2 183 uppsatser · sida 1 av 60
effekt av plantstorlek och behandling med metyljasmonat
Two field experiments were conducted in central Sweden in order to: 1) Determine a relationship between the number of approaching pine weevils (Hylobius sp.) and the number of attacks by pine weevils, in relation to the size of seedlings of Scots pine (Pinus sylvestris). 2) …
… weevil (Hylobius abietis) in Scots pine and Norway spruce seedlings. A field experiment was conducted in order to determine the dose-response effects of methyl jasmonate (MJ) on growth and defence to pine weevils in Scots pine (Pinus sylvestris) and Norway spruce (Picea abies) …
… att redogöra hur förskollärare ser på och använder sig av naturvetenskapliga experiment i förskolan. Studien ska ta fram vilka motiv och målsättningar en förskollärare har inför en aktivitet med experiment. Tidigare forskning visar att naturvetenskap och teknik inte varit så …
avskiljning med mineraliska filtermaterial
… slag with CaO, sand covered with iron oxides, olivine and nepheline. The experiment was carried out in two sets, starting with batch experiments followed by a column study. The objective of the batch experiments was to find out how variations in pH affected the sorption capacity …
Detta examensarbete behandlar pedagogers syn på experiment i skolans tidigare år i naturvetenskapsundervisningen. Vårt huvudmål med examensarbetet var att undersöka faktorerna som underlättar respektive försvårar utförande av experiment i undervisningen för grundskolepedagoger …
… are of particular interest. The present study is a complement to a pot experiment that investigated the potential of different waste products for use as fertilizers and how they affect the microbial community. In the pot experiment, the clearest treatment change in microorganism …
… and biosludge mixed with paper fiber was studied. This was done by batch experiments in a laboratory environment to examine the gas production and composition of the produced gas. Biogas production is a complex anaerobic digestion process in which various microorganisms …
En experimentell studie om fysisk aktivitets påverkan på uppmärksamhet
… and after physical activity. The method used in this study was made of an experimental design. The participants were chosen through a cluster sampling and thereafter divided into a control group and an experimental group. A total of 64 pupils from upper secondary school …
… kognitiva förmågor kan ge oss kunskap om när deras välfärd kan vara hotad. Två experiment utfördes i syfte att undersöka om hönor kan ha deklarativa representationer av ett sandbad. Före experimenten depriverades hönorna från sandbad för att öka deras motivation. I experiment 1 …
… undersöker hur och på vilka sätt som användare deltar i traditionell och experimentell systemutveckling. I samband med denna undersökning har intervjuer med personer från sex IT-företag utförts för att fastställa vilka uppfattningar och syner företagen har på dessa två …
… relieve the trouble. The examine work included both a literature research, an experimental test, concerning a comparison of different teat sprays and also an inquiry-research about the occurrence of warts in practical herds in order to collect as much facts as possible. Three …
… grass in milk production in the north of Scandinavia. To do this, a grazing experiment was planed and performed during the summer 2005. Simulations in the DSS were run to get a suggestion of how the cows should graze, grazing calendar 1. Deviations and updates during the season …
en studie av ingruppskorrektion
… in-group. Does Swedes correct their estimations of their own group when the experiment leader is of another ethnicity and has a different colour of skin? The participants were students at Halmstad Högskola and they were all born and raised in Sweden. Half the participants got to …
… of normal seed rate for the pure crop) and pea/oat (70/30) was grown in field experiments both 2002 and 2003. The following year, 2004, the pea/oat crop was excluded and instead field bean and spring wheat was cultivated in three different mixed ratios (field bean/spring wheat …
… to 14 % of its total forest area. Exotic lodgepole pine has in previous experimental stands shown a superior growth than the native Scots pine (Pinus sylvestris L.) (”S”).But also the comparison could be questioned because stand histories were was unknown and also differences in …
