ANATOMICAL ASPECTS OF THE STEM AND LEAF OF SENECIO GRANDIDENTATUS LEDEB. (ASTERACEAE)

The paper presents anatomical aspects of the stem and leaf of an endengered plant, growing on sandy coastal beaches and loessoid sea-cliffs Senecio grandidentatus Ledeb. It was observed that the root has a secondary structure, due to the phelogen and cambium activity, The stem has a one-layered epidermis, covered by cuticle, a differentiated cortex and a large number of collateral vascular bundles, most of them with xylem secondary structure due to the cambium activity. The leaf has a homogenous mesophyll and is amphistomatic. Long and densly non glandular hairs are present in the stem and leaf. The mechanical tissue is represented by sclerenchymatous fibers and tangential collenchyma in the in the stem and collenchyma tissue in the leaf

The Impact Study of the Exchanges between the Microorganism Communities on the Surfaces from Constanta Roman Mosaic and Anthropic Interactions

The constituent elements of the Roman Mosaic from Constanta are damaged under the activities of microorganisms present both on surfaces and in the airborne microbes. The predominance of microorganisms on the different surfaces of the edifice has led to multiple damage such as discoloration, pigmentation, wall degradation and exposed ceramic objects. Through this study we aimed to invest the diversity of microorganisms on the various substrates and levels as well as microclimate conditions. From the samples collected there were isolated and identified microorganisms, many of them with pathogenicity risks for staff and visitors. Thus, for the improvement of the surrounding conditions of the Roman Mosaic exhibition room, the need for management is aimed at reducing the microbial contaminations, based on understanding the changing conditions in the microclimate and decreasing the damage biofilm. Our study can be seen in a broader procedural in the current COVID-19 pandemic conditions

Technical - Experimental Methods Used in Artworks’ Expertise

The works of art analyzed in this research study are part of the Ovidius University Gallery collection that ensures the permanent visibility of the research results consisting in the experimental synergistic method as well as the innovative materials intended for restoration and conservation. We are sure that after the scientific investigation, the authentication and restoration of these works of art will increase their value. The synergistic methodology, to which we refer, can be defined as a sum of methods and procedures in the trans- and interdisciplinary field, which introduces the notion of “health” in the field of restoration artworks, changing the paradigm of approach as a whole, analyzing pigments, supports and all the specific painting materials. Nondestructive analytical procedures will be implemented to develop and optimize the conditions for identifying the individual types of biological impact present in works of art and of case studies on real samples. In the research activity, we used the different techniques to investigate and characterize traditional organic binders used in works of art, to see the effect on the consolidation and durability of materials, to test their functionality and usefulness while validating a viable laboratory model in relation to the natural system