Publications by authors named "Valter P de Almeida"

Article Synopsis
  • The study investigates the medicinal properties of Kalanchoe plants, known as "miracle leaf," focusing on K. crenata, K. marmorata, and K. pinnata for their healing effects and active components.
  • It employs histochemical and phytochemical analyses to compare phenolic and flavonoid contents, as well as antioxidant capabilities among the three species.
  • Results show that K. marmorata has superior antioxidant properties compared to the others, providing valuable insights for future research on Kalanchoe plants.
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Article Synopsis
  • Essential oils from five species were tested for their effectiveness in deterring biting and toxicity against yellow fever mosquitoes and imported fire ants.
  • Some essential oils matched DEET's effectiveness at lower concentrations, while others were less effective, particularly against mosquitoes.
  • Key active compounds, kongol and spathulenol, showed significant deterrent effects and varying levels of toxicity against both mosquitoes and fire ants.
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Viscum album L. (Santalaceae) is an important medicinal plant traditionally used to treat several diseases, including cancer therapy. This paper provides detailed morpho-anatomical characteristics of the leaves, stems and berries of Viscum album subsp.

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This article enumerates the detailed anatomy of Cantinoa althaeifolia (Lamiaceae) illustrated with light and scanning electron microscopy images. The anatomical markers include the presence of branched nonglandular trichomes and capitate, peltate, and clavate types of glandular trichomes; prismatic crystals on the leaf and stem surfaces; and oil droplets in the leaf mesophyll. Histochemical tests and EDS analyses were performed in order to detect the composition of certain cells and their contents.

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Although leaves of are used in Brazilian traditional medicine, there is no available data in the literature proving its efficacy and safety. Thus, the aim of the study was to perform a meticulous botanical, phytochemical, toxicological, and pharmacological investigation of in Wistar rats. At first, a morphoanatomical characterization of leaves and stems was performed.

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Ethnopharmacological Relevance: Talinum paniculatum (Jacq.) Gaertn. (Talinaceae), popularly known as "major gomes" and "erva gorda", is a non-conventional food plant extensively distributed throughout the Brazilian territory.

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Ethnopharmacological Relevance: Celosia argentea L. (Amaranthaceae), popularly known as "crista de galo", is used in folk medicine due to its diuretic and hypotensive effects. However, there are no reports in the literature regarding its pharmacological effects on the cardiovascular system as well as no data proving the safety of this species.

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Ethnopharmacological Relevance: Although Luehea divaricata Mart. (Malvaceae) is popularly used by the population of the Brazilian Pantanal for the treatment of different types of kidney diseases, no study has been carried out to prove this ethnobotanical indication.

Aim: To investigate the possible cardiorenal effects of an herbal preparation obtained from L.

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Ethnopharmacological Relevance: Acanthospermum hispidum DC. is an important medicinal herb that belongs to family Asteraceae, popularly used as a diuretic and hypotensive in the region of Pantanal, state of Mato Grosso do Sul, Brazil. Despite the relevance of this species throughout the country, there are no detailed studies about its possible ethnobotanical indication.

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