نتایج جستجو برای: ozone

تعداد نتایج: 20569  

ژورنال: افق دانش 2020

Aims Myostatin and Myocyte Enhancer Factor 2C (MEF2C) are involved in muscle changes associated with bone problems. The aim of the present study was to determine the effect of three therapeutic methods of exercise, ozone, and stem cells on MEF-2C gene expression and myostatin levels of femoral muscle tissue in osteoarthritis rats. Methods & Materials This experimental study was done on 63 male...

Changes in proximate composition, colour and textural characteristics of ozone-processed shrimp as affected by combined effects of increasing ozone exposures and iced storage were investigated and for the first time. Whilst proximate composition comprised of fat, moisture, and protein contents and colour comprised of L*, a*, b* and metric chroma (C), the texture comprised of adhesiveness, fract...

The binding energy and geometrical structure of all the possible dimeric systems of isothiocyanic acid (HNCS) with ozone have been investigated in the gas phase, theoretically. Six minima located on the singlet potential energy surface of the HNCS–ozone system at the MP2 level with binding energies (corrected with ZPE and BSSE) in the range 492.29–531.40 kcal/mol. All intermolecular interaction...

Background and Objective: The human environment is very sensitive and fragile. In recent years the rate of pollutants has been increasing. Ahvaz city (located in South-West of Iran) with a population of 1,000,000 persons is one of the seven polluted Iranian metropolises. So, the aim of current study was to estimate the number of respiratory and cardiovascular deaths related to ozone expos...

Journal: :international journal of environmental research 2014
p.f. hudak

the objective of this study was to analyze spatial patterns of ground-level ozone concentrationin the dallas-fort worth, texas metropolitan area. average daily maximum eight-hour ozone concentration,number of days with concentrations exceeding 75 ppb, average outside air temperature, and resultant winddirection at 20 monitoring stations were compiled for january-december, 2013. recent estimates...

Gholamreza Ebrahimzadeh, Mahmood Alimohammadi, Maziar Naderi, Vida Past,

Background: Nowadays, the COVID-19 pandemic has become a global problem that new methods must be used to prevent it. The virus is highly contagious and is mainly transmitted through the air. Ozone is a powerful oxidant that can be used to inactivate a wide range of viruses that may be resistant to other disinfectants. The purpose of this study was to review the use and effect of ozone in inacti...

2004
R. Lemoine

Ozone profiles from balloon soundings as well as SAGE II ozone profiles were used to detect anomalous large ozone concentrations of ozone in the lower stratosphere. These secondary ozone maxima are found to be the result of differential advection of ozone-poor and ozone-rich air associated with Rossby wave breaking events. The frequency and intensity of secondary ozone maxima and their geograph...

2014
H. Zhang

There has been significant stratospheric ozone depletion since the late 1970s due to ozone-depleting substances (ODSs). With the implementation of the Montreal Protocol and its amendments and adjustments, stratospheric ozone is expected to recover towards its pre-1980 level in the coming decades. In this study, we examine the implications of stratospheric ozone recovery for the tropospheric che...

2014
S. Meul

The future evolution of tropical ozone in a changing climate is investigated by analysing time slice simulations made with the chemistry–climate model EMAC. Between the present and the end of the 21st century a significant increase in ozone is found globally for the upper stratosphere and the extratropical lower stratosphere, while in the tropical lower stratosphere ozone decreases significantl...

2010
C.-H. Lin Y.-L. Wu

The air layer between the nocturnal boundary layer and the top of the daily mixing layer in an ozonepolluted area is known to serve as an ozone reservoir since the ozone that is produced in the mixing layer on the preceding day is effectively preserved throughout the night in the air layer. Ozone reservoir layers existing at night can enhance the accumulation of surface ozone on the following d...

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