Articles from TUHAT CRIS


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This collection contains Open Access articles deposited from the University of Helsinki TUHAT CRIS

Recent Submissions

  • Bao, Yulong; Ertbjerg, Per (2015)
    In order to study the effect of oxygen concentration on shear force and oxidation of lipids and proteins, pork loins were stored in modified atmosphere (MA) with either 0, 20, 40, 60, or 80% O2 and 20% CO2 and N2 as filler gas at 5 ºC for 14 days. Allo-Kramer shear force and TBARS increased with increasing oxygen concentration. Free thiol groups was greater in meat packaged under oxygen (20 – 80%). Myosin heavy chain (MHC) cross-linking, a more specific marker of protein oxidation, was greater in MAP with 80% oxygen. Desmin degradation and µ-calpain activity was not affected by the presence of oxygen, suggesting that the oxygen-induced toughening of meat is through protein oxidation leading to cross-linking of structural proteins rather than through inactivation of proteolytic enzymes leading to reduced proteolysis.
  • Katerere, Yemi; Kalame, Fobissie Blese (United Nations, Economic Commission for Africa, 2015)
    Policy Brief / ClimDev-Africa
  • Denton, Fatima; Nkem, Johnson; Okereke, Chukwumerije; Kalame, Fobissie Blese; Roger, Charles; Somorin, Olufunso; Nuesiri, Emmanuel (Africa Climate Policy center - UNECA, 2015)
  • Rasimus-Sahari, Stiina; Mikkola, Raimo Olavi; Andersson, Aino Maria Alice; Jestoi, Marika; Salkinoja-Salonen, Mirja Sinikka (Elsevier B. V., 2015)
    Reasons for mammalian cell toxicity observed in barley and spring wheat grains were sought. Streptomyces sp. isolates from wheat and barley produced heat-stable methanol-soluble substances which inhibited the motility of exposed porcine spermatozoa used as a toxicity indicator. Several barley isolates produced antimycin A (2 to 5 ng/mg wet wt of biomass), a macrolide antibiotic known to block oxygen utilization in mitochondria. The antimycinproducing isolates were members of the Streptomyces albidoflavus group. In in vitro assays with porcine kidney tubular epithelial cells, the specific toxicity of antimycin A towards mitochondria was higher than that of the mycotoxin enniatin B but lower than that of the mitochondriotoxins cereulide and paenilide, produced by food-related Bacillus cereus and Paenibacillus tundrae, respectively. The toxic wheat isolates, related to Streptomyces sedi, did not produce antimycin A and or any other known toxin. Our results suggest that the presence of toxin-producing streptomycetes in stored cereal grains may pose a thus far unrecognized threat for food and feed safety.
  • Okonogi, Kenichi; Wilcock, Graham; Yamamoto, Seichi (2015)
  • Wilskman, Juho (Finnish Society for Byzantine Studies, 2015)
    This article aims to cast more light on the relatively under-researched subject of warfare in late Byzantine and Frankish Greece by analysing the descriptions of military operations between the Byzantine Empire and the Crusader Principality of Achaia in Morea (the Peloponnese) in 1264, especially the battle of Makry-Plagi. Moreover, it will demonstrate that, although relations between the Latins, Byzantines, and even the Turks were generally hostile at this time, these groups could co-operate to a surprising extent, and even showed a readiness for peaceful co-existence.
  • Ahonen, Heli; Fabritius, Hannele (2015)
  • Puttonen, Pasi Kalevi (Academia scientiarum Fennica, 2015)
    Vuosikirja / Suomalainen tiedeakatemia
  • Timonen, Hilkka; Aurela, Minna; Carbone, Samara; Saarnio, Karri; Frey, Anna; Saarikoski, Sanna; Teinilä, Kimmo; Kulmala, Markku; Hillamo, Risto (Finnish Environment Institute, 2014)
    Concentration and composition of the fine particulate matter (PM) was measured using various online methods for 13 months in an urban, background area in Helsinki, Finland. Seasonal differences were found for ions and carbonaceous compounds. Biomass burning was found to increase inorganic ion and elemental carbon (EC) concentrations in winter, whereas organic carbon (OC) contribution was highest during summer due to secondary aerosol formation. Diurnal cycles, with maxima between 06:00 and 09:00, were recorded for EC and nitrate due to traffic emissions. In addition, the concentrations measured with the online and offline PM sampling devices were compared using regression analysis. In general, a good agreement (r(2) = 0.60-0.95) was found. During the year-long measurements, on average 65% of PM2.5 was identified by submicron chemical analyses (ions, OC, EC). As compared with filter measurements, the high resolution measurements provided important data on short pollution plumes and diurnal changes.
  • Gashev, Sergey; Kurhinen, Juri (Tyumen State University, 2015)
    The paper shows that, in the past centuries, the anthropogenic transformation of the landscape against the climatic changes in Western Siberia favoured migration of one species of vertebrata and reduced areas of others, but with an obvious positive balance. Over the past 400 years, only 12 species of vertebrata (8 species of mammals and 4 species of birds) became extinct in Tyumen region, whereas 57 new species emerged (13 species of mammals and 27 species of birds). It is stated that the high rates of dynamics of fauna in Tyumen region fall within the last 50 years, and the highest of them account for the last 15 years, which primarily corresponds to the current trend of strengthening of continentality of the regional climate (due to the change of zonal circulation of air masses to meridional circulation) against the global warming in the north of the Northern Hemisphere of Earth because of the change of the axis of its rotation to the plane of the ecliptic.
  • Fabritius, Hannele (Association of Greek Librarians and Information Professionals, 2015)
    Methods of learning in the workplace will be introduced. The methods are connect to competence development and to the process of conducting development discussions in a dialogical way. The tools developed and applied are a fourfold table, a cycle of work identity, a plan of personal development targets, a learning meeting and a learning map. The methods introduced will aim to better learning at work.
  • Snäll, Tord; Lehtomäki, Joona Aleksi; Arponen, Anni Katri Ilona; Elith, Jane; Moilanen, Atte Jaakko (SPRINGER NEW YORK LLC, 2016)
    There is high-level political support for the use of green infrastructure (GI) across Europe, to maintain viable populations and to provide ecosystem services (ES). Even though GI is inherently a spatial concept, the modern tools for spatial planning have not been recognized, such as in the recent European Environment Agency (EEA) report. We outline a toolbox of methods useful for GI design that explicitly accounts for biodiversity and ES. Data on species occurrence, habitats, and environmental variables are increasingly available via open-access internet platforms. Such data can be synthesized by statistical species distri- bution modeling, producing maps of biodiversity features. These, together with maps of ES, can form the basis for GI design. We argue that spatial conservation prioritization (SCP) methods are effective tools for GI design, as the overall SCP goal is cost-effective allocation of conservation efforts. Corridors are currently promoted by the EEA as the means for implementing GI design, but they typically target the needs of only a subset of the regional species pool. SCP methods would help to ensure that GI provides a balanced solution for the requirements of many biodiversity features (e.g., species, habitat types) and ES simultaneously in a cost- effective manner. Such tools are necessary to make GI into an operational concept for combating biodiversity loss and promoting ES.
  • Kantele, Anu; Siikamäki, Heli; Virolainen-Julkunen, Anni; Keistinen, Timo (Suomalainen lääkäririseura Duodecim, 2016)
  • Tidigs, Julia Katarina; Markus, Huss (2015)
    VAKKI Publications
    Der vorliegende Beitrag untersucht den Lyrikband notes for soloists (2009) der transnationalen Lyrikerin Cia Rinne mit einem besonderen Schwerpunkt auf der Frage der literarischen Mehrsprachigkeit und der Intermedialität des Textes. Ausgangspunkt ist Naoki Sakais Verständnis von Übersetzung als „bordering“ (Sakai 2009); hier wird die Rolle des Lesers von notes for soloists als Erzeuger sprachlicher Grenzen hervorgehoben. Hierbei funktioniert Rinnes mehrsprachiger und intermedialer Text als eine Art Partitur, die Leser verschiedener Sprachkompetenzen auf unterschiedliche Weise realisieren. Es wird veranschaulicht, wie die Dynamik zwischen dem gedruckten Text und den verschiedenen artikulatorischen Möglichkeiten des Textes die Leser in eine Sphäre zwischen Sonorität und sprachlicher Artikulation versetzt; eine Sphäre, die normalerweise kleinen Kindern, die noch keine Sprache beherrschen, vorbehalten ist. Dabei wird die Kontingenz sprachlicher Grenzen ins Auge gefasst, zugleich werden jedoch auch mögliche Verbindungen zwischen verschiedenen für die Leser unbekannten bzw. bekannten Sprachen vorgeführt.