MAN 2-2 1/2 tonnin yhdistetty kuorma- ja henkilö-auto

kuv., 24 x 16 cm

MAN 2-2 1/2 tonnin varustettu käsikieppauslaitteella

kuv., 24 x 16 cm

4 1/2 tonnin MAN kuorma-auton käyttö- ja hoito-ohjeet malli ML 4500 S (Moottori D 1040 G)

kuv., 14 x 21 cm

MAN-diesel kuormavaunun rakenne tyyppi E

21 x 29 cm

Protos är automobilen på vilken man under alla omständigheter kan lita

kuv., 23 x 16 cm

Protos är automobilen på vilken man under alla omständigheter kan lita

kuv., 23 x 16 cm

Protos är automobilen på vilken man under alla omständigheter kan lita

kuv., 23 x 16 cm

"Litteraturen, det är vad man undervisar om" : det svenska litteraturdidaktiska fältet i förvandling

Under slutet av 1900-talet och början av 2000-talet har ett nytt litteraturdidaktiskt forskningsfält vuxit sig allt starkare i Sverige, samtidigt som litteraturens ställning i samhälle och skola har försvagats. För att söka förstå en sådan paradox undersöker Peter Degerman hur frågor om litteraturens legitimitet och funktion besvaras i den litteraturdidaktiska forskningen. Varför bör vi egentligen läsa och studera skönlitteratur, och vad kan en litteraturpedagogisk forskning säga oss om litteraturens värde? Avhandlingens analysmetod är inspirerad av Michel Foucault, såväl begreppsligt som i genomförandet, vilket betyder att undersökningen framför allt riktar in sig på litteraturdidaktiken i termer av ett ”spridningsmönster” av ett antal ”diskursivt formerade vetenskapliga utsagor” som konstruerar sitt objekt eller en ”objektdomän” – ”en korpus av påståenden som hålls för sanna”. Litteraturdidaktikens huvudsakliga objektdomän, dess utskilda objekt, är litteraturläsningen. Det som gör litteraturdidaktiken till vetenskap – connaissance – är dess speciella avgränsning mot andra vetenskapliga områden, samtidigt som litteraturdidaktiken, som connaissance är beroende av förhållandet till ett speciellt episteme – ett större diskursivt fält som möjliggör vetenskapen. En ny vetenskap, som litteraturdidaktiken, uppstår i brottet mot ett större samhälleligt vetande, ett vetande vilket i detta fall kan återfinnas i utbildningssystemet, politiska opinioner, massmediala debatter etc. Det som är möjligt att säga inom området för litteraturdidaktik eller litteraturpedagogik begränsas emellertid av det som i avhandlingen benämns ”klassrummets princip”. Förhållandet mellan skilda litterära repertoarer – exempelvis mellan lärare och elev – eller mellan subjektiva och objektiva läsningar, mellan olika texttyper, knyts till klassrummet i betydelsen av en kontext för den pedagogiska situationen. Ytterst sett är det den litteraturdidaktiska forskningens relevans för klassrummets praktik som avgränsar den litteraturdidaktiska domänen.

Assessing bovine babesiosis in Rhipicephalus (Boophilus) microplus ticks and 3 to 9-month-old cattle in the middle Magdalena region, Colombia

Babesia sp. is a protozoan hemoparasite that affects livestock worldwide. The Colombian Middle Magdalena is an enzootic region for babesiosis, but there is no previous research providing detail on its transmission cycle. This study aims to assess some Babesia sp. infection indicators in cattle and ticks from the area, by using direct microscopic and molecular techniques to detect the infection. In the cattle, 59.9% and 3.4 % positivity values for B. bigemina and mixed infection (B. bovis + B. bigemina) were found respectively. In ticks, the positivity of B. bigemina reached 79.2% and 9.4% for the mixed infection. The degree of infestation in the region was 3.2 ticks per bovine. There was positive correlation between tick control acaricide frequencies and infestation in bovines. This leads us to infer that control periodicity greater than 90 days, in stable zones, is an abiotic factor that benefits the acquisition of protective immunity in calves, the natural control of the infection and eventual disease absence. It is necessary to monitor the disease by applying new entomological and parasitological indicators showing the complexity of this phenomenon.

Effect of zone and crops rotation on Ischaemum rugosum and resistance to bispyribac-sodium in Ariari, Colombia

The objectives of this research were to evaluate (1) weed species presented in rice fields in relation to the geographical zone and crop rotation and (2) the resistance level of Ischaemum rugosum to the herbicide bispyribac-sodium. For the first objective, were sampled 79 commercial fields of rice to establish weed density, coverage, and rotation system in the evaluated fields with record of bispyribac-sodium application of at least five years. To reach the second objective, the seeds were collected from plants in commercial fields with different control levels of bispyribac-sodium herbicide. Seeds were germinated in trays under controlled conditions. When plants presented three leaves these were treated with bispyribac-sodium at different doses. Percentages of control and dry weight of plants were evaluated 12 days after treatments (dat). Dominant species in evaluated fields was I. rugosum, with a frequency of 100%, presenting escapes to different chemical commercial treatments. No significant differences were recorded between rotation systems, nevertheless, the most of I. rugosum population was found in the system rice-fallow-rice. The response of applications at different concentrations allows concluding that 65% of samples had resistance at different degrees reported as indexes from 2 to 42 which are related to rotation systems.

EFFECT OF POST-EMERGENCE HERBICIDE APPLICATIONS ON RICE CROP WEED COMMUNITIES IN TOLIMA, COLOMBIA

ABSTRACTThe weed communities of agricultural systems are dynamic and respond to changes in agronomic practices. This study aimed to evaluate the effect of post-emergence herbicide control programs made by farmers on weed communities and commercial lots of rice. The evaluations were carried out in 96 commercial lots located in the Centro, Meseta and Norte zones of the department of Tolima. In each lot, 1 ha was marked off, in which the evaluations were carried out by randomly throwing a 0.2 x 0.2 m sampling-square 5 times. Samples were taken before the first post-emergence application, after the first post-emergence application, after the second post-emergence application, and once the post-emergence applications were finished. The evaluated variables included density and cover of the weeds and the crops. The IVI of each species was calculated and the control program was analyzed in terms of decreases in the number of individuals for the 15 more encountered species. Before the applications, higher density values were found. The first and second post-emergence applications reduced the average density by 41% and 12%, respectively, throughout the department. Between the first and fourth evaluations, the density of the weeds and crops decreased throughout the department by 51.7% and 39%, respectively. The weed density variable proved to be the most influential in the populations after the herbicide programs were carried out.

La política por los espiritus: escenarios multiculturales en "zonas de contacto" (Valle de Cauca, Colombia)

Basado en una reciente investigacion etnografica entre los Embera-Chami de la région plurietnica del Valle del Cauca (Colombia) el examen de escenarios de encuentros interénicos encuadrados por la legislacion multicultural permite vislumbrar la paradojica interdependencia entre la institucionalizacion de un concepto culturalista singularizante de "la" cultura y la homogeneizacion politica de los grupos etnicos. La "estatizacion" de las relaciones inter-étnicas, concomitante a la competicion por la visibilidad, entre grupos de igual estatus en la legislacion nacional e internacional aparecen como dimensiones emergentes del campo interétnico, mientras que se confirma el papel performativo de la ritualizacion en la circulacion y la apropriacion de discursos y practicas. Los escenarios descritos que corresponden a múltiples situaciones semejantes evidencian también que la apropiación multidireccional y uso contextual de conceptos genéricos provenientes del espacio académico, nacional e internacional - como "médico tradicional", "derecho ancestral", "reforzamiento cultural", o "chamanismo" - construyen campos de paradojas. Permiten a los actores étnicos de construir y visibilizar una singularidad cultural aislacionista conforme al concepto oficializado de "cultura" pero al mismo tiempo empujan a una mayor apertura de las "zonas de contacto" interétnicas donde circulan una mayor variedad de prácticas y discursos que antes de la institucionalización del multiculturalismo.

Amerika: en handbok för menige man

"Copyrighted" af K. Zilliacus och öfverflyttad på Dr. A. Owen.

Neutralization of the edema-forming, defibrinating and coagulant effects of Bothrops asper venom by extracts of plants used by healers in Colombia

We determined the neutralizing activity of 12 ethanolic extracts of plants against the edema-forming, defibrinating and coagulant effects of Bothrops asper venom in Swiss Webster mice. The material used consisted of the leaves and branches of Bixa orellana (Bixaceae), Ficus nymphaeifolia (Moraceae), Struthanthus orbicularis (Loranthaceae) and Gonzalagunia panamensis (Rubiaceae); the stem barks of Brownea rosademonte (Caesalpiniaceae) and Tabebuia rosea (Bignoniaceae); the whole plant of Pleopeltis percussa (Polypodiaceae) and Trichomanes elegans (Hymenophyllaceae); rhizomes of Renealmia alpinia (Zingiberaceae), Heliconia curtispatha (Heliconiaceae) and Dracontium croatii (Araceae), and the ripe fruit of Citrus limon (Rutaceae). After preincubation of varying amounts of each extract with either 1.0 µg venom for the edema-forming effect or 2.0 µg venom for the defibrinating effect, the mixture was injected subcutaneously (sc) into the right foot pad or intravenously into the tail, respectively, to groups of four mice (18-20 g). All extracts (6.2-200 µg/mouse) partially neutralized the edema-forming activity of venom in a dose-dependent manner (58-76% inhibition), with B. orellana, S. orbicularis, G. panamensis, B. rosademonte, and D. croatii showing the highest effect. Ten extracts (3.9-2000 µg/mouse) also showed 100% neutralizing ability against the defibrinating effect of venom, and nine prolonged the coagulation time induced by the venom. When the extracts were administered either before or after venom injection, the neutralization of the edema-forming effect was lower than 40% for all extracts, and none of them neutralized the defibrinating effect of venom. When they were administered in situ (sc at the same site 5 min after venom injection), the neutralization of edema increased for six extracts, reaching levels up to 64% for C. limon.