51 research outputs found
Corrigendum: Georgieva E, Yancheva V, Velcheva I, Becheva M, Stoyanova S. Histological alterations under metal exposure in gills of European perch (Perca fluviatilis L.) from Topolnitsa Reservoir (Bulgaria). Arch Biol Sci. 2015;67(2):729-737, https://doi.org/10.2298/ABS141020034G
No full textThe corresponding author of the article Georgieva E, Yancheva V, Velcheva I,
Becheva M, Stoyanova S. Histological alterations under metal exposure in
gills of European perch (Perca fluviatilis L.) from Topolnitsa Reservoir
(Bulgaria). Arch Biol Sci. 2015;67(2):729-737 has requested to change the
affiliations of author Maria Becheva. The affiliations of author Maria
Becheva are as follows: Maria Becheva Medical College, Medical University of
Plovdiv, Plovdiv, Bulgaria Link to the corrected article 10.2298/ABS141020034G</u
Crystallization and Morphology of Fibers Prepared from Compatibilized Blends of Polyethylene With Liquid Crystalline Polymers
No full textMorphology and rheology of HDPE LCP blends compatibilized by a novel PE-g-LCP copolymer
No full textA novel graft copolymer (PE-g-LCP) consisting of polyethylene (PE) backbones and liquid crystalline polymer (LCP) branches was synthesized via reactive blending of an acrylic acid-functionalized PE (Escor 5000 by Exxon) with a semiflexible LCP (SBH 1 : 1 : 2 by Eniricerche S.p.A.). The crude reactive blending product (COP) was shown by investigation of the fractions soluble in boiling toluene and xylene and of the residue to contain unreacted Escor and SBH, together with the graft copolymer forming the interphase. The compatibilizing activity of COP for PE/SBH blends, compared to that of pure Escor, was investigated using two PE grades. The COP addition into 80/20 PE/SBH blends caused a much stronger reduction of the SBH droplet dimensions and morphology stabilization than did that of pure Escor. The rheological behavior of the samples showed that COP leads to a slight increase of interfacial adhesion in the melt as well and that the effect is more pronounced when lower molar mass PE grade is used as the blend matrix. Melt-spinning tests demonstrated that deformation of the SBH droplets into highly oriented fibrils can be obtained for the blends of lower molar mass PE, compatibilized with small amounts of the novel PE-g-SBH copolymer. (C) 1999 John Wiley & Sons, Inc
Agricultural Academy
No full textabstract Petrova, S., I. velcheva, l.Yurukova and M.Berova, 2014. Plantago lanceolata l. as a biomonitor of trace elements in an urban area. Bulg. J. Agric. Sci., to get real information on environmental pollution with trace elements (al, cd, cr, cu, Pb and Zn) and their mobility in urban ecosystems, Plantago lanceolata l. plants and soil samples were collected in May 2010. Sampling sites were selected in urban areas with different anthropogenic impact (Plovdiv, Bulgaria). Significantly, elevated concentrations of Cd, Cr and Al were registered in all samples. Differences between trace element concentrations in sampled phytomass led to evaluation of the urban gradient theory in the context of the city of Plovdiv. the results of the investigation revealed the main problems and unfavorable factors, which affected urban vegetation. automobile transport was found to be the major source of contamination, followed by the industry. the contribution of some additional factors as canyon-street effect, wind rose, climate and topography of the region towards forming the environmental state was discussed. the approach used in our study could be successfully applied as a model to explore possibilities of using other herbaceous plant species for biomonitoring of the urban environmental status
PSYCHIC AND SOMATIC COMPLAINTS IN FEMALES AFTER SURGICALLY INDUCED POSTMENOPAUSE AND THEIR MANAGEMENT
No full textNo abstrac
Ricamatrici fogliari (Lepidoptera Tortricidae) raccolte su pioppi (Populus spp.) nella regione di Sofia, Bulgaria
No full textNegli anni 1997 e 1998 sono state effettuate ricerche sul complesso delle Tortrici(Lepidoptera Tortricidae) presenti su pioppi (Populus spp.) in tre località dellaregione di Sofia, precisamente Sofia, Kokaljane e Jeleznitsa. Le larve e le pupe diqueste ricamatrici fogliari sono state raccolte da piante e germogli di pioppo eallevate in laboratorio a temperatura di 18-22°C. Sono state individuate 14 specie,precisamente: Archips betulana (Hbn.), A. crataegana (Hbn.), A. padana (Scop.), A. rosana (L.), A. xylosteana (L.), Pandemis heparana (Den. & Schiff.), P. cerasana(Hbn.), Ptycholoma lecheana (L.) (Tortricinae), Cydia exquisitana (Rbl.), Gypsonomaaceriana (Dup.), G. dealbana (Frol.), G. minutana (Hbn.), Hedia salicella (L.) ePseudosciaphila branderiana (L.) (Olethreutinae). Otto specie - A. betulana, A.padana, A. rosana, C. exquisitana, G. dealbana, P. cerasana, P. lecheana e P.branderiana - sono qui riferite per la prima volta su pioppo in Bulgaria. Nelcomplesso dei Tortricidi studiato, G. aceriana ( 69 .0%) è risultata la specie dominante.C. exquisitana, G. minutana e P. cerasana sono da considerare subdominanti, mentrele residue sono poco numerose. C. exquisitana è xilofaga in quanto le larve sialimentano sotto la corteccia. La prima età larvale di G. aceriana si sviluppa sullefoglie del pioppo. Dopo la prima muta la larva entra nei giovani germogli. La densitàdi popolazione di G. aceriana è risultata più elevata a Sofia, dove nel 1997 sonostate raccolte una media di 2 larve/m di germoglio. Gli insetti infestano dal 23 al93.7% degli apici vegetativi dei pioppi. Le larve di G. minutana si alimentano tradue o più foglie collegate tra loro da fili sericei. Le larve delle altre specie arrotolanole foglie, come è caratteristica di molti Tortricidi. Con leccezione di G. aceriana,tutte le specie sono apparse con ridotte popolazioni e nel corso delle due annate nonsono da considerare come importanti avversità del pioppo.In the years 1997 and 1998 investigations were performed on thespecies composition and structure of a tortricid complex (Lepidoptera Tortricidae)on poplars (Populus spp.) at three places of the Sofia region - Sofia, Kokaljaneand Jeleznitsa. Larvae and pupae of leaf rollers were collected from poplar treesand stump sprouts and were brought in the laboratory where they were reared toadults atroom temperature (18 - 22°C). As a result of this investigation, 14 speciesof leaf rollers were recorded as follows: Archips betulana (Hbn.), A. crataegana(Hbn.), A. padana (Scop.), A. rosana (L.), A. xylosteana (L.), Pandemis heparana(Den. & Schiff.), P. cerasana (Hbn.), Ptycholoma lecheana (L.) (Tortricinae),Cydia exquisitana (Rbl.), Gypsonoma aceriana (Dup.), G. dealbana (Frol.),G. minutana (Hbn.), Hedia salicella (L.) and Pseudosciaphila branderiana (L.)(Olethreutinae ). Eight species - A. betulana, A. padana, A. rosana, C. exquisitana,G. dealbana, P. cerasana, P. lecheana and P. branderiana were reported for thefirst time on poplars in Bulgaria. In tortricid complex studied G. aceriana (69.0%)was the dominant species. C. exquisitana, G. minutana and P. cerasana weresubdominant and the remaining species were less numerous. C. exquisitana isxylophagous - its larvae feed under the bark of poplar trees. The first instar of G.aceriana develops on leaves of poplars. After the first moult larvae enter the youngtwigs. The population density of G. aceriana is highest in Sofia, where an averageof 9.2 larvae/m of sprouts have been recorded in 1997. The insect infested 23.0- 93.7% of the twigs of poplars. The larvae of G. minutana live and feed betweentwo òr more leaves held together by silky threads. The larvae of the remainingspecies roll the leaves. With the exception of G. aceriana, all of the tortricidspecies occurred in low population densities and did not reach pest statusthroughout the period of this study
Лѣтопись: 13-27 August 1980: Sofia. The Second Summer Colloquium on Old Bulgarian Studies
No full textThis feature "Chronicle" reports on recent events in the field of Early Slavic, e.g., celebrations, conferences, symposia, etc. On August 13-27, 1980, the Second Summer Colloquium on Old Bulgarian Studies was held in Sofia. The papers concerned four major topics: codicology, textology, the history of literature, and linguistics. Scholars from Austria, Bulgaria, Canada, Czechoslovakia, Germany, Hungary, Israel, Italy, Japan, the Netherlands, Poland, Switzerland, and the USSR presented. The author provides a brief summary of each presentation.The conference included presentations by the following scholars: I. Codicology – Moshe Altbauer, Aksiniia Dzhurova, O. A. Kniazevskaia, N.V. Kosek, Kujo M. Kuev, S. Smiadovski, Imre H. Tóth, and Bojana Velcheva; II. Textology – Ivan Buiukliev, Ivan Dobrev, Ivan Dujchev, B. Dzhonov, Zoe Hauptová, Klimentina Ivanova, Stefan Kozhukharov, Roland W. Marti, T. Moriyasu, Georgi Popov, Jerzy Rusek, P. Šima, William R. Veder, Slavcho Vŭlchankov; III. History of Literature – Petŭr Dinekov, Emil Georgiev, Christian Hannick, Stefan Kozhukharov, Aleksander Naumow; IV. Linguistics – Moshe Altbauer, Maia Bairamova, Ekaterina Dogramadzhieva, Vladimir I. Georgiev, Ödön Horgosi, Dora Ivanova-Mircheva, Ivan Kochev, Jean-Yves Le Guillou, G. Michel, Leszek Moszyński, I.V. Platonova, Johannes M. Reinhardt, Boris Simeonov, Krassimir Stanchev, W. Stempnjakówna, Radoslav Večerka, and Kapitolina Ivanova Khodova. Two participants presented on the history of science: Rumiana Zlatanova and Przemysƚaw Zwoliński
Physochlaina Species: In Vitro Culture and the Production of Physochlaine and Other Tropane Alkaloids
No full textFactors Influencing the in Vitro Cultivation of Common Bean (Phaseolus Vulgaris L.) Leaf Petioles
No full textLietopis': 10-25 September 1979, Sofia: Seminar on Slavic Paleography and Diplomatics
No full textThis feature "ЛѢТОПИСЬ" ('Chronicle') reports on recent events in the field of Early Slavic studies, e.g., celebrations, conferences, symposia, announcements of forthcoming colloquia, and past study groups, etc.On September 10-25, 1979, the ‘Seminar on Slavic Paleography and Diplomatics’ was held in Sofia, Bulgaria. This seminar was the first of three organized by the Centre international d’information sur les sources de l’histoire balkanique et méditerranéenne (CIBAL) in support of young scholars and for the exchange of information among specialists in the fields of paleography, diplomacy and archeology. The first seminar was held in Sofia (September 10-25, 1979), the second seminar – on Latin paleography – will be held in Rome (November 15 to December 15, 1979), and the third – on Byzantine Paleography – in Thessalonikē, Greece (1980). Scholars from Belgium, Bulgaria, Czechoslovakia, Greece, Hungary, Italy, Poland, Romania, the Soviet Union, the United Kingdom (England), the United States and Yugoslavia were in attendance. The article provides a short summary of each paper given at the conference on paleography. The seminar in Bulgaria was organized by the Bulgarian Academy of Sciences and CIBAL, with the cooperation of the Bulgarian Archeographical Commission and the “SS. Cyril and Methodius” National Library. There were 40 presentations, and practical workshops with manuscripts from the Bulgarian National Library “SS. Cyril and Methodius,” the “Ivan Vazov” National Library (Plovdiv), and Rila Monastery. Participants in the seminar on Slavic Paleography and Diplomatics included: Damian P. Bogdan, Angel Davidov, Petŭr Dinekov, Ivan Dobrev, Ivan Duichev, Aksiniia Dzhurova, Emil Georgiev, Mirjana Grozdanović-Pajić, G. Horváth, Petŭr Ilchev, Klimentina Ivanova, Vera Ivanova-Mavrodinova, Ol’ga A. Kniazevskaia, Khristo Kodov, K. Konstantinova, N. Konstantinova, Elena Kotseva, Geōrgios Panagiōtou Kournoutos, Stefan Kozhukharov, Kuio M. Kuev, Svetlana Kuiumdzhieva, Liliana Mavrodinova, Anissava Miltenova, Aleksander Naumow, Kostadinka Georgieva Paskaleva-Kabadaieva, Donka Petkanova, K. Popescu, Georgi Popov, Bozhidar Raikov, Jerzy Rusek, Stefan Smiadovski, Man’o Stoianov, Francis J. Thomson, Elena Toncheva, Imre Tóth, Vasil Vasilev, Ljupka Vasiljev, Silvia Vătafu-Găitan, Boriana Velcheva, Asparukh Velkov, Era L. Vranousē, and Iordan Zaimov
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