ID: 4757
Year: 2026
Products: 0.19 mm tubing
Authors: Martinez-Gallegos, SM;Morales-Villagrán, A;Medina-Ceja, L;Pardo-Peña, K;Casillas-Romero, S;
Application: ~
TNF-α is a key proinflammatory cytokine implicated in the initiation and progression of neuroinflammatory responses. However, conventional detection techniques pose sample volume limitations that hinder the temporal resolution that can be achieved using animal models.In this study, we developed a novel system designed to quantify cytokines via continuous sampling of cerebrospinal fluid (CSF) via low-flow pushpull perfusion coupled with immunodetection via nanodot blotting. The system was tested in a 4-aminopyridine (4-AP) model of acute epileptiform activity, and the time course of TNF-α was characterized with a 1-min temporal resolution.We observed rapid release of TNF-α within minutes of 4-AP administration. The peak of this release coincided temporally with the onset of epileptiform discharge trains, highlighting the relevance of TNF-α in the early phase of seizurelike activity. TNF-α levels returned to baseline within the first hour, a dynamic that would likely be missed by co...
ID: 4756
Year: 2026
Products: 193 nm Geolas ArF laser ablation system
Authors: Kiseeva, E;Davies, R;Korolev, N;Ma, S;Jollands, M;Liu, L;Zhang, H;Kupenko, I;Chumakov, A;
Application: Laser;geochemistry;
The Wyoming Craton is one of the best-preserved Archaean fragments of Laurentia. For billions of years it's consisted of a thick Archaean root surrounded by Proterozoic suture zones. In this study we characterise the geochemistry of 20 eclogitic xenoliths and, for five samples determine the ferric-ferrous ratios and oxygen fugacities, from the Aultman, Maxwell, and Schaffer kimberlite pipes from the Colorado-Wyoming State Line kimberlite district with EPMA, LA-ICP-MS, and Synchrotron Mössbauer spectroscopy. We measured major and trace element concentrations in garnet and clinopyroxene, which were used to reconstruct bulk-rock compositions and determine the pressure-temperature conditions along the craton's 38 mW/m2 geotherm. We subdivide xenoliths into gabbroic eclogites (with an ancient oceanic gabbro protolith), pyroxenitic (of various origins), high-Mg eclogites (derived from oceanic basalts), and one high-Ca eclogite (likely with an oceanic crust protolith). Major element composit...
ID: 4755
Year: 2026
Products: APEX2-Q
Authors: Poehle, S;Velasquez, I;Koschinsky, A;
Application: Dissolved;seawater;
Molybdenum (Mo) and uranium (U) are usually considered as conservative metals in the oceanic water column though deviations have been observed in e.g. surface waters. The key objective was to study the impact of dust input and pronounced oxygen minimum zones (OMZs) on dissolved Mo and U in comparison with the truly conservative element rubidium (Rb) in seawater samples from two GEOTRACES research cruises: GA11 - NE-Atlantic affected by Saharan dust and the Mauritanian upwelling and GA08 - SE-Atlantic affected by Namibian dust and the Benguela upwelling. We observed slightly higher Mo and U concentrations, 114.8 nmol/kg and 14.5 nmol/kg, respectively, under the Saharan dust plume trajectory (NE-Atlantic) compared to their average seawater concentrations (107 nmol/kg and 13.9 nmol/kg) leading to the assumption of Saharan dust being a source. Slightly lower than average Mo and U concentrations, 102.8 nmol/kg and 11.9 nmol/kg, respectively, above the suboxic Namibian shelf (SE-Atlantic) ca...
ID: 4749
Year: 2026
Products: NWR193HE excimer laser system
Authors: He, W;Qi, Y;Wang, M;Dai, M;Du, Y;
Application: Laser;
A substantial number of Thalassinoides horizontalis burrows have developed within Cambrian Stage 4 carbonates of the Mantou Formation on the southern North China Block. Based on detailed field investigations, the morphology and spatial distribution of the T. horizontalis burrows, along with the selective dolomitization occurring within them, were examined using polarising microscopy, cathodoluminescence, scanning electron microscopy (SEM), and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). The findings indicate that T. horizontalis formed in an intertidal lime-mud flat setting, characterised by episodic subaerial exposure and recurrent desiccation. The burrow fill consists predominantly of microbially-induced primary dolomite. A variety of authigenic minerals such as chamosite, euhedral pyrite, and siderite are also present within the burrows, which is indicative of dysoxic to anoxic conditions as supported by geochemical evidence. T. horizontalis may represen...
ID: 4748
Year: 2026
Products: ESI New Wave NWR 193UC (TwoVol2) laser ablation system
Authors: Xiang, D;Mao, Q;Zhang, Z;Liu, S;Chew, D;Wu, L;Wang, N;Guo, C;Yang, H;Xiao, W;
Application: Laser;geochemistry;
The Jurassic tectonic and geomorphic evolution of the Chinese West Tianshan (CWTS) remains controversial, with conflicting models proposing either regional peneplanation or a local topographic relief. We present the first integrated detrital apatite U-Pb geochronology and trace element geochemistry dataset from Jurassic strata in the Yili and Bayanbulak Basins, complemented by previously published detrital zircon U-Pb data, to constrain the Jurassic tectono-geomorphic evolution of the CWTS. Our results demonstrate that early Early Jurassic sediments in the northern Yili Basin were primarily sourced from the North Tianshan-northern Yili Block and central Yili Block, reflecting topographic barriers that restricted southern sediment input. By the late Early Jurassic, these barriers were eroded, enabling south-derived detritus (460-400 Ma) from the southern Yili-Central Tianshan to reach the northern Yili Basin, signaling diminished topographic relief. In contrast, the Bayanbulak Basin r...
ID: 4742
Year: 2026
Products: Elemental Scientific Lasers
Authors: Zhang, M;Yang, Y;Huang, C;Wu, S;Chu, Z;Zhao, Z;Xu, L;Yang, J;Wu, F;
Application: Laser;
Rb-Sr beryl geochronology provides an independent chronometer capable of delivering robust age constraints, with significant implications for geochemical investigations and gemstone provenance studies....
ID: 4741
Year: 2026
Products: Elemental Scientific Lasers
Authors: Billimoria, K;Menero‐Valdés, P;Lee, W;Shard, A;Goenaga-Infante, H;
Application: Laser;
The lack of suitable calibration standards is a persistent bottleneck for quantitative bioimaging by LA-ICP-MS. Widespread use of in-house calibration approaches has led to a lack of harmonisation limiting the......
ID: 4740
Year: 2026
Products: APEX Ω desolvating system
Authors: Jouini, A;Payant, L;Vigier, N;
Application: Biological;Environmental;
Lithium (Li) isotopes ratios (expressed as δ 7 Li) are increasingly utilized as tracers for environmental and biological processes, including recent studies on Li uptake by living organisms and its emerging role......
ID: 4735
Year: 2026
Products: TwoVol3 ablation chamber
Authors: Chrást, P;Zvěřina, O;Komendová, R;Barták, M;
Application: Biological;Laser;
This study employed laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) to investigate the spatial distribution of essential and potentially toxic elements in Usnea antarctica from James Ross Island, Antarctica. A triple quadrupole ICP-MS system coupled with a new laser ablation system enabled 15 μm spatial resolution, facilitating the acquisition of detailed bioimages. Bioimages captured Cu, Co, Ni, Mn, Fe, Zn, Cr, Pb, and U allocation across lichen pseudotissues, revealing allocation patterns between the cortical, photobiont, and medullary regions. These elemental distribution trends support previous Antarctic biomonitoring studies, differentiation between long-range transport, structural embedding and essential roles of inorganic nutrients. High-speed triple-quadrupole acquisition and refined laser probe spatial resolution provided an improved framework for elemental bioimaging in complex biological matrices. The results indicate preferential accumulation of Fe...
ID: 4734
Year: 2026
Products: PFA nebulizer
Authors: Vaňková, M;Vaněk, A;Shalabai, A;Mihaljevič, M;Ettler, V;Racek, M;Drahota, P;Fleissig, P;Vokurková, P;Zádorová, T;Penížek, V;Hrdlička, T;Mathur, R;
Application: Speciation;soil;isotope;
This study presents silver (Ag) stable isotope ratios (expressed as δ109Ag) combined with mineralogy and speciation data in Ag-contaminated anthropogenic soils from a historic mining area at Kutná Hora, Czech Republic. Results showed large variability of soil Ag, both in concentrations (~0.5-100 mg/kg) and isotopic patterns (δ109Ag from −0.5 to +1.2 ‰, ±0.1 ‰ 2σ), resulting from differences in the source substrates, i.e. the composition of the original mining waste or slag. In other words, the data do not reflect the fractionation of Ag isotopes during pedogenesis and weathering processes, but rather the inherited 109Ag/107Ag signature of the hydrothermal ore and its genesis history. Examining our endmembers and their potential quantities, a tendency for soils to become isotopically lighter (depleted in the heavy 109Ag isotope) as the concentration of Ag increases was identified, and vice versa. This finding suggests that Ag-rich sulfides, primarily galena, generally favor t...
ID: 4733
Year: 2026
Products: prepFAST MC
Authors: Vink, M;Leichliter, J;Green, D;Brömme, S;Tacail, T;Kindler, L;Roebroeks, W;Gaudzinski-Windheuser, S;Haug, G;Vonhof, H;Martínez-García, A;Tütken, T;Lüdecke, T;
Application: Environmental;Dissolved;
Reconstructing the climate of central Europe during the Eemian serves a dual purpose. First, the Eemian represents the most recent pre-Holocene period of widespread climate warming, and its vegetation structure offers a potential natural baseline for temperate European vegetation, as it was unaffected by large-scale anthropogenic alterations. Second, because Neanderthals lived in Europe during this period, understanding the climate provides insights into their environmental adaptations. Here we examined seasonal climate variation at a sub-annual scale during the early Eemian (ca. 121 ± 5 ka) by analyzing oxygen isotopes (δ18OCO3) in tooth enamel of 14 serially sampled equid third molars from the Neanderthal occupation site of Neumark-Nord 2 (NN2), Germany. These specimens were retrieved from find level NN2/2B, which spans less than 500 years. Stable carbon (δ13CCO3) and mineral-bound nitrogen isotopes (δ15Nmb) were measured in the same enamel aliquots to assess seasonal influences ...
ID: 4732
Year: 2026
Products: apex Omega desolvating introduction system
Authors: Mallick, D;Wang, X;Miletto, M;Krause, J;Ohnemus, D;Planavsky, N;Luther, G;Lyons, T;Tebo, B;
Application: Dissolved;Total;seawater;isotope;
The chromium (Cr) stable isotope compositions of sedimentary rocks have been used to track the evolution of oxygen levels in Earth's ocean-atmosphere system. However, the Cr isotope fractionation during transfer of dissolved Cr to sediments is still unclear. The Chesapeake Bay is a seasonally redox-stratified estuary (oxic surface water overlying euxinic, or sulfide-bearing, deep water) and thus provides a good opportunity to investigate Cr isotope fractionation in euxinic systems. Here we report total dissolved Cr concentrations and stable isotope compositions (δ53Cr) of a water column in this estuary. As salinity increases from 7.51 in the oxic surface water to 19.22 in the euxinic deep water, total dissolved Cr concentration decreases from 1.21 nmol kg−1 to 0.51 nmol kg−1, while δ53Cr decreases from 0.60 ‰ to −0.41 ‰. Explaining these data requires partial reduction of Cr(VI) to Cr(III) followed by incomplete scavenging of Cr(III) from solution, which leads to isotope fr...
ID: 4727
Year: 2026
Products: APEX2
Authors: Kreitsmann, T;Klose, L;Kraemer, D;Mahecha, A;Regenspurg, S;Wilke, F;Bau, M;
Application: seawater;
Alkaline lakes in the East African Rift System represent unique environments that have attracted considerable scientific attention over the years. Their significance has grown further due to their astrobiological relevance and potential economic interest. Surprisingly, only limited data are available on trace elements, and more specifically, rare earth elements and yttrium (REY) in these systems. In this study, we present a new, comprehensive dataset of REY and other trace elements from alkaline lakes and associated hot springs in northern Tanzania. Our results reveal elevated concentrations of REY, W, Sc, and U, which are attributable to the presence of strong ligands (carbonate and phosphate), complexation with humic acids, and accumulation through evaporation. Shale-normalised REY patterns in the alkaline lakes are characterised by HREY enrichment over LREY, positive Ce anomalies, and fractionated Y/Ho ratios. These patterns are controlled by the distinctive physicochemical conditio...
ID: 4726
Year: 2026
Products: spray chamber
Authors: Wang, J;Lyu, S;Qiu, Z;Han, X;Li, M;Li, C;Chen, X;
Application: seawater;isotope;
As an essential product of hydrothermal activity, hydrothermally influenced sediments record source characteristics and geochemical signals of hydrothermal circulation. Here, we report on the chemical and isotopic compositions of a hydrothermally influenced sediment core (HiSC) and a biogenic carbonate sediment core (BcSC) collected near hydrothermal vents on the Carlsberg Ridge, northwest Indian Ocean. Episodic changes between metalliferous hydrothermal precipitates and calcareous sedimentation provide a unique opportunity to investigate the connection between calcium (Ca)-copper (Cu) isotope systems and hydrothermal activity. The δ44/40Ca values (relative to NIST SRM915a) in HiSC ranged from 0.59 ± 0.10 ‰ (2SD) to 0.96 ± 0.09 ‰ and were controlled by the mixing between biogenic carbonates and detrital components (weathering product of host rock and/or sinking lithogenic particles). Endmember δ44/40Ca of biogenic carbonates was 0.57 ± 0.07 ‰ (95 % confidence interval), cons...
ID: 4723
Year: 2026
Products: ESI NWR193 ArF excimer laser system with 193 nm wavelength equipped with a TwoVol2 ablation cell
Authors: Mercier, L;Migeon, S;Rubino, J;Rojas-Agramonte, Y;Hagen, A;Bousquet, R;Mertz-Kraus, R;
Application: Laser;
Submarine canyons are key elements of the evolution of convergent margins. Their infilling can be mud-prone and thus represents a good seal if they cut through reservoir series, this erosion phase may be enhanced by tectonic activity. The present study focuses on the Western Alpine Foreland Basin where we use the outcrops of the Schistes à Blocs Formation to study the syn-tectonic evolution of a Lower Oligocene submarine canyon that cuts through the Annot Sandstones Formation. The Intra Schistes à Blocs Erosion Surface (ISaBES) has been mapped in the field. Airborne and drone pictures were also used. Moreover, the deposition model and the stratigraphic architecture of the canyon-fill were reconstructed from the analysis of seven sedimentary logs cumulating 410 m of series, particularly crossing the under described Schistes Bruns Member. The sedimentary system of this lower unit of the canyon-fill has been also constrained by the measurement of paleocurrents, and the provenance analys...
ID: 4717
Year: 2026
Products: Elemental Scientific Laser (ESL) ImageGEO laser
Authors: Gómez, N;Lowe, D;Mills, A;Kommescher, S;Lam, R;
Application: isotope;Laser;geochemistry;
Identification of glacial influence in ancient active volcanic arc basins is challenging due to the overprinting effects of tectonism on the climatic fingerprint. The Neoproterozoic West Avalonian terrane records protracted arc volcanism within thick volcanic-sedimentary successions containing glacial diamictites of the Gaskiers glaciation (ca. 580 Ma). Such glaciogenic strata are recognized from deep- and shallow-marine settings in two basins in the Avalon zone of Newfoundland, i.e., St. John's and Bonavista Basins, offering an opportunity to disentangle changes in sediment provenance through terrane-scale glacial cycles. This study provides ~1800 single-grain detrital zircon U-Pb dates combined with zircon trace-element and Lu-Hf isotopic data from the glaciogenic Mercantile and Trinity Diamictites and underlying units (e.g., Monk Bay, Jones Pond, and Plate Cove East Members) in the Bonavista Basin. The maximum depositional ages of the studied units approach their depositional ages, ...
ID: 4712
Year: 2026
Products: Micoflow
Authors: Stajnko, A;Levi, M;Engfeldt, M;Linder, R;Leeman, M;Åkerberg Krook, E;Assarsson, E;Enquist, H;Dahlqvist, C;Ek, Å;Lovén, K;Bodin, T;Snigireva, A;Grahn, K;Kippler, M;Rydenstrand, G;Amir Taher, E;Runström Eden, G;Björ, B;Bertilsson, H;Wiebert, P;Dahlman Höglund, A;Modig, L;Albin, M;Broberg, K;Dock, E;
Application: Urine;Blood;
The green transition relies on metals, requiring increased metal recovery from waste. However, exposure risks among metal recycling workers are poorly understood. We conducted a cross-sectional study to assess dust and metal exposure among 139 recycling workers from 13 Swedish metal recycling companies and 90 controls. We documented work practices through observations and questionnaires and assessed dust and metal exposures using a combination of individual air sampling (inhalable (ID) and respirable dust) and biomonitoring (blood and pre-/post-shift urine). ICP-MS was used to measure 39 metals in air, 47 in blood, and 42 in urine. Thirty-two % of the workers were involved in the recycling of e-waste. At most workplaces, dust control was insufficient, respiratory protective equipment was rarely or incorrectly used, and hygienic routines were inadequate. This was reflected in 6.2 times higher ID levels in recycling workers; 14 % exceeded the 5 mg/m3 exposure limit for ID, and some als...
ID: 4696
Year: 2026
Products: 3 mL-bed volume column
Authors: Tchaikovsky, A;Tobias, B;Berner, M;Pany-Kucera, D;Ingrová, P;Hofmanová, Z;Scharl, T;Pohl, W;Hann, S;
Application: Environmental;Food;isotope;
The isotopic composition of strontium n(87Sr)/n(86Sr) provides important information relevant to earth, life, food, archaeological and anthropological sciences. To determine accurate n(87Sr)/n(86Sr) isotope ratios, it is necessary to perform instrumental isotopic fractionation (mass bias) correction, which is a popular metaphor for isotope ratio calibration. Despite the importance of calibration in n(87Sr)/n(86Sr) analysis, experimental studies which critically evaluate the accuracy of conceptually different calibration methods remain scarce. Therefore, this work 1) investigates if n(87Sr)/n(86Sr) isotope ratios differ depending on the calibration method used and 2) discusses whether these differences might impact the outcome of a study on past human mobility.This work compares n(87Sr)/n(86Sr) results of the same physical sample, which were determined using internal calibration (internal mass bias correction) and external calibration (standard-sample-bracketing) in a large sample set. ...
ID: 4694
Year: 2026
Products: microFAST SC autosampler
Authors: Stanberry, JS;Szakas, SE;Andrews, HB;Hendriks, L;Ticknor, BW;Bergin, RA;Tazik, SK;Kegler, P;Neumeier, S;Zirakparvar, NA;Dunlap, DR;Manard, BT;
Application: high throughput;
Inductively coupled plasma - time-of-flight - mass spectrometry (ICP-TOF-MS) was employed for the isotopic analysis of uranium particles of varying 235U enrichment levels. Here, a single particle (SP)-based introduction scheme was employed such that individual particles, in a suspension, were analyzed. The uranium oxide microparticles were comprised of depleted uranium (DU, 235U/238U of 0.0017316(14)), natural uranium (NU, 235U/238U of 0.0072614(39)), and low enriched uranium (LEU, 235U/238U of 0.051025(15)). The percent relative difference of the SP-ICP-TOF-MS measured isotopic ratios compared to the expected values for the DU, NU, and LEU particle populations were 8.75, 0.12, and 1.23 %, respectively. After characterization, the DU and NU particles were doped within a complex sample matrix (Arizona Test Dust) containing Fe, Ti, Al, and Si particles, among others. Then, the suspension was analyzed via SP-ICP-TOF-MS and the detected particles were classified as DU or NU based on their...
ID: 4678
Year: 2026
Products: low flow perfluoroalkoxy (PFA) nebulizer
Authors: Zhou, M;Gibson, LD;Stamberga, D;Islam, MF;Popovs, I;Einkauf, JD;Thiele, NA;Sacci, RL;Doughty, B;Bocharova, V;Bryantsev, VS;
Application: ~
Efficient separation of rare earth element (REE) ores via froth flotation requires the development of novel ligands with enhanced adsorption capacity and selectivity. To realize these advances, understanding the mechanisms underlying interactions between the ligand and mineral surfaces is essential. This study systematically evaluates the adsorption behavior of alkyl- and aromatic alkyl-substituted hydroxamic acid ligands on monazite surfaces using complementary spectroscopic techniques, including UV-visible (UV-vis) spectroscopy, Raman spectroscopy, infrared spectroscopy, and vibrational sum frequency generation (SFG) spectroscopy, together with the ab initio molecular dynamics (AIMD) simulations. Among the studied ligands, octanohydroxamic acid (OHA) and 4-ethoxy-N,2-dihydroxybenzamide (EDHBA) exhibit high adsorption capacity under basic pH (8-10) by forming multilayers on the surface. OHA has a higher equilibrium adsorption capacity compared to EDHBA, but it forms a less stable mult...
ID: 4672
Year: 2026
Products: M2 pump
Authors: Rosenthal, M;Moumaneix, L;Rautama, E;Lahtinen, J;Jiang, H;Cherevko, S;Priamushko, T;Kallio, T;
Application: Cells;
The development of electrocatalysts based on earth-abundant elements has gained significant attention due to the scarcity and high cost of Ir- and Ru-based materials typically used in proton exchange membrane electrolyzers (PEMELs). This study focuses on Fe-Mn-based catalysts for promoting the oxygen evolution reaction (OER), the sluggish four-electron process at the anode of PEMELs, where acidic conditions and high anodic potentials (1.6-2.0 V ) often accelerate corrosion. The catalysts were synthesized via a hydrothermal method and optimized using a response surface design of experiments (DOE), followed by detailed physicochemical characterization. The optimized composition ( Image 1001 ) demonstrates good electrochemical activity and stability, maintaining performance over 10,000 potential cycles between 1.2 and 2.0 V , with a moderate shift in the overpotential required to reach 10 (from 1.78 V vs RHE to 1.84 V vs RHE). Inductively coupled plasma mass spectrometry of flow cells sca...
ID: 4812
Year: 2025
Products: Product Unavailable
Authors: Rajalahti, P;
Application: ~
Käsittelen tässä tutkielmassa suomalaisuuden ja kansallisen identiteetin diskursseja Pasila-televisiosarjassa. Pasila on suomalainen animaatiosatiiri, joka esitettiin ensimmäistä kertaa vuosina 2007-2013 YLE TV2-kanavalla. Tutkielmani pääkysymys on: Millaisia merkityksiä suomalaisuudelle ja kansalliselle identiteetille Pasilassa annetaan? Tämän lisäksi esitän aineistolle kaksi tarkentavaa lisäkysymystä: Millä keinoin sarjassa identifikaatioita tuotetaan? Sekä, minkälaisiin diskursiivisiin konteksteihin suomalaisuuden representaatiot sarjassa voidaan liittää? Tutkielman kannalta yksi keskeisimpiä käsitteitä on Michael Billigin kirjassaan Banal nationalism (1995) hyödyntämä arkipäiväinen nationalismi, jolla hän tarkoittaa arkipäiväistyneitä tapoja, joiden avulla vakiintuneet kansallisvaltiot liputtavat kansakuntaa, ja siten muistuttavat kansalaisia heidän kansallisesta identiteetistään. Tutkielman tarkoituksena onkin tuoda esille niitä arkipäiväisiä ...
ID: 4811
Year: 2025
Products: Product Unavailable
Authors: Saga, Y;
Application: ~
Tämän toiminnallisen opinnäytetyön toimeksiantajana toimii Suomen kauppakamari Kiinassa. Shanghaissa sijaitseva FinnCham China ottaa puolen vuoden välein harjoittelijoita Haaga-Heliasta, jotta opiskelijat saisivat arvokasta työkokemusta kansainvälisestä työpaikasta. Harjoittelijat helpottavat toimeksiantajan hektistä työtahtia, mutta jokaisen harjoittelijan kohdalla vaaditaan kattava perehdytys, jotta apu olisi optimaalisen laadukasta. Uusien työntekijöiden perehdyttäminen vie paljon aikaa ja resursseja. FinnCham Chinassa ei ole aikaisemmin ollut käytössä perehdytykseen luotua visuaalista ja kirjallista materiaalia. Projektin tarkoituksena on luoda perehdytysopas kahdesta käytetyimmistä sovelluksista Suomen Kauppakamarin yksiköille Kiinassa, jotka sijaitsevat Shanghaissa ja Pekingssä. Perehdytysoppaan avulla uudet työntekijät pääsevät tehokkaasti kiinni avainasemassa oleviin työtehtäviin ja saavat nopeammin varmuutta. Perehdytysopas on ensisijaisesti laaditt...
ID: 4810
Year: 2025
Products: Product Unavailable
Authors: Raivio, L;
Application: ~
The aim of the thesis was to find out what kind of educational values can be found in the Pikku Kakkonen in the 1980s and 2020s and how these values are handled. In addition, the purpose was to get information on how the handling of educational values has changed in Pikku Kakkonen during these decades. The aim of the study was to shed light on the cultural-historical significance and position of Pikku Kakkonen as a Finnish children's programme. The study was carried out as a qualitative study and was based on social constructionism. The material consisted of eight 1980s and 2020s programs of the Pikku Kakkonen and one interview. The main material consisting of the programmes was analysed with data-driven content analysis. According to the results of the study, the educational values in Pikku Kakkonen and its programmes were very similar in both decades, but there were differences in how they were handled. In the 1980s Pikku Kakkonen emphasized the concrete handling of social skills, fr...
ID: 4809
Year: 2025
Products: TV2.1-venttiilin vuoksi
Authors: Jani, K;
Application: ~
Opinnäytetyön tavoitteena oli suunnitella, ohjelmoida ja toteuttaa kiinteistöautomaatiojärjestelmän valvonnan alakeskus. Työn toimeksiantajana toimi Elektrika Solutions Oy, joka vastasi järjestelmän suunnittelusta, ohjelmoinnista ja toteutuksesta. Asiakkaana ja valvojana hankkeessa toimi LV-Putkiasia Oy. Työssä suunniteltiin ja toteutettiin kiinteistöautomaation kokonaisvaltainen ohjauskeskus huomioiden pienjännite- ja koneturvallisuusvaatimukset. Suunnittelun tavoitteena oli laatia kaikki tarvittavat dokumentit keskusvalmistusta, kytkentää ja käyttöönottoa varten. Opinnäytetyö sisälsi kytkentäkaavioiden ja keskuslayout-kuvien laatimisen, logiikan ohjelmoinnin, keskusvalmistuksen sekä käyttöönoton. Etävalvonnan toteutus rajattiin työn ulkopuolelle. Opinnäytetyön tuloksena syntyi toimiva kiinteistöautomaatiojärjestelmä kaikkine dokumentteineen. Uuden valvonnan alakeskuksen tavoitteena oli parantaa kiinteistön energiatehokkuutta ja varmistaa automaatiojä...
ID: 4808
Year: 2025
Products: Product Unavailable
Authors: Emily, O;
Application: Environmental;Dissolved;
Dissertation (Ph.D.) University of Alaska Fairbanks, 2025...
ID: 4807
Year: 2025
Products: oneFAST platform
Authors: Cordero, C;Caratti, A;Liberto, E;Trapani, F;Fina, A;
Application: ~
Abstract Unavailable...
ID: 4806
Year: 2025
Products: prepFast M5X automatic dilution automatic sample loader
Authors: Chung, D;
Application: ~
We have explored crystal growth, dissolution, and cation exchange reactions in Mg (hydr)oxides and carbonates in the presence of H2O and CO2 to constrain mechanisms, reactions rates, and efficiencies for cement production, direct air capture (DAC), and dolomitization of limestone. Our time-resolved X-ray diffraction (TRXRD) observations of periclase hydration in an acetic acid buffer solution are best explained by solid-state diffusion of H+ along the (111) planes of periclase. Counter to prior interpretations, no amorphous intermediate between periclase and brucite was observed in this study. The evolution of lattice parameters and microstrains indicates the development of stacking faults along the c direction of brucite generated by different packing arrangements of the oxygen atoms in periclase and brucite. As these stacking faults disappeared, the microstrain along c (S004) decreased by 98.5 % and the lattice parameter c increased by 8 %. Both Fe- and Mn-doped brucites absorbed mor...
ID: 4805
Year: 2025
Products: TV4, TV5 ovat suljettuina ja venttiili TV3
Authors: Olavi, K;
Application: ~
Tämän opinnäytetyön tavoitteena oli selvittää saven soveltuvuutta lämpöenergian kausivarastointiin tutkimalla sen lämmönvarastointikykyä laboratorio-olosuhteissa. Työ toteutettiin osana ULLEVI-hanketta, jonka tarkoituksena on kehittää ja edistää lämpöenergian varastointiin liittyvää osaamista, tutkimusta ja liiketoimintaa. Varsinais-Suomen maaperä on laajalti savea, jolloin energiapaalujen hyödyntäminen savimaahan rakennettaessa voisi tarjota uuden mahdollisuuden kausivarastointiin ilman erillisiä varastorakenteita. Työn alkuperäinen toimeksianto keskittyi saven lämpöteknisten ominaisuuksien selvittämiseen, mutta osoittautui myöhemmin, että pelkkä laboratoriomittauksiin perustuva tarkastelu ei ole riittävä arvioitaessa saven käyttökelpoisuutta todellisissa lämpövarastosovelluksissa. Saven ominaisuuksia tutkittiin lopulta määrittämällä sen vesipitoisuus, raekoko, tiheys, ominaislämpökapasiteetti sekä viitteellinen lämmönjohtavuus. Opinnäy...
ID: 4804
Year: 2025
Products: spray chamber
Authors: Bair, EC;
Application: Cells;Environmental;nanoparticle;
The ubiquitous presence of nanoparticles (NPs) and nanoplastics (NPPs) and their effects on environmental and human health is a significant concern. They are used in every aspect of our daily lives, and while they offer many benefits, there are concerns about their impacts on ecosystems and human health. The primary aim of this dissertation is to quantify NP and NPP transformations in the presence of algae and determine how those transformations influence bioavailability. The methodology involves two complementary analytical applications: single particle (SP) and single cell (SC) inductively coupled plasma mass spectrometry (ICP-MS). These techniques are tested and applied to two freshwater microalgal cell types after exposing them to inorganic NPs, including gold (Au), silver-shelled gold (Au@Ag), and palladium NPPs. Post-exposure, cells were separated from the cell suspension to remove dispersed NPs and NPPs that were not cell-associated. Cell-associated NPs and NPPs were then measur...
