scholarly journals Impact of the service terms on biochemical indices in employees at the potassium ore processing enterprise

2021 ◽  
Vol 100 (5) ◽  
pp. 451-456
Author(s):  
Marina A. Zemlyanova ◽  
Juliya V. Koldibekova ◽  
Ekaterina V. Peskova ◽  
Olga V. Pustovalova ◽  
Viktor M. Ukhabov
Keyword(s):  
Potassium Chloride ◽  
Work Experience ◽  
Working Environment ◽  
Physical Parameters ◽  
Upper Respiratory Tract ◽  
Simultaneous Exposure ◽  
Ore Processing ◽  
Biochemical Indices ◽  
Processing Enterprise

Introduction. The extraction of potash ores is developing at a significant pace. The flotation method is the way to obtain potassium chloride using chemical reagents that have a toxic effect on the respiratory and nervous system, and liver. The complex long-term impact of occupation factors of the working environment with an increase in work experience leads to a rise in the prevalence of diseases of vital organs and systems. The aim of the study is to assess the change in individual biochemical indices of unfavorable responses on the part of the health of workers at a potassium ore processing enterprise, depending on the length of work experience. Materials and methods. The working conditions of workers were assessed, the content of some aldehydes, hexane, and heptane in biological media was investigated, and changes in many biochemical parameters were established. Results. The factors of the working environment in workers at the potassium ore processing enterprise are characterized by the simultaneous exposure to chemicals (potassium chloride, formaldehyde, propionic and butyric aldehydes, hexane and heptane), physical parameters (industrial noise, the microclimate of the working area, the severity of the labor process) and are assessed as harmful (class 3.1). During long-term labor activity (more than ten years), workers have an accumulation of hexane in the urine (1.4 times) and the increased associated content of norepinephrine in blood plasma (up to 1.3 times), not established in workers with up to ten years of work experience. Workers with ten years of work experience and noise with a level of intensity at workplaces exceeding 14.4 dBA showed an increase of 1.3-2.3 times in the level of homocysteine and lipoprotein, not established in workers with a work experience duration of fewer than ten years. No dependence on the service terms was found for changes in sensitization indices of the upper respiratory tract and hepatocytes’ cytolytic activity. Conclusion. The revealed changes in indices with an increase in the length of service require special attention for the early diagnosis of occupational diseases and the development of measures to prevent emerging changes in critical organs and systems.

Features of the long-term dynamics of heart rate variability among workers of a potash ore processing enterprise

2021 ◽  
Vol 61 (7) ◽  
pp. 442-450
Author(s):  
Alexandr E. Nosov ◽  
Nina V. Zaitseva ◽  
Vitalii G. Kostarev ◽  
Julia A. Ivashova ◽  
Maksim A. Savinkov ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Significant Relationship ◽  
Work Experience ◽  
Fine Particles ◽  
Comparison Group ◽  
Stress Index ◽  
Observation Group ◽  
Ore Processing ◽  
Processing Enterprise

Introduction. Currently, the violation of heart rate variability as one of the main pathogenetic mechanisms of the damaging effect of pollutants, associated effects on the cardiovascular system. The study aims to explore the dynamics of the influence of the autonomic nervous system (ANS) on heart rate variability (HRV) in workers of a potassium ore processing enterprise exposed to industrial pollutants (fine fractions of potassium chloride dust, formaldehyde, hexane, heptane) with an assessment of changes in dependence from work experience, establishment of cause-and-effect relationships of violations of heart rate variability with exposure to chemical compounds. Materials and methods. The object of the study was 140 employees of a potash ore processing enterprise, assigned to the observation group, and 76 employees of the administrative and technical apparatus, who made up the comparison group. Samples were taken from the air of the working medium for the content of saturated hydrocarbons (hexane, heptane), the vapors of formhehyde were considered, and the presence of fine particles PM2.5 and PM10 was established. Investigation of biological media (blood, urine) of workers at the enterprise determination of formaldehyde in blood, hexane and heptane in urine. Evaluation of heart rate variability was carried out on a computer electrocardiograph "Poli-Spectr-8/EX" using a cardiorhythmographic program using the method of time analysis, variation pulsometry and spectral analysis. Results. The concentration of fine particles in the air at the workplaces of the observation group was 12-111 times higher for PM2.5, and 5.6-74.6 times higher for PM10 than for the work places of the comparison group. The concentration of formaldehyde, hexane and heptane in the air did not exceed hygienic standards. In the observation group relative to the comparison group, formaldehyde blood was 1.5 times (p<0.001), in the urine of hexane - 1.2 times (p=0.011), heptane - 1.3 times (p=0.046). It was found that with an experience of up to 10 years, formaldehyde in the blood of workers in the observation group was 1.4 times higher than that in the comparison group (p=0.011), with an experience of more than 10 years - 1.7 times (p=0.005). In the urine of workers in the observation group with work experience of up to 10 years, an excess of 1.3 (p=0.026) relative to the comparison group of hexane was found. HRV data analysis. With damage to the length of service in the observation group, there was a significant decrease in the temporal analysis indicators (SDNN, ms, RMSSD, ms, pNN50, %, CV, %), while in the comparison group, only the CV, % decrease was statistically significant; the values of IN conventional units, AMo, % significantly increased (p=0.03 and p=0.003, respectively). A statistically significant relationship was established between the likelihood of an increase depending on the content of heptane in urine (b0=0.22; b1=10.6; F=21.5; R2=0.09; p=0.0001) and formaldehyde in the blood (b0=0.02; b1=6.55; F=69.6; R2=0.25; p=0.0001) in the surveyed workers. Conclusions. Activation of central ergotropic and humoral-metabolic mechanisms, a tendency towards a decrease in parasympathetic influences. The method of logistic regression analysis established a statistically significant relationship between the probability of an increase in the stress index depending on the heptane content in the blood of the surveyed suppliers.

Endurance of Transnationalism in Bolivia’s Valle Alto

2006 ◽  
Vol 3 (1) ◽  
pp. 63-74 ◽  
Author(s):  
Richard C. Jones ◽  
Leonardo De la Torre
Keyword(s):  
Random Sample ◽  
Work Experience ◽  
Household Income ◽  
Return Migration ◽  
Ethnographic Interviews ◽  
The Us ◽  
Foreign Work ◽  
Intentions To Return ◽  
Economic Ties

The increasing difficulty of return migration and the demands for assimilation into host societies suggest a long-term cutting of ties to origin areas—likely accentuated in the Bolivian case by the recent shift in destinations from Argentina to the US and Spain. Making use of a stratified random sample of 417 families as well as ethnographic interviews in the provinces of Punata, Esteban Arze, and Jordán in the Valle Alto region the authors investigate these issues. Results suggest that for families with greater than ten years cumulated foreign work experience, there are significantly more absentees and lower levels of remittances as a percentage of household income. Although cultural ties remain strong after ten years, intentions to return to Bolivia decline markedly. The question of whether the dimunition of economic ties results in long-term village decline in the Valle Alto remains an unanswered.   

REPEATED LONG-TERM SPACE FLIGHTS: PROTEOMIC INVESTIGATIONS OF COSMONAUTS' BLOOD

2020 ◽  
Vol 54 (5) ◽  
pp. 15-22
Author(s):  
I.M. Larina ◽  
◽  
D.N. Kashirina ◽  
K.S. Kireev ◽  
A.I. Grigoriev ◽  
...  
Keyword(s):  
Bone Structure ◽  
Space Station ◽  
The Body ◽  
Coagulation Cascade ◽  
Chemical Components ◽  
Blood Proteins ◽  
Blood Indices ◽  
Before And After ◽  
Biochemical Indices

We performed the first ever comparative analysis of modifications in the proteome, ionogram and some other blood plasma biochemical indices of 18 male cosmonauts (44 ± 6 years of age) before and after maiden or repeated long-term missions to the Russian segment of the International space station (ISS RS). Levels of proteins, substrates and ions as well as chemical components were measured using the LC-MS-based proteomics and routine biochemical techniques. A total of 256 to 281 indices were investigated with the methods of descriptive statistic, regression analysis, and access to bioinformatics resources. It was shown that blood indices recovery from the maiden and repeated missions reflects changes in the body systems and goes at a various speed. The results of measurements made prior to launch and on day 7 after landing are dependent on the number of missions. The bioinformatics techniques showed that after maiden missions both the mediator proteins of alkaline phosphatase (AP) and blood proteins with reliably changing concentrations are associated with the bio-processes including stress, metabolism and DNA reparation, apoptosis, catabolism and proteolysis. During early re-adaptation from repeated missions the AP level was affected by bone remodeling, phosphorylation, angiogenesis and coagulation cascade suggesting a distinct and urgent trigger of the processes of bone structure and mineralization.

scholarly journals Nurses’ Clinical Work Experience during Pregnancy

Healthcare ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 16
Author(s):  
Hyunjung Lee ◽  
Hyoung Eun Chang ◽  
Jiyeon Ha
Keyword(s):  
Work Experience ◽  
Qualitative Data ◽  
Clinical Work ◽  
Working Environment ◽  
Organizational Characteristics ◽  
Main Question ◽  
Field Notes ◽  
Colaizzi's Method ◽  
Induced Changes ◽  
Depth Interviews

The working environment of nurses contains numerous hazards that can be particularly harmful to pregnant women. In addition, pregnancy-induced changes can themselves cause discomfort. Therefore, it is necessary to analyze pregnant nurses’ experiences of clinical work. This qualitative study analyzed data collected through in-depth interviews. From January to June in 2020, 12 shift-work nurses who had experienced pregnancy within three years were interviewed. The main question was “Could you describe your clinical work experience during pregnancy?” Qualitative data from field notes and transcriptions of the interviews were analyzed using Colaizzi’s method. Six categories were extracted that described the nurses’ clinical work experience during pregnancy, as follows: “enduring alone,” “organizational characteristics of nursing,” “risky work environment,” “strengths that sustain work during pregnancy,” “growth as a nurse,” and “methods to protect pregnant nurses.” Pregnant nurses experienced various difficulties due to physical and mental changes during pregnancy, and the clinical working environment did not provide them with adequate support. The findings of this study will be helpful for developing and implementing practical maternity protection policies and work guidelines.

Effect of sulfur baths on the upper respiratory tract and hearing organ

1927 ◽  
Vol 23 (8) ◽  
pp. 856-856
Author(s):  
N. Bobrovsky
Keyword(s):  
Respiratory Tract ◽  
Upper Respiratory Tract ◽  
Upper Airways ◽  
Hearing Organ ◽  
Upper Respiratory

The question of the effect of H2S on the mucosa of the upper respiratory tract and the hearing organ is currently not yet sufficiently developed. Observations of Dr. Mogilnitsky on patients with sulfur baths suggest that H2S acts directly on the mucosa of the upper airways, causing its hyperaemia, increased secretion and reduction of atrophic phenomena; long-term action of H2S, on the contrary, increases atrophic phenomena.

scholarly journals The Be/X-ray binary LS 992/RX J0812.4-3114: Physical parameters and long-term variability

2001 ◽  
Vol 367 (1) ◽  
pp. 266-272 ◽  
Author(s):  
P. Reig ◽  
I. Negueruela ◽  
D. A. H. Buckley ◽  
M. J. Coe ◽  
J. Fabregat ◽  
...  
Keyword(s):  
Physical Parameters ◽  
X Ray

Management of the Extubation Problem in the Premature Child

1980 ◽  
Vol 89 (6) ◽  
pp. 508-511 ◽  
Author(s):  
Robin T. Cotton ◽  
Allan B. Seid
Keyword(s):  
Endotracheal Tube ◽  
Ventilatory Support ◽  
Disease Process ◽  
Upper Respiratory Tract ◽  
Endoscopic Evaluation ◽  
Newborn Period ◽  
Edema Formation ◽  
Premature Child ◽  
Upper Respiratory

Long-term endotracheal intubation is a widely established means of giving ventilatory support in the newborn period. Though such long-term intubation is well tolerated by the premature infant, laryngeal complications do occur and extubation may be impossible even though the initial disease process for which the intubation was performed has resolved. In such a situation, careful endoscopic evaluation of the upper respiratory tract is advocated to identify the site of the problem. If subglottic edema or mucosal ulceration in the subglottic area is the site of the damage and if, during endoscopic evaluation immediately following removal of the endotracheal tube, the subglottic area starts to narrow because of edema formation or edema fluid filling up compressed granulation tissue, then a split of the cricoid in the midline anteriorly, leaving the endotracheal tube in as a stent, appears to be a preferable alternative to performing a tracheotomy. Of 12 consecutive patients, 9 have been successfully extubated.

scholarly journals The Labour Market Participation of Immigrant Women : A Study on Immigrant Women in the Flemingdon Park Area

2021 ◽  
Author(s):  
Sew Ming Tian
Keyword(s):  
Labour Market ◽  
Work Experience ◽  
Immigrant Women ◽  
Labour Force ◽  
Working Environment ◽  
Work Place ◽  
Family Responsibilities ◽  
Face To Face ◽  
Park Area ◽  
And Gender

Through face-to-face interviews with seven immigrant women living in the Flemingdon Park area, this paper explores the barriers that immigrant women encounter in accessing the labour market, and the challenges they face in the labour market. The findings suggest that lack of work experience, language barriers, absence of networks, lack of education, and family responsibilities and gender roles are major barriers that immigrant women have to cope with while accessing the Canadian labour market. Working environment and underemployment appeared to be the challenges that immigrant women who are, or have been in the labour force, had to deal with in the work place.

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