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Gabi Mirela Matei, Sorin Matei, Adrian Matei and Elena Draghici

Abstract

Lactic acid bacteria are frequently utilized in food industry and they are also recognized as antimicrobial agents due to their capability to produce metabolites such as: organic acids, biosurfactants, bacteriocins, hydrogen peroxide, cyclic dipeptides, exopolysaccharides. The main goal of this paper was to present the results of the research carried out on the strain LCM2 of lactic acid bacteria isolated from brined cucumbers, for production of biosurfactants and to assess its antifungal properties. The emulsification capacity of biosurfactant was measured using kerosene as the hydrophobic substrate. The value of emulsification index E24 was 89.04% showing a high emulsification activity of the biosurfactant. The structural characterization of biosurfactant by TLC revealed its glycolipidic nature. Assay of the ionic charge established the anionic charge of the biosurfactant revealed by the presence of precipitation lines towards the cationic surfactant dodecyl-dimethyl-ammonium chloride. The biosurfactant presented antibiofilm activity with low adherence capacity, structural damages of the hyphal net, conidiophores and delays or lack of sporulation and decreased biomass accumulation in four mycotoxigenic Penicillium and Aspergillus isolates. Results of in vitro assays recommend the biosurfactant produced by the new lactic acid bacteria strain LCM2 for biotechnological purposes, as alternative antifungal agent in food industry.

Open access

Gabriela Manea, Elena Matei and Adrian Tiscovschi

Preliminary case study on the environmental quality and life quality in the Romanian rural rudimentary communities

In the present study, our intention is to reveal the positive and negative aspects of living, in the rural communities appearing in Romania in the last 5-6 decades; often, these have occupied territories with astonishing natural landscapes, situated close to large rural settlements with a century-old history. If, from the perspective of the quality of the natural components of the environment, inside the perimeter of these settlements we can talk about extremely favorable habitat conditions, from the perspective of the access to utilities and technical facilities, we can identify a primitive, rudimentary lifestyle, whose only goal is most oftenly, the access of the minimum resources for subsistence. This case study has been made on two communities, situated at the contact between the Subcarpathians of Arges and the Iezer-Papusa and Leaota Mountains, respectively: the Gura Pravat village, a formal settlement, which extends along the left bank of the Argesel river, north of Namaiesti tourist village and an informal village situated on the left bank of the Dambovita river, inside the Complexe Reserve Cheile de la Cetateni.

Open access

Matei–Ionuţ Dragomir, Adrian Cosmin Stîngă and Alina Dragomir

Abstract

The ecosystems from the Special Protection Area ROSPA0071 „Lower Siret Meadow” (36492 ha, between Adjud city, Vrancea County and Şendreni village, Galaţi County) in the analysed sector (sixteen sample surfaces) present a scientific interest because of the geographical, ecological and biological characteristics. The paper treats details such as the number of individuals, the spatial distribution, availability of suitable habitats and threats, necessary data for the evaluation of the conservation status. We present the data obtained in the period 2010–2014 from 64 field visits in the Special Protection Area ROSPA0071 „Lower Siret Meadow”, all made in the hiemal season. The observations were made as an activity of monitoring the protected bird species distribution and habitat selection of wintering populations. Five important sites were identified as being used by wintering birds here. During the monitoring actions, eighty–one bird species were identified. The paper brings new data about the way birds use their range and existing habitats for wintering.

Open access

Gabriela Manea, Elena Matei, Iuliana Vijulie, Marian Marin, Octavian Cocos and Adrian Tiscovschi

Abstract

This paper intends to demonstrate on the basis of a case study that rural people’s access to modern goods and services is not necessarily a relentless source of deculturalisation, because it sometimes allows a better management and valorisation of the main characteristics of the rural space. Despite socio-economic unrest and successive changes of political regimes that took place in Romania during the last century, the human communities within the Arges foothills have defended with dignity their traditional material and spiritual values, passing them down from generation to generation. In the medium and long-term, the valorisation of the Romanian rural space, in general, and of that belonging to the Arges foothills, in particular, will imply the creation of a balance between the valuable cultural potential and the quality of life of the inhabitants, who are the keepers of rural cultural heritage. At present, the best thing to do to pass on the traditions of this area is to proudly accept the affiliation to this geographical space. This is true not only for the permanent inhabitants of rural settlements, but mostly for those who have left the countryside to carry it in their minds and souls. In our opinion, this fact is a pre-requisite for preventing the loss of material and spiritual values of this cultural-historical space.