Roman J. Jędrzejczyk

Jagiellonian University | UJ · Malopolska Center o Biotechnology

The aim of presented study was to test nutritional properties of potato tubers and silver ions accumulation pattern after foliar application of silver nanoparticles (AgNPs) during potato vegetation. Potato plants were sprayed with different concentration of Ag nanoparticles (0.1, 1.0 and 10 mg·dm⁻³) synthesized with incorporation with sodium dodecy...

Study question Does in vitro culture (IVC) induce changes in lipid profile of the embryo? Summary answer IVC induces changes in embryonic lipid homeostasis that subsequently affect placenta-brain axis (PBA) function and are then maintained in the brain of adult mice. What is known already During ART, embryos are exposed to oxidative stress (OS)-p...

The effectiveness of silver nanoparticles, addressing different methods of their synthesis, with regard both to accumulation of Ag ions and the nutritional properties of potato tubers in field potato cultivation was the aim of presented study. Potato plants were sprayed with different concentration of Ag nanoparticles (0.1, 1.0 and 10 mg·dm − 3 ) s...

The growing number of acute drug abuse overdoses demands the development of innovative detoxification strategies for emergency purposes. In this study, an innovative approach for the application of porous Zr-based metal–organic frameworks for the treatment of acute overdoses of popular drugs of abuse including amphetamine, methamphetamine, cocaine,...

The mechanism of ethylene (ET)-regulated salinity stress response remains largely unexplained, especially for semi-halophytes and halophytes. Here, we present the results of the multifaceted analysis of the model semi-halophyte Mesembryanthemum crystallinum L. (common ice plant) ET biosynthesis pathway key components' response to prolonged (14 days...

Intensive crop production leads to the disruption of the symbiosis between plants and their associated microorganisms, resulting in suboptimal plant productivity and lower yield quality. Therefore, it is necessary to improve existing methods and explore modern, environmentally friendly approaches to crop production. One of these methods is biotizat...

Modern agriculture requires the development of new eco-friendly and cost efficient methods of crop production. In this study we tested if engineering Brassica microbiome by supplementation it with an inoculum composed of selected microorganisms can accelerate seedling growth and be a substitute for inorganic fertilizers. We hypothesised that the mu...

Microorganisms play a key role in plant adaptation to the environment. The aim of this study was to evaluate the effect of toxic metals present in the soil on the biodiversity of plant-related, endophytic mycobiota. The mycobiome of plants and soil from a Zn-Pb heap and a metal-free ruderal area were compared via Illumina sequencing of the ITS1 rDN...

The endophytic Basidiomycete Sporobolomyces ruberrimus protects its host Arabidopsis arenosa against metal toxicity. Plants inoculated with the fungus yielded more biomass and exhibited significantly fewer stress symptoms in medium mimicking mine dump conditions (medium supplemented with excess of Fe, Zn and Cd). Aside from fine-tuning plant metal...

Toxic metal pollution requires significant adjustments in plant metabolism. Here, we show that the plant microbiota plays an important role in this process. The endophytic Sporobolomyces ruberrimus isolated from a serpentine population of Arabidopsis arenosa protected plants against excess metals. Coculture with its native host and Arabidopsis thal...

In this work, platinum nanoparticles (PtNPs) were synthesized by a modified polyol process using TEMPO-oxidized nanocellulose (TOCN) as a stabilizing and co-reducing agent. Different ratios of TOCN nanocellulose to Pt⁴⁺ ions were studied to establish the optimum stabilizing effect of PtNPs. The effect of different pH of aqueous TOCN suspensions on...

Ecological methods are becoming increasingly popular. One of these methods is plant biotization. In our paper, we focus on selection of Vaccinium corymbosum hairy root-inhabiting fungi for plant growth promotion in a single microorganism inoculation setup and then composed a multiorganismal inoculum enriched with a representative of another group o...

The post-combustion of methane from stationary sources such as powerplants at biogas installations is an important issue for scientists to address due to the quantities of methane released into the atmosphere. Methane is one of the greenhouse gases, thus its emission should be reduced. Here is shown a converter module designed for methane combustio...

The effective sorption of methane with mesoporous adsorbents is one of the most sought-after methods of energy storage. The constant development of organometallic networks and the synthesis of new materials increases the efficiency of methane sorption, reaching new record amounts of gas adsorbed per gram of adsorbent. In this study, we present the...

The removal of uremic toxins from patients with acute kidney injury is a key issue in improving the quality of life for people requiring peritoneal dialysis. The currently utilized method for the removal of uremic toxins from the human organism is hemodialysis, performed on semipermeable membranes where the uremic toxins, along with small molecules...

The objective of our study was to prepare Y-, USY- and ZSM-5-based catalysts by hydrothermal synthesis, followed by copper active-phase deposition by either conventional ion-exchange or ultrasonic irradiation. The resulting materials were characterized by XRD, BET, SEM, TEM, Raman, UV-Vis, monitoring ammonia and nitrogen oxide sorption by FT-IR and...

In this work, an experimental setup is established to investigate the heat transfer and flow resistance of wire gauzes. Five woven metal sheets of plain-square type differing in wires diameter and mesh size is tested. Based on the measured heat transfer coefficients and pressure drops of wire gauzes, the empirical equations of friction and transfer...

To improve the efficiency of Ni phytoextraction, the metal hyperaccumulator N. goesingensis was subject to treatment with a combination of a Ni uptake stimulating microorganism and the commercially available, IAA- based biostimulating seaweed extract - Kelpak. Additionally, we compared the plant growth promoting and Ni uptake capabilities of the tw...

The role of endophytic fungi isolated from different populations of Europaean Ni hyperaccumulators was investigated in regard to the microorganisms' ability to enhance the hyperaccumulation of Ni in Noccaea caerulescens. Effects of particular species of endophytic fungi on adaptation of N. caerulescens to excess Ni were tested by co-cultivation wit...

Grass pea (Lathyrus sativus) is a leguminous plant of outstanding tolerance to abiotic stress. The aim of the presented study was to describe the mechanism of grass pea (Lathyrus sativus L.) photosynthetic apparatus acclimatisation strategies to salinity stress. The seedlings were cultivated in a hydroponic system in media containing various concen...

Full version available at https://authors.elsevier.com/c/1bcTq4x7R2W4-L Hexagonal channels display promising flow and transfer characteristics, thus they are considered as prospective structured catalyst carriers. While transfer intensity in long channels is rather moderate, it may be greatly enhanced by channel shortening, because developing lam...

Root transcriptomic profile was comparatively studied in a serpentine (TM) and a non-metallicolous (NTM) population of Noccaea goesingensis in order to investigate possible features of Ni hyperaccumulation. Both populations were characterised by contrasting Ni tolerance and accumulation capacity. The growth of the TM population was unaffected by me...

Understanding the mechanisms of plant tolerance to osmotic and chemical stress is fundamental to maintaining high crop productivity. Soil drought often occurs in combination with physiological drought, which causes chemical stress due to high concentrations of ions. Hence, it is often assumed that the acclimatization of plants to salinity and droug...

The aim of this study was to obtain and characterise thin metal organic frameworks layers supported on various metallic structured carriers such as FeCrAl plates and woven gauzes and NiCr foams. The thin layers of the metal organic frameworks were fabricated by in situ solvothermal deposition, optimised by the selection of metal precursor and the l...

Sixteenth-century Arrases from the Krakow Royal Castle constitute a Polish national cultural heritage; hence, they should be under special protection. The storage of historic objects at strict temperature and humidity conditions is fundamental for their protection against microorganisms. However, sometimes active preservation must be applied to dis...

Many areas intended for crop production suffer from the concomitant occurrence of heavy metal pollution and elevated salinity; therefore, halophytes seem to represent a promising perspective for the bioremediation of contaminated soils. In this study, the influence of Cd treatment (0.01–10.0 mM) and salinity stress (0.4 M NaCl) on the expression of...

Ceylon leadwort (Plumbago zeylanica) is ornamental plant known for its pharmacological properties arising from the abundant production of various secondary metabolites. It often grows in lead polluted areas. The aim of presented study was to evaluate the survival strategy of P. zeylanica to lead toxicity via photosynthetic apparatus acclimatization...

The objective of our study was to develop and optimize the in situ synthesis of zeolitic thin coatings with USY (ultrastabilised form of faujasite) and MFI (Model Five) type structure on metallic structured catalysts supports using the hydrothermal method. Thus, obtained zeolitic materials were studied in terms of their prospective activity in sele...

Design of the catalytic properties and structure of zeolite materials play a key role in efficient transformation of biomass to sustainable chemicals. In the present study, we have designed theoretical and experimental approach for the production of acrylic acid (AA) from lactic acid (LA) over zeolite catalysts. Various BEA zeolites modified with m...

Many areas exhibiting increased concentrations of soluble salts are simultaneously polluted with heavy metals (HM), and halophytes with extended tolerance to heavy metal toxicity seem to represent a promising tool for their phytoremediation. In this study, the response of the soil-grown C3-CAM (Crassulacean acid metabolism) intermediate halophyte M...

The aim of this study was to examine efficacy of different fractions of TEMPO-oxidized cellulose nanocrystals (TOCNs) as a reducing and capping agent of silver nanoparticles (AgNPs). Silver nanoparticles were prepared by thermal treatment of AgNO 3 in aqueous suspensions of TOCN fractions. Three different nanocomposite materials based on different...

The aim of this study was to obtain antimicrobial material based on thin zirconium dioxide coatings on structured reactors doped with metal nanoparticles using the sonochemical sol-gel method. As a result, dense, uniform zirconium dioxide films were obtained on the kanthal sheets which can be used as support materials in antimicrobial converters wi...

The aim of this study was to obtain highly active catalysts based on non-noble metal oxides supported on zirconia prepared via a sonochemical method. In this study, the influence of the stabilizers addition during the preparation step was checked. The final catalysts were characterized by using such characterization methods as X-ray Diffraction (XR...

Przedmiotem wynalazku jest modyfikowany materiał nanokompozytowy oparty na celulozie oraz sposób jego wykonania. http://pubserv.uprp.pl/PublicationServer/index.php?strona=lw&number=P.411409

Kidney vetch (Anthyllis vulneraria L.) is a well-known Zn hyperaccumulator. Zn often occurs with Pb in one ore; thus, plants inhabiting waste dumps are exposed not only to Zn but also to Pb toxicity. While the response of kidney vetch to Zn toxicity is relatively well known, the Pb survival strategy of Anthyllis vulneraria has not been the subject...

Industrial waste sites, although extremely difficult to revegetate, may be suitable for rare plants such as Orobanche lutea that are condemned to extinction due to their low ability to compete in their natural habitats. The presence of potentially toxic metals seems to facilitate the expansion of O. lutea (parasitizing Medicago falcata) and was fou...

Phytoremediation of polluted sites can be improved by co-inoculation with mycorrhizal and endophytic fungi. In this study, the effects of single- and co-inoculation of Lactuca serriola with an arbuscular mycorrhizal (AM) fungus, Rhizoglomus intraradices, and endophytic fungi, Mucor sp. or Trichoderma asperellum, on plant growth, vitality, toxic met...

Over the last years the role of fungal endophytes in plant biology has been extensively studied. A number of species were shown to positively affect plant growth and fitness, thus attempts have been made to utilize these microorganisms in agriculture and phytoremediation. Plant-fungi symbiosis requires multiple metabolic adjustments of both of the...

The study is devoted to manufacturing and characterising a new paper material with antimicrobial properties, as an alternative to paper containing silver nanoparticles (NPs) which are claimed to be harmful to the ecosphere. In place of silver NPs, the new material contains faujasite mineral (from the faujasite group) exchanged with silver cations w...

Iron-substituted MFI, Y and USY zeolites prepared by two preparation routes-classical ion exchange and the ultrasound modified ion-exchange method-were characterised by micro-Raman spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and ultraviolet (UV)/visible diffuse reflectance spectroscopy (UV/Vis DRS). Ultrasound irradia...

The aim of this study was to obtain thin zirconium dioxide coatings on structured reactors using the sonochemical sol-gel method. The preparation method of metal oxide layers on metallic structures was based on the synergistic combination of three approaches: the application of ultrasonic irradiation during the synthesis of Zr sol-gel based on a pr...

The process of methane combustion over the surface of a catalyst is still not fully understood. The identification of the reaction path and the intermediates created during catalysis is crucial for understanding the transformation of methane molecules. Two-dimensional (2D) correlation spectroscopy was engaged as a tool for the quantitative analysis...

The endophytic fungus Mucor sp. was isolated from Arabidopsis arenosa inhabiting post mining wastes lands. Its role in plant adaptation to toxic metal enriched environment was evaluated. Plants inoculated with the fungus yielded significantly more biomass. Their growth response was correlated with significant elongation of root hairs, an improved w...

This paper reports the results of the study of surface properties and catalytic activity of cobalt, palladium, and mixed oxide catalysts supported on alumina. Catalytic materials were prepared by the wetness impregnation method directly from solutions of metal salts and using the ultrasound irradiation. The material surface was investigated by micr...

A goal of our study was to find an alternative to nano‐silver‐based antimicrobial materials which would contain active silver immobilized in a solid matrix that prevents its migration into the surrounding environment. In this study, we investigated whether silver cations dispersed in an atomic form and trapped in an ion‐exchanged zeolite show compa...

Przedmiotem wynalazku jest materiał nanokompozytowy, sposób jego wytwarzania oraz zastosowanie. Bardziej szczegółowo rozwiązanie dotyczy: opakowaniowego materiału nanokompozytowego.

The aim of this study was to obtain nanocrystalline mixed metal-oxide–ZrO2 catalysts via a sonochemically-induced preparation method. The effect of a stabiliser’s addition on the catalyst parameters was investigated by several characterisation methods including X-ray Diffraction (XRD), nitrogen adsorption, X-ray fluorescence (XRF), scanning electro...

Metallic supports play an important role as structured reactor internals. Due to their specific properties including enhanced heat and mass transport, high mechanical resistivity and elimination of local hot‐spots, they are commonly used in gas exhaust abatement from stationary and automotive industries. In this study, the performance of three stru...

This study is an approach to resolve the mechanism of methane catalytic combustion over a series of palladium and cobalt palladium and ceria-doped catalysts supported on γ-Al2O3. The first and most important question addressed is whether methane adsorbs on the surface of the catalyst. Another task was to determine the stable intermediate products o...

The invention relates to a method of preparing a layer of zirconium(IV) oxide, as a catalytic carrier, on a metallic substrate by means of sol-gel method.

New catalytic systems are still in development to meet the challenge of regulations concerning the emission of volatile organic compounds (VOCs). This is because such compounds have a significant impact on air quality and some of them are toxic to the environment and human beings. The catalytic combustion process of VOCs over non-noble metal cataly...

The aim of this study was to obtain and characterise the series of cobalt based structured catalysts prepared by non-equilibrium plasma deposition. The catalysts were obtained under oxygen-rich and oxygen-free conditions. The catalysts were characterised by using spectroscopic and microscopic methods including AFM, SEM, EDS, in situ μRaman and XPS....

A question arises whether the kinetic parameters derived from the Arrhenius equation presented in the literature in fact reflect intrinsic kinetics or are influenced by diffusional effects. It is commonly accepted that diffusion can not only influence (reduce) the reaction rate but also change the observed kinetic constants and reaction order. In t...

In this paper, both a structured catalyst based on FeCrAl (Kanthal) foam with in situ synthesized CuSSZ-13 and powder CuSSZ-13 were prepared and tested in NH3-SCR. The kinetic data derived at diffusion-free parameters window were combined with mass transport and pressure drop correlations (experiments from our previous work [1]) for three typical r...

The invention relates to a method of preparation of metal oxide catalyst by ultrasound-assisted synthesis procedure. The catalyst is designed to use in volatile organic compounds combustion, especially methane, contained in exhaust gases.

The aim of this study was to test sonochemical method to modify surface of catalysts to obtain highly dispersed and active materials for methane combustion. The catalysts were characterised by various physicochemical characterisation methods including: DLS, BET nitrogen adsorption, SEM, EDX and ED-XRF. The results of classical surface analyses and...

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A nanocomposite material with antimicrobial properties, based on cellulose packed with a mineral filler (zeolite) exchanged with silver, characterised in that the mineral filler is made up of Y-type zeolites, while silver occurs in a form bound with the zeolite matrix in the form of cations and, optionally, nanoparticles of reduced silver, as well...