In proliferating cell populations, the inability to reproduce indefinitely is the only relevant criterion to assess cell lethality. The in vitro colony formation technique (CF) used to determine reproductive death is, however, too slow and has several technical limitations. For finding suitable, more rapid techniques that assessed drug-induced cell killing, a human lymphoma cell line was expose...

In the study of evolution Gaussian beam in saturated nonlinear media, it is found that probability optical rogue waves changes with change nonlinearity. The light intensity distribution on exit surface medium can be characterized by scintillation index, and wave corresponds to index. shows a complex trend Lyapunov exponent power spectrum method are used determine chaotic evolution.

The Organic Bound Tritium (OBT) amount in the body may induce changes in the evaluation of the internal exposure to tritium, due to its different retention time relative to HTO. OBT measurements for urine are not performed routinely, mainly because of the lengthy work needed in preparation of the samples, when using the standard oxygen combustion method. A simpler and more rapid method based on...

Scintillation noise due to the Earth’s turbulent atmosphere can be a dominant noise source in high-precision astronomical photometry when observing bright targets from the ground. Here we describe the phenomenon of scintillation from its physical origins to its effect on photometry. We show that Young’s scintillation-noise approximation used by many astronomers tends to underestimate the median...

The uncertainty in measurements of gross alpha and beta activities in water samples by liquid scintillation counting with alpha/beta discrimination has been evaluated considering the problems typical of low-level measurements of environmental samples. The use of a pulse shape analysis device to discriminate alpha and beta events introduces a correlation between some of the input quantities, and...

Ionospheric scintillation has a great impact on radio propagation and electronic system performance, thus is extensively studied currently. The influence of scintillation on Global Navigation Satellite System (GNSS) is particularly evident, making GNSS an effective medium to study characteristics of scintillation. Ionospheric scintillation varies greatly in relation with temporal and spatial di...

In this study, the scintillation and optical properties of pure and silver doped potassium chloride (KCl:Ag) single crystals were reported. Pure and doped KCl bulk single crystals with a good optical quality and free from cracks were grown from the melt using Czochralski technique. Different analysis methods were used to study the optical and scintillation properties of the grown crystals. The ...

Over the last few decades many techniques have been developed for determination of Sr/Y in the environment. Čerenkov counting technique (developed in the 1960s) is widely used, but can be further developed by the application of emerging technologies. For example, it is believed that the application of the triple-to-double coincidence ratio (TDCR) liquid scintillation counting method can be used...

where C n(h) is the vertical profile of the refractive index structure constant, V (h) is the vertical profile of the modulus of the wind speed. In the following we always assume that τ0 refers to the wavelength λ0 = 0.5 μm. The MASS instrument implements an approximate method of estimating τ0 from the differentialexposure scintillation index, DESI. DESI is computed for the smallest 2-cm MASS a...