OBJECTIVE To compare TLC and RV values obtained by the single-breath helium dilution (SBHD) method with those obtained by whole-body plethysmography (WBP) in patients with normal lung function, patients with obstructive lung disease (OLD), and patients with restrictive lung disease (RLD), varying in severity, and to devise equations to estimate the SBHD results. METHODS This was a retrospecti...

Abstract Iridoids are a class of secondary metabolites found in wide variety plants. typically plants as glycosides, most often to glucose. The genus Stachys L. is one the largest genera Lamiaceae family, containing iridoids. Aim aim this study was isolation and identification iridoids from aerial parts byzantina K. Koch germanica Methods For iridoids, different chromatographic methods (NP-TLC,...

The new mode of two-dimensional gradient thin layer chromatography (MGD-2D TLC) has been presented. Short distance development of sample in the first dimension leads to formation of the preconcentrated narrow zones. They are consecutively separated in the second dimension with the mobile phase gradient in several steps of development until the eluent reaches the further end of the chromatograph...

tlc screening and evaluation of antioxidant, antibacterial activity of onopordon macrocephalum by bioautography methodonopordon known as scotch thistle is a medicinal plant of the asteraceae family that is widely distributed in europe and asia, also it has many valuable medicinal properties as hypotensive and antitumor. thin layer chromatography (tlc) is wildly used in natural product extract a...

Functional residual capacity (FRC), residual volume (RV), vital capacity (VC), and total lung capacity (TLC) were measured in 162 men aged 18.9 to 78.6 years using a multiple breath helium dilution technique. Multiple regression equations were generated to predict these lung parameters from the best weighted combination (p less than or equal to 0.05) of age, mass, standing height, body surface ...

ANTHONISEN, NICHOLAS R. Changes in shunt JEozv, compliance, and volume of lungs during upneic oxygenation. Am. J. Physiol. 207 ( > I : 239-24 I. I g6+-Open-chested denitrogenated cats were studied during so-min periods of apneic oxygenation. Two lung volumes were selected, one about 25y0 of total lung capacity (TLC), and the other one about 55y0 of TLC. Serial measurements were made during apne...

Objective: To establish the fingerprint profile of Wedelia chinensis using thin layer chromatography (TLC) and high performance thin layer chromatography (HPTLC) technique. Methods: TLC and HPTLC studies were carried out in two different solvent systems, which showed different Rf value. Results: TLC profiling of the extract confirm about the presence of various phytochemicals. HPTLC finger prin...