THE STIMULATING INFLUENCE OF ULTRASOUND ON THE PHAGOCYTIC ACTIVITY OF NEUTROPHIL GRANULOCYTES IN EXPERIMENTS «IN VITRO»

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INFLUENCE OF A HETEROGENEOUS HIGH-POLYMER DNA UPON ERYTHROPOIESIS

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ТНЕ INFLUENCE Of CORТICAL FACТORS ON NEURO-VEGETAТIVE REACТIVIТY

The ргоblеm of interrelations between the cervical cortex and its higher vegetative centers has an essential bеагiпg on the complex process of influencing and regulating functions in the organisrn. Recently it has assumed а particular actuality, brought about bу the гapid progress of our knowledge on the physiological importance ol formatio reticularis in which higher vegetative centers аге included. With the pur pose of studying some particular aspects in this interrelation, we in­vestigated the changes in the neuro-vegetative reactivity during examination sessions of students; as well known, in them а widespread radiation occurs of excitation processes produced bу the examination state. The influence of the functional conditions of the сегеbгаl согtех on some of the vegetative functions during examination of students was also subject to investigation bу Gotzev and associates

ТНЕ EFFECT OF VARNA SEA-COAST CLIMAТIC FACTORS ON NEURO-VEGEТAТIVE REACТIVIТY

The effect of Black sea-coast factors оn various functions of healthy individuals and persons with various affections has been the objective of а number оf investigations in Bulgaria. The alterations of the neuro-vegetative reactivity under the effect of climatic factors of the sea-shore region is of special interest, for it greatly contributes to the elucidatjon оf the mechanism bу which these factors influence and mnodify the various functions оf the organism

COMPARATIVE INVESTIGATION OF THE PRECIPITATING INFLUENCE OF HISTONES UPON PLASMA OF RATS WITH TUMOURS AND HEALTHY ONES

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THE INFLUENCE OF CORTICAL FACTORS ON PHAGOCYTOSIS

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Seasonal differences in fatty acid content of white brine cheese offered at the Bulgarian market

The present study provides scientific information for fatty acid composition of white brine cheese from cow milk, produced from all regions of Bulgaria, across seasons for the period 2012–2016. A total of 670 samples produced from different manufacturers and collected from supermarkets by Offi-cial control of Bulgarian Food Safety Agency (BFSA) were examined. Fatty acid composition was determined by gas chromatography. The milk fat purity of 18 samples was established through gas chromatographic analysis of triglycerides. Seasonal variations were observed in fatty acid composi-tion of white brine cheese. The seasonal changes in the concentration of lauric, myristic, palmitic, stearic, oleic and α-linolenic acids have largely contributed to the variation of fatty acid composition of cheese. Saturated fatty acids (SFAs) were in the range 68.39–71.53% of total FAs and the propor-tion of unsaturated fatty acids (UFA) was 28.44–31.61% of total FAs. Fourty-five out of examined samples have exhibited different fatty acid profile than that established in the present study for cow milk cheese. The determined SFAs were 44.7–57.5% and UFA varied from 42.5% to 55.3%. The fatty acids with short chain (C4:0 ÷ C10:0) were not detected or in traces, lauric and myristic acids were in small amounts, while palmitic and oleic acids predominated in the fatty acid composition of cheese analogues

Unclear associations between small pelagic fish and jellyfish in several major marine ecosystems

During the last 20 years, a series of studies has suggested trends of increasing jellyfish (Cnidaria and Ctenophora) biomass in several major ecosystems worldwide. Some of these systems have been heavily fished, causing a decline among their historically dominant small pelagic fish stocks, or have experienced environmental shifts favouring jellyfish proliferation. Apparent reduction in fish abundance alongside increasing jellyfish abundance has led to hypotheses suggesting that jellyfish in these areas could be replacing small planktivorous fish through resource competition and/or through predation on early life stages of fish. In this study, we test these hypotheses using extended and published data of jellyfish, small pelagic fish and crustacean zooplankton biomass from four major ecosystems within the period of 1960 to 2014: the Southeastern Bering Sea, the Black Sea, the Northern California Current and the Northern Benguela. Except for a negative association between jellyfish and crustacean zooplankton in the Black Sea, we found no evidence of jellyfish biomass being related to the biomass of small pelagic fish nor to a common crustacean zooplankton resource. Calculations of the energy requirements of small pelagic fish and jellyfish stocks in the most recent years suggest that fish predation on crustacean zooplankton is 2–30 times higher than jellyfish predation, depending on ecosystem. However, compared with available historical data in the Southeastern Bering Sea and the Black Sea, it is evident that jellyfish have increased their share of the common resource, and that jellyfish can account for up to 30% of the combined fish-jellyfish energy consumption. We conclude that the best available time-series data do not suggest that jellyfish are outcompeting, or have replaced, small pelagic fish on a regional scale in any of the four investigated ecosystems. However, further clarification of the role of jellyfish requires higher-resolution spatial, temporal and taxonomic sampling of the pelagic community.publishedVersio

Astigmatism management during cataract surgery

Цел: да обсъдим и споделим нашия опит при интраоперативната корекция на роговичния астигматизъм по време на катарактна хирургия. Методи: В проучването са включени 48 пациенти с различна степен на роговичен астигматизъм, разделени в две групи. Подборът на метода на корекция на астигматизма беше направен на база на степента на астигматизма след изследване на роговицата с корнеален топограф и томограф. Пациентите с роговичен астигматизъм до 2,5 Д -38 очи третирахме с АК (аркуатни кератотомии), извършени с B&L VICTUS Femtosecond Laser P1atform , при останалите 11 очи имплантирахме торична вътреочна леща. Проследихме пациентите за период от 18 месеца постоперативно. Резултати: И в двете групи получихме желаната корекция на астигматизма постоперативно, В първата група редукцията на астигматизма беше средно 1, 71 dpt ± 0,63 (SD) до 0,28 ± 0,39 (РObjective: To share our experience in correcting corneal astigmatism in patients undergoing cataract surgery. Methods: Our study includes 48 eyes, 37 eyes with a corneal astigmatism of up to 2.50 dpt and 11 eyes with a higher (>2.50dpt) astigmatism. The first group was treated with arcuate keratotomies (AK) performed by B&L VICTUS Femtosecond Laser Platform. The AKs were placed on the steepest corneal meridian in a resulting depth of 85% based on the real-time OCT pachymetry. Patients from group 2 were treated with intraocular toric IOLs. Postsurgical follow-up period was 18 months and includes uncorrected visual acuity, manifest refraction, count and density of endothelial corneal cells prior to and after surgery, pachymetry, corneal topography (Placidobased and Scheimpflug image -derived topography). Results: - The mean astigmatismus reduction in the first group was from 1.71 D ± 0.63 (SD) to 0.28 ± 0.39 D (

Magnetic stimulation for non-homogeneous biological structures

BACKGROUND: Magnetic stimulation has gained relatively wide application in studying nervous system structures. This technology has the advantage of reduced excitation of sensory nerve endings, and hence results in quasi-painless action. It has become clinically accepted modality for brain stimulation. However, theoretical and practical solutions for assessment of induced current distribution need more detailed and accurate consideration. Some possible analyses are proposed for distribution of the current induced from excitation current contours of different shape and disposition. Relatively non-difficult solutions are shown, applicable for two- and three-dimensional analysis. METHODS: The boundary conditions for field analysis by the internal Dirichlet problem are introduced, based on the vector potential field excited by external current coils. The feedback from the induced eddy currents is neglected. Finite element modeling is applied for obtaining the electromagnetic fields distribution in a non-homogeneous domain. RESULTS: The distributions were obtained in a non-homogeneous structure comprised of homogeneous layers. A tendency was found of the induced currents to follow paths in lower resistivity layers, deviating from the expected theoretical course for a homogeneous domain. Current density concentrations occur at the boundary between layers, suggesting the possibility for focusing on, or predicting of, a zone of stimulation. CONCLUSION: The theoretical basis and simplified approach for generation of 3D FEM networks for magnetic stimulation analysis are presented, applicable in non-homogeneous and non-linear media. The inconveniences of introducing external excitation currents are avoided. Thus, the possibilities are improved for analysis of distributions induced by time-varying currents from contours of various geometry and position with respect to the medium