https://uav.ro/jour/index.php/stb-cfse/issue/feedScientific and Technical Bulletin, Series: Chemistry, Food Science and Engineering2025-06-14T10:33:16+03:00Dana M. Copolovicidana.copolovici@uav.roOpen Journal Systems<p class="m-4249321307608718142msoplaintext" align="center"><strong>Print Edition ISSN-L: 1582-1021</strong></p> <p class="m-4249321307608718142msoplaintext" align="center"><strong>Web Edition ISSN: 2668-4764 (on-line)</strong></p> <p class="m-4249321307608718142msoplaintext" align="center"><strong> </strong></p> <p class="m-4249321307608718142msoplaintext" align="center"><strong>Scientific and Technical Bulletin, Series: Chemistry, Food Science and Engineering </strong>(STB-CFSE) is an annual peer-reviewed, open access journal edited by Faculty of Food Engineering, Tourism and Environmental Protection, "Aurel Vlaicu" University from Arad.</p> <p align="center"> </p> <p align="center"><strong> </strong></p> <p class="m-4249321307608718142msoplaintext"><strong>Scientific and Technical Bulletin, Series: Chemistry, Food Science and Engineering </strong>publishes short communications, original research articles, and mini-reviews in all fields of chemistry, physics, biology, engineering, materials science and medicine dealing with biological/synthesized materials. The scope covers research which combines all the modern techniques and principles used for the description of biological and synthesized products and their functions and properties. Also covered are the design and development of new procedures/products, the implementation of biological/synthesized components and systems, the design of biocompatible objects and systems and the use of modern technology to support biotechnological processes. </p> <p class="m-4249321307608718142msoplaintext"> </p> <p><strong>The main topics of interest are:</strong> research and education in chemistry, physics, biology, food science and engineering, environmental science and engineering, materials science and medicine, sustainability devine</p>https://uav.ro/jour/index.php/stb-cfse/article/view/2358PREMISES FOR SUSTAINABLE ENTREPRENEURIAL DEVELOPMENT OF EASTERN PARTNER COUNTRIES2025-06-13T11:56:38+03:00Simona GAVRILASsimona.gavrilas@uav.roRadu-Lucian BLAGAr.l.blaga@yahoo.conFlorin-Lucian ISACf.l.isac@yahoo.conVanina-Adoriana TRIFANv.a.trifan@yahoo.conOana BRINZANo.branzan@yahoo.conEugenia TIGANe.tigan@yahoo.con<p>Culture and entrepreneurship are complex and interrelated social concepts. The paper aims to<br>determine the importance of national culture for entrepreneurship progress in the Eastern Partnership (EaP) region. The<br>article focuses on a meta-analysis of the inputs integrated into a European Union Policy Index. It aimed to underline the<br>nature of specific interrelation mechanisms of the cultural dimensions that could contribute to developing a performant<br>entrepreneurial environment. The correlation analysis used in the paper detects the most ”sensitive” pairs of variables<br>related to national culture and entrepreneurship activities. Results show a highly significant relationship between the<br>Motivation Towards Achievement and Success index and a large part of the dimensions of the sustainable entrepreneurial<br>development of EaP countries, especially Internationalization and Support Services for Small and Medium Enterprises<br>SMEs and start-ups. Another significant relationship is between Individualism and the Development of Entrepreneurial<br>Activities in the analyzed countries.</p>2025-06-14T00:00:00+03:00Copyright (c) 2025 Scientific and Technical Bulletin, Series: Chemistry, Food Science and Engineeringhttps://uav.ro/jour/index.php/stb-cfse/article/view/2359PARTICULATE MATTER (PM1, PM2.5, PM10) MONITORING IN INDOOR AND OUTDOOR ENVIRONMENTS AT "AUREL VLAICU" UNIVERSITY OF ARAD, ROMANIA2025-06-14T09:59:38+03:00Dorina Rodica CHAMBREdorinachambree@yahoo.comAndreea-Corina MARCUa.c.marcu@yahoo.conLorena Aliana IOTCUl.a.iotcu@yahoo.conLucian Octav COPOLOVICIl.o.copolovici@yahoo.con<p>The presence of particulate matter, along with other specific air pollutants, significantly contributes to the degradation of air quality outdoors and indoors. High concentrations of PM in indoor educational spaces influence students' health and daily performance. This study presents the results of daily monitoring of PM1, PM2.5, and PM10 concentrations carried out between May 9 and May 15, 2024, at 8:00, 10:00, 12:00, 14:00, and 16:00 in various indoor environments of the M University Complex at "Aurel Vlaicu" University of Arad, including two corridors, two student laboratories, and an auditorium, as well as in the outdoor environment.</p>2025-06-14T00:00:00+03:00Copyright (c) 2025 Scientific and Technical Bulletin, Series: Chemistry, Food Science and Engineeringhttps://uav.ro/jour/index.php/stb-cfse/article/view/2360ASSESSMENT OF SURFACE WATER QUALITY IN JIU VALLEY MINING AREA2025-06-14T10:05:00+03:00Delia Gligordelia.gligor@ubbcluj.roCarmen ROBAc.roba@yahoo.conLiliana MANULESCl.manulescu@yahoo.con<p>The main objective of the present study was to perform a general screening of surface water quality in Jiu Valley mining rea. Surface waters were collected from West Jiu river and some of its tributaries (Caprisoara creek; Baleia creek; Barbateni creek; Vacii Valley creek; Tusu creek; Bulzu creek) to analyze several general physico-chemical and some specific chemical quality parameters. The general physico-chemical parameters: pH, redox potential (ORP), salinity, total dissolved solids (TDS), electrical conductivity (EC) and dissolved ions were analyzed.<br />The analyzed water samples had a neutral pH, with a relatively low content of dissolved salts, except for Caprisoara creek. Based on their dissolved ions content, most of the analysed waters correspond to Ist quality class, which reflect a very good ecological status. Because of the high content of sulphate, calcium and magnesium, water sampled from Caprisoara creek corresponds to Vth class (based on SO42- content), IVth class (Ca2+ level) and IIIrd (Mg2+ concen-tration) class, indicating a bad / low / moderate ecological status. The water quality degradation of Caprisoara creek in the investigated area may be associated with several anthropic activities identified in the area, but to confirm this sources further investigations are needed.</p>2025-06-14T00:00:00+03:00Copyright (c) 2025 Scientific and Technical Bulletin, Series: Chemistry, Food Science and Engineeringhttps://uav.ro/jour/index.php/stb-cfse/article/view/2361BIOSYNTHESIZED GOLD NANOPARTICLES FROM HEDERA HELIX BIOMASS WASTE2025-06-14T10:14:44+03:00Cristian MOISAmoisa.cristian@yahoo.comCristina Laura POPAc.l.popa@yahoo.conAndreea Ioana LUPITUa.i.lupitu@yahoo.conLucian COPOLOVICIl.o.copolovici@yahoo.conDana Maria COPOLOVICId.m.copolovici@yahoo.con<p>Hedera helix is an evergreen perennial vine plant often pruned for ornamental or ecological purposes.<br />This process generates a significant amount of biomass waste. Therefore, this study aimed to use this biomass to obtain<br />extracts rich in phenolic compounds and as a mediator for the biosynthesis of gold nanoparticles (AuNPs). Biochemical<br />assays (DPPH, FRAP, Folin–Ciocalteu, and colorimetric determination of total flavonoid content) revealed that the<br />extracts have significant radical scavenging activity and moderate phenolic and flavonoid compound levels. These<br />findings were further supported by UHPLC analysis, providing insight into the chemical composition of these extracts.<br />Only the most efficient extract (water infusion) was further used for AuNPs synthesis in three different synthesis<br />medium concentrations of HAuCl<sub>4</sub> (0.5, 1, and 2 mM). Visual and UV-Vis spectroscopy analyses revealed the successful<br />formation of AuNPs, while SEM-EDS analysis confirmed the morphology (spherical and polydisperse nanoparticles)<br />and elemental composition. The antimicrobial activity was evaluated through the broth microdilution method against<br />five microbial strains (Staphylococcus aureus, Escherichia coli, Salmonella typhimurium, Pseudomonas aeruginosa,<br />and Candida albicans) and two antibiotics (penicillin and gentamicin). The resulting bacterial inhibition rate (BIR%)<br />revealed a low inhibitory activity for AuNPs, significantly lower than for the tested antibiotics. It suggests that further<br />AuNPs functionalizations may be required to increase their biological activity</p>2025-06-14T00:00:00+03:00Copyright (c) 2025 Scientific and Technical Bulletin, Series: Chemistry, Food Science and Engineeringhttps://uav.ro/jour/index.php/stb-cfse/article/view/2362LATEST PROGRESS ON LUMINESCENT HOMO- AND HETEROPOLYMETALLIC METALLOMESOGENS BASED ON d-BLOCK METAL COMPLEXES2025-06-14T10:20:46+03:00Carmen CRETUcretucarmen@acad-icht.tm.edu.roEvelyn POPAe.popa@yahoo.conElisabeta I. SZERBe.szerb@yahoo.con<p>Luminescent liquid crystalline metal complexes are attractive multifunctional materials due to their great<br>potential of applicability in a wide range of domains from technological to medical fields. This review is focused on the<br>luminescent homo– and hetero–polymetallic metallomesogens containing d-block metal ions and different mono and<br>polydentate ligands published in the last ten years highlighting their ability to self-assembly in ordered lamellar or<br>columnar phases according to their molecular structure. The luminescent properties in solution, solid and liquid<br>crystalline states are also discussed</p>2025-06-14T00:00:00+03:00Copyright (c) 2025 Scientific and Technical Bulletin, Series: Chemistry, Food Science and Engineeringhttps://uav.ro/jour/index.php/stb-cfse/article/view/2363SYNTHESIS, STRUCTURAL AND PHOTOPHYSICAL PROPERTIES OF A NEW DITOPIC TERPYRIDINE-BASED PROLIGAND BEARING DISELENIDE UNITS2025-06-14T10:25:10+03:00Adelina ANDELESCUa.andelescu@yahoo.conEvelyn POPAe.popa@yahoo.conElisabeta-Ildyko SZERBe.szerb@yahoo.con<p>The present paper describes the synthesis and characterization of a new ditopic proligand with two terpiridines linked by a diselenide unit, obtained by a Steglich esterification procedure between a biscarboxylic acid functionalized with a diselenide unit and 4-([2,2':6',2''-terpyridin]-4'-yl)phenol. The compound was characterized by FT-IR, NMR (1D and 2D) and UV-Vis spectroscopies and ESI-MS analysis. Moreover, the photophysical properties of the ditopic ligand were investigated in freshly prepared dichloromethane solution. The compound was found to be emissive with a maximum centered at 354 nm.</p>2025-06-14T00:00:00+03:00Copyright (c) 2025 Scientific and Technical Bulletin, Series: Chemistry, Food Science and Engineering