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M S Sule - One of the best experts on this subject based on the ideXlab platform.
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toxicological study of aqueous methanol solvent fraction of methanol extract of Dacryodes edulis leaves
Toxicology reports, 2020Co-Authors: Chimaobi J Ononamadu, Adamu J Alhassan, Aminu A Ibrahim, A A Imam, Godwin O Ihegboro, Alowonle T Owolarafe, Obiajulu Christian Ezeigwe, M K Atiku, M S SuleAbstract:Abstract Dacryodes edulis (G. Don) H.J. Lam) is the most popular species under the genus Dacryodes. It is well known for its nutritional and ethno-medicinal uses in South-eastern and South-western Nigeria. This study was aimed to evaluate the toxicity of the aqueous-methanol fraction of crude methanol extract of Dacryodes edulis leaves (AMDE). The test rats were randomized to groups of single oral treatment of AMDE (10−5000 mg/kgbw) for the acute toxicity study. They were monitored for obvious signs of behavioural change and mortality. For the subacute toxicity study, the rats were randomized to three daily treatment groups (of 200, 400 and 600 mg/kgbw of AMDE) for 28 days. The fourth group (control) received 2.5 %v/v DMSO. At the end of the experiment, blood samples were collected for hematology and clinical chemistry evaluation. The histopathology of the livers and kidneys were assessed using the excised organs. The cytotoxicity and genotoxicity of AMDE were also evaluated using Allium cepa model. The result showed that acute administration of AMDE, up to a dose of 5000 mg/kgbw did not result in mortality of the test rats. The observed median lethal dose (LD50) was greater than 5000 mg/kgbw. The subacute oral administration of AMDE for 28 days showed no significant (p > 0.05) effect on liver function, kidney function indices, organ - body weight ratio, but significantly (p
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methanol extract fractions of Dacryodes edulis leaves ameliorate hyperglycemia and associated oxidative stress in streptozotocin induced diabetic wistar rats
Journal of Evidence-Based Integrative Medicine, 2019Co-Authors: Chimaobi J Ononamadu, Adamu J Alhassan, Aminu A Ibrahim, A A Imam, Godwin O Ihegboro, Tajudeen A Owolarafe, M S SuleAbstract:The present study evaluated the antidiabetic and antioxidant potential of the methanolic extract/solvent fractions of the leaves of Dacryodes edulis using a streptozotocin (STZ)-induced diabetic Al...
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Supplementary_Figures_R2 - Methanol-Extract/Fractions of Dacryodes edulis Leaves Ameliorate Hyperglycemia and Associated Oxidative Stress in Streptozotocin-Induced Diabetic Wistar Rats
2019Co-Authors: Chimaobi J Ononamadu, Adamu J Alhassan, A A Imam, Godwin O Ihegboro, Tajudeen A Owolarafe, Aminu Ibrahim, M S SuleAbstract:Supplementary_Figures_R2 for Methanol-Extract/Fractions of Dacryodes edulis Leaves Ameliorate Hyperglycemia and Associated Oxidative Stress in Streptozotocin-Induced Diabetic Wistar Rats by Chimaobi J. Ononamadu, Adamu J. Alhassan, Aminu Ibrahim, Abdullahi A. Imam, Godwin O. Ihegboro, Tajudeen A. Owolarafe and Mohammed S. Sule in Journal of Evidence-Based Integrative Medicine
Crepin Ella Missang - One of the best experts on this subject based on the ideXlab platform.
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relationship between texture and cell wall components of safou Dacryodes edulis g don h j lam fruits at different storage conditions
Journal of Applied Biosciences, 2018Co-Authors: Bayi Reine Dossou, Crepin Ella Missang, Simplice D Karou, Yaovi AmeyapohAbstract:Objective: The objective of this study was to determine the relationship between texture and cell wall component of safou (Dacryodes edulis (G Don) HJ Lam) at different storage conditions during the safou softening.Methodology and results: Using a General Linear Model (GLM), statgraphic software plus v. 5. 0 and XLstat 2007software, the relationship between texture and cell wall component of safou at different storage conditions was evaluated. At different stages of ripeness, safou were picked and stored in different conditions including: cultivar, picking mode, packaging mode and temperature. For each condition, texture, water loss, alcoholinsoluble CDTA- soluble pectins and neutral sugar level and methoxylation degree were measured.The results showed that the temperature and method of storage and theirs interaction influenced significantly the texture of the safou during storage. Softening and dehydration through transpiration are the two processes that changed the safou texture at high temperature (28°C and 36°C). The cultivar and the maturity stage also influenced significantly the texture. The correlation between texture and cell-wall component including alcohol insoluble solids, CDTA soluble pectin extracts, rhamnose and arabinose were very high. MIA (Materiel Insoluble in Alcohol) content increased and galacturonic acid content of CDTA Soluble Pectin extracts decreased, depending on the maturity level of safou: the degradation of homogalacturonans of pectins during the safou softening.Conclusion and application of results: the degradation of homogalacturonans of safou pectins had an impact on their texture. Therefore, for their postharvest shelf life, safou must be stored at low temperature (18°C) with or without packing.Keywords: Safou, texture, pectins, softening, Dacryodes edulis
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analysing fruit shape in safou Dacryodes edulis fruit by using aspect ratio
2013Co-Authors: Alain Serges Ondoazi, Crepin Ella Missang, Pamphile Nguema NAbstract:Fruit shape is one of the most important quality criteria for evaluation by customer preference. Aspect ratio (A.R.) was used as physical parameter to perform the choice of ratios for fruits shape determination. This study proposes a relationship between fruit shape and morphological parameters in bush butter fruits (Dacryodes edulis) collected on 35 bush butter trees. The results show that bush butter fruits present some shapes. To describe fruit shapes the use of morphological characteristics is possible. So, the unique parameter used in our study was A.R., width over length. All of 35 trees analyzed were regrouped in three types; those types were assimilated at shapes in bush butter fruit designated by elliptical, spheroidal and obovate shape. On fruit shapes, the analysis of variance shows that the mean values of aspect ratio are significantly different shape as shape. So, it indicates great distinction in the three fruit shapes presented. The distance calculus proposes also a bush butter categorization model based on A.R. A model to describe fruits source of the new trees is proposed.
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Ondo-Azi et al. Page 7
2013Co-Authors: Alain Serges Ondo-azi, Crepin Ella Missang, Pamphile Nguema NAbstract:Analysing fruit shape in safou (Dacryodes edulis) fruit by using aspect rati
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flavonols and anthocyanins of bush butter Dacryodes edulis g don h j lam fruit changes in their composition during ripening
Journal of Agricultural and Food Chemistry, 2003Co-Authors: Crepin Ella Missang, Sylvain Guyot, Catherine M G C RenardAbstract:Dacryodes edulis is a multipurpose tree presently undergoing domestication in central Africa and the countries bordering the Gulf of Guinea, the fruits of which are a good source of essential fatty acids. Polyphenols were characterized in the skin zone and in the pulp of bush butter [Dacryodes edulis (G. Don) H.J. Lam] fruits at different stages of ripeness, from unripe to soft fruits. Total polyphenols, assayed according to the Folin-Ciocalteu method, accounted for 3.0-4.2 mg/g of fresh skin, corresponding to 18.6-21.6 mg/g of defatted dry skin, higher concentrations than in the pulp, with 1.1-1.4 mg/g of fresh weight, corresponding to 5.4-12.3 mg/g of defatted dry weight. Reversed-phase high-performance liquid chromatography revealed the presence of flavonols and anthocyanins. Flavonols appeared to be the main class, with quercitrin as the main individual compound, and the highest concentrations occurred in the skin zone. Hyperin, isoquercitrin, isorhamnetin rhamnoside, and isorhamnetin hexoside were also present in relatively high amounts. Petunidin, cyanidin, and peonidin hexosides were identified by mass spectrometry. In the course of ripening, the total polyphenols as well as the major flavonols increased slightly between unripe and preripe stages and then declined gradually as ripening progressed. Anthocyanin profiles also showed a substantial change during ripening, concomitant with the color change from pink to purple.
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new developments in the chemical characterisation of the fruit of Dacryodes edulis g don h j lam
Forests trees and livelihoods, 2002Co-Authors: Dibungi T Kalenda, Crepin Ella Missang, Therese T Kinkela, Hans Christoph Krebs, Catherine M G C RenardAbstract:ABSTRACT One of the greatest constraints to increased commercialisation of safou, the fruit of Dacryodes edulis (G.Don) H.J. Lam, is its perishability. In this paper we report briefly on research in Gabon, which found that the pectins are the only class of polysaccharides involved in the safou softening process. We also report on studies into the chemical constituents of the pulp and seed oils which might provide alternative marketable products. In Congo-Brazzaville, High Performance Liquid Chromatography (HPLC) analysis of triacylglycerols (TAGs) identified two major TAGs in the seed oil (PPO>POO), and confirmed the five major TAGs in the pulp oil (PPO>POO>PPL >POL>PLL). In Kinshasa, three Thin Layer Chromatography (TLC) systems (for analysis of total lipids, TAGs and fatty acids) were proposed to allow for rapid identification of the safou oils and to detect eventual falsifications.
Chimaobi J Ononamadu - One of the best experts on this subject based on the ideXlab platform.
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toxicological study of aqueous methanol solvent fraction of methanol extract of Dacryodes edulis leaves
Toxicology reports, 2020Co-Authors: Chimaobi J Ononamadu, Adamu J Alhassan, Aminu A Ibrahim, A A Imam, Godwin O Ihegboro, Alowonle T Owolarafe, Obiajulu Christian Ezeigwe, M K Atiku, M S SuleAbstract:Abstract Dacryodes edulis (G. Don) H.J. Lam) is the most popular species under the genus Dacryodes. It is well known for its nutritional and ethno-medicinal uses in South-eastern and South-western Nigeria. This study was aimed to evaluate the toxicity of the aqueous-methanol fraction of crude methanol extract of Dacryodes edulis leaves (AMDE). The test rats were randomized to groups of single oral treatment of AMDE (10−5000 mg/kgbw) for the acute toxicity study. They were monitored for obvious signs of behavioural change and mortality. For the subacute toxicity study, the rats were randomized to three daily treatment groups (of 200, 400 and 600 mg/kgbw of AMDE) for 28 days. The fourth group (control) received 2.5 %v/v DMSO. At the end of the experiment, blood samples were collected for hematology and clinical chemistry evaluation. The histopathology of the livers and kidneys were assessed using the excised organs. The cytotoxicity and genotoxicity of AMDE were also evaluated using Allium cepa model. The result showed that acute administration of AMDE, up to a dose of 5000 mg/kgbw did not result in mortality of the test rats. The observed median lethal dose (LD50) was greater than 5000 mg/kgbw. The subacute oral administration of AMDE for 28 days showed no significant (p > 0.05) effect on liver function, kidney function indices, organ - body weight ratio, but significantly (p
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methanol extract fractions of Dacryodes edulis leaves ameliorate hyperglycemia and associated oxidative stress in streptozotocin induced diabetic wistar rats
Journal of Evidence-Based Integrative Medicine, 2019Co-Authors: Chimaobi J Ononamadu, Adamu J Alhassan, Aminu A Ibrahim, A A Imam, Godwin O Ihegboro, Tajudeen A Owolarafe, M S SuleAbstract:The present study evaluated the antidiabetic and antioxidant potential of the methanolic extract/solvent fractions of the leaves of Dacryodes edulis using a streptozotocin (STZ)-induced diabetic Al...
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Supplementary_Figures_R2 - Methanol-Extract/Fractions of Dacryodes edulis Leaves Ameliorate Hyperglycemia and Associated Oxidative Stress in Streptozotocin-Induced Diabetic Wistar Rats
2019Co-Authors: Chimaobi J Ononamadu, Adamu J Alhassan, A A Imam, Godwin O Ihegboro, Tajudeen A Owolarafe, Aminu Ibrahim, M S SuleAbstract:Supplementary_Figures_R2 for Methanol-Extract/Fractions of Dacryodes edulis Leaves Ameliorate Hyperglycemia and Associated Oxidative Stress in Streptozotocin-Induced Diabetic Wistar Rats by Chimaobi J. Ononamadu, Adamu J. Alhassan, Aminu Ibrahim, Abdullahi A. Imam, Godwin O. Ihegboro, Tajudeen A. Owolarafe and Mohammed S. Sule in Journal of Evidence-Based Integrative Medicine
Catherine M G C Renard - One of the best experts on this subject based on the ideXlab platform.
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flavonols and anthocyanins of bush butter Dacryodes edulis g don h j lam fruit changes in their composition during ripening
Journal of Agricultural and Food Chemistry, 2003Co-Authors: Crepin Ella Missang, Sylvain Guyot, Catherine M G C RenardAbstract:Dacryodes edulis is a multipurpose tree presently undergoing domestication in central Africa and the countries bordering the Gulf of Guinea, the fruits of which are a good source of essential fatty acids. Polyphenols were characterized in the skin zone and in the pulp of bush butter [Dacryodes edulis (G. Don) H.J. Lam] fruits at different stages of ripeness, from unripe to soft fruits. Total polyphenols, assayed according to the Folin-Ciocalteu method, accounted for 3.0-4.2 mg/g of fresh skin, corresponding to 18.6-21.6 mg/g of defatted dry skin, higher concentrations than in the pulp, with 1.1-1.4 mg/g of fresh weight, corresponding to 5.4-12.3 mg/g of defatted dry weight. Reversed-phase high-performance liquid chromatography revealed the presence of flavonols and anthocyanins. Flavonols appeared to be the main class, with quercitrin as the main individual compound, and the highest concentrations occurred in the skin zone. Hyperin, isoquercitrin, isorhamnetin rhamnoside, and isorhamnetin hexoside were also present in relatively high amounts. Petunidin, cyanidin, and peonidin hexosides were identified by mass spectrometry. In the course of ripening, the total polyphenols as well as the major flavonols increased slightly between unripe and preripe stages and then declined gradually as ripening progressed. Anthocyanin profiles also showed a substantial change during ripening, concomitant with the color change from pink to purple.
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new developments in the chemical characterisation of the fruit of Dacryodes edulis g don h j lam
Forests trees and livelihoods, 2002Co-Authors: Dibungi T Kalenda, Crepin Ella Missang, Therese T Kinkela, Hans Christoph Krebs, Catherine M G C RenardAbstract:ABSTRACT One of the greatest constraints to increased commercialisation of safou, the fruit of Dacryodes edulis (G.Don) H.J. Lam, is its perishability. In this paper we report briefly on research in Gabon, which found that the pectins are the only class of polysaccharides involved in the safou softening process. We also report on studies into the chemical constituents of the pulp and seed oils which might provide alternative marketable products. In Congo-Brazzaville, High Performance Liquid Chromatography (HPLC) analysis of triacylglycerols (TAGs) identified two major TAGs in the seed oil (PPO>POO), and confirmed the five major TAGs in the pulp oil (PPO>POO>PPL >POL>PLL). In Kinshasa, three Thin Layer Chromatography (TLC) systems (for analysis of total lipids, TAGs and fatty acids) were proposed to allow for rapid identification of the safou oils and to detect eventual falsifications.
Rn. Poligui - One of the best experts on this subject based on the ideXlab platform.
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etude de la diversite entomologique taxon famille des associations culturales prenant en compte le safoutier Dacryodes edulis g don h j lam burseraceae dans le haut ogooue gabon
Entomologie faunistique - Faunistic Entomology, 2014Co-Authors: Rn. Poligui, Isaac Mouaragadja, Eric Haubruge, Frederic FrancisAbstract:L’etude de l’entomofaune des associations culturales a ete conduite au Gabon en 2009 et 2010, au moyen des pieges jaunes et du controle visuel, dans la ville de Franceville et les villages environnants. L’etude revele l’existence des jardins de case a vegetation perenne et a vegetation mixte. Cinquante especes vegetales ont ete recensees, avec 48,1% des fruitiers, 23,5% des plantes alimentaires, et 29,4% des plantes spontanees. Dacryodes edulis est le fruitier predominant (21,2%). Les abondances des insectes pieges autour de D. edulis etaient plus elevees au niveau des jardins a vegetation perenne (13.550 insectes en 2009 et 5.196 insectes en 2010) que dans les jardins a vegetation mixte (8.203 insectes en 2009 et 3.537 insectes en 2010). Le controle visuel sur D. edulis a permis d’enregistrer des abondances assez equilibrees entre les deux types de jardins de case et chaque annee. Cependant, les indices de Shannon ne montrent pas de difference de diversite entomologique entre les jardins de case. Les especes dominantes des ravageurs comprennent Aphis spiraecola (Aphididae), Oligotropus sp. (Cecidomyiidae), Pseudonoorda edulis (Crambidae), Selenothrips rubrocinctus (Thripidae) et Stictococcus formicarius (Stictoccocidae). Les especes polinisatrices les plus abondantes sont Apis mellifera andansoni (Apidae) et Trigona braunsii (Apidae). Au regard de ces resultats, il ressort que l’exploitation des associations culturales autour du safoutier limiterait les pullulations des insectes et leurs degâts eventuels sur ce fruitier. Le developpement des etudes ulterieures dans cette voie pourrait conduire a des strategies de controle biologique des ravageurs de D. edulis au Gabon.
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Insect Pests Occurring on Dacryodes edulis (Burseraceae) in Rural Areas in Gabon
Neotropical Entomology, 2014Co-Authors: Rn. Poligui, I Mouaragadja, A Vandereycken, E Haubruge, F FrancisAbstract:The inventory of pests occurring on Dacryodes edulis (Burseraceae) was carried out in rural areas in Gabon during 2009 and 2010. Yellow traps and visual observations were used to record weekly pests during the tree flowering stage, in five villages. Catches from yellow traps rose to 7,296 and 1,722 insect pests in 2009 and 2010, respectively, whereas records from visual observations corresponded to 1,812 and 171 insect pests in 2009 and 2010, respectively. During both years, abundance from traps and visual monitoring was significantly different between sampling sites ( p 0.05) according to traps, but significant ( p ≤ 0.04) according to visual observations in 2010. Mecocorynus loripes Chevrolat (Coleoptera: Cucurlionidae) attacked the stem of D. edulis , while Oligotrophus sp. (Diptera: Cecidomyiidae), Pseudophacopteron serrifer Malenovsky and Burckhardt (Hemiptera: Phacopteronidae), and Selenothrips rubrocinctus Giard (Thysanopera: Thripidae) attacked leaves. Pseudonoorda edulis Maes and Poligui (Lepidoptera: Crambidae) and Lobesia aeolopa Meyrick (Lepidoptera: Tortricidae) infested fruits and inflorescences, respectively. These insects are specifically linked to plant patterns, and their identification provided the first basic information for developing suitable strategies to control pests of D. edulis in Gabon, as well as in neighboring central African countries.
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La culture du safoutier (Dacryodes edulis [G.Don] H.J.Lam [Burseraceae]) : enjeux et perspectives de valorisation au Gabon (synthèse bibliographique)
Presses Agronomiques de Gembloux, 2013Co-Authors: Rn. Poligui, Haubruge E., Francis F.Abstract:Cultivation of the African plum (Dacryodes edulis (G.Don) H.J.Lam): challenges and prospects for valorization in Gabon. A review. In Gabon, the African plum (Dacryodes edulis [G.Don] H.J.Lam) is an important fruit tree because of its nutritional value and its place within both the economy and the socio-cultural context. The fruits of this tree are widely appreciated and are sold regularly in all major urban markets. Local production is limited but is offset by significant imports from border countries. Culture of the African plum is widespread in anthropized areas, mainly in domestic gardens. The market and agronomic potential of this species has not yet been sufficiently studied in Gabon. There is no detailed study of the pests affecting D. edulis, or of their control. Numerous scientific studies carried out in neighboring countries have revealed excellent nutritional qualities of the safou pulp and interesting food properties of the oil extracted from both the safou pulp and the seed kernel. Within the context of sustainable development, the modernization of the culture of the African plum in Gabon, in particular by reducing pest-related losses and through the prudent use of all the products of the tree, may lead to important economic and industrial incomes
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la culture du safoutier Dacryodes edulis g don h j lam burseraceae enjeux et perspectives de valorisation au gabon synthese bibliographique
Biotechnologie Agronomie Société et Environnement, 2013Co-Authors: Rn. Poligui, Isaac Mouaragadja, Eric Haubruge, Frederic FrancisAbstract:Au Gabon, le safoutier (Dacryodes edulis [G.Don] H.J.Lam) est un arbre fruitier important de par sa valeur alimentaire, son role economique et sa place socio-culturelle. Ses fruits sont tres apprecies et regulierement commercialises sur les marches des grandes agglomerations urbaines. La production locale est limitee, mais suppleee par d’importantes importations en provenance des pays limitrophes. La culture du safoutier est repandue dans tous les milieux anthropises, principalement dans les jardins de case. Le marche et les potentialites agronomiques de cette espece n’ont pas encore ete etudies suffisamment au Gabon. Les recherches scientifiques effectuees dans les pays voisins ont revele d’excellentes qualites nutritionnelles de la pulpe du fruit et des proprietes agro-alimentaires interessantes des huiles extraites de la pulpe et du noyau du safou. Cependant, il n’existe aucune etude approfondie sur les ravageurs de D. edulis et leur controle. La modernisation de cette culture au Gabon, notamment en reduisant les pertes liees aux ravageurs et en valorisant tous les produits issus du safoutier, pourrait permettre d’envisager, dans le cadre d’un developpement durable, d’importantes retombees economiques et industrielles.
