Article
Chemistry, Multidisciplinary
Chaehun Lim, Cheol Hwan Kwak, Seo Gyeong Jeong, Daesup Kim, Young-Seak Lee
Summary: Nitrogen plasma surface treatment of activated carbon can simultaneously control microporosity and surface functionality, improving CO2 adsorption capacity and selectivity.
Article
Biochemistry & Molecular Biology
Joanna Czwartos, Boguslaw Budner, Andrzej Bartnik, Przemyslaw Wachulak, Beata A. Butruk-Raszeja, Adam Lech, Tomasz Ciach, Henryk Fiedorowicz
Summary: In this study, PEEK surfaces were modified using EUV radiation and two types of plasma treatment. The modified surfaces showed increased roughness, formation of conical structures, changes in chemical composition with appearance of new functional groups, and higher nitrogen and oxygen content. These modifications resulted in improved cell adhesion and cyto-compatibility.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Review
Environmental Sciences
Qi Zhou, Haimeng Sun, Lixia Jia, Weizhong Wu, Jianlong Wang
Summary: This review summarizes the key to improving the water quality of wastewater treatment plants (WWTPs) - simultaneous removal of nitrogen and phosphorus. The composition of secondary effluent from municipal WWTPs is introduced, and three main treatment processes for simultaneous nitrogen and phosphorus removal are summarized. Their performances, mechanisms, influencing factors, and microbial community structures are analyzed. The advanced removal of nitrogen and phosphorus by different technologies is compared and summarized. The challenges and future prospects of simultaneous removal of nitrogen and phosphorus technologies for secondary effluent are proposed.
Article
Optics
V. E. Guseva, A. N. Nechay, A. A. Perekalov, N. N. Salashchenko, N. I. Chkhalo
Summary: This paper discusses the emission spectra and absolute radiation intensities of laser plasma generated by laser pulse on a xenon gas-jet target. The research utilized a Nd:YAG laser with a wavelength of 1064 nm and a pulse duration of 5.2 ns. The spectral range of 3-20 nm was investigated. Gas-jet targets were formed using a supersonic conical nozzle. Emission spectra of the laser plasma were obtained and interpreted, and the absolute radiation intensities were determined for various spectral bands under different gas-jet target excitation conditions.
APPLIED PHYSICS B-LASERS AND OPTICS
(2023)
Article
Chemistry, Applied
Bui Dinh Nhi
Summary: This study successfully achieved a high regeneration efficiency of activated carbon reaching 95.26% by utilizing a combination of microwave radiation and nitrogen ion current. The method holds great environmental significance with regenerated effluent having a COD of 130 mg/l and economic viability due to the ability to regenerate activated carbon multiple times.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2021)
Article
Agricultural Engineering
Tengxia He, Manman Zhang, Mengping Chen, Qifeng Wu, Li Yang, Lu Yang
Summary: The use of a novel strain (Klebsiella oxytoca EN-B2) improved the poor total nitrogen (TN) removal rate achieved when treating wastewater polluted with multiple types of nitrogen using microorganisms. Strain EN-B2 showed rapid elimination of ammonium, nitrate, and nitrite, with maximum elimination rates equivalent to TN elimination rates. The simultaneous nitrification and denitrification system using strain EN-B2 achieved high elimination rates for ammonium, nitrite, and TN. Nitrogen balance calculations revealed significant losses of TN as nitrogenous gases in systems containing only ammonium, nitrite, and nitrate. The enzyme activities of ammonia monooxygenase, hydroxylamine oxidoreductase, nitrate reductase, and nitrite reductase were determined, indicating the suitability of strain EN-B2 for treating wastewater polluted with multiple types of nitrogen.
BIORESOURCE TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Go M. Russell, Takashi Kaneko, Saqura Ishino, Hiroshi Masai, Jun Terao
Summary: A photostable gel that photodegrades only in the presence of an acid has been fabricated, where the cross-linker exhibits softening and swelling under simultaneous treatment with UV-light and acid.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Environmental Sciences
Jun Luo, Yating Jia, Yuancai Chen, Chen Chen, Fernada Leite Lobo, Janine Brandao de Farias Mesquita, Asheesh Kumar Yadav, Shan Huang
Summary: In this study, an SND strain was successfully isolated and identified, which exhibited rapid growth rate and good nitrogen removal performance. The TN removal conditions were optimized using response surface methodology, and the interaction of pH and inoculum size was found to significantly affect total nitrogen removal. Kinetic analyses showed that the reduction of nitrite was the rate-limiting step in the SND process.
Article
Engineering, Environmental
Luo Luo, Yuwen Luo, Ping Qiu, Daihua Jiang, Xuejiao Huang
Summary: Strain M, identified as Agrobacterium tumefaciens M, efficiently and completely removed ammonium and nitrate through assimilation, demonstrating its high nitrogen removal potential.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Taeko Matsukata, Shintaro Ogura, Javier Garcia de Abajo, Takumi Sannomiya
Summary: Free-electron-based spectroscopies can reveal nanoscale optical properties of semiconductor materials and nanophotonic devices. A cathodoluminescence method is demonstrated that can access both excitation and emission spaces at the nanoscale, providing valuable information on previously inaccessible nanoscale optical properties.
Article
Polymer Science
Miklos Berczeli, Zoltan Weltsch
Summary: The study investigated the effects of plasma treatment on the surface properties and bonding strength of High Impact PolyStyrene, exploring the effects of different treatment parameters. The atmospheric pressure of air operation plasma surface treatment can improve the wetting properties of materials, thereby affecting the bonding strength.
Article
Astronomy & Astrophysics
N. Alipour, H. Safari, C. Verbeeck, D. Berghmans, F. Auchere, L. P. Chitta, P. Antolin, K. Barczynski, E. Buchlin, R. Aznar Cuadrado, L. Dolla, M. K. Georgoulis, S. Gissot, L. Harra, A. C. Katsiyannis, D. M. Long, S. Mandal, S. Parenti, O. Podladchikova, E. Petrova, E. Soubrie, U. Schuehle, C. Schwanitz, L. Teriaca, M. J. West, A. N. Zhukov
Summary: This study detects small-scale brightenings, referred to as campfires, using their morphological and intensity structures observed in coronal EUV imaging observations. By applying a method based on Zernike moments and a support vector machine classifier, the researchers are able to automatically identify and track campfires observed by Solar Orbiter/Extreme Ultraviolet Imager (EUI) and Solar Dynamics Observatory (SDO)/Atmospheric Imaging Assembly (AIA). The results show that campfires are often formed at supergranular boundaries and that features with the highest total intensities are generated at network junctions and intense H I Lyman-alpha emission regions observed by EUI /HRILya.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Engineering, Biomedical
Xue Zhou, Ning Yan, Erik J. Cornel, Haidong Cai, Shaobo Xue, Hao Xi, Zhen Fan, Shisheng He, Jianzhong Du
Summary: This bone-targeting polymer vesicle offers a new platform for the real-time diagnosis and therapy of malignant bone tumors, showing excellent imaging capability and high drug delivery efficiency. The vesicle can be self-assembled in water without the need for a cosolvent, and effectively reduces tumor size while inducing tumor cell necrosis and apoptosis.
Article
Agricultural Engineering
Xiangtong Zhou, Liang Zhao, Xiao Wang, Xiaochun Wang, Jing Wei, Zhen Fang, Shanwei Li, Xinshan Rong, Zhijun Luo, Zhishui Liang, Zhidong Dai, Zhiren Wu, Zhigang Liu
Summary: This study reveals that a newly isolated strain, Acinetobacter sp. Z1, is capable of converting both inorganic and organic nitrogen to N-2, with a strong preference for urea. Through optimization of experimental conditions and genome annotation, multiple pathways involved in nitrogen metabolism were identified. This study provides a potential candidate strain for the treatment of urea-containing wastewater using bacteria.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Qian Tang, Mengjie Zeng, Wugui Zou, Wenyu Jiang, Alimu Kahaer, Shixi Liu, Chol Hong, Yuanyao Ye, Wei Jiang, Jianxiong Kang, Yongzheng Ren, Dongqi Liu
Summary: Biological assimilation of nitrogen from wastewater to biomass offers an environmentally friendly solution. This study demonstrates the simultaneous removal and recovery of nitrogen from wastewater by a nitrogen-assimilating Acinetobacter sp. DN1 strain without N2O emission. The mechanism involves direct and indirect pathways for ammonium removal and the conversion of over 70% of the ammonium into intracellular nitrogen-containing compounds. This research provides a new direction for nitrogen removal and recovery without N2O emission.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Inorganic & Nuclear
Lukasz Wegrzynski, Tomasz Fok, Miroslaw Szczurek, Andrzej Bartnik, Przemyslaw Wachulak, Karol Adam Janulewicz, Chul Min Kim
Summary: The advent of very intense, short-pulse lasers has had a profound impact on the field of laser-matter interaction. By studying medium formed by a combination of large and small gas clusters, the specific properties of this medium and its suitability for intense laser-matter interaction have been demonstrated. These large clusters also enable experiments with single-cluster targets.
JOURNAL OF CLUSTER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
T. Fok, K. A. Janulewicz, P. Wachulak, A. Bartnik, B. Nasilowska, J. Kostecki, B. Budner, H. Fiedorowicz, M. Djas, P. Kuzmiuk, K. Lawniczak-Jablonska
Summary: This study investigates the electronic structure of multilayer graphene oxide (GO) paper produced by an improved method. The results show indications of turbostratic stacking after annealing, with NEXAFS spectra resembling the density of states of monocrystalline carbon, suggesting strong graphitisation. Annealing also increases sample amenability to environmental water, supporting claims of room-temperature metastability of multilayer GO.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Review
Cell & Tissue Engineering
Agata Nowak-Stepniowska, Paulina Natalia Osuchowska, Henryk Fiedorowicz, Elzbieta Anna Trafny
Summary: Hypoxia-mimetic agents are new tools used in MSC priming and can replace hypoxia incubators. They can induce a hypoxic state and enhance cell proliferation, differentiation potential, migration potential, and neovascularization. In addition, hypoxia-mimetic agents can increase HIF-1α expression, alter metabolism, and enhance glycolysis. The use of hypoxia-mimetic agents in regenerative medicine is beneficial, especially in pretreating various diseases and promoting cardiac and cartilage regeneration. Understanding MSC priming is critical for evaluating safety procedures and clinical applications.
STEM CELLS INTERNATIONAL
(2022)
Review
Chemistry, Multidisciplinary
Agata Nowak-Stepniowska, Wiktoria Kasprzycka, Paulina Natalia Osuchowska, Elzbieta Anna Trafny, Andrzej Bartnik, Henryk Fiedorowicz, Przemyslaw Wachulak
Summary: Soft X-ray contact microscopy (SXCM) is a technique that allows imaging of intact, living cells with nanometer resolution. Currently, it is mainly used on synchrotrons with restricted access, limiting its practical application. A compact, desk-top SXCM laboratory setup would facilitate the work of biologists.
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Fluids & Plasmas
Andrzej Bartnik, Karol Jach, Robert Swierczynski, Mateusz Majszyk, Tomasz Fok, Lukasz Wegrzynski, Przemyslaw Wachulak, Henryk Fiedorowicz
Summary: In this work, the time evolution of plasmas generated by the interaction of laser pulses with nitrogen gas was investigated. High-temperature plasmas produced by the laser pulses were found to be a source of soft x-rays and charged particles, which ionized and excited the surrounding gas, leading to the formation of low-temperature plasmas. The formation of low-temperature plasmas was found to be dominated by ion streams or soft x-ray radiation, depending on the distance from the focal spot.
PHYSICS OF PLASMAS
(2022)
Article
Spectroscopy
Lukasz Gutowski, Malwina Liszewska, Bartosz Bartosewicz, Boguslaw Budner, Jan L. Weyher, Bartlomiej J. Jankiewicz
Summary: This study investigates the reactions between organic monoradicals and methanol using surface-enhanced Raman spectroscopy (SERS) and self-assembled monolayer (SAM) approaches. Monoradicals are generated from thiophenols and phenylmethanethiols substituted with bromine, iodine, and nitro groups by UV irradiation. The efficiency of monoradical generation is found to be highly dependent on the chemical structure of the precursor, and both the SERS substrate and experimental conditions strongly influence the obtained results.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Physical
Joanna Czwartos, Angelika Zaszczynska, Agata Nowak-Stepniowska, Tomasz Fok, Boguslaw Budner, Andrzej Bartnik, Przemyslaw Wachulak, Dorota Kolbuk, Pawel Sajkiewicz, Henryk Fiedorowicz
Summary: In this study, a novel method of physicochemical modification and bioactivity enhancement of electrospun fibrous polycaprolactone (PCL) nanofibers using soft X-ray/extreme ultraviolet (SXR/EUV) irradiation and low-temperature plasma treatment was reported. The modified PCL nanofibers showed cyto-compatible and non-cytotoxic properties, as well as enhanced cell adhesion and proliferation.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Boguslaw Budner, Wojciech Tokarz, Slawomir Dyjak, Andrzej Czerwinski, Bartosz Bartosewicz, Bartlomiej Jankiewicz
Summary: The research aimed to develop an efficient Pt-based catalyst for PEMFCs by directly depositing PtNPs on carbon supports from the platinum target using a cost-effective and efficient physical method. The Pt deposition was achieved at room temperature using a pulsed laser deposition system equipped with an ArF excimer laser. The specially designed electromechanical system ensured uniform deposition of PtNPs on carbon supports. The best electrochemical performance was observed for Pt deposited on Vulcan XC-72R carbon black powder, with a peak power density of 0.41 W/cm2 in a H-2/Air fed PEMFC, which achieved a higher catalyst utilization factor compared to the commercial catalyst.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Aleksandra M. M. Figat, Bartosz Bartosewicz, Malwina Liszewska, Boguslaw Budner, Malgorzata Norek, Bartlomiej J. Jankiewicz
Summary: This study investigates the use of amino acids as reducing and capping agents in the synthesis of gold nanoparticles. Only four out of the twenty-one investigated amino acids were unable to produce gold nanoparticles. The physicochemical characteristics of the synthesized nanoparticles varied with the amino acid used for the reduction.
Article
Nanoscience & Nanotechnology
Magdalena A. Zajac, Boguslaw Budner, Malwina Liszewska, Bartosz Bartosewicz, Lukasz Gutowski, Jan L. Weyher, Bartlomiej J. Jankiewicz
Summary: The results of comparative studies on PLD and MS fabricated GaN/Ag substrates for SERS are reported. The SERS properties of the substrates were evaluated by measuring the SERS spectra of 4-mercaptobenzoic acid molecules adsorbed on them. The PLD-made GaN/Ag substrate exhibited approximately 4.4 times higher enhancement factor than the best MS-made substrate.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2023)
Article
Chemistry, Physical
Damian Makowski, Wojciech Lisowski, Mateusz A. Baluk, Tomasz Klimczuk, Beata Bajorowicz
Summary: Hybrid materials based on graphitic carbon nitride (g-C3N4) and NTU-9 metal-organic frameworks (MOF) were prepared and showed improved photocatalytic performance for the degradation of toluene under LED visible-light irradiation.
Article
Engineering, Electrical & Electronic
Jacek Boguski, Jaroslaw Wrobel, Sebastian Zlotnik, Boguslaw Budner, Malwina Liszewska, Lukasz Kubiszyn, Pawel P. Michalowski, Lukasz Ciura, Pawel Moszczynski, Sebastian Odrzywolski, Bartlomiej Jankiewicz, Jerzy Wrobel
Summary: The article presents the results of diameter mapping for circular-symmetric disturbance of epitaxially grown InAs (100) layers on GaAs substrates. The impact of Be doping on the quality of 2-inch InAs-on-GaAs wafers was evaluated using a set of acceptors doped InAs epilayers. Optical techniques showed a significant difference in average roughness between the center and outer part of the wafer. However, no volumetric differences were detected using Raman spectroscopy and high-resolution X-ray diffraction. A correlation between Be doping level and the surface area of circular defect patterns was found.
OPTO-ELECTRONICS REVIEW
(2023)
