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Parkia biglobosa (Mimosaceae) Leaves, Fruits’ Pulp, and Barks of Stem and Root Phytochemicals Contents and Their Antioxidant Activities

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Journal of Biosciences and Medicines 2022年第4期10卷 48-62页

作者： ange-Mariette Touré Tagouèlbè Tiho N’guessan Jean-Claude Yao Amissa Augustin Adima Department of Water Forests and Environment National Polytechnic Institute Félix Houphou&euml t Boigny Yamoussoukro C&ocirc te d’Ivoire Laboratory of Animal Science Department of Agriculture and Animal Resources National Polytechnic Institute Félix Houphou&euml t Boigny Yamoussoukro C&ocirc te d’Ivoire Laboratory of Industrial Processes Synthesis Environment and New Energies National Polytechnic Institute Félix Houphou&euml t Boigny Yamoussoukro C&ocirc te d’Ivoire

More and more Parkia biglobosa plants’ stem barks, and roots are collected for traditional medicine uses. This work aimed to quantify Parkia biglobosa plant parts total polyphenols, total flavonoids contents and their antioxidant activities. The hypothesis was that the plant parts would have different phytochemical contents. So, leaves, stem barks, root barks and mature fruit pulp were collected. Alongside the leaves, the stem and root barks were sliced, air-dried at room temperature for 30 days. Thereafter, the samples were crushed and sieved. Following this, the powders were extracted with distilled water by maceration and decoction. As a result, the decoction was more efficient than the maceration. Leaves had the highest total polyphenol content (14.68), followed by stem barks (11.69), and root barks (9.09 ± 0.43 mg GAe/g) (0.0001 ≤ p ≤ 0.0002). However, for total flavonoid contents, the stem barks were better than the other parts. Indeed, stem barks delivered 0.74 and were followed by leaves for 0.6, and root bark for 0.49 ± 0.02 mg eQ/g (0.0001 ≤ p ≤ 0.0169). Finally, the antioxidant activities were 3.07 and 2.86 ± 0.1 μmol T.e/g, respectively for stem bark, and leaves (p = 0.0532). In conclusion, there is no need to debark the stems, because, in decoction, leaves and stem barks would have the same efficacy.

关键词： Parkia biglobosa Total Polyphenols Total Flavonoids Antioxidant Activity

A pharmacologist's journey in medical education:a personal history

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Acta Pharmacologica Sinica 2004年第9期25卷 102-106页

作者： e e DANIeL AB T6G 2H7 Canada Department of Pharmacology Room 9-10 edmonton MSB University of Alberta

My journey as an educator in Pharmacology began in 1949, when, after finishing my MA in Biology at Johns Hopkins, Ⅰ decided that Ⅰ wanted to be involved in science with more relevance to humans. Ⅰhad been chasing f... 详细信息

关键词： ACe A pharmacologist’s journey in medical education

Validation of CFD-DeM model for iron ore reduction at particle level and parametric study

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Particuology 2020年第4期18卷 163-172页

作者： Dianyu e International Research Institute for Minerals Metallurgy and MaterialsJiangxi University of Science and TechnologyNanchang 330013China Department of Chemical engineering Monash UniversityClaytonVIC 3800Australia

Iron ore reduction is a primary unit operation in current metallurgy processes and dominates the energy consumption and greenhouse gas(GHG)emissions of the iron-making process,Therefore,even a slight improvement of the energy efficiency or GHG emissions of iron ore reduction would yield considerable benefits to the cost of pig iron and,more importantly,to mitigation of the associated carbon *** current study presents a discrete model that describes the iron ore reduction process for a single *** transient reaction progress can be predicted and is validated against experimental measurements under various operating conditions,including different reducing gases and *** effects of pressure,isothermality,gas composition,and flow rate on reduction are *** reduction rate increases significantly with increasing pressure until 5 atm,and the entire reduction process occurs more slowly under non-isothermal conditions than under isothermal *** work provides a solid foundation for the development of a comprehensive particulate system model that considers both heat and mass transfer.

关键词： Iron ore reduction Chemical reaction Blast furnace Discrete element method Computational fluid dynamics

Abundance and Diversity of Woody Undergrowth Reservoir as Indicator of Suitable Vegetation Patch for Natural Regeneration

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Open Journal of ecology 2022年第2期12卷 113-132页

作者： Saran Traoré Issiaka Keïta Sébastien ange Habih Nombré Hassan Bismarck Nacro Brice Sinsin UFR/de la Vie et de la Terre Université Nazi Boni Bobo-Dioulasso Burkina Faso Laboratoire d’etude et de Recherche en Fertilité de Sols IDR Université Nazi Boni Bobo-Dioulasso Burkina Faso Laboratoire de Biologie et ecologie Végétales UFR-Sciences de la Vie et de la Terre Université Joseph Ki-Zerbo Ouagadougou Burkina Faso Laboratoire d’ecologie Appliquée Faculté des Sciences Agronomiques Université d’Abomey-Calavi Cotonou République du Bénin

The diversity, abundance and height structure of naturally regenerated woody species were analyzed and compared for undergrowth reservoir associated with vegetation patches as bowal, shrubland and woodland for understanding the effect of vegetation conditions on spatial distribution of woody plants in Sudanian ecosystem. All undergrowth individuals (height ere recorded by species and the total height and collar diameter were measured in 50 subplots of 5 m × 5 m (or 25 m2) laid out in each vegetation patch during rainy season. In total 52 undergrowth species and 2224 stems arranged in 38 genera and 21 families out of which 25, 36 and 38 species were found in bowal, shrubland and woodland respectively and 15 shared species. Combretaceae, Caesalpiniaceae and Mimosaceae families were the most abundant and species density was significantly higher (P ease diversity in only shrubland (P = 0.002) comparing with bowal. Undergrowth was abundantly concentrated in small height class as canopy benefit and indicate a specific-site distribution. Results also showed that bowal had a particular vegetation which vary in function of tree community characters in place (P e woodland and shrubland are similar vegetation patches. As conclusion, the study vegetation patches form suitable regeneration niches for the undergrowth reservoir of limited number of species which in return can be predictor of species richness and abundance and thus the structure of tree community. Woody undergrowth community could be considered in biodiversity management and degraded land restoration. Supplementary works could be undertaken to understand the characteristics of seed bank for bowal, shrubland and woodland regarding the undergrowth and tree communities.

关键词： Biodiversity Conservation Burkina Faso Regeneration Spatial Heterogeneity Sudanian ecosystems

Can Stand Density and Stem Stratification Be Indicators of Aboveground Biomass in Woody Plant Recruitment in Savannah

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Open Journal of Forestry 2022年第1期12卷 41-59页

作者： Saran Traoré Sébastien ange Habih Nombré Issiaka Keïta Hassan Bismarck Nacro Brice Sinsin UFR/Sciences et Techniques Université Nazi Boni Bobo-Dioulasso Burkina Faso Laboratoire d’etude et de Recherche en Fertilité de Sols IDR Université Nazi Boni Bobo-Dioulasso Burkina Faso Laboratoire de Biologie et ecologie Végétales UFR Sciences de la Vie et de la Terre Université Joseph Ki-Zerbo Ouagadougou Burkina Faso Laboratoire d’ecologie Appliquée Faculté des Sciences Agronomiques Université d’Abomey-Calavi Cotonou République du Bénin

Stem density and size stratification of woody species are informative of vegetation conditions and its physiognomy in savannah whereas their variation influence woody population functioning. Current study endeavoured to evaluate the stand density and size variability of woody species related to aboveground biomass in a Sudanian savannah. Total height, stem diameter at breast height (dbh) ≥ 5 cm were measured in 30 plots of 50 m × 20 m laid in respect to vegetation type as bowal, shrubland and woodland. Species diversity, stem density, height and basal area were calculated and compared across sites and variation in stem dbh classes evaluated. Total aboveground biomass was estimated and thereafter linear relationships were established between stand density and aboveground biomass, and basal area. Results revealed three different sites with an overall 58 species identified through vegetation type including liana species (4 stems in bowal) with 18 genera and 42 families. Fabaceae Combretaceae, Anacardiaceae and Rubiaceae were dominant families. Small sized trees represented 72% of total stem density considered in structure with significant higher basal area, while large sized trees as 28% were scarcely distributed. More than 70% variation in biomass was due to stem density and basal area with a dominance of small trees. In conclusion increase size in tree community indicated increase in accumulated aboveground biomass as positive regeneration features. But, change in vegetation structure strongly influence negatively species ability to grow from lower to upper size class and later on, disrupt ecosystem functioning. Plant stem density and stratification could be con

关键词： Aboveground Biomass Biodiversity Conservation Plant Regeneration Stem Structure Vegetation Type

Spatial Organisation Influences Citrus <i>Pseudocercospora</i>Leaf and Fruit Spot Disease Severity in Cocoa-Based Agroforestry Systems

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American Journal of Plant Sciences 2019年第1期10卷 221-235页

作者： eunice Golda Danièle Ndo etienne Akoutou Mvondo Zachée Ambang Bella Manga Christian Cilas Lucien Bidzanga Nomo Cynthia Gidoin Marie-ange Ngo Bieng Institute of Agricultural Research for Development (IRAD) Regional Agricultural Research Centre of Nkolbisson Nkolbisson Cameroon Université de Yaoundé 1 Département de Biologie et Physiologie Végétale Yaoundé Cameroon CIRAD UPR Bioagresseurs Montpellier France UMR Agronomie INRA-AgroParisTech Thiverval-Grignon France CIRAD UMR SYSTEM Montpellier France CATIe Programa BOSQUES BIODIVERSIDAD YCAMBIO CLIMATICO Turrialba Costa Rica

An investigation to assess the spatial structure and severity of Pseudocercospora leaf and fruit spot disease (PLFSD) on citrus trees in cocoa-based agroforests was carried out in three contrasting ecological zones in southern Cameroon, viz: 1) the humid forest zone, 2) the degraded forest zone, and 3) the forest-savannah transition zone. Two main parameters were investigated viz: 1) the spatial structure of cocoa based agroforests, and 2) the disease severity. In total, the spatial structure of 19 cocoa-based agroforests was analysed using the Ripley K(r) function, meanwhile the collection of epidemiological data that consisted of noting the presence of PLFSD spots on leaves and fruits on 438 citrus trees was used to characterise the severity of the disease. Results showed that, the spatial structure of citrus trees in these agroforests investigated were regular in seven plots, random in nine, and aggregated in three. Aggregated plots presented a significantly higher mean of disease severity on leaves and fruits (28.55 and 30.37 respectively), as compared to randomised (20.91 and 16.32 respectively) and regular plots (16.28 and 14.97 respectively), at P-value ese results suggest that the spatial structure of citrus trees in the cocoa-based agroforests studied influences the severity of PFLSD. Proper integrated control measures can therefore be initiated, leading to a considerable reduction of the use of manufactured inputs, and thereby, the cost of production of citrus fruits.

关键词： Aggregated Spatial Structure Ripley Function Agroecological Management of Disease Pseudocercospora angolensis Cocoa-Based Agroforests Citrus

Thermal conductivity of systems with a gap in the phonon spectrum

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Chinese Physics B 2018年第7期27卷 424-430页

作者： e Salamatov Udmurt Federal Research Center Ural Branch of the Russian Academy of Sciences

An original theoretical model for describing the low-temperature thermal conductivity in systems with a region of forbidden values （a gap） in the phonon spectrum is proposed. The model is based on new experimental results on the temperature dependence of the phonon diffusion coefficient in nanoceramics and dielectric glasses which showed a similar anomalous behavior of the diffusion coefficient in these systems that may be described under the assumption of a gap in the phonon spectrum. In this paper, the role of the gap in low-temperature behavior of the thermal conductivity, ~＇（T）, is analyzed. The plateau in the temperature dependence of the thermal conductivity is shown to correlate with the position and the width of the gap. The temperature dependence of thermal conductivity of such systems when changing the scat- tering parameters related to various mechanisms is studied. It is found that the umklapp process （U-processes） involving low-frequency short-wavelength phonons below the gap forms the behavior of the temperature dependence of thermal con- ductivity in the plateau region. A comparison of the calculated and experimental results shows considerable possibilities of the model in describing the low-temperature thermal conductivity in glass-like systems.

关键词： phononic band gap phonon diffusion coefficient thermal conductivity glassy crystals

Impact of Surgical Treatment of Patella Tendon Rupture Regarding Return to Sports in Yaounde

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Open Journal of Orthopedics 2022年第5期12卷 225-235页

作者： Olivier K. Muluem Loic Fonkoue Ngo Yamben Marie-ange Sylvain N. Vofo Mohamadou e. Guemse Gael Dongmo Koufagued Kaldadak Daniel Handy Jean Bahebeck Faculty of Medicine and Biomedical Sciences University of Yaounde 1 Yaounde Cameroon Yaounde General Hospital Yaounde Cameroon National Centre for the Rehabilitation of Patients with Disabilities Yaounde Cameroon Yaounde Military Hospital YaoundeCameroon

Introduction: Patella tendon rupture (PTR) is a cause of handicap in athletic patients. Surgery remains the actual therapeutic modality with a variety of techniques that permits a return to sport. Our objective was to evaluate the return to sporting activities after surgical repair of a PTR. Method: We conducted a retrospective cohort study over five years from January 2016 to April 2021. We included athletes from 18 to 65 years of operating for a PTR. We evaluated: the knee functional score, the level of satisfaction, Lysholm score, VISA-P questionnaire, and return to sports. Results: A total of twenty-one cases of PTR were identified. The median age was 36 years (18 - 63). After surgery, the median follow-up was 17 months (12 - 55). All patients were able to walk at 3 months. A total of 17 patients (85%) returned to sports. The median return to sports was 6 months (5 - 11). Patients who return to a similar sport with a similar initial level of sporting activity were 45% (9 patients). The median time to return to sports for patients at a similar level of sport was 7.5 months (6 - 13). Functional scores were satisfactory;with a VISA-P score of 90/100 (25 - 100) and a Lysholm score of 98/100 (40 - 100). Conclusion: Surgical repair of PTR in athletes offers good results regarding return to sports in terms of proportion and timing whatsoever the technique. The use of protection band wires is reserved for patients with relative satisfaction during suture repair.

关键词： Athletes Return to Sport Patella Tendon Surgical Treatment Protection Band Wire

Magnetophotothermal interaction in a rotating solid cylinder of semiconductor silicone material with time dependent heat flow

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Applied Mathematics and Mechanics(english edition) 2021年第1期42卷 39-52页

作者： A.e.ABOUeLReGAL Department of Mathematics College of Science and ArtsJouf UniversityAl-Qurayyat 77423Saudi Arabia Department of Mathematics Faculty of ScienceMansoura UniversityMansoura 35516Egypt

A mathematical model linking thermoelasticity to photothermal experiments is proposed with the consideration of the photothermal *** system equations for coupled plasma,heat conduction with phase-lags(PLs),and motion equations are introduced and solved by using the Laplace transform *** photothermal,thermal,and elastic waves in a rotating solid cylinder of semiconductor material are analyzed with the proposed *** cylinder surface is constrained and subjected to a time-dependent pulse heat *** sensitivity of the physical fields for the angular velocity,PLs,and thermal vibration parameters is *** addition,the effects of the effective parameters on the physical quantities are graphically illustrated and discussed in detail.

关键词： photothermal phase-lag(PL) solid cylinder rotation semiconductor carrier concentration