A5057972752- Diatoms and Algae Research
- Algal biology and biofuel production
- Marine and coastal ecosystems
- Zeolite Catalysis and Synthesis
- Paleontology and Stratigraphy of Fossils
- Clay minerals and soil interactions
- Mesoporous Materials and Catalysis
- Ocean Acidification Effects and Responses
- Glass properties and applications
- Microbial Community Ecology and Physiology
- Cephalopods and Marine Biology
- Force Microscopy Techniques and Applications
- Microplastics and Plastic Pollution
- Calcium Carbonate Crystallization and Inhibition
- Molecular Junctions and Nanostructures
- Polymer Surface Interaction Studies
- Identification and Quantification in Food
- Carbon Nanotubes in Composites
- Analytical Chemistry and Sensors
- Marine Biology and Ecology Research
- Dental materials and restorations
- Biocrusts and Microbial Ecology
- Spaceflight effects on biology
- Adsorption, diffusion, and thermodynamic properties of materials
- Nanocluster Synthesis and Applications
Rudjer Boskovic Institute
2012-2025
Institute for Adriatic Crops and Karst Reclamation
2013
Crystallization of zeolite ZSM-5 from a diluted heterogeneous system (12.5Na2O–Al2O3–8TPABr–60SiO2–4000H2O) was investigated by various experimental methods such as X-ray diffraction (XRD), electron (ED), infrared spectroscopy (FTIR), fluorescence (XRF), scanning microscopy (SEM), transmission (TEM), atomic force (AFM), thermo-gravimetric analysis (TGA), particle size (PSA), pH measurement, inductive coupling plasma (ICP) emission spectrometry, and dynamic light scattering (DLS). The...
It is generally accepted that a diatom cell wall characterized by siliceous skeleton covered an organic envelope essentially composed of polysaccharides and proteins. Understanding how the component associated with silica structure provides important insight into biomineralization process patterning on cellular level. Using novel atomic force microscopy (AFM) imaging technique (Peak Force Tapping), we nanomechanical properties (elasticity deformation) weakly silicified marine Cylindrotheca...
Abstract This study examines how salinity reduction triggers the response of three marine microalgae at molecular and unicellular levels in terms chemical, mechanical, behavioral changes. At lowest salinity, all microalgal species exhibited an increase membrane sterols behaved stiffer. The glycocalyx-coated Dunaliella tertiolecta was surrounded by a thick actin layer showed highest physiological activity, negatively affecting cell motility indicating formation palmella stage. lipid content...
Abstract Extracellular polysaccharide production by marine diatoms is a significant route which photosynthetically produced organic carbon enters the trophic web and may influence physical environment in sea. This study highlights capacity of atomic force microscopy (AFM) for investigating diatom extracellular polysaccharides with subnanometer resolution. Here we address ubiquitous Cylindrotheca closterium , isolated from northern Adriatic Sea, its polymeric substance (EPS) at single cell...
Abstract Microalgae are considered an accurate indicator of ecosystem perturbations induced by global climate change. The present work aims to investigate the alteration temperature on surface properties and behaviour three algal species using complementary methods (electrochemical atomic force microscopy). results showed that temperature-induced response algae is species-specific due structural features cell envelope. Wall-less experience largest nanomechanical chemical change, while with...
We present a symmetry analysis of allowed infrared and Raman modes in graphene highly oriented pyrolytic graphite.Surface structure for graphite is examined using atomic force microscopy.As experimental tools, we used spectroscopic ellipsometry order to investigate the pseudodielectric function mid-infrared range (500-7000 cm -1 ) spectroscopy influence layers number decrease.As result, propose method an verification graphene.
Using high resolution molecular technique of atomic force microscopy, we address the extracellular polymer production Adriatic diatom Cylindrotheca closterium analyzed at single cell level and supramolecular organization gel phase isolated from Northern macroaggregates. Our results revealed that polysaccharides freshly produced by marine diatoms can self-assemble directly to form network characteristics macroscopic in natural aquatorium. Based on experiments performed with polysaccharide...
A critical analysis was carried out for the purpose of understanding role subcolloidal (nanosized) (alumino)silicate precursor species in early stage crystallization zeolites heterogeneous systems (hydrogels). The formation and evolution these both solid liquid phases were investigated by various experimental methods such a scanning electron microscopy (SEM, FE-SEM), transmission microscopy, atomic force particle size analysis, pH measurement, absorption spectroscopy, dynamic light...
Vibrio species are widely distributed and can be potentially pathogenic to aquatic organisms. In this study, we isolated spp. from environmental samples (seawater, sediment, fish swabs) collected over a three-year period farm in Mali Ston Bay the Adriatic Sea, Croatia, assess their distribution. A total of 48 seawater 12 sediment samples, as well gill skin swabs 110 farmed European seabass, were analysed for presence Vibrio. strains identified level by MALDI TOF MS. The analysis revealed...
The present study aims at characterizing the three-dimensional (3-D) morphology of a Co-Cr-Mo dental alloy surface as result three different procedures used for polishing it. sample sampled was examined employing atomic force microscopy (AFM), statistical roughness parameters, and fractal analysis. An extra-hard cobalt-chromium-molybdenum (Co-Cr-Mo) (Wironit(®) , from BEGO, Bremen, Germany) prepared moulded. Different treatments were carried out on groups six samples each--a total 18...
The aim of this study was to examine the effect positively charged (amine-modified) and negatively (carboxyl-modified) polystyrene nanoplastics (PS NPs) on nanostructural, nanomechanical, antioxidant responses marine diatom Cylindrotheca closterium. results showed that both types PS NPs, regardless surface charge, significantly inhibited growth C. closterium during short-term exposure (3 4 days). However, longer (14 days) NPs did not inhibit growth, which might be related detoxifying...
The impact of the heavy metal cadmium on lightly silicified marine diatom Cylindrotheca closterium was studied with regard to growth dynamics, organic matter production and morphological characteristics. C. cultures were able sustain positive in tested range 0–1000 μg Cd l–1 a significant decrease specific rate exponential phase at highest concentration. concentrations both dissolved (DOCcell) particulate carbon per cell (POCcell) exposed 500 1000 µg more than doubled compared control...
In the present study, we investigated nitrosoarene dimerization on an Au(111) and surface of gold nanoparticles (AuNPs).High-resolution STM images revealed that 8-thiocyanatooctyl-4nitrosobenzoate (NCS(CH 2 ) 8 OOCC 6 H 4 NO) forms well-ordered monolayer displaying hexagonal 3 structure.AFM data indicated this compound also dimerize thus forming bilayers.On contrary, adsorption 6-(4-nitrosophenoxy)hexane-1-thiol (HS(CH OC leads only to poorly organized monolayer.Furthermore, it was found...