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	<title>Pesquisas &#8211; B.Nano</title>
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		<title>A Mechanistic View of Interactions of a Nanoherbicide with Target Organism</title>
		<link>https://bnano.com.br/pesquisa/a-mechanistic-view-of-interactions-of-a-nanoherbicide-with-target-organism/</link>
		
		<dc:creator><![CDATA[maristela]]></dc:creator>
		<pubDate>Sat, 26 Apr 2025 00:42:49 +0000</pubDate>
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					<description><![CDATA[Foliar absorption and field herbicidal studies of atrazine-loaded polymeric nanoparticles A atrazina é um dos herbicidas mais utilizados e está associada à contaminação persistente de águas superficiais e subterrâneas. Para solucionar esse problema, este estudo desenvolveu uma formulação herbicida mais eficaz por meio da nanoencapsulação de atrazina em poli(ε-caprolactona) (NC+ATZ). A interação dessa formulação com &#8230; <a href="https://bnano.com.br/pesquisa/a-mechanistic-view-of-interactions-of-a-nanoherbicide-with-target-organism/" class="more-link" title="Continue reading <span class="screen-reader-text">A Mechanistic View of Interactions of a Nanoherbicide with Target Organism</span>">Continue reading <span class="screen-reader-text">A Mechanistic View of Interactions of a Nanoherbicide with Target Organism</span></a>]]></description>
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									<h4>Foliar absorption and field herbicidal studies of atrazine-loaded polymeric nanoparticles</h4>								</div>
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									<p>A atrazina é um dos herbicidas mais utilizados e está associada à contaminação persistente de águas superficiais e subterrâneas. Para solucionar esse problema, este estudo desenvolveu uma formulação herbicida mais eficaz por meio da nanoencapsulação de atrazina em poli(ε-caprolactona) (NC+ATZ).</p>								</div>
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									<p>A interação dessa formulação com plantas de <em>Brassica juncea</em> foi analisada, avaliando a absorção foliar e as alterações estruturais induzidas. Após a aplicação pós-emergente, NC+ATZ aderiu às folhas e penetrou no mesofilo principalmente pelas hidatódios. A formulação foi transportada diretamente pelos tecidos vasculares até as células, degradando os cloroplastos e resultando em atividade herbicida.</p>								</div>
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									<p>O sistema de nanocarreadores utilizado demonstrou grande potencial para aplicações agrícolas, garantindo manutenção da atividade herbicida em baixas concentrações e aumentando significativamente sua eficácia.</p>								</div>
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									<p><strong>Autores:</strong></p><p>Aline Bertolosi Bombo<br />Anderson Espírito Santo Pereira<br />Makeli Garibotti Lusa<br />Eliana de Medeiros Oliveira<br />Jhones Luis de Oliveira<br />Estefânia Vangelie Ramos Campos<br />Marcelo Bispo de Jesus<br />Halley Caixeta Oliveira<br />Leonardo Fernandes Fraceto<br />Juliana Lischka Sampaio Mayer</p>								</div>
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		<title>A new approach in the reduction of harmful ecotoxicological effects</title>
		<link>https://bnano.com.br/pesquisa/a-new-approach-in-the-reduction-of-harmful-ecotoxicological-effects/</link>
		
		<dc:creator><![CDATA[maristela]]></dc:creator>
		<pubDate>Sat, 26 Apr 2025 00:08:49 +0000</pubDate>
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					<description><![CDATA[Chitosan nanoparticles containing the insecticide dimethoate: A new approach in the reduction of harmful ecotoxicological effects Inseticidas organofosforados, como o dimetoato (DMT), são amplamente utilizados na agricultura, mas podem contaminar corpos d’água e causar danos a organismos aquáticos. O desenvolvimento de nanopesticidas surge como uma alternativa inovadora para aumentar a eficácia no controle de pragas &#8230; <a href="https://bnano.com.br/pesquisa/a-new-approach-in-the-reduction-of-harmful-ecotoxicological-effects/" class="more-link" title="Continue reading <span class="screen-reader-text">A new approach in the reduction of harmful ecotoxicological effects</span>">Continue reading <span class="screen-reader-text">A new approach in the reduction of harmful ecotoxicological effects</span></a>]]></description>
										<content:encoded><![CDATA[		<div data-elementor-type="wp-post" data-elementor-id="1417" class="elementor elementor-1417">
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									<h4 class="item-page-title-field"><span class="dont-break-out">Chitosan nanoparticles containing the insecticide dimethoate: A new approach in the reduction of harmful ecotoxicological effects</span></h4>								</div>
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									<p>Inseticidas organofosforados, como o dimetoato (DMT), são amplamente utilizados na agricultura, mas podem contaminar corpos d’água e causar danos a organismos aquáticos. O desenvolvimento de nanopesticidas surge como uma alternativa inovadora para aumentar a eficácia no controle de pragas agrícolas e reduzir os efeitos toxicológicos desses compostos. Com base nisso, este estudo investigou a encapsulação do DMT em nanopartículas de alginato-quitosana (nanoDMT) e avaliou seus efeitos toxicológicos em organismos não-alvo. As nanopartículas foram caracterizadas por DLS, NTA e AFM, além de terem seu perfil de liberação analisado. A toxicidade foi avaliada em embriões e larvas de <i>Danio </i><i>rerio</i> (zebrafish), considerando letalidade, morfologia e comportamento, e comparando nanopartículas vazias (NP), DMT encapsulado (nanoDMT), DMT técnico (NP + DMT) e formulações comerciais (cDMT). As nanopartículas apresentaram tamanho hidrodinâmico médio de 301 ± 7 nm, PDI de 0,45 ± 0,02, potencial zeta de -27,9 ± 0,2 mV e eficiência de encapsulação de 75 ± 0,32%, com liberação controlada ao longo do tempo (52% após 48 h). As imagens de AFM mostraram morfologia esférica para ambos os tipos de nanopartículas. Os efeitos tóxicos mais acentuados no desenvolvimento embrio-larval foram observados para o dimetoato comercial, seguido pelo pesticida técnico, principalmente nas concentrações mais altas. Embora o dimetoato encapsulado tenha apresentado um aumento na LC50–96 h em relação ao pesticida técnico, o comportamento das larvas não foi afetado. Os dados obtidos indicam que a nanoencapsulação do dimetoato reduz sua toxicidade em larvas de zebrafish, sugerindo que essa tecnologia pode tornar os inseticidas mais seguros para espécies não-alvo, minimizando efeitos colaterais e promovendo uma agricultura mais sustentável.</p>								</div>
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									<h5><b>Principais resultados:</b></h5><p>A nanoencapsulação do dimetoato reduz sua toxicidade em organismos não-alvo, como larvas de <i>Danio </i><i>rerio</i>, promovendo uma alternativa mais segura e sustentável para o controle de pragas agrícolas.</p>								</div>
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									<p><strong>Autores:</strong></p><p>Vallim, José Henrique<br />Clemente, Zaira<br />Castanha, Rodrigo Fernandes<br />do Espírito Santo Pereira, Anderson <br />Campos, Estefânia Vangelie Ramos <br />Assalin, Márcia Regina<br />Maurer-Morelli, Cláudia Vianna<br />Fraceto, Leonardo Fernandes <br />de Castro, Vera Lúcia Scherholz Salgado</p>								</div>
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		<title>Foliar absorption and field herbicidal studies of atrazine-loaded polymeric nanoparticles</title>
		<link>https://bnano.com.br/pesquisa/foliar-absorption-and-field-herbicidal-studies-of-atrazine-loaded-polymeric-nanoparticles/</link>
		
		<dc:creator><![CDATA[maristela]]></dc:creator>
		<pubDate>Wed, 08 Aug 2018 06:18:38 +0000</pubDate>
				<guid isPermaLink="false">https://labtechco-demo.pbminfotech.com/?post_type=ts-portfolio&#038;p=6896</guid>

					<description><![CDATA[Foliar absorption and field herbicidal studies of atrazine-loaded polymeric nanoparticles Nanopartículas carregadas com atrazina demonstram eficácia no controle de plantas daninhas mesmo com doses menores do ingrediente ativo. As alterações no modo de ação do herbicida por meio da nanoformulação são essenciais para compreender a eficiência da atividade pós-emergente da nanoatrazina. Neste estudo, foram avaliadas &#8230; <a href="https://bnano.com.br/pesquisa/foliar-absorption-and-field-herbicidal-studies-of-atrazine-loaded-polymeric-nanoparticles/" class="more-link" title="Continue reading <span class="screen-reader-text">Foliar absorption and field herbicidal studies of atrazine-loaded polymeric nanoparticles</span>">Continue reading <span class="screen-reader-text">Foliar absorption and field herbicidal studies of atrazine-loaded polymeric nanoparticles</span></a>]]></description>
										<content:encoded><![CDATA[		<div data-elementor-type="wp-post" data-elementor-id="105" class="elementor elementor-105">
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									<h4>Foliar absorption and field herbicidal studies of atrazine-loaded polymeric nanoparticles</h4>								</div>
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									<p>Nanopartículas carregadas com atrazina demonstram eficácia no controle de plantas daninhas mesmo com doses menores do ingrediente ativo. As alterações no modo de ação do herbicida por meio da nanoformulação são essenciais para compreender a eficiência da atividade pós-emergente da nanoatrazina.</p>								</div>
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									<p>Neste estudo, foram avaliadas a absorção foliar e a translocação da nanoatrazina e da atrazina utilizando técnicas radiométricas, além da comparação dos efeitos herbicidas em condições de casa de vegetação e campo. A nanoatrazina apresentou taxas de absorção maiores e mais rápidas nas folhas de mostarda em comparação com a formulação comercial, com um aumento de 40% na absorção do herbicida após 24 horas da aplicação. Isso resultou em uma maior inibição da atividade do fotossistema II. Ensaios com folhas tratadas com fusicoccina indicaram que a absorção estomática das nanopartículas pode estar envolvida na melhora da eficácia da nanoatrazina.</p>								</div>
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									<p>A nanoencapsulação potencializou a atividade herbicida pós-emergente da atrazina, com um ganho de eficiência maior em condições de campo do que em casa de vegetação. Independentemente da dose, a nanoatrazina proporcionou um controle de plantas daninhas duas vezes maior no campo em comparação com a atrazina comercial. Assim, o desenvolvimento desse sistema carreador melhora o desempenho do herbicida no campo, reduzindo as perdas ambientais do ingrediente ativo devido à absorção mais rápida.</p>								</div>
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									<p><strong>Autores:</strong></p><p>Takeshita, Vanessa<br />de Sousa, Bruno Teixeira<br />Preisler, Ana Cristina<br />Carvalho, Lucas Bragança <br />Pereira, Anderson do Espirito Santo <br />Tornisielo, Valdemar Luiz<br />Dalazen, Giliardi<br />Oliveira, Halley Caixeta<br />Fraceto, Leonardo Fernandes</p>								</div>
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			</item>
	</channel>
</rss>
