scholarly journals Impact of chronic exposure to naphthalene on physical disorders and neurasthenic symptoms among petrol station workers

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Luqman Riaz ◽  
Abid Ali ◽  
Ikhtiar Ud Din
Keyword(s):  
Chronic Exposure ◽  
Petrol Station ◽  
Physical Disorders

Development of apical pits in chloride cells of the gills of Pimephales promelas after chronic exposure to acid water

1983 ◽  
Vol 41 ◽  
pp. 462-463
Author(s):  
Richard L. Leino ◽  
Jon G. Anderson ◽  
J. Howard McCormick
Keyword(s):  
Confidence Interval ◽  
Chronic Exposure ◽  
Lake Superior ◽  
Pimephales Promelas ◽  
Chloride Cells ◽  
Fathead Minnows ◽  
Secondary Lamellae ◽  
Untreated Water ◽  
Water Ph ◽  
Flow Through

Groups of 12 fathead minnows were exposed for 129 days to Lake Superior water acidified (pH 5.0, 5.5, 6.0 or 6.5) with reagent grade H2SO4 by means of a multichannel toxicant system for flow-through bioassays. Untreated water (pH 7.5) had the following properties: hardness 45.3 ± 0.3 (95% confidence interval) mg/1 as CaCO3; alkalinity 42.6 ± 0.2 mg/1; Cl- 0.03 meq/1; Na+ 0.05 meq/1; K+ 0.01 meq/1; Ca2+ 0.68 meq/1; Mg2+ 0.26 meq/1; dissolved O2 5.8 ± 0.3 mg/1; free CO2 3.2 ± 0.4 mg/1; T= 24.3 ± 0.1°C. The 1st, 2nd and 3rd gills were subsequently processed for LM (methacrylate), TEM and SEM respectively.Three changes involving chloride cells were correlated with increasing acidity: 1) the appearance of apical pits (figs. 2,5 as compared to figs. 1, 3,4) in chloride cells (about 22% of the chloride cells had pits at pH 5.0); 2) increases in their numbers and 3) increases in the % of these cells in the epithelium of the secondary lamellae.

The Effect of Vitamin A on the Intermittent Nitrogen Dioxide Gas Exposure in Hamsters

1976 ◽  
Vol 34 ◽  
pp. 176-177
Author(s):  
J.C.S. Kim ◽  
M.G. Jourden ◽  
E.S. Carlisle
Keyword(s):  
Electron Microscopy ◽  
Vitamin A ◽  
Nitrogen Dioxide ◽  
Chronic Exposure ◽  
Light And Electron Microscopy ◽  
Specific Effect ◽  
Deficient Diet ◽  
Intermittent Exposure ◽  
Hypovitaminosis A ◽  
Gas Exposure

Chronic exposure to nitrogen dioxide in rodents has shown that injury reaches a maximum after 24 hours, and a reparative adaptive phase follows (1). Damage occurring in the terminal bronchioles and proximal portions of the alveolar ducts in rats has been extensively studied by both light and electron microscopy (1).The present study was undertaken to compare the response of lung tissue to intermittent exposure to 10 ppm of nitrogen dioxide gas for 4 hours per week, while the hamsters were on a vitamin A deficient diet. Ultrastructural observations made from lung tissues obtained from non-gas exposed, hypovitaminosis A animals and gas exposed animals fed a regular commercially prepared diet have been compared to elucidate the specific effect of vitamin A on nitrogen dioxide gas exposure. The interaction occurring between vitamin A and nitrogen dioxide gas has not previously been investigated.

Aviation and the Microbiome

2020 ◽  
Vol 91 (8) ◽  
pp. 651-661
Author(s):  
Joshua T. Davis ◽  
Hilary A. Uyhelji
Keyword(s):  
Psychological Health ◽  
Aviation Safety ◽  
Autism Spectrum ◽  
Unintended Consequences ◽  
Microbial Colonization ◽  
Future Research ◽  
Aerospace Medicine ◽  
Medical Certification ◽  
Physical Disorders ◽  
The Impact

INTRODUCTION: Although the impact of microorganisms on their hosts has been investigated for decades, recent technological advances have permitted high-throughput studies of the collective microbial genomes colonizing a host or habitat, also known as the microbiome. This literature review presents an overview of microbiome research, with an emphasis on topics that have the potential for future applications to aviation safety. In humans, research is beginning to suggest relationships of the microbiome with physical disorders, including type 1 and type 2 diabetes mellitus, cardiovascular disease, and respiratory disease. The microbiome also has been associated with psychological health, including depression, anxiety, and the social complications that arise in autism spectrum disorders. Pharmaceuticals can alter microbiome diversity, and may lead to unintended consequences both short and long-term. As research strengthens understanding of the connections between the microbiota and human health, several potential applications for aerospace medicine and aviation safety emerge. For example, information derived from tests of the microbiota has potential future relevance for medical certification of pilots, accident investigation, and evaluation of fitness for duty in aerospace operations. Moreover, air travel may impact the microbiome of passengers and crew, including potential impacts on the spread of disease nationally and internationally. Construction, maintenance, and cleaning regimens that consider the potential for microbial colonization in airports and cabin environments may promote the health of travelers. Altogether, the mounting knowledge of microbiome effects on health presents several opportunities for future research into how and whether microbiome-based insights could be used to improve aviation safety.Davis JT, Uyhelji HA. Aviation and the microbiome. Aerosp Med Hum Perform. 2020; 91(8):651–661.

HISTOPATHOLOGIC CHANGES IN RAT ORGANS UPON CHRONIC EXPOSURE TO FORMALDEHYDE VAPOR

2014 ◽  
Vol 13 (2) ◽  
pp. 127-140
Author(s):  
Snur Muhammad Amin Hassan ◽  
Azad Kareem Saeed ◽  
Nabil Abdul-Massih Salmo ◽  
Ahmed Hamdi Mehdi ◽  
Nali Abdulqadr Maaruf
Keyword(s):  
Chronic Exposure ◽  
Rat Organs ◽  
Formaldehyde Vapor ◽  
Histopathologic Changes

Effects of Chronic Exposure to Electromagnetic Waves at 930 MHz Frequency on Oxidative Stress in Plasma and Some Organs of Wistar Rats

2012 ◽  
Vol 3 (7) ◽  
pp. 1-7
Author(s):  
L. TAZROUT L. TAZROUT ◽  
◽  
K. TALEA K. TALEA ◽  
S. EL AMRANI S. EL AMRANI ◽  
I. M’TOUGUY I. M’TOUGUY ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Chronic Exposure ◽  
Electromagnetic Waves ◽  
Wistar Rats

SPACES AND “NOT-SPACES” IN THE ZHADAN’S PROSE

2019 ◽  
Author(s):  
Halyna Vypasniak
Keyword(s):  
The Novel ◽  
Main Attention ◽  
Petrol Station ◽  
Past Time ◽  
Native Group ◽  
The City

The paper analyses the symbolic features of spaces of Serhiy Zhadan’s prose. The main attention is paid to the novel “Voroshylovhrad” and the name of the city that doesn’t exist on the geographic maps anymore. Most spaces, such as a petrol station or abandoned airfield, could be defined as non-places (the term of M. Auge). For M. Auge it’s a type of space that shows the hybridity of our life. It’s basically the transit places. That is why there are no emotions connected with those non-places: no special stories, no narrative, that could create the place itself. The analysed novel by Serhiy Zhadan assures that even those places that weren’t noticed by most people and were treated by them as non-places, were really precious for others because of their personal memories and their past time, spent there. The paper also analyses the special features of the novel according M. Auge’s term the “anthropologic place”. It’s a place that represents an identity of native group that used to live there and shows the power of a connection between the place and its inhabitants. It’s also a place, where they can feel themselves and make their own rules. Those things make places like the petrol station, worth to be defended from intrusions.

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