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This paper complements the data published thus far about species of the nymphalid family with data collected in Romania’s eight regions between 1887 and 1984 and elsewhere in Europe (Austria, Germany, Croația, the Republic of Moldova, Serbia and Switzerland), including the date and the site of original collection. For the first time, this research presents the collecting information of the species held in the entomological collection of the Museum of Natural History in Sibiu. It identifies the species of the nymphalid family in six of the museum’s lepidoptera collections. These collections are of extraordinary interest not least because they are associated with natural scientists of European renown, such as Daniel Czekelius, Eugen Worell, Viktor Weindel, Rolf Weirauch, Heinrich Hann von Hannenheim and Eckbert Schneider. The analysis, cataloguing, centralisation and updating of the nomenclature resulted in a number of 1,865 specimens from 49 species and fifteen genera (of the 90 referenced in Romania’s fauna): Aglais, Apatura, Araschnia, Argynnis, Brenthis, Boloria, Euphydryas, Inachis, Issoria, Libythea, Limenitis, Melitaea, Neptis, Nymphalis and Polygonia. Data published in a previous article add 101 specimens from the Vanessa genus.Most species originate regionally from the nine counties of Transylvania followed by Oltenia and Moldova (three counties each), Banat and Dobrogea (two counties each), Crișana, Satu Mare and Muntenia (one county each) and the capital of Romania, Bucharest. The species presented in this paper also include the extinct taxon Polygonia egea (Cramer, 1775), Eugen Worrell collection and three species that are endemic to Romania: Melitaea retyezatica Diöszeghy, 1930, Argynnis pandora dacica Hormuzaki, 1892, Daniel Czekelius collection and Boloria pales ([Denis & Schiffermüller], 1775) carpathomeridionalis Crosson et Popescu-Gorj, 1963, both in the Viktor Weindel collection.

The knowledge, perception, and behavior of young people toward ecotourism are important for the sustainable development of this sector. The purpose of this research is to evaluate and analyze the knowledge of young Romanian students about ecotourism and the main ecotourism destinations in Romania, their behavior in relation to the practice of this form of sustainable tourism at the local level in the last 2 years (2020 and 2021), and people’s use of the Internet for planning holidays and digital applications while traveling in nature. A quantitative research was conducted based on a self-administered questionnaire, structured in 13 sections on ecotourism, to which were added the sociodemographic data of the respondents. The conclusions of the research are that young people know well the main ecotourism destinations in Romania; they choose them according to the beauty of the landscape, multitude of outdoor activities, and the hospitality of the hosts. In the last 2 years of the pandemic, young people have visited several times the main existing ecotourism destinations locally, with an average vacation duration of 1–3 days. The Internet remains the main source of information, and in the field, they use mobile applications that allow the download of digital maps and recognize different plant species. By integrating various activities in nature, in close connection with the local culture, ecotourism can contribute to the sustainable use of local tourism resources. This study provides a detailed and realistic picture of the knowledge and the type of ecotourism experience that young people want. The implications are theoretical and managerial, highlighting the importance of assessing the preferences of young ecotourists, as a basis for developing ecotourism strategies, sustainable use of local tourism resources, and management of protected areas.

This scientific paper examines the impact of climate change on the spread and survival of the invasive species Corythucha arcuata Say, 1832 (oak lace bug, or OLB) in Romania. The OLB is native to the Eastern USA and Canada, and in its native habitat, it coexists with minimal impact to the preferred host plant species Quercus. However, in Europe, the OLB in high density causes early defoliation, slowing tree growth. As Quercus spp. is a keystone species, the impact of the OLB on European forests is significant. This paper aims to address several gaps in knowledge about the OLB by presenting findings from a study conducted by the Lucian Blaga University of Sibiu (ULBS) in Romania. The study identified the species’ chronology of spread, ecology, ethology and biology of the species, in addition to foliage classification to determine the extent of attack. The study found a direct link between the temperature and the speed of the generational lifecycle. The findings support the thesis that climate change is enabling the healthy, rapid density growth of OLB, which is a danger to the Quercus spp. Further research is needed in the area of the thermal tolerance of the OLB, and the research conducted by the ULBS represents the first documented research into the thermal constant of the insect. The paper concludes that further research must be in the direction to understand how and where these insects survive during winter to find future management measures and identify chemical or biological methods as solutions to eradicate and stop the expansion of the invasion of the OLB, and the potential consequences for the Quercus sp.

In this work, we estimated reproducibility and procedures to improve the selectivity of the method and to determine the influence of different analytical parameters (pH, electrolyte composition, deposition time and potential, presence of ligands). Detection limit of copper in samples of white wine and red Blaj (Romania) is 2.4 ppm, with a deviation of 1.5-2,0%. The results were compared with the results by atomic adsorption classical method. The sensitivity of the method is two times smaller, Daton this Pb2- ions.

This paper present a vision about the possibility to speed up the conversion process to an ecological agriculture in Romania. The link from ecological products consumer and ecologic agricultural producer is also explained from point of view of certification process. Presenting the consumer mentality and principles and rules of organic farming and certification can open the way to a sustainable and ecological agriculture.

Environmental policy assigns an important role to water management, given both the protection of natural resources and the reduction of environmental impact. Wastewater management is based on the following principles: minimizing wastewater generation, wastewater must be recirculated to reduce costs, wastewater can be recirculated by separation and treatment for reuse and recirculation of treated products (both water and oil). Within the Wastewater Treatment Plant from Dumbrăveni, Sibiu County, wastewater treatment is performed through the most appropriate technologies, minimizing reuse / recirculation, and minimizing the cost of operations. Through this paper and following the analyses performed on samples collected during January-August 2021, we concluded that moderate loads of the influent lead to a treatment efficiency of 94.35% in the analysed wastewater plant. [ABSTRACT FROM AUTHOR]

Within the Agnita domestic wastewater treatment plant, the treatment process takes place in the biological treatment plant with rotating biological contractors. The Agnita wastewater treatment plant is designed for a relatively small number of inhabitants (9500 LE) and only the elimination of organic and suspended matter was considered in its construction. In this study, the main parameters for characterizing the quality of wastewater were determined, treated with classic coagulant, ferric chloride min. 40% in different quantities, in the flow distribution chamber before the biological stage. The obtained results show that the Agnita Wastewater Treatment Plant is functioning properly, and the treated water meets the quality conditions imposed by the rules in force on water and environmental protection. [ABSTRACT FROM AUTHOR]

The present study aimed at an experiment related to environmental management in the city of Sibiu, by carrying out sound measurements at the most important points in the city. The field data collection took place from January 15 to February 15, 2020. We used three digital sound level meters (PeakTeach 5175, GLX-explorer, Voltcraft SL 50) provided by the environmental chemistry laboratory of our faculty. The results obtained from the measurements were aimed at identifying the maximum and minimum values as well as knowing the areas in the city which were most exposed to noise pollution. [ABSTRACT FROM AUTHOR]

The present study is part ofa much larger research that took place over two years in a corn crop in the commune of Apoldu de Jos (Sibiu, Romania), starting from the idea that the same production can be obtained, only by fertilizing with urea in the preparation of the germination bed, and not when ammonium nitrate is applied in two passes, sowing and during the growing season of the crop. The present paper aimed to determine the green index by performing measurements in different phases of crop vegetation, correlated with the administration of urea and ammonium nitrate fertilizers, to the two experimental plots of corn V i and V.' using the device Crop Circle ACS-430, held by the Faculty of Agricultural Sciences, Food Industry and Environmental Protection within the Lucian Blaga University of Sibiu. [ABSTRACT FROM AUTHOR]

The researches of the present work were carried out within an apiary in Bazna village, Sibiu County, where the obtained honey assortments were subjected to laboratory analyses. The hive exploits have 220 families of bees, of which 80 are maintained in the horizontal hive system and 140 in the vertical hive system. In order to certify the Bazna honey, a series of preliminary analyses were carried out, which consisted in the determination of water content, dry substance, acidity index, conductivity, pH and a diastatic index. In this paper the importance of bee honey was highlighted and we demonstrated the qualities of the four honey assortments analysed. The analyses also certified the originality and naturalness of each assortment, the absence of forgeries or any artificial intervention of the beekeeper. [ABSTRACT FROM AUTHOR]

The present study has started from the idea that the same production can be obtained, fertilizing once with the urea incorporated in the preparation of the germinative bed, as when ammonium nitrate is applied in two passages, in the sowing and in the vegetation. In our study, we analyzed the com crop response to the two fertilization schemes with 200 kg/ha of urea (96 kg N ha/ha) in the preparation of the germinating bed in parallel with the fertilization in two phases of nitrate ammonium, 150 kg in the preparation of the germinative bed, respectively 125 kg/ha applied after about one month (96 kg/ha to N). Applying this fertilization scheme would allow farmers to reduce the number of crops applied to maize crops and reduce fertilization costs. [ABSTRACT FROM AUTHOR]

This paper fills the gap in the literature of applying an exponential smoothing model in the oil shipping market forecasting. The author refines the adaptive combined model with B-criterion based on Brown's model with modification by Trigg and Leach. Forecasting the values of the average time-charter equivalent of a tanker along 6 different routes of oil transportation in the world ocean during the crisis period 2015–2019. The accuracy of the proposed method is superior to naive, autoregression methods and machine learning models in all used error metrics. The obtained accuracy in 71% of cases is available for commercial use by operators and charterers of the tanker fleet.

The separations has the base on the osmotic phenomenon and they proved the reliability and the applicability in last recently, in all many maul branches of the industries. In present the constructive solution, continue this line opening a new horizon in the area physical and chemical analyses. According to the results, preliminary tests have shown a very good accuracy compared with the classical method of drying heat. [ABSTRACT FROM AUTHOR]