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Voltametrijska karakterizacija i određivanje odabranih neonikotinoida primenom različitih elektroda na bazi ugljenika / Voltammetric characterization and determination of selected neonicotinoids using different carbon-based electrodesPapp Zsigmond 31 January 2011 (has links)
<p><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:PunctuationKerning /> <w:ValidateAgainstSchemas /> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables /> <w:SnapToGridInCell /> <w:WrapTextWithPunct /> <w:UseAsianBreakRules /> <w:DontGrowAutofit /> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--><!--[if gte mso 10]> <mce:style><! /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0pt 5.4pt 0pt 5.4pt; mso-para-margin:0pt; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} --><!--[endif] --></p><p class="MsoBodyText" style="margin-bottom: 0.0001pt;">U disertaciji je izvršena voltametrijska karakterizacija i određivanje pet neonikotinoidnih insekticida (imidakloprida, tiametoksama, klotianidina, nitenpirama i acetamiprida) na različitim elektrodama na bazi ugljenika, kao što su elektroda od ugljenične paste, elektroda od staklastog ugljenika i bizmut-filmom modifikovani staklasti ugljenik. Pored ispitivanja u model-rastvorima, razvijene visokoosetljive diferencijalne pulsne voltametrijskemetode su primenjene za određivanje neonikotinoida u realnim uzorcima. Neonikotinoidi su određivani u uzorcima rečne vode i komercijalnim formulacijama, a praćena je i njihova fotolitička i fotokatalitička razgradnja. Radi potvrđivanja voltametrijskih rezultata, izvedena su komparativna merenja uz primenu tečne hromatografije sa detektorom od niza dioda i infracrvenespektrometrije. Detekcija pojedinih degradacionih proizvoda nastalih u toku ispitivanih fotodegradacionih procesa je praćena tečnohromatografskom metodom sa tandemskom masenospektrometrijskom detekcijom. Proučavana je površinska struktura CR 5 grafitnog praha, elektrode od ugljenične paste na bazi trikrezil-fosfata i elektrode od staklastog ugljenika pomoću skenirajuće elektronske mikroskopije.</p> / <p>This thesis is concerned with the voltammetric characterization and determination of five neonicotinoid insecticides (imidacloprid, thiamethoxam, clothianidin, nitenpyram and acetamiprid) at different carbon-based electrodes such as carbon paste, glassy carbon and bismuth-film modified glassycarbon. In addition to the investigations in model solutions, the developed highly sensitive differential pulse voltammetric methods were applied for the determination of neonicotinoids in real samples. Neonicotinoids were determined in river water samples, commercial formulations, and their photolytic and photocatalytic degradation was also monitored. To confirm the voltammetric results, comparative measurements were performed by liquid chromatography with diode-array detector and infrared spectrometry. Detection of some degradation products formed during the photodegradation processes was monitored using liquid chromatography with tandem mass-spectrometric detection. The surface structure of CR 5 graphite powder, tricresyl phosphate-based carbon paste electrode and glassy carbon electrode was investigated by scanning electron microscopy.</p>
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Efeitos do inseticida thiamethoxam no desenvolvimento, na produtividade da cana-de-açúcar e no controle de Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) / Effect of thiamethoxam insecticide in development, yield of sugarcane and control of Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae)PEREIRA, Jaqueline Magalhães 15 February 2008 (has links)
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Previous issue date: 2008-02-15 / The objective of the present work was to determine the physiologic effects of
thiamethoxam in sugarcane crop. This study was conducted at Escola de Agronomia e
Engenharia de Alimentos of Universidade Federal de Goiás , in Goiânia, and at
commercial areas and seedlings of nursery of Usina Jalles Machado S/A , in Goianésia,
Goiás State, Brazil, in period from December of 2006 to November of 2007. Three
experiments were conducted, being one without and two with the presence of root
froghopper Mahanarva fimbriolata. In these experiments, thiamethoxam was used in the
doses 0 g of active ingredient (i.a.).ha-1, 100 g i.a.ha-1, 150 g i.a.ha-1e 200 g i.a.ha-1, with
application accomplished in December end, being evaluated the number of nymphs of
January to May, and in the crop, the yield and technological parameters. To evaluate the
thiamethoxam effect in the initial development of the plants two experiments they were
led: one in acrylic boxes (3,5 x 11 x 11 cm) with substrate and other in tubes of PVC (0,20
x 1,20 m) with soil. In the first the variety was used RB867515, with the same doses of the
field experiments, being evaluated development of the above-ground part and roots, third
days after the application of the insecticide. In tubes, conducted the experiment in factorial
scheme, with two varieties (RB867515 and SP80-1816) and six doses (0 g, 50 g, 100 g,
150g, 200 g and 250 g i.a.ha-1), being evaluated the parameters, tillers number, height,
diameter of stem, length of the roots, shoot and root dry matter mass, 130 days after the
application of the insecticide. In the field experiments, all the thiamethoxam doses were
efficient in the population reduction of M. fimbriolata, not differing statistical between
itself. The thiamethoxam application made possible increment in the agricultural
productivity of 7,98 t.ha-1, with increase in the industrial revenue. The technological
parameters were not influenced by the thiamethoxam application. In acrylic boxes there
was increment of up to 3,7 times in the mass it evaporates of the roots in treated seedlings
with thiamethoxam. In tubes of PVC, effect of thiamethoxam doses was observed in the
increase of the diameter and dry weight of roots. / O objetivo do presente trabalho foi determinar os efeitos de thiamethoxam na
fisiologia da cana-de-açúcar. A pesquisa foi conduzida nas áreas comerciais, no viveiro de
mudas da Usina Jalles Machado S.A., no município de Goianésia, GO e na estufa do Setor
de Manejo Integrado de Pragas, Escola de Agronomia e Engenharia de Alimentos,
Universidade Federal de Goiás, no período de dezembro de 2006 a novembro de 2007.
Foram conduzidos três experimentos em campo, sendo um sem e dois com a presença da
cigarrinha-das-raízes Mahanarva fimbriolata. Nestes experimentos, utilizou-se
thiamethoxam nas doses de 0 g de ingrediente ativo (i.a.).ha-1, 100 g i.a.ha-1, 150 g i.a.ha-1 e
200 g i.a.ha-1, com aplicação realizada no final de dezembro, avaliando-se a população da
cigarrinha-das-raízes de janeiro a maio, e na colheita, a produtividade e as características
tecnológicas. Para avaliar o efeito de thiamethoxam no desenvolvimento inicial das plantas
foram conduzidos dois experimentos: um em caixas de acrílico (3,5 x 11 x 11 cm) com
substrato e outro em tubos de PVC (0,2 x 1,20 m) com solo. No primeiro foi utilizada a
variedade RB867515, com as mesmas doses dos experimentos de campo, avaliando-se
desenvolvimento da parte aérea e sistema radicular aos trinta dias após a aplicação do
inseticida. Nos tubos, conduziu-se o experimento em arranjo fatorial, 6 x 2, com duas
variedades (RB867515 e SP80-1816) e seis doses de thiamethoxam (0 g i.a.ha-1, 50 g
i.a.ha-1, 100 g i.a.ha-1, 150 g i.a.ha-1, 200 g i.a.ha-1 e 250 g i.a.ha-1), avaliando-se as
características número de perfilhos, altura, diâmetro do colmo, comprimento das raízes,
massa seca do sistema radicular e da parte aérea, aos 130 dias após a aplicação do
inseticida. Nos experimentos de campo, todas as doses de thiamethoxam foram eficientes
na redução populacional de M. fimbriolata, não diferindo estatisticamente entre si. A
aplicação de thiamethoxam possibilitou incremento na produtividade agrícola de até 7,98
t.ha-1, com aumento no rendimento industrial. As características tecnológicas não foram
influenciadas pela aplicação de thiamethoxam. Em caixas gerbox houve acréscimo de até
3,7 vezes na massa seca do sistema radicular em mudas tratadas com thiamethoxam. Em
tubos de PVC, observou-se efeito das doses de thiamethoxam no aumento do diâmetro e
massa seca das raízes.
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Elucidating the Effects of Thiamethoxam Neonicotinoid on Honey Bee Learning Using the Proboscis Extension ResponseShepherd, David J 01 May 2017 (has links)
In this study, the effects of the neonicotinoid pesticide, thiamethoxam, are examined through the Proboscis Extension Response (PER) in honey bees (Apis mellifera). PER is a form of classical conditioning applied to honey bees through scent and reward association which quantifies learning rates. Results between groups treated with thiamethoxam did not differ significantly from untreated control groups. Potential reasons for these results are discussed. The method and experimental apparatus for testing the PER assay are also discussed.
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Desempenho de sementes de milho tratadas com tiametoxam em função da dose e armazenamento / Performance of maize seeds treated with the product thiamethoxam based in rates and storageNunes, João Carlos da Silva 05 August 2008 (has links)
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Previous issue date: 2008-08-05 / The objective of this work was to verify the immediate and latent
effects of the insecticide Thiamethoxam 350 FS, on physiological quality of
maize hybrid seeds. Fifteen high quality hybrids of Monsanto company were
utilized, studied through three variables: three rates of the insecticide
Thiamethoxam as follow : 0, 0.7 and 1.05 mg of active ingredient/60,000 maize
seeds; five storage periods (0, 3, 6, 9 e 12 months) e two storage types (15oC
and without temperature control). The three parameters of evaluation were:
germination, cold test and field emergence, all of them conducted in the
Aprosmat Seed Testing Laboratory. The data were discussed based on
statistical analysis about the isolated effect of the product Thiamethoxam and
the ambient/storage interaction in which were obtained the following
conclusions: 1 The maize seed can be treated with Thiamethoxam and
remain stored for a period of one year under climatized environment; 2 An
overrate of 50% above the recommendation does not affect the field
emergence of the maize seeds; 3 Maize seed on a conventional environment
without temperature and moisture control maintain their quality until six months
of storage.; 4 High physiological quality of maize seeds can be stored for
about 1 year on an environment with temperature below 20oC. / O objetivo do presente trabalho foi verificar o possível efeito
imediato e latente do inseticida Tiametoxam 350 FS sobre a qualidade
fisiológica de sementes de milho híbrido. Utilizaram-se 15 híbridos da empresa
Monsanto, sendo que as variáveis foram: três doses do inseticida 0, 0,7 e
1,05mg./60.000 sementes; cinco períodos de armazenamento (0, 3, 6, 9 e 12
meses) e dois tipos de armazenamento (15oC e umidade relativa de 60% e
sem controle de temperatura). Os parâmetros de avaliação foram: germinação,
teste de frio e emergência em campo, conduzidos do laboratório de sementes
da Aprosmat. Os dados foram discutidos conforme análise estatística sobre o
efeito isolado do produto Tiametoxam e a interação ambiente/armazenamento
no qual se obtiveram as seguintes conclusões: 1 As sementes de milho
podem ser tratadas com Tiametoxam e armazenadas até um ano em ambiente
climatizado.; 2 A emergência em campo não é afetada pelo tratamento de
sementes de milho com o inseticida Tiametoxam mesmo em dosagem 50%
acima da recomendada; 3 Sementes de milho tratadas com Tiametoxam,
mantêm sua qualidade fisiológica por até seis meses de armazenamento em
ambiente convencional;
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