Search results for "Dahl"

Suppressiveness of 18 composts against 7 pathosystems : variability in pathogen response

2006

International audience; Compost is often reported as a substrate that is able to suppress soilborne plant pathogens, but suppression varies according to the type of compost and pathosystem. Reports often deal with a single pathogen while in reality crops are attacked by multiple plant pathogens. The goal of the present study was to evaluate the disease suppression ability of a wide range of composts for a range of plant pathogens. This study was conducted by a consortium of researchers from several European countries. Composts originated from different countries and source materials including green and yard waste, straw, bark, biowaste and municipal sewage. Suppressiveness of compost-amende…

A microscale Kjeldahl nitrogen determination for environmental waters.

2008

A microscale Kjeldahl system has been designed which has been homemade reduced. The digestor unit of a macroKjeldahl system and a modified glassware microdistillation unit have been used. The optimal conditions for digestion and distillation have been established for ammonium and methylamine as model compound of organic amino nitrogen. The optimised procedure has been applied to the determination of Kjeldahl nitrogen in water samples. Recoveries near 100% and good precision have been achieved. This procedure combines nitrogen miniaturized system and the use of a selective ion electrode for ammonia detection. The analysis time was reduced 4.8 times and the analysis cost 6.6 times compared wi…

Detailed internal characterisation of two Finnish landfills by waste sampling

2006

The aim of this study was to characterise the internal structure and composition of landfilled waste at two Finnish landfills to provide information for active and post-landfill operations. The two sites, Ammässuo and Kujala, have been in operation for 17 and 48 years, respectively. Waste was sampled (total 68 samples) and analysed for total solids (TS), volatile solids (VS), total Kjeldahl nitrogen (TKN), biological methane potential (BMP) and leaching of organic material (determined as chemical oxygen demand, COD) and ammonium nitrogen (NH(4)-N). The results showed high vertical and horizontal variability, which indicated that both the waste composition and state of degradation varied gre…

Metagenomic dynamics in Olea europaea after root damage and Verticillium dahliae infection

2019

AbstractThe olive tree is of particular economic interest in the Mediterranean basin. Researchers have conducted several studies on one of the most devastating disorders affecting this tree, the Verticillium wilt of olive, which causes significant economic damage in numerous areas of this crop. We have analyzed the temporal metagenomic samples of a transcriptomic study in Olea europaea roots and leaves after root-damage and after a root Verticillium dahliae infection (Jimenez-Ruiz et al. 2017). Our results indicate that this infection, although led by Verticillium, is driven not by a single species but by a polymicrobial community, including their natural endophytes, which acts as a consort…

"Word is oh such a twich-tickling problem" : anomalous features in Roald Dahl's The BFG and its Finnish translation

1999

Tykkimies Lars Dahlberg (1746-1818) : tapaustutkimus ruotsalaistaustaisen sotilaan etsimisestä ja Suomeen jäämisen syistä

2019

Determining the optimal sowing period at a variety from Dahlia variabilis species from Mignon group

2010

Planted in addition to walls, to the south of the massif, in groups, beats or lawns, Dahlia beautifully decorates parks and gardens, The rebates are used especially varieties with small waist [6]. Today, when the development of green spaces is a real concern of people, we consider important to provide technology for the production of plants that can offer the widest possible variety of species with the widest possible decor period. Thus, the present article presents researches about determining the period of sowing for dwarf dahlias produced in pots, with spring and early summer flowering and used for decoration in green areas. In this experiment were taken in the account characters such se…

Selective determination of ammonium in water based on HPLC and chemiluminescence detection

2005

Abstract A selective and sensitive method has been developed for liquid chromatographic determination of ammonium in water samples. The analyte is derivatized with Dansyl Chloride prior to injection into HPLC. Optimal solution derivatization conditions have been established. The dansyl derivative is separated with the aid of a chromatographic column and post-column mixed with peroxyoxalate (TCPO) and H 2 O 2 in order to perform chemiluminescence detection. The detection limit achieved is 8 μg/L and linear response from 0.027 to 0.750 mg/L of ammonium was obtained. Ammonium ion was determined within 2.4 min under optimum chromatographic conditions. The method is fast, and near 10 derivatized…

Drift ice in Daugava (14.04.1905)

1905

K. R. Kupfera 1905. gada 14 aprīlī fotografētā ledus iešana Daugavā pie Doles salas ar autora aprakstu. K. R. Kupfer's photographed drift ice in Daugava near Dole Island on 14. April 1905, with an autor's description. K. R. Kupfer fotografierte am 14. April 1905 Eisgang in der Daugava bei Dole Island mit einer Beschreibung vom Autor.

Ledus iešana Daugavā (aprīlis 1905)

1905

K. R. Kupfera 1905. gada aprīlī fotografētā ledus iešana Daugavā pie Doles salas ar autora aprakstu. K. R. Kupfer's photographed drift ice in Daugava near Dole Island on April 1905, with an autor's description. K. R. Kupfer fotografierte am April 1904 Eisgang in der Daugava bei Dole Island mit einer Beschreibung vom Autor.