نتایج جستجو برای: bright light

تعداد نتایج: 415955  

ژورنال: طب کار 2018

Objective: In this study we assessed the effect of bright light emitted by light box on fatigue, and sleepiness in nurses. Methods: 44 healthy female shift work nurses were allocated into two groups of intervention and control. In the first stage, bright light was emitted to the nurses in the intervention group by the light box, and bright light was not emitted to the control group. In the nex...

Aquatic ecosystems are heterogeneous in terms of light and sound distribution. The aim of this study was to investigate the effect of environmental abiotic factors, light and sound stimuli, on Daphnia (Daphnia magna) swimming behaviour.  Here, we examined behavioural changes of Daphnia (N=24) in response to light and sound treatments simultaneously. The treatments concerned a 2×2 design with br...

Alireza Keshavarz Zahra Abbasi,

: Optical separate spatial dark and bright soliton pairs in steady-state case in one dimension, for a series circuit consisting of two-photon photorefractive (PR) crystal are investigated. Each crystal can be supported the spatial soliton, and at least one must be photovoltaic. The two solitons are known collectively as separate spatial soliton pairs with dark–dark, bright–dark and bright–brigh...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2011
mohammad javad chaichi zahra va'ezi morteza hosseini saman hosseinkhani mojtaba shamsipur

the reaction of hydrogen peroxide and  pheny -9-acridinecarboxylate in the presence of rhodamin b as a fluorophore leads to the emission of either bright blue light  or bright red light, depending on the structure of fluorescer and reaction conditions. the light emitter responsible for the chemi luminescence (cl) reaction is acridone and that the blue light produced with out the fluorescers is ...

Journal: :journal of optoelectronical nano structures 0
alireza keshavarz department of physics, shiraz university of technology, shiraz, iran. zahra abbasi department of physics, marvdasht branch, islamic azad university, marvdasht , iran.

: optical separate spatial dark and bright soliton pairs in steady-state case in one dimension, for a series circuit consisting of two-photon photorefractive (pr) crystal are investigated. each crystal can be supported the spatial soliton, and at least one must be photovoltaic. the two solitons are known collectively as separate spatial soliton pairs with dark–dark, bright–dark and bright–brigh...

Mohammad Javad Chaichi, Mojtaba Shamsipur, Morteza Hosseini Saman Hosseinkhani Zahra Va'ezi

The reaction of hydrogen peroxide and  pheny -9-acridinecarboxylate in the presence of rhodamin B as a fluorophore leads to the emission of either bright blue light  or bright red light, depending on the structure of fluorescer and reaction conditions. The light emitter responsible for the Chemi Luminescence (CL) reaction is acridone and that the blue light produced with out the fluorescers...

Journal: :JBI database of systematic reviews and implementation reports 2016
Shu-Yi Huang Huei-Chuan Sung Hsin-Feng Su

REVIEW QUESTION What is the effectiveness of bright light therapy (BLT) on depressive symptoms in older adults with non-seasonal depression? REVIEW OBJECTIVE The review objective is to determine the current evidence related to the effectiveness of BLT on depressive symptoms in older adults with non-seasonal depression.

Journal: :international journal of occupational hygiene 0
hossein kakooei department of occupational health, school of public health, tehran university of medical sciences, tehran, iran mohammad hadi rahimi department of occupational health, school of public health, tehran university of medical sciences, tehran, iran mostafa hosseini department of biostatistics, school of public health, tehran university of medical sciences, tehran,

research has shown that shift work, in particular night work, can have negative effects on the health, safety and well-being of workers. our study assessed, in a hospital setting, the effects of bright light (bl) on general health and psychological problems during night shift work. in an experimental design, 15 female nurses at a general hospital that located in tehran were exposed to moderate ...

Journal: :American journal of physiology. Regulatory, integrative and comparative physiology 2000
D W Rimmer D B Boivin T L Shanahan R E Kronauer J F Duffy C A Czeisler

In humans, experimental studies of circadian resetting typically have been limited to lengthy episodes of exposure to continuous bright light. To evaluate the time course of the human endogenous circadian pacemaker's resetting response to brief episodes of intermittent bright light, we studied 16 subjects assigned to one of two intermittent lighting conditions in which the subjects were present...

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