Urban activities and related infrastructure alter the natural patterns of stream physical and chemical conditions. According to the Urban Stream Syndrome, streams draining urban landscapes are characterized by high concentrations of nutrients and ions, and might have elevated water temperatures and variable oxygen concentrations. Here, we report temporal and spatial variability in stream physic...

The four steps we must take to identify why a species is declining and what can be done about it begin with a natural history study to select correct hypotheses about the likely causal agent (Caughley, 1994). For most readers, this will seem so immediately obvious as not to need page space, but the implication that there are incorrect hypotheses we might erect has been a painfully learned lesso...

Synopsis Neuroecology combines physiological and ecological principles toward understanding behavioral mechanisms and their roles in establishing patterns of organismal abundances and species distributions. This amalgamation of research approaches incorporates the strengths of neuroethology to determine the cellular basis of behavior. It, however, treads where neuroethology does not by establis...

Color flashes on a steady-white background are classically used to isolate the response of the chromatic (color-opponent), as opposed to achromatic (luminance), channel in psychophysical investigations. The present study shows that pupillary responses evoked by such stimuli behave as if they are composed of functionally separable components. One component has a temporally transient waveform and...

When parents are more educated, their children tend to receive more schooling as well. Does this occur because parental ability is passed on genetically or because more educated parents provide a better environment for children to flourish? Using an intergenerational sample of families, we estimate on the basis of a comparison of biological and adopted children that about 65 to 80 percent of th...

Bulk fluorescence measurements could be a faster and cheaper way of enumerating viruses than epifluorescence microscopy, flow cytometry, or transmission electron microscopy (TEM). However, since viruses are not imaged, the background fluorescence compromises the signal, and we know little about its nature. In this paper the size ranges of nucleotides that fluoresce in the presence of SYBR gold ...

background and objective: microscopic evaluation of cervicovaginal smears (pap smear) plays an essential role in detection of preneoplastic and neoplastic lesions of uterine cervix. a wide spectrum of changes is seen in pap smears. interpretation of intermediate changes which resulting in observation of so- called ascus is difficult. ascus is defined as a cellular change that is more marked tha...

comparing the works of sohrab sepehri, iranian contemporary poet and jibran khalil jibran, arabian contemporary author fits the comparative literature in the american school though no such effects have been observed to exist between these two literary characters. one of the commonalities between these two literary figures is naturalism which has been considered as the utopia in their works. the...

BACKGROUND Rural and remote areas are characterised by a shortage of medical practitioners. Rural background has been shown to be a significant factor associated with medical graduates' intentions and decisions to practise within a rural area, though most studies have only used simple definitions of rural background and not previously looked at specialists. This paper aims to investigate in det...