Cristiana Radulescu

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Verified

Cristiana verified their affiliation via an institutional email.

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• PhD Supervisor
• Professor (Full) at Valahia University of Targoviste

In the past 136 years, numerous archaeological finds have enriched the history of Roman Apulum and Roman Province Dacia with new data. Various pieces were described and analyzed from a stylistic point of view, but they were not investigated in terms of non-invasive analytical techniques to elucidate the painting techniques and the materials used. I...

Lilium spp. bulbs are traditionally valued for their medicinal properties, yet their phytochemical profile and biomedical potential remain underexplored. This study aims to assess the antioxidant, antimicrobial, and dermatocosmetic potential of ethanolic extracts from five Lilium cultivars. Bulb macerates were obtained using 70% and 96% ethanol and...

The objective of this study was to evaluate the antifungal activity of extracts obtained from four varieties of grape pomace: two white varieties, Fetească Albă (FA) and Tămâioasă Românească (TR), and two red varieties, Fetească Neagră (FN) and Negru de Drăgășani (ND). This investigation was correlated with their phytochemical profiles, including t...

This research aims to investigate and quantify the possible presence of microplastics (MPs) in usual skin-cleansing products (i.e., liquid soap, micellar water, and micellar cleansing oil), the most popular from the market in terms of brand and customer confidence. Therefore, optical microscopy and micro-Fourier transform infrared spectroscopy (mic...

The main objective of this research is to assess the antifungal activity of grape pomace extracts of four local varieties (i.e., two white, Fetească Albă and Tămâioasă Românească, and two red, Fetească Neagră and Negru de Drăgășani), knowing their valuable chemical profile. The antifungal activity of the extracts was evaluated using two fungi strai...

Grapes are one the most consumed fruits worldwide, whether as fresh table fruits or as processed products such as wine, juice, and sauce, among others. It is well known that grapes are a major source of antioxidants, including phenolic compounds, flavonoids, and carotenoids, which can reduce the risk of oxidative damage by scavenging free radicals,...

This study investigates the development and comparative evaluation of new dermatocosmetic preparations based on hydroalcoholic macerates of rosemary (Rosmarinus officinalis L.), focusing on their antioxidant, antimicrobial, and anti-inflammatory properties. For this purpose, rosemary hydroalcoholic macerations were analyzed by evaluating the conten...

This study assessed the phenolics and antioxidant activities of two local white grape pomace extracts (i.e., Feteasca alba and Tamaioasa Romaneasca). The influence of the extraction procedure (i.e., maceration and ultrasonication) on the total polyphenol content (TPC), total flavonoid content (TFC), and antioxidant activity (AA) of extracts (pomace...

This study aims to investigate the presence of microplastics in dairy products in terms of morphology and chemical composition. Through optical microscopy, microparticles of different colors were identified: ~942 per kg of conventional butter, ~833 per kg of organic butter, and ~800 per kg of sour cream. Micro-FTIR technique through OPUS v.7.5 libr...

În societatea modernă de astăzi, omul exercită o presiune deosebită asupra mediului înconjurător, în special prin extracția minereurilor esențiale și generarea de deșeuri. Inițial, economia circulară a apărut ca o soluție potențială pentru o mai bună utilizare a resurselor naturale. Poziționată ca un concept axat pe tehnologie, care poate genera câ...

This research aims to investigate the heavy metals (i.e., Cd, Cr, Cu, Ni, and Pb) in the fruiting bodies of six indigenous wild edible mushrooms including Agaricus bisporus, Agaricus campestris, Armillaria mellea, Boletus edulis, Macrolepiota excoriate, and Macrolepiota procera, correlated with various factors, such as the growth substrate, the sam...

This chapter explores the interdependence between organizational behavior and the circular economy, highlighting how these concepts work together to develop a sustainable and responsible organizational environment for the future. By clearly defining the terms and basic principles of the circular economy and sustainable development, the chapter lays...

The invention relates to a screening method for imazalil and thiabendazole on the surface of citrus fruits, with applicability in the food safety field. The method, according to the invention, consists of several steps described in the patent application. The proposed screening method is fast (about 40 minutes), with a limit of detection (LOD) set...

The main objective of this study was the archaeometric analysis of eleven ceramic fragments discovered in the archaeological site of Suplacu de Barcău/Porț-Corău, situated in the Northwest part of Romania, more precisely in the Sylvanian Basin. The ceramic fragments come from different archaeological contexts and show a typically decoration, throug...

This study investigates the quality of ten different brands of bottled water purchased from various stores across Romania, using a comprehensive analysis of both physicochemical parameters and heavy metal content. The analyzed parameters include pH, total dissolved solids (TDS), dissolved oxygen, turbidity, free and total chlorine, and conductivity...

This study aims to determine the concentrations of heavy metals and other metals of safety concern in citrus fruit peel extracts. Different types of citrus fruits (i.e., lemon, mandarin, orange, grapefruit, and lime) were collected randomly from markets, during the spring of the year 2024. The inductively coupled plasma mass spectrometry technique...

The current study aims to develop isolation protocols for several contaminants of emerging concern (i.e., microplastics (MPs), polycyclic aromatic hydrocarbons (PAHs), and heavy metals (HMs)) from different commercial brands and raw milk samples and also to quantify and characterize the risks of these contaminants pose to human health. The quantifi...

This study evaluated the phenolic and antioxidant activities of different grape by-products of two white grape varieties (Feteasca alba and Tamaioasa Romaneasca). The influence of the extraction procedure (i.e., maceration and ultrasonication) on the total polyphenol content (TPC), total flavonoid content (TFC), and antioxidant activity (AA) of ext...

Grapes occupy an important position in the human diet, providing both macronutrients and micronutrients indispensable for growth and development. Grapes contain enzymatic and non-enzymatic (nutritional) antioxidants, such as ascorbic acid and bioflavones. High amounts of these valuable compounds are removed through processing, when the skin and the...

Due to its valuable organic compounds, grape pomace represents a valuable resource in the creation of value-added food products. In this study, we investigated grape pomace hydroalcoholic extracts obtained by ultrasonication from two white and two red Romanian grape varieties. The phytochemical parameters, i.e., polyphenolics, flavonoids, anthocyan...

The concept of functional food has been defined several times, the most widely cited definition being that mentioned in the European Consensus Document of the European Commission’s Concerted Action on Functional Food Science (FUFOSE), which was coordinated by the International Life Sciences Institute (ILSI Europe). The European Consensus Document s...

The invention relates to a method of isolating microplastics (MPs) from milk and processed milk-based products (yogurt, sour cream, and butter), to be applied in the food safety field. According to the invention, the method consists of the following stages: A - pretreatment of raw material (milk and processed milk-based products with high-fat conte...

The aim of the Sustain-R&I project is to support the research-innovation activities carried out at the institutional level by training human resources and research groups of excellence for the capitalization of the existing infrastructure, but also the sustainable development of innovation capacity by promoting volunteers in the socio-economic envi...

The present study aimed to identify and characterize the microplastics (MPs) extracted from conventional and organic yogurt, sold in large hypermarket chains in Romania. In this respect, the morphology and chemical composition of MPs, as well as the health risks generated by their presence in yogurt were important to investigate. In the yogurt samp...

This paper presents the oxygen sensing response of a resistive sensor employing sensing layers based on a binary matrix nanocomposite such as carbon nanohorns/polyvinylpyrrolidone and oxidized carbon nanohorns/polyvinylpyrrolidone, both at 9/1 w/w/ mass ratio. The sensing structure comprises a silicon substrate, a SiO2 layer, and interdigitated tra...

The invention refers to a method for isolating microplastics from milk and dairy products with applicability in the field of industry and food safety. The method is characterized by the fact that it requires a sequence of 3 steps: A. pretreatment of the samples with ultrapure reagents necessary for the digestion of the complex organic matrix and ho...

SCDP-Nucet has an essential activity in aquaculture-especially in the genetic improvement of cultured carp and the preservation and usage of freshwater fish genotypes using advanced integrated technologies for fish farming. Climate changes have a crucial role in fish farming because they negatively affect the water bodies and the fish metabolism. T...

Red grapes are rich in phytochemicals such as phenolics and flavonoids, which are strongly correlated with their antioxidant activity. Thus, grapes as-harvested and grape extracts, especially those obtained from their seeds and pulp, have been reported to have health benefits, and accordingly, grapes and their derivatives are considered potential f...

Red grapes are rich in phytochemicals such as phenolics and flavonoids, which are strongly correlated with their antioxidant activity. Thus, grapes as-harvested and grape extracts, especially those obtained from their seeds and pulp, have been reported to have health benefits, and accordingly, grapes and their derivatives are considered potential f...

Lately, there is maximum concern in most states, all over the world, regarding the levels of pesticide residues in food products, considering their chemical properties with direct implications on human health. Many studies have shown that the adverse effects of cumulative exposure to multiple pesticide residues are far more severe than any single e...

Grapes occupy an important position in the human diet, providing both macronutrients, such as saccharides, and micronutrients indispensable for growth and development, such as vitamins and minerals. Grapes contain both enzymatic and non-enzymatic (nutritional) antioxidants, such as ascorbic acid and bioflavones. High amounts of these valuable compo...

Primary microplastics, known as microbeads (μBs), are found in personal care and cosmetic products (PCCPs) being used as an ingredient for physical abrasion on human body surface. Due to the fact that μBs have sizes less than 0.8 mm, sometimes even less than 0.1 mm, they can be ingested by many organisms, being transmitted in the food chain. The de...

The food industry is a high consumer of polymer packing materials, sealing materials, and engineering components used in production equipment. Biobased polymer composites used in the food industry are obtained by incorporating different biogenic materials into the structure of a base polymer matrix. Renewable resources such as microalgae, bacteria,...

Plasma electrolytic oxidation method was used to form ceramic coatings on pure Ti substrates, using various aqueous solutions of sodium aluminate (15 g/L and 20 g/L, with or without the addition of NaOH, 2 g/L). The PEO process was carried out at constant time and voltage (300 seconds, 200 V). The ceramic coatings obtained by PEO were investigated...

Chemical analysis was performed on sediment core samples collected from three salt lakes, Amara Lake, Caineni Lake, and Movila Miresii Lake, located in the northeast of the Romanian Plain. The concentration of 10 main elements, 6 heavy metals (HMs), 8 rare earth elements (REEs), and 10 trace elements (TEs)—determined using neutron activation analys...

Abstract: Graphite was oxidized to graphene oxide and activated by thionyl chloride, for further covalently linking three hydrazides with potential biological activity. The obtained materials were characterized by scanning electron microscopy with energy dispersive spectroscopy, Fourier-transform infrared and Raman spectroscopies. The presence of v...

The invention relates to an emollient cream for dry skin and its preparation procedure, with applicability in the cosmetic or dermatological field, mainly for anti-wrinkle purposes. The cream consists of 7% (volume/mass) hydroalcoholic extract from the skin/seed of Vitis vinifera L.,Fetească Neagră variety grapes, in a cream base consisting of a mi...

This study is the third in a series of investigations conducted by the authors, and certainly the most comprehensive research regarding the former uranium, copper, and charcoal mines from a particular geographical area of Romania. In this respect, the present scientific incursion focused on two areas containing former extraction uranium ore sites,...

The wastewater treatment process significantly decreases the negative impact of the effluent on human health compared to the influent. This probabilistic study, based on mathematical formulas, which does not involve clinical studies, investigates the impact of polluting chemical elements on health, which may be higher or lower, depending on other d...

Groundwater, which is the main source of water for human consumption in many rural areas, has its quality determined by the complex interaction of environmental factors and anthropogenic activities. The present study evaluated the quality of shallow groundwater (1 to 25 m depth) in the rural area of the Târgovişte Plain, a densely populated area (2...

Scope: Development of bio-based polymeric composites using algal biomass as filler, study of their physico-chemical and mechanical properties, and behavior under thermal, radiative and oxidative stress Bio-based polymeric composites are obtained by incorporating into the structure of the base polymer matrix different biogenic materials from renewab...

Heavy metals can reach into surface water mainly as a result of domestic and industrial activities. Copper, zinc, manganese, iron, etc. are just a few examples of heavy metals that are naturally present in soil and water, some are considered indispensable for life but, in high concentrations may become toxic. If external factors (domestic and indus...

The wastewater treatment process also includes the removal of heavy metals, which are characterized by high toxicity for the environment. In this study, the monitoring process of heavy metals (Cu, Ni, Cd, Pb, Zn) over a period of 91 days was described. The determinations were performed by flame atomic absorption spectrometry (FAAS) and graphite fur...

In this study, it was reported the preliminary results on the chemical and structural composition of decorative elements remains from original Roman mosaic fragments collected from the Roman Mosaic Museum, Constanta (Romania). These investigations were carried out by using non-destructive and micro-invasive techniques such as optical microscopy, X-...

In this study, it was reported the preliminary results on the chemical and structural composition of decorative elements remains from original Roman mosaic fragments collected from the Roman Mosaic Museum, Constanta (Romania). These investigations were carried out by using non-destructive and micro-invasive techniques such as optical microscopy, X-...

Chlorophyll-a is the pigment whose concentration is an important indicator for the development of microalgae biomass. This study aims at evaluating the concentration of chlorophylls in the biomass of granular activated algae, using acetone and 90% ethanol for the extraction procedures applied. Concentrations of chlorophyll a, b and c were determine...

In this paper was studied eight bivalve shells (with pigments traces) were collected from Cheia archaeological site (Eneolitihic site, dated between the end of the 6th millennium and the beginning of the 5th millennium cal BC, Romania), in order to establish correlations related to morphology, composition, longevity and belonging to the archaeologi...

The Scythian necropolis of Sâncrai (Alba County) was investigated in 2016, which led to the discovery of 95 burials (inhumation and cremation). The study of the tombs revealed a rich funerary inventory, composed mainly of ceramic vessels of different shapes and sizes; weapons such as akinakes daggers, spearheads, and arrowheads; ornaments including...

Problemele legate de conservarea descoperirilor arheologice excavate au cea mai mare relevanță astăzi. De cele mai multe ori, acestea au fost asimilate într-o manieră eronată, ca un amestec dintre o disciplină de cercetare (arheologie) și o profesie care urmărește păstrarea și îngrijirea obiectelor de patrimoniu (conservare). Conform acestui punct...

In this study, a resistive humidity sensor for moisture detection at room temperature is presented. The thin film proposed as a critical sensing element is based on a quaternary hybrid nanocomposite CNHox//SnO2/ZnO/PVP (oxidated carbon nanohorns–tin oxide–zinc oxide–polyvinylpyrrolidone) at the w/w/w/w ratios of 1.5/1/1/1 and 3/1/1/1. The sensing s...

The present paper is focused on the microclimatic investigation and weather-climatic phenomena matrix assessment, which can be generated for heritage objectives at different spatial and temporal resolutions, correlated with physicochemical analysis of the particulate matter (PM2.5-10). In the literature the importance of atmospheric PM monitoring i...

In this paper, we present the relative humidity (RH) sensing response of a chemiresistive sensor, employing sensing layers based on a ternary nanohybrids comprised of holey carbon nano-horns (CNHox), titanium (IV) oxide, and polyvinylpyrrolidone (PVP) at 1/1/1/ (T1), 2/1/1/ (T2), and with 3/1/1 (T3) mass ratios. The sensing device is comprised of a...

Food plants provide a regulated source of delivery of functional compounds, plant secondary metabolites production being also tissue specific. In grape berries, the phenolic compounds, flavonoids and non-flavonoids, are distributed in the different parts of the fruit. The aim of this study was to investigate the applicability of FTIR and Raman scre...

The use of natural ingredients with active functions has been intensively studied in the last years, as a consequence to consumer preferences for organic products. Application of circular economy principles determined a significant research activity in the viticulture field. The use or re-use of vines parts for so-called nutra-ceuticals or other co...

The relative humidity (RH) sensing response of a chemoresistive sensor using a novel ternary hybrid nanocomposite film as a sensing element is presented. The sensitive layer was obtained by employing the drop-casting technique for depositing a thin film of nanocomposite between the electrodes of an interdigitated (IDT) structure. The sensing suppor...

This paper presents the relative humidity (RH) sensing response of a resistive sensor employing sensing layers based on a ternary nanocomposite comprising graphene oxide-oxidized carbon nanohorns-polyvinylpyrrolidone (GO-CNHox–PVP), at 1/1/1, 1/2/1, and 1/3/1 w/w/w mass ratios. The sensing structure is composed of a silicon substrate, a SiO2 layer,...

We report the relative humidity (RH) sensing response of a resistive sensor, employing sensing layers, based on a quaternary organic–inorganic hybrid nanocomposite comprising oxidized carbon nanohorns (CNHox), graphene oxide (GO), tin dioxide, and polyvinylpyrrolidone (PVP), at 1/1/1/1 and 0.75/0.75/1/1/1 mass ratios. The sensing structure comprise...

The aim of this paper is to find out - for the first time - through archaeometric analysis the provenance of the Precucuteni-type pottery from Alba Iulia-Lumea Nouă settlement and whether it has a local origin or is an imported ceramic. The presence of so-called Precucuteni-type pottery in Transylvanian sites, decorated by motifs using excision tec...

This study aims to investigate a small wild cave, called Floriilor Cave, from the morphological structure and mineral composition point of view. This cave was accidentally discovered in 1991 and is currently closed to tourists; access is achieved only by the speleologists. The samples, including stalactites and stalagmites, rocks, and sediments, we...

This work attempts to show the usefulness of vibrational spectroscopy (i.e., FTIR and Raman) in the analysis of major components of the original structure materials of a heritage monument (Tropaeum Traiani, Adamclisi). The features of materials and indoor microclimatic variables (i.e., temperature and relative humidity), on the periods of the monit...

Metals concentrations of Cr, Ni, Co, Cu, Zn, Cd, and Pb in nettle (Urtica dioica) and soil samples, collected in April 2019 from several villages around Targoviste City, were determined. The samples were collected in the springtime (April 2019) when it is considered that the plants have reached the maturity and because inhabitants pick nettles for...

All water treatment plants (WWTPs) produce waste/residue known as sewage sludge (SS) during the purification of raw water. Typically, treatment procedures involve coagulation, flocculation, sedimentation, and filtration processes for removing colloidal as well as suspended solids from wastewater, then it follows chemical and biological processes. I...

The heavy metal concentration in plant tissues of Ranunculus ficaria, Plantago major, Taraxacum officinale, and Achillea millefolium, frequently consumed or used in traditional medicine, collected from one of radioactive area of Romania, not been previously reported by any research group. The content of Cr, Mn, Ni, Cu, Zn, Cd, Pb were determined by...

The therapeutic benefits of extracts obtained from different red grape fractions were thoroughly studied, however, data regarding the comparison of phytochemical extracts prepared from the same varieties coming from organic versus conventional management systems are rather lacking. The present study aimed at comparing some of the phytochemical char...

One of the most common problems encountered in everyday life is the pollution of the environment. Therefore, regardless of the nature of the daily activities of the population, this destructive effect of the natural balance finds its origin perhaps in the lack of capacity over time to treat the problem of waste (industrial and domestic) as it shoul...

Starting from isoniazid and carboxylic acids as precursors, thirteen new hydrazides and 1,3,4-oxadiazoles of 2-(4-substituted-phenoxymethyl)-benzoic acids were synthesized and characterized by appropriate means. Their biological properties were evaluated in terms of apoptosis, cell cycle blocking, and drug metabolism gene expression on HCT-8 and HT...

In this study, the chemical composition of Juglandis semen extracts obtained by different extraction solvents and methods, were determined by Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. The multivariate analyses: principal component analysis, k-means clustering and hierarchical cluster analysis of the FTIR and Raman spect...

Here we report on the results of the 2015 moss survey, when mosses were sampled at about 5,100 sites across Europe and beyond, either in 2015, 2016 or both. In 2015, reporting for metals has greatly increased from about 28 countries in previous surveys to 36 countries, mainly due to participation of more countries in the EECCA region. Nitrogen and...

The study aims a chemometric-based vibrational spectroscopy investigation, Fourier transform infrared (FTIR) and Raman spectroscopy, on the hydroalcoholic extracts obtained from four variety of red grapes (skin). The multivariate analysis, by combining both principal component analysis (PCA) and linear discriminant analysis (LDA) approaches (called...

Featured Application This article may serve as a database for other research into mosaics and, also, as a guide for what methods may be applied. Abstract The color characteristics, vibration spectra, phase and mineral composition, internal structural organization of several fragments of the ancient Roman mosaics from the Roman Mosaic Museum, Const...

The water quality from rural areas, south of Targoviste city (e.g., with limited access to water sources) is essential to ensuring the well-living conditions for inhabitants and for sustainer the economic activities, including tourism. In this study, a total of 20 water wells were selected in order to provide a better spatial distribution across th...

Heavy metal concentrations of Pb, Cd, Zn, Ni, Cr, Mn, and Cu in drinking water collected from capture groundwater stations were determined. These values were correlated with physicochemical indicators. Concentrations of all metals were lower than maximum admitted limits established by Romanian Law 311/2004. The health risk index values for all dete...

AISI 316 steel has good corrosion behavior and high-temperature stability, but often prolonged exposure to temperatures close to 700 • C in aggressive environments (e.g., in boilers and furnaces, in nuclear installations) can cause problems that lead to accelerated corrosion degradation of steel components. A known solution is to prepare alumina ce...

This study aims to demonstrate that the investigated sample is nickel-rich, a signature of the meteorites composed of iron, in order to establish if studied sample belongs or not to Campo del Cielo meteorite group. The discrete structure found in meteorites is a fingerprint fully justified by structural analysis using optical microscopy (OM) and sc...

The invention relates to a composite biomaterial made of hydroxyapatite HAp reinforced with strontium titanate SrTiO, having improved physical, chemical and mechanical properties, compatible with the biological medium, applicable in implantology and tissue engineering, being intended for bone substitutes capable to replace, partially or totally, da...

This study aims to investigate the chemical composition of nineteen painted pottery fragments belonging to Eneolithic Petresti culture, in order to establish a link between the ceramic artifacts and the potential clay sources identified in the proximity of the archaeological site. In this respect, two analytical techniques (attenuated total reflect...

This study is the first attempt to decipher the effect of particulate matter (PM) composition on people’s health and on historic sites, in correlation with the daily and seasonal microclimate monitoring of the indoor and outdoor areas of the Roman Mosaic Edifice museum (the maritime port of Constanta, Romania). More specifically, the increase of me...

Water quality is essential for ensuring humane living conditions for inhabitants around the world. In this context, an important aspect that must be taken into consideration is the water quality in rural areas. Special attention must be given in such cases due to a large number of possible pollution sources, from industrial or agricultural, to wast...

The archaeometric study of some samples from New gate TowerfromCorvins’Castle are analyzed in this paper in order to identify the raw materialsnature and weathering/deterioration processes of these artefacts. Modern analytical techniques, as XRD, FTIR, Raman, SEM-EDS, colorimetry, porosimetry, thermal analysis are used to evaluate the structure and...

For a better description and chronology of the liturgical art of the Russian-Lipovan community of Romania and, in view of correct attestation, a set of five icons presumed painted in the first half of the 19th century belonging to the patrimony of Antim Monastery (Bucharest) and One-wood Monastery (Valcea county), have been investigated by means of...

Characterization of several wild growing and cultivated mushrooms from geographical area of Dambovita County, Romania, in terms of enzymatic and non-enzymatic antioxidants, through a chemometrics approach, was the aim of this study. Related to the authors’ previous studies, the novelty of this paper consists in deepening research towards the comple...