Pub Date : 2021-06-10DOI: 10.32006/eeep.2021.1.1724
Katya B. Popova, M. Mincheva, M. Yavahchova, N. Goutev, D. Tonev
Over the past decade, antisense technology has successfully established itself as an entirely innovative platform for research and creation of new therapies. Significant advances in the design of antisense oligonucleotides, as well as a deeper understanding of their mechanisms of action, have led to their successful clinical application in many RNA-targeted therapies. In addition, their potential for in vivo imaging by radiolabeling has been identified. Here are discussed the prospects for the use of antisense oligonucleotides in nuclear medicine and highlighted some of the advantages and disadvantages of labelling them with radionuclides.
{"title":"ANTISENSE OLIGONUCLEOTIDES AND RADIONUCLIDES – PERSPECTIVES","authors":"Katya B. Popova, M. Mincheva, M. Yavahchova, N. Goutev, D. Tonev","doi":"10.32006/eeep.2021.1.1724","DOIUrl":"https://doi.org/10.32006/eeep.2021.1.1724","url":null,"abstract":"Over the past decade, antisense technology has successfully established itself as an entirely innovative platform for research and creation of new therapies. Significant advances in the design of antisense oligonucleotides, as well as a deeper understanding of their mechanisms of action, have led to their successful clinical application in many RNA-targeted therapies. In addition, their potential for in vivo imaging by radiolabeling has been identified. Here are discussed the prospects for the use of antisense oligonucleotides in nuclear medicine and highlighted some of the advantages and disadvantages of labelling them with radionuclides.","PeriodicalId":369361,"journal":{"name":"Ecological Engineering and Environment Protection","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117204929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-10DOI: 10.32006/eeep.2021.1.0516
Kneev Sharma, D. Karamanev
Understanding the fundamental relationship between atmospheric carbon dioxide concentration and temperature rise is essential for tackling the problem of climate change that faces us today. Misconceptions regarding the relationship are widespread due to media and political influences. This investigation aims to address the popular misconception that CO2 concentration directly and naturally leads to global temperature rise. While anthropogenic CO2 emissions seem to affect the rising global atmospheric temperature with a confidence of 95%, it falters when the historical relationship using ice core data is studied. This investigation uses two statistical approaches to determine an accurate range and direction for this important relationship. Through a combined approach, it was found that historically CO2 concentration in the last 650 000 years lags global temperature rise by 1020-1080 years with a maximum correlation coefficient of 0.8371-0.8372. This result is important for the investigation of climate change.
{"title":"INVESTIGATING THE HISTORICAL CORRELATION BETWEEN ATMOSPHERIC CARBON DIOXIDE CONCENTRATION AND GLOBAL TEMPERATURE CHANGE","authors":"Kneev Sharma, D. Karamanev","doi":"10.32006/eeep.2021.1.0516","DOIUrl":"https://doi.org/10.32006/eeep.2021.1.0516","url":null,"abstract":"Understanding the fundamental relationship between atmospheric carbon dioxide concentration and temperature rise is essential for tackling the problem of climate change that faces us today. Misconceptions regarding the relationship are widespread due to media and political influences. This investigation aims to address the popular misconception that CO2 concentration directly and naturally leads to global temperature rise. While anthropogenic CO2 emissions seem to affect the rising global atmospheric temperature with a confidence of 95%, it falters when the historical relationship using ice core data is studied. This investigation uses two statistical approaches to determine an accurate range and direction for this important relationship. Through a combined approach, it was found that historically CO2 concentration in the last 650 000 years lags global temperature rise by 1020-1080 years with a maximum correlation coefficient of 0.8371-0.8372. This result is important for the investigation of climate change.","PeriodicalId":369361,"journal":{"name":"Ecological Engineering and Environment Protection","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127385847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-10DOI: 10.32006/eeep.2021.1.2535
C. Lasseur, M. Mergeay
The 3-days international virtual MELiSSA conference (November 3 to 5, 2020) about the closed life support systems was organized by the University of Ghent and IDDUP in collaboration with ESA/ESTEC (European Space Agency) and MELiSSA Foundation, and welcomed around 150 papers. The first day addressed the welcomed contributions of the 5 major space agencies, the plants & photosynthetic microorganisms used for life support in space, the simulation of planetary ecosystems as well as MELiSSA inspired circular economy and education. The second day focused on Ground demonstration and analogue testing, Photobioreactors and photosynthetic microorganisms characterization, Modelling and Systems design, Organic wastes process and Metabolome where a real breakthrough was observed as well as in human microbiome in closed environments. The last day addressed: 1) the complex problematics of urine as a major source of nutrients, 2) Terrestrial synergies, and 3) some Physical, Chemical and Microbial contaminants linked to space research.
{"title":"CURRENT AND FUTURE WAYS TO CLOSED LIFE SUPPORT SYSTEMS: VIRTUAL MELISSA CONFERENCE, GHENT (B) (3-5 /11/2020). A REVIEW","authors":"C. Lasseur, M. Mergeay","doi":"10.32006/eeep.2021.1.2535","DOIUrl":"https://doi.org/10.32006/eeep.2021.1.2535","url":null,"abstract":"The 3-days international virtual MELiSSA conference (November 3 to 5, 2020) about the closed life support systems was organized by the University of Ghent and IDDUP in collaboration with ESA/ESTEC (European Space Agency) and MELiSSA Foundation, and welcomed around 150 papers. The first day addressed the welcomed contributions of the 5 major space agencies, the plants & photosynthetic microorganisms used for life support in space, the simulation of planetary ecosystems as well as MELiSSA inspired circular economy and education. The second day focused on Ground demonstration and analogue testing, Photobioreactors and photosynthetic microorganisms characterization, Modelling and Systems design, Organic wastes process and Metabolome where a real breakthrough was observed as well as in human microbiome in closed environments. The last day addressed: 1) the complex problematics of urine as a major source of nutrients, 2) Terrestrial synergies, and 3) some Physical, Chemical and Microbial contaminants linked to space research.","PeriodicalId":369361,"journal":{"name":"Ecological Engineering and Environment Protection","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133180668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-10DOI: 10.32006/eeep.2021.1.7882
Plamen Glogov, Dimitar Dimitrov
The paper presents a comparative analysis of the data on the main climatic components for three periods - 1921-1945; 1965-1975; 2000-2015 and their connection with the distribution of Invasive alien plant species (IAS) on the territory of Lozenska Mountain. Among the most important features of the mountain’s climate that favorably affect the spread of IAS are the two precipitation maximums and minimums and the period of drought. In response to climate and other environmental changes, IAS on the territory of the mountain are spread in two ways - by forming monodominant communities in extreme habitats or by integrating their populations into the local communities and gradually increasing their presence in them, accompanied by changing ecological conditions of the habitat. Four potential invasive alien plant species (PIAS) have been identified: Opuntia fragilis (Nutt.) Haw., Opuntia engelmannii Salm-Dyck ex Engelmann, Lupinus polyphylus Lindl., Impatiens baulfourii Hook.f., to which population monitoring and control measures need to be implemented.
{"title":"INFLUENCE OF CLIMATE CHANGE ON THE SPREAD OF INVASIVE ALIEN PLANT SPECIES IN THE TERRITORY OF THE LOZENSKA MOUNTAIN","authors":"Plamen Glogov, Dimitar Dimitrov","doi":"10.32006/eeep.2021.1.7882","DOIUrl":"https://doi.org/10.32006/eeep.2021.1.7882","url":null,"abstract":"The paper presents a comparative analysis of the data on the main climatic components for three periods - 1921-1945; 1965-1975; 2000-2015 and their connection with the distribution of Invasive alien plant species (IAS) on the territory of Lozenska Mountain. Among the most important features of the mountain’s climate that favorably affect the spread of IAS are the two precipitation maximums and minimums and the period of drought. In response to climate and other environmental changes, IAS on the territory of the mountain are spread in two ways - by forming monodominant communities in extreme habitats or by integrating their populations into the local communities and gradually increasing their presence in them, accompanied by changing ecological conditions of the habitat. Four potential invasive alien plant species (PIAS) have been identified: Opuntia fragilis (Nutt.) Haw., Opuntia engelmannii Salm-Dyck ex Engelmann, Lupinus polyphylus Lindl., Impatiens baulfourii Hook.f., to which population monitoring and control measures need to be implemented.","PeriodicalId":369361,"journal":{"name":"Ecological Engineering and Environment Protection","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122376050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-10DOI: 10.32006/eeep.2021.1.3648
V. Hovorukha, O. Havryliuk, G. Gladka, Bida Iryna, Y. Danko, O. Shabliy, O. Tashyrev
Fossil carbon-containing fuel is currently one of the most common in industry and economy. The rapid depletion of reserves of this fuel makes it necessary to search for the alternative one. Landfills are a place where methane is spontaneously synthesized due to the decay of organic waste. Controlled and regulated fermentation of the landfill organics can provide biomethane as well as environmental bioremediation. The aim of the work was to study the patterns of methane fermentation of multi component organic waste and optimize the process to increase the efficiency of biomethane synthesis and waste decomposition. Colorimetric and potentiometric methods were used for pH and Eh measurement. Volumetric and chromatographic methods were applied to control volume and composition of synthesized gas. Fermentation parameters were calculated with the use of mathematical and statistical ones. The achievement of high efficiency of methane fermentation of organic waste due to the process regulation was shown. The modeling of unregulated fermentation of organic waste in landfills showed low efficiency of the process. It took 69 days. Weight of waste decreased only 5 times. Hydrogen yield was 5 L/kg of waste. Methane was not synthesized. The regular mass transfer, regulation of the process and waste grinding showed the greatest efficiency. Weight of waste decreased 20 times during only 14 days. Hydrogen yield was 27 L/kg, methane yield was 12 L/kg of waste. Thus, the absence of regulation caused long term decay of waste. The high efficiency is achieved due to regulation of the fermentation process. The results will serve as a basis for the development of industrial biotechnology for the utilization of organic waste to reduce the volume of existing landfills and produce methane energy. This will further allow bioremediation of contaminated areas, obtaining an alternative to fossil fuel biomethane.
{"title":"GASEOUS FUEL OBTAINING VIA FERMENTATION OF ORGANIC LANDFILL WASTE","authors":"V. Hovorukha, O. Havryliuk, G. Gladka, Bida Iryna, Y. Danko, O. Shabliy, O. Tashyrev","doi":"10.32006/eeep.2021.1.3648","DOIUrl":"https://doi.org/10.32006/eeep.2021.1.3648","url":null,"abstract":"Fossil carbon-containing fuel is currently one of the most common in industry and economy. The rapid depletion of reserves of this fuel makes it necessary to search for the alternative one. Landfills are a place where methane is spontaneously synthesized due to the decay of organic waste. Controlled and regulated fermentation of the landfill organics can provide biomethane as well as environmental bioremediation. The aim of the work was to study the patterns of methane fermentation of multi component organic waste and optimize the process to increase the efficiency of biomethane synthesis and waste decomposition. Colorimetric and potentiometric methods were used for pH and Eh measurement. Volumetric and chromatographic methods were applied to control volume and composition of synthesized gas. Fermentation parameters were calculated with the use of mathematical and statistical ones. The achievement of high efficiency of methane fermentation of organic waste due to the process regulation was shown. The modeling of unregulated fermentation of organic waste in landfills showed low efficiency of the process. It took 69 days. Weight of waste decreased only 5 times. Hydrogen yield was 5 L/kg of waste. Methane was not synthesized. The regular mass transfer, regulation of the process and waste grinding showed the greatest efficiency. Weight of waste decreased 20 times during only 14 days. Hydrogen yield was 27 L/kg, methane yield was 12 L/kg of waste. Thus, the absence of regulation caused long term decay of waste. The high efficiency is achieved due to regulation of the fermentation process. The results will serve as a basis for the development of industrial biotechnology for the utilization of organic waste to reduce the volume of existing landfills and produce methane energy. This will further allow bioremediation of contaminated areas, obtaining an alternative to fossil fuel biomethane.","PeriodicalId":369361,"journal":{"name":"Ecological Engineering and Environment Protection","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129503291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-10DOI: 10.32006/eeep.2021.1.6167
J. Harmand
This paper aims at discussing the two main modeling schemes that are used to describe dynamically the growth of microbial ecosystems, that are resource and density-dependent growth functions, respectively. Monod has been the first to hypothesize that this growth is, before all, an increasing saturated function of the main limiting substrate concentration. Contois assumed that the growth is not only a function of the substrate but also of the biomass density-itself, and thus the name « density-dependent ». In re examining their respective experiments (species used, conditions of experiments, mode of reactor functioning, measurement techniques), we try to understand the engines for a density-dependent phenomenon to appear. In particular, we refer to recent experiments where it was shown that density-dependent appeared as soon as the biomass structures into flocs or in the presence of filamentous bacteria even at relatively low concentrations. Based on this historical review of data, it is shown that density-dependent kinetics is not systematically a question of biomass density but rather related to its structure within the medium and to the mobility of microbial cells.
{"title":"GROWTH MODELS IN MICROBIAL ECOSYSTEMS - RESOURCE OR DENSITY DEPENDENCE?","authors":"J. Harmand","doi":"10.32006/eeep.2021.1.6167","DOIUrl":"https://doi.org/10.32006/eeep.2021.1.6167","url":null,"abstract":"This paper aims at discussing the two main modeling schemes that are used to describe dynamically the growth of microbial ecosystems, that are resource and density-dependent growth functions, respectively. Monod has been the first to hypothesize that this growth is, before all, an increasing saturated function of the main limiting substrate concentration. Contois assumed that the growth is not only a function of the substrate but also of the biomass density-itself, and thus the name « density-dependent ». In re examining their respective experiments (species used, conditions of experiments, mode of reactor functioning, measurement techniques), we try to understand the engines for a density-dependent phenomenon to appear. In particular, we refer to recent experiments where it was shown that density-dependent appeared as soon as the biomass structures into flocs or in the presence of filamentous bacteria even at relatively low concentrations. Based on this historical review of data, it is shown that density-dependent kinetics is not systematically a question of biomass density but rather related to its structure within the medium and to the mobility of microbial cells.","PeriodicalId":369361,"journal":{"name":"Ecological Engineering and Environment Protection","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125096060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-10DOI: 10.32006/eeep.2021.1.4960
H. Najdenski, L. Dimitrova, Veselin Akivanov, V. Hubenov, Snejanka Mihailova, P. Grozdanov, M. Iliev, V. Kussovski, L. Kabaivanova, I. Simeonov
A study on the anaerobic digestion of wheat straw in a pilot scale bioreactor with an organic load of 2, 5, 7, 10 and 20 g/l and a process duration of 18 to 80 days was performed. The pilot bioreactor used has a computerized system for control and monitoring of various operational parameters – temperature, pH, biogas composition, etc. Total solids, total organics and volatile fatty acids were measured by standard methods and gas chromatography. Daily biogas yield and its main components (CH4, CO2, H2S) were analysed too. During the anaerobic digestion, different species of microorganisms have been isolated from the genera Bacillus, Pseudomonas, Enterococcus and Aeromonas, as well as the species Terribacillus halophilus. With a known pathogenic potential are described Pseudomonas sp., Enterococcus sp. and Aeromonas sp. Studies on the antimicrobial resistance of all isolated strains show resistance to ampicillin, amoxicillin, bacitracin, ceftriaxone, gentamicin and vancomycin. The cellulose degrading activity of some of the bacterial isolates, their pathogenic potential and antimicrobial resistance are discussed in detail in the light of the data on the mechanisms of proven resistance.
{"title":"ANAEROBIC DIGESTION OF WHEAT STRAW AND MICOBIOLOGICAL ASSESMENT OF THE RESULTED DIGESTATE","authors":"H. Najdenski, L. Dimitrova, Veselin Akivanov, V. Hubenov, Snejanka Mihailova, P. Grozdanov, M. Iliev, V. Kussovski, L. Kabaivanova, I. Simeonov","doi":"10.32006/eeep.2021.1.4960","DOIUrl":"https://doi.org/10.32006/eeep.2021.1.4960","url":null,"abstract":"A study on the anaerobic digestion of wheat straw in a pilot scale bioreactor with an organic load of 2, 5, 7, 10 and 20 g/l and a process duration of 18 to 80 days was performed. The pilot bioreactor used has a computerized system for control and monitoring of various operational parameters – temperature, pH, biogas composition, etc. Total solids, total organics and volatile fatty acids were measured by standard methods and gas chromatography. Daily biogas yield and its main components (CH4, CO2, H2S) were analysed too. During the anaerobic digestion, different species of microorganisms have been isolated from the genera Bacillus, Pseudomonas, Enterococcus and Aeromonas, as well as the species Terribacillus halophilus. With a known pathogenic potential are described Pseudomonas sp., Enterococcus sp. and Aeromonas sp. Studies on the antimicrobial resistance of all isolated strains show resistance to ampicillin, amoxicillin, bacitracin, ceftriaxone, gentamicin and vancomycin. The cellulose degrading activity of some of the bacterial isolates, their pathogenic potential and antimicrobial resistance are discussed in detail in the light of the data on the mechanisms of proven resistance.","PeriodicalId":369361,"journal":{"name":"Ecological Engineering and Environment Protection","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115449197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-10-15DOI: 10.32006/eeep.2020.2.1520
E. Yucel, M. Yucel
In this study, the usage of the peppermint (Mentha piperita) for extracting the metal ions [Mg (II), Cr (II), Ni (II), Cu (II), Zn (II), Cd (II), Pb (II)] that exist at water was investigated. In order to analyze the stability properties, Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherms were used at removing the metal ions and the highest correlation coefficients (R2) were obtained at Langmuir isotherm. Therefore, it is seen that the Langmuir model is more proper than the Freundlich model. However, it was found that the correlation coefficients of removing Ni and Cd is higher at Freundlich model than Langmuir and low at Dubinin-Radushkevich isotherm. It is established that the biosorption amount increase depends on the increase of biosorbent and it can be achieved high efficiency (95%) even with small amount (0.6 mg, peppermint extract) at lead ions. It is also determined that the peppermint extracted that is used at this study shows high biosorption capacity for metal ions and can be used for immobilization of metals from polluted areas.
{"title":"REMOVAL OF HEAVY METAL Cr (II), Ni (II), Cu (II), Zn (II), Cd (II), Pb (II) IONS FROM AQUEOUS SOLUTION BY MENTHA PIPERITA EXTRACT","authors":"E. Yucel, M. Yucel","doi":"10.32006/eeep.2020.2.1520","DOIUrl":"https://doi.org/10.32006/eeep.2020.2.1520","url":null,"abstract":"In this study, the usage of the peppermint (Mentha piperita) for extracting the metal ions [Mg (II), Cr (II), Ni (II), Cu (II), Zn (II), Cd (II), Pb (II)] that exist at water was investigated. In order to analyze the stability properties, Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherms were used at removing the metal ions and the highest correlation coefficients (R2) were obtained at Langmuir isotherm. Therefore, it is seen that the Langmuir model is more proper than the Freundlich model. However, it was found that the correlation coefficients of removing Ni and Cd is higher at Freundlich model than Langmuir and low at Dubinin-Radushkevich isotherm. It is established that the biosorption amount increase depends on the increase of biosorbent and it can be achieved high efficiency (95%) even with small amount (0.6 mg, peppermint extract) at lead ions. It is also determined that the peppermint extracted that is used at this study shows high biosorption capacity for metal ions and can be used for immobilization of metals from polluted areas.","PeriodicalId":369361,"journal":{"name":"Ecological Engineering and Environment Protection","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121995788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-10-15DOI: 10.32006/eeep.2020.2.2127
E. Geleva, H. Protohristov, N. Goutev, Vladimir Bashev, S. Genchev, D. Tonev
The activity of naturally occurring radionuclides in mineral waters from certain most frequently used sources in Rhodope Mountains region, Southern Bulgaria has been measured with high precision by means of nuclear and radiochemical methods. The survey is pointed at radium-226 (226Ra), lead-210 (210Pb) and natural uranium (nat. U), which are most important from the point of view of public health in Bulgaria, because of their high toxicity and radiotoxicity in drinking water. Seventeen water sources were under investigation. The activity concentrations of 226Ra and 210Pb varied from 13 to168 mBq/L and from ≤ 1.8 to 104 mBq/L respectively. The concentration of nat. U in the mineral water was in the range ≤ 3 to 21 µg/L. The annual effective doses were calculated for all investigated waters for adult inhabitants assuming yearly consumption of 730 litres. The results have shown that all values of the annual effective dose of ingestion of mineral waters were below the individual dose criterion of 100 µSv/y reported by World Health Organization (WHO). The obtained new results are used to assess the radiation status of the investigated waters. They will support timely and adequate measures to reduce the harmful impact of ionizing radiation on the population in cases of increased radioactivity
{"title":"INVESTIGATION OF NATURAL RADIOACTIVITY OF MINERAL WATERS IN SOUTHERN BULGARIA","authors":"E. Geleva, H. Protohristov, N. Goutev, Vladimir Bashev, S. Genchev, D. Tonev","doi":"10.32006/eeep.2020.2.2127","DOIUrl":"https://doi.org/10.32006/eeep.2020.2.2127","url":null,"abstract":"The activity of naturally occurring radionuclides in mineral waters from certain most frequently used sources in Rhodope Mountains region, Southern Bulgaria has been measured with high precision by means of nuclear and radiochemical methods. The survey is pointed at radium-226 (226Ra), lead-210 (210Pb) and natural uranium (nat. U), which are most important from the point of view of public health in Bulgaria, because of their high toxicity and radiotoxicity in drinking water. Seventeen water sources were under investigation. \u0000The activity concentrations of 226Ra and 210Pb varied from 13 to168 mBq/L and from ≤ 1.8 to 104 mBq/L respectively. The concentration of nat. U in the mineral water was in the range ≤ 3 to 21 µg/L.\u0000The annual effective doses were calculated for all investigated waters for adult inhabitants assuming yearly consumption of 730 litres.\u0000The results have shown that all values of the annual effective dose of ingestion of mineral waters were below the individual dose criterion of 100 µSv/y reported by World Health Organization (WHO).\u0000The obtained new results are used to assess the radiation status of the investigated waters. They will support timely and adequate measures to reduce the harmful impact of ionizing radiation on the population in cases of increased radioactivity","PeriodicalId":369361,"journal":{"name":"Ecological Engineering and Environment Protection","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114386350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-10-15DOI: 10.32006/eeep.2020.2.4551
Plamen Glogov, M. Georgieva
The study covers Phase 2 of the ecological-phytogeographic analysis of the dendroflora of Lozenska Mountain. Its purpose is to characterize 15 species-edificators of tree and shrub communities in the mountain and to point out the indicators that most determine the assessment of their ability to long-term adaptability to mountain conditions (convertibility). The performed characterization of the edificators with respect to the reference species shows some heterogeneity in the influence of the factors and the distribution of the groups of species. Indicators, which determinate the most convertibility assessments of edificators are cryoclimatic factor, edaphic regimes and soil pH.
{"title":"ECOLOGICAL-PHYTOGEOGRAPHIC CHARACTERISTICS OF THE MAIN EDIFICATORY SPECIES IN THE FORESTS OF LOZENSKA MOUNTAIN","authors":"Plamen Glogov, M. Georgieva","doi":"10.32006/eeep.2020.2.4551","DOIUrl":"https://doi.org/10.32006/eeep.2020.2.4551","url":null,"abstract":"The study covers Phase 2 of the ecological-phytogeographic analysis of the dendroflora of Lozenska Mountain. Its purpose is to characterize 15 species-edificators of tree and shrub communities in the mountain and to point out the indicators that most determine the assessment of their ability to long-term adaptability to mountain conditions (convertibility). The performed characterization of the edificators with respect to the reference species shows some heterogeneity in the influence of the factors and the distribution of the groups of species. Indicators, which determinate the most convertibility assessments of edificators are cryoclimatic factor, edaphic regimes and soil pH.","PeriodicalId":369361,"journal":{"name":"Ecological Engineering and Environment Protection","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121424481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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