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Phytochemical Analysis and Antimicrobial Activity of Lawsonia inermis Leaf Extracts from Burkina Faso

American Journal of Plant Sciences 2024年第7期15卷 552-576页

作者： Ollo Youl Soumaïla Konaté Ernest N. Sombié Rainatou Boly Boukaré Kaboré moumouni koala Arouna Zoungrana Saybou Savadogo Christian Marc Tahita Innocent Valea Halidou Tinto Adama Hilou Maminata Traoré-Coulibaly Laboratoire de Biochimie et de Chimie Applique (LABIOCA) Universit de Ouagadougou Ouagadougou Burkina Faso Agence Nationale Pour la Scurit Sanitaire de lEnvironnement de lAlimentation du Travail et des Produits de Sant (ANSSEAT) Ouagadougou Burkina Faso Laboratoire de Recherche-Dveloppement de Phytomdicaments et Mdicaments (L-RD/PM) Institut de Recherche en Sciences de la Sant (IRSS-CNRST) Ouagadougou Burkina Faso Laboratoire de Chimie Organique et de Physique Applique (LCOPA) cole Doctorale Sciences et Technologie Universit Joseph KI-ZERBO Ouagadougou Burkina Faso Laboratoire Sciences de la Vie et de la Terre (LASVT) cole Doctorale Sciences et Technologie Universit Norbert ZONGO Koudougou Burkina Faso Unit de Recherche Clinique de Nanoro Institut de Recherche en Sciences de la Sant (IRSS-CNRST) Nanoro Burkina Faso

Lawsonia inermis is a hairless plant growing in various regions of North Africa, the Indian subcontinent, and the Middle East. It possesses many medicinal attributes, including curative properties against infectious dermatoses. This study was carried out to evaluate the phytochemical profile of the crude ethanolic extract of the plant leaves and its fractions as well as their antimicrobial activities. The phytochemical profile was performed using high-performance thin-layer chromatography (HPTLC), gas chromatography-mass spectrometry (GC-MS), and high-performance liquid chromatography (HPLC). Additionally, the phenolic and flavonoid contents were determined using the Folin-Ciocalteu spectrophotometric and the aluminum trichloride methods. Antimicrobial activity was tested using disc diffusion and microdilution methods. The presence of flavonoids, tannins, sterols, and triterpenes was revealed. GC-MS detected twelve compounds main compounds consisting of saturated and unsaturated fatty acids and phenolic and terpenoid compounds among twenty-seven components. HPLC also detected high contents of phenolic acids and flavonoids. The most abundant triterpene and sterols were ursolic acid (around 43.14 g/100g DW, 13.9 g/100g dry weight (DW), and 0.68 g/100g DW) in the crude ethanolic extract of leaves (FeLi), hexane fraction (FHLi) and dichloromethane fraction (FDLi), respectively and, β-sitosterol in FeLi (56.7 mg/100g DW), FHLi (10.55 g/100g DW), FDLi (106.1 mg/100g DW) and butanol fraction (FBLi) (357.4 mg/100g DW). Among the flavonoids, rutin = 3.24 g/100g and quercetin = 0.63 g/100g in the ethanolic extract, rutin = 15.73 g/100g in the dichloromethane fraction, and rutin = 0.23 g/100g) in the aqueous fraction;and among phenolic compounds, caffeic acid (37.65 g/100g DW) and vanillic acid (22.70 g/100g DW) were the most important in the ethyl acetate fraction (FAeLi). All organic fractions exhibited interesting antibacterial and antifungal activities against the tested s

关键词： Lawsonia inermis Phytochemical Profile HPLC GC-MS Analysis Antimicrobial Activity

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Antibacterial, Anti-Inflammatory and Antioxidant Activities of an ACAZY Herbal Formula Used in Traditional Medicine to Treat Respiratory Infections

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Natural Science 2024年第9期16卷 131-145页

作者： Mohamed Bonewendé Belemlilga Bagora Bayala Abdoul Gilchrist Laurent Boly Madinatou Annick Ouédraogo Alida Raissa Boina Boubacar Yaro Florentina Badea Camélia Diguti moumouni koala Denise P. Ilboudo Charles Bavouma Sombié Pascal Nadembega Jean-Marie Compaoré Paul Darga Mahoukèdè Théodora Zohoncon Moussa Ouédraogo Aristide Traore Noufou Ouédraogo Florentina Matei Rasmane Semdé Sylvin Ouédraogo Jacques Simporé Innocent Pierre Guissou Laboratoire de Recherche-Dveloppement de Phytomdicaments et Mdicaments (LR-D/PM) Institut de Recherche en Sciences de la Sant (IRSS) Centre National de la Recherche Scientifique et Technologique (CNRST) Ouagadougou Burkina Faso Centre de Recherche Biomolculaire Pietro Annigoni (CERBA) Ouagadougou Burkina Faso Laboratoire de Biologie Molculaire et de Gntique (LABIOGENE) Universit Joseph KI-ZERBO Ouagadougou Burkina Faso Ecole Normale Suprieure Koudougou Burkina Faso Laboratoire de Dveloppement du Mdicament (LADME) Centre de Formation de Recherche et dExpertises en Sciences du Mdicament (CEA-CFOREM) cole Doctorale Sciences de la Sant (ED2S) Universit Joseph KI-ZERBO Burkina Faso Laboratoire de Microbiologie Applique Universit des Sciences Agronomiques et de Mdecine Vtrinaire (UASMV) de Bucarest en Roumanie Bucharest Romania Dpartement de la mdecine traditionnelle Ministre de la Sant et de lHygine Publique Ouagadougou Burkina Faso Universit Saint Thomas dAquin (USTA) Ouagadougou Burkina Faso

ACAZY is a plant formula used in traditional medicine in Burkina Faso to treat respiratory infections. After phytochemical analysis, this study evaluated extracts’ anti-inflammatory, antioxidant and antibacterial properties from the ACAZY recipe. Three extractions, an aqueous macerate (AM), an aqueous decoction (AD) and an hydroethanolic macerate (HEM) of the ACAZY recipe powder were carried out. Phytochemical screening of the extracts was carried out using high-performance thin-layer chromatography (HPTLC) and the determination of phenolic compounds. The anti-inflammatory potential was assessed in vitro using pro-inflammatory enzyme inhibition tests. 2,2-Diphenyl-1-picrylhydrazyl (DPPH) and Ferric-reducing antioxidant power (FRAP) antioxidant properties were also determined. The antibacterial activity was evaluated on Staphylococcus aureus and Streptococcus pneumoniae strains. Phytochemical analysis revealed the presence of flavonoids, saponins, tannins, anthracenosids, sterols and triterpenes in the extracts. The extracts inhibited pro-inflammatory enzymes by more than 40% at only 100 µg/mL. The extracts also showed potent antibacterial activity with a minimum inhibitory concentration 1 mg/mL on Staphylococcus aureus and 2 mg/mL on Streptococcus pneumoniae. The extracts in the ACAZY formula have shown anti-inflammatory and antioxidant properties in vitro. The AD also showed an antibacterial activity. This justifies its use in traditional medicine to treat acute respiratory infections.

关键词： ACAZY Anti-Inflammatory Antioxidant Antibacterial In Vitro

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HPTLC Phytochemical Screening and Hydrophilic Antioxidant Activities of Apium graveolensL., Cleome gynandraL., and Hibiscus sabdariffaL. Used for Diabetes Management

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American Journal of Analytical Chemistry 2021年第1期12卷 15-28页

作者： moumouni koala Alphonsine Ramde-Tiendrebeogo Noufou Ouedraogo Sylvain Ilboudo Boukaré Kaboré Félix B. Kini Sylvin Ouedraogo Institut de Recherche en Sciences de la Santé Centre National de la Recherche Scientifique et Technologique (IRSS/CNRST) Ouagadougou Burkina Faso Laboratoire de Chimie Organique et Physique Appliquées (L.C.O.P.A.) Université Joseph KI-ZERBO UFR/SEA Département de Chimie Ouagadougou Burkina Faso Unité Mixte Internationale Environnement-Santé-Société (UMI 3189 ESS) CNRST/CNRS/UCAD/UGB/USTTB-P&ocirc le Burkina Ouagadougou Burkina Faso

Diabetes mellitus is a socially significant disease characterized by chronic hyperglycemia and metabolic disorders of proteins, carbohydrates, and lipids due to reduced function of insulin. Medicinal plants, rich in bioactive components that promote prevention and treatment, are inexpensive and no side effects. Apium graveolens, Cleome gynandra, and Hibiscus sabdariffa from Burkina Faso were investigated for their phytochemical profile and antioxidant activities. The high-performance thin-layer chromatography profile revealed flavonoids, tannins, and sterols in these herbaceous. The Hibiscus sabdariffa methanolic extract exhibited the highest total phenolic (138.4 ± 0.5 mg GAE/g DW) and flavonoid (52.8 ± 0.6 mg RuE/g DW) contents comparatively to Cleome gynandra and Apium graveolens. Hibiscus sabdariffa methanolic extract also presented the highest antioxidant activity (IC50 = 0.31 ± 0.002 mg/mL) using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging capacity assay. A high correlation between flavonoid contents and hydrophilic antioxidant activities (r = 0.99) was observed, indicating that flavonoids contribute significatively to these herbaceous antioxidant properties. Apium graveolens, Cleome gynandra, and Hibiscus sabdariffa constitute a natural source of phenolic compounds that could be exploited in diabetes mellitus management.

关键词： Diabetes Mellitus Medicinal Plants Flavonoids Contents Hydrophilic Antioxidant Activity HPTLC Screening

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Phytochemical Screening by High-Performance Thin-Layer Chromatography, Antioxidant Activities and Acute Toxicity of Trunk Barks Extracts of Lannea velutina A. Rich

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American Journal of Analytical Chemistry 2022年第10期13卷 365-381页

作者： Boukaré Kaboré moumouni koala Mathieu Nitiema Windingoudi Rimwagna Christian Ouedraogo Souleymane Compaoré Lazare Belemnaba Salfo Ouedraogo Sylvain Ilboudo Noufou Ouedraogo Constantin M. Dabiré Félix B. Kini Sylvin Ouedraogo Eloi Palé Laboratoire de Chimie Organique et de Physique Appliquée (LCOPA) école Doctorale Sciences et Technologie UniversitéJoseph KI-ZERBO Ouagadougou Burkina Faso Département Médecine-Pharmacopée Traditionnelles/Pharmacie (MEPHATRA/Ph) Institut de Recherche en Sciences de la Santé (IRSS/CNRST) Ouagadougou Burkina Faso International ResearchLoboratory-Environnement Santé Sociétés (IRL 3189 ESS) CNRST/CNRS/UCAD/UGB/USTTB Burkina Faso Laboratoire de Chimie et énergies Renouvelables Université Nazi BONI Bobo Burkina Faso

Lannea velutina is a traditional herbal remedy used to treat various diseases, including hypertension (HBP). Herbal medicines are affordable, and some have minimal side effects;they are rich in bioactive components that encourage prevention and treatment. This work uses appropriate experimental paradigms to investigate the phytochemical composition, antioxidant activity, and acute oral toxicity of L. velutina trunk bark extracted in water, methanol, ethyl acetate, dichloromethane, and hexane. According to a high-performance thin-layer chromatography profile, this shrub’s bark contains sterols, saponosides, flavonoids, and tannins. Compared to ethyl acetate and aqueous extracts, the methanol extract had the highest total phenolic (607.06 ± 0.6 mg GAE/g DW), flavonoid (20.97 ± 0.23 mg QE/g DW), and condensed tannins (194.50 ± 0.75 CE/g DW) content. The methanol extract displayed the highest antioxidant activity using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging capability assay (IC50 = 8.59 g/mL;AAI = 4.66) compared to the other extracts. It exhibited antiradical action comparable to that of Trolox (IC50 = 15.16 g/mL), ascorbic acid (IC50 = 11.94 g/mL), and catechin (IC50 = 11.64 g/mL). The connection between flavonoid concentration and hydrophilic antioxidant activity was robust (r = 0.997). Mice were used to evaluate the acute oral toxicity of ethyl acetate, methanol, and aqueous extracts using guidelines 425 of the Organization for Economic Cooperation and Development. All tested extracts have an estimated LD50 greater than 2000 mg/kg body weight. The truncal bark of L. velutina could be an alternative source for HTA management.

关键词： Lannea velutina Phytochemicals Proanthocyanidins Antioxidants LD50

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Anti-Inflammatory and Antioxidant Properties of the Aqueous Extracts of the Leaves of Opilia amentacea (Opiliaceae)

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Pharmacology & Pharmacy 2023年第9期14卷 329-347页

作者： Rainatou Boly Abdoul Gilchrist Laurent Boly Wendkouni Leila Marie Esther Belem-Kabré Kadiatou Tata Traoré Boukaré Kaboré Ollo Youl Latifatou Sawadogo Mathieu Nitièma moumouni koala Noufou Ouédraogo Estella Noëla Hoho Youl Maminata Traoré-Coulibaly Laboratoire de Recherche-Développement/Phytomédicaments et Médicaments (LR-D/PM) Institut de Recherche en Sciences de la Santé (IRSS) Centre National de la Recherche Scientifique et Technologique (CNRST) Ouagadougou Burkina Faso Ecole Doctorale Sciences et Technologie Laboratoire de Chimie Organique et Physique Appliquée (LCOPA) Université Joseph Ki-Zerbo Ouagadougou Burkina Faso Ecole Doctorale Sciences et Techniques Laboratoire de Biochimie et Chimie Appliquées (LABIOCA) Université Joseph Ki-Zerbo Ouagadougou Burkina Faso Ecole Doctorale Sciences de la Santé Laboratoire de Développement du Médicament (LADME) Centre de Formation de Recherche et d’Expertises en Sciences du Médicament (CEA-CFOREM) Université Joseph Ki-Zerbo Ouagadougou Burkina Faso

Opilia amentacea (Opiliaceae) is a woody plant with multiple medicinal claimed effects. The present study aimed to assess the anti-inflammatory and antioxidant activities of the decoction and macerate extracts from the leaves of Opilia amentacea. Moreover, acute toxicity and phytochemical analysis were performed. The acute toxicity was evaluated on NMRI mice at 2000 mg/kg bw. The anti-inflammatory activity was studied using the carrageenan-induced mouse paw edema and the lipoxygenase inhibition assay. The radical scavenging (DPPH and ABTS), ferric-reducing antioxidant power (FRAP), and lipid peroxidation (LPO) assays were used to measure the antioxidant capacity of the extracts. Qualitative and quantitative methods served for identifying and quantifying the extract’s phytoconstituents. The decoction demonstrated low acute toxicity;the lethal dose was therefore estimated to be superior to 2000 mg/kg bw. The extracts significantly reduced the mouse paw’s thickness at 600 mg/kg bw. The extracts developed weak radical scavenging and lipid peroxidation inhibitory effects. However, the macerate showed a high ability (664.90 ± 0.71 mol Ascorbic Acid Equivalent/g dry extract) to reduce the ferric ions. Saponins, sterols, triterpenes, and flavonoids were qualitatively detected in the two extracts. Total phenolics (TP) and total flavonoids (TF) were found abundant in the extracts, especially the decoction (TP content (TPC) = 94.03 ± 2.66 mg GAE/g;TF content (TFC) = 35.05 ± 0.32 mg QE/g). Strong positive correlations existed between ferric-reducing capacity and TPC (r = 0.959) for the macerate, while TFC was mainly involved in the DPPH radical scavenging of the two extracts. Instead, most correlations were negative between the polyphenol compounds and the anti-inflammatory assays. The results indicate potent in vivo anti-inflammatory and in vitro antioxidant effects of the aqueous extracts from the leaves of Opilia amentacea. Further studies are needed to find the anti-inflamm

关键词： Opilia amentacea Aqueous Extracts Acute Toxicity Anti-Inflammatory Antioxidant

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Phytochemical Analysis and Contractile Effects of Aqueous and Hydroethanolic Extracts of Anastatica hierochuntica L. (Brassicaceae) on the Isolated Uterus of Mice

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Pharmacology & Pharmacy 2023年第8期14卷 252-270页

作者： Belem-Kabré Wendkouni Leila Marie Esther Nitiéma Mathieu Odjo Blondine Saïdath Maman Noura Oumarou Yaro Boubacar Kaboré Boukaré Somda Gaëtan Donzéo Traoré Tata Kadiatou koala moumouni Ilboudo Sylvain Ouédraogo Moussa Kabré Elie Ouédraogo Noufou Laboratoire de Recherche-Développement de Phytomédicaments et Médicaments (LR-D/PM) Institut de Recherche en Sciences de la Santé (IRSS/CNRST) Ouagadougou Burkina Faso Laboratoire du Développement du Médicament (LADME)/Centre de Formation de Recherche et d’Expertises en Sciences du Médicament (CEA-CFOREM) Université Joseph KI-ZERBO Ouagadougou Burkina Faso Laboratoire de Chimie Organique et de Physique Appliquée (LCOPA) Université Joseph KI-ZERBO Ouagadougou Burkina Faso Agence Nationale pour la Sécurité Sanitaire de l’Environnement de l’Alimentation du Travail et des Produits de Santé (ANSSEAT) Ouagadougou Burkina Faso

Background: Anastatica hierochuntica L. (Brassicaceae) has been claimed to treat various conditions, including complicated childbirth. The principal objective of this research was to provide scientific evidence on the contractile effect of the aqueous and hydroethanolic extracts of the whole plant from A. hierochuntica during labor. Method: Qualitative and quantitative methods helped identify and quantify the phytoconstituents in both extracts. The antioxidant activity was studied using four standard methods (ABTS, DPPH, FRAP, and LPO). Results: The inhibitory power of the extracts on pro-inflammatory enzymes such as 15-lipoxygenase and phospholipase A2 was determined. The contractile effects of the extracts were evaluated using isolated pregnant mice uteri. Steroids, triterpenoids, flavonoids, tannins, coumarins, and reduced compounds were identified in both extracts. The hydroethanolic extract exhibited higher content of hydrolyzable tannins (15.07 ± 0.24 mg tannic acid equivalent/g) than the aqueous decoction (11.8 ± 0.69 mg TAE/g). The extracts demonstrated the ability to scavenge DPPH and ABTS radicals, reduce ferric ions, and inhibit especially lipid peroxidation. No significant difference was noted in the phospholipase inhibition between the extracts and betamethasone. The hydroethanolic extract displayed the most significant anti-lipoxygenase activity with an IC50 value of 55.82 ± 1.15 μg/mL. The lethal dose (LD50) of extracts was estimated to be superior to 2000 mg/kg body weight (bw). The ability of the samples to produce one cm amplitude of contraction at 50% effective concentrations (EC50) was 5.33 × 10−8 ± 0.32 mg/mL for oxytocin, 1.51 ± 0.08 mg/mL for aqueous extract and 3.57 ± 0.61 mg/mL for hydroethanolic extract. Conclusion: These findings could provide evidence for using Anastatica hierochuntica to facilitate childbirth.

关键词： Anastatica hierochuntica Phytoconstituents Antioxidant Anti-Inflammatory Uterine Contractility

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Phytochemical Profile, Antioxidant, and Anti-Inflammatory Activities, Safety of Use and Spasmolytic Effects of Aqueous Decoction Extract of Diospyros mespiliformis Leaves Hochst. ex A. DC. (Ebenaceae) on the Isolated Duodenum of Rat

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Pharmacology & Pharmacy 2023年第12期14卷 513-529页

作者： Mathieu Nitiéma Pegdwendé Esther Ouédraogo Tata Kadiatou Traoré Oumarou Maman Noura Boukaré Kaboré Wendkouni Leila Marie Esther Bélem-Kabré Windingoudi Rimwagna Christian Ouédraogo moumouni koala Bruno Nébié Abdel Magid Arsène Ouoba Makumbu Joseph Makaya Sylvain Ilboudo Lazare Belemnaba Noufou Ouédraogo Sylvin Ouédraogo Laboratoire de Recherche-Développement des Phytomédicaments et Médicaments (LR-D/PM) Institut de Recherche en Sciences de la Santé/Centre National de la Recherche Scientifique et Technologique (IRSS/CNRST) Ouagadougou Burkina Faso Initiative Pour la Résilience et la Gouvernance (IRG) Ouagadougou Burkina Faso International Research Laboratory 3189 Environnement Santé Sociétés (IRL 3189 ESS) Centre National de la Recherche Scientifique et Technologique (CNRST) Ouagadougou Burkina Faso UFR/Science et Technologie Université Aube Nouvelle Ouagadougou Burkina Faso Laboratoire du Développement du Médicament (LADME) école Doctorale Sciences et Santé Université Joseph KI-ZERBO Ouagadougou Burkina Faso Ecole Doctorale Sciences et Techniques Laboratoire de Biochimie et Chimie Appliquées (LABIOCA) Université Joseph KI-ZERBO Ouagadougou Burkina Faso

Diospyros mespiliformis Hochst. ex A. DC. (Ebenaceae) is a multi-use plant, including for therapeutic purposes. It is used in alternative medicine in Burkina Faso to treat conjunctivitis, menorrhagia, dysentery, and diarrhea. The aim of our study was to evaluate the chemical profile, antioxidant and anti-inflammatory activities, safety of use and spasmolytic effects of the aqueous decoction of Diospyros mespiliformis leaves. Phytochemical screening by HPTLC and assay of compounds of interest were carried out. Four methods were used to assess antioxidant activity. Inhibitory activity against 15-lipoxygenase and phospholipase A2 was assessed. Acute oral toxicity of the extract was tested on female mice (NMRI). Following these tests, the extract contained bioactive compounds of interest such as flavonoids, tannins, sterols, triterpenes, and saponosides. The total phenolic and flavonoid contents of the aqueous decoctate were 70.59 ± 3.20 mg EAT/g and 31.57 ± 0.78 mg EQ/g respectively. The extract was less active than Trolox with inhibitory concentrations of 50% (IC50) for the ABTS, DPPH, FRAP, and LPO tests of 7.53 ± 0.08 μg/mL, 29.47 ± 0.06 μg/mL, 1128.83 ± 4.82 mol EAA/g, and 32.30 ± 1.60 μg/mL respectively. The extract has an anti-inflammatory effect with inhibition of phospholipase A2 compared to betamethasone. In addition, the aqueous extract produced an antispasmodic effect with Emax of 70% and 80% respectively during contractions induced by BaCl2 and ACh. Finally, this study provided basic scientific data and could justify the use of D. mespiliformis leaves in the treatment of diarrhea.

关键词： Diospyros mespiliformis Phytoconstituents Antioxidants Acute Oral Toxicity Spasmolytic Leaves

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The Playful Giant Pandas

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China Book International 2023年第3期 16-19页

作者： koala Can 不详

Wild giant pandas are not afraid of people but always take an evasive approach when encountering other *** pandas spend a lot of time with humans and are more gentle in *** up,a giant panda is nearly as tall as an adult.

关键词： species. Wild gentle

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Seasonal Variations of Solar Wind Parameters during Solar Cycles 23 and 24

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Open Journal of Applied Sciences 2022年第9期12卷 1527-1546页

作者： Somaïla koala Yacouba Sawadogo Jean Louis Zerbo Laboratoire de Matériaux d’Héliophysique et Environnement (La.M.H.E) ED/ST Université Nazi BONI Bobo-Dioulasso Burkina Faso Unité de Formation et de Recherche en Sciences Exactes et Appliquées (UFR/SEA) Université Nazi BONI Bobo-Dioulasso Burkina Faso

In this paper, we analyzed diurnal and annual seasonal variations of solar wind parameters such as interplanetary magnetic field (IMF), proton density (N), solar wind speed (V) and solar wind dynamic pressure (Pdym), during the solar cycles 23 and 24. Our study shows that strong geomagnetic disturbances are observed at the equinoxes during both solar cycles. The highest proton densities are observed at solstices during both solar cycles. The greatest solar wind speeds are observed at the equinoxes of solar cycle 23 and at the solstices of solar cycle 24. The highest solar wind dynamic pressures are observed at the solstices of both solar cycles. We also observed an asymmetrical evolution of the seasonal diurnal values of the solar wind parameters during the two cycles, except for the proton density. Our investigations also highlight the fact that the seasonal diurnal values of the solar wind parameters are significant at solar cycle 23 compared to solar cycle 24 characterized by a global weak in solar plasma conditions since the deep minimum that followed the solar cycle 23 leading to an absence of a persistent polar coronal hole. The drop observed in polar field and solar winds parameters during solar cycle 24 is reproduced on seasons (solstices and equinoxes). The solar cycle 23 and 24 appear to be two magnetically opposite solar cycles regardless the time scales.

关键词： Diurnal Seasonal Solar Winds Parameters Variation Solar Cycle

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Rainfall and Temperature Variations over Burkina Faso: Possible Influence of Geomagnetic Activity, Solar Activity and Associated Energies from 1975 to 2020

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Atmospheric and Climate Sciences 2022年第4期12卷 603-612页

作者： Yacouba Sawadogo Somaïla koala Jean Louis Zerbo Laboratoire de Matériaux d’Héliophysique et Environnement (La.M.H.E) Université Nazi Boni Bobo-Dioulasso Burkina Faso Unité de Formation et de Recherche en Sciences Exactes et Appliquées (UFR/SEA) Université Nazi Boni Bobo-Dioulasso Burkina Faso

This study investigates climatic parameters (rainfall, and temperature) over Burkina Faso and the possible role of solar activity and its induced energies. Through morphological investigations, we analyzed solar activity indices (sunspot number, IMF, PC index, Cosmic rays) over the last three solar cycles (1975-2020). Results about interplanetary heating show that joule heating is well correlated with the dynamic pressure of the solar plasma. Climate parameters (rainfall, Temperature) variabilities are modulated by disturbances in solar activity: 1) quiet solar characterized by a drop in solar plasma’s parameters is associated with important cloud cover and consequently bring important rainfall which chills terrestrial atmosphere, 2) active solar characterized by important input energy is associated with weak incident cosmic ray consequently with low cloudiness which brings warming. Thus, the possible natural link can be suggested between solar activity and climatic parameters even if it is not the only factor of global warming.

关键词： Temperature Rainfall Solar Activity Geomagnetic Activity Climate Burkina Faso

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