SUBMICROSCOPICAL DATA ABOUT THE DIFFERENTIATION OF ELASTIC FIBRES IN THE AORTIC WALL

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THE ULTRASTRUCTURE OF ELASTIC FIBERS

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Andreas Vesalius (1514 - 1564) - the founder of modern human anatomy

Andreas Vesalius was a Belgian physician and anatomist, whose work revolutionised anatomy and contributed to enhancement of knowledge how the human body functioned. Vesalius was born in Brussels in 1514. He studied medicine and anatomy in Paris (1533-1536). He obtained a post of lecturer at the University of Padua and remained there as professor (1537-1542). His important innovations were to perform postmortem dissections and to make use of illustrations in the teaching of anatomy. In 1543 Vesalius published his revolutionary book De humani corporis fabrica (on the structure of the human body). Vesalius helped establish surgery as a separate medical profession. Scientific findings of Vesalius are in field of: skeletal system, muscular system, vascular and circulatory systems, nervous system, abdominal organs, heart, brain. Andreas Vesalius, died June 1564, island of Zacynthus (now in Greece)

Immunohistochemical Study Of Some Filamentous Proteins In The Cells Of Mature Human Umbilical Cord

Expression design of primary proteins from intermediate filaments such as cytokeratin, vimentin and desmin in any cells within the umbilical cord was immunohistochemically studied using polyclonal (PAN cytokeratin) and monoclonal (vimentin and desmin) antibodies. The results showed that the cells of the mature human umbilical cord such as amniocytes, cells of the mucilaginous connective tissue, endothelial and smooth-muscle vascular cells expressed the basic proteins of the intermediate filaments in a different way. The amniocytes reacted strongly positively towards cytokeratin while only single cells reacted towards desmin and vimentin. All  the cells of the mucilaginous connective tissue reacted positively for vimentin and desmin both. The vascular endothelial cells remained vimentin-positive only while the vascular myocytes demonstrated certain peculiarities of their reaction towards vimentin and desmin related not only with their vascular belonging (arterial or venous, respectively) but also with their intramural topography. Based on these new facts the authors discussed the nature, differentiation and functions of the structures involved in this important transitory formation

Study of the gingival health in children with crown restorations

Introduction: Prosthetic treatment with fixed constructions is an effective method for recovering severely destroyed teeth. The purpose of this study is to track the changes in the gingival tissues around teeth, which are prosthetically treated with different aesthetic crowns.Materials and Methods: Eighty-two teeth were studied with 46 of them being restored with CAD/CAM composite crowns and 36 with ready-made zirconia crowns. The assessment of the condition of the surrounding soft tissues was performed using the modified gingival index (MGI).Results: Slight gingival inflammation of the severely destroyed natural teeth (MGI - 1,25 ÷ 2,13) was reported, whereas after their restoration with crown constructions, healing processes and decreasing of the gingival index during the follow-up period occurred. The MGI, one year after placing the constructions, was 0 ÷ 1.44.Conclusion: CAD/CAM and ready-made zirconia crowns have excellent compatibility with surrounding soft tissues and do not disturb gingival health

Evaluation of emmer wheat genetics resources aimed at dietary food production

Emmer wheat cultivated by organic farmers is used as a component of some bio (organic) food products. Its positive influence on consumer health is caused by grain composition. In the set of 8 emmer wheat accessions, the main grain components, bread making characteristics and contents of health supporting chemical substances such as total dietary fibre content and its components, content of total polyphenols plus catechin and ferulic acid contents, vitamins of the B group and E plus total content of carotenoids were evaluated by standard methods

A clinical case of perforation of the maxillary sinus membrane during sinus lift surgery and a proposed methodology for the management of subsequent complications

INTRODUCTION: Bony projections on the inner surface of the maxillary sinus are divided into two main groups: exostoses, which are rounded bone structures, and septa, defined as having a pointed end. Bony septa are common anatomical structures and can lead to complications during sinus augmentation procedures.MATERIALS AND METHODS: The study reports a clinical case of a vertical partial basal bony septum, where upon elevation of the sinus membrane, its perforation was observed (size >5 mm).RESULTS: The present study proposes a method of treatment of perforated sinus membranes.The post-surgical period was uneventful. The bone grafting material remained compact in the sinus augmentation site.CONCLUSIONS: The proposed method for the management of perforated sinus membranes can be applied in surgical procedures for perforations > 5 mm in size

Synthesis and characterization of mixed oxides derivate from Li modified Mg-Al hydrotalcites

Lithium modified Mg/Al hydrotalcite-like samples with different Li content were synthesized using co-precipitation followed by calcination at 500 °C. The samples were characterized by means of XRD, DRIFTS, SEM-EDS, LDPSA and MIP. Results from this study indicated that the addition of Li modifier influences the change in structural, textural and morphological characteristics, more pronounced in samples with higher lithium content

Effects of preparation conditions on the catalytic activity of chicken eggshell catalysts for the transesterification of oils to biodiesel

Eggshell based catalysts were synthesized by calcination (600 and 900 ºC, 4 h) of raw and rehydration (RH) modified (RH-temperature of 80 ºC, S/L ratio of 1/5, and RH-time of 6 h) eggshell. After RH-treatment, the sample underwent calcination at 600 ºC, 4 h. Obtained catalysts were characterized by XRD, SEM, N2-physisorption, and Hg-porosimetry, whereas the catalytic activity was analyzed in a batch reactor (reaction temperature of 60 ºC, sunflower oil/methanol molar ratio of 1/12, and catalyst concentration of 4 wt.%). The concentration of fatty acid methyl esters (FAMEs) was determined by HPLC. The reaction has reached equilibrium (FAME > 97%) with rehydrated catalyst for 1.5 h, whereas with catalyst calcined at 900 ºC for 4 h