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Pneumatosis Cystoides Intestinalis Revealed by an Occlusive Syndrome: A Case Report

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Open Journal of Pathology 2023年第4期13卷 210-216页

作者： Franck Auguste Hermann Adémayali Ido Aimé Sosthène ouédraogo Ibrahim Savadogo Rakiswendé Alexis ouédraogo Souleymane ouattara Assita Lamien-Sanou Olga Mélanie Lompo Department of Anatomy and Pathological Cytology CHU Tengandogo Ouagadougou Burkina Faso Department of Anatomy and Pathological Cytology CHU Bogododgo Ouagadougou Burkina Faso Department of Anatomy and Pathological Cytology CHU-R of Ouahigouya Ouahigouya Burkina Faso Histo-Embryo-Cytogenetics Department Bogododgo University Hospital Ouagadougou Burkina Faso Department of Anatomy and Pathological Cytology CHU Yalgado Ouédraogo Ouagadougou Burkina Faso

Introduction: Pneumatosis cystoides intestinalis is a rare condition characterized by the presence of gas cysts in the intestinal wall. It can affect different segments of the digestive tract. Male patients over 50 years old seem to be more affected. Classically, one opposes the primary or idiopathic forms and the secondary forms. Case Report: We report the case of a 62-year-old female patient with a history of treated peptic ulcers, who presented with episodes of intermittent atypical abdominal pain that worsened abruptly. The physical examination revealed a surgical abdomen with tenderness to palpation. The patient underwent a jejunal resection. The pathological examination showed macroscopically an intestinal fragment with confluent subserosal and intestinal intraparietal bullae. On opening, the portion containing the bullae was thickened, infarcted, congestive, hemorrhagic, and brittle with narrowing of the intestinal lumen. The bullae are tense and leave serosities. On histological examination, the intestinal wall was very congestive with hemorrhagic patches of suffusion. There were optically empty cystic formations that do not communicate with the digestive lumen. The adjacent mucosa is the site of a moderate subacute inflammatory reaction. Conclusion: Pneumatosis cystoides intestinalis is a rare and usually benign pathology. The symptoms, when they exist, are not specific. Its physiopathology is still very much debated. The prognosis is generally good. The knowledge of this pathology is necessary to avoid invasive explorations and heavy treatment without interest for the patient.

关键词： Cysts Gas Intestinal Pathology

Alteration Typology and Geochemical Signatures of the Napélépéra Gold-Bearing Granodiorite in South-West Burkina Faso (West Africa)

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Open Journal of Geology 2023年第10期13卷 1162-1175页

作者： Théophile ouédraogo Sâga Sawadogo Hermann Ilboudo Séta Naba Laboratoire Géosciences et Environnement (LaGE) Département des Sciences de la Terre Université Joseph KI-ZERBO Ouagadougou Burkina Faso

The characterization of the relationships between mineralization and hydrothermal alteration is an essential element in understanding gold deposits. In south-west Burkina Faso, the Napélépéra mineralisation, the mobility of chemical elements and alteration-mineralization relationships were studied by means of selected core drilling and geochemical analyses using ICP-MS (Inductively Coupled Plasma Mass Spectrometry) and ICP-AES (Inductively coupled plasma atomic emission spectroscopy). The mineralised granodiorite is grey porphyroid with quartz, plagioclase, biotite and amphibole. It is metaluminous and located in the tholeiitic series. The Na2O + CaO versus Fe2O3 + MgO alteration diagram divides the samples according to alteration dominance. Chloritisation and carbonation are the main alterations. There is a relationship between gold mineralisation at Napélépéra and alteration, and the paragenesis of gold + pyrite ± carbonate ± silica ± sericite is the main characteristic. Carbonation is the result of fluid input in the shear corridor of the mineralised zone. The mass balance of comparative metals in the proximal and distal zones of the mineralisation shows the absence of metals, while As, Hg, Ag and Bi are strongly enriched from the distal zone to the mineralised zone. The oxides associated with the mineralisation are mainly NaO, SrO and CaO.

关键词： Gold Mineralization Alteration Mass Balance Granodiorite

DFT calculation analysis of oxygen reduction activity and stability of bimetallic catalysts with Pt-segregated surface

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Science China Chemistry 2015年第4期58卷 586-592页

作者： Lihui ou Shengli Chen College of Chemistry and Molecular Sciences Wuhan University College of Chemistry and Chemical Engineering Hunan University of Arts and Science

The stability and oxygen reduction reaction （ORR） activity of the Pt-segregated surface in various Pt-M alloys （M： transition metals） are investigated through systematic DFT calculations on the thermodynamic （alloy formation energy and Pt surface segregation energy）, surface chemical property （oxygen binding energy） and electronic （d-band center） properties. Factors af- fecting these properties, such as the atomic radii and surface energy of M and the electronic ligand interaction between Pt and M are analyzed as a function of outmost d electron numbers of M. It is shown that the electronic ligand interaction plays de- termining role in the alloy formation energy of various Pt-M alloys; the formation of Pt-segregated surface in Pt-M alloys is faw）red when alloying metals have higher surface energy and smaller radii than Pt; the oxygen binding energy on the Pt-segregated surface in Pt-M alloys varies approximately linearly with the d-band center of surface Pt atoms; the lattice strain and electronic ligand effects are simply additive in Pt-M alloys; the stain effect in Pt-M alloys nearly linearly affects the d-band center of the Pt-segregated surface in Pt-M alloys; transition metals with less than 10 d electrons mostly exhibit electron ligand effects which result in downshift of the d-band center of the segregated surface Pt atoms, while those with ten d electrons exhibit electron ligand effect upshifting the d-band center of the segregated Pt atoms.

关键词： oxygen reduction reaction bimetallic catalysts Pt-segregated surface DFT calculation

Water Dynamics Combined with a Supply of NPK Solutes and Urea in a 3-Layer Soil Profile under Drip Irrigation

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Agricultural Sciences 2021年第11期12卷 1321-1341页

作者： Siguibnoma Kévin Landry ouédraogo Marcel Bawindsom Kébré François Zougmoré Laboratoire de Matériaux et Environnement UFR/ST Université Joseph KI-ZERBO Ouagadougou Burkina Faso

The intensive and inappropriate use of water, fertilizers and phytosanitary products is sources of water and soil pollution. It is thus necessary to improve the management of irrigation water in order to optimize its use and productivity, especially in regions where water resources are becoming increasingly scarce. The water flow and non-reactive solutes’ transport simulation under drip irrigation were carried out in a 3-layered soil profile distributed from top to bottom i.e., sandy, sandy-silty, silty-sandy-clay. The aim of this study was thus, to provide a good practice of water management associated with solutes’ application, in order to retain as much solute as possible in the root zone, which will increase the residence time of the solutes. Three treatments of water flux corresponding to 100% ETc, 75% ETc, 50% ETc, combined with 100 mmol /L/ m2 of NPK and 246 mmol/L/m2 of urea applicable in two doses, were carried out over a period of 110 days corresponding to the duration of the cropping cycle for the intermediate variety of maize. The 100% ETc and 75% ETc treatments cause more loss of water and solutes, because of the sandy texture of the soil. However, a 50% ETc water flux would reduce more water loss through drainage, and solutes’ loss due to leaching beyond the root zone, which would increase the residence time of solutes in the soil profile. Application tests of the NPK solute on different days before the 15th day after sowing were also carried out according to the technical itinerary for maize production in Burkina Faso, in order to find a favorable day for application of the solute. For the different dates of solute’s application, there was more loss of the solute as we approach the 15th day after sowing. To limit this loss and i

关键词： Drip Irrigation Hydrus 1D Solute and Water Management Residence Time

Effects of aspect ratio on shock-cylinder interaction

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Acta Mechanica Sinica 2019年第1期35卷 61-69,I0003页

作者： Junfeng ou Zhigang Zhai Department of Modem Mechanics University of Science and Technology of ChinaHefei 230026China

Interaction of a planar shock wave with a discontinuous SF& elliptic gas cylinder surrounded by air is investigated. Special attention is given to the effects of aspect ratio on wave pattern, interface evolution, and material mixing. An ideal discontinuous two-dimensional gas cylinder is created by the soap film technique in experiments, and the shocked flow is captured by schlieren photography combined with a high-speed video camera. The surface of the gas cylinder is clear enough to observe the shock motions, and the distinct interface boundaries allow us to extract more details. As aspect ratio varies, the shock focusing process is quite different. For the prolate gas cylinder, an inward jet is produced although an internal shock focusing firstly occurs. The inward jet has never been observed in membraneless prolate ellipse experiments probably because the inward jet is so faint due to less vorticity generation on membraneless interface that it is difficult to be observed. For the oblate gas cylinder, a secondary vortex pair, which has not been described clearly in previous work, is derived from the downstream interface. The material lines at early stages are extracted from experiments, which grow faster as aspect ratio increases. The in terfacial area, the mean volume fraction and the mixing rate are presented from computations, and the results show that the increase of aspect ratio promotes the mixing between gases.

关键词： Shock-cylinder interaction Jet Aspect ratio

Seed Potential of Ruminants Organic Manures in Sahelian Agro-Pastoral Systems

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Agricultural Sciences 2022年第11期13卷 1186-1207页

作者： Pauline ouédraogo Mohamed Cissé Philippe Bayen Salifou Traoré Babou André Bationo Training and Research Unit of Life and Earth Sciences University Joseph Ki-Zerbo Ouagadougou Burkina Faso Banfora University Center University Nazi Boni Bobo-Dioulasso Burkina Faso Training and Research Unit of Applied Sciences and Technologies University of Dédougou Dédougou Burkina Faso Environmental and Forests Department Institute of Environment and Agricultural Research Ouagadougou Burkina Faso

In degraded Sahelian agro-systems, livestock manures increase agricultural production and ensure natural regeneration through their selective seed potential. Yet, this seed potential that contributes to species dissemination is still poorly known. This study aimed to determine the seed potential of different livestock ruminant manures. To this end, cattle (Bos indicus), goat (Capra hircus) and sheep (Ovis aries) manures were collected in 45 distinct enclosures in the Sahelian zone of Burkina Faso following the three seasonal periods of the year. A total of 36 species in 13 families and 26 genera was identified in the coarse fraction of the three type of manure. The most abundant seeds in the manure are those of Fabaceae-mimosoideae, Fabaceae-caesalpinoideae, Rhamnaceae and Balanitaceae. The results showed that the contribution of goats to the total seed potential was 61% against 36% for sheep and 3% for cattle. The average number of seeds was 205 seeds/Kg of manure for goats, 125 seeds/Kg for sheep and 11 seeds/Kg for cattle. Depending on the collection period, the cold-dry season contributed 70% to the total annual seed potential against 22% of the hot-dry season and 8% for the rainy season. Following the species functional traits, goat spread more seeds of woody indehiscent pods (barochores species) containing one, 4 to 10 seeds with hard cores and integuments. Sheep spread more seeds of annual legumes having dehiscent pods (autochores) and more than 10 seeds. The most abundant seeds in the manure are those of agroforestry (Vachellia nilotica, Faidherbia albida, Piliostigma reticulatum), ruderal (Ipomoea eriocarpa) or invasive (Senna obtusifolia) species. The most frequently (RI Dactyloctenium aegyptium, Eleusine indica, Corchorus tridens, Sporobolus festivus and Ipomoea eriocarpa. Taxonomic and functional characteristics of the seed potential of ruminants manures shape the regeneration traits of agro-ecosystems through selective seed dissemination.

关键词： Cattle Goat Sheep Manure Seed Potential Species

2D Modeling of Solar Cell Radial Junction: Study of Carriers Charge Density and Photocurrent Density in Static Mode under Monochromatic Illumination

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Energy and Power Engineering 2020年第10期12卷 568-577页

作者： Moussa ouédraogo Raguilignaba Sam Alain Diasso Bernard Zouma François Zougmoré Laboratoire de Maté riaux d’H&eacute liophysique et Environnement (LaMHE) D&eacute partement de Physique UFR/ST Universit&eacute Nazi Boni Bobo Dioulasso Burkina Faso Laboratoire de Maté riaux et Environnement D&eacute partement de Physique UFR/SEA Universit&eacute Joseph Ki-Zerbo Ouagadougou Burkina Faso Laboratoire d’Energies Thermique Renouvelables (L.E.T.R.E) Universit&eacute Joseph Ki-Zerbo Ouagadougou Burkina Faso

A theoretical study of a polysilicon solar cell with a radial junction in static regime under monochromatic illumination is presented in this paper. The junction radial solar cell geometry is illustrated and described. The carriers’ diffusion equation is established and solved under quasi-neutral base assumption with boundaries conditions and Bessel equations. New analytical expressions of electrons and holes density and photocurrent are found. The wavelength and structural parameters (base radius, emitter thickness) influences on charge carriers density and photocurrent are shown and examined.

关键词： Electrons Density Holes Density Holes Photocurrent Radial Junction

Implication of Paleoproterozoic Basalt Fertility Related to Mantle Plume Activity in Nassara Gold Mineralization (Burkina Faso, West Africa)

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Open Journal of Geology 2022年第11期12卷 1013-1031页

作者： Pascal ouiya Adama ouédraogo Yaméogo Hermann Ilboudo Séta Naba Ecole Normale Supérieure (ENS) Institut Sciences et Technologies (IST) Ouagadougou Burkina Faso Laboratoire Géosciences et Environnement (LaGe) département des Sciences de la Terre Ouagadougou Burkina Faso Université Norbert ZONGO (UNZ) Koudougou Burkina Faso

The Birimian Nassara volcanic formations are located south of Gaoua in the southern part of the Boromo belt. Within these formations is the Nassara gold deposit where mineralization is hosted at the contact between basaltic volcanic rocks and sedimentary rocks. It is with the aim of understanding the geodynamic context of the basaltic rocks and the implication of their primary gold potential in the Nassara gold deposit that this work is carried out. To achieve our objectives, 28 samples of fresh basaltic rocks were geochemically analyzed for their major and trace element compositions. These analyses show that the Nassara basalts are Fe-rich tholeiitic basalts. Rare earth profiles (La/SmN = 0.75 - 1.50;La/YbN = 0.65 - 2.18) are fairly flat and without europium anomaly (Eu/Eu* = 0.90 - 1.09), nor niobium. In the Zr/Nb vs. Nb/Th and Nb/Y vs. Zr/Y binary diagrams, the Fe-rich tholeiitic basalts of Nassara, as well as those of the Houndé and Boromo belts, are placed in the field of oceanic plateau basalts related to a mantle plume system. A gold fertility test carried out on these basalts was positive. As other studies have already shown, the genetic link between gold deposits and mantle plumes appears to be a general rule. The scenario for the Nassara gold deposit is that it is the source magma that was already more or less enriched in gold and other related elements on its way up. The remobilization of this gold would have occurred during the Eburnean orogeny with the help of metamorphic, hydrothermal and deformation phenomena to be redeposited at the level of shear zones with economic grades. Through this analysis, we show that the fertility of the initial lithologies is very important for the formation of economic size deposits in the proximal shear zones. Exploration work should now integrate this dimension to define the best targets.

关键词： Nassara Gold Deposit Fe-Rich Basalt Oceanic Plateau Mantle Plume Gold Fertility

Transfer RNA-derived small RNA serves as potential non-invasive diagnostic marker and a novel therapeutic target for acute pancreatitis

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World Journal of Gastroenterology 2025年第1期31卷 152-156页

作者： Jing Zhang Chun-Lin ou Department of Immunology School of Basic MedicineCentral South UniversityChangsha 410000Hunan ProvinceChina Department of Pathology Xiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina

Transfer RNA(tRNA)-derived fragments,a new type of tRNA-derived small RNA(tsRNA),can be cleaved from tRNA by enzymes to regulate target gene expression at the transcriptional and translational *** are not only degradation fragments but also have biological functions,including those in immune inflammation,metabolic disorders,and cell *** dysregulation is closely associated with multiple diseases,including various cancers and acute pancreatitis(AP).AP is a common gastrointestinal disease,and its incidence increases *** development is associated with tsRNAs,which regulate cell injury and induce inflammation,especially pyroptosis and ***,serum tRF36 has the potential to serve as a non-invasive diagnostic biomarker and leads to pancreatic acinar cell ferroptosis causing inflammation to promote *** show the characteristics of tsRNAs and their diagnostic value and function in AP,and discuss the potential opportunities and challenges of using tsRNAs in clinical applications and research.

关键词： Transfer RNA derived small RNAs Acute pancreatitis Liquid biopsy Biomarker Cell pyroptosis Ferroptosis