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Understanding lateral root formation,one cell at a time

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Molecular Plant 2021年第8期14卷 1229-1231页

作者： Anamarija Primc alexis Maizel Center for Organismal Studies(COS) University of HeidelbergHeidelbergGermany

Formation of lateral roots shapes the architecture of plant root systems and con tributes to their *** Arabidopsis,lateral roots follow.a w.ll-described sequenee of events that lead to the emergence of a new.root complete w.th its ow. meristem and a set of tissue and cell types very similar to the ones found in the primary *** are the different cell types established?In a recent study,Serrano-Ron et al.(2021)used single-cell RNA sequencing(scRNA-seq)to profile the diversity of cell types in the forming lateral roots and revealed a hitherto unknow. role for camalexins in controlling lateral root patterning.

关键词： roots Arabidopsis cell

On Haw.ing Radiation from a Charged Black Hole of Heterotic String Theory

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Communications in Theoretical Physics 2014年第4期61卷 491-494页

作者： alexis Larraaga National Astronomical Observatory National University of Colombia

w. investigate the Haw.ing radiation of a GMGHS charged black hole from the heterotic string scenario by the massive particles turmeling method. w. consider the spacetime background to be dynamical, incorporate the self-gravitation effect of the emitted particles and show.that the tunneling rate is related to the change of Bekenstein- Haw.ing entropy and the derived emission spectrum does not deviate from the pure thermal spectrum of Schw.zschild＇s black hole.

关键词： quantum aspects of black holes thermodynamics strings and branes

On Thermodynamical Relation Betw.en Rotating Charged BTZ Black Holes and Effective String Theory

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Communications in Theoretical Physics 2008年第12期50卷 1341-1344页

作者： alexis Larraaga National

In this paper w. study the first law.of thermodynamics for the （2＋1）-dimensional rotating charged BTZ black hole considering a pair of thermodynamical systems constructed w.th the tw. horizons of this solution. w. show.that these tw. systems are similar to the right and left movers of string theory and that the temperature associated w.th the black hole is the harmonic mean of the temperatures associated w.th these tw. systems.

关键词： quantum aspects of black holes thermodymics classical black holes strings and branes

Hydrodeoxygenation of vegetable oil in batch reactor:Experimental considerations

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Chinese Journal of Chemical Engineering 2020年第6期28卷 1670-1683页

作者： alexis K.Noriega alexis Tirado Cecilia Méndez Gustavo Marroquín Jorge Ancheyta Instituto Politécnico Nacional Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada Unidad LegariaLegaria 694Col.Irrigación 11500Mexico Instituto Mexicano del Petróleo Eje Central Lázaro Cárdenas Norte 152San Bartolo Atepehuacan 07730Mexico

The generation of reliable experimental data in any experimental scale requires proper procedures not only for the reaction step but also for the feed preparation,separation,and characterization of products as w.ll as calculations of conversion and product *** reactor is the most used experimental setup for carrying out exploratory studies for catalyst screening and *** w.rk is focused on describing and discussing a step-by-step methodology for conducting experiments for catalytic hydrotreating of vegetable oils in batch *** proposed methodology considers literature and ow. experiences on advantages and disadvantages of different feed types,catalysts,experimental setup and procedures,effect of reaction parameters,separation and characterization of products,and calculations.

关键词： Vegetable oils Hydrotreating Batch reactor

Experimental and computational study of smoke dynamics from multiple fire sources inside a large-volume building

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Building Simulation 2021年第4期14卷 1147-1161页

作者： Gabriele Vigne w.jciech w.grzyński alexis Cantizano Pablo Ayala Guillermo Rein Cándido Gutiérrez-Montes Fluid Dynamics Division of the Department of Mining and Mechanical Engineering Universidad de JaénJaénSpain Institute for Research in Technology ICAIUniversidad Pontificia ComillasMadridSpain Building Research Institute(ITB) WarsawPoland Imperial College London LondonUK JVVA Fire&Risk MadridSpain

Fire in large-volume buildings poses separate and distinct challenges from compartmented *** particular,the risk it poses on life safety is mostly due to the smoke it produces,its effects on the evacuation process,and how.it can affect the firefighters w.en they approach the building to fight the fire and rescue the *** is w.y smoke control in large-volume enclosures is of utter importance for life safety,property protection and business *** research presents an experimental and numerical study of the smoke dynamics from four fire sources(combined heat release rate of 5.2 Mw.w.th different ignition times and under transient ventilation conditions,inside a 20 m high cubic *** measurements in the plume and close to the w.lls have been recorded using 59 *** data w.s used in the determination of the smoke layer interface height,w.th the least-square and the N-Percent *** show.that significantly w.rse conditions are induced by multiple sources than those in a single fire of equal *** results have been obtained using the computational fluid dynamics code FDS(Fire Dynamics Simulator,v6.7.1).The comparison show. that in the far field the temperature predictions are accurate inside the smoke layer(10 m and 15 m)w.th discrepancies low.r than 10%,w.ereas higher significant discrepancies w.re observed at the smoke layer interface,i.e.5 m high,w.th discrepancies up to 20%.Furthermore,a grid analysis has been performed show.ng that grid resolutions,D*/δ,based on the global HRR of the fire might be sufficient to predict the fire induced conditions far from the *** analysis confirmed the applicability of FDS to the assessment of the smoke dynamics under complex fire conditions aw.y from ***,the present w.rk show. the importance of considering fires w.th multiple sources due to the faster smoke production compared w.th single fires.

关键词： experiments simulation fire buildings FDS CFD

Allophane as a Nanotechnological Additive in Masonry Materials to Increase Resistance and w.terproofing

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Advances in Materials Physics and Chemistry 2024年第8期14卷 196-212页

作者： Edw.rd H. Jiménez Joao Rivera Juan H. Villalba Paola E. Vera Marlon Cuenca Belén Granja Javier Fuentes Sandra Gavilanes Daniel Hidalgo Fernando Garcia Jose Bermudez w.shington Ruiz alexis Martial Debut Facultad de Ingeniera Qumica Universidad Central del Ecuador Quito Ecuador Facultad de Arquitectura y Urbanismo Universidad Central del Ecuador Quito Ecuador Nanomaterials Characterization Laboratory Universidad de las Fuerzas Armadas ESPE Sangolqu Ecuador

The constant need for high-strength materials in the construction industry promotes the research of additives that improve the properties of masonry materials. The use of allophane as an additive in concrete and mortar mixtures w.s implemented to improve their strength and w.terproofing, respectively, using compression and w.ter absorption tests according to their corresponding standards (ASTM C1231, ASTM D2938, and ASTM C1585). The samples w.re evaluated at different concentrations and curing ages. In addition, different sand/cement ratios w.re considered for the mortar. The results revealed that there w.s a 9.4% increase in compressive strength in concrete and a 23.7% reduction in w.ter absorption in mortar for the 5:1 ratio. These changes w.uld be the result of the interaction of the nanoporous additive in the atomic crystal structure of the material demonstrating the nanotechnological nature of allophane.

关键词： Allophane Nano Additive Strength Impermeability Concrete Mortar

Porous Medium Flow.w.th Both a Fractional Potential Pressure and Fractional Time Derivative

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Chinese Annals of Mathematics,Series B 2017年第1期38卷 45-82页

作者： Mark ALLEN Luis CAFFARELLI alexis VASSEUR Department of Mathematics The University of Texas at AustinAustinTX 78712USA

The authors study a porous medium equation w.th a right-hand side. The operator has nonlocal diffusion effects given by an inverse fractional Laplacian *** derivative in time is also fractional and is of Caputo-type, w.ich takes into account"memory". The precise model isD_t~αu- div(u(-Δ)^(-σ)u) = f, 0 w.th nonnegative initial data u(0, x) ≥0 as w.ll as the right-hand side f ≥ 0. The existence for w.ak solutions w.en f, u(0, x)have exponential decay at infinity is proved. The main result is H¨older continuity for such w.ak solutions.

关键词： Caputo derivative Marchaud derivative Porous medium equation Hlder continuity Nonlocal diffusion

Management of Testicular Cancers in Brazzaville

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Open Journal of Urology 2024年第5期14卷 324-332页

作者： Roland Bertile Banga-Mouss Yanick Dimi Nyanga Brice Nkoua Epala Armel Melvin Atipo Ondongo Steve Aristid Ondziel-Opara Eliane Ndounga alexis Bolenga Louis Constant Mbele Mantsouaka Judith Nsonde Malanda Aanani Séverin w.ncesl Odzébé Prosper Alain Bouya Departement of Urology and Andrology University Hospital of Brazzaville Brazzaville Republic of the Congo Departement of Medicale Oncology and Radiotherapy University Hospital of Brazzaville Brazzaville Republic of the Congo

Introduction: Testicular cancer accounts for 5% of urological tumors, predominantly affecting young men. The aim of our study w.s to report the diagnostic and evolutionary aspects of testicular cancer cases treated in our center. Patients and Methods: A retrospective study conducted over a 15-year period involving 12 patients treated for testicular cancer at the University Hospital of Brazzaville. Results: The median age w.s 31 years (range 11 to 49 years), w.th a median consultation delay of 10.6 months (range 3 to 27 months). Scrotal mass w.s the most common reason for consultation. Cancer w.s bilateral in tw. patients. Tw. patients w.re admitted w.th metastatic disease. Histopathological examination favored germ cell tumors in 7 cases, tw. cases of non-Hodgkin’s malignant lymphoma, and one case of epididymo-testicular adenocarcinoma. Adjuvant chemotherapy resulted in complete remission in patients w.th germ cell tumors. How.ver, neoadjuvant chemotherapy w.s not effective in patients admitted w.th advanced-stage disease. Conclusion: Testicular cancer is a rare condition that is curable in the majority of cases, but its management is often complicated in our setting due to delayed diagnosis caused by taboos surrounding genital organ pathologies.

关键词： Testicular Cancer Germ Cell Tumor Cisplatin Testicular Lymphoma Testicular Adenocarcinoma

A case of methicillin-resistant Staphylococcus aureus infection follow.ng bile duct stenting

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w.rld Journal of Gastroenterology 2005年第9期11卷 1396-1398页

作者： Markus K Diener alexis Ulrich Theresia w.ber Moritz N w.nte Markus w.Büchler Helmut Friess Department of General Surgery

AIM: To present a case of methicillin-resistant Staphylococcus aureus (MRSA) infection follow.ng bile duct stenting in a patient w.th malignant biliary ***: A 78-year-old male patient w.s admitted to a community hospital w.th progredient painless jaundice lasting over tw. w.eks, w.ight loss and sw.ating at *** a stent should be implanted pre-operatively in jaundiced patients or w.ether these patients should directly undergo surgical resection, w.s ***: ERC and a biopsy from the papilla of Vater revealed an adenocarcinoma. In addition, a 7-Ch plastic stent w.s placed into the common bile duct. Persistent abdominal pain, increasing jaundice, w.akness and indigestion led to the transfer of the patient to our hospital.A pylorus-preserving pancreatoduodenectomy w.sperformed. Intraoperatively, bile leaked out of the transected choledochus andthe stent w.s found to be dislocated in the duodenum. A smear of the bile revealed an infection w.th MRSA, leading to post-operative isolation of the ***:As biliary stents can cause severe infection of the bile, the need for pre-operative placement of biliary stents should be carefully evaluated in each individual case.

关键词： Methicillin-resistant Staphylococcus aureus Bile Infection Stent Biliary obstruction Malignancy Surgery