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Cement-based construction materials, such as mortars and concretes, are frequently exposed to aggressive environments containing chloride and sulfate ions, leading to corrosion processes that significantly affect their durability and structural performance. In many cases, these degradation phenomena are intensified in industrial environments or coastal areas, where the concentration of aggressive agents is higher. In recent years, the use of nanoparticles as functional additives in cementitious materials has gaine...

The effect of gamma irradiation on the optical band gap of polyimide film and its composites with a filler of finely dispersed powder of high-temperature superconductor (HTSC) YBa2Cu3O6.7 with concentrations of 0.05% by weight; 0.1% by weight; 0.5% by weight was studied. Optical properties were studied in the spectral range of 190-1100 nm using a Shimadzu UV-3600 spectrophotometer. Based on optical absorption spectra and optical band gap calculations for the composite system, we find that the optical band gap (Eg)...

Fertilizers are a fundamental agricultural input, necessary to maintain high yields and exploit soils and growing substrates that are otherwise unsuitable for plant breeding. Nevertheless, their overuse and mismanagement have led to significant negative environmental impacts, such as water pollution, high greenhouse gas emissions and soil degradation. Since the early 2000s, nanofertilizers have been touted as an innovation useful to improve both the sustainability and effectiveness of fertilization methods. The st...

We studied polyimide and lavsan films after exposure to varying doses of electron irradiation, mechanical loading, and temperature. It was found that at the first stage of mechanical loading, up to 1 MPa. A similar sharp increase in the relative elongation of the films by 3% was observed. This is due to the rotation of globules and the straightening of macromolecular chains in the material along the direction of the applied load. The dependence of the absorption coefficient on the wavelength per unit path length i...

The increasing amounts of agro-food waste generated globally represent a major challenge for environmental protection and sustainable development. Among these, onion peels resulting from processing, storage, and commercialization constitute an important source of bioactive compounds such as flavonoids, polyphenols, quercetin, and sulfur-containing compounds, with high potential for valorization in the field of green nanotechnologies. The study aims to valorize the extract obtained from onion peels in the green syn...

In the current nano-tech-era and smart agricultural solutions, the nanoformulations (NFs) application can elicit unpredictable responses, potentially impacting environmental components, human health, and crop performance. Accordingly, this study aimed to quantify the effects of selected nanoformulations (NF) and their conventional agrochemical counterparts on the grain-quality attributes, their technological properties, and physiological responses of crop-wheat. Specifically, selenium-species in nanoformulation (S...

Vaccinium myrtillus L. (European blueberry) hydrophilic extracts (Vm) are valuable raw ingredients for food, cosmetic and pharmaceutical applications. The high content of antioxidant compounds in blueberry can be exploited for obtaining more stable biomaterials. The goal of the study was the evaluation of the antioxidant activity (DPPH-, 2,2-diphenyl-1-pycryl-hydrazyl) of autochthonous blueberry (C-mpeni, Romania) and stabilizing of the Vm by nanoencapsulation in cyclodextrins (CD). Kinetic parameters were also ev...

The goal of the study was the obtaining of Castanea sativa Mill., CS (sweet chestnut) antioxidant extracts and lipid fractions from skin and pulp, followed by nanoencapsulation in cyclodextrins (CDs). The nutritional and medicinal values of fruits are mainly due to the presence of low-gluten carbohydrates, vitamins, as well as essential fatty acids (FA), including omega-3. In this study, the KG variety was subjected to the Soxhlet separation of the lipid fractions (petroleum ether) and antioxidant polyphenols (eth...

We present herein a thoroughly study concerning synthesis, structure and fluorescent properties of two classes of pyrrolodiazine derivatives: pyrrolopyridazine respectively pyrrolophthalazine cycloadducts. The synthesis is straight and efficient, consisting in a 3+2 dipolar cycloaddition reaction of diazinium ylides to dipolarophiles with triple bound. The structure of compounds was proven by elemental and spectral analysis. The fluorescence studies reveal that the pyrrolodiazine compounds are intense blue emitter...

Nanotechnology is increasingly being integrated into modern industrial applications, including the development of next-generation nanofertilizers (NFs) containing essential and non-essential elements such as zinc and silica. These NFs often intensify yield forming attributes without compromising the final crop quality. Larger knowledge about NFs application is still lacking in agronomic academic literature. It is particularly relevant for soybean cultivation, given its importance in human nutrition, feed industry ...