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Search Results: 1 - 10 of 4927 matches for " Camargo-Dietrich "
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Popula??o e território de forrageamento de uma col?nia de Heterotermes tenuis (Hagen) (Isoptera, Rhinotermitidae)
Camargo-Dietrich, Célia Regina Rodrigues de;Costa-Leonardo, Ana Maria;
Revista Brasileira de Zoologia , 2003, DOI: 10.1590/S0101-81752003000300006
Abstract: heterotermes tenuis (hagen, 1858) is a subterranean termite that cause damage in forests, crops and urban areas. the population and foraging territory of an urban colony were determined using triple mark-release-recapture technique. foraging population was estimated in 134,583 ± 5,803 individuals. the foraging territory encompassed an area of 175,5 m2 and the maxim linear foraging distance was 36 m.
Comportamento intra-específico do cupim Heterotermes tenuis (Hagen) (Isoptera, Rhinotermitidae) em condi??es de laboratório
Camargo-Dietrich, Célia R.R. de;Costa-Leonardo, Ana Maria;
Revista Brasileira de Zoologia , 2000, DOI: 10.1590/S0101-81752000000200013
Abstract: groups of heterotemies tenuis (hagen, 1858) from five infestation points were paired in bioassays to investigate the intercolony aggression. the combinations of arena sizes (petri dishes of 6.0 and 9.0 cm) and temperatures (25 and 28 oc) were assessed for effects on intraspecific agonism. agonistic behavior was scored positive in arena if more than half of the starting number of termites was dead and injured after 17 hours. after the intraspecific encounters it was possible to delimitate three colonies from the five infestation points. no significant differential survival was seen in two different arena sizes and two different temperatures. these assays indicate that the factors governing the agonistic behavior in h. tenuis are complex and seems to be dependent on environmental conditions and individual characteristies (age, size and caste).
Popula o e território de forrageamento de uma col nia de Heterotermes tenuis (Hagen) (Isoptera, Rhinotermitidae)
Camargo-Dietrich Célia Regina Rodrigues de,Costa-Leonardo Ana Maria
Revista Brasileira de Zoologia , 2003,
Abstract: Heterotermes tenuis (Hagen, 1858) is a subterranean termite that cause damage in forests, crops and urban areas. The population and foraging territory of an urban colony were determined using triple mark-release-recapture technique. Foraging population was estimated in 134,583 ± 5,803 individuals. The foraging territory encompassed an area of 175,5 m2 and the maxim linear foraging distance was 36 m.
The marimba: musical and secret language of the political violence in Guatemala La marimba: lenguaje musical y secreto de la violencia política en Guatemala
Wolfgang DIETRICH,Wolfgang DIETRICH
América Latina Hoy , 2010,
Abstract: The author reflects the construction of national music while the arise of the nation State in Guatemala. This development begins formally while the first decades of the nineteenth century and has not finished yet. For the myth of the Nation state and those who use it for their project of domination it is crucial that national music can be distinguished externally from musics generated by other nations while it can be applied internally for the aim of national homogenisation. Since the middle of the nineteenth century the music is used in Guatemala for the dissemination of ideologies that help to construct this myth. The vernacular music of the Maya people does not follow this logic. Hence it is considered inferior or incorrect . For the myth of the nation State only the totality of the people as an abstract concept can understand and appreciate the national music, but not the concrete or individual group. Assuming this the music is converted into an important tool of a repressive mechanism and deculturation. The marimba thus is the symbol of the nation State in Guatemala. The dictatorships of the army, who were the main responsible of the genocide of the Maya people, declared the chromatic marimba symbol of the nation. After a long history of violence the marimba desindianizada and therefore ladinizada reached the status of the national instrument. While the period of violence the chromatic marimba never ceased to sound in the nightclubs and the elegant restaurants of the Capital. In the meanwhile the Mayas of the highlands hided their K’ojomes in caves and ca ons to protect them from the army. Therefore the anarchic and rebellious diversity of the k’ojom’s tuning continues to be the vernacular and secret language of groups and individuals who do not belong to the national reality of the chromatic marimba. El autor refleja la construcción de la música nacional en el proceso del devenir del Estado nacional guatemalteco. Este proceso comienza formalmente a principios del siglo XIX, pero no ha concluido aún. Para el mito del Estado nación y para aquellos que lo utilizan para su proyecto de dominación, es de importancia d
Origins and Development of Initiation of Free Radical Polymerization Processes
Dietrich Braun
International Journal of Polymer Science , 2009, DOI: 10.1155/2009/893234
Abstract: At present worldwide about 45% of the manufactured plastic materials and 40% of synthetic rubber are obtained by free radical polymerization processes. The first free radically synthesized polymers were produced between 1910 and 1930 by initiation with peroxy compounds. In the 1940s the polymerization by redox processes was found independently and simultaneously at IG Farben in Germany and ICI in Great Britain. In the 1950s the systematic investigation of azo compounds as free radical initiators followed. Compounds with labile C–C-bonds were investigated as initiators only in the period from the end of the 1960s until the early 1980s. At about the same time, iniferters with cleavable S–S-bonds were studied in detail. Both these initiator classes can be designated as predecessors for “living” or controlled free radical polymerizations with nitroxyl-mediated polymerizations, reversible addition fragmentation chain transfer processes (RAFT), and atom transfer radical polymerizations (ATRP).
History and Diagnostic Significance of C-Peptide
Dietrich Brandenburg
Experimental Diabetes Research , 2008, DOI: 10.1155/2008/576862
Abstract: Starting with the epoch-making discovery of proinsulin, C-peptide has played an important interdisciplinary role, both as part of the single-chain precursor molecule and as an individual entity. In the pioneering years, fundamental systematic experiments unravelled new biochemical mechanisms and chemical structures. After the first detection of C-peptide in human serum, it quickly became a most useful independent indicator of insulin biosynthesis and secretion, finding application in a rapidly growing number of clinical investigations. A prerequisite was the development of specific immuno assays for proinsulin and C-peptide. Further milestones were: the chemical synthesis of several C-peptides and the accomplishments in the synthesis of proinsulin; the detection of preproinsulin with its bearings on understanding protein biosynthesis; the pioneering role of insulin, proinsulin, C-peptide, and mini-C-peptides in the development of recombinant DNA technology; and the discovery of the enzymes for the endoproteolytic processing of proinsulin into insulin and C-peptide, completing the pathway of biosynthesis. Today, C-peptide continues to serve as a special diagnostic tool in Diabetology and related fields. Thus, its passive role is well established. Evidence for its active role in physiology and pathophysiology is more recent and is subject of the following contributions.
What on earth is APRV?
Dietrich Henzler
Critical Care , 2011, DOI: 10.1186/cc9419
Abstract: Airway pressure release ventilation (APRV) was described more than 20 years ago [1] as a mode that allows spontaneous breathing throughout the ventilation cycle. APRV is a time-cycled alternant between two levels of positive airway pressure, with the main time on the high level and a brief expiratory release to facilitate ventilation. As such, APRV may be considered a partial ventilatory support modality that has the ability to deliver the full work of breathing if needed. Although it seems that APRV is well defined, the characteristics are surprisingly unspecific, as is the way APRV is used.Different perceptions of this mode may exist around the globe. While 'APRV' is common to users in North America, a very similar mode, biphasic positive airway pressure (BIPAP), was introduced in Europe [2]. The term APRV has also been used in American journals where, from the ventilation characteristics, BIPAP would have been the more adequate terminology [3]. To further confusion, BiPAP? (with a small 'i') is a registered trade-mark for a noninvasive ventilation mode in a specific ventilator (Respironics Inc.). Other names (BILEVEL, DUOPAP) have been created for legal reasons. Although similar in modality, these terms share the same shortcomings: they describe how a mode is intended to inflate the lung, rather than defining the characteristics of synchronization or the way spontaneous breathing efforts are supported.The perceived differences between APRV and BIPAP have been described previously [4,5]. Essentially, APRV has a longer time phase on the high pressure level, while BIPAP usually does not exceed an inspiration:expiration time ratio of 1:1 [5]. Expiratory lung collapse is prevented in APRV by creating intrinsic positive end-expiratory pressure (PEEP) during the short expiration, while in BIPAP the PEEP is directly set with the lower pressure level. BIPAP can be applied in different ways: with unsynchronized, unsupported interfacing of spontaneous breaths ('genuine' BIP
Continued Growth of the Impact Factors of MDPI Open Access Journals
Dietrich Rordorf
Molecules , 2010, DOI: 10.3390/molecules15064450
Abstract: We are pleased to report the continued increase of the Impact Factors of MDPI journals in 2009 (see Table 1 and Figure 1). As noted in a similar Editorial published in June 2009, the Impact Factors of MDPI journals have been steadily recovering since the inception of the full Open Access publishing policy in early 2007 [1]. We are pleased to see that all journals now have an Impact Factor much higher than 1. In 2011 the Journal Citation Report (JCR) will include the first official Impact Factor of Entropy , and in 2012, the International Journal of Environmental Research and Public Health will be included for the first time. Nevertheless, we are already able to compute a preliminary impact factor of approximately 1.4 for Entropy [2]. [...]
Sustained Growth of the Impact Factors of MDPI Open Access Journals
Dietrich Rordorf
Molecules , 2012, DOI: 10.3390/molecules17021354
Abstract: Following the tradition established during the past two years [1,2], we are pleased to report the newly released Impact Factors of MDPI open access journals by the means of an editorial. This year’s edition of the Journal Citation Reports (JCR), which is published annually by Thomson Reuters, includes seven journals published by MDPI, including three that received their first official Impact Factors – Energies, Entropy, and more surprisingly Viruses – the latest with citation data from 2009 only. We are pleased to announce that the continued growth in Impact Factors reported during the past two years has been sustained, and Impact Factors of MDPI journals continue on a growth path. Table 1 reports the latest Impact Factors for 2010. Figure 1 graphically depicts the evolution of the Impact Factors for the four MDPI open access journals that have received Impact Factors in the past. Table 2 reports the ranking of the MDPI journals within the subject categories of the Science Citation Index Expanded (SCIE). [...]
World records in the size of simulated Ising models
Stauffer, Dietrich;
Brazilian Journal of Physics , 2000, DOI: 10.1590/S0103-97332000000400029
Abstract: monte carlo simulations with up to 1765 spins confirm the chen-dohm theory for the five-dimensional ising model. also world record sizes 10001922; 99843; 8804; 486 and 217 spins were simulated in the literature, and we describe the needed multi-spin coding algorithm.
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