Search results for "OTU"

Why does vacuum drive to the loading of halloysite nanotubes? The key role of water confinement.

2019

The filling of halloysite nanotubes with active compounds solubilized in aqueous solvent was investigated theoretically and experimentally. Based on Knudsen thermogravimetric data, we demonstrated the water confinement within the cavity of halloysite. This process is crucial to properly describe the driving mechanism of halloysite loading. In addition, Knudsen thermogravimetric experiments were conducted on kaolinite nanoplates as well as on halloysite nanotubes modified with an anionic surfactant (sodium dodecanoate) in order to explore the influence of both the nanoparticle morphology and the hydrophobic/hydrophilic character of the lumen on the confinement phenomenon. The analysis of the…

Centrifugation does not alter spatial distribution of `BEP4' mRNA in paracentrotus lividus EGG

1997

AbstractParacentrotus lividus unfertilized eggs were centrifuged in a sucrose gradient, so to split each into two parts: a nucleated light fragment and an anucleated heavy fragment. Northern blot analyses utilizing a bep4 probe as animal marker and H2A histone gene and 12S-mit RNA as controls indicate that the eggs are elongated along the animal-vegetal axis during centrifugation and thereafter split into an animal and a vegetal half. Treatment of the eggs with colchicine before centrifugation abolishes the animal localization of bep4 mRNA.

Skrituļslidu komplektēšanas sistēma

2017

Kvalifikācijas darba mērķis ir izstrādāt neatkarīgu sistēmu, ar kuras palīdzību tās lietotājam tiek nodrošināts veids, kā dot informāciju par preču sortimentu skrituļslidu veikalā un iespēju pašam lietotājam nokomplektēt skrituļslidas, balstoties uz detaļu specifikāciju, savienojamību un lietotāja vēlmēm. Sistēma ir paredzēta skrituļslidu veikala apmeklētājiem un darbiniekiem, padarot ērtāku iepirkšanos un atvieglojot veikala darbinieku darbu.

Teknologian käyttöönotto työyhteisön oppimisprosessina : tapaustutkimus yhteistoiminnan mahdollistavan teknologian käytön rakenteistumisesta suomalai…

2002

Microsoft Word formāta pārskatu veidošana Lotus Notes lietotnei

2015

Lotus Notes lietotnē, kas paredzēta organizācijā reģistrēto projektu koordinēšanai, dati tiek eksportēti uz Microsoft Word dokumentiem. Eksportēti tiek arī dati no bagātinātā teksta laukiem, kuros var saglabāt formatētu tekstu, kā arī tabulas. Šobrīd lietotnē ir iespējams veidot Microsoft Word formāta pārskatus, taču šī funkcionalitāte strādā tikai datoriem, kuriem ir Windows operētājsistēma. Macintosh un Linux operētājsistēmu lietotājiem šī funkcionalitāte nestrādā. Darba mērķis ir izstrādāt analogu funkcionalitāti esošajai, kas darbosies arī citās operētājsistēmās, ne tikai Windows vidē. Lai to izdarītu, jāizpēta iespējamās alternatīvas un jāizvēlas piemērotākā no tām. Darba rezultātā ir …

Työyhteisö viestintäteknologian käyttäjänä : miten ymmärtää yhteistoiminnan mahdollistavan teknologian käyttöönottoa ja käyttöä suomalaisen monitoimi…

2001

Typification of the sacred lotus Nelumbo nucifera (Nelumbonaceae)

2014

Lumbriculus variegatus (Annelida) biological responses and sediment sequential extractions indicate ecotoxicity of lake sediments contaminated by bio…

2018

Abstract We assessed potential ecotoxicity of lake sediments affected by biomining effluents in northeastern Finland. Growth, reproduction and behavior of the sediment-dwelling oligochaete Lumbriculus variegatus (Muller 1774) were used as ecotoxicity endpoints. Standardized chronic bioassays were used for growth and reproduction, and acute and chronic tests with Multispecies Freshwater Biomonitor (MFB) for behavior assessments. Sequential extractions were used to characterize metal bioavailability and exposure conditions in the sediments, which indicated mining-induced contamination gradients of S, Cu, Ni and U and also bioavailability gradients of S and Ni. Among the ecotoxicity endpoints,…

Bioanalytical system for detection of cancer cells with photoluminescent ZnO nanorods

2016

Using photoluminescent ZnO nanorods and carbohydrate marker SSEA-4, a novel cancer cell recognition system was developed. Immobilization of SSEA-4 antibodies (αSSEA-4) on ZnO nanorods was performed in buffer solution (pH = 7.1) over 2 h. The cancer cell line probes were fixed on the glass slide. One hundred microliters of ZnO-αSSEA-4 conjugates were deposited on the cell probe and exposed for 30 min. After washing photoluminescence spectra were recorded. Based on the developed methodology, ZnO-αSSEA-4 probes were tested on patient-derived breast and colorectal carcinoma cells. Our data clearly show that the carbohydrate SSEA-4 molecule is expressed on cancer cell lines and patient-derived c…

Using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry for the characterization of functionalized carbon nanotubes

2013

RATIONALE: Functionalization of carbon nanotubes (CNTs) generates complex systems that require the development of suitable characterization protocols. New techniques have been explored, and existing analytical and spectroscopic methods to characterize functionalized CNTs have been adapted. Presently, chemical characterization of functionalized CNTs (f-CNTs) remains a difficult task. METHODS: Matrix-assisted laser desorption/ionization (MALDI) analysis is performed on f-MWCNT samples prepared via grafting or absorption of anti-oxidant (AO) molecules on both MWCNT-COOH and MWCNT-OH. Covalently functionalized MWCNTs were subjected to thermal degradation and/or hydrolysis reaction before analys…