scholarly journals Determination of Safe Level of Benzene Concentration in Mechanics Workshop “X” Tembalang Semarang

2020 ◽  
Keyword(s):  
Safe Level ◽  
Benzene Concentration

Determination of the safe level of the new antidiabetic drug dapagliflozin in the air of the working area

2019 ◽  
Author(s):  
М.И. Голубева ◽  
◽  
И.А. Бобринева ◽  
М.В. Бидевкина ◽  
Э.А. Федорова ◽  
...  
Keyword(s):  
Antidiabetic Drug ◽  
Safe Level

Determining Safe Levels of Mycotoxins

1984 ◽  
Vol 47 (7) ◽  
pp. 570-575 ◽  
Author(s):  
PAT B. HAMILTON
Keyword(s):  
Data Base ◽  
Field Data ◽  
Laboratory Data ◽  
Epidemiological Studies ◽  
Animal Experimentation ◽  
Laboratory Studies ◽  
Safe Level ◽  
Subjective Evaluations ◽  
Increasing Risk

The establishing of safe levels of mycotoxins to date has been a legal rather than scientific exercise. This has resulted in levels which have varied in response to economic and political pressures. The data base for rationally determining safe levels is very small. This has resulted in subjective evaluations of the worth of different studies in attempts to deduce safe levels from experiments designed to demonstrate effects, and in assumed safe levels which vary from field experiences. Using physiological parameters other than growth as criteria of safety, known deleterious interactions of mycotoxins with other factors, and statistical corrections for inadequate numbers of animals tested, permit better agreement between safe levels determined from laboratory data and from field data. However, the number of animals required makes impractical the laboratory determination of truly safe levels. Well-conceived and executed epidemiological studies coupled with laboratory studies designed to elaborate underlying principles appear to be the best approach to determining safe levels of mycotoxins. Until safe levels are based on sound animal experimentation, the prudent person would assume there is no truly safe level and that increasing levels of mycotoxins carry increasing risk.

Investigating ground vibration to calculate the permissible charge weight for blasting operations of Gotvand-Olya dam underground structures / Badania drgań gruntu w celu określenia dopuszczalnego ciężaru ładunku wybuchowego przy pracach strzałowych w podziemnych elementach tamy w Gotvand-Olya

2012 ◽  
Vol 57 (3) ◽  
pp. 687-697 ◽  
Author(s):  
Saeed Soltani-Mohammadi ◽  
Hassan Bakhshandeh Amnieh ◽  
Moein Bahadori
Keyword(s):  
Minimum Distance ◽  
Hybrid Methods ◽  
Ground Vibration ◽  
Charge Weight ◽  
Underground Structures ◽  
Scaled Distance ◽  
Maximum Charge ◽  
Safe Level ◽  
Surrounding Environment

Abstract Ground vibration, air vibration, fly rock, undesirable displacement and fragmentation are some inevitable side effects of blasting operations that can cause serious damage to the surrounding environment. Peak Particle Velocity (PPV) is the main criterion in the assessment of the amount of damage caused by ground vibration. There are different standards for the determination of the safe level of the PPV. To calculate the permissible amount of the explosive to control the damage to the underground structures of Gotvand Olya dam, use was made of sixteen 3-component (totally 48) records generated from 4 blasts. These operations were recorded in 3 directions (radial, transverse and vertical) by four PG-2002 seismographs having GS-11D 3-component seismometers and the records were analyzed with the help of the DADISP software. To predict the PPV, use was made of the scaled distance and the Simulated Annealing (SA) hybrid methods. Using the scaled distance resulted in a relation for the prediction of the PPV; the precision of the relation was then increased to 0.94 with the help of the SA hybrid method. Relying on the high correlation of this relation and considering a minimum distance of 56.2 m to the center of the blast site and a permissible PPV of 178 mm/s (for a 2-day old concrete), the maximum charge weight per delay came out to be 212 Kg.

scholarly journals Determination of Carcinogenic Toluena Detox Mass In Printing Industrial Workers In Surabaya

2020 ◽  
Author(s):  
Rista Novianti ◽  
abdul rohim tualeka ◽  
Ng Yee Guan
Keyword(s):  
Body Weight ◽  
Threshold Value ◽  
Printing Industry ◽  
Industrial Workers ◽  
Cross Sectional ◽  
Beef Liver ◽  
Toluene Concentration ◽  
Work Duration ◽  
Benzene Concentration

Abstract Background This study aims to calculate the intake of foods rich in CYP2E1 enzymes and glutathione to increase toluene detoxification. Methods The research design used was a cross sectional method. The research location is printing industry in Surabaya, East Java. The number of respondents was 30 workers of the printing industry. The calculated variables included body weight, work duration (years), work frequency per week (days), average workday (hours) of the respondent and benzene concentration. After all variables were obtained, respiration rate and carcinogenic detox benzene food intake per respondent were determined. Results All respondents who were at work showed benzene concentrations below the threshold value (TLV). Foods containing CYP2E1 enzyme included beef liver, salmon and fish oil while food with glutathione included grapes, avocados and asparagus. Conclusion Adequacy levels of CYP2E1 enzymes and glutathione are different and varied. The effective dose required by each respondent depends on body weight, length of work, and toluene concentration at work. In sum, the greater the toluene concentration, the greater the dietary needs which are rich in enzymes and CYP2E1 glutathione. Each respondent can choose benzene detox food depending on their needs and appetite.

scholarly journals Probabilistic nature of water and environmental standards

2021 ◽  
Vol 2094 (5) ◽  
pp. 052016
Author(s):  
M Rosental ◽  
G A Sambursky
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Maximum Permissible Concentration ◽  
Water Bodies ◽  
Environmental Standards ◽  
Safe Level ◽  
Toxicant Concentration ◽  
Toxicological Studies ◽  
Probabilistic Nature

Abstract Determination of permissible concentrations of pollutants in relation to water bodies and water quality is the basis for further measures to form technological approaches to water treatment and wastewater treatment, to determine the standards of permissible exposure and technological indicators. The main standard, which is the basis for such calculations - the maximum permissible concentration (MPC) of pollutants or the approximate safe level of exposure (S), are threshold (deterministic) values. It is assumed that the establishment, for example, of the MPC for fisheries water bodies is based on the analysis of toxicological indicators. However, in fact, rationing is carried out on the basis of selective toxicological studies [1], which do not provide such determinism. The obtained data characterize only the influence of the selected levels of toxicant concentration on the studied organisms.

scholarly journals METHODOLOGICAL AND CONCEPTUAL PROBLEMS OF OIL POLLUTION IN SOIL

2019 ◽  
Vol 96 (10) ◽  
pp. 929-933 ◽  
Author(s):  
Nikolay V. Rusakov ◽  
M. A. Vodyanova ◽  
N. Yu. Starodubova ◽  
L. G. Donerian
Keyword(s):  
Quantitative Determination ◽  
Petroleum Hydrocarbons ◽  
Oil Pollution ◽  
Component Composition ◽  
State Regulation ◽  
Hydrocarbon Contamination ◽  
Industrial Processing ◽  
Environmental Objects ◽  
Safe Level

The relevance of the normalization of petroleum hydrocarbons in soil is due, inter alia, to their ubiquity. Negative impacts on soil cover, atmospheric air, surface and groundwaters, ecological systems and public health are noted at all stages of development of oil fields - from drilling to industrial processing, liquidation of equipment and delivery to the consumer. In addition, various technologies for the destruction of oil contamination (re-cultivation, sanitation, etc.) are actively being developed, but they are not widely used, because there is no norm for a safe level of their content for humans and environmental objects. The article deals with problems of hygienic regulation of petroleum hydrocarbons in the soil. Methods are presented for the quantitative determination of oil and oil products in soil, as well as conceptual issues in the system for estimating oil as a soil pollutant. The subordinate legislation, taking into account the lists of pollutants, in respect of which state regulation measures in the field of environmental protection are applied, are sanctified. Toxic oxygen-containing products are shown to be formed asa result of the transformation of the hydrocarbon component of the component composition of the oil. Threshold concentrations of the safe content of petroleum hydrocarbons in the soil in a vegetation experiment (500 mg/kg), water migration - 10,000 mg/kg and a total of 21,000 mg/kg were determined. Priority directions of research on the establishment of a safe level of oil hydrocarbon contamination in the soil according to the airborne migration index of harmfulness, as well as the quantitative determination of petroleum hydrocarbons in agricultural plants are indicated.

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