Nukleonika最新文献_第3页

The International Conference on Development and Applications of Nuclear Technologies, NUTECH-2020, Warsaw, Poland, 4–7 October 2020 国际核技术发展与应用会议，NUTECH-2020，波兰华沙，2020年10月4日至7日

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2021-11-25 DOI: 10.2478/nuka-2021-0016

Dagmara Chmielewska-Śmietanko, U. Gryczka

引用次数: 0

Radiation synthesis of poly(acrylic acid) nanogels for drug delivery applications – post-synthesis product colloidal stability 用于药物递送应用的聚（丙烯酸）纳米凝胶的辐射合成——合成后产物的胶体稳定性

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2021-11-25 DOI: 10.2478/nuka-2021-0026

B. P. Rurarz, Natalia Gibka, Małgorzata Bukowczyk, S. Kadłubowski, P. Ulański

{"title":"Radiation synthesis of poly(acrylic acid) nanogels for drug delivery applications – post-synthesis product colloidal stability","authors":"B. P. Rurarz, Natalia Gibka, Małgorzata Bukowczyk, S. Kadłubowski, P. Ulański","doi":"10.2478/nuka-2021-0026","DOIUrl":"https://doi.org/10.2478/nuka-2021-0026","url":null,"abstract":"Abstract Synthesis of polymer nanogels (NGs) for biomedical applications is considered to be a very promising application in radiation engineering. Under high-dose pulse irradiation of dilute aqueous polymer solution, reactive species generated by water radiolysis can create multiple radicals on each macromolecule and consequently induce intramolecular cross-linking of polymer chains, resulting in NG formation. The obtained products are free from harmful monomers, initiators, and cross-linking agents, which makes them potentially applicable for drug delivery applications. One of the biggest challenges in handling and use of nanoparticles, however, is the colloidal stability, when aqueous suspensions are stored for prolonged periods. Therefore, development of the best protocols for the particular nanocarrier storage is key. To address this need, we have performed the prospective study in which we systematically assessed the influence of various processing and storage scenarios feasible in our lab, on the colloidal stability of the radiation-synthesized poly(acrylic acid) (PAA) NG particles in suspension. This allowed us to choose the optimal way of handling the product after its synthesis. We confirmed that none of the strategies we used and tested are substantially detrimental to our product. Filtration with 0.2-μm filters was proven sufficient for sample purification and prolonged storage in aqueous suspension did not exert a negative effect on the colloidal stability of particles suspension. We have also demonstrated that lyoprotectant-free lyophilization was suitable for our polymer nanoparticles. This is an important fact for further application of particles as nanocarriers for biologically active compounds such as targeting ligands or therapeutic moieties.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"66 1","pages":"179 - 186"},"PeriodicalIF":0.7,"publicationDate":"2021-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49414975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Sub-cellular elemental imaging of human muscle tissues affected by neuromuscular diseases 受神经肌肉疾病影响的人体肌肉组织亚细胞元素成像

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2021-11-25 DOI: 10.2478/nuka-2021-0024

Patrycja Śliż-Szpytma, M. Lankosz, J. Dudała, D. Adamek, E. Radwańska, B. Kwinta, M. Jakšić, I. Božičević Mihalić, G. Provatas

引用次数: 0

Sorption of selected radionuclides from liquid radioactive waste by sorbents of biological origin: The alkaline earth alginates 生物源吸附剂从液体放射性废物中吸附选定的放射性核素：碱土褐藻酸盐

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2021-11-25 DOI: 10.2478/nuka-2021-0023

L. Fuks, Agata Oszczak-Nowińska

引用次数: 2

Plasma technology to remove NOx from off-gases 等离子体技术去除废气中的氮氧化物

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2021-11-25 DOI: 10.2478/nuka-2021-0033

A. Pawelec, A. Chmielewski, Yongxia Sun, S. Bułka, T. Torims, G. Pikurs, G. Mattausch

{"title":"Plasma technology to remove NOx from off-gases","authors":"A. Pawelec, A. Chmielewski, Yongxia Sun, S. Bułka, T. Torims, G. Pikurs, G. Mattausch","doi":"10.2478/nuka-2021-0033","DOIUrl":"https://doi.org/10.2478/nuka-2021-0033","url":null,"abstract":"Abstract Operation of marine diesel engines causes significant emission of sulphur and nitrogen oxides. It was noticed worldwide and the regulations concerning harmful emissions were introduced. There were several solutions elaborated; however, emission control for both SOx and NOx requires two distinctive processes realized in separated devices, which is problematic due to limited space on ship board and high overall costs. Therefore, the electron beam flue gas treatment (EBFGT) process was adopted to ensure the abatement of the problem of marine diesel off-gases. This novel solution combines two main processes: first the flue gas is irradiated with electron beam where NO and SO2 are oxidized; the second stage is wet scrubbing to remove both pollutants with high efficiency. Laboratory tests showed that this process could be effectively applied to remove SO2 and NOx from diesel engine off-gases. Different compositions of absorbing solution with three different oxidants (NaClO, NaClO2 and NaClO3) were tested. The highest NOx removal efficiency (>96%) was obtained when seawater-NaClO2-NaOH was used as scrubber solution at 10.9 kGy dose. The process was further tested in real maritime conditions at Riga shipyard, Latvia. More than 45% NOx was removed at a 5.5 kGy dose, corresponding to 4800 Nm3/h off-gases arising from ship emission. The operation of the plant was the first case of examination of the hybrid electron beam technology in real conditions. Taking into account the experiment conditions, good agreement was obtained with laboratory tests. The results obtained in Riga shipyard provided valuable information for the application of this technology for control of large cargo ship emission.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"66 1","pages":"227 - 231"},"PeriodicalIF":0.7,"publicationDate":"2021-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45401514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Preliminary computational and experimental design studies of the ISHTAR thermostatic rig for the high-temperature reactors materials irradiation 高温反应堆材料辐照用ISHTAR恒温装置的初步计算和实验设计研究

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2021-11-25 DOI: 10.2478/nuka-2021-0019

A. Talarowska, M. Lipka, G. Wojtania

{"title":"Preliminary computational and experimental design studies of the ISHTAR thermostatic rig for the high-temperature reactors materials irradiation","authors":"A. Talarowska, M. Lipka, G. Wojtania","doi":"10.2478/nuka-2021-0019","DOIUrl":"https://doi.org/10.2478/nuka-2021-0019","url":null,"abstract":"Abstract The Irradiation System for High-Temperature Reactors (ISHTAR) thermostatic rig will be used to irradiate advanced core material samples in conditions corresponding to those prevailing in the high-temperature reactors (HTRs): these conditions include a stable temperature extending up to 1000°C in the helium atmosphere. Computational and experimental studies concerning the design have been conducted, proving the possibility of these conditions’ fulfillment inside the rig while maintaining the safety limits for MARIA research reactor. The outcome is the thermostatic rig design that will be implemented in the MARIA reactor. Appropriate irradiation temperature will be achieved by a combination of electric heating with the control system, gamma heating, and a helium insulation gap with precisely designed thickness. The ISHTAR rig will be placed inside the vertical irradiation channel, which is located in the reactor pool. The device is being developed from scratch at the Nuclear Facilities Operation Department of the National Centre for Nuclear Research as a part of the GOSPOSTRATEG programme.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"66 1","pages":"127 - 132"},"PeriodicalIF":0.7,"publicationDate":"2021-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47438110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Studies on uranium recovery from a U-bearing Radoniów Dump 某含铀排土场Radoniów铀回收研究

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2021-11-25 DOI: 10.2478/nuka-2021-0017

Katarzyna Kiegiel, O. Roubinek, D. Gajda, P. Kalbarczyk, Grażyna Zakrzewska-Kołtuniewicz, A. Chmielewski

引用次数: 0

Effect of gamma irradiation on microbiological and nutritional properties of the freeze-dried berries γ辐照对冻干浆果微生物和营养特性的影响

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2021-11-25 DOI: 10.2478/nuka-2021-0032

S. Mašić, Ivica Vujčić

{"title":"Effect of gamma irradiation on microbiological and nutritional properties of the freeze-dried berries","authors":"S. Mašić, Ivica Vujčić","doi":"10.2478/nuka-2021-0032","DOIUrl":"https://doi.org/10.2478/nuka-2021-0032","url":null,"abstract":"Abstract Lyophilization or freeze-drying is the technique of removing ice or other frozen solvents from a material through sublimation and the removal of bound water molecules through the process of desorption. Drying occurs in an absolute vacuum at temperatures from −40°C to −50°C. This technique is often used for the conservation of fruits, especially berries. During this process, the water changes from frozen to gaseous, with no thawing. Due to low temperatures and the high vacuum, most microorganisms are rendered inactive during the lyophilization process. However, if there is a necessity to destroy all microorganisms from treated food, subsequent irradiation with gamma rays is an appropriate method. This paper investigated the influence of different doses of gamma radiation on lyophilized berries’ microbiological characteristics. It was shown that the radiation dose of 7 kGy is sufficient to eliminate the total number of microorganisms (excluding molds) to the extent that the number falls below the permitted limit according t o the law on the microbiological safety of foodstuffs of the Republic of Serbia, and 5 kGy is enough for molds to be rendered inactive. It was also concluded that gamma irradiation does not affect the nutritional value of lyophilized berries.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"66 1","pages":"221 - 225"},"PeriodicalIF":0.7,"publicationDate":"2021-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48098215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Combination of methods of thermal and radiation treatment of sediments associated with PCBs – the Delor type 与多氯联苯有关的沉积物的热和辐射处理方法的组合- Delor类型

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2021-11-25 DOI: 10.2478/nuka-2021-0030

M. Fülöp, A. Šagátová, I. Benkovský, K. Prokeš, Ľubica Foltínová

引用次数: 0

Organic pollutant removal from marine diesel engine off-gases under electron beam and hybrid electron beam and wet scrubbing process 电子束和混合电子束湿式洗涤法去除船用柴油机尾气中的有机污染物

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2021-11-25 DOI: 10.2478/nuka-2021-0028

Yongxia Sun, A. Chmielewski, A. Pawelec, G. Mattausch, T. Torims

{"title":"Organic pollutant removal from marine diesel engine off-gases under electron beam and hybrid electron beam and wet scrubbing process","authors":"Yongxia Sun, A. Chmielewski, A. Pawelec, G. Mattausch, T. Torims","doi":"10.2478/nuka-2021-0028","DOIUrl":"https://doi.org/10.2478/nuka-2021-0028","url":null,"abstract":"Abstract The removal of organic pollutants from ship emission was studied using two processes namely electron beam (EB) and hybrid EB with wet scrubbing process. A mobile accelerator unit was used to treat 4915 Nm3/h of flue gas emitted from a tugboat in Riga Shipyard. A volume of 3 m3 seawater containing 36.8 mM of NaClO2 oxidant was used as a wet scrubber solution. Organic pollutants, mainly volatile organic pollutants (VOCs), were collected at three different sampling points, before and after irradiation vessels, and after wet-scrubber unit, respectively. They were collected with glass sampling bottles, tedlar bags, Coconut Shell Charcoal (CSC) sorbents and XAD-2 sorbents. CH3OH and CH3OH/CH2Cl2 (1:1) were used to extract VOCs from CSC and XAD-2 sorbents, respectively. Syringe filters were used to obtain the solid-free extraction solutions. They were concentrated using a micro-extractor under continuously blowing high-purity Ar. A gas chromatography–mass spectrometry (GC-MS) was used for analysis. The identified organic compounds were: aliphatic hydrocarbons (dodecane C12H26 to eicosane C20H42), aromatic hydrocarbon (toluene), esters (C3H7COOCH3, (C4H9OCO)2C6H4), nitro compounds (C3H5NO3, C4H7NO2) and acid (C7H15COOH). After 4.2 kGy EB irradiation, around 50–100% aliphatic hydrocarbons, 83% toluene and 7.5% (C4H9OCO)2C6H4 were removed from the off-gases, and after EB hybrid wet-scrubber process, most organic compounds including nitro compounds were removed. Only trace amount of toluene, hexadecane, octadecane and dibutyl phthalate were found to be present in the gas phase.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"66 1","pages":"193 - 199"},"PeriodicalIF":0.7,"publicationDate":"2021-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46346821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1