Дисертації з теми "Chemical LTP"
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Montalbano, Alberto. "Synaptic plasticity regulation mediated by BDNF: functional and morphological study." Doctoral thesis, Università degli studi di Trieste, 2012. http://hdl.handle.net/10077/7404.
Повний текст джерелаThe long-term potentiation (LTP) represents a widely studied form of synaptic plasticity related to learning and memory processes, which involves a long-lasting strengthening of synaptic connections through changes of their transmission and cytoarchitecture. The induction of LTP is classically achieved by tetanic stimulation of presynaptic components but it is also possible to in- duce chemically a long-term potentiation of the synaptic efficacy, thus enhancing a larger number of synapses compared to electrical stimulation and facilitating the biochemical and morphological study. The first part of this thesis is a methodological study of glycine and tetraethylammonium (TEA) induced chemical LTP (cLTP) in cultured hippocampal cells. Brief glycine (in Mg2+-free) application activate NMDA receptors, whereas TEA blocks of K+ channels inducing a depolariza- tion responsible for Ca2+ influx. Both drugs were briefly superfused and mEPSCs were monitored for all the duration of the experiments (≃60 min). This was considered as a necessary step to detect later the role of the Brain Derived Neurophic Factor (BDNF) in cLTP. Healthy hippocampal cells were dissected from rats of postnatal day 1-2. After a period of 10-12 days in vitro the cells reached optimal density, a typical mature pyramidal neuron morphology, and an extended dendritic arborization which facilitates synaptic contacts. At this stage patch-clamp technique in the whole-cell configuration was used to study the electrophysiological properties of pyramidal hippocampal neurons, able to produce spontaneous electrical activity. cLTP was tested recording miniature excitatory postsynaptic currents (mEPSCs) in voltage-clamp mode focusing on changes in their amplitude and frequency. A significant decrease in mEPSCs inter-event intervals was observed after glycine and TEA application, without significant changes in aptitudes. Therefore 20 min after glycine application an increase (≃ 61.6 %) in mEPSCs frequency was observed. A similar result was obtained also after TEA application (≃ 66 %). Following cLTP we observed also morphological changes such as an increase in density and a remodeling of different classes of dendritic spines. The role of BDNF in this cLTP model was assessed testing by ELISA assay the total BDNF expres- sion on cell lysate and by blocking Tropomyosin Receptor Kinase (Trk) with K252A. A significant increase in BDNF levels (≃ 120 %) was observed 50 min after cLTP induction. A switch from cLTP into cLTD was observed blocking Trk receptors. Moreover, confocal images collected before and after chemical potentiation in the presence of K252A showed a significant reduction (≃10%) in the average spine density both at the proximal and distal level. A significant reduction of the p-TrkB/TrkB ratio, after both gly- and TEA-LTP, was observed in distal dendrites compared to the soma. This therefore suggests a translocation of the activated receptor from periphery to the soma.
XXIV Ciclo
1983
Carey, Thomas. "Chemical control of thermal expansion in zeolites with the LTA topology." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4258/.
Повний текст джерелаGalant, Malikaah. "The characterisation of the lead flotation circuit at Black Mountain Mining (Pty) Ltd. using the floatability component model approach." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/24313.
Повний текст джерелаChiu, Yen-ni, and chiuyenni@yahoo com au. "Ethoxylation reactor modelling and design." Swinburne University of Technology. Centre for Micro-Photonics, 2005. http://adt.lib.swin.edu.au./public/adt-VSWT20050610.140607.
Повний текст джерелаChiu, Yen-ni. "Ethoxylation reactor modelling and design." Australasian Digital Thesis Program, 2005. http://adt.lib.swin.edu.au/public/adt-VSWT20050610.140607.
Повний текст джерелаA thesis submitted in fulfillment of the requirements for the degree of Doctor of Philosophy, Centre for Micro-Photonics, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, 2005. Typescript. Bibliography: p. 201-210. Also available on cd-rom.
Stonkutė, Edita. "Chemical composition of kinematically identified galactic stellar group." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130925_093107-33619.
Повний текст джерелаPaukščių Tako galaktikoje yra identifikuota žvaigždžių srautų, judančių bei kinematinių grupių, kurių kilmė siejama su įkritusiomis galaktikomis. Aktualu ištirti, ar yra tokių senųjų substruktūrų pėdsakų mūsų Saulės aplinkoje? Helmi ir kt. (2006), panaudoję Nordström ir kt. (2004) Ženevos–Kopenhagos apžvalgos (ŽKA) katalogą, identifikavo tris naujas koherentines žvaigždžių grupes, kurios pasižymi išskirtiniais kinematiniais parametrais ir gali būti užgalaktinės kilmės. Šiuo disertacijos darbu siekiama prisidėti prie Galaktikos substruktūrų tyrimų, nustatant detalią cheminę vienos iš Helmi ir kt. identifikuotų žvaigždžių grupių sudėtį. Svarbu išsiaiškinant, ar ŽKA kinematinės grupės žvaigždžių atmosferų cheminė sudėtis skiriasi nuo Galaktikos disko žvaigždžių. Nustatėme 21 3–osios ŽKA kinematinės grupės bei 6 palyginamųjų plonojo disko žvaigždžių atmosferų pagrindinius parametrus bei 22 cheminių elementų gausas. Kinematinės žvaigždžių grupės deguonies ir α–elementų gausos yra padidėjusios lyginant su plonuoju disku ir yra panašios į storojo disko. Cheminių elementų, daugiausia pagaminamų s–procese, gausos ir geležies grupės elementų gausos yra panašios į to paties metalingumo plonojo disko nykštukių cheminių elementų gausas, o cheminių elementų, daugiausia pagaminamų r–procese, gausos yra padidėjusios lyginant su plonuoju disku. Panaši cheminė tirtos kinematinės grupės bei storojo Galaktikos disko sudėtis rodo, kad kinematinės žvaigždžių grupės ir storojo disko žvaigždžių... [toliau žr. visą tekstą]
Benvenga, Sérgio Roberto. "Neoleucinodes elegantalis (Guenée) (Lep.: Crambidae) em tomateiro estaqueado : dinâmica populacional, nível de controle com feromônio sexual e eficiência de agrotóxicos /." Jaboticabal : [s.n.], 2009. http://hdl.handle.net/11449/102319.
Повний текст джерелаBanca: José Eudes de Morais Oliveira
Banca: José Ednilson Miranda
Banca: Robson Thomaz Thuler
Banca: Marcelo da Costa Ferreira
Resumo: A relação entre a infestação da broca-pequena-do-fruto, Neoleucinodes elegantalis, e a produtividade foi avaliada na cultura do tomate, Lycopersicon esculentum, em ciclo de verão e inverno, com o objetivo de analisar a influência da infestação na produtividade da cultura e aperfeiçoar a tomada de decisão de controle. Armadilhas com feromônio sexual foram instaladas em parcelas experimentais e na mesma data foi avaliada a densidade de adultos capturados e a infestação de plantas com ovos nos frutos. A pressão populacional foi mais expressiva nos cultivos de verão. O aumento no número de adultos capturados nas armadilhas correspondeu a um incremento na infestação de ovos nos frutos e houve influência positiva da infestação de plantas com a produção descartada. Definiu-se que a tomada de decisão de controle deve ocorrer quando for capturada a média de 0,24 e de 0,23 adultos na armadilha por dia, nos cultivos de verão e de inverno, respectivamente. Numa etapa complementar avaliou-se a eficiência de inseticidas sobre os ovos (ação ovicida), lagartas recém-eclodidas (ação de choque) e em fase de crescimento (ação fisiológica), sob condições de laboratório. Para tanto, frutos com ovos foram imersos na calda inseticida para avaliação da ação ovicida e ação de choque aos 7 dias após a imersão e aos 21 dias, para a ação fisiológica. Foram avaliados 24 inseticidas e uma testemunha em aplicação isolada e com a adição de óleo vegetal (0,25%), respectivamente. Trebon 100 SC (etofenprox; 200 mL de produto comercial/100 L), Lannate BR (methomil; 100 mL), Thiobel 500 (cartap; 250 g) e Vertimec 18 CE (abamectin; 100 mL) apresentaram ação efetiva sobre os ovos e lagartas de N. elegantalis. A adição do adjuvante interfiriu de forma significativa e positiva na eficiência dos inseticidas.
Abstract: The relationship between the infestation of Neoleucinodes elegantalis and productivity was evaluated in tomato crops, Lycopersicon esculentum, in summer and winter cycles, with the objective of analyzing the infestation influence on the productivity and improving the decision making control. Sex pheromone traps were installed in experimental plots and at the same date was assessed the density of adults caught and infestation of plants with eggs in fruits. The population pressure was more significant in the summer crops. The increase in the number of adults caught in traps corresponded to an increase in infestation of eggs in the fruit and with positive influence of the infestation on plants with the production. Decision-making control should occur when the average catch of 0.24 and 0.23 adults in the trap per day in the summer and winter crops, respectively. An additional step was conducted to evaluate the efficiency of insecticides on the eggs (ovicidal action), newly-hatched larvae (shock action) and in the growth phase (physiological action) under laboratory conditions. Fruit with eggs were emmerged in the insecticide solutions for assessing ovicidal action and the shock action at 7 days after immersion and at 21 days, to physiological action. It was evaluated 24 insecticides and a control application in with and without addition of vegetable oil (0.25%). Trebon 100 SC (etofenprox; 200 mL of commercial product/100 L), Lannate BR (methomil; 100 mL), Thiobel 500 (cartap; 250 g) and Vertimec 18 EC (abamectin; 100 mL) had action on the eggs and larvae of N. elegantalis. The addition of adjuvant showed significantly and positively effects in the insecticides efficiency.
Doutor
Mikolaitis, Šarūnas. "Evolutionary Effects of Chemical Composition in Red Giants of Open Clusters." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120913_085458-84188.
Повний текст джерелаPadrikieji spiečiai naudojami astrofizikoje, tiriant Galaktikos disko cheminę raidą bei žvaigždžių evoliuciją. Spiečiaus žvaigždžių amžius, atstumas nuo Saulės, pirminė cheminė sudėtis yra apytiksliai vienodi, tad juos galima laikyti kosminėmis laboratorijomis. Pagrindinis disertacijos tikslas skirtas tirti maišymosi procesus evoliucionavusiose žvaigždėse. Siekiama įvertinti kaip maišymosi procesai paveikia 12^C/13^C ir 12^C/14^N gausų santykius ir palyginti su teoriniais maišymosi modeliais. Kitas tikslas skirtas prisidėti prie Galaktikos disko cheminės sudėties bei evoliucijos tyrimo. 12^C/13^C ir 12^C/14^N gausų santykiai nustatyti penkių spiečių evoliucionavusių žvaigždžių atmosferose. Helį centre deginančiose žvaigždėse kurių žvaigždžių posūkio iš pagrindinės sekos masės (M_toff) yra mažesnės nei 2 saulės masės, 12^C/13^C santykiai gerai sutampa su termohalinio (TH) bei šaltojo žemutinių sluoksnių (CBP) papildomo maišymosi modeliais, o tokių spiečių kurių M_toff yra didesnės nei 2,5 saulės masių papildomas maišymasis yra didesnis nei numato teoriniai modeliai. Dviejuose padrikuosiuose spiečiuose anglies izotopų gausų santykiai helį centre deginančių žvaigždžių atmosferose yra mažesni nei žvaigždėse, perkopusiose šviesio mazgą raudonųjų milžinių sekoje. Tai galėtų būti dėl galimo papildomo medžiagos maišymosi helio žybsnio metu. Beveik visų tirtų elementų radialinis pasiskirstymas Galaktikoje yra iš esmės plokščias, bet [O/Fe] ir [Mg/Fe] gausos turi tendenciją augti... [toliau žr. visą tekstą]
Garbarienė, Inga. "Origin, chemical composition and formation of submicron aerosol particles in the atmosphere." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140520_134625-72680.
Повний текст джерелаDisertacija skirta smulkiosios aerozolio dalelių frakcijos šaltinių, fizikinių ir cheminių savybių įvertinimui kompleksiškai apjungiant įvairius tyrimo metodus. Darbe susieti elementinės ir organinės anglies koncentracijų pokyčiai su tolimąja oro masių pernaša, įvertinta regiono bei vietinių šaltinių įtaka bendrai aerozolio dalelių taršai. Aprašyti anglies turinčių aerozolio dalelių pasiskirstymai pagal dydį foninėse vietovėse ir miesto aplinkoje. Naudojant aerozolio masių spektrometrą Preilos atmosferos užterštumo tyrimų stotyje buvo identifikuotas biogeninis organinių medžiagų šaltinis, kuris vidutiniškai sudaro 15 % nuo organinių medžiagų masės, tačiau Šiaurės Atlanto oro masėje biogeninių medžiagų indėlis siekia net 50 %. Atlikus kompleksinę aerozolio ir stabiliųjų anglies izotopų masių spektrometrinę analizę buvo nustatyta, kad pirminis anglies turinčio aerozolio dalelių šaltinis mieste yra autotransportas, o Rūgšteliškio foninėje vietovėje – biomasės deginimas. Taip pat buvo nustatyta, kad Vilniuje dominavo antropogeninės antrinės organinės medžiagos (76 %), o Rūgšteliškyje vyravo biogeninės antrinės organinės medžiagos (apie 50%). Vertinant tolimosios oro masių pernašos įtaką vietinės kilmės aerozolio dalelių formavimuisi ir kaitai, buvo nustatyta, kad vulkaninės kilmės aerozolio dalelės turi įtakos submikroninės aerozolio dalelių frakcijos koncentracijai, cheminei sudėčiai ir pasiskirstymui pagal dydį.
Larsson, Carl-Emil. "Emission Problems and Opportunities from Calcium Carbide Production : A STUDY OF INNER MONGOLIA HAIJI CHLOR ALKALI-CHEMICALCO. LTD. IN WUHAI, CHINA." Thesis, KTH, Industriell ekologi, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-32715.
Повний текст джерелаwww.ima.kth.se
Benvenga, Sérgio Roberto [UNESP]. "Neoleucinodes elegantalis (Guenée) (Lep.: Crambidae) em tomateiro estaqueado: dinâmica populacional, nível de controle com feromônio sexual e eficiência de agrotóxicos." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/102319.
Повний текст джерелаGravena Manecol Ltda
A relação entre a infestação da broca-pequena-do-fruto, Neoleucinodes elegantalis, e a produtividade foi avaliada na cultura do tomate, Lycopersicon esculentum, em ciclo de verão e inverno, com o objetivo de analisar a influência da infestação na produtividade da cultura e aperfeiçoar a tomada de decisão de controle. Armadilhas com feromônio sexual foram instaladas em parcelas experimentais e na mesma data foi avaliada a densidade de adultos capturados e a infestação de plantas com ovos nos frutos. A pressão populacional foi mais expressiva nos cultivos de verão. O aumento no número de adultos capturados nas armadilhas correspondeu a um incremento na infestação de ovos nos frutos e houve influência positiva da infestação de plantas com a produção descartada. Definiu-se que a tomada de decisão de controle deve ocorrer quando for capturada a média de 0,24 e de 0,23 adultos na armadilha por dia, nos cultivos de verão e de inverno, respectivamente. Numa etapa complementar avaliou-se a eficiência de inseticidas sobre os ovos (ação ovicida), lagartas recém-eclodidas (ação de choque) e em fase de crescimento (ação fisiológica), sob condições de laboratório. Para tanto, frutos com ovos foram imersos na calda inseticida para avaliação da ação ovicida e ação de choque aos 7 dias após a imersão e aos 21 dias, para a ação fisiológica. Foram avaliados 24 inseticidas e uma testemunha em aplicação isolada e com a adição de óleo vegetal (0,25%), respectivamente. Trebon 100 SC (etofenprox; 200 mL de produto comercial/100 L), Lannate BR (methomil; 100 mL), Thiobel 500 (cartap; 250 g) e Vertimec 18 CE (abamectin; 100 mL) apresentaram ação efetiva sobre os ovos e lagartas de N. elegantalis. A adição do adjuvante interfiriu de forma significativa e positiva na eficiência dos inseticidas.
The relationship between the infestation of Neoleucinodes elegantalis and productivity was evaluated in tomato crops, Lycopersicon esculentum, in summer and winter cycles, with the objective of analyzing the infestation influence on the productivity and improving the decision making control. Sex pheromone traps were installed in experimental plots and at the same date was assessed the density of adults caught and infestation of plants with eggs in fruits. The population pressure was more significant in the summer crops. The increase in the number of adults caught in traps corresponded to an increase in infestation of eggs in the fruit and with positive influence of the infestation on plants with the production. Decision-making control should occur when the average catch of 0.24 and 0.23 adults in the trap per day in the summer and winter crops, respectively. An additional step was conducted to evaluate the efficiency of insecticides on the eggs (ovicidal action), newly-hatched larvae (shock action) and in the growth phase (physiological action) under laboratory conditions. Fruit with eggs were emmerged in the insecticide solutions for assessing ovicidal action and the shock action at 7 days after immersion and at 21 days, to physiological action. It was evaluated 24 insecticides and a control application in with and without addition of vegetable oil (0.25%). Trebon 100 SC (etofenprox; 200 mL of commercial product/100 L), Lannate BR (methomil; 100 mL), Thiobel 500 (cartap; 250 g) and Vertimec 18 EC (abamectin; 100 mL) had action on the eggs and larvae of N. elegantalis. The addition of adjuvant showed significantly and positively effects in the insecticides efficiency.
Stirkė, Arūnas. "Investigation of the chemical and electrical effects on Saccharomyces cerevisiae yeast cell properties." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2013~D_20131015_155805-91468.
Повний текст джерелаMielių (Saccharomyces cerevisiae) taikymas biologiniuose jutikliuose ar biokatalizėje ribojamas jų ląstelės sienelės struktūros, kuri apsunkina reikiamų medžiagų transportą. Todėl darbo tikslas – ištirti mielių ląstelių mechaninių savybių ir plazminės membranos bei sienelės pralaidumo pakitimus, veikiant mielių ląsteles cheminėmis medžiagomis bei mikro- ir nanosekundžių trukmės didelės galios impulsais naudojant atominių jėgų mikroskopą bei tetrafenilfosfonio katijonų elektrocheminę analizę. Nustatyta, kad ditiotreitolis (DTT) keisdamas mielių sienelių pralaidumą, pakeičia mielių ląstelių mechanines savybes. Esant didelėms deformacijoms mielių ląstelių tamprumo modulis (Young‘o) padidėjo nuo 1,00 ± 0,04 MPa nepaveiktoms iki 2,14 ± 0,1 MPa DTT paveiktoms mielėms. Tiriant impulsinio elektrinio lauko (IEL) poveikį mielių sienelės pralaidumui, impulso trukmių nuo mikrosekundžių iki nanosekundžių diapazone stebima tiesinė TPP+ absorbcijos greičio priklausomybė nuo impulso energijos. Nustatyta, kad veikiat mieles 60 ns trukmės impulsais ląstelių pralaidumas TPP+ molekulėms, nepažeidžiant mielų gyvybingumo, padidėjo iki 65 kartų lyginant su nepaveiktomis elektriniu lauku mielių ląstelėmis, t.y. 3,5 karto daugiau negu mieles paveikus 150 μs impulsais. Tyrimų rezultatai rodo, kad IEL galima didinti visos ląstelės biologinių jutiklių spartą ir atrankumą.
Nguyen, Thi Huu. "Réactions de métallation régioflexibles des acides alkoxybenzoïques non protégés. Possibilités, limitations et mécanisme." Phd thesis, Université du Maine, 2006. http://tel.archives-ouvertes.fr/tel-00108157.
Повний текст джерелаAvec les bases alkyllithiées, il y a formation intermédiaire d'un complexe de prélithiation (effet CIPE). Le complexe le plus stable est généralement celui formé entre le carboxylate et la base lithiée. Les bases amidures métallent la position la plus acide thermodynamiquement (les effets inductifs et mésomères prédominent) et la régiosélectivité est généralement différente. La superbase de Lochmann-Schlosser plus "vorace" et moins sélective est davantage sensible à l'encombrement stérique et réagit préférentiellement en ortho de la fonction alkoxy. Les différentes techniques chimiques mises au point nous ont permis de proposer une synthèse éclair de l'acide lunularique.
Un mécanisme pour les réactions de lithiation dirigée est proposé.
Les acides 2-fluoro- et 2-méthoxybenzoïques donnent des réactions de substitution nucléophile aromatique (ipso-substitution) avec les organolithiens. L'introduction d'un atome de silicium en position 6 du cycle permet de diminuer la réactivité du carboxylate vis-à-vis de la base nucléophile. Le premier exemple de réaction d'échange brome-lithium en présence d'eau lourde est présenté. Une interprétation à ce phénomène est donnée.
Enfin, les réactions de métallation de la phénothiazine sont réanalysées sur le plan mécanistique. Contrairement à ce qui est indiqué dans la littérature, il est vraisemblable que ces transformations ne font pas intervenir un dianion. Le mécanisme suivi dépend de l'électrophile et ce dernier est susceptible d'intervenir dans le processus de métallation.
Kraujutienė, Ingrida. "An Influence of Cultivar and Growing Technology upon Chemical Composition and Biological Activity of Sprouted Wheat." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2007. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2007~D_20071217_130406-51539.
Повний текст джерелаPirmą kartą buvo nustatytas ir palygintas pagal skirtingas technologijas išaugintų, o po to daigintų kviečių veislių 'Širvinta 1' ir 'Zentos' grūdų α- ir β-amilazių, maltazės, ksilanazės, celiulazės, katalazės, proteazių fermentų aktyvumas, C ir E vitaminų, pakeičiamųjų ir nepakeičiamųjų aminorūgščių kiekiai ir energinė vertė. Pirmą kartą įvertinus ekologiškai augintų, daigintų kviečių biocheminę sudėtį, mikromicetinę ir bakterinę taršą, jie panaudoti naujiems rauginto pieno produktams kurti.
Haglund, Robin. "Automated analysis of battery articles." Thesis, Uppsala universitet, Strukturkemi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-403738.
Повний текст джерелаPozdniakovaitė, Natalija. "Žmogaus baltymo p14.5 geno struktūra bei funkcija normaliose ir onkoproliferuojančiose ląstelėse." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2006. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2006~D_20060622_093527-75486.
Повний текст джерелаVitkauskienė, Irena. "Chemical recycling of industrial poly(ethylene terephthalate) waste: synthesis of aromatic polyester polyols, their properties and use." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110920_152312-50729.
Повний текст джерелаŠiame darbe nuodugniai ištirtos gamybinių polietilentereftalato (PET) atliekų susidarymo vietos, priežastys bei jų savybės. Pasiūlyti skirtingi cheminio perdirbimo būdai ir sąlygos kiekvienai gamybinių PET atliekų rūšiai. Vykdant gamybinių PET atliekų glikolizę etilenglikoliu, pasiekta didesnė negu 85 % bis(2-hidroksietilen)tereftalatо išeiga. Peresterinant gamybines PET atliekas dietilenglikoliu (DEG) ir naudojant funkcinius priedus glicerolį (GL) ir/arba adipo rūgštį (ADR), susintetinta serija aromatinių poliesterpoliolių (APP), besiskiriančių savo klampa ir kitomis savybėmis. Pirmą kartą nuodugniai ištirta ir matematiškai aprašyta peresterinimo reakcijos mišinyje esančių funkcinių priedų įtaka APP klampai. APP, susintetinti peresterinant gamybines PET atliekas DEG ir turintys ADR ir/arba GL fragmentų, yra mažai linkę kristalintis ir stabilūs saugant juos kambario temperatūroje. APP klampa mažai priklauso nuo metaloorganinio katalizatoriaus cheminės sudėties ir jo koncentracijos. Naudojant PET peresterinimo metu gautus APP ir diizocianato perteklių, susintetintos poliuretano-poliizocianurato (PU-PIR) putos. Putos, gautos iš APP, kuriuose yra GL ir/arba ADR fragmentų, pasižymi geromis fizikomechaninėmis savybėmis ir dideliu terminiu stabilumu, joms degant išsiskiria mažesnis šilumos ir dūmų kiekis. Atliekant degumo bandymus nustatyta, kad PU-PIR putos atitinka reikalavimus, taikomus Е klasės statybinėms konstrukcijoms ir elementams.
Vasilevich, Liliya. "Li-ion titanate technology for SLI battery applications in commercial vehicles." Thesis, KTH, Kemiteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298354.
Повний текст джерелаLithium ion batteries have become quite popular in vehicle applications in the past few decades. This technology offers multiple chemistries to choose from, that are continuously studied and improved. Lithium-titanate-oxide (LTO) batteries use LTO material as an anode, providing long cycling life, as well as essentially eliminating risk for SEI formation and lithium plating. This Master thesis project aimed to investigate how well LTO-based lithium-ion batteries can perform in Start Ignition Lighting (SLI) application in commercial vehicles. The methodology included two engine crank tests with a commercial 12s1p LTO module, charge/discharge tests on a commercial LTO cell with nominal voltage 2.3V, as well as overdischarge cycling tests on assembled pouch cells. The materials for the pouch cells were extracted from a commercial LTO cell and later analysed with SEM-EDX before and after overdischarge tests. The results demonstrated that LTO-based Li-ion batteries can be successfully start a diesel V8 engine even at 39% SoC. Furthermore, when simulating an urban vehicle with an implemented Kinetic Energy Recovery System (KERS) application, a commercial cell LTO cell achieved and retained around 60\%SoC throughout 500 charge/discharge cycles. Combined results from KERS and engine start tests imply that LTO is a strong candidate for replacing lead-acid in these applications. Charge/discharge tests showed that commercial 12s1p LTO cell can maximum reach around 73%SoC when charged in a vehicle-like way. However, this maximum SoC limit was more or less independent of applied charging current. Furthermore, electrochemical overdischarge tests on the pouch cells demonstrated that it is relatively safe to overdischarge the cell 0.4V below the specified safety limit without significant rise in impedance or capacity fade. Major performance losses were attributed to the aging of the NMC-based positive electrode.
Gudas, Mindaugas. "Systematic approach in water quality assessment of Lithuanian rivers in the context of physical, chemical and hyd-robiological parameters." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20110902_144002-20766.
Повний текст джерелаPastaruoju metu tiek Lietuvoje, tiek ir visoje Europos Sąjungoje labai aktualu tinkamai įvertinti vandens telkinių būklę (ypač pagal biologinius kokybės elementus), nustatyti vandens telkinių būklės problemas, jas lemiančius veiksnius bei imtis adekvačių būklės gerinimo priemonių, nes to reikalauja 2000 m. įsigaliojusi ES Bendroji vandens politikos direktyva – pagrindinis vandens sritį reguliuojantis teisinis dokumentas. Šio darbo tikslas - nustatyti žemėnaudos, dirvožemių ir upių vandens fizikinių, cheminių ir biologinių parametrų sąveikos dėsningumus vertinant vandens būklę. Įgyvendinant šį tikslą buvo siekiama sistemiškai įvertinti įvairių veiksnių poveikį Lietuvos upių vandens būklei ir nustatyti jų teritorinius dėsningumus bei įvertinti upių vandens būklės pagal titnagdumblius vertinimo metodų tinkamumą Lietuvos sąlygomis. Šiam tikslui pasiekti naudoti Lietuvos upių valstybinio monitoringo, dirvožemio ir žemės dangos duomenys pasitelkiant faktorinę analizę bei atitinkamus vienmatės statistikos metodus. Rezultatai parodė, kad upių būklę lemiančias priežastis galima patikimai pažinti, kartu vertinant hidrocheminius ir baseinų fizinių charakteristikų, dirvožemių ir žemėnaudos duomenis, jų kompleksiškai tarpusavio ryšių analizei pasitelkus tinkamus daugiamatės ir vienmatės statistikos metodus. Tokia analizė leidžia pažinti ne tik atskirus vandens ekosistemos komponentus, bet ir jų visumą kaip vieną sąveikaujančią sistemą ir priimti kokybiškesnius vandens kokybės valdymo... [toliau žr. visą tekstą]
Urbutis, Aurimas. "Katalizatorių CuO-(CeO2, La2O3)/nešiklis sintezė, savybės ir taikymas lakiųjų aromatinių junginių šalinimo technologijose." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2015. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20150109_113724-95617.
Повний текст джерелаAnthropogenic volatile organic compounds (VOC) are harmful and cause negative impact on air quality, human health and the surrounding environment. Therefore, VOC removal technologies are significant environmental and chemical engineering problem. Volatile aromatic compounds such as benzene, toluene and xylenes (BTX) are ones of the most difficultly decontaminable substances. The most widely studied decontamination technique of VOC is the heterogeneous catalytic oxidation. CuO is one of the most active single metal oxides in VOC oxidation reactions. La, especially Ce and other rare-earth metals and their oxides have gained interest in low-temperature heterogeneous catalytic processes. CuO-CeO2 and CuO-La2O3 dispersed on high specific surface area support may be used as a dual function material – adsorbent-catalyst. Such system concentrates VOC from contaminated air passing through the adsorptive reactor. The adsorbed VOC are then oxidized into CO2 and water vapor by raising the temperature of the adsorbent-catalyst bed. At low concentrations of contaminants this alternative technology becomes more economical compared to conventional VOC catalytic oxidation. The Aim of the work is to develop supported CuO-CeO2 and CuO-La2O3 catalysts, determine their properties and their usage in complete oxidation technologies of benzene, toluene and o-xylene.
Venclavičiūtė, Inga. "Augalinės kilmės preparatų vartojimas savigydai." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140630_134353-68878.
Повний текст джерелаObjective of the Thesis. To determine the most prevalent illnesses among the population of Telšiai Region that are commonly self-treated with plant-derived remedies. Tasks of the Thesis. 1. To examine literature on medicinal plants and their preparations, including their use and self-medication. 2. To interview pharmacy customers and to summarise the obtained results. 3. To determine the most prevalent illnesses and their self-treatment with medicinal plants or their preparations. 4. To identify factors that have the greatest influence on the choice of plant-derived remedies. Research techniques. Research object: opinions of the customers of UAB Nemuno Vaistinė pharmacies in Telšiai regarding the use of herbal preparations for self-treatment purposes. Research methods: quantitative research through questionnaire survey. The research was authorised by the management of UAB Nemuno Vaistinė. It interviewed 400 respondents. Microsoft Office Excel 2007 was used to statistically process the research data. Findings. It was found that women are more frequent customers of the pharmacy (75.5 percent) than men (24.5 percent). In self-treatment, slightly more than half of the surveyed (52.5 percent) prefer chemical preparations to plant-derived ones, while 69.5 percent of the respondents said that the choice of a herbal preparation depends on their own preferences only. Half of the surveyed specified that the main source of information on herbal remedies and their use is information... [to full text]
Fradinho, Bastos Ivan. "Marketing Introduction Plan for the New Generation of Sustainable Circuit Breakers LTA 420 kV : A real-life case for implementation at Hitachi ABB Power Grids." Thesis, KTH, Kemiteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297294.
Повний текст джерелаA circuit breaker is a safety device designed to interrupt power if a problem is detected. There are several kinds of circuit breakers for different applications. Low-voltage circuit breakers are used for household appliances, while high-voltage types are used for transmission networks. High-voltage circuit breakers use sulfur hexafluoride (SF6) gas as an insulating medium, which extinguishes the electric arc that is formed when power is cut. However, it is a huge hazard for the environment, as its global warming potential (GWP) is 23,500 times higher than that of CO2 gas. The company Hitachi ABB Power Grids developed the AirPlus™ technology, which replaces the SF6 gas with a carbon dioxide (CO2) based gas mixture. The presented degree project has evaluated the feasibility of reducing the use of SF6 through the AirPlus™ technology and then developed a strategy for the company Hitachi ABB Power Grids for the market introduction of the eco-efficient LTA 420 kV circuit breaker. This study covers the background research, market evaluation, and market strategy. It was done through research about the AirPlus™ technology and its competitors, so as qualitative and quantitative analysis of the LTA 420 kV circuit breaker implementation in the market. In conclusion, the study shows that the market introduction of the LTA 420 kV circuit breaker is feasible. Although CO2 is not as good an insulation medium as SF6, it is still good and presents strong customer benefits: GWP reduced by over 99.9%, compliance with new regulations, lower cost of ownership, fewer regulatory controls, reduced cost of handling the gas, and well-functioning at extremely low temperatures. The main concerns for Hitachi ABB Power Grids are related to market competition. Thus, it is advisable that the company works on an effective market introduction to assure a large market share.
Mačiūnienė, Rima. "Lietuvos integracijos politika į naująją Europos Sąjungos cheminių medžiagų valdymo strategiją." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20090122_102004-81552.
Повний текст джерелаThe graduating paper analyses the process of solution of problems related to chemicals management in Lithuania from the year 1991 to 2010; deals with certain aspects of practical development of health and environment protection. Since restoration of independance in 1991 Lithuania has no chemicals management system; during transitional period both old USSR legal acts and new legal acts, adopted by independant Lithuanian Government, were in force. Legislation development analysis leads to conclusion that changes were continuous process and the changes were essential. Main chemicals management coordinators in Lithuania were Ministry of Environment and Ministry of Health, as their main field of administration is to protect human health and the environment from risks posed by chemicals. Analysis of official documents shows that transitional period from task formulation until beginning of solution in this specific field lasts about 10 years. Course of resolvement of chemicals handling and management issues in Lithuania from 2000 till 2010 is analysed and certain practical features of health and environmental protection development are considered in the article. Two schemes are presented and analysed in it. One is on Dangerous Chemicals Management System in Lithuania in 2000–2005 based on the Law on Chemical Substances and Preparations and the Law on Poisonous Substances Control (LPSC), another one – Dangerous Chemicals Management System in Lithuania from the second half of the... [to full text]
Čičinskas, Kęstutis. "Sluoksniniai MexOy/γAl2O3 adsorbentai-katalizatoriai alkoholių garų šalinimo technologijose". Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050719_161720-55581.
Повний текст джерелаDabrilaitė, Gitana. "γAl2O3-Cakt-MexOy adsorbentai-katalizatoriai: sintezė, savybės ir panaudojimas". Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050720_111459-83044.
Повний текст джерелаRutkauskaitė, Ramunė. "Mirtinus apsinuodijimus sukėlusių medžiagų saugumo įvertinimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080612_150144-54262.
Повний текст джерелаAim of the study. To find out chemical agents caused lethal poisonings in Vilnius County, to assess chemical safety of these chemical products, and provide possible means of prevention. Methods. The retrospective cohort of 283 lethal poisoning cases was formed using data of four hospitals from Vilnius County in 2002-2006 years. The results were compared with data of State patient fund about all cases of acute poisonings during the same period. SPSS package and MS Excel program were used for statistical analysis. Data were analyzed according to the Chi criteria. Results. Most of lethal poisonings (66 %) were caused by ethyl alcohol and it’s surrogates; other chemical agents were (in declining order): different pharmaceuticals, opioids, unspecified chemical materials, corrosive agents, poisonous gas, food, metals, and technical materials. The average fatality ratio of acute poisonings treated in hospitals was 2.2 %, while the average mortality ratio from acute poisonings between Vilnius County inhabitants was 0.6/10000. The highest mortality ratio (1.3/10000) was found in Trakai municipality , and the lowest (0.2/10000) in– Švenčionys municipality. Half of deaths were in those between 45-64 years old. Due to early death more than 5000 life years were lost. Males accounted for more lethal poisonings cases (70%) than females. Alcohols and opioids as lethal poisonings agents were significantly higher in males than females (p<0.05). Death from corrosive agents and pharmaceuticals... [to full text]
Ženovienė, Renata. "Cheminė Galaktikos kinematinės žvaigždžių grupės sudėtis." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100713_132908-93979.
Повний текст джерелаHelmi et al. (2006) have used a homogeneous data set of 13240 nearby F- and G-type stars from the Nordström et al. (2004) catalogue, containing accurate spatial and kinematic information as well as metallicity and age parameters to search for signatures of past accretion events in the Milky Way Galaxy. From correlation between orbital parameters: apocentre (A), pericentre (P) and z-angular momentum (Lz) so called APL space, they identified tree new coherent groups of stars, that might correspond to the remains of disrupted satellites. The aim of this research is to study chemical composition of one of this stellar group. Using high-resolution spectra (R≈68000) I have derived the chemical composition of 10 F-G-K spectral type stars. High resolution spectra of stars been obtained by the FIES spectrograph on the Nordic Optical Telescope. From these stellar spectra I determined the basics stellar atmosphere parameters: effective temperature Teff [K], surface gravities log g, microturbulent velocities vt [km/s], and abundances of iron, α and s-process elements. The continuum was defined and the equivalent widths of the line measured with the 4A software package. The spectra were analysed using a differential model atmosphere technique with EQWIDTH program package. Models of stellar atmospheres was computed using MARCS code (http://marcs.astro.uu.se). The effective temperature were taken from Nordström et al. (2004). All temperatures were checked so that equal abundance results... [to full text]
Kelpšienė, Rūta. "Topinambo (Helianthus tuberosus l.) gumbų kokybės kitimas laikymo metu." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100609_134243-05939.
Повний текст джерелаAim of work – to research the quality changes of Jerusalem artichoke during storageing. In 2009 the Jerusaelem artichoke tubers were grown in Kaunas distric Babtai, Lithuanian institute of gardening and olericulture. Two selection Jerusalem artichoke lines 05-1 and 05-7 were planted in the begining of may and harvested in November. After that they were kept in temperature +10 for 3 weeks in order to treat the slash. The all examples were put in automatically adjusting fridge KX-10 for 20 weeks (8 kg in four replications), where the temperature was 0 – 2 Celsius and the relative humidity 90 – 95 %. The chemical composition was analysed using standart methods: amount of dry matters, melting dry materials, crude proteins, dietary fiber, amino acids. The research data average and standart deviations was calculated using Microsoft Excel program, correlation analyses – „STAT for EXCEL“ program (Selection, Agrolitpa, 2004. P. Tarakanovas). After five months of storage the amount of dry matters in 05-7 selection line tubers was 2,19 % bigger, than in 05-1 selection line tubers. The bigger melting dry materials, diatary fiber losses (accordingly 1,95% and 0,85%) after five months of storage were determine in 05-1 selection line tubers. The biggest amount of inalterable amino acids arginine and glutamine and the smallest amount of alterable amino acids methionine and proline were determine in both of selection line tubers. After five months of storage the quality of 05-7 selection... [to full text]
Kučinskaitė-, Kodzė Indrė. "Production, Characterization And Application Of New Monoclonal Antibodies Against Viral Antigens." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110630_104940-67693.
Повний текст джерелаDisertacijoje aprašomi monokloniniai antikūnai, sukurti prieš rekombinantinius mielėse susintetintus antigenus: žmogaus paragripo treciojo tipo viruso, Menangle viruso, hantavirusų bei pasiutligės viruso nukleokapsidės (N) baltymus. Sukurtieji antikūnai buvo visapusiškai charakterizuoti įvairiais imunocheminės analizės metodais, įvertintas jų specifiškumas, afiniškumas, sugebėjimas atpažinti natyvius virusus infekuotų ląstelių kultūrose. Buvo nustatyta, kad antikūnai, sukurti prieš rekombinantinius mielėse susintetintus virusų baltymus, tinka virusų nustatymui infekuotose ląstelėse. Šie tyrimai patvirtino, kad rekombinantiniai mielėse susintetinti virusu N baltymai turi panašias antigenines savybes, kaip natyvūs virusų N baltymai, formuojantys nukleokapsides. Sukurtieji monokloniniai antikūnai taip pat buvo panaudoti išsamiems minėtų virusų N baltymų antigeninės struktūros tyrimams bei imunodominuojančių sekų nustatymui. Disertaciniame darbe gauti duomenys svarbūs, kuriant naujas imunodiagnostikos sistemas, skirtas virusų infekcijoms nustatyti. Disertacija sudaro įvadas, trys skyriai, naudotos literatūros sąrašas ir autorės publikacijų sąrašas. Įvadiniame skyriuje aptariama tiriamoji problema, darbo aktualumas, formuluojamas darbo tikslas bei uždaviniai, darbo mokslinis naujumas ir praktinė reikšmė, pristatomos paskelbtos publikacijos ir pranešimai konferencijose. Pirmasis disertacijos skyrius skirtas literatūros apžvalgai: jame apibūdinamos paragripo virusų, Menangle viruso... [toliau žr. visą tekstą]
Bankauskaitė, Agnė. "Hidrotalcito hidroterminė sintezė, savybės ir panaudojimas." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20141105_153254-24425.
Повний текст джерелаIn PhD thesis, the influence of synthesis conditions, the chemical nature of raw materials and additives on the crystallization processes of hydrotalcite and its properties were examined and expedient areas of hydrotalcite application were proposed. It was determined that the modification of Mg containing coumpound as well as the hydrothermal synthesis conditions have a significant infuence on the course of hydrotalcite formation. The optimal conditions of hydrotalcite hydrothermal synthesis in Mg5(CO3)4(OH)24H2O and -Al2O3 mixtures are: the temperature of isothermal curing – 200 °C, duration – 1 h, and primary mixture Mg/Al molar ratio – 2. It was examined that the addition of NaOH and KOH in the primary mixtures, induces not only the interaction between raw materials, but also changes the sequence of obtained intermediate coumpounds during hydrothermal synthesis by reducing the hydrotalcite formation temperature and/or duration. It was determined that by changing the chemical composition of modificated hydrotalcites, the solid-state sintering conditions, microstructure parameters of mixed metal oxides and their nano sized compounds can be controlled. It was examined that chemisorption method is suitable for the immobilization of active components, i. e. transition metal ions, from their solutions into synthetic hydrotalcites. It was determined that hydrothermal synthesis is suitable for the formation of hydrotalcite layer on the Al/Al2O3 surfaces.
Stonkutė, Edita. "Galaktikos storojo disko žvaigždžių cheminė evoliucija." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080924_174731-10676.
Повний текст джерелаThe aim of this research is to study the Galactic thick disk chemical evolution. Using high-resolution spectra I have derived the chemical composition of a sample of Galactic thick disk stars. High resolution spectra of 9 F-G-K spectral type stars in the Galactic thick disk have been obtained by the SOFIN spectrograph on the Nordic Optical Telescope. From these stellar spectra I determined the basics stellar atmosphere parameters: effective temperatures Teff [K], surface gravities lg g, microturbulent velocities vt [km/s], and abundances of oxygen, iron, α, r- and s-process elements in the Galactic thick disk. The results are similar to those of other investigations: Tautvaišienė et al., 2001; Bensby et al., 2004, 2005, 2007; Reddy et al., 2006. For a given [Fe/H] the stars with kinematics typical of the thick disk are more enriched in oxygen and α- process elements (Mg, Si, Ca, Ti) than the stars with kinematics typical of the thin disk. The abundance of other elements (Al, Na, Cr, Ni, V, Sc, Mn, Co, Cu, Y, Zr, Ba, La and Nd) is similar for the two disks. The abundance ratios of oxygen, α, r- and s-process elements to iron provide further evidence that the thick disk star population have a different chemical history compared to the thin disk. The stars formation rate was probably higher in the Galactic thick disk than in the Galactic thin disk.
Mikšytė, Evelina. "Kalio trąšų formų, normų ir jų derinių su EPSO Microtop trąšomis įtaka miežių derliui." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090608_123823-39519.
Повний текст джерелаFertilizing field experimentation was done in 2007 and 2008 year at the experimental station of Lithuanian University of Agriculture. Spring rape, spring barley plus under-crop, perennial grass I years of using, winter wheat are grown in four-field rotation of crops. Purpose of the experimentation was to evaluate the influence of potassium fertilizer forms, its norms and it's combinations on spring barley with EPSO Microtop fertilizers. Spring barley breed 'Ūla' was used for the experimentation. Potassium chloride, potassium salt (Korn-Kali) norms and the additional fertilizing through leaves with EPSO Microtop (2 x 20 kg ha-1) the effectiveness of spring barley crop was researched in the experimentation. The experimentation shoved that potassium and EPSO Microtop fertilizers made the yield of spring barley 'Ūla' increase. Grain yield increased from 8,8 % to 18,8 % and straw yield - from 10,5 % to 25,5 % when comparing year 2007 with the control. Best yields were obtained when fertilizing with K90 Korn-Kali norm and EPSO Microtop (2 x 20 kg ha-1) fertilizers. These fertilizer norms were effective in year 2008 also because in comparison with the control the obtained grain yield addition was 6,8 % -16,3 % and straw yield addition - 9,5 % -17,6 %. The crude protein content in grains, after fertilization with MOP - K90 rate increased 10, 37 percent. pc. Grain quality was better in 2008, when grain proteins up to 10.63 % and in 2007 just 10.40 %. NEM controls the maximum number of... [to full text]
Mačiulskis, Kęstutis. "Medžiagų liekanų gyvūnų ir gyvūninių maisto produktų mėginiuose stebėsenos analizė 2009–2012 m. Lietuvoje." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140519_092605-13784.
Повний текст джерелаAim of this work was to analyse residue prevalence in samples of live animals and animal origin products in 2009–2012 in Lithuania. Results were compared and summarized by epidemiological description method using statistical calculations and determining of confidence interval of an arithmetical mean value of the estimate in order to show reliability of estimates. In 2009–2012 Lithuania fulfilled the requirements for sampling frequency of bovines, pigs, ovine and goats, horses, rabbits, milk, inland fish and honey. Requirements for sampling frequency of farmed game animals, wild game animals, poultry and eggs in some instanced were not fulfilled. 0.39 % in 2009, 0.28 % in 2010, 0.55 % in 2011 and 0.39 % animal samples did not conform to legal requirements. 0.43 % in 2009, 0.3 % in 2010, 0.17 % in 2011 and 0.13 in 2012 animal origin food samples did not comply with legal requirements.
Kairytė, Ieva. "Monokloninių antikūnų prieš Hendra ir Nipah virusų nukleokapsidės baltymus gavimas ir charakterizavimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080625_122938-82635.
Повний текст джерелаThe aim of this study was to generate monoclonal antibodies against Hendra and Nipah virus nucleocapsid proteins. There is high homology between nucleocapsid proteins of Henipavirus genus members, therefore it is difficult to generate monoclonal antibodies that do not show any cross-reactivity with both antigens. This problem was solved by using recombinant chimeric proteins designed by insertion of non-homological segments of Hendra and Nipah virus nucleocapsid proteins into the mouse polyomavirus capsid protein VP1. Mice were immunized with these chimeric proteins and it was determined that they induce a strong immune response. Monoclonal antibodies against Nipah virus nucleocapsid protein as well as carrier protein – mouse polyomavirus capsid protein VP1 – were generated. The specificities of newly developed monoclonal antibodies were confirmed by ELISA and immunoblot. The generation of specific monoclonal antibodies against Hendra virus nucleocapsid protein failed.
Vengraitytė, Loreta. "Skirtingų veislių kiaulių mėsos cheminė sudėtis." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050415_104801-94311.
Повний текст джерелаMeškauskaitė, Kristina. "Kauno miesto asmens sveikatos priežiūros įstaigų radiologijos skyriuose dirbančių darbuotojų darbo aplinkos ir sveikatos tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080619_145317-17466.
Повний текст джерелаProfessional health of workers in health care system depends on volume and specifics of work. Nowadays, the significance of radiology tests is relatively high, and the number of tests is increasing. Wide application of sources of ionization and chemical substances is directly related with the risk of occupational diseases for health care staff working under such conditions. Aim of the study: to evaluate the health complaints and its relationship with work conditions of radiology departments' staff (radiologists and laboratory workers) at Kaunas health care settings. Material and methods. The study was conducted in January–February 2008. The sample included radiology staff of 8 health care settings in Kaunas. Anonymous questionnaire was received from 188 subjects (response rate 77,5%). The questionnaire was constructed for evaluation of health and work conditions. Statistical data analysis was performed using statistical package „SPSS for Windows 13.0“. Results. Altogether, 87,8% of staff works in ionized environment and 47,9% in chemically polluted conditions. The requirements of security at work are fulfilled by 62,2% of responders. More than half of responders (56,9%) relate their subjective health changes with work environment. Among laboratory workers this relationship is stronger than among radiologists (p<0,05). Conclusions. Current health status is estimated as good among one third of responders (more by radiologists than laboratory workers). Most common health... [to full text]
Banionytė, Inga. "Propolio etanolinių ekstraktų cheminės sudėties tyrimas ir antioksidacinio aktyvumo vertinimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090609_154307-15257.
Повний текст джерелаPropolis (bee glue) is a resinous material that honeybees collect from poplar, birch or other plants (the plant source depends on the geographic origin of propolis). Because of its popularity in folk medicine, propolis has become the subject of intense pharmacological and chemical studies for the last 30 years. Numerous studies have proven its versatile pharmacological activities. One of the most important is its antioxidant activity. The objective of this study was to identify and compare the main active substances in the ethanolic extracts of propolis and to evaluate their antioxidant activity. The classical maceration method was used for the production of liquid ethanolic extracts of propolis (the concentration of used ethanol: 50%, 60%, 70%, 80% and 96%). The quality of popolis was evaluated by gravimetric, spectrophotometric and High Performance Liquid Chromatography with Diode Array and Mass Spectrometric detectors (HPLC-DAD-MS) methods. The results of the HPLC-DAD-MS analysis showed that one of the main phenolic acids in the ethanolic extracts of propolis is ferulic acid. That was the reason for using it as a standard in the spectrometric analysis of total phenolic compounds. Spectrophotometric method showed about 10 times higher results than the analysis with the standard of pinocembrin and galangin mixture (2:1). The highest concentrations of phenolic compounds were found in the extracts made with the ethanol of 70%, 80% and 96% concentrations. The antioxidant... [to full text]
Jancevičius, Darius. "Topinambų (Helianthus tuberosus L.) gumbų laikymo sąlygų optimizavimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090615_115515-78715.
Повний текст джерелаThe chemical composition during storage of tuber in Jerusalem artichoke cv. ‘Swojecki’, grown on pomological garden of Lithuanian University of in 2006 was assayed. By means of Standard methods the quantity of dry substance, soluble dry substance, total, reducing sugar, sucrose, raw fibre, raw proteins, amino acids also mass losses were estimated. For statistic analysis arithmetic average and standard deviation was calculated using MC EXCELL. To evaluate data validity statistic (P≤0,05) program „Statistica“ were used. It was established, that after four storage month the amount of dry matter in tubers which have been storage in polypropylene bags was 2,2 time bigger if compare those with tubers in peat or sand. Essential largest losses amounts of soluble dry matter, raw fibre also raw proteins (correspondingly 4,0%, 1,5 % and 4%) have been estimated in tubers which were storage in polypropylene bags. According results the essential smallest amounts of total saccharides, also sucrose where accumulated in tubers after two moth independent where they have been storage. Essential largest amounts of reducing sugars during all storage period have been estimated in tubers which were storage in polypropylene bags. During all storage period independent storage method the largest indispensable amino acid arginine also replaceable glutamine and the smallest amounts of methyonine and tyrosine have been established. The smallest mass losses during all storage period have been identify... [to full text]
Mikolaitis, Šarūnas. "Evoliuciniai cheminės sudėties efektai padrikųjų spiečių raudonosiose milžinėse." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120913_085509-91530.
Повний текст джерелаOpen clusters are important tools for studying of the Galactic disk and for understanding stellar evolution. Stars of clusters have constant age, composition and distance. This makes them to be excellent laboratories for investigations of stellar and Galactic chemical evolution. The main aim of the study is the analysis of mixing tracers and extra mixing evidences in photospheres of evolved stars. Extra-mixing processes may modify the surface abundances of 12^C/13^C and 12^C/14^N ratios. This study aims to test theoretical models. The secondary goal is a contribution to the study of present properties of the Galactic disc. The 12^C/13^C ratios in helium-core-burning clump stars for the clusters with turn-off masses lower than 2 solar masses are in agreement with the Cool-bottom processing (CBP) model and the Thermohaline mixing (TH) model. The observed 12^C/13^C ratios of the helium-core-burning stars in the open cluster NGC 6134 support evidences of larger then theoretically predicted extra-mixing in stars heavier than 2.5 solar masses. In two open clusters the 12^C/13^C ratios in core-helium-burning stars are lower than in the first ascent giants, located above the RGB luminosity bump. This could be caused by the material mixing during a very violent helium flash event. Almost all element to iron ratios show essentially flat radial abundance distributions across Galactic disk. The radial distributions of [O/Fe] and [Mg/Fe] have a tendency to increase towards larger... [to full text]
Steniukynaitė, Eglė. "Įvairių cheminių medžiagų įtaka Listeria monocytogenes bakterijoms mėsos žaliavoje." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140618_232406-07929.
Повний текст джерелаThe goal of the research is to determine the influence of various chemicals on Listeria monocytogenes bacteria in raw meat (beef). Raw meat was purchased in various markets of meat and meat products. The resistance of Listeria monocytogenes to various chemicals like lactic acid, acetic acid, cinnamaldehyde, chlorine dioxide was tested in the laboratory. These chemicals were used in various concentrations: lactic acid – 2 %, 3 %, 4 %, 5 %, acetic acid – 2 %, 3 %, 5 %, cinnamaldehyde – 0,5 %, 1,5 %, 3 %, chlorine dioxide – 5 ppm and 15 ppm. Resistance was evaluated by infecting raw beef. The effects of these chemicals to the total number of microorganisms was also determined. The research revealed that the most influencing chemical from the ones tested was lactic acid. Within 48 hours the amount of L. monocytogenes decreased 129 times and the total number of microorganisms decreased 22,6 times (p<0,05). While comparing the effects of the chemicals used in the research it was determined, that lactic acid and chlorine dioxide has a stronger negative impact on the growth of L. monocytogenes bacteria and cinnamaldehyde and acetic acid has a bigger influence on the total number of microorganisms.
Bičius, Žydrūnas. "Organinių azoto trąšų „Provita“ įtaka ekologiškai auginamų bulvių derlingumui, derliaus kokybei ir dirvožemio savybėms." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090608_123352-64507.
Повний текст джерелаResearch on the effect of organic nitric fertilizers Provita to organically cultivated potatoes performed in 2008 at the experimental station of Lithuanian University of Agriculture highlighted, that fertilization of potatoes with organic nitric fertilizers Provita, as well as combinations of organic nitric fertilizers Provita with Patenkali and phosphorite powder, significantly increased total and marketable harvest of potatoes, as well as merchantability of harvest. In case of fertilization with Provita, Patenkali and phosphorite powder, as well as Provita and Patenkali, total and marketable harvest of potatoes was significantly increased, compared with fertilization using Provita and the combination of Provita and phosphorite powder. After fertilization of potatoes with Provita, Provita and Patenkali as well as Provita, Patenkali and phosphorite powder, the concentration of starch in potatoes was significanlty lower, than in these never fertilized. After fertilization of potatoes with organic nitric fertilizers Provita, the concentration of dry matterial in potatoes was significantly decreased, compared to these never fertilized, or fertilized with Provita, combinations of kalium and phosphoric fertilizers. Fertilization of potatoes had no significant effect to the concentration of soluble dry matterial in potatoes. Fertilization with organic nitric fertilizers Provita resulted in negative nitric balance. Fertilization with standard volume of organic nitric fertilizers N... [to full text]
Vaišvilienė, Vaida. "Lignino, struktūrinių, nestruktūrinių angliavandenių bei baltymų kaupimosi miglinių žolių biomasėje dėsningumai." Bachelor's thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120831_091055-02802.
Повний текст джерелаThe objective of this study was to evaluate the changes in moisture content, morphological parts ratio, regularities of chemical components (protein, lignin, structural and non-structural carbohydrates) accumulation in plant biomass and different morphological parts of perennial ryegrass (Lolium perenne L.) and reed canary grass (Phalaris arundinacea L.) depending on plant development stages and to compare diurnal variation of water soluble carbohydrate (WSC) concentrations in above-ground dry matter in the two perennial grass species tested.
Varvaštian, Samvel. "Nanomedicinos teisinis reglamentavimas: ES ir JAV požiūris." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130205_094831-00731.
Повний текст джерелаThe master thesis researches the current regulation of nanomedicine in the EU and the US. Until now, this topic has not yet been researched in Lithuania. In the first part of the thesis nanomedicine and the problem of nanomedicine-related definitions are introduced to the reader. The second part reveals the basis of the regulation of nanomedicine in the EU, and the third part – in the US. Furthermore, considering the achieved results, the perspective of the future regulation of nanomedicine is assessed. The thesis extensively analyses the legal acts of the chosen subjects of international law and specific legal literature (documents of various institutions, works of law scholars) as well as some scientific-technical literature (reports and researches of various institutions and organizations, scientists’ researches).
Folmer, Natalija. "Aukštesniųjų alkoholių ir kitų fuzelio junginių bei fizikinių cheminių rodiklių skirtumai lager ir elio tipo aluje." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140618_232804-07885.
Повний текст джерелаTasks of work: To identify the higher alcohols and other fusel oil compounds in beer samples; Rate higher alcohols and other compounds changing tendencies in lager-type beers and ale-type beers; to determine the differences of physico-chemical parameters of different beer producers; to perform a comparative evaluation of the test samples safety. The methods used in experiment: content of the Ca(calcium) and Zn (zink) was investigated by atomic absorption flame spectrometry method; pH – with pH meter "Mettler Toledo 220, according to the manufacturer's instruction. Original extract, the amount of alcohol was determined in accordance with LST Beer 1572:2004. Ethyl alcohol concentration, real and original extract determination. Vikinal dicetones and bitterness set the Brewers Convention, Official Journal of the methods: EBC. Journal of European Brewers Convencion, Analytica EBC 9.2.4.1 Vikinal diketones in beer. Spektrofotometrical method, 2000. 5th edition. Set of bitterness method given the Journal Brewers Convention Journal, Analytica EBC 9.8 beer bitterness, 1997. 5 th edition. Higher alcohols and other fusel oil compounds was determine by gas chromatography method. Results: The higher alcohols in beer showed that the highest intensivity of flavor and aroma is in Ale- type of beer, and in lager-type beer these compounds content was found lower. Higher alcohols and other fusel oil compounds were depended on beer type. Physical chemical characteristics of beer were different... [to full text]
Butkutė, Valė. "Aktinidijų uogų cheminės sudėties priklausomybė nuo meteorologinių sąlygų." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100609_134304-07095.
Повний текст джерелаThe investigation of Actinidia kolomikta cultivars ‘Laiba’, ‘Lanke’, ‘Lande’, ‘Paukstes Sakarva’, grown in Lithuanian University of Agriculture polomogycal garden, chemical composition of berries were caried out during the period of 2008 – 2009. The amount of dry agent, dry deliquescent agent, ascorbic acid, crude ash, crude fibre, crude protein, amino acids and the average berry weight were investigated by standart methods. During investigation there were analyzed the influence of meteorological conditions to A. kolomikta berries chemical composition. The investigation showed the highest weight of A. kolomikta ‘Paukstes Sakarva’breed fruits - 3,22 g. The smallest berries of A. kolomikta breed ‛Lankė’ - 2,09 g. The average weight of berry - 2,64 g. The biggest amounts of dry matters were established in fruits of ‘Laiba’ cultivar – 21,08 %, the smallest amount in fruits of ‘Lande’ cultivar – 18,02 %. The biggest amounts of dry deliquescent matters were established in fruits of ‘Laiba’ cultivar plants –12,72 %, the smallest amount in fruits of ‘Paukstes Sakarva’ cultivar plants – 10,83 %. The biggest amounts of ascorbic acid were determined in ripe fruits of cultivar ‛Lande’- 5479,86 mg kg-1, the lowest level of ascorbic acid were established in immature fruits of cultivar ‘Lanke’ – 2698,25 mg kg-1. Cultivar ‘Laiba’ accumulated the highest contents of crude ash in dry agent of berries (about 6,20 % on average).
Gregorauskienė, Virgilija. "Cheminių elementų kiekių kaitos dėsningumai Lietuvos dirvožemio profilyje." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20121227_090556-03063.
Повний текст джерелаVertical alternation of chemical composition in Lithuanian soil profile has been investigated in the study. Investigations are based on the certified analytical data, by applying standard mathematical–statistical data processing that enables to justify the vertical distribution patterns of trace and major elements and obtain internationally comparable concluding results on the national soil geochemistry. Soil grain size analysis and chemical analysis of separated sand, silt and clay particles revealed the relation between the soil grain size and chemical composition. Investigation of chemical composition of the soil parent material reflected its dominance as soil forming factor. Geochemical survey of the 74 individual soil profiles, representing all soil regions and main soil types, allowed to expose various soil forming processes and on its background to generalize geochemical features and ascertain the dominant ones in the sand–loamy sand and the loam–clay soil of Lithuania. On the base of original geochemical data the model geochemical soil profile was created and the dominant geochemical process was determined – element depletion and removal out of soil profile prevails in Lithuania.
Garbarienė, Inga. "Atmosferos aerozolio submikroninės frakcijos dalelių kilmė, cheminė sudėtis bei formavimasis." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140520_134611-00264.
Повний текст джерелаThe objective of the work was to investigate physical and chemical properties and sources of the atmospheric aerosol particles in the submicron fraction by combining different analytical techniques. The dependence of concentrations of organic and elemental carbon in different air masses was determined and the contribution of regional and local sources to the net aerosol particle pollution was estimated. Analysis of the size distribution of carbonaceous aerosol particles in background and urban areas was performed. Biogenic organic aerosol made up 15 % of the organic aerosol mass at the Preila atmospheric pollution research station, but in the North Atlantic air masses this factor was up to 50 %. Aerosol and stable isotope ratio mass spectrometry has revealed that traffic is the primary source of aerosol particles in the city, while biomass burning is the primary source at the Rūgšteliškis background station. It was determined that secondary anthropogenic organic compounds were dominating (76 %) in Vilnius, while in Rūgšteliškis secondary biogenic organic compounds made up 50 % of the total organic aerosol mass. The influence of the long-range air mass transport on the local origin aerosol particle formation and transformation has been evaluated and it has been shown that volcanic aerosol particles can significantly change the concentration, chemical composition and size distribution of local aerosol particles in the submicron range.
Gerulytė, Justina. "Konservavimo būdų įtaka sausmedžio uogų kokybei." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140613_095704-28520.
Повний текст джерелаResearch object – six cultivars of blue-honeysuckle berries: 'Atut', 'Duet'‚ 'Karina', 'Fialka', 'Dlinoplodnaja' and 'Kalakolcik'. Research aim – to choose the method of preservation and to evaluate its influence on the quality of honeysuckle berries. Research methods: chemical composition of berries (the amount of ascorbic acid (mg 100 g-1), dry matter, crude fibre, crude protein, crude ash, %), sensory analysis (taste and aroma, texture, external attractiveness) and biometric indicators (weight, length and diameter) were evaluated using standardized methods. All research data was tested statistically. Research results. Independent of the method of preservation, 'Karina' berries were characterized by the highest amount of ascorbic acid, whereas 'Atut' had the highest amount of dry matter. The highest amount of crude fibre, crude protein and crude ash was related to frozen 'Atut' berries, meanwhile lyophilized 'Kalakolcik' berries contained the highest amount of crude protein and crude ash. 'Karina', 'Kalakolcik' and 'Dlinoplodnaja' berries were characterized by the best organoleptic properties. Fresh berries of 'Duet' cultivar as well as frozen and lyophilized berries of 'Atut' cultivar had the largest weight. It is recommended that honeysuckle berries be lyophilized since this particular way of preservation was characterized by the best sensory properties and nutritional value of berries. It was determined that the quality parameters of berries were affected by the genetic... [to full text]
Prodan, Alina. "Sigmametrijos taikymas kokybei klinikinės chemijos laboratorijoje gerinti." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2011~D_20140627_165708-70661.
Повний текст джерелаStudy‘s author: Alina Prodan Final medical biology Master‘s Degree study on „Application of Sigma Metrics for Quality Improvement in Laboratory of Clinical Chemistry“ Research adviser: Dr. Dalius Vitkus, Vilnius University, Medical Faculty, Department of Physiology, Biochemistry and Laboratory medicine. Reviewer: Assoc. Prof. Valerija Jablonskienė, Vilnius University, Medical Faculty, Department of Physiology, Biochemistry and Laboratory medicine Introduction. Modern laboratory is seeking to perform higher number of tests, using fewer funds while still achieving highest quality. Six Sigma methodology is a concept of basic quality improvement geared towards a process standardization. Sigma-metrics is used in Six Sigma quality management as a universal measure of quality. This quality assessment approach based on analysis of quality requirements. Statistical results of quality control analysis have been widely used for Master’s Degree study. Benefits of sigma-metrics for quality goals evaluation have been shown. The research presents quality requirement importance. Quality control procedures demonstrated significance for the quality of test. Aim of the study – to asess application of sigma-metrics for quality improvement in laboratory of clinical chemistry. Results. 12 of 20 researched analytes results did not meet the desirable quality goals. After applying sigma-metrics it was found, that ALAT and CK met the world class quality requirements. According to strict quality... [to full text]
Dunauskaitė, Rimantė. "Linijinių ir hibridinių rapsų žiemojimo ypatumai šiltėjančio rudens periodo sąlygomis." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110603_114440-43883.
Повний текст джерелаThe experiment carried out in the Experimental Station of Lithuanian University of Agriculture in 2009 – 2010. The soil is shallow calcareous Luvisols (Calc(ar)i-Epihypogleyic Luvisol). The aim of our investigation was to determine the effect of sowing time of winter oilseed rape on autumn rosette chemical composition and over-wintering. Chemical composition of rossete of winter rape sown at different time influenced crop over-wintering – significant correlation between this indicators was established. The stronger influence of the winter rape rosette composition on over-wintering was established in rape of linear cultivar ‘Sunday‘ than in rape of hybrid cultivar ‘Kronos‘.Winter rape of hybrid cultivar over-wintered better – 39, 2–77,0%, winter rape of linear cultivar – 12,8–54,0%. Winter rape sown on 30 August – 5 September best over-wintered. They acumulated 15,23–18,14% of dry matter, 4,61–5,69% of total sugar, N and K ratio was 1,64–1,76 in leaves, and in apical bud – 18,01–19,68% of dry matter, 6,00–8,49% of total sugar, N and K ratio was 1,49–1,69 and in roots – 17,46-18,37% of dry matter, 7,71-10,30% of total sugar, N and K ratio was 1,05-1,56. Winter rape of hybrid cultivar sown at later dates prepared for over-wintering more intensively. Winter rape of both cultivars sown at the latest date not over-wintered. Over-wintering depended winter rape rosette on the chemical composition: dry matter and total sugar content, and the N and K ratio.