Описание клинических случаев меланомы кожи

Skin melanoma is a malignant tumor originating in the cells of the melanocytic system, which is characterized by an aggressive clinical course, significant metastatic potential and unfavorable prognosis. These features of the tumor stipulate the need to improve measures to optimize early diagnosis of tumors. The article presents cases of pigmented skin melanoma to demonstrate the variability of clinical manifestations of this tumor requiring dermatologist skills in the differential diagnostics of neoplasms.Меланома кожи - злокачественное новообразование, происходящее из клеток меланоцитарной системы, характеризуется агрессивным клиническим течением, значительным метастатическим потенциалом, неблагоприятным прогнозом. Данные особенности опухоли указывают на необходимость совершенствования мер по оптимизации ранней диагностики новообразования. Описаны случаи пигментной меланомы кожи с целью демонстрации вариабельности клинических проявлений данного новообразования, требующих от врача-дерматолога навыков его дифференциальной диагностики

Lampenflora of Lipska Cave, Montenegro

The composition of phototrophic and microfungal communities in the Lipska show cave has been studied. Species were identified from 12 areas containing visible lampenflora, localized throughout the cave, and from 8 sites within the illuminated zone of the cave's natural entrance. Relative occurrence and relative abundance were calculated for the species detected. In total 29 phototrophic species were identified, including 17 species of algae and cyanobacteria, and 12 bryophyte species. Cyanobacteria were the dominant group of phototrophs within the composition of the lampenflora communities. Leptolyngbya tenuis and Gloeocapsa compacta dominated in the lampenflora communities, whereas L. tenuis and Chroococcus minutus had the highest abundance in the natural entrance zone. The dominant species of green algae both in the natural entrance zone and within the lampenflora communities were Stichococcus bacillaris and Chlorella vulgaris. Fissidens taxifolius and Brachythecium tommasinii dominated in the composition of the lampenflora communities, while Entodon schleicheri and Tortella sp. had the highest abundance in the natural entrance zone. Additionally, 19 species of microfungi were identified, with Penicillium chrysogenum and P. purpurascens considered as the dominant species in the composition of the lampenflora, with P. simplicissimum and Fusarium solani dominating in the natural entrance zone. It is presumed that the further development of lampenflora communities should proceed in line with an increase in the number of mosses. © British Cave Research Association 201

Biodiversity of Fungi in the photic and aphotic zones of Montenegro caves

For the first time, the composition of micromycetes communities was investigated in both photic and aphotic entrance zones of seven caves in Montenegro: Obodska Pećina, Golubinja Pećina, Veluštica Pećina, Vrbacka jama, Jama ER-1, Njegoš Pećina, and an unnamed cave. In total, 72 species of micromycetes were identified: 46 species from illuminated photic zones of the caves, including 43 species on phototrophs, 10 species from the air, 15 species on substrates, and 50 species from unlit aphotic zones, including 35 species from the air and 37 species on substrates. The most frequently isolated species were Acrodontium salmoneum, Aureobasidium pullulans, Cladosporium oxysporum, Mucor racemosus f. racemosus, Penicillium chrysogenum, and Rhizopus stolonifer. The similarity between micromycetes composition of different biotopes was evaluated using the Jaccard index and cluster analysis. The greatest similarity was observed in the communities isolated from the air of the photic zones of the caves. © 2020, Springer Nature B.V

Conditions for the realization of the idea of future teachers’ lifelong learning

Introduction: This article discusses the problem of the realization of the idea of future teachers` lifelong education in modern sociocultural space.Methods: The research methodology includes hermeneutic, systemic, comparative methods.Results: The idea of lifelong education will be successfully realized subject to a number of conditions: orientation to the philosophical training of future teachers, the quest for a dialogue of cultures, a harmonious coexistence of confessions, the formation of information culture and successful informational socialization of the younger generation.Conclusion: The formation of a lifelong education system is an adequate response to a society of changes. The mission of modern education is to train teachers capable of realizing this idea. Compliance with the conditions analyzed in this article will allow the harmonious introduction of lifelong learning into the people’s everyday life

Morphometric analysis of diffuse endocrine system's components in esoph-agogastroduodenal zone in different periods after cholecystectomy

The examination of morphofunctional features of esophagus, stomach, and duodenum as well as the role of diffusive endocrine system's cells in development of esophagogastroduodenal zone in patients without gallbladder is the purpose of the study. 80 patients with various periods after cholecystectomy and 72 patients with cholelithiasis were examined. Endo-scopic, histological and immuno-histochemical studies were carried out against all examined patients. The amount of epitheliocytes producing motilin (EC2), glucagon (L), and pancreatic polypeptide (PP) in duodenum were determined using antibodies sets. Esophagitis, atrophic- and reflux-gastritis, duodenal reflux are positively rather frequently met, atrophy and dysplasia of gastric mucous membrane increase in patients without gallbladder during the time after cholecystectomy. Hypoplasia of epithelial cells producing motilin, glucagon and pancreatic polipetide progresses. The development of duodenal and gastroesophagial reflux is associated with hypoplasia of epithelicytes producing motilin; the development of erosive changes is connected with hypoplasia of L and PP cells; the development of atrophic changes is closely related with hypoplasia of all studied cell types. The decrease of hormone producing epythelicytes promotes initiation and persistence of morphofunctional changes in esophagogastricduodenal zone. And this in turn can serve as additional diagnostic and prognostic criterion

Impact of global climate change on ecosystem functions of African countries

Based on a global spatial mathematical model of the global carbon cycle in the biosphere, the change in environmental parameters caused by carbon dioxide emissions from fossil fuel combustion, deforestation, and erosion in African countries are calculated. The impact of deforestation and soil erosion due to inappropriate land use on climate change for African countries is calculated up to 2060. © 2017, Pleiades Publishing, Ltd

Rock fragments from mud volcanic deposits of the Gulf of Cadiz: An insight into the Eocene-Pliocene sedimentary succession of the basin

Two hundred clasts from the mud breccia extruded by the Yuma mud volcano in the Gulf of Cadiz are used to establish an offshore stratigraphy. The clasts are a very complex mixture of material from the sedimentary successions through which the mud volcano erupted and provide important information about the composition and genesis of deep-seated strata. We deal with fragments of rocks that were deposited millions of years ago, subsequently buried and later erupted on to the seafloor. Rock fragments from the mud breccia, studied in thin section under a polarizing microscope, provide genetic indications suggestive of deep-sea conditions during the accumulation of strata. A reconstruction of the sedimentary succession through which the Yuma mud volcano erupted and the depositional evolution of the Gulf of Cadiz was made on the basis of lithology and age determinations of the rock. Age and depositional environment documented by the clasts indicate that a marine basin existed in the Gulf of Cadiz area at least from the Eocene, and that in the Early and Middle Eocene a deep-sea fan depositional environment prevailed in the region, resulting in the accumulation of thick turbidites. The Late Eocene and Oligocene are not represented among rock fragments from the mud breccia, suggesting regional uplift and non-deposition in the area. Sedimentation was re-established in the Miocene with the accumulation of a clayey Aquitanian-Burdigalian succession. Pelagic carbonate sedimentation became predominant in the Langhian time. The Serravallian-Early Tortonian is characterized by a high supply of terrigenous material, resulting in the deposition of turbiditic clays and sands. Shallow water sedimentation with accumulation of carbonate rocks prevailed in the basin during the Middle Tortonian. © 2003 Elsevier Science B.V. All rights reserved

Biodiversity of phototrophs in illuminated entrance zones of seven caves in Montenegro

The biodiversity of the entrance zones of the Montenegro caves is barely studied, therefore the purpose of this study was to assess the biodiversity of several caves in Montenegro. The samples of phototrophs were taken from various substrates of the entrance zone of 7 caves in July 2017. A total of 87 species of phototrophs were identified, including 64 species of algae and Cyanobacteria, and 21 species of Bryophyta. Comparison of biodiversity was carried out using Jacquard and Shorygin indices. The prevalence of cyanobacteria in the algal flora and the dominance of green algae were revealed. The composition of the phototrophic communities was influenced mainly by the morphology of the entrance zones, not by the spatial proximity of the studied caves. © 2019, Ecologica Montenegrina