Search results for "DST"
showing 10 items of 178 documents
Slow pyrolysis of an LDPE/PP mixture: Kinetics and process performance
2021
Abstract High- and low-density polyethylene (HDPE and LDPE) and polypropylene (PP) are the most common polymers among plastic waste as they have multiple commercial applications. This study focused on thermal degradation characteristics and kinetic of a plastic mixture with a composition of 92.5 wt% LDPE and 7.5% PP. Thermal decomposition characteristics of the plastic mixture was analysed through thermo-gravimetric analysis (TGA). The overall kinetic of the process was studied using the modified Coats−Redfern method and the Ozawa-Flynn-Wall (OFW) method. The apparent activation energy (E) and pre-exponential factor (A) obtained were 316.0 kJ/mol; 8.09E+21 min−1 and 311.5 kJ/mol; 4.35E+21 m…
Modelling heat transfer-controlled cooling and freezing times: a comparison between computational values and experimental results
2013
Modelling of heat transfer-controlled cooling and freezing time predictions are very important for a good preservation of foodstuffs. In that regard, we used a computer code based on the finite-element method that allowed us to analyse the phase-change of various foodstuffs during their freezing. The model was exercised to predict process times. The results can be used to design high efficiency plants. In this work, the results predicted by the FEM program are compared with the experimental values given in technical literature.
Développement opérationnel en grandes cultures semées en ligne d’une rampe de pulvérisation grande largeur localisée sur le rang
2019
National audience; Pour réduire l’utilisation des herbicides, une des solutions possibles est de ne traiter que le rang en post-levée et de biner l’inter-rang ensuite. Terres Inovia, en collaboration avec la Coopérative Agricole Lorraine, a mis en place des essais au champ sur colza et tournesol avec la rampe localisée Marechal, dans le but de mettre au point cette technique pour des rampes de grande largeur avec une bonne qualité de pulvérisation sur le rang et un type de guidage adapté à des terres à colza, plus irrégulières que les terres à betterave sur lesquelles la rampe avait été développée. L’objectif est également d’évaluer les efficacités de la technique (satisfaction du désherbag…
Is there a need for more effective quality awards for agritourisms?
2010
Biochemical methane potential (BMP) of solid organic substrates: evaluation of anaerobic biodegradability using data from an international interlabor…
2011
Background: This paper describes results obtained for different participating research groups in an interlaboratory study related to biochemical methane potential (BMP). In this research work, all experimental conditions influencing the test such as inoculum, substrate characteristics and experimental conditions were investigated. The study was performed using four substrates: three positive control substrates (starch, cellulose and gelatine), and one raw biomass material (mung bean) at two different inoculum to substrate ratios (ISR). Results: The average methane yields for starch, cellulose, gelatine and mung bean at ISR of 2 and 1 were 350 ± 33, 350 ± 29, 380 ± 42, 370 ± 36 and 370 ± 35 …
Epidemiology and outcomes of hospital-acquired bloodstream infections in intensive care unit patients: the EUROBACT-2 international cohort study.
2023
Purpose: In the critically ill, hospital-acquired bloodstream infections (HA-BSI) are associated with significant mortality. Granular data are required for optimizing management, and developing guidelines and clinical trials. Methods: We carried out a prospective international cohort study of adult patients (≥ 18 years of age) with HA-BSI treated in intensive care units (ICUs) between June 2019 and February 2021. Results: 2600 patients from 333 ICUs in 52 countries were included. 78% HA-BSI were ICU-acquired. Median Sequential Organ Failure Assessment (SOFA) score was 8 [IQR 5; 11] at HA-BSI diagnosis. Most frequent sources of infection included pneumonia (26.7%) and intravascular catheters…
Jūgendstila arhitektūras atspoguļojums latviešu presē 1890-1914
2016
Bakalaura darba tēma „Jūgendstila arhitektūras atspoguļojums latviešu presē 1890-1914”, uzskatāmi akcentē galvenos darba pieturas punktus - laiku, problēmu un apstākļus. Dotais posms sakrīt ar Latvijas celtniecības sākumu. Kā vadošais stils celtniecībā tika izkopts jūgendstils. Jaunās, vēl nebijušās, mākslas vērtības, spēja noteikt pilsētas raksturu. Savukārt šim raksturam ir būtiska nozīme, jo tas vistiešāk attēlo tradīcijas un sabiedrības vērtības visplašākajā vārda nozīmē. Šīs sakritības dēļ, īpaši Rīgas arhitektūrā, vērojams vērienīgs stila iespaids. Dotā tēma ir nozīmīga un aktuāla, tādēļ, ka, mūsdienu izdevumos, jūgendstila arhitektūra, tiek izteikti slavināta, uzsverot tās ievērojamo…
Kan brist i alarmkjeden unngås? : Delphistudie med funn av faktorer som er viktige for kvalitetssikring i et velferdsteknologisk responssenter
2016
Masteroppgave i helse- og sosialinformatikk- Universitetet i Agder, 2016 The future brings with it an increased number of elderly in need of aid or assistance. One way of meeting these challenges is an increased usage of healthcare technological solutions. Through media, it is illustrated that there have been several unfortunate incidents related to the handling of personal alarm systems. This has happened not only when receiving an alarm at the responsecenter, but also with the turn-out at the place of emergency. The goal with this study is to identify important factors that are necessary to secure the quality at the responsecenters when the alarms are received and how they are forwarded a…
The body size of headstarted and wild juvenile European pond turtles (Emys orbicularis)
2018
Headstarting is a popular conservation technique in which animals are raised under artificial conditions, and then released into natural habitat. The objective of this procedure is to grow animals to a size at which they are less vulnerable to predators. However, there is still little empirical evidence for the long-term effectiveness of the technique. Therefore, we compared body size of juvenile “wild” (= not taken to artificial rearing) and headstarted European pond turtles (Emys orbicularis), from two populations (in central and western Poland). Immediately after hatching there were no differences in size of the turtles, but after seven-ten years headstarted turtles were smaller. This so…
Extruded Expanded Polystyrene Sheets Coated by TiO2 as New Photocatalitic Materials for Foodstuffs Packaging
2012
Nanostructured, photoactive anatase TiO2 sol prepared under very mild conditions using titanium tetraisopropoxide as the precursor is used to functionalise extruded expanded polystyrene (XPS) sheets by spray-coating resulting in stable and active materials functionalised by TiO2 nanoparticles. Photocatalytic tests of these sheets performed in a batch reactor in gas-solid system under UV irradiation show their successful activity in degrading probe molecules (2-propanol, trimethylamine and ethene). Raman spectra ensure the deposition of TiO2 as crystalline anatase phase on the polymer surface. The presence of TiO2 with respect to polymer surface can be observed in SEM images coupled to EDAX …