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The study focuses on fortifying bread with flaxseeds to enhance its nutritional and health benefits. The study evaluates the sensory and functional properties of bread when fortified with varying concentrations of flaxseeds (5%, 10%, and 15%). Flax seeds are rich in omega-3 fatty acids, dietary fiber, lignans, and proteins, all of which contribute to improved heart health, digestive function, weight management, and cancer prevention. The incorporation of flaxseeds in bread offers an effective way to increase these nutrients in the daily diet. The study includes sensory analysis of bread fortified with flaxseeds in different concentrations. The sensory attributes analyzed were appearance, aroma, texture, and taste. The bread samples with increasing levels of flaxseeds showed differences in crust color, crumb softness, and flavor, with higher flaxseed concentrations leading to darker crusts, firmer crumbs, and a stronger nutty aroma. The bread was prepared using a direct method with wheat flour, flaxseeds, yeast, water, salt, and sugar. Sensory analysis was conducted by a panel of evaluators using a hedonic scale, assessing attributes like taste, aroma, and crumb texture. Bread fortified with 5% flaxseeds was found to be most acceptable in terms of sensory properties and overall appeal. As the flaxseed concentration increased to 10% and 15%, the bread became denser, harder, and slightly bitter, though still acceptable for niche markets. The study highlights the health benefits of consuming flaxseed-fortified bread, such as improved cardiovascular health, better digestion, and cancer prevention. Additionally, flaxseed fortification offers a cost-effective way for bakeries to cater to health-conscious consumers and meet the growing demand for functional foods. The study concludes that fortifying bread with flaxseeds provides significant health benefits while maintaining acceptable sensory qualities, especially at lower concentrations (5%). It suggests that flaxseed-fortified bread is a viable option for improving public health and aligning with consumer preferences for nutritious and functional food products. [ABSTRACT FROM AUTHOR]

The paper explores the concept of the short food chain and its role in the sustainable development of mountain areas. The short food chain involves reducing the number of intermediaries between producers and consumers, thereby promoting the direct sale of local products. This approach brings multiple benefits to the local economy and the environment. Mountain areas, characterized by economic and social vulnerabilities, can benefit from short food chains by supporting small producers and conserving biodiversity. A key aspect of the paper is the analysis of how short food chains support the local economy. Farmers can obtain more advantageous prices by eliminating intermediaries, which improves their living conditions. Short food chains also stimulate rural tourism and attract consumers interested in authentic and sustainable products. The paper provides examples from mountain regions in Europe and Romania to illustrate the positive impact of these food chains. For example, in the Italian Alps and the French Pyrenees, local farmers have succeeded in capitalizing on their traditional products through local markets and cooperatives, thus contributing to the development of the rural economy and environmental protection. In Romania, regions such as Țara Moților and the Apuseni Mountains demonstrate how short food chains can support the local economy and agricultural traditions, providing farmers with a viable alternative to long commercial chains. With the support of public policies and community cooperation, short food chains have become a successful model for the sustainable development of mountain areas. This approach helps reduce carbon emissions, conserve natural resources, and maintain cultural traditions, offering a sustainable solution to the economic and environmental challenges facing these regions. [ABSTRACT FROM AUTHOR]

This paper examines the role of informational content in promoting tourism services in Romania, emphasizing the importance of well-designed websites and effective digital strategies. In a globalized and competitive tourism market, a destination's visibility depends largely on the methods and technologies used to communicate with potential visitors. Continuous promotion is vital for maintaining tourist interest and supporting sustainable development. Promotion enhances the attractiveness of tourist destinations by increasing visibility, attracting more tourists, strengthening the destination’s brand, and stimulating demand for services such as accommodation, recreation, and dining. It also plays a key role in promoting local culture and protecting natural resources, which is essential for sustainable tourism. Websites are crucial for tourism promotion, providing direct access to information and reservation systems. A well-optimized website should offer clear, user-friendly access to key details about attractions, events, and services. Multimedia content, such as images and virtual tours, adds to the visual appeal, while functionalities like online bookings and SEO optimization ensure accessibility for a broader audience. Keyword analysis from major Romanian tourism portals like Romania.travel, Infoturism.ro, and Turistinfo.ro highlights the importance of using both general and niche keywords. These keywords enhance search engine visibility and help cater to various tourist preferences, from cultural experiences to ecotourism and city breaks. In conclusion, online content and digital marketing strategies are essential tools for promoting tourism in Romania, ensuring that destinations remain competitive, attractive, and sustainable. [ABSTRACT FROM AUTHOR]

Abstract Magnetic nanoparticles (MNPs) are of great interest for their wide applications in biomedical applications, such as bioimaging, antitumoral therapies, regenerative medicine, and drug delivery. The work aimed to obtain biocompatible magnetite nanoparticles coated with amino acids of the general formula Fe3O4@AA (AA = L-tryptophan, L-serine, L-proline and L-cysteine) for potential therapeutic application in anticancer drug delivery. The obtained materials were characterised using XRD, FTIR, DLS analysis, SEM, thermogravimetry (TG), differential scanning calorimetry (DSC), and UV–vis spectroscopy. The photocatalytic, cytotoxic and antimicrobial activity tests of the obtained materials were carried out. The choice of amino acid determines the properties of the material and its future use, for example, Fe3O4@Cys supports radical production, which may increase the efficiency of catalytic degradation, while tryptophan captures radicals, which may be an advantage in several biomedical applications. Fe3O4@Trp exhibited good antimicrobial activity (MBEC and MIC) against E. coli ATCC 25922, P. aeruginosa ATCC 27853 and C. albicans ATCC 10231 while Fe3O4@Pro exhibited the best results against S. aureus ATCC 25923.

The paper addresses issues related to the shelf life of some snacks type food products developed within the SUMAFOOD project, with the addition of Saccharina Latissima algae powder, respectively hydrolyzed fish protein. The replacement coefficients of wheat flour in the recipe varied between 1.5% and 6%. The results show a good stability of the products, but in the case of using hydrolyzed fish protein, there is the phenomenon of lipid oxidation due to their high content of unsaturated fatty acids. Oxidation leads to rancidity and the production of undesirable volatile compounds due to the secondary level of oxidation that negatively affects the nutritional value and sensory characteristics of the products. Therefore, it is important to investigate different preservation techniques, mainly by using natural antioxidants (i.e. rosemary extract) to extend the stability of biomass powders. [ABSTRACT FROM AUTHOR]

The pressure on global food systems is likely to increase in the coming years. Population growth, increasing urbanization and changes in eating habits are trends that set the stage for a growing demand for food. The UN's Food and Agriculture Organization (FAO) has estimated that projected demand requires a 70% increase in global food production by 2050. A sustainable blue economy is part of the EU's strategy to increase the use of marine resources to produce new foods and food supplements. Increased use of marine resources for alternative food production will help alleviate pressure on land resources for agriculture, in addition to mitigating climate change and ensuring food security and sustainability. The paper presents the objectives, research methodology and part of the results of the ERANET SuMaFood project (www.sumafood.eu). SuMaFood is an international partnership between 3 industrial partners, 3 universities and R&D research institutes from Greece, Norway, Romania and Spain, coordinated by SINTEF Energy Research (Norway). The objective of the project is to design new and innovative methods of processing and preservation, including improved solutions for fish residue separation and fractionation, low temperature stabilization, hydrolysis and drying. In addition, macroalgae (seaweed Saccharina Latissima) raw materials were dried, analyzed and tested as a food ingredient. The ingredients, (seaweed Saccharina Latissima and hydrolyzed cod fish protein) were supplied in the form of a powder with reduced moisture and were included separately in various baking recipes, with a replacement degrees of wheat flour of 0%, 1.5%, 3 %, 4.5%, 6%. Chemical potential, rheological and enzymatic properties, as well as consumer acceptability were evaluated. Textural analyzes were performed for 96 hours of storage. The results showed great nutritional potential, given the high value of fish proteins as well as the high fiber content, Ca, Fe, P, K, Mg, I, in the case of the algae used. The rheological and enzymatic analyzes were carried out with the Mixolab equipment and the Chopin + method, according to the ICC173 standard and showed very good baking characteristics in the case of additions of a maximum of 4.5% of hydrolyzed proteins. In the case of the addition of algae, the breadability characteristics are maintained at acceptable values for a degree of substitution of a maximum of 3%. The sensory evaluation of the bakery products obtained showed a pronounced after-taste in the case of fish protein, which limited the addition to a value of 1.5%. In the case of algae, consumers penalized the sour, salty and bitter taste of bakery products with the addition of 4.5% and 6%. Textural analyzes of bread samples showed an increase in firmness and gumminess over time and with increasing algae addition; in the case of fish protein, an increase in firmness and a decrease in cohesiveness were observed over time and with increasing protein addition. Experimental research on bakery samples offers exciting possibilities for the use of marine resources, aiming at a safe and secure future food system. [ABSTRACT FROM AUTHOR]

Experiments were carried out with the aim of determination of the suitability of fruits of rose hips for processing of jelly. Jellies with rosehip extract represent an innovative product that stands out for its special sensory and nutritional characteristics, the rosehip extract successfully complementing the functional valences of the jellies. In the sensory analysis, three variants of jellies with different rosehip extracts were tested. According to the sensory analysis, the most appreciated version was the one with berry syrup and rosehip extract. [ABSTRACT FROM AUTHOR]

Phlebotomy is presumably the most challenging preanalytical aspect in laboratory medicine. In Europe, inpatient phlebotomy is performed by nurses in 45–60 % of cases. We aimed to develop and test a novel phlebotomy assessment tool for nurses.

The paper presents the results of preliminary investigations on the acceptability of snacks with the addition of 6% protein flour from salmon. Protein flour was obtained by hydrolysis of waste from a salmon processing factory in Norway. The sncaks type products were made in 2 variants, with and without cumin (3%). The 12 respondents were selected on the basis of a questionnaire, based on principles such as: non-smokers, without medical conditions that may influence the answer. The results showed an overall degree of acceptability of 6.92 from a maximum of 9. The researches are part of the project activities of contract no 245/2021, project acronym SUMAFOOD (SUSTAINABLE PRESERVATION OF MARINE BIOMASSES FOR AN ENHANCED FOOD VALUE CHAIN), stage 2, 2022. [ABSTRACT FROM AUTHOR]

The paper briefly presents some of the results of the study conducted on the potential of the marine biomass processing industry, a study conducted within the project SUMAFOOD (SUSTAINABLE PRESERVATION OF MARINE BIOMASSES FOR AN ENHANCED FOOD VALUE CHAIN ) - ERANET BLUE -- BIO 245/2021. SuMaFood is tailored to provide significant advancements to the supply systems of the blue bio-economy value chains. The project addresses the utilization of marine biomasses and by-products and will demonstrate how such resources can be made available and attractive to the consumers. In this regard, several aspects of innovative improvements to supply systems is addressed, including sorting and handling, drying technologies, cooling and freezing, and determination of other sustainable pre-processing and preservation techniques. The purpose is to increase the use of raw materials, demonstrate waste reduction, enhance product quality and stability, extend product ranges, and to provide unique products in a growing marine food chain. The objective is also to demonstrate significant energy savings and reduced CO2 emissions in processing technologies, thereby contributing to a lower carbon footprint and increased sustainability in blue bio-economy value chains. The preliminary study investigates the economic history of the most important fish processing companies in Romania, as production units with the potential to implement technical and managerial solutions for capitalizing on by-products and waste in the industry. The conclusions of the study reveal the special potential of the fish processing industry in Romania and the need for superior recovery of waste and by-products from this industry by integration in various feeds or even food products for human consumption. [ABSTRACT FROM AUTHOR]

Romania is, along with Bulgaria and Turkey, one of the largest consumers of bread in Europe. Gluten intolerance, the incidence of type 2 diabetes and the low consumption of dietary fiber with all its implications raise, in these conditions, the problem of improving the sanogenic characteristics of bakery products in Romania. The paper presents a study on the supply of bakery products on the Romanian market in the last decade evolution of annual consumption of bakery products taking into account consumer preferences, social origin, age, selection criteria, sources of supply, frequency of consumption and value assigned. The results show a surprising awareness of the benefits of bakery products rich in fiber and minerals from the young generation. The conclusions drawn from this study are useful for designing a new type of functional bakery products taking into account the profile of the consumer (target group) to whom it is addressed. [ABSTRACT FROM AUTHOR]

Quality Control (QC) in Romania is regulated by the Order of the Minister of Health no. 1608/2022 that modifies the previous Order 1301/2007. The new version of the Order introduces a more scientific approach by requesting the laboratories to assess test performance and then elaborate an appropriate internal QC plan. The aim of this study was to demonstrate how to design a QC plan for complete blood count (CBC) in an Emergency Laboratory with continuous activity, in order to comply with the new Order 1608/2022. QC data obtained over a three-month period (April-June 2022) from the Sysmex XN-1000 instrument of the Emergency Laboratory of the County Emergency Clinical Hospital of Târgu Mureș were included. In order to establish an appropriate QC plan, two models were applied and the following parameters were calculated: the number of daily QC runs (N), the probability of false rejection (Pfr), the QC frequency (run size), and the required QC rules. White blood cells achieved high performance, while Hematocrit performance was poor. Different levels of performance were achieved for Platelets. We emphasize that, when all parameters are measured on the same instrument, QC frequency and Pfr should be adjusted in order to develop a QC plan that “fits” all the parameters of the CBC as a whole. In our Emergency Laboratory, the calculated QC plan for CBC is N=2, Pfr=0.03, multi-rule 1:3s/2:2s/R:4s, and a run size of 95 samples which is approximately the same as the number of CBCs performed during one 12-hour shift.

Objective: During the COVID-19 pandemic, laboratories have used various extraction and amplification kits, associated with different auxiliary materials. This study aims to investigate how different types of plates may affect RT-PCR performance.

This paper presents a new approach about the color of wheat bread crumb with grape seed flour (GSF) substitution. This is an important contribution to the assessment of bread quality, that can be quantified by image analysis of color. This paper analyze the bread slice images in order to quantify the differences in crumb color of bread products made with different substitution percentages of grape seed flour. Comparative analysis of the results achieved with ImageJ algorithms showed a significant difference between the studied parameters. [ABSTRACT FROM AUTHOR]

Objective: Ammonia is extremely unstable in blood specimens and has special requirements during transport, processing and storage. The aim of our study was to determine the stability of ammonia in EDTA K3 blood samples and to establish a protocol for sample handling.

Large clinical laboratories often rely on multiple chemistry analyzers. However, when a new analyzer is introduced, the laboratory must establish whether the old and new methods are comparable and can be used interchangeably. In this study, we compared the newly introduced Atellica CH930 chemistry analyzer with the already established Architect ci4100 and Cobas 6000 c501 from our laboratory.

The paper presents a review of antimicrobial activity of Thymus vulgaris, Maleleuca and Ocimum basilicum which is detailed in chapter 3. In the first part of the study the biological importance of plants was appreciated, the most common being the antioxidant, antimicrobial, antibacterial and antifungal activity. The most interesting being found in the case of Ocimum basilicum which is cytotoxic against common foodborne bacteria and essential oil exhibited most potent antiproliferative activity against an in vitro human colon carcinoma model. For the antimicrobial activity test, the two most common methods described in the last part of the article, Disk Diffusion Assay and Determination of Minimal Inhibitory Concentration (MIC) and Non-Inhibitory Concentration (NIC) have been described, the first method being the most used. [ABSTRACT FROM AUTHOR]

Mycotoxin contamination of food and feed depends on environmental / climatic /storage conditions, harvesting techniques and some others factors. A survey study was performed using students from Transilvania University of Brasov (UTBV) and Erasmus students in UTBV in 2013/2014 in order to identify the level of their knowledge concerning the topic of mycotoxins in agricultural and food derived products. The results were compared and the differences and similarities between the groups were indicated, also in the context of the demonstrated data coming from the scientific literature. [ABSTRACT FROM AUTHOR]

The paper presents the benefits of bread with grape seed flour, because of its nutrional properties. There was made a case study in Covasna County, taking into account the calculation of the material balance, the choice of the necessary equipment and their location in the production unit. The need for final products was calculated starting from the number of tourists that check in into the Mercur hotel and the number of patience that are using the facilities of the heart hospital and their need of bread consumption. The calculations show the sustainability of the chosen technological solution, which can be applied in medium or large size units. [ABSTRACT FROM AUTHOR]

Objective:the aim of this study was to evaluate the imprecision of the method used to determine TSH (Thyroid Stimulating Hormone) levels from dried blood spots in a newborn screening program and how the value of the coefficient of variation influences the total error of the method.

Introduction: The aim of this study was to determine the performance of the total testing process of complete blood count (CBC) on two different instruments in an emergency setting of a county hospital, and to design an appropriate internal quality control plan.

The aim of this study was to determine the rate of hemolyzed specimens sent to our laboratory for coagulation testing, assess the interference of hemolysis on coagulation for patients without anticoagulant therapy and to determine the reference intervals for PT, INR and aPTT for our laboratory in order to test our own limitations.

In this paper, we describe the synthesis of CeO2 nanoparticles by nanocasting route on the mesoporous silica support. In the first step, mesoporous silica (SBA-15 structure) was prepared using a soft template and in the second step, this material was used for impregnation with CeO2 nanoparticles. The obtained nanocomposites were morphologically and structurally characterized by XRD diffraction, FT-IR, UV-Vis and PL spectra. [ABSTRACT FROM AUTHOR]

Background: The aim of the study was to determine the utility of plasma NfH in correlation with serum hsCRP for severity and short-term functional outcome prediction after ischemic stroke. Methods: 124 patients and 40 healthy controls were enrolled, serial plasma neurofilament heavy chains and hsCRP concentrations were measured and evaluated for TOAST subtype, stroke severity and functional outcome at discharge. Results: Serum level of hsCRP was significantly higher in patients versus controls (p

Nanocrystalline ZnO particles were prepared from ethanolic solutions of zinc acetate by forced hydrolysis, at a low temperature. The fresh prepared ZnO nanoparticles were coated with gentamicin. The nanoparticles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and thermal analysis (TG-DSC). The electronic (UV-Vis), infrared (FTIR) and photoluminescence (PL) spectra were also recorded. The biological activity tests such as minimum inhibitory concentration (MIC) and disk diffusion were performed in Mueller-Hinton broth using different concentrations of ZnO and ZnO-gentamicin hybrid nanoparticles, by a standard microbial method on Enterococcus faecalis, Salmonella, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Listeria monocytogenes. The bacteriological tests indicate a synergic activity of ZnO-gentamicin nanoparticles. The release rate of gentamicin was monitored photometrically with UV-Vis spectrometer. [ABSTRACT FROM AUTHOR]

As one of the most suitable materials with size- and dimensionality-dependent functional properties, wide bandgap semiconducting ZnO nanostructures have attracted many researchers in recent years. For example, ZnO has been assembled into nanometer-scale visible-light-blind ultraviolet (UV) light sensors with high sensitivity and selectivity, in addition to other applications such as field emitters and lasers. In this paper nanocrystalline ZnO particles were prepared from n-buthanol solution of zinc acetate dihydrate without using base, through a colloid process carried out at refluxing temperature of 118°C. The ZnO nanopowder obtained was characterised by means of XRD, TEM, TG-DSC, UV-Vis, FTIR and fluorescence spectra. The influence of the thermal treatment applied after synthesis on luminescence properties was monitored. We found that there is a clear correlation between the annealing temperature and the ratio of the intensities of the near band-edge and green emissions. [ABSTRACT FROM AUTHOR]

Nanocrystalline ZnO particles doped with Mn(II) ions were prepared by a forced hydrolysis method of zinc acetate dihydrate and manganese acetate tetrahydrate, under reflux, in buthanol. The precipitate obtained was separated by centrifugation at 9.000 rpm and purified by refluxing in water. The dopant percentage was 1, 2.5 and 5%. The qualitative composition of the nanopowder has been evidenced in the elemental EDS maps. Optical investigation shows that the Mn doping in ZnO lattice leads to a decrease in the near band edge position due to the introduction of new unoccupied states by Mn 3d electrons. The luminescence of ZnO is quenched by increasing the dopant ions percentage. At doping rate of 1% Mn in the ZnO lattice a tenfold decrease in intensity of luminescence was observed, along with modification of the luminescence pattern. Further increases of dopant percent from 1% to 5% had as result a decrease of only 30% in the luminescence intensity. The photocatalytic activity was investigated against methylene blue. The increase of Mn percentage leads to a better photocatalytic activity. [ABSTRACT FROM AUTHOR]

Nanocrystalline ZnO particles doped with Gd(III) ions were prepared by a simple sol-gel method from methanolic solution of zinc acetate dihydrate, aqueous solution of Gd(NO3)3.9H2O, and starch. By calcination of the xerogel at 400°C we obtained nanopowders of ZnO doped with Gd(III) ions. The dopant percentage was increased up to 5%. Optical investigation shows that the Gd doping in ZnO lattice leads to a decrease in the near band edge position due to the introduction of new unoccupied states by Gd 4f electrons. The blue-green luminescence is enhanced by increasing the Gd(III) percentage. In addition, the photocatalytic activity was investigated against methylene blue [ABSTRACT FROM AUTHOR]

Nanocrystalline ZnO particles were prepared from methanolic solutions of zinc acetate dihydrate without using base such as NaOH or LiOH through a colloid process carried out at a low temperature of 60oC. The precipitate obtained after 12-72h contained ZnO, covered with polymeric species of zinc hydroxo acetate. The reaction course was studied by mass spectrometry means. To complete the hydrolysis process, up to pure ZnO, it was necessarily to reflux the white precipitate separate from methanolic solution, in water at 80oC. We found that reaction time in the presence of methanol primarily influenced the size of the particles, while the reaction time in the presence of water mainly influenced the ZnO purity. [ABSTRACT FROM AUTHOR]

Precursor method was used in order to obtain alkali earth metal indates. The multimetallic complexes, namely: (NH4)4[CaIn2(C4O6H4)3(OH)6]·4H2O, (NH4)3[SrIn2(C4O6H4)3(OH)5]·4H2O and (NH4)3[BaIn2(C4O6H4)3(OH)5]·3H2O have been synthesized and investigated by infrared and emission spectra as well as by thermal analysis. The alkali earth metal indates obtained by decomposition of these compounds have been characterized by X-ray powder diffraction, infrared, diffuse reflectance and emission spectra. The photocatalytic activity was evaluated [ABSTRACT FROM AUTHOR]

The process of European financial integration 2009-2010, amid the economic and financial crisis, the main reason for the decline being the protectionist measures implemented in some countries. The idea of research is to explore the relationship between European financial integration and economic growth in the countries of the European Union under the impact of the crisis. The purpose of this study is to analyze how the financial integration process has positively or negatively influenced economic growth under the impact of the economic crisis by analyzing previous studies on the subject. We noticed that the process of financial integration and economic growth under the influence of the crisis was discussed in many studies in the literature, most of them using different techniques and methodologies to quantify these phenomena by means of indicators be estimated.

Grape seed flour from grape marc, a waste product obtained during winemaking, was analyzed for use in bread production due to its potential health benefits. This study evaluated the consumer acceptance and physical properties of bread made with varying quantities of grape seed flour. Dough and breads were prepared using different levels of replacement of wheat flour with grape seed flour (0 to 9 %). The method used for the research was that of the scoring scale, and the marks given by the 15 properly trained panelists indicated that a percentage of 5% grape seed flour by the indirect method leads to statistic characteristics close to those of black bread regarding Standard SR 878/1996.

A survey among the consumers of North-Western region of Russia (St. Petersburg and Leningradskaya oblast) was carried out, to determine awareness and understanding of food labeling, as well as usefulness of various elements of food labeling.

In this paper, we report the synthesis and the crystal structure of a new ZnII-monosquarato complex: [Zn(HC4O4)2(OH2)4], where we have a combination of the oxygen donor and hydrogen bond acceptor capabilities of monosquarate anion, as well as its thermal behavior. From crystallographic point of view, the complex [Zn(HC4O4)2(OH2)4] is isomorphous to the already described complexes [M(HC4O4)2(OH2)4], (M = Mn, Fe, Cd) crystallized in the triclinic space group P-1. In [Zn(HC4O4)2(OH2)4], the metal center is coordinated in an octahedral geometry by six O atoms: four water molecules and two monosquarate (HC4O4 -) ligands arranged in a trans configuration to each other. Packing in this solid is dominated by intermolecular O-H...O hydrogen bonding. The monosquarate anions are associated via the shortest hydrogen bonds which exist in this crystal structure (d1(O...O) = 2.433(3) Å, d2(O...O) = 2.450(3) Å) to form "head-to-tail" infinite onedimensional chains. Adjacent chains are interconnected by [Zn(OH2)4]2+ units. The thermal stability of the compound was investigated by the TG and DSC techniques, and the results suggest that the nanopowder of ZnO (average crystallite size of ZnO particles = 22 nm) is obtained as a final product, through a dehydration / decomposition process. [ABSTRACT FROM AUTHOR]

We describe a simple approach to synthesize pure and manganese doped tin dioxide nanoparticles via a sol-gel method, starting from SnCl4 and MnCl2 in n-buthanol. The XRD analysis shows that well crystallized tetragonal SnO2 was obtained, with a crystallite size of 4nm, when samples were calcined at 350°C. Optical investigation shows that the manganese doping in SnO2 lattice leads to a decrease of the bang-gap energy due to the introduction of new unoccupied states by Mn 3d electrons. The SnO2 nanopowder exhibit strong blue-green luminescence, which indicate the presence of surface defects, such as oxygen vacancies. The emission intensity decreases as the dopant percent increases, indicating that manganese ions can block the blue-green emission by generating nonradiative decay channels or electron capture centres on the surface of nanocrystals. The magnetic susceptibility measurements show that the Mn ions are incorporated in the tin dioxide lattice, and that the samples are paramagnetic at room temperature. [ABSTRACT FROM AUTHOR]

We have prepared ordered mesoporous silicas incorporating the ureido benzo-crown ether: 3- (triethoxysilyl) propyl isocyanate modified 4'-aminobenzo-15-crown-5 ether, TESPIC-CE, either by direct synthesis (co-condensation method, route A) or by post-synthesis grafting strategy (route B). Elemental analysis and XPS measurements, FT-IR spectra, TG/DSC analyses, X-ray powder diffraction, TEM/HRTEM, and N2 sorption isotherms were used to characterise the novel functionalized mesoporous silicas. Grafting of ureido benzo-crown ether onto silica inner surface resulted in the reduction of surface area from ∼1000 m²/g of the pure MCM-41 used as reference to 707 m²/g for MCM-41B(TESPIC-CE) and to 903 m²/g for MCM- 41B(TESPIC)+CE, suggesting that for comparable TESPIC-CE content into silica framework, the heterogeneous method lead to better sorption properties: higher surface area and more efficiently grafting of crown ether inside pores. Interestingly, the MCM-41A(TESPIC-CE) silica obtained by template-directed co-condensation reaction exhibits a relatively high surface area (618 m²/g) while containing about twice as much organic content into mesoporous framework than MCM-41B(TESPIC-CE) or MCM-41B(TESPIC)+CE [ABSTRACT FROM AUTHOR]

This work reports the synthesis of La1-xSrxMnO3 (x=0;0.2;0.3;0.5) doped perovskites via autocombustion method starting from an aqueous solution of metallic nitrates and urea as complexing and fuel agent. The complex precursors obtained have been characterized by electronic and IR spectra, as well as thermodifferential analysis.The oxide powders obtained by heat treatments of precursors at low temperature have been structural characterized by X-ray diffraction and a complete crystallization has been observed between 6000C and 7000C .The crystallite mean size was slightly influenced by the heating temperatures. The electrical and magnetic properties of the as-prepared oxide samples are also reported. [ABSTRACT FROM AUTHOR]

Magnetic (nano)particles are intensively studied in the last years due to their multiple applications. The purpose of this paper is the synthesis of rod-like magnetite by magnetically assisted co-precipitation. The synthesized magnetite nanoparticles were characterized by XRD, DSC-TG and TEM from compositional and especially morphological point of view. The use of 0.5T magnetic field induces a preferential growth of magnetite nanoparticles on the 400 direction while this preferential growth cannot be identified in the absence of the magnetic field proving that the synthesis of rod-like magnetite is due to the applied magnetic field. The mechanism of synthesis was explained based on the magnetite particles behaviour in magnetic field. [ABSTRACT FROM AUTHOR]