial medicinal plants belonging to Lamiaceae which grows widely in Isfahan and Chaharmahal va Bakhtiari provinces. All of its floral on aerial part has extensive use in preparing traditional medicines. The major constitutes of Thymus daenensis Celak. are thymol and carvacrol. Since ecolo...

Background & Aim: Thymus daenensis Celak. is one of the herbal and  perennial medicinal plants belonging to Lamiaceae which grows widely in Isfahan and Chaharmahal va Bakhtiari provinces. All of its floral on aerial part has extensive use in preparing traditional medicines. The major constitutes of Thymus daenensis Celak. are thymol and carvacrol. Since ecolo...

By analysing a large set of St. Santin F region Incoherent Scatter (IS) data for low solar activity we find nighttime ion temperature (Ti) on average to be apparently slightly higher than electron temperature (Te). We show that this difference is a bias incurred by the IS spectral analysis procedure owing to the neglect of H ions in the 300-500 km altitude region. Further, we show Te and Ti to ...

BACKGROUND AND PURPOSE At high altitudes barometric pressure is reduced and, thus, less oxygen is inhaled. Reduced oxygen concentration in brain tissue can lead to cerebral damage and neurological and cognitive deficits. The present study was designed to explore the effects of high-altitude exposure using a quantitative MRI technique, voxel-based morphometry. METHODS We studied nine world-cla...

BACKGROUND Kundmannia anatolica Hub.-Mor. is an endemic specie of Apiaceae diversified in Turkey. Several parts of the plant may contain essential oils in different quantity which can be influenced by environmental factors, mainly altitude. The aim of this study was to test whether there is any altitude effect on volatile chemical constituents of essential oil obtained from the fruits of K. ana...

Freshwater molluscs play an important role in aquatic ecosystems, providing food for many fish species and vertebrates. Investigations on factors that determine mollusc species richness and distribution in wetland systems are scarce in the Neotropical region. The main goal of this study was to determine how much variation in mollusc richness and composition is explained by area, hydroperiod, al...