检索结果-南通市图书馆

Wild Fruits Traditionally Gathered by the Malinke Ethnic Group in the Edge of Niokolo Koba Park (Senegal)

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2014年第9期5卷 1306-1317页

作者： Mathieu Gueye Nicolas Cyrille Ayessou Souleye Koma Seydina Diop Leonard Elie Akpo Papa Ibra Samb Department of Plant Biology Faculty of Science and Technology UCAD Dakar Senegal laboratoire de Formation Continue en Industries Agroalimentaires Ecole Supérieure Polytechnique Université Cheikh Anta Diop Dakar Senegal Laboratory of Botany Department of Botany and Geology UMI 3189 IFAN Ch. A. Diop Dakar Senegal

In rural areas, the local population draws from several forest resources needed for survival including food. Then it is a granary for these native people. Unfortunately, useful wild plants are highly threatened, especially by various human activities. Because of this situation we started with open semi-structured interviews to identify wild fruit plants, their consumed organs and their seasonality in the rural community of Tomboronkoto. Tomboronkoto is located at the edge of the Niokolo-Koba National park (Senegal) and is mainly inhabited by Malinke. We identified 45 wild fruit species belonging to 38 genera that can be divided in 28 botanical families. The more diversified are successively the Anacardiaceae, Tiliaceae, Apocynaceae and Caesalpiniaceae. More than half of the plants inventoried are trees (53%). We can distinguish three categories of fruits depending on their Fidelity Level (FL) that informs us about their popularity: the well-known or common fruits, moderately known fruits and little known fruits. A dozen wild fruits happen to be greatly appreciated with very high fidelity level (100% to 84%). The fruits of Saba senegalensis, Adansonia digitata, Parkia biglobosa, Tamarindus indica and Vitellaria paradoxa are the most variously used because they are appreciated being fresh or cooked. Only fruits of Ficussur are available all year long. The large majority of the most consumed fruits are available between the end of the hot dry season until the middle of the rainy season. This period coincides with the period where crops from the previous rainy season are depleted and the new crops are not yet ripe. Thus, these wild fruits would greatly contribute to food security in this area during the lean period.

关键词： Ethnobotany Traditional Knowledge Wild Edible Fruits Malinke Senegal

High-density single antibody electrochemical nanoarrays

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2023年第4期16卷 5412-5418页

作者： Khalil Chennit Yannick Coffinier Shuo Li Nicolas Clément Agnès Anne Arnaud Chovin Christophe Demaille UniversitéParis Cité CNRSLaboratoire d’Electrochimie MoléculaireParis F-75013France Institute of Electronics Microelectronics and NanotechnologyCNRSUniversity of LilleAvenue PoincaréBP60069Villeneuve d’Ascq 59652France IIS LIMMS/CNRS-IIS UMI2820The University of Tokyo4-6-1 KomabaMeguro-kuTokyo 153-8505Japan

The fabrication and electrochemical interrogation of very high density single-antibody nanoarrays is *** nanodots,15 nm in diameter,arranged in large(cm2)square arrays with a pitch of 200 nm,are used as carriers for primary antibodies(immunoglobulin G(IgG)),further recognized by secondary redox-labeled detection *** scale interrogation of the antibody array by cyclic voltammetry,and nanoscale interrogation of individual nanodots by mediator tethered atomic forcescanning electrochemical microscopy(Mt/AFM-SECM),enable the occupancy of nanodots by single antibody molecules to be *** involving the competitive adsorption of antibodies of different species onto the nanodots evidence the possibility of using single-antibody nanoarrays for digital electrochemical immunoassays.

关键词： single entity electrochemistry electrochemical digital immunoassays atomic force-scanning electrochemical microscopy(AFM-SECM)

Quassia undulata Oil Exploitation: Extraction’s Yield, Phytochemical Profile of Seeds and Oilcake Nutritional Value

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food and Nutrition Sciences 2022年第2期13卷 136-146页

作者： Ndiaye Seyni Ndiaye Bou Cissé Oumar Ibn Khatab Cissé Mady Gueye Mathieu Qi Zhang Ayessou Nicolas Cyrille Mensah Center for Studies on Food Safety and Functional Molecules (CESAM-RESCIF) ESP-UCAD Dakar Sénégal Oil Crops Research Institute of Chinese Academy of Agricultural Sciences (OCRI-CAAS) Wuhan China laboratoire umi 3189 Institut Fondamentale d’Afrique Noire (IFAN) Cheikh Anta Diop Département de Botanique et de Géologie Dakar Senegal

Quassia undulata is a plant that belongs to the Simaroubaceae family. In Africa, it occurs in the wooded savannah from Senegal in the west to the Central African Republic in the east. The seeds from the plant are very rich in oil. The traditional extraction of this oil involves a phase of boiling the powder from the seeds in a decoction of Piliostigma thonningii leaves. Thus, the aim of this study is to determine the impact of Piliostigma thonningii leaves on the extraction yield, to assess the phytochemical profile of seeds and oilcake and, to determine the nutritional value of the cakes obtained after extraction. Thus, the traditional extraction of oil was carried out in the laboratory and physico-chemical and phytochemical analyses were carried out on the water decoction, the oil and, the oilcake. The results showed that the traditional extraction gives a low extraction yield (5.18% with PD and 6.12% without PD) compared to the Soxhlet extraction (56.9%). On the other hand, it was found that oil obtained by traditional extraction in the presence of Piliostigma thonningii leaves was of better physicochemical quality. Finally, oilcake very rich in proteins (36.71% - 42.69%) and mineral elements (110.9 - 152.33 mg/100g of calcium, 544.75 - 620.77 mg/100g of Potassium and 331.11 - 459.68 mg/100g of Magnesium) justify their use in human food. However, investigations should point to the impact of this traditional technique on the elimination of quassinoids, toxins and antihelminth compounds present in the seeds.

关键词： Quassia undulata Piliostigma thonningii Oil Extraction Phytochemical

Traditional Pathway of Oil Extraction from Quassia undulateSeeds and Its Chemical Characteristic

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food and Nutrition Sciences 2021年第5期12卷 452-461页

作者： Ndiaye Seyni Gueye Mathieu Baldé Samba Ndiaye Bou Ayessou Nicolas Cyrille laboratoire Eau-Energie-Environnement et Procédésindustriels (LE3PI) ESP-UCAD Dakar Sénégal Center for Studies on Food Safety and Functional Molecules (CESAM-RESCIF) ESP-UCAD Dakar Sénégal laboratoire umi 3189 Bp206 Dakar Département de Botanique et de Géologie Institut Fondamental d’Afrique Noire (IFAN) Cheikh Anta Diop University Dakar Sénégal

In Africa, traditional vegetable oil extraction often involves the use of plants in the manufacturing process. Quassia undulate oil is thus traditionally prepared. An expedition went to Kédougo (a region in southeastern Senegal involving women of the Bassaris community) in June 2018 to study the Q. undulate oil traditional extraction mode. Thus, the objective of this study is to follow the traditional extraction of Q

Spirometric Abnormalities Met among Senegalese Workers Exposed to Chlorine Gas

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Pharmacy and Pharmacology 2019年第11期7卷 584-592页

作者： Houndjo Salimata Diagne Ouattara Rokia Mbengue Arame Ouedraogo Valentin Seck Aissatou Sow Abdou khadre Diaw Mor Toure Maimouna Coly Mame Saloum Ba Awa Sar Fatou Bintou Ba Abdoulaye Samb Abdoulaye laboratoire de Physiologie et d’Explorations Fonctionnelles Faculté de Médecine de Pharmacie et d’Odontologie-Senegal Universite Cheikh Anta Diop de Dakar Dakar BP 5005 Senegal umi 3189 “Environnement Sante Societies” CNRS CNRST Universite Bamako-UCAD Dakar BP 5005 Senegal UFR des sciences de la sante Thies BP 221 Senegal UFR des sciences de la sante Bambey BP 21400 Senegal

Introduction: Chlorine as a disinfectant has many side effects on respiratory function. This respiratory toxicity may be related to the exposure time. Materials and Methods: Measure the impact of the duration of chlorine gas exposure on the respiratory function of Senegalese workers who work in the national water production factory: Senegalaise Des Eaux (SDE), aged 35-54 years. Twenty-four (24) male subjects exposed to chlorine gas were divided into two groups, one (35-44) and the other (45-54). Clinical examinations were performed on each employee, followed by chest x-rays and spirometry. We included all subjects whose first or last two spirometry results were normal. Results: In the 35-44 years group, 50% of subjects had disturbed spirometry including 41.6% of obstructive syndrome (OS), at the second spirometry and 8.3% had a restrictive syndrome FVC at -25%, at the 3rd spirometry 4/12 had a normal spirometry. The duration of exposure was 10 years. For subjects in 45-54 years, 8/12 had persistent OS or accentuated, then at the 3rd spirometry we had 10 subjects. The duration of exposure was 17.5 years. Conclusion: Compared with (35-44) group, older (45-54) subjects had significant OS, which may be related to duration of exposure.

关键词： Spirometry exposure SDE

Electrically driven, phosphor-free, white light-emitting diodes using gallium nitride-based double concentric truncated pyramid structures

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2016年第1期5卷 665-670页

作者： Seung-Hyuk Lim Young-Ho Ko Christophe Rodriguez Su-Hyun Gong Yong-Hoon Cho Department of Physics and KI for the NanoCentury Korea Advanced Institute of Science and Technology291 Daehak-roYuseong-guDaejeon 34141Korea Electronics and Telecommunications Research Institute(ETRI) 218 Gajeong-roYuseong-guDaejeon 34129Korea The laboratoire Nanotechnologies Nanosystémes(LN2)-CNRS umi-3463 Institut Interdisciplinaire d’Innovation Technologique(3IT)Universitéde Sherbrooke3000 boulevard UniversitéJ1K 0A5QCCanada

White light-emitting diodes(LEDs)are becoming an alternative general light source,with huge energy savings compared to conventional ***,white LEDs using phosphor(s)suffer from unavoidable Stokes energy converting losses,higher manufacturing cost,and reduced thermal ***,we demonstrate electrically driven,phosphor-free,white LEDs based on three-dimensional gallium nitride structures with double concentric truncated hexagonal *** electroluminescence spectra are stable with varying *** origin of the emission wavelength is studied by cathodoluminescence and high-angle annular dark field scanning transmission electron microscopy *** variation of the carrier injection efficiency is also investigated by a comparative analysis between spatially resolved photoluminescence and electroluminescence.

关键词： indium gallium nitride light-emitting diodes phosphor-free three-dimensional structures white color

Characterization of meso-scale mechanical properties of Longmaxi shale using grid microindentation experiments

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2021年第3期13卷 555-567页

作者： Jianting Du Andrew J.Whittle Liming Hu Thibaut Divoux Jay N.Meegoda State Key Laboratory of Hydro-Science and Engineering Tsinghua UniversityBeijing100084China Department of Civil and Environmental Engineering Massachusetts Institute of TechnologyCambridgeMA02139USA MultiScale Material Science for Energy and Environment UMI 3466CNRS-MITCambridgeMA02139USA Univ Lyon Ens de LyonUniv Claude BernardCNRSLaboratoire de PhysiqueLyonF-69342France Department of Civil and Environmental Engineering New Jersey Institute of TechnologyNewarkNJ07102USA

Mechanical properties,such as the hardness H,Young’s modulus E,creep modulus C,and fracture toughness Kc,are essential parameters in the design of hydraulic fracturing systems for prospective shale gas *** this study,a practical methodology is presented for obtaining these properties through microindentation experiments combined with quantitative observations of the mineralogical phases using X-ray diffraction(XRD),scanning electron microscopy(SEM)with backscattered electron(BSE)imaging,and energy-dispersive X-ray spectroscopy(EDS)*** apply this method in the case of three types of Longmaxi shales with different mineralogies(***-,clay-,and quartz-rich,respectively),which allows us to determine the characteristic indentation depth,hc?8e10 mm,beyond which the mechanical response of the carbonate-rich shale is homogeneous and independent of its complex heterogeneous ***,exploiting the results of a large number of indentation tests,we demonstrate that the indentation modulus M of the shale increases as a power-law of hardness H,and its creep modulus C increases linearly with *** also compute the fracture toughness Kc from the indentation data by assuming a perfectly plastic behavior of the *** results are in good agreement with independent measurements of Kc determined by microscratch ***,further tests on quartz-and clay-rich samples of the Longmaxi shale suggest further variations in the samples’mechanical properties depending on their burial conditions and the mechanical properties of their dominant mineral phases.

关键词： Grid microindentation Mineral identification Hardness Modulus Creep Fracture toughness

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

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

聚苯胺衍生物膜修饰电极的电化学和催化性质

物理化学学报 2003年第6期19卷 564-568页

作者：许一婷戴李宗何云游 Tahina Rakotoartsoa Jean-Yves Gal 吴辉煌厦门大学化学化工学院固体表面物理化学国家重点实验室 UMR laboratoire Hydrosciences(CNRS UMIIRD)Maison des Sciences de l'Eau de MontpellierUniversité Montpellier Ⅱ34095 Montpellier Cedex 05France

采用聚-2,5-二甲氧基苯胺(PDMAn)、聚邻甲苯胺(POT)膜修饰电极,以异丙醇(i-P)氧化为模型反应,研究功能性膜电极的电催化性能.两种聚合物的伏安行为都表现为两对氧化还原峰;与镀铂的Pt电极比较,Pt金属化的PDMAn和POT修饰电极,大大提高了... 详细信息

采用聚-2,5-二甲氧基苯胺(PDMAn)、聚邻甲苯胺(POT)膜修饰电极,以异丙醇(i-P)氧化为模型反应,研究功能性膜电极的电催化性能.两种聚合物的伏安行为都表现为两对氧化还原峰;与镀铂的Pt电极比较,Pt金属化的PDMAn和POT修饰电极,大大提高了i-P氧化电流密度,而且随着循环次数增加,氧化电流不断增大,表明功能性膜修饰电极具有较高的催化活性.POT修饰电极在较低的铂含量下就表现出对i-P的强烈催化活性,而且对低浓度i-P的氧化,具有较高的响应灵敏度;此外POT还具有良好的环境稳定性,可望成为一种具有实际应用前景的电化学传感器.

关键词：聚苯胺衍生物膜修饰电极电化学催化性质聚-2,5-二甲氧基苯胺 PDMAn 聚邻甲苯胺 POT 异丙醇氧化