Peculiar Composition Research Articles

HD 66051, an eclipsing binary hosting a highly peculiar, HgMn-related star

HD 66051 is an eclipsing system with an orbital period of about 4.75 d that exhibits out-of-eclipse variability with the same period. New multicolour photometric observations confirm the longevity of the secondary variations, which we interpret as a signature of surface inhomogeneities on one of the components. Using archival and newly acquired high-resolution spectra, we have performed a detailed abundance analysis. The primary component is a slowly rotating late B-type star (Teff = 12500 ± 200 K; log g = 4.0, v sin i = 27 ± 2 km s−1) with a highly peculiar composition reminiscent of the singular HgMn-related star HD 65949, which seems to be its closest analogue. Some light elements as He, C, Mg, Al are depleted, while Si and P are enhanced. Except for Ni, all the iron-group elements, as well as most of the heavy elements, and in particular the REE elements, are overabundant. The secondary component was estimated to be a slowly rotating A-type star (Teff ~ 8000 K; log g = 4.0, v sin i ~ 18 km s−1). The unique configuration of HD 66051 opens up intriguing possibilities for future research, which might eventually and significantly contribute to the understanding of such diverse phenomena as atmospheric structure, mass transfer, magnetic fields, photometric variability and the origin of chemical anomalies observed in HgMn stars and related objects.

Chromium-nanodiamond coatings obtained by magnetron sputtering and their tribological properties

Peculiarities of structure, chemical and phase composition, micromechanical and tribological properties of chromium-based coatings obtained by magnetron-sputtering of composite and/or compacted chromium-nanodiamond targets have been investigated.

Peculiarities of cellular composition and microarchitecture of human hemal nodes.

Background. Cellular composition of lymph nodes is well described while in hemal nodes it is still poorly investigated. Objective. To define peculiarities of distribution of major types of immunocompetent cells and stromal elements in human hemal nodes. Methods. Hemal nodes were taken during autopsy from patients who died due to cardiovascular or respiratory pathology. Standard histological and immunohistochemical methods were used to detect different cellular types and stromal elements. Results. Distributions of lymphocytes was investigated with the help of anti-CD20, CD3 and CD8 antibodies. To analyze dendritic cells and macrophages anti S100 and CD68 antibodies were used. Stromal elements were detected with the help of anti SMA and CD34 antibodies. Conclusion. Hemal nodes have the same character of immune cells’ distribution as in lymph nodes, except B-cells, which are equally present in paracortex and medullary cords. Among well-developed intranodal vasculature there were revealed CD34-negatve vessels, which are also known in literature as system of conduits.

Structural, physiological, and biochemical aspects of salinity tolerance of halophytes

Modern concepts on structural, physiological, and biochemical aspects of salt tolerance of higher plants were considered. Integral physiological processes, such as growth and photosynthesis of glycophytes and halophytes in the context of their ecological plasticity, variety of their adaptive strategies developed in the course of their evolution, and natural selection, were discussed. Analysis of the known anatomical and morphological adaptations of halophytes (succulence, special salt-excreting structures, features associated with special tissues growth, leaf kranz-anatomy and mesostructure) providing their salt tolerance was conducted. The most important physiological and biochemical adaptations of such plants to salinity related to uptake, accumulation and excretion of Na+ and Cl–, peculiarities of membrane composition and the pigment system, and protection against osmotic and oxidative stresses were described. The association of physiological and biochemical peculiarities of halophytes with ecological salt tolerance strategy was discussed.

COMPARATIVE STUDY OF PHENOLIC COMPOUNDS COMPOSITION AND CONTENT IN LEAVES OF THE GE-NUS NITRARIA (NITRARIACEAE) PLANTS

The content and composition of phenolic compounds in leaves of 3 Nitraria L. species from 12 populations have been studied with a high-performance liquid chromatography (HPLC). The investigation has detected 17 phenolic compounds, the maximum number of components is 12 indicated in leaves of N. pamirica L. Vassil. and N. schoberi L. plants in 2 populations, the minimum – 6 components – has been revealed in leaves of N. komarovii Iljin et Lava. Hyperoside (O-glycoside of quercetin), narcissin (O-glycoside of isoramnetin), quercetin (flavonol) and luteolin (flavon) have been identified. Studied plants accumulate a significant amount of phenolic compounds. Their content reaches 2,57% in leaves of N. schoberi L., 3,96% in N. komarovii. It was marked seasonal dynamics of a number of substances, in particular, lower narcissin content during plants fruiting compared to a flowering stage. The study results allow making an assumption of species peculiarities of phenolic compounds composition and content in N. schoberi and N. komarovii. The components composition is poorer in extracts of N. komarovii leaves, however, they shows higher content of total phenolic compounds compared with N. schoberi plants. At the same time N. pamirica sample is close to N. schoberi one based on a multivariate analysis of phenolic compounds composition and content.

Biochemical properties of the plasma of rats with the experimentally induced hepatitis after oral administration of sodium diclofenac

We conducted an analysis of the metabolic activity of the liver and defined the peculiarities of biochemical parameters and macroelement composition of blood plasma of rats with experimentally induced toxic hepatitis. Hepatopathology was modeled by oral administration of sodium diclofenac at a dose of 12.5 mg/kg of body mass to rats during 14 days. For the preparation of plasma, rat blood was collected from the abdominal aorta into test-tubes with heparin, and then it was centrifuged at 1500 rev./min for 15–20 min. Then we studied biochemical parameters of blood indicators (level of total protein, albumin, total and conjugated bilirubin, glucose, creatinine, urea, triacylglycerols, cholesterol, thymol test value, activities of ALT, AST, LP and GGT, amylase and lipase) and also its macroelement composition: concentration of sodium, potassium, phosphorus, calcium, magnesium and chlorine using automatic biochemical analyzer «BioSystem A15» (Spain) according to the recommendations of the International Federation of Clinical Chemistry (IFCC) Experts Panel. The results of the introduction in the laboratory rats of drug-induced toxic hepatitis indicate a decrease of metabolic activity of hepatocytes under this hepatopathology. The results showed a decrease in total protein by 17%, albumin by 11%, glucose by 6% , triacylglycerols by 53%, cholesterol by 54%, and an appreciable increase in thymol test value (by a factor of 2.8). Besides this, disruption of the liver pigment function, development of cytolytic syndrome and intrahepatic cholestasis were revealed in the affected animals. The increased activity of the studied blood enzymes (ALT by 28%, AST by 45%, LP by 30%, GGT by a factor of 2.1) confirmed these disruptions. The increase in AST/ALT by 12% ratio confirmed destructive changes in cell membranes, including mitochondrial membranes, caused by metabolic changes under the toxic influence of sodium diclofenac. The increased activities of α-amylase by a factor of 2.4 and lipase by a factor of 8.3 indicate complex negative changes in the organism, not only in liver structure, but also in the pancreas. The results of the study indicate hypocalcemia (decrease by 29%), hypophosphatemia (decrease by 47%) and hypomagnesaemia (decrease by 38%) and a simultaneous increase in the Ca : P ratio by 35%. The last mentioned changes can cause the development of endogenous osteopathy. The results of the study can be used in diagnostics of development of hepatopathology caused by the toxic effects of medication on the liver, for prevention of complications through the early implementation of effective correction therapy.

Formation peculiarities of physical and chemical composition of highly mineralized edge water

The authors express special gratitude to Candidate of Geological Sciences Petro Dryhulych and Doctor of Technical Sciences Yaroslav Semchuk for consultations and advice in the writing of the article.

Origin of the dunitic mantle-crust transition zone in the Oman ophiolite: The interplay between percolating magmas and high-temperature hydrous fluids

Determining which petrological processes build the mantle-crust dunitic transition zone (DTZ) in oceanic spreading settings has a direct impact on our understanding of thermal and chemical transfers on Earth. We report on understated but widespread mineral assemblages present in the DTZ at the top of a mantle diapir (Oman ophiolite), including pargasite, grossular, and pyroxenes of peculiar composition. These minerals are present interstitially between olivines and as inclusions in the disseminated chromite grains, indicating that they are early, high-temperature features. They call for hybridization between the mid-oceanic ridge basalt melts that fed the crustal section and supercritical water saturated with silica. Our synoptic survey (∼300 samples collected along 11 cross sections) demonstrates that the DTZ was pervasively infiltrated by such hybrid melts and that the abundance of their crystallization products increases upsection, likely in response to increasing supply of water and decreasing temperature. This indicates that water is involved in the reaction leading to the transformation of mantle harzburgite into dunite in the DTZ. On the basis of field evidence, a hydrothermal origin of the water is a reasonable hypothesis.

Main indicators of physical development and somatotypological features of men in older age groups

The article presents the anthropometric indicators of 210 old age men (aged 60-74 years), 108 elderly men (aged 75-90 years) and 125 long-liver men (aged 90-98 years) of the Slavic ethnic group, living in Moscow and Moscow region. Significant differences in basic anthropometric parameters have been established in body weight and body mass index between the three age groups. Average values of body height in elderly men were lower by 0.6% (p>0.05), and in long-liver men were significantly lower by 4.6% than in old age men. Diameters did not have statistically significant differences in all age groups. Averages values of all circumferences of available limbs significantly differed in three age groups, averages values of waist and thigh circumference significantly differed only in the group of long-liver men and old age men. Averages values of breast circumference were not statistically different in three age groups. Average values of all eight skin-fat folds were significantly lower in long-liver men compared with old age men, whereas in elderly men only skin-fat folds of shoulder front and back, forearms, chest and lower leg were significantly less than in old age men. Somatotypological analysis revealed a different frequency of somatotype occurrence and the prevalence of 3 main types among men of older age groups (old age men, elderly men, long-liver men) - chest (18.5, 26.2 and 28.4%), abdominal-muscle (20.1, 15.4 and 16.8%) and abdominal (20.8, 22.2 and 19.4% respectively). Also the peculiarities of the component body composition of men of older age groups were revealed. Body composition analysis revealed a decrease in the average indicators of the absolute content of bone, fat and muscular body components from the old age to the period of longevity (long-liver men). Absolute content of bone tissue in elderly men (7.9±0.3 kg) didn't differ and in the period of longevity (6.8±0.2 kg) was less by 1.18 fold (p<0.05) than in old age men (8.0±0.3 kg). Absolute amount of body fat tissue in elderly men (16.1±1.2 kg) was less by 1.09 fold (p<0.05) and in long-liver men (12.5±1.0 kg) was less by 1.41 fold (p<0.05) than in old age men (17.6±1.4 kg). Absolute amount of body muscle tissue in elderly men (18.2±0.3 kg) was less by 1.17 fold (p<0.05) and in the period of longevity (16.3±0.2 kg) was less by 1.31 fold (p<0.05) than in old age men (21.3±0.2 kg). Average relative indicators of the major body components with aging undergo a number of changes, which are reflected in the reduction of quantity of bone and muscle tissue and increasing rates of adipose tissue.

Особливості пігментного складу та ультраструктурної будови хлоропластів рослин різних таксонів

Особливості пігментного складу та ультраструктурної будови хлоропластів рослин різних таксонів

Прибрежная травяная растительность пойм рек Вычегда и Печора. Класс Phragmito–Magno-Caricetea Klika in Klika et Novák 1941

The present study continues a series of publications by the authors on the diversity of the herb vegetation in the floodplains of the Vychegda and Pechora rivers and their tributaries (Komi Republic). The floristic classification of the orders Molinietalia Koch 1926 and Arrhenatheretalia R. Tx. 1931 was published earlier (Shushpannikova, Yamalov, 2013, 2014). The results of classification of communities belonging to the class Phragmito–Magno-Caricetea Klika in Klika et Novák 1941 are discussed in this paper in accordance with principles of the Braun-Blanquet approach (Braun-Blanquet, 1964; Mirkin, Naumova, 1998). Analysis was based on 268 relevés made in 1981–2016. The assessment of environmental parameters was performed by ecological methods by L. G. Ramensky (Ramensky et al., 1956). Syntaxonomic diversity of the vegetation of the class Phragmito–Magno-Caricetea in the floodplain of rivers Vychegda and Pechora is presented by 3 orders (Phragmitetalia W. Koch 1926, Oenanthetalia aquaticae Hejny in Kopecky et Hejny 1965 and Magno-Caricetalia Pignatti 1953), 4 alliances (Phragmition communis W. Koch 1926, Nardosmion laevigatae Klotz et Köck 1986, Equisetion arvensis Mirkin. et Naumova in Kononov et al. 1989 emend. Taran 1995 and Magnocaricion elatae Koch 1926) and 13 associations. The communities of the class Phragmito–Magno-Caricetea, as well as the order Molinietalia of Molinio–Arrhenatheretea, are located at all levels of the floodplains and are characterized by a variety of humidification conditions. However, the communities of the class Phragmito–Magno-Caricetea are characterized by higher humidification indices (72.2–86.3) compared to meadow vegetation the order Molinietalia of the class Molinio-Arrhenatheretea of (68.8–74.4). A lot of associations, heterogeneous in their floristic composition, can be divided into 9 subassociations and 10 variants. New 4 subassociations (caricetosum vesicariae, equisetosum fluviatilis, persicaretosum amphibiae and lysimachetosum vulgaris), are included into ass. Caricetum gracilis Savich 1926. The peculiarities of the floristic composition of the above mentioned associations, as well as their distribution and ecology are discussed. The distinguished associations are well differentiated by their elevation position on the floodplains. The communities of the ass. Caricetum gracilis are located at all levels of the floodplainons; these of Agrostio stoloniferae–Equisetetum arvensis — on the highest ones; Equisetetum fluviatilis — on the lowest part of the floodplains in the riparian zone. The described communities are located on the soils with various ecological indi­cators. The distinguished associations are differentiated by the levels of humidification (65.9–89.9), mean figures — 70.3–86.3. The communities of the ass. Agrostio stoloniferae–Equisetetum arvensis occupy the driest sites (65.9–72.9); these of associations ­Equisetetum fluviatilis and Nardosmietum laevigatae — the wettest ones (80.7–87.8). The ass. Caricetum aquatilis has a wide range of humidification (72.7–89.9). The variability of humidification varies from alternating to high values (6.4–12.0). The ­greatest differences in humidification are experienced by the communities of the ass. Caricetum gracilis (5.5–12.0). Тhe communities of the ass. Agrostio stoloniferae–Equisetetum arvensis occupy the richest (10.5–15.0) and alluvial soils (4.0–5.0). They are located on the low level in the riverine and middle zone of the floodplain and are formed by annual flooding on alluvial deposits. The distinguished associations are differentiated by pH (3.0–8.0), mean figures — 4.5–7.0. The communities of the associations Caricetum juncellae, Caricetum gracilis and Caricetum acutae–rostratae are located on the most acidic soil; these of the ass. Equisetetum fluviatilis — on the neutral ones. The associations are distributed by the scale of pasture digression in range 2.5–4.5, mean figures — 3.0–3.9. The communities are used for hay-making. The question of the boundary between the meadow vegetation, lowland swamp and semi-aquatic vegetation remains unsolved. The communities of the class Phragmito–Magno-Caricetea described in this paper belongs to meadows. Ass. Nardosmietum laevigatae (previously referred to the class Galio-Urticetea Pass. 1967) is included into the order Phragmitetalia W. Koch 1926. The communities of the ass. Agrostio stoloniferae–Equisetetum arvensis have a mesophilic species composition and low moisture values, so they represent a transition between the class Molinio-Arrhenatheretea order Molinietalia and class Phragmito–Magno-Caricetea. A comparison of species composition of the syntaxa in Komi Republic and that in other regions of the Eastern Europe and the Asian part of Russia showed that the semiaquatic communities of the Komi Republic have low species diversity. It is less than 16 species on sample plot. The richest are communities of the associations Caricetum gracilis and Carici acutae–Phalaroidetum arundinaceae. 101 vascular plant species are recorded in 268 geobotanical relevés of the class Phragmito–Magno-Caricetea. The aboveground phytomass varies from 30–80 g/m2 (Agrostio stoloniferae–Equisetetum arvensis) to 420 г/м2 (Phalaroidetum arundinaceae).

UTILIZATION OF SECONDARY TRICTICALE PROCESSING PRODUCTS WITH PRODUCTION OF FODDER MICROBIAL-VEGETATIVE CONCENTRATE FOR POND FISH

Abstract. Aim. The aim of the study was to develop a process for the utilization of secondary products of triticale grain processing into starch and protein concentrate with production of fodder microbial-vegetative concentrate (FMVC) for pond fish. Methods . Standard and special methods for the analysis of chemical, biochemical composition (amino acid, mineral, fatty acid, carbohydrate), microbiological parameters of triticale grain, secondary products of its processing and FMVC were used in this work. Results. It is shown that considering the peculiarities of the chemical composition of whey water, insoluble residue and pulp, it is expedient to produce FMVC by bioconversion method using the producer-yeast Saccharomyces cerevisiae. The feed value of FMVC in terms of protein, lipids, minerals, and fiber met the normative parameters for fodder for pond fish of the Cyprinidae family. FMVC contained digestible carbohydrates, a high-quality protein with essential amino acids and lipids, which included saturated, unsaturated fatty acids, including ω-6, ω-3 families and phosphatides. Conclusion. A process of bioconversion has been developed for the utilization of secondary products of triticale grain processing into starch A and protein concentrate, with the production of FMVC for pond fish based on whey waters. The concentrate was characterized by high values of essential amino acids score, the predominance of unsaturated fatty acids, the presence of biologically active phospholipids, sterols, micro-, macroelements. The use of a concentrate as an additive will ensure the survivability of fish, increase growth, reduce the cost of feed and improve the ecological situation of the starch factory.

ВПЛИВ АВТОХТОННИХ ДРІЖДЖІВ НА ВМІСТ ФЕНОЛЬНИХ СПОЛУК У ЧЕРВОНИХ СТОЛОВИХ ВИНОМАТЕРІАЛАХ

Actuality of the research. Scientists of the world viticultural countries paid much attention to the study of autochthonous strains of wine yeast and the mechanism of yeast influence onto wine phenolic composition. There are now such researches in Ukraine, in spite of the attention to the quality of local wines. Thus, the autochthonous strains of wine yeast researches in Ukraine are very important.Target setting. The color of the wine is determined by phenolic compounds and melanoidins. Flavones - flavonols (yellow), anthocyanins (different shades of blue and purple); leykoantotsiany are phenolic compounds that give color to wines. Technology of red wines aimed at the extraction of required quantity of the structural elements of grape clusters. The strains of wine yeast is influencing the processes of extraction, so it is necessary to examine the extent to which they are able to influence these processes in relation to phenol and coloring substances.Actual scientific researches and issues analysis In this article, we studied the mechanism of interaction of phenolic complex of grapes and wine with yeast. The implication of wine yeast in red wine colour is twofold. On one hand, wine yeast influences the extraction of grape anthocyanins during maceration and fermentation, depending on their alcohol production capacity. They also influence the formation of more stable anthocyanin forms during maturation and ageing. On the other hand, yeast can promote anthocyanin degradation and participate in certain interactions with pigments that result in colour loss.The research objective Therefore, the aim of the study was to determine the peculiarities of phenolic composition of wines Cabernet Sauvignon, Odessa zhemchug, Charivnyi, Agate taroskyi, Otrada, obtained under microvinification with the use of autochthonous strains of wine yeast.The statement of basic materials. 30 samples of wines obtained by fermentation on spontaneous microflora and on 5 strains of indigenous yeast Y-3645; Y-3648; Y-3647; Y-3649; Y-3646 were chemically analysed. Its phenolic composition were evaluated and the yeast strain, the use of which provides better extraction of phenolic compounds and coloring was determined.Conclusions. The optimum fermentation conditions were found. The fact, that the yeast strain Y-3647 provides better extraction of phenolic compounds and coloring was determined.

ОСОБЕННОСТИ РАЗВИТИЯ И КОМПОНЕНТНОГО СОСТАВА ЭФИРНОГО МАСЛА ARTEMISIA ANNUA L. В УСЛОВИЯХ ЮЖНОГО БЕРЕГА КРЫМА

ОСОБЕННОСТИ РАЗВИТИЯ И КОМПОНЕНТНОГО СОСТАВА ЭФИРНОГО МАСЛА ARTEMISIA ANNUA L. В УСЛОВИЯХ ЮЖНОГО БЕРЕГА КРЫМА

"Vulnerable italy": between academic debate and a moltitude of social and political actors

The article is an introduction to a special issue of Sociologia Urbana e Rurale whose aim is to present a significant overview of Italian sociology of disaster. In order to better frame the contents of the issue, the article starts with a short reconstruction of the sociological reflection on the topic, putting it in relation to the changes that took place in Italian intervention strategies in the event of a calamity. Eventually the article highlights how a territorial approach could stress both the specific character of each context affected by catastrophes and the peculiar composition of the different forms of capital on it. In doing so, the latest seismic events that it central Italy in 2016 are considered in the analysis.

Biochemical characteristics of soybean seeds for selection of food varieties

The aim and tasks of the study.The research purpose was to study biochemical characteristics that determine seed quality, including peculiarities of changes in total protein and isoflavone contents, component composition and level of 7S and 11S globulins, their ratio in soybean seed protein of varieties, F2 - F8 hybrids of different genetic origin for development of criteria for selection of food soybean genotypes.Material and methods. The investigation was conducted on soybean (Glycine max L.) varieties, F2 – F8 hybrid populations bred in Ukraine or other countries and their parents as well as on genotypes with known status of glicinine and β-conglicinine genes from the National Plant Germplasm System. Protein content was determined by Kjeldal method on a Kjltec Auto-1030. 7S and 11S globulins were extracted and identified by a method developed in the Laboratory of Plant Biochemistry (Patent 42181).Total isoflavones were determined by spectrophotometrically.Results and discussion. It was shown that the test soybean varieties considerably differed by the total protein and isoflavone contents as well as by 7S and 11S globulin fractions. Intervarietal polymorphism of component composition of 7S and 11S globulins was shown electrophoretically. Peculiarities of 7S and 11S globulin component composition and contents as well as their ratios were described for genotypes of different phylogenetic origin, F3 - F8 hybrids and their parents. An express method for extraction and identification of 7S and 11S globulins from soybean seeds was developed for estimation of breeding material by these characteristics.Conclusions. We observed considerable variations in the studied biochemical indices, which determine nutritional value of soybean seeds. We conclude that these results can be used for selection of food soybean varieties

Research of nanomodified portland cement compositions with high early age strength

An innovative method for the creation of rapid hardening building composites with multifunctional purposes and specified properties under different operating conditions is their nanomodification. This technique is based on the principles of directional control and control over the processes of structure formation of material, as well as over kinetics and mechanism for chemical interactions at the early stages of the hardening process of cement matrix. Comprehensive assessment of particle size distribution of ultrafine mineral additives by the indicator of differential coefficient of surface activity was carried out. Physical and mechanical properties of the nanomodified Portland cement composition, which contain ultrafine mineral additives, polycarboxylate superplasticizer, alkaline containing accelerator of hardening, as well as nanoscale particles of calcium hydrosilicate, were investigated. Peculiarities of the phase composition and microstructure of nanomodified Portland cement composition were established by physical and chemical analysis methods. It was established that the examined Portland cement compositions are characterized by intensive development of early strength, and by the indicator of standard strength they are related to high strength binder. It is demonstrated that acceleration of the hardening processes of nanomodified Portland cement compositions is due to the optimization of particles packing of the system, the presence of energy-active particles in the composition of mineral additive, increasing of liquid phase alkalinity, stimulating of nucleation processes in the inter-grain space due to heterogeneous or homogeneous nucleation, accelerating of reactions associated with pozzolanic activity of ultrafine additives. A widespread using of rapid hardening concretes based on the nanomodified Portland cement compositions with high strength at an early age will provide for an increase in efficiency of erecting monolithic structures, road infrastructure objects, of manufacturing precast reinforced concrete products, of carrying out repair and restoration works, including those under different temperature conditions.

The Origin of the Natural Water Chemical Composition in the Permafrost Region of the Eastern Slope of the Polar Urals

This article presents the results of the study of water chemical composition and formation processes in the eastern slope of the Polar Ural where permafrost is widely spread. To date, this region has not been studied in detail. However, it is very important to have information on the natural waters in this region because they play a significant role in all geochemical processes, including climate formation. For this study, 107 water samples were collected from lakes, rivers and active layer waters. The studied waters are ultrafresh; total dissolved solids vary from 14 to 438 mg/L. pH ranges from 3.5 to 9.0. The chemical type of the studied waters is mostly HCO3–Ca–Mg. The geochemical environment of the studied waters contributes to the accumulation of such trace elements as Fe, Mn, Al, Ni, Au, Co, Li, Sc, Ti, Cr, Sr, Nb, Mo, Cs, La, Eu, Lu, Hg, and Se. The chemical composition peculiarities of active layer waters, rivers, lakes and waters of stone pits and exploration trenches and the description of their chemical composition formation processes are given in the present study. The water–rock interaction is a dominant process of water chemical composition formation in the studied region. The obtained results have both potential theoretical and practical applications.

Chemical profile and biological activities of Cedrelopsis grevei H. Baillon bark essential oil

Cedrelopsis grevei H. Baillon bark, endemic plant from Madagascar, is used in folk medicine for the treatment of rheumatism, muscular pain, and for its antifungal and antibiotic activities. In this paper, the phytochemical composition, antioxidant, antimicrobial, and cytotoxic activities of C. grevei bark essential oil (EO), its non-polar (I and II) and polar (III) fractions and its main compounds (ishwarane, β-elemene and α-copaene) were investigated.The GC–MS analysis pointed out the presence of 36 components, representing about 80% as semi-quantitative characterization of the total. The presence of ishwarane, β-elemene and α-copaene as the main constituents highlighted its peculiar composition as a sesquiterpene-rich phytocomplex. Moreover, the quantification was performed for the first time by means of the experimental and predicted response factors (ERFs and PRFs, respectively).As regards the biological activity, C. grevei EO and its fractions showed weak antioxidant activity against Trolox. The whole EO demonstrated instead considerable antimicrobial activity against Staphylococcus aureus and Staphylococcus epidermidis, while its polar-fraction evidenced an interesting bioactivity against Pseudomonas aeruginosa and Candida albicans. Finally, C. grevei EO and its fractions exhibited an interesting cytotoxic activity on human lung cancer cells (A549) and human colorectal cancer cells (CaCo-2).

Багаторічна динаміка щільності стану розвитку міжвидових популяцій злакових попелиць (Homoptera, Aphididae) упродовж вегетації пшениці озимої в умовах Лісостепу України

Багаторічна динаміка щільності стану розвитку міжвидових популяцій злакових попелиць (Homoptera, Aphididae) упродовж вегетації пшениці озимої в умовах Лісостепу України