Proceedings of the Bulgarian Academy of Sciences最新文献_第7页

On Quasi Maximal Ideals of Commutative Rings 论交换环的准最大图式

Proceedings of the Bulgarian Academy of Sciences Pub Date : 2023-12-21 DOI: 10.7546/crabs.2023.12.01

Murat Alan, Mesut Kılıç, Suat Koç, Ünsal Tekir

引用次数: 0

Determination of 54Mn and 59Fe Specific Activities in Iron Plates Activation Detectors 铁板活化探测器中 54Mn 和 59Fe 比活度的测定

Proceedings of the Bulgarian Academy of Sciences Pub Date : 2023-12-21 DOI: 10.7546/crabs.2023.12.03

Lyuben Dobrev, Mladen Mitev, Dobromir Dimitrov, T. Nonova, Z. Zahariev, Desislava Dimitrova, Srgjan Krstevski, Bozhidar Slavchev

{"title":"Determination of 54Mn and 59Fe Specific Activities in Iron Plates Activation Detectors","authors":"Lyuben Dobrev, Mladen Mitev, Dobromir Dimitrov, T. Nonova, Z. Zahariev, Desislava Dimitrova, Srgjan Krstevski, Bozhidar Slavchev","doi":"10.7546/crabs.2023.12.03","DOIUrl":"https://doi.org/10.7546/crabs.2023.12.03","url":null,"abstract":"In reactor dosimetry it is well known that the empirical determination of the neutron flux is performed by determining the isotope 54Mn generated in a (n, γ) nuclear reaction. This study presents a procedure for the simultaneous determination of the radioisotopes 54Mn and 59Fe, developed to obtain more complete information about the process. The basis of the method is the irradiation of iron-plate detectors with a neutron flux generated in a VVER-type nuclear reactor and subsequent gamma spectrometric analysis of the samples to determine the two radionuclides obtained in two simultaneous (n,x) and (n, γ) nuclear reactions. A very important stage of the assay is the preliminary radiochemical treatment of the samples involving the removal of oxides and corrosion products and the dissolution of the plates in strong mineral acids.\u0000The results show that our approach of simultaneous determination of 54Mn and 59Fe significantly improves the time of analyses, reduces the radiation dose, and increases the accuracy and efficiency of neutron fluence determination. The procedures are relatively easy to perform and are suitable for application in routine studies.","PeriodicalId":104760,"journal":{"name":"Proceedings of the Bulgarian Academy of Sciences","volume":"31 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138948547","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}

引用次数: 0

Detection of OXA-23 Gene in Amoxicillin-Clavulanic Acid-resistant Proteus mirabilis Isolates in Turkey 土耳其耐阿莫西林-克拉维酸变形杆菌中 OXA-23 基因的检测

Proceedings of the Bulgarian Academy of Sciences Pub Date : 2023-12-21 DOI: 10.7546/crabs.2023.12.06

D. Vural, K. Ulker, Y. Çaycı, K. Bilgin, A. Birinci

{"title":"Detection of OXA-23 Gene in Amoxicillin-Clavulanic Acid-resistant Proteus mirabilis Isolates in Turkey","authors":"D. Vural, K. Ulker, Y. Çaycı, K. Bilgin, A. Birinci","doi":"10.7546/crabs.2023.12.06","DOIUrl":"https://doi.org/10.7546/crabs.2023.12.06","url":null,"abstract":"Class D carbapenemases, including OXA-23, OXA24/40, OXA-51, OXA-58, and OXA143, are typically associated with Acinetobacter species; OXA-48-like carbapenemases are usually found in Enterobacterales isolates. Although a few studies on Acinetobacter-type OXA genes in Enterobacterales have been reported, the presence of these Acinetobacter-type OXA genes in these isolates is quite limited. In contrast to other Enterobacterales isolates, studies have identified the presence of genes OXA-23, OXA-24, OXA-51, and OXA-58, which are typically associated with Acinetobacter species, Proteus mirabilis. This study aimed to investigate the presence of carbapenemase genes in amoxicillin-clavulanic acid-resistant P. mirabilis isolates. Thirty-two P. mirabilis isolates isolated from samples sent from intensive care patients and resistant to amoxicillin-clavulanic acid were included in the study. Vitek MS was used for bacterial identification, and the antibiotic resistance profile was determined by the Vitek 2 automated system. The presence of Acinetobacter type OXA genes (OXA-23, OXA-24, OXA-51, and OXA-58) and OXA-48, KPC, NDM, VIM, and IMP genes in P. mirabilis strains were investigated by polymerase chain reaction (PCR) method. In addition, ESBL production was detected in carbapenemase gene-positive isolates. According to the PCR results, while the presence of the OXA23 gene was detected in 15.6% of the isolates, the presence of OXA-24, OXA-51, OXA-58, OXA-48, KPC, NDM, VIM and IMP genes was not detected in any of the isolates. OXA-23, OXA-24, OXA-51, and OXA-58 are common carbapenemases in Acinetobacter species, especially OXA-23 is very common. However, these genes are very rare in Enterobacterales isolates. There are studies in which these genes were identified in P. mirabilis isolates. Similarly, in our research, the OXA-23 gene was detected in P. mirabilis isolates. To our knowledge, this is the first OXA-23 positivity reported in P. mirabilis isolates from our country.","PeriodicalId":104760,"journal":{"name":"Proceedings of the Bulgarian Academy of Sciences","volume":"27 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138950844","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}

引用次数: 0

Harnessing PSO and GA for Congestion Control in High-speed Wireless Sensor Networks 利用 PSO 和 GA 实现高速无线传感器网络的拥塞控制

Proceedings of the Bulgarian Academy of Sciences Pub Date : 2023-12-21 DOI: 10.7546/crabs.2023.12.11

Vidhya Rathinasamy, Poonguzhali Krishnan, Geetha Ponnusamy, Murugananth Raj

引用次数: 0

Seismicity in the Bransfield Strait, Antarctica, for the Period 2020–2023 as Recorded from LIVV Seismic Station LIVV 地震站记录的 2020-2023 年期间南极洲布兰斯菲尔德海峡的地震活动情况

Proceedings of the Bulgarian Academy of Sciences Pub Date : 2023-12-21 DOI: 10.7546/crabs.2023.12.07

V. Buchakchiev, D. Dragomirov, Elitza Pandourska, G. Georgieva, L. Dimitrova

引用次数: 0

Power Efficient Implementation of ECC Using LCSLA Based Dual Field Vedic Multiplier 使用基于 LCSLA 的双字段吠陀乘法器实现高能效 ECC

Proceedings of the Bulgarian Academy of Sciences Pub Date : 2023-12-21 DOI: 10.7546/crabs.2023.12.09

Senthil Sengottaiyan, Vadivel Subramaniam, Yuvaraja Thangavel, Karthick Sekar

引用次数: 0

Evaluation of Push-out Bond Strength of Bioceramic Root Canal Sealers with Different Final Irrigation Protocols 不同最终灌洗方案下生物陶瓷根管封闭器的推出粘接强度评估

Proceedings of the Bulgarian Academy of Sciences Pub Date : 2023-12-21 DOI: 10.7546/crabs.2023.12.15

Bilge Özcan, Burcu Biçer, F. Saklar, Lena Bal

{"title":"Evaluation of Push-out Bond Strength of Bioceramic Root Canal Sealers with Different Final Irrigation Protocols","authors":"Bilge Özcan, Burcu Biçer, F. Saklar, Lena Bal","doi":"10.7546/crabs.2023.12.15","DOIUrl":"https://doi.org/10.7546/crabs.2023.12.15","url":null,"abstract":"This study aims to evaluate the bond strength of bioceramic root canal sealers, with different final irrigation protocols. A total of 104 human upper incisor teeth were selected for applying four different irrigation solutions (Ethylene diamine tetraacetic acid (EDTA), Chlorine Hexidine Gluconate (CHX), Sodium Hypochlorite (NaOCl), and Distilled Water (D.W)) and two root canal sealer protocols (Endosequence BC (BC), Well-Root ST (ST)), in this in vitro study. After root canal treatment specimens were sectioned to three parts (coronal, middle, and apical). Push-out bond strength test was performed in a universal testing machine (Zwick-Roel, Germany) at a crosshead speed of 1 mm/min. Regardless of the irrigation protocol and sealer used, the highest bond strength values were obtained from the apical section ($$p<0.05$$). 5.25% NaOCl + 17% EDTA + 5.25% NaOCl and 2% CHX + 17% EDTA + D.W statistically showed the highest bond strength value and 2% CHX + 17% EDTA + 2% CHX group showed the lowest value in this study ($$p<0.05$$). The bond strength values of Endosequence BC Sealer were statistically higher than the bond strength values of Well Root ST ($$p<0.05$$). According to the final irrigation, Endosequence BC Sealer and Well Root ST root canal sealers showed the highest bonding strength in CHX + EDTA + D.W and NaOCl + EDTA + NaOCl groups.","PeriodicalId":104760,"journal":{"name":"Proceedings of the Bulgarian Academy of Sciences","volume":"58 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138949883","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}

引用次数: 0

The Critical Period for Weed Control in Safflower Fields of Turkey 土耳其红花田杂草控制的关键时期

Proceedings of the Bulgarian Academy of Sciences Pub Date : 2023-12-21 DOI: 10.7546/crabs.2023.12.17

Istem Budak, A. Serim, Ü. Asav

引用次数: 0

Modelling the Distribution of the Little Owl Athene noctua in Bulgaria 保加利亚小鸮 Athene noctua 分布模型

Proceedings of the Bulgarian Academy of Sciences Pub Date : 2023-12-21 DOI: 10.7546/crabs.2023.12.05

Assen Ignatov

{"title":"Modelling the Distribution of the Little Owl Athene noctua in Bulgaria","authors":"Assen Ignatov","doi":"10.7546/crabs.2023.12.05","DOIUrl":"https://doi.org/10.7546/crabs.2023.12.05","url":null,"abstract":"The Little owl Athene noctua (Scopoli 1769) is believed to be widespread in Bulgaria but its actual distribution and ecology are insufficiently studied. Historical records and unpublished information on its abiotic requirements, habitat preferences, breeding biology and distribution were analyzed to generate an Ecological Niche Model and documented that A. noctua is found across 90.8% of Bulgaria. We also estimated its potential distribution and ecological requirements within part of its range using Maxent. The Environmental Niche Model has a high degree of predictability. The climate changes are affecting the distribution. Our results revealed that the vertical distribution of the species expands by 100 m a.s.l. In Bulgaria, the main factors which determine the status of the population are elevation, type of land use, human population density and demographic structure which seem to account for most of the variation in suitable climatic conditions, and climatic factors – Annual Mean Temperature and Mean, Driest Quarter. Threats to the Little owl in Bulgaria include habitat loss, destruction of breeding sites, vehicle collisions, poisoning, predation, and persecution due to negative stereotypes or beliefs. Bulgaria, with a high number of breeding pairs as compared to elsewhere in Europe has an opportunity and obligation to preserve the species. The results of this study will help inform conservation decisions and efforts to maintain Little owl populations in Bulgaria.","PeriodicalId":104760,"journal":{"name":"Proceedings of the Bulgarian Academy of Sciences","volume":"53 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138950904","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}

引用次数: 0

Determination of Some Selected Heavy Metals in Wheat and Pepper Samples Collected from Gaziantep (Türkiye) 加济安泰普（土耳其）采集的小麦和辣椒样品中某些特定重金属的测定

Proceedings of the Bulgarian Academy of Sciences Pub Date : 2023-12-21 DOI: 10.7546/crabs.2023.12.16

K. Mencik, Muhittin Dogan, Mustafa Pehlivan

{"title":"Determination of Some Selected Heavy Metals in Wheat and Pepper Samples Collected from Gaziantep (Türkiye)","authors":"K. Mencik, Muhittin Dogan, Mustafa Pehlivan","doi":"10.7546/crabs.2023.12.16","DOIUrl":"https://doi.org/10.7546/crabs.2023.12.16","url":null,"abstract":"It is very important for the environment and human health to determine the level of accumulation of pollutants in the soil and in the edible parts of plants, especially as a result of the intensive use of chemicals in agricultural activities. For this reason, this study was carried out to determine the heavy metal levels (Cd, Pb, Cr, Ni, Cu, Zn, Mn, Fe and Co) of wheat grain, red pepper and samples of soil from Nurdağı and Islahiye districts where intensive agricultural activities are carried out in Gaziantep (Türkiye). Sampling of agricultural products and their cultivated soils was made at harvest time. The Cd and Pb levels of red pepper and the Cd, Pb and Cr levels of the soil collected from Nurdağı were generally higher than those of FAO/WHO limits. Lead content of wheat grain collected from Nurdağı and Cd and Pb contents of soil samples were also higher than the permissible limits. On the other hand, Cd levels of red pepper and soil samples from Islahiye were higher than those of the FAO/WHO limits. In addition, it was determined that Pb and Cr levels of wheat and Cd and Pb levels of soil samples from Islahiye were generally above permissible limits. On the other hand, in the samples collected from Nurdağı, the highest bioaccumulation factor (BAF) values were calculated for Cd, Cu and Zn in red pepper and for Cu, Zn and Pb in wheat grains. Considering the samples collected from Islahiye, the highest BAF values were calculated in Zn, Cr and Pb for red pepper, and Zn, Cd and Cu for wheat grains. As a result, the concentrations of some heavy metals such as Cd, Pb and Cr were found to be higher than the recommended limits. It was concluded that the reason for this is the intense application of agricultural activities, especially pesticides and inorganic fertilizers, in both districts.","PeriodicalId":104760,"journal":{"name":"Proceedings of the Bulgarian Academy of Sciences","volume":"57 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138952223","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}

引用次数: 0