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Letteratura scientifica selezionata sul tema "Petersianthus Macrocarpus"

Autore: Grafiati

Pubblicato: 19 ottobre 2024

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Articoli di riviste sul tema "Petersianthus Macrocarpus"

Massiot, Georges, Chen Xiang-Fei, Catherine Lavaud, Louisette Le Men-Olivier, Clement Delaude, Alain Viari, Paul Vigny e Jacques Duval. "Saponins from stem bark of Petersianthus macrocarpus". Phytochemistry 31, n. 10 (ottobre 1992): 3571–76. http://dx.doi.org/10.1016/0031-9422(92)83729-i.

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Ambombo Onguene, E. M., L. D. Kono, J. B. Ngola, J. A. Messi Effa, L. F. Menyene Etoundi, M. A. Mbarga Bindzi e E. Youmbi. "Variations in abundance of Imbrasia epimethea (Lepidoptera: Saturniidea) on Petersianthus macrocarpus in different forest types in Central Cameroon". African Journal of Tropical Entomology Research 2, n. 2 (20 agosto 2023): 39–49. http://dx.doi.org/10.58697/ajter020206.

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Edible caterpillars are of vital importance to rural communities in developing countries providing high protein values and income. However, their ecology particularly seasonal fluctuations in their numbers is still poorly understood. With the ongoing climate change and increasing deforestation, their survival is a crucial issue. The aim of this study was to assess the structural characteristics of Petersianthus macrocarpus (Lecythidaceae) on the abundance of edible caterpillars of Imbrasia epimethea (Saturniidea). The forest area on the outskirts of Yaoundé is an important production basin for edible caterpillars making a perfect medium to answer questions on the variations in the abundance of caterpillars of I. epimethea in relation to the forest type of P. macrocarpus. Concerning biometric parameters, the [20-30[ cm diameter class in agroforest had more edible caterpillars (31.1 %). In the secondary forest and swamp forest, it was the [50-60[ cm diameter class with respectively 34 % and 27.4 %. In terms of height, the [30-40[ m height class contained more edible caterpillars (68.50 %), whereas the [60-70[ m height class represented the stratum with the least edible caterpillars (5.10 %). In different forest types, the abundance of caterpillars of I. epimethea according to the social status of P. macrocarpus individuals showed that caterpillars are found in abundance preferentially on dominant individuals (52.7 % in swamp forest, 49.7 % in secondary forest and 45.6 % in agroforest). The mean abundance of I. epimethea caterpillars was higher in secondary forest (563 ± 62 caterpillars) compared to agroforest and swamp forest. In contrast, swamp forest had the lowest mean abundance of edible caterpillars (375 ± 24 caterpillars) according to the social status of P. macrocarpus. These results point way to a better understanding of the use and management of an economically important NTFP.

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Mitashi Kimvula, Jules, Constantin Lubini Ayingweu, Hippolyte Nshimba Seya e Nicolas Picard. "Recruitment limitation of Petersianthus macrocarpus in eastern DRC: seed or establishment limitation?" Revue d'Écologie (La Terre et La Vie) 65, n. 4 (2010): 369–75. http://dx.doi.org/10.3406/revec.2010.1544.

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Adesegun, SundayAdeleke, CelestinaIfeoma Orabueze e HerbertAlexander Coker. "Analgesic and antioxidant activities of stem bark extract and fractions of Petersianthus macrocarpus". Pharmacognosy Research 8, n. 3 (2016): 181. http://dx.doi.org/10.4103/0974-8490.182912.

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Nwanochi, Elsie Chinem, Ada Mercy Ugbe, John Nwolim Paul, Anelechi Kenneth Madume, Confidence Waribo Ihua, Chioma Akunnaya Ohanenye, Mandah Chimezunem, Azumah Mercy Kelechi e Chizam Treasure Nwokanma. "Effect of ethanolic leaf extracts of petersianthus macrocarpus on Haematological Parameters and Lipid Profile of Streptozotocin Induced Type 2 Diabetic Wistar Rats". Cross Current International Journal of Medical and Biosciences 5, n. 04 (6 dicembre 2023): 96–100. http://dx.doi.org/10.36344/ccijmb.2023.v05i04.004.

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Background: The most prevalent kind of diabetes that results from insulin resistance is type 2. Hyperglycemia, polyphagia, polyuria, and polydipsia are the traditional trifecta of symptoms associated with this illness. The purpose of this study was to ascertain the impact of petersianthus macrocarpus ethanolic leaf extract on the lipid profile and haematological markers of streptozotocin-induced type 2 diabetic wistar rats. Materials and methods: Five groups of rats were used: non-diabetic, diabetic, untreated, glibenclamide-treated, ethanolic extract-treated, and 100 mg/kg body weight-treated. Results: The body weight of the rats treated with 100 mg/kg body weight increased, while the body weight of the rats treated with 50 mg/kg body weight decreased, according to the results. Conclusion: 100 mg/kg body weight was determined to be the least effective therapeutic dose, indicating the potential of ethanolic leaf extracts.

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Marfo, Eric D. "Chemical modification of Petersianthus macrocarpus (essia), to determine whether durability depends on bulking or hydroxyl substitution". Journal of Energy and Natural Resource Management 3, n. 3 (24 febbraio 2018): 92–96. http://dx.doi.org/10.26796/jenrm.v3i3.64.

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Wood is a biodegradable material. Decay resistance of wood is improved when the wood is chemically modified. The decayresistance of a chemically modified wood is improved as the modification stabilizes the cell wall polymers against enzyme attackdue to the blocking of accessible hydroxyl groups of the cell wall polymers which reduces the amount of water for hydrolysis. Theimproved durability of the modified wood as a result of reducing the amount of water molecules into the cell wall for hydrolysiswill depend on either bulking or percentage hydroxyl substitution (%OH). Petersianthus macrocarpus (essia), a tropical hardwoodspecies was chemically modified with acetic anhydride (AA) and pentanoic anhydride (PA) in dry pyridine to improve its decayresistance. Graveyard test was used to analyze the effect of the modification on the decay resistance of the wood in twelve weeksin-ground contact. Percentage weight loss and visual decay grades were used to evaluate whether the decay resistance dependson weight percentage gain or percentage hydroxyl substitution. The decay resistance of the modified samples were found to bedependent on bulking.

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Abankwa, Agnes, e Rosemary Acquaye. "Assessment of Nutritional Composition of Shrimps Using Different Smoking Method". Asian Journal of Fisheries and Aquatic Research 24, n. 6 (24 agosto 2023): 17–27. http://dx.doi.org/10.9734/ajfar/2023/v24i6649.

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The study assessed the effects of smoking on the nutrient attributes of penaeus notialis shrimps in Ghana. Terminalia ivorensis, Petersianthus macrocarpus and Albizia zygia were used as fuel woods to smoolder the shrimps. Descriptive and experimental research designs were adopted to guide the entire study. A Random sampling technique was used to select 88 second year students of the Catering and Hospitality Department at the Kumasi Technical University. Frequency and percentage were used to analyse the background information of the respondents. One way Analysis of variance (ANOVA) was used to test for significant differences among the types of wood used. The study revealed that seven nutrients (Dry Matter, Moisture, Ash, Protein, Fibre, Fat/Oil and Carbohydrate) were found. There is a significant difference in nutritional and chemical properties of the shrimps based on the types of wood used for smoking. The study, therefore, recommended that, care must be taken not to use any wood for fuel in smoking shrimps.

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Bomba, Francis Desire Tatsinkou, Telesphore Benoit Nguelefack, Gangadhar Matharasala, Ram Kumar Mishra, Madhu Babu Battu, Dharmarajan Sriram, Albert Kamanyi e Perumal Yogeeswari. "Antihypernociceptive effects of Petersianthus macrocarpus stem bark on neuropathic pain induced by chronic constriction injury in rats". Inflammopharmacology 29, n. 4 (3 giugno 2021): 1241–53. http://dx.doi.org/10.1007/s10787-021-00821-y.

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Idaguko, Chika Anna, e Mayowa Jeremiah Adeniyi. "Indigenous Antidiabetic Medicinal Plants Used in Nigeria: A Review". Asian Plant Research Journal 11, n. 6 (7 dicembre 2023): 81–97. http://dx.doi.org/10.9734/aprj/2023/v11i6234.

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Diabetes mellitus is among the most prevalent endocrine disease that causes morbidity and mortality in Nigeria. Traditional medical system has been used for the both prevention and treatment of diabetes mellitus since ages. This paper reviewed the use of 35 Nigerian plants with putative anti-diabetic properties with the help of published literature. As per the International Union for Conservation of Nature (IUCN), status of these species include Sterculia tragacantha, Newbouldia laevis, Solanum anomalum, Ficus exasperate, Raffia palm (Raphia hookeri) Azadirachta indica, Syzygium cumini, Terminalia catapp, Solanum macrocarpon, Petersianthus macrocarpus, Xylopia aethiopica, Costus aferker-gawl, Spondias mombin, Eucalyptus globulus Parkia biglobosa, Persea americana, Anacardium occidentale, Vernonia amygdalina as least concern. While the status of Hunteria umbellate and Vitex doniana are reported as threatened and Dacryodes edulis and Dennettia tripetala as vulnerable species. However, the status of Annona muricata, Chrysophyllum albidum, Citrus paradisi Macfad, Aloe vera (Aloe barbadensis) are not evaluated. The following species like Phyllanthus amarus, Phyllanthus niruri and Telfairia occidentalis are data deficient. Most of the species belonging to common families like Solanaceae, Anacardiaceae, Euphorbiaceae, Annonaceae and Rutaceae. This review offers relevant information and recent scientific findings on the plants used to treat and manage diabetes in Nigeria. The cellular mechanisms through which these natural agents exert their protective and therapeutic effects on diabetes mellitus may include antioxidative stress, restricting the breakdown of glycogen, pancreatic β-cell regeneration, gluconeogenesis, anti-inflammatory and intracellular signals transduction pathways. This study concludes that indigenous medicinal herbs utilized in Nigeria have the potential to treat diabetes mellitus in Nigeria. Further studies are needed to discover potential drugs from these indigenous plants.

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Bomba, Francis Desire Tatsinkou, Bibiane Aimee Wandji, Basile Nganmegne Piegang, Maurice Ducret Awouafack, Dharmarajan Sriram, Perumal Yogeeswari, Albert Kamanyi e Telesphore Benoit Nguelefack. "Antinociceptive properties of the aqueous and methanol extracts of the stem bark of Petersianthus macrocarpus (P. Beauv.) Liben (Lecythidaceae) in mice". Journal of Ethnopharmacology 174 (novembre 2015): 66–73. http://dx.doi.org/10.1016/j.jep.2015.08.004.

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Più fonti

Tesi sul tema "Petersianthus Macrocarpus"

Ella, Nkogo Ley-Fleury. "Caractérisation des extractibles des bois de Petersianthus macrocarpus et Letestua durissima : une approche multicritère pour comprendre leur durabilité naturelle et explorer de nouvelles opportunités de valorisation". Electronic Thesis or Diss., Université de Lorraine, 2024. http://www.theses.fr/2024LORR0087.

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Cette étude s'est focalisée sur deux axes principaux : la caractérisation et l'étude des propriétés des substances extractibles de deux essences secondaires de la forêt gabonaise en vue d'une valorisation éventuelle, Letestua durissima et Petersianthus macrocarpus, ainsi que l'analyse des facteurs influençant la durabilité naturelle du bois. Les recherches ont débuté par des extractions successives par macération et au Soxhlet (utilisant le cyclohexane, le dichlorométhane, l'acétone, le mélange toluène/éthanol et l'eau) l'écorce, l'aubier et du duramen. Les résultats ont révélé des concentrations élevées de substances extractibles, notamment dans les écorces des deux essences, avec une analyse phytochimique mettant en évidence la présence de diverses familles chimiques telles que des composés phénoliques, des acides gras, des terpènes et des terpénoïdes. Les analyses infrarouges ont confirmé la présence de ces composés. De plus, l'utilisation de la GC-MS et de la LC-MS nous a permis d'identifier des composés tels que la catéchine, la gallocatéchine, l'acide gallique, la vanilline, etc. Les extraits ont démontré des propriétés antifongiques prometteuses contre les champignons de pourriture brune et blanche, ainsi qu'une activité antibactérienne, notamment contre Escherichia coli, avec les extraits de Letestua durissima se démarquant particulièrement. Les extraits ont également montré des propriétés anti-termites intéressent. Enfin, une étude plus large concernant l'étude de différents facteurs influençant la durabilité naturelle du bois a mis en évidence une forte corrélation entre des paramètres tels que la densité, le taux d'humidité, la mouillabilité, le taux d'extraits et le rapport sucre/lignine et la durabilité
This study focused on two main axes : the characterization and study of the properties of extractable substances from two secondary species of the Gabonese forest with a view to possible valorization, Letestua durissima and Petersianthus macrocarpus, as well as the analysis of the factors influencing the natural durability of wood. The research began with successive extractions by maceration and Soxhlet (using cyclohexane, dichloromethane, acetone, toluene/ethanol mixture and water) of the bark, sapwood and heartwood. The results revealed high concentrations of extractables, particularly in the barks of both species, with phytochemical analysis highlighting the presence of various chemical families such as phenolic compounds, fatty acids, terpenes and terpenoids. Infrared analyzes confirmed the presence of these compounds. Additionally, the use of GC-MS and LC-MS allowed us to identify compounds such as catechin, gallocatechin, gallic acid, vanillin, etc. promising against brown and white rot fungi, as well as antibacterial activity, particularly against Escherichia coli, with Letestua durissima extracts particularly standing out. The extracts also showed anti-termite properties. Finally, a broader study concerning the study of different factors influencing the natural durability of wood highlighted a strong correlation between parameters such as density, humidity rate, wettability, extract rate and sugar/lignin ratio and sustainability

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