Chitosan in Eucalyptus grandis Pyroligneous Liquor for Agricultural Application: Physicochemical and Structural Characterization During Storage

Porto, Fabiane Grecco da Silva; Vasconcelos, Eduardo dos Santos; Campos, Arlene; Carreño, Neftalí Lênin Villarreal; Garcia, Irene Teresinha Santos

doi:10.1007/s10924-020-01980-9

Cited by 4 publications

(4 citation statements)

References 38 publications

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“…Another emerging agricultural application is plant films made of biodegradable polymers. Da Silva Porto et al reported that chitosan dissolved in distilled pyroligneous liquor(DPL) could be used to produce protective films of plants that have strong UV light absorption capability [44]. Besides applications as films, some research showed that they could be used to construct disposable plant pots.…”

Section: Current Study On Agricultural Applicationsmentioning

confidence: 99%

A review on biodegradable polymer: Shortcomings, developments, and future direction

Xue

2023

ACE

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With the continuous progress and development of the world's economy and science, people's awareness of environmental protection has gradually increased. Polymer materials have brought great convenience to modern people's daily life and work, and their application fields are becoming wider. However, on the one hand, the comprehensive application of polymer materials has greatly improved our level of people's daily life, and on the other hand, it also brings a certain pollution to the environment. Because some traditional polymer composites can not degrade immediately, there may be a big problem of pollution and emission. Therefore, how to develop a biodegradable polymer material has become a research hotspot. This paper reviewed the current market share of biodegradable polymers, the classification of current biodegradable polymers, and the applications of biodegradable polymers. By providing that information, this paper aims to help understand the big picture of biodegradable polymers and contribute to their future developments.

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Section: Current Study On Agricultural Applicationsmentioning

confidence: 99%

A review on biodegradable polymer: Shortcomings, developments, and future direction

Xue

2023

ACE

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“…The PA was comprised of 75% three-to five-year-old Eucalyptus (Eucalyptus grandis [Hill ex Maiden]) and 25% five-to seven-year-old Neem (Azadirachta indica [Juss.]) wood [25] with a rate of 30 mL L −1 of water [26]. The PA was prepared following the methodology described by Campos [27].…”

Section: Fungicidesmentioning

confidence: 99%

“…In this study, the application of PA did not lead to significantly lower disease progression and higher yield compared to azoxystrobin or the non-treated control, likely due to high variability between plots. Inconsistency in disease reduction might also be related to the environmental degradation of antifungal compounds [25]. In contrast, applications of PA have been successful in other pathosystems, significantly reducing the incidence of Peronospora parasitica and S. sclerotiorum by 12.14% and 17.33%, respectively [82].…”

Section: Effectiveness Of Integrating Asd and Fungicide Programs Unde...mentioning

confidence: 99%

Integrated Pathogen Management in Stevia Using Anaerobic Soil Disinfestation Combined with Different Fungicide Programs in USA, Mexico, and Paraguay

et al. 2023

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Stevia is a semi-perennial crop grown to obtain the diterpene glycosides in its leaves, which are processed to manufacture non-caloric sweeteners. Anaerobic soil disinfestation (ASD) and fungicide application were evaluated for the management of stevia stem rot (SSR) and Septoria leaf spot (SLS) in lab and field experiments. In 2019 and 2021, experiments using carbon sources for ASD were carried out in microplots at NCSU (Clayton, NC, USA). In 2020/21 and 2021/22 seasons, field experiments were conducted at CSAEGRO, Mexico (MX) and CEDIT, Paraguay (PY) using a 2 × 3 factorial design with two ASD treatments and three fungicide treatments. ASD treatments included soil amended with cornmeal (MX) or wheat bran (PY) at a rate of 20.2 Mg ha−1, molasses at 10.1 Mg ha−1, and non-amended controls. Fungicide applications included chemical (azoxystrobin), organic (pyroligneous acid, PA), and a non-treated control. ASD was effective in reducing sclerotia viability of Sclerotium rolfsii in laboratory assays (p < 0.0001) and microplot trials (p < 0.0001) in NC. During field trials, the viability of sclerotia was significantly reduced (p < 0.0001) in soils amended with cornmeal + molasses or wheat bran + molasses as carbon sources for ASD. While there was no significant effectiveness of ASD in reducing SLS in 2020 and 2021 or SSR in MX 2020 field trials (p = 0.83), it did exhibit efficacy on SSR in 2021 (p < 0.001). The application of fungicides was significantly effective in reducing SSR (p = 0.01) and SLS (p = 0.001), with azoxystrobin being the most consistent and PA not being statistically different from the control or azoxystrobin. The effects of ASD on fresh yield were inconsistent, exhibiting significant effects in Mexican fields in 2020 but not in 2021. During Paraguayan field trials, ASD only significantly interacted with fungicide applications in the dry yield in 2022. In the 2020/21 MX and 2020 PY field trials, fungicides were significantly effective in enhancing dry leaf yields, with azoxystrobin showing the highest consistency among treatments and PA variable control. In conclusion, utilizing ASD alongside organic fungicides can be a valuable tool for stevia farmers when the use of chemical fungicides is limited. Further research is required to enhance consistency and reduce the costs associated with these treatments under diverse edaphoclimatic conditions.

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“…Os compostos fenólicos também tem potencial antimicrobiano e estão presentes no extrato pirolenhoso, podendo contribuir para o desenvolvimento de revestimentos funcionais (PORTO et al, 2021). É importante ressaltar que a atividade antibacteriana e antifúngica do extrato não remete somente a um grupo químico, mas a sua complexidade de compostos como os grupos ácidos e os grupos fenólicos.…”

Section: Ensaio De Atividade Microbiológicaunclassified

Extrato pirolenhoso como preservante de madeira e retardante de chama em situação de incêndio

Andrade¹

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O objetivo geral foi investigar a eficiência do extrato pirolenhoso e de um aditivo ignífugo (diamônio) como tratamento curativo e retardante de chama, visando suas aplicabilidades em madeiras estruturais. O estudo foi realizado em três etapas, na primeira etapa foi realizada a caracterização química do extrato pirolenhoso (EP). Foi identificado em maior área por CG- EM, o composto fenólico siringol (15,54%) e os ácidos carboxílicos, ácido butanoico (10,28%) e ácido acético (7,52%). O tratamento com 20% de EP apresentou maior redução de extrativos e lignina em relação à amostra controle, assim como maior perda de massa na análise termogravimétrica (TG). Não houve efeito significativo na resistência mecânica à compressão paralela às fibras e no módulo de ruptura (MOR) das madeiras sem e com tratamento. Na segunda etapa, foi realizado os ensaios microbiológicos simulando dois ambientes. A amostra controle e a com 10% de EP apresentaram atividades de microrganismos, enquanto para os tratamentos com 20% e 30% de EP não apresentaram. O mesmo comportamento foi observado para o ensaio com cupins. Com 20% e 30% de EP apresentaram uma mortalidade de 57,5% e 62,0%, com dano moderado e superficial, respectivamente. Por meio da técnica de densitometria de raios X para obtenção de imagens, foi possível observar a formação das galerias. No ensaio com fungos, as menores perdas de massa, foram observadas para os tratamentos com 20% (1,62%) e 30% (1,83%) do EP. Na terceira etapa, a resistência ao fogo foi realizado pelo método de propagação de chamas (Schlyter modificado) e a combustibilidade com tratamentos de 20% e 30% de EP com adição do diamônio em concentrações de 3% e 5%. Foi observado a alteração da cor com a aplicação dos tratamentos com EP, porém a mudança foi “muito apreciável” para o mercado. Para o teste de propagação de chamas, a testemunha teve perda de massa de 25,18%. Enquanto que entres os tratamentos com EP a maior perda de massa foi de 0,75% para a amostra com 20% de EP + 5% de aditivo. O aumento da temperatura média foi maior no tratamento testemunha, atingindo máximas de temperatura em 71,7 oC, 85,6 oC e 61,4 oC para altura superior, média e inferior dos termopares, respectivamente. Já os tratamentos com 20% e 30% de EP com as diferentes concentrações de aditivos, as máximas de temperatura não ultrapassaram 38 oC. Para a combustibilidade, o tratamento controle e com 20% de EP permaneceram ao final do ensaio com 20% de massa inicial, já o tratamento com 30% de EP, permaneceu com 40%. Ao aplicar o aditivo químico, os tratamentos com 20% e 30% de EP, permaneceram com cerca de 50% da massa inicial. Conclui-se que o EP foi eficaz e se mostrou um excelente aditivo contra agentes xilófagos e na formulação de retardante de chama. Mostrou-se uma alternativa ecologicamente correto e agregando valor a um coproduto carbonização da madeira, reduzindo a emissão de gases do efeito estufa. Palavras-chave: Construção civil. Madeira tratada. Propagação superficial de chamas. Situação de incêndios.

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Chitosan in Eucalyptus grandis Pyroligneous Liquor for Agricultural Application: Physicochemical and Structural Characterization During Storage

Cited by 4 publications

References 38 publications

A review on biodegradable polymer: Shortcomings, developments, and future direction

A review on biodegradable polymer: Shortcomings, developments, and future direction

Integrated Pathogen Management in Stevia Using Anaerobic Soil Disinfestation Combined with Different Fungicide Programs in USA, Mexico, and Paraguay

Extrato pirolenhoso como preservante de madeira e retardante de chama em situação de incêndio

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