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Photoluminescence and energy transfer in transparent glass-ceramics based on GdF3:RE3+（RE=Tb,Eu）nanocrystals

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Journal of Rare Earths 2019年第11期37卷 1137-1144页

作者： Natalia Pawlik Barbara Szpikowska-Sroka Ewa Pietrasik Tomasz Goryczka wojciech A.Pisarski Institute of Chemistry University of Silesia9 Szkolna StreetKatowice 40-007Poland Institute of Materials Science University of Silesia75 Putku Piechoty 1A StreetChorzow 41-500Poland

In the present work,the transparent oxyfluoride glass-ceramic samples containing GdF3:RE^3+(RE=Tb,Eu)nanocrystals(nGCs)were fabricated via controlled heat-treatment of precursor xerogels prepared using a sol-gel *** formation of GdF3 nanocrystalline phase from gadolinium(III)trifluoroacetate was verified based on XRD *** average crystal sizes calculated from Scherrer formula were estimated to^10 nm as well as^6 nm for Tb^3+-and Eu^3+-doped samples,*** optical behavior of prepared sol-gel samples was evaluated based on photoluminescence excitation(PLE)and emission spectra(PL)as well as luminescence decay *** samples exhibit the 5D4→7FJ(J=6-3,Tb3+)and the 5D0→7FJ(J=0-4,Eu3+)emission bands recorded within the visible spectral area under excitation at near-UV(393 nm(Eu^3+),351,369,378 nm(Tb^3+))as well as middle-UV illumination(273 nm(Gd3+)).Additionally,based on recorded decay curves,the luminescence lifetimes(τm)for the 5D4(Tb^3+)and the 5D0(Eu3+)excited states were also *** general,recorded luminescence spectra and double-exponential character of decay curves for nGCs indicate a successful migration of Tb^3+and Eu^3+dopant ions from amorphous silicate framework to lowphonon energy GdF3 nanocrystal phase.

关键词： Sol-gel method GdF3 nanocrystals Terbium Europium Rare earths

Gastroenterostoma after Billroth antrectomy as a premalignant condition

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World Journal of Gastroenterology 2012年第25期18卷 3201-3206页

作者： Robert Sitarz Ryszard Maciejewski wojciech P Polkowski G Johan A Offerhaus Department of Pathology University Medical CentreUtrecht3584 CX UtrechtThe Netherlands Department of Human Anatomy Medical University of Lublin20-950 LublinPoland Department of Surgical Oncology Medical University of Lublin20-081 LublinPoland Department of Pathology Academic Medical Centre 1105 AZ Amsterdam The Netherlands

Gastric stump carcinoma(GSC) following remote gastric surgery is widely recognized as a separate entity within the group of various types of gastric *** is a well established risk factor for the development of GSC at a long time after the initial *** exoas well as endogenous factors appear to be involved in the etiopathogenesis of GSC,such as achlorhydria,hypergastrinemia and biliary reflux,Epstein-Barr virus and Helicobacter pylori infection,atrophic gastritis,and also some polymorphisms in interleukin-1 and maybe *** review summarizes the literature of GSC,with special reference to reliable early *** particular,dysplasia can be considered as a dependable morphological ***,close endoscopic surveillance with multiple biopsies of the gastroenterostomy is *** starting at 15 years after the initial ulcer surgery can detect tumors at a curable *** approach can be ofspecial interest in Eastern European countries,where surgery for benign gastroduodenal ulcers has remained a practice for a much longer time than in Western Europe,and therefore GSC is found with higher frequency.

关键词： Epstein-Barr病毒胃癌十二指肠溃疡手术治疗状态幽门螺旋杆菌 GSC 白细胞介素

Polarization effect in tip-enhanced infrared nanospect- roscopy studies of the selective Y5 receptor antagonist Lu AA33810

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Nano Research 2018年第8期11卷 4401-4411页

作者： Natalia Piergies Ewa Pinta Czestawa Paluszkiewicz Helena Domin wojciech M.Kwiatek Institute of Nuclear Physics Polish Academy of Sciences PL-31342 Krakow Poland Institute of Pharmacology Polish Academy of Sciences Department of Neurobiology 31-343 Krakow Smetna Street 12 Poland Natalia Piergies and Ewa Pieta contributed equally to this work.

A novel approach of combining conventional infrared spectroscopy （IR） and atomic force microscopy （AFM） is presented to better understand the behavior of a drug adsorbed on a metal substrate at the nanoscale level. Tip-enhanced infrared nanospectroscopy （TEIRA） was used for the first time to investigate Lu AA33810, a selective brain-penetrating Y5 receptor antagonist, after immobilization on gold nanopartides （GNPs）. Here, a gold coated AFM tip and gold substrate were used to obtain the near-field electromagnetic field trapping effect. Because of the huge signal enhancement, it was possible to obtain the spectral information regarding the self-assembled monolayer of the investigated molecule. The effect of two orthogonal polarizations （p- and s-polarization modulations） of the excitation laser beam on the spectral patterns is also discussed. The results show that there is a strong relationship between the state of polarization of the incident radiation and the relative infrared band intensities. Another factor affecting the observed spectral differences is the topology of the metal substrate, which may result in the induction of a cross-polarization effect. The performed analysis indicates that the C--C bond from the cyclohexyl group is oriented almost parallel to the metal surface. Conversely, the p- and s-polarized spectral variations suggest that the O=S---O angle is high enough to enable the simultaneous interaction of both oxygen atoms with the GNPs.

关键词： tip-enhanced infrared nanospectroscopy polarization modulation Y5 receptor antagonist gold nanoparticles adsorption

Mycobiota of the disused ore mine of Marcinków inSnieznik Masiff(western Poland)

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Journal of Mountain Science 2017年第12期14卷 2448-2457页

作者： wojciech pusz anna baturo-ciesniewska pawel zagozdzon rafal ogórek wroclaw university of environmental and life sciences department of plant protectionplant pathology and mycology divisionGrunwaldzki Sq.24a50-363 WroclawPoland university of science and technology faculty of agriculture and biotechnologydepartment of molecular phytopathologyKordecISego St.20.85-225 B dgoszezPolan wroclaw university of science and technology faculty of geoengineeringmining and geologyNa Grobli St.1550-42.1 Wroclaw Poland department of genetics institute of genetics and microbiologyuniversity of wroclawPrzybyszewskiego St.63/7751—148 Wroclaw.Poland

Marcinków(Lower Silesia, ?nie?nik Masiff,south-western Poland) has been a well-known mining centre since the mid-15 th century. Mineral extraction ended in 1949 with the ores of Pb, Ag, Cu and occasionally Au, U or graphite mined there. The mine is surrounded by metamorphic graphite and mica schist. It is not open to the public and no bats have been recorded living in. The aim of this study was the mycological analysis of the air, the rock surface and the water of the disused ore mine of Marcinkó***, the chemical composition of rocks and water, and microclimate conditions of the adit were determined. Fungi were identified using a combination of phenotypic and molecular *** taxa of fungi were cultured from the indoor air samples of the adit, whereas the outdoor air samples contained only five taxa. On the other hand, nine taxa were isolated from both the rocky walls and the *** Aspergillus group was present only on the rocks and in the water, whereas Cladosporium herbarum,Dumontinia tuberosa, Epicoccum nigrum, Hirsutella sp., were found exclusively in the air. The mycobiota found in the ore mine were mostly similar to those recorded in other mines and natural caves. However,it should be noted that the internal microclimate and chemical compounds of the rocks.

关键词： Ore mine Sulphur condition Fungi Speleomycology Marcinków

Structure and corrosion resistance of Al–Cu–Fe alloys

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Progress in Natural Science:Materials International 2020年第3期30卷 393-401页

作者： Rafa? Babilas Anna Bajorek Monika Spilka Adrian Radoń wojciech ?oński Department of Engineering Materials and Biomaterials Silesian University of Technology Institute of Physics University of Silesia in Katowice ?ukasiewicz Research Network-Institute of Non-Ferrous Metals

The microstructure and electrochemical properties of Al–Cu–Fe alloys with the atomic compositions of Al65Cu20Fe15,Al78Cu7Fe15and Al80Cu5Fe14Si1have been *** alloys were produced by induction melting of pure elements with copper mold *** microstructure of the alloys was analyzed by X-ray diffraction and high-resolution transmission electron *** formation of quasicrystalline phases in the Al–Cu–Fe alloys was *** presence of intermetallic phases was observed in the alloys after crystallization in a form of ingots and *** electrochemical measurements were conducted in 3.5%NaCl *** electronic structure of the alloys was determined by X-ray photoelectron *** post corrosion surface of the samples was checked using a scanning electron microscope equipped with the energydispersive X-ray *** was observed that the Al65Cu20Fe15alloy had the highest corrosion *** improved corrosion resistance parameters were noted for the plate samples rather than those in the as-cast *** the hardness of the Al65Cu20Fe15alloy was significantly higher than the other alloy samples.

关键词： Al-Cu-Fe alloys Copper mold casting X-ray diffraction High-resolution transmission electron microscopy X-ray photon spectroscopy Electrochemical impedance spectroscopy

Blood concentration of aminothiols in children with relapse of nephrotic syndrome

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世界儿科杂志:英文版 2016年第3期12卷 353-359页

作者： Marcin Tkaczyk Monika Miklaszewska Jolanta Lukamowicz wojciech Fendler Division of Nephrology Polish Mother's Memorial Hospital Research Institute of lodz281/289 Rzgowska st.93-338lodzPoland Department of Pediatric Nephrology Collegium Medicum of Jagiellonian UniversityWielicka 26530-663 KrakowPoland Center of Medical Diagnostics Polish Mother's Memorial Hospital Research Institute of lodzPoland281/289 Rzgowska st.93-338 lodzPoland Medical University of lodz al.Kosciuszki 4lodzPoland

Background:The role of idiopathic nephrotic syndrome(INS)in the pathogenesis of atherosclerosis in childhood has not been clearly ***,antioxidative defense in INS is thought to be *** study aimed to assess the changes of plasma concentration of selected aminothiols in the blood of children with INS at various stages of the ***:This cross-sectional study was conducted in 125 children aged 2-18 *** children were divided into 4 groups:group A,early relapse(n=37);group B,early remission for 4-6 weeks from the onset(n=37);group C,late steroid-free remission(n=31);and group D,long-term remission for 2-5 years(n=20).Control group(E)consisted of 30 age-and gender-matched healthy *** study protocol comprised an analysis of plasma concentrations of glutathione,homocysteine,cysteine and cysteinylglycine by high-performance liquid *** of protein-bound and free aminothiols were *** injury was assessed by thrombomodulin,PAI-1 concentration,and von willebrand factor ***:The children with INS had unbalanced aminothiol metabolism only in relapse and early remission,that shifted towards increased oxidative *** of cyclosporine A caused a significant increase in homocysteine and cysteine *** in aminothiol metabolism were significantly related to endothelial ***:The fi ndings of this study may be helpful in elucidating the pathogenesis of premature atherosclerosis in patients with INS refractory to the treatment or in the case of frequent relapse.

关键词： aminothiols children cyclosporine A homocysteine nephrotic syndrome

Magnesium implant degradation provides immunomodulatory and proangiogenic effects and attenuates peri-implant fibrosis in soft tissues

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Bioactive Materials 2023年第8期26卷 353-369页

作者： Heithem Ben Amara Diana C.Martinez Furqan A.Shah Anna Johansson Loo Lena Emanuelsson Birgitta Norlindh Regine willumeit-Römer Tomasz Plocinski wojciech Swieszkowski Anders Palmquist Omar Omar Peter Thomsen Department of Biomaterials Institute of Clinical SciencesSahlgrenska AcademyUniversity of GothenburgGothenburgSweden Biomaterials Group Materials Design DivisionFaculty of Materials Science and EngineeringWarsaw University of TechnologyWarsawPoland Institute of Metallic Biomaterials Helmholtz-Zentrum HereonGeesthachtGermany

Implants made of magnesium(Mg)are increasingly employed in patients to achieve osteosynthesis while degrading in *** Mg implants and Mg^(2+)have been suggested to possess anti-inflammatory properties,the clinically observed soft tissue inflammation around Mg implants is ***,using a rat soft tissue model and a 1-28 d observation period,we determined the temporo-spatial cell distribution and behavior in relation to sequential changes of pure Mg implant surface properties and Mg^(2+)*** to nondegradable titanium(Ti)implants,Mg degradation exacerbated initial *** of Mg degradation products at the tissue-implant interface,culminating at 3 d,actively initiated chemotaxis and upregulated mRNA and protein immunomodulatory markers,particularly inducible nitric oxide synthase and toll-like receptor-4 up to 6 d,yet without a cytotoxic *** vascularization was demonstrated morphologically,preceded by high expression of vascular endothelial growth *** transition to appropriate tissue repair coincided with implant surface enrichment of Ca and P and reduced peri-implant Mg^(2+)*** implants revealed a thinner fibrous encapsulation compared with *** detailed understanding of the relationship between Mg material properties and the spatial and time-resolved cellular processes provides a basis for the interpretation of clinical observations and future tailoring of Mg implants.

关键词： Magnesium Biodegradable implants Inflammation Foreign-body reaction Gene expression Neovascularization

Comparison of methods for vibration analysis of electrostatic precipitators

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Acta Mechanica Sinica 2011年第1期27卷 72-79页

作者： Iwona Adamiec-Wójcik Andrzej Nowak Stanisaw wojciech Department of Applied Computer Science University of Bielsko-Biaa

The paper presents two methods for the formulation of free vibration analysis of collecting electrodes of *** first,called the hybrid finite element method, combines the finit element method used for calculations of spring deformations with the rigid finite element method used to reflect mass and geometrical features,which is called the hybrid finite element *** a result,a model with a diagonal mass matrix is *** to a specific geometry of the electrodes,which are long plates of complicated shapes,the second method proposed is the strip method which is a semi-analytical *** strip method allows us to formulate the equations of motion with a considerably smaller number of generalized *** of numerical calculations obtained by both methods are compared with those obtained using commercial software like ANSYS and *** compatibility of results is achieved.

关键词： Finite element method · Rigid finite element method · Strip method · Free vibration analysis · Electrostatic precipitators

Metabolic regulation of immune responses to cancer

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Cancer Biology & Medicine 2022年第11期19卷 1528-1542页

作者： Jannis wiBfeld Anke Werner Xin Yan Nora ten Bosch Guoliang Cui Helmholtz Institute for Translational Oncology(HI-TRON) Mainz 55131Germany T Cell Metabolism Group(D192) German Cancer Research Center(DKFZ)Heidelberg 69120Germany Faculty of Biosciences Heidelberg UniversityHeidelberg 69120Germany

The tumor microenvironment is an ecosystem composed of multiple types of cells, such as tumor cells, immune cells, and cancerassociated fibroblasts. Cancer cells grow faster than non-cancerous cells and consume larger amounts of nutrients. The rapid growth characteristic of cancer cells fundamentally alters nutrient availability in the tumor microenvironment and results in reprogramming of immune cell metabolic pathways. Accumulating evidence suggests that cellular metabolism of nutrients, such as lipids and amino acids, beyond being essential to meet the bioenergetic and biosynthetic demands of immune cells, also regulates a broad spectrum of cellular signal transduction, and influences immune cell survival, differentiation, and anti-tumor effector function. The cancer immunometabolism research field is rapidly evolving, and exciting new discoveries are reported in high-profile journals nearly weekly. Therefore, all new findings in this field cannot be summarized within this short review. Instead, this review is intended to provide a brief introduction to this rapidly developing research field, with a focus on the metabolism of two classes of important nutrients-lipids and amino acids-in immune cells. We highlight recent research on the roles of lipids and amino acids in regulating the metabolic fitness and immunological functions of T cells, macrophages, and natural killer cells in the tumor microenvironment. Furthermore, we discuss the possibility of “editing” metabolic pathways in immune cells to act synergistically with currently available immunotherapies in enhancing anti-tumor immune responses.

关键词： Lipids amino acids cancer anti-tumor immunity T cells NK cells metabolism immunometabolism