Search results for "esm"
showing 10 items of 496 documents
Calcification is not the Achilles'heel of cold-water corals in an acidifying ocean
2015
Ocean acidification is thought to be a major threat to coral reefs: laboratory evidence and CO2 seep research has shown adverse effects on many coral species, although a few are resilient. There are concerns that cold-water corals are even more vulnerable as they live in areas where aragonite saturation (Omega ara) is lower than in the tropics and is falling rapidly due to CO2 emissions. Here, we provide laboratory evidence that net (gross calcification minus dissolution) and gross calcification rates of three common cold-water corals, Caryophyllia smithii, Dendrophyllia cornigera, and Desmophyllum dianthus, are not affected by pCO2 levels expected for 2100 (pCO2 1058 µatm, Omega ara 1.29),…
Distribution of clozapine and desmethylclozapine between blood and brain in rats.
1999
Desmethylclozapine is the major metabolite of clozapine in serum. Although the metabolite is pharmacologically active in vitro, the occurrence of desmethylclozapine in brain under steady-state conditions and its role for clinical actions of clozapine are unclear. In this study 20 male Sprague-Dawley rats received five oral doses of clozapine 20 mg/kg at 1.5-h intervals. At 0.5, 1, 2 and 5 h after the last administration, at a time four animals were killed for analysis of clozapine and desmethylclozapine concentrations in serum and brain. The treatment yielded steady-state serum concentrations of clozapine that are considered as therapeutically effective in man. Desmethylclozapine concentrat…
Adverse drug reactions in some African herbal medicine: literature review and stakeholders’ interview
2014
International audience; Background: In view of the large consumption of herbal medicine in Africa countries, it is likely that many adverse drugs reactions go unrecorded with either patients failing to present to health services, or no pharmacovigilance analysis being made, or the analysis not being reported centrally. This problem is of interest especially for those who are working in the general area of adverse drug reactions or stakeholders in the domain of herbal medicine for considering safety issues. Methods: We are particularly interested in the way that the use of very wellknown and highly valued plants is linked to the observation of adverse drug reactions in African countries. We …
Padomju Latvijas Dziesmu svētku atspoguļojums LPSR presē (1950-1960)
2016
Bakalaura darba „Padomju Latvijas Dziesmu svētku atspoguļojums LPSR presē (1950-1960)” mērķis ir izpētīt II, III un IV Padomju Latvijas Dziesmu svētku atspoguļojumu presē, analizējot, kādi bija galvenie jautājumi, kuriem pievērsa uzmanību centrālā, kā arī reģionu latviešu un krievu prese, vai un kā to atspoguļojums mainījās gadu gaitā destaļinizācijas ietekmē. Pētījuma rezultātā iegūtie kvantitatīvie rādītāji liecina, ka visvairāk rakstu ir publicēti saistībā ar II Padomju Latvijas Dziesmu svētkiem, kas notika staļinisma periodā. Saturiski 1950.gada presē valda pozitīvi vērtējumi un izteikti ideoloģiska Staļina un padomju varas slavināšana. Destaļinizācijas perioda presē veikta gan pozitīva…
Plānotāju dizaina vizuālā stilistika
2021
iplomdarba tēma ir “Plānotāju dizaina vizuālā stilistika”. Šī darba mērķis ir, balstoties uz teorētiskajā un empīriskajā daļā iegūto informāciju, izveidot funkcionālu un pievilcīgu dizainu 2023.gada plānotājam, kas veltīts Vispārējo latviešu Dziesmu svētku 150.gadadienai. Darba teorētiskajā daļā aprakstīta Dziesmu svētku un to grafisko materiālu vēsture un attīstība, kā arī aprakstīti plānotāju aizsākumi pasaulē un kā tie attīstījušies Latvijā, cik liela nozīme bija gada grāmatām pagājušā gadsimta cilvēka ikdienā. Lai varētu izveidot pēc iespējas funkcionālāku dizainu, tika izpētīta formāta, kompozīcijas, režģa un grafisko elementu izmantošana plānotājos. Empīriskajā daļā tika izvirzīti kri…
VII latvju vispārējie Dziesmu svētki 1931.gada 19., 20., 21., 22. jūnijā: Plakāts
1931
Plakāts glabājas LU Akadēmiskās bibliotēkas Misiņa bibliotēkas Sīkdarbu fonda plakātu kolekcijā
Pupils Creative Activity in Textile Art at Competition
2014
The open olympiads of home economics and technologies encourage pupils of grades 5-9 to be creative in applying textile techniques. They also popularize textile art. Purpose of the study is to analyse the results of pupils’ creative work during the 10th open olympiad of home economics and technologies. Method: analysis of textile works. 376 pupils’ works from the 1st round and 85 works of the 2nd round have been analysed and assessed according to the following criteria: compliance with the task, unity of composition, composition of colours, compatibility of materials, originality, quality of the technical accomplishment, functionality. In the olympiad traditional Latvian handicraft techniqu…
Unveiling microbial structures during raw microalgae digestion and co-digestion with primary sludge to produce biogas using semi-continuous AnMBR sys…
2020
[EN] Methane production from microalgae can be enhanced through anaerobic co-digestion with carbon-rich substrates and thus mitigate the inhibition risk associated with its low C:N ratio. Acclimated microbial communities for microalgae disruption can be used as a source of natural enzymes in bioenergy production. However, co-substrates with a certain microbial diversity such as primary sludge might shift the microbial structure. Substrates were generated in a Water Resource Recovery Facility (WRRF) and combined as follows: Scenedesmus or Chlorella digestion and microalgae co-digestion with primary sludge. The study was performed using two lab-scale Anaerobic Membrane Bioreactors (AnMBR). Du…
BIOALGA reactor: preliminary studies for heavy metals removal
2002
Abstract Microalgae have a high affinity for polyvalent metals, for that reason they could be used to reduce the concentration of heavy metals present in water and wastewater. In the present work an evaluation of a rotary biofilm reactor for algae immobilization (BIOALGA) with the subject of heavy metal removal was investigated. The BIOALGA reactor consisted of a pilot scale model that was operated with synthetic wastewater with an initial concentration of 3000 μg/l of cobalt ion. Scenedesmus obliquus was immobilized in the reactor, which was operated in batch mode for a period of 20 days. The rotary velocity used, 2 rpm, was constant during the experiment. A maximum removal of cobalt ion o…
Effect of intracellular P content on phosphate removal in Scenedesmus sp. Experimental study and kinetic expression
2014
The present work determines the effect of phosphorus content on phosphate uptake rate in a mixed culture of Chlorophyceae in which the genus Scenedesmus dominates. Phosphate uptake rate was determined in eighteen laboratory batch experiments, with samples taken from a progressively more P-starved culture in which a minimum P content of 0.11% (w/w) was achieved. The results obtained showed that the higher the internal biomass P content, the lower the phosphate removal rate. The highest specific phosphate removal rate was 6.5 mgPO4 P gTSS -1 h -1 . Microalgae with a P content around 1% (w/w) attained 10% of this highest removal rate, whereas those with a P content of 0.6% (w/w) presented 50% …