Search results for "SSA"

Return of the Apex Predator : How Brown Trout (Salmo trutta) Re-Establishment Shapes an Ecosystem

2021

Re-establishment of a declined apex predator fish species in a lake ecosystem may have dramatic effects on other fish and plankton community already inhabiting the ecosystem. We studied mechanistically potential impacts of re-establishment of the brown trout (Salmo trutta) in the west-central European Lake Constance focusing on two commercially important fish species: whitefish and Eurasian perch. We compared simulation model outputs from two versions of an allometric trophic network model for Lake Constance, one with and one without the trout as the apex predator. The re-establishment of the declined brown trout reduced the perch population directly by predation and indirectly by increased…

Occurrence of pharmaceuticals in municipal wastewater treatment plants and receiving surface waters in Central and Southern Finland

2016

The presence of five selected pharmaceuticals, four anti-inflammatory drugs, diclofenac, ibuprofen, ketoprofen, naproxen, and an antiepileptic drug carbamazepine, was determined at four municipal wastewater treatment plants (WWTPs) and in the receiving waterway near the city of Jyväskylä, in central Finland and also in the River Vantaa. First, an analytical method was developed including a pretreatment and purification followed by liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) in the multiple reaction monitoring mode. The studied pharmaceuticals were detected from influents and effluents of four municipal WWTPs and from surface water of eight locations along the water …

Image analysis with environmental applications

2012

Kaukokartoitusmenetelmiä käytetään tarkkuusmaataloudessa ja metsien inventoinnissa. Pro gradu -tutkielma keskittyy parantamaan analysointiprosessia kasvillisuusmäärien arvioimiseksi esikäsitellyistä ilmakuvista ja digitaalisesta korkeusmallista. Tutkielmassa esitellään evolutiivinen optimointimenetelmä viljapellon biomassojen estimoimiseksi ja tutkitaan biomassaestimaattien tekoa eri menetelmin radiometrisesti korjatuista spektrikaistoista. Tutkielmassa pohditaan myös vaihtoehtoja puulajeittaisten tilavuuksien estimoimiseksi metsistä. Remote sensing methodologies are employed in the fields of precision agriculture and forest industry. This thesis focuses on enhancing analysation process for…

Three zone modeling of downdraft biomass gasification : equilibrium and finite kinetic approach

2013

Mathematical models and simulations are being practiced exceedingly in the field of research and development work. Simulations provide a less expensive means of evaluating the benefits and associated risk with applied field. Gasification is a complex mechanism, which incorporates thermochemical conversion of carbon based feedstock. Therefore, simulation of gasification provides a better comprehension of physical and chemical mechanism inside the gasifier than general conjecture and assist in optimizing the yield. The main objectives of present thesis work involve formulation of separate sub-model for pyrolysis and oxidation zone from published scientific references, and assembling it with p…

Sustainable Working Life Patterns in a Swedish Twin Cohort : Age-Related Sequences of Sickness Absence, Disability Pension, Unemployment, and Prematu…

2022

We aimed to investigate sustainable working life via age-related sequences of sickness absence (SA), disability pension (DP), unemployment (UE), premature death, and the influence of individual characteristics, accounting for familial confounding. The sample included monozygotic (MZ) and dizygotic (DZ) same-sexed twin pairs with register data (n = 47,450) that were followed for 10 years in four age cohorts: 26–35 (n = 9892), 36–45 (n = 10,620), 46–55 (n = 12,964) and 56–65 (n = 13,974). A sequence analysis was done in a 7-element state space: 1. “Sustainable working life”: SA/DP 0–30 days and UE 0–90 days; 2. “Unemployment >90 days”: SA/DP 0–30 days and UE > 90 days; 3. “Moderate SA/DP”: SA…

Johdanto

2022

Production of ethyl lactate by activated carbon-supported Sn and Zn oxide catalysts utilizing lignocellulosic side streams

2021

In this study, activated carbon-supported Sn and Zn oxide catalysts were prepared from hydrolysis lignin and used for the conversion of model solutions of trioses, hexoses, and lignocellulosic biomass hydrolysates to ethyl lactate. Both catalysts, SnO2@AC and ZnO@AC, were able to produce ethyl lactate in high yields. SnO2@AC was a more active and selective catalyst in triose (dihydroxyacetone) conversion, providing 99% yield to ethyl lactate. ZnO@AC, by contrast, was more selective in glucose and hydrolysate conversion, with a yield of 60% and 85%, respectively. The ethyl lactate yields were significantly higher than those from the optimized model solution experiments when using ZnO@AC cata…

Biblijne podstawy nauczania o Duchu Świętym w "Katechezach" Cyryla Jerozolimskiego

2020

Tekst przedłożonego artykułu przedstawia nauczanie Cyryla Jerozolimskiego († 387) na temat Ducha Świętego w ramach jego interpretacji tzw. symbolu wiary stosowanego w Jerozolimie. Będąc autorem 18 katechez wygłoszonych do katechumenów i 5 skierowanych do neofitów, dwie z nich poświęcił przekazaniu nauki o Duchu Świętym. Są nimi Katecheza XVI i Katecheza XVII umieszczone w cyklu nauk katechetycznych przeznaczonych dla katechumenów. Analiza tekstowa tych katechez doprowadziła do wyselekcjonowania kilku aspektów tego nauczania, mającego charakter biblijnego udokumentowania przekazywanych wątków. Na uwagę zasługują kwestie związane z nazwami Ducha Świętego, z istotą trynitarnych relacji oraz Je…

Aikuisten terveysliikunnan edistäminen liikuntaseuroissa : Kunnossa kaiken ikää (KKI) -ohjelman seuratoiminnan kehittämishanke 2008-2010

2011

Tutkimuksessa selvitettiin Kunnossa kaiken ikää (KKI) -ohjelman seuratoiminnan kehittämishankkeessa (v. 2008–2010) mukana olevien seurojen näkemyksiä aikuisten terveysliikunnan ja yhteistyön edistämisestä. Tutkimus keskittyi tarkastelemaan minkälaisia hyviä käytäntöjä, haasteita ja/tai esteitä seuroilla oli aikuisten terveysliikunnan ja yhteistyön edistämiseksi sekä minkälaisia ennakkoluuloja yhteistyössä eri tahojen kanssa oli ilmennyt. Lisäksi selvitettiin, mitä seurat kokivat hankkeen aikana ilmenneiksi hyödyiksi ja pettymyksiksi aikuisten terveysliikunnan ja yhteistyön edistämisessä. Tutkimusaineistona oli KKI -ohjelman hankearviointiin suunnatut seurantalomakkeet (n=13) ja toimintakert…

N-Cinnamoyltetraketide Derivatives from the Leaves of Toussaintia orientalis

2015

Seven N-cinnamoyltetraketides (1−7), including the new Ztoussaintine E (2), toussaintine F (6), and toussaintine G (7), were isolated from the methanol extract of the leaves of Toussaintia orientalis using column chromatography and HPLC. The configurations of E-toussaintine E (1) and toussaintines A (3) and D (5) are revised based on single-crystal X-ray diffraction data from racemic crystals. Both the crude methanol extract and the isolated constituents exhibit antimycobacterial activities (MIC 83.3−107.7 μM) against the H37Rv strain of Mycobacterium tuberculosis. Compounds 1, 3, 4, and 5 are cytotoxic (ED50 15.3−105.7 μM) against the MDA-MB-231 triple negative aggressive breast cancer cel…