We constructed an assembled-type MgF2 cell that can function under a high vacuum (10(-4) Pa), and is capable of measuring the vacuum-ultraviolet circular dichroism (VUVCD) spectrum in a wavelength region down to 140 nm for aqueous solutions. Its path length can be adjusted by various spacers in the range from 1.3 to 50 microm. The temperature-control unit of the cell was also constructed with a...

OBJECTIVES To assay theophylline blood levels in a sample of Sri Lankan chronic asthmatics taking oral theophylline, and to evaluate a simple and cost effective ultraviolet spectrophotometric assay for theophylline levels in blood. SETTING Chronic asthmatics taking oral theophylline attending medical clinics at the National Hospital of Sri Lanka (NHSL) were recruited for the study. Blood samp...

Nitrate contamination of water sources is a global environmental concern. A major source pollution agricultural runoff, which can contain decomposed organic matter, fertilizer, and animal or human waste. adversely affects the stability systems such as dams rivers thus also public health. Regulation essential but difficult to implement, given that measuring nitrates laborious, normally done usin...

Introduction: Azadirachta indica A. Juss, popularly known as neem, has been gaining ground in alternative herbal medicine. This plant offers a constant source of new and unique phytochemicals that are used the development drugs. Aim: A preliminary chemical analysis was carried out to detect secondary metabolites present crude hydroethanolic extract dried macerated leaves evaluate its antioxidan...

A new source-based radiometry beamline was recently constructed at the Synchrotron Ultraviolet Radiation Facility (SURF III). The goal of this beamline is to establish a national source standard with a wide spectral range from the far ultraviolet to the infrared by using the calculability of SURF III. The new beamline is a straight-through white-light beamline with few, if any, optical componen...

background: light is an important and adjustable physical factor in the job environment.this study aimed to determine the intensity of natural and mixed light and also the level of ultraviolet radiation in libraries and computer sites of ilam universities in spring 2011.   methods: in this cross-sectional study, 10 libraries, 16 study saloons, and 7 computer sites were selected. luminosity asse...

The orange fluorescence of scapolite has been confirmed to be caused by (S2)−, but the frequent blue in gem-quality not well explained. An energy dispersive X-ray spectrometer (XRF), electron probe microanalyzer (EPMA), powder diffractometer (XRD), Fourier transform infrared (FTIR), Raman spectrometer, ultraviolet-visible spectrophotometer, and conventional gemological test methods were used st...

The study aimed to investigate the optical properties of thin films made polyethylene oxide dispersed with dopants a fixed amount iodine (0.1 wt %). prepared by casting method were optically investigated as function fillers. used UV-visible spectrophotometer technique wavelength ranging from (200 800) nm and determined absorption coefficient, refractive index, energy gap, extinction conductivit...