Comparação das metodologias da Farmacopéia Brasileira para determinação de água em matérias-primas vegetais, e validação da determinação de água em analisador de umidade para Calendula officinalis L., Foeniculum vulgare Miller, Maytenus ilicifolia Mart. ex. Reissek e Passiflora alata Curtis

Borges, Daniela B.; Farías, Mareni Rocha; Simões, Cláudia Maria Oliveira; Schenkel, Eloir Paulo

doi:10.1590/s0102-695x2005000300013

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…De fato, durante o processo de secagem do material vegetal pode haver perda de princípios ativos voláteis e/ou termolábeis (Borges et al, 2005). Com exceção de P. anisum (erva-cidreira), não existem evidências científicas a respeito da possibilidade de tais perdas nas outras espécies citadas.…”

Section: Discussionunclassified

"O que vêm da terra não faz mal": relatos de problemas relacionados ao uso de plantas medicinais por raizeiros de Diadema/SP

Lanini¹,

Duarte-Almeida²,

Nappo³

et al. 2009

Rev. bras. farmacogn.

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Divulgação"O que vêm da terra não faz mal" -relatos de problemas relacionados ao uso de plantas medicinais por raizeiros de Diadema/SP Unitermos: Reações adversas, intoxicações, plantas medicinais, fitofarmacovigilância, entrevistas semi-estruturadas.ABSTRACT: "Natural and therefore free of risks" -adverse effects, poisonings and other problems related to medicinal herbs by "raizeiros" in Diadema/SP". Traditionally, medicinal herbs have been considered gentle and harmless because of their natural origin: "natural and therefore free of risks". However, toxic potential, various consumer-related factors (such as age, disease factors, pregnancy, etc), contamination, and lack of regulation concerning quality control are some of the risk factors deemed to be associated with herbal adverse reactions, poisonings and other complications. Over a 7-month period, semi-structured interviews were carried out with 20 "raizeiros" (traditional healers) in Diadema/SP. We found 40 unexpected events related to 22 species of medicinal herbs. The most frequent species reported were Luffa operculata -"buchinha" (7 reports), Senna alexandrina -"sene" (4 reports) and Paullinia cupana -"guaraná" (3 reports). Among the adverse events, the most frequent signs and symptoms reported involved the central nervous, gastrointestinal and cardiovascular systems. They also reported one case of abortion (related with S. alexandrina) and three deaths related with L. operculata. Adverse events that result from "natural" medicines are relatively uncommon, but they certainly occur more often than acknowledged. Medicinal plants are traditionally considered as innocuous, but as commercially available medicinal products they require sanitary surveillance in order to identify their risks, to give them a legal status, to evaluate their efficacy and to ascertain their safety.

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Section: Discussionunclassified

"O que vêm da terra não faz mal": relatos de problemas relacionados ao uso de plantas medicinais por raizeiros de Diadema/SP

Lanini¹,

Duarte-Almeida²,

Nappo³

et al. 2009

Rev. bras. farmacogn.

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“…As partes do marmeleiro, devidamente acondicionados, foram submetidas ao método de determinação por dessecação (BORGES, 2005), EM ESTUFA A 35ºc até atingir peso constante (aproximadamente 72 horas). Após o processo de secagem das partes das plantas, elas foram trituradas e reduzidas a partículas pequenas (35 milímetros) com auxílio de um moinho de facas tipo Willey SL-31 no laboratório de tecnologia da Madeira na Universidade Federal Rural do Semi-Árido (UFERSA).…”

Section: Materiais E Métodosunclassified

Perfil fitoquímico de extratos etanólicos e metanólicos do Croton blanchetianus

Silva¹,

Filho²,

Oliveira³

et al. 2021

RBM

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O Brasil é considerado o país com a maior biodiversidade do mundo e um dos seus biomas, a Caatinga, possui elevada heterogeneidade vegetacional e endemismo, o que torna esse ambiente de extrema importância biológica. Apesar de ser um bioma onde o estudo das plantas medicinais é bastante explorada, a Caatinga ainda possui muitas espécies de plantas que não foram devidamente analisadas, entre essas espécies existem o Croton blanchetianus, conhecido popularmente como marmeleiro-do-mato, com informações acerca de suas propriedades medicinas ainda com lacunas. Sendo assim, o objetivo desse estudo foi analisar a composição fitoquímica dos extratos etanólicos e metanólicos das folhas e raízes do Marmeleiro (Croton blanchetianus). A pesquisa foi de natureza qualitativa e de caráter experimental. A coleta da espécie foi no Sítio Chafariz, zona rural da cidade de Mossoró- RN, onde foram coletadas as raízes e folhas da planta. Após a identificação da espécie foram aplicadas técnicas de farmacognosia e bioprospecção, para possibilitar a obtenção dos extratos, onde em seguida foram realizadas as análises fitoquímicas dos extratos. Por meio da triagem fitoquímica, pôde-se observar reações colorimétricas sugestivas de alcaloides, saponinas, quinonas e compostos fenólicos, especificamente, taninos e cumarinas. Não foi possível identificar flavonoides em nenhum dos extratos. Essas substâncias presentes nos extratos do marmeleiro, indicam uma possível presença de propriedades terapêuticas relativo à planta, sendo necessários estudos mais aprofundados sobre o Croton blanchetianus.

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“…It consists on submitting the analyzed sample to cycles of oven heating followed by cooling and weighing, with the mass loss calculated at the end of each cycle. The "Water Determination in Vegetable Drugs" assay is but an adaptation of the "Loss on Drying" assay for materials of plant origin: the two methods only differ in parameters such as quantity of sample utilized (2 to 5 grams for materials of plant origin, versus 1 to 2 grams of samples in general), length of the drying step (5 hours for materials of plant origin, versus 2h for samples in general, except when specified otherwise) and stopping criteria (assays using materials of plant origin are stopped when the weighing difference does not exceed 5 milligrams, while the other assays in general are stopped when the sample keeps a constant weight across two weightings) (Farias, 2002;Borges et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Aiming to reduce the necessary amount of time to perform each analysis, methods with more efficient heat sources were introduced (Isengard & Präger, 2003;Isengard & Breithaupt, 2009). Moisture Analyzers or Moisture Determiners are appliances that consist on a scale attached to an infrared radiation heating system that provides faster liberation of the water molecules than the convective heat utilized in conventional drying ovens (Borges et al, 2005). However, this more intense heat can make the analyzed samples more susceptible to thermal degradation, causing them to release a greater amount of volatile compounds that can be incorrectly accounted in the mass loss calculation as water content (Isengard & Präger, 2003;Isengard & Breithaupt, 2009).…”

Section: Introductionmentioning

confidence: 99%

Determination of Water Content in Tea Samples of Cymbopogon Citratus S., Matricaria Recutita L., Mentha Spp. And Pimpinella Anisum L. Through Gravimetric and Thermogravimetric Methods

Maciel¹,

Steppe²

2017

Drug Anal. Res.

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The excess of humidity in materials of plant origin allows the action of enzymes, which can cause degradation of chemical components and enable fungi and bacteria development. The humidity determination is one of the most important and most used measurements in food analysis, as it is tightly related to food quality, stability and composition. Teas are among humanity’s most popular and most broadly diffused drinks, being the most common form of phytoterapeutical products and a natural source of chemical substances with activity against a broad variety of ailments. Humidity determination in teas of Cymbopogon citratus S., Matricaria recutita L., Mentha spp. and Pimpinella anisum L was performed through pharmacopoeia-standards gravimetric analysis, drying by infrared radiation and thermogravimetry, and the results obtained by each method were compared. All humidity indexes obtained were in accordance with the currently available official specifications. Water content values obtained by the pharmacopoeia-standards assay, infrared radiation assay and thermogravimetry presented statistical difference between them, due to the methods’ technical features or the utilized materials’ physical characteristics; still the thermogravimetry and the infrared radiation assay were the methods that presented the least statistical difference between their results. The pharmacopoeia-standards method presented itself as the more adequate method for the determination of water content in materials of plant origin, like teas.

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Cited by 6 publications

References 4 publications

"O que vêm da terra não faz mal": relatos de problemas relacionados ao uso de plantas medicinais por raizeiros de Diadema/SP

"O que vêm da terra não faz mal": relatos de problemas relacionados ao uso de plantas medicinais por raizeiros de Diadema/SP

Perfil fitoquímico de extratos etanólicos e metanólicos do Croton blanchetianus

Determination of Water Content in Tea Samples of Cymbopogon Citratus S., Matricaria Recutita L., Mentha Spp. And Pimpinella Anisum L. Through Gravimetric and Thermogravimetric Methods

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