A morphologically distinct intrusive massif emerges from sedimentary Mesozoic/Tertiary cover in Eastern Socotra forming the high Haggier Mts. It is mostly composed of peralkaline a nd hypersolvus granite partly accompanied by gabbroic rocks. Amphibole, the sole mafic mineral of th e granite, shows predominately the arfvedsonite composition, while riebeckite, for which Socotra is reported in most manuals of mineralogy as the "locus typicus", occurs subordinately only. Either Paleozoic or Tertiary age has been assumed for this massif for a long time. In the last decade, however, K/Ar datings have been published clearly showing Precambrian (Ne oproterozoic) age. The present authors confirm with somewhat modified results this statement by five new radiometric measurements of monomineral amphibole fractions yiel ding values of 687 to 741 Ma for granites and 762 Ma for gabbroic rocks. The massif represents an isolated segment of numerous late postorogenic Pan-African A-granite bodies piercing the Nubian-Arabian Shield an d is explained as the result of partial melting of Pan-African calc-alkaline shield rocks in the closing stage of the orogeny., Ferry Fediuk and Kadosa Balogh., and Obsahuje bibliografické odkazy
The diversity of freshwater and inland saline planktic cyanoprokaryote microflora (cyanobacteria, cyanophytes) in Mexico depends on the wide variation of the biotopes in this country. There are no detailed studies, describing the planktic cyanoprokaryotic species from this region. This paper lists 51 planktic morphospecies, which were found in various water bodies in central Mexico during May 1992 and March-September 1993. Four new species (Cyanobacterium lineatum, Cyanotetras aerotopa, Anabaena fallax, Cylindrospermopsis taverae) are described, and important species commented. Various species characteristic for various types of reservoirs (volcanic lakes, lakes and artificial reservoirs with diverse trophic levels, hypertrophic pools, saline coastal lakes) were found. Taxonomic and ecological elaborations of the planktic cyanobacteria of Mexico (from an ecological, geographical as well as sanitary point of view – eutrofication, biomass production, toxicity) are urgently needed.
The aim of this paper is the determination of six orbital elements if two positions (1 and 2) of a solar system body are known. The task was solved using the ratio of the elliptical sector to the area of the corresponding triangle. This relationship was labelled as η and derived by K. F. Gauss (1809), see sections 1 and 2. This paper presents four easy methods that supply the ratio, see section 3. These methods simplify this task by removing long and very complicated derivations and by clarifying the theory and calculations. The methods are not used in the case of more than two observations., Josef Kabeláč., and Obsahuje bibliografii
The present study proposed procedure for predicting an optimal left and right ventricular pacing interval delay (V-V interval). In 16 patients (heart failure, left bundle branch block, biventricular pacing) two methods (A and B) identifying optimal V-V interval were tested. Method A: predicted optimal V-V interval A (POVV-A) = electromechanical delay of the segment paced by left ventricle lead minus electromechanical delay of the segment paced by right ventricle lead. Method B: predicted optimal V-V interval B (POVV-B) = difference in the onset of aortic and pulmonary flows. Both methods were validated using echocardiography and right-sided heart catheterization. Cardiac output during POVV-A (4.6 l.min-1 ) was significantly better than that during POVV-A minus 20 ms (4.3 l.min-1, p<0.01) and POVV-A plus 20 ms (4.3 l.min-1 , p<0.01), and than that during POVV-B (4.4 l.min-1, p<0.05). LV dP/dt during POVV-A (818 mm Hg.s-1 ) exceeded that during POVV-A plus 20 ms (717 mm Hg.s-1 , p<0.05) and POVV-A minus 20 ms (681 mm Hg.s-1, p<0.05), and that during POVV-B (727 mm Hg.s-1 , p<0.01). The time difference in onsets of myocardial deformation of left ventricle segment paced by the left ventricle and right ventricle lead allows identifying the optimal V-V interval and improves left ventricle performance., M. Novák, J. Lipoldová, J. Meluzín, J. Krejčí, P. Hude, V. Feitová, L. Dušek, P. Kamarýt, J. Vítovec., and Obsahuje bibliografii a bibliografické odkazy
Contributions by correspondents of Czech Ethnographical Society create a new section of Ethnographical Bulletin. A lot of valuable field information has been acquired in this way over the years.
Zdeněk Škorpík writes in his text Icing about already extinct practice connected in the past primarily with innkeeping and business. The ice which was broken in pieces during winter was transferred to specially adapted rooms where it was used for keeping food and drinks cool until next winter. The practice of icing in Silůvky stopped at the end of the 1940s.
The article by another correspondent, František Pešík from Brdo in Plzeň region, brings a detailed description of making wooden rakes used on farms (Rakes). Simple technological process and instruments were used by rake making in domestic conditions.
Rakes differed according to the purpose for which they were used: narrow ones served for hay tedding, wider ones for raking stubble fields and there were also special rakes for tedding barley and oat. and Tento abstrakt je společný pro 2 předchozí články zařazené do oddílu Příspěvky dopisovatelů České národopisné společnosti
A newly established section containing contributions by the correspondents of the Czech Ethnographical society profiles one of the oldest, and nonetheless still active, correspondent František Pešík (born in 1916) from Brdo, a small village close to Manětín. Many of his manuscripts are placed in society’s archive. Some of them have already been published. The author of Pešík’s profile titled František Pešík and His Cooperation with the Ethnographical
Society M. Válka describes his life story as well as his areas of interest. From the beginning of the 1970s, Pešík continued towards the enrichment of Ethnographical society’s archive by his contributions from different areas of regional history, traditional folk culture and contemporary village life. The actual text by František Pešík Religious Processions in Manětín until the Year 1953 deals with religious processions which took place in Manětín in the first half of the twentieth century and earlier, as well as with their contemporary form. He gives detailed account of processions on the Resurrection Day, Easter Vigil (on Holy Saturday), Corpus Christi, feast of St. Mark, Rogation Days, feast of the Holy Trinity, the so called “walking with a star”, etc. He takes notice of individual stations, actions of worship, prayers and priest’s speeches. Another sphere of interest covers pilgrimages - to Plasy, Skoky u Žlutic and Svatá Hora u Příbrami. He pays close attention to interesting personality connected to this phenomenon - the singer Vojtěch Havel. and Tento abstrakt se vztahuje k 2 předchozím článkům uvedeným v oddílu Příspěvky dopisovatelů České národopisné společnosti