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World Journal of Immunology 2024年第1期14卷 1-16页

作者： Akashlina Marik Saheli Biswas ena Ray Banerjee Department of Zoology University of CalcuttaKolkata 700019West BengalIndia

The immune system,host brain development,and general metabolism are all influenced by the gut *** make up the majority of the gut microbiota in *** mouse has been the most often used animal model in preclinical biological *** mice,Firmicutes and Clostridiales are *** the other hand,Bacteroidaceae,Prevotellaceae,and Firmicutes are commonly found in *** this review,we performed a detailed study by focusing on a comparison between human and murine gut microbiomes,role of the microbiome and their secreted metabolites in regulating gut immunity to maintain homeostasis,and changes in the microbial composition in the dysbiotic state.

关键词： Gut microbiome Immunity Inflammatory Bowel disease Diabetes Dysbiosis

Investigation of bright and dark solitons in α,β-Fermi Pasta Ulam lattice

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Chinese Physics B 2021年第2期30卷 211-219页

作者： Nkeh oma Nfor Serge Bruno Yamgoué Francois Marie Moukam Kakmeni Department of Physics Higher Teacher Training College BambiliThe University of BamendaP.O.Box 39Bambili-Cameroon Complex Systems and Theoretical Biology Group Laboratory of Research on Advanced Materials and Nonlinear Science(LaRAMaNS)Department of PhysicsFaculty of ScienceUniversity of BueaP.O.Box 63 Buea-Cameroon

We consider the Hamiltonian ofα,β-Fermi Pasta Ulam lattice and explore the Hamilton-Jacobi formalism to obtain the discrete equation of *** using the continuum limit approximations and incorporating some normalized parameters,the extended Korteweg-de Vries equation is obtained,with solutions that elucidate on the Fermi Pasta Ulam *** further derive the nonlinear Schrodinger amplitude equation from the extended Korteweg-de Vries equation,by exploring the reductive perturbative *** dispersion and nonlinear coefficients of this amplitude equation are functions of theαandβparameters,with theβparameter playing a crucial role in the modulational instability analysis of the ***βgreater than or equal to zero,no modulational instability is observed and only dark solitons are identified in the *** forβless than zero,bright solitons are traced in the lattice for some large values of the *** of numerical simulations of both the Korteweg-de Vries and nonlinear Schr¨odinger amplitude equations with periodic boundary conditions clearly show that the bright solitons conserve their amplitude and shape after collisions.

关键词： Fermi Pasta Ulam paradox bright dark

Effects of Imposing Import Tariffs on a Country's Economic Growth-a Case Study on Malawi

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Effects of Imposing Import Tariffs on a Country's Economic G...

作者： TAPIWA RUTH NG'oma 河北大学

学位级别：硕士

There has been an ongoing debate as to whether there is any relationship betweenimposition of import tariffs and economic growth in developing countries. Thus, this paperaims at empirically and theoretically analysing the effects that imposition of import tariffs haveon economic growth in Malawi over the period of1982–2011. This relationship is examinedusing the Autoregressive Moving Average (ARIMA) model which will test the effect of animplemented import tariff policy on GDP growth.The Autoregressive Moving Average regression results reveal that there is a relationshipbetween imposed import tariffs and economic growth in Malawi, that is, a reduction in theaverage import tariff rate leads to a rise in GDP growth. These results strongly support the role,import trade can play in Malawi’s economic development. This means that by adopting goodimport tariff policies, Malawi will eventually boost domestic production hence the GDPgrowth.

关键词： Import tariffs Economic growth and Malawi Revenue Authority

OFDM-WDM LR-PON with ultra-bendable fiber for last-mile distribution of quintuple-play service

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Chinese Optics Letters 2013年第8期11卷 18-23页

作者： Tiago M. F. Alves Rakesh Sambaraju Adolfo V. T. Cartaxo Anthony Ng'oma Instituto de Telecomunicao es Department of Electrical and Computer Engineering Instituto Superior Tcnico Technical University of Lisbon1049-001 Lisbon Portugal Science and Technology Department Corning Incorporated One Riverfront PlazaCorning NY 14831 USA

The provision of quintuple-play services along wavelength division multiplexed （WDM） long-reach passive optical networks （LR-PONs） employing an ultra-bendable fiber in last-mile distribution is demonstrated experimentally. Particularly, the simultaneous transmission of three 100-GHz-spaced optical channels for the provision of double sideband orthogonal frequency-division multiplexing （OFDM） wireless and wired quintuple-play services to the premises of users located at 75, 85, and 100 km away from the central office is demonstrated. The OFDM-WDM LR-PON is tested considering the last-mile fiber distribution suffering from severe bending conditions without optical dispersion compensation. The experiments are performed for a worst last-mile fiber bending case emulated by considering a Corning ClearCurve fiber experiencing 20 bends and a bend radius of 7.5 mm. All the OFDM signals received at the premises of users present error vector magnitude （EVM） levels compliant with the EVM thresholds of the corresponding standards. An EVM degradation in the OFDM signals received by each user not exceeding 0.8 dB due to the last-mile distribution fiber is achieved.

关键词： WDM PON OFDM-WDM LR-PON with ultra-bendable fiber for last-mile distribution of quintuple-play service LR

Germination of Chenopodium Album in Response to Microwave Plasma Treatment

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Plasma Science and Technology 2008年第4期10卷 506-511页

作者： Bo■ena ER Vitězslav STRA■K Michal ER■ Milan TICH■ Petr PATENKA Institute of Systems Biology and Ecology Academy of Sciences of the Czech RepublicNa Sádkách 7CZ-370 05eské BudějoviceCzech Republic University of South Bohemia in eské Budějovice Department of PhysicsJeronymova 10CZ-371 15 eské BudějoviceCzech Republic Charles University in Prague Faculty of Mathematics and PhysicsV Holeovikách 2CZ-180 00 Praha 8Czech Republic University of South Bohemia in eské Budějovice Department of PhysicsJeronymova 10 CZ-371 15 eské BudějoviceCzech Republic Technical University of LiberecDepartment of Material SciencesHáIkova 6CZ-461 17 Liberec iCzech Republic

The seeds of Lamb＇s Quarters （Chenopodium album agg.） were stimulated by low- pressure discharge. The tested seeds were exposed to plasma discharge for different time durations （from 6 minutes to 48 minutes）. Germination tests were performed under specified laboratory conditions during seven days in five identical and completely independent experiments. Significant differences between the control and plasma-treated seeds were observed. The treated seeds showed structural changes on the surface of the seat coat. They germinated faster and their sprout accretion on the first day of seed germination was longer. Germination rate for the untreated seeds was 15% while it increased approximately three times （max 55%） for seeds treated by plasma from 12 minutes to 48 minutes.

关键词： early growth germination Lamb's Quarters seed enhancement stimulation surfatron discharge

Liver dysfunction and SARS-CoV-2 infection

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World Journal of Gastroenterology 2021年第26期27卷 3951-3970页

作者： Abraham Edgar Gracia-Ramos Joel omar Jaquez-Quintana Raúl Contreras-omaña Moises Auron Department of Internal Medicine General HospitalNational Medical Center"La Raza"Instituto Mexicano del Seguro SocialMexico City 02990Mexico Gastroenterology Service and Department of Internal Medicine Faculty of MedicineUniversity Hospital"Dr.JoséE.González"Universidad Autónoma de Nuevo LeónMonterrey 64460Mexico Centro de Estudio e Investigación en Enfermedades Hepáticas y Toxicológicas(CEIHET) Pachuca 42184Mexico Departments of Hospital Medicine and Pediatric Hospital Medicine Cleveland ClinicClevelandOH 44195United States

Severe acute respiratory syndrome coronavirus 2 infection is the cause of coronavirus disease 2019(COVID-19),which predominantly affects the respiratory system;it also causes systemic and multi-organic *** damage is among the main extrapulmonary ***-19-associated liver injury is defined as any liver damage occurring during the disease course and treatment of COVID-19 in patients with or without pre-existing liver disease,and occurs in approximately one in five *** liver test results have been associated with a more severe course of COVID-19 and other complications,including *** linking COVID-19 to liver injury are *** consideration should be made for patients with pre-existing liver disease,such as metabolic dysfunction-associated fatty liver disease,chronic liver disease due to viral or autoimmune disease,liver transplant carriers,or cirrhosis,given the risk for more severe *** manuscript summarizes the current lines of evidence on COVID-19-associated liver injury regarding pathophysiology,clinical significance,and management in both patients with or without preexisting liver disease,to facilitate clinicians’access to updated information and patient ***,we mention the ideas and recommendations to be considered for future research.

关键词： SARS-CoV-2 Coronavirus COVID-19 Liver Liver diseases Liver failure Liver injury Cirrhosis

Dynamics of Nerve Pulse Propagation in a Weakly Dissipative Myelinated Axon

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Journal of Modern Physics 2016年第10期7卷 1166-1180页

作者： Nkeh oma Nfor Mebu Tatason Mokoli Complex Systems and Theoretical Biology Group Laboratory of Research on Advanced Materials and Nonlinear Science(LaRAMaNS) Department of Physics Faculty of ScienceUniversity of Buea Buea Cameroon Laboratory of Research on Advanced Materials and Nonlinear Science (LaRAMaNS) Department of Physics Faculty of Science University of Buea Buea Cameroon

We analytically derived the complex Ginzburg-Landau equation from the Liénard form of the discrete FitzHugh Nagumo model by employing the multiple scale expansions in the semidiscrete approximation. The complex Ginzburg-Landau equation now governs the dynamics of a pulse propagation along a myelinated nerve fiber where the wave dispersion relation is used to explain the famous phenomena of propagation failure and saltatory conduction. Stability analysis of the pulse soliton solution that mimics the action potential fulfills the Benjamin-Feir criteria for plane wave solutions. Finally, results from our numerical simulations show that as the dissipation along the myelinated axon increases, the nerve impulse broadens and finally degenerates to front solutions.

关键词： Ginzburg-Landau Equation Liénard Form Fitz Hugh Nagumo Model Semidiscrete Approximation Saltatory Conduction Benjamin-Feir Criteria Dissipation

Localized nonlinear waves in a myelinated nerve fiber with self-excitable membrane

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Chinese Physics B 2023年第2期32卷 150-162页

作者： Nkeh oma Nfor Patrick Guemkam Ghomsi Francois Marie Moukam Kakmeni Department of Physics HTTC BambiliUniversity of BamendaP.P.Box 39 BambiliCameroon Complex Systems and Theoretical Biology Group Laboratory of Research on Advanced Materials and Nonlinear Science(LaRAMaNS)Department of PhysicsFaculty of ScienceUniversity of BueaP.O.Box 63 BueaCameroon

We systematically study the evolution of modulated nerve impulses in a myelinated nerve fiber, where both the ionic current and membrane capacitance provide the necessary nonlinear feedbacks. This is achieved by using a perturbation technique, in which the Liénard form of the modified discrete Fitzhugh–Nagumo equation is reduced to the complex Ginzburg–Landau amplitude equation. Three distinct values of the capacitive feedback parameter are considered. At the critical value of the capacitive feedback parameter, it is shown that the dynamics of the system is governed by the dissipative nonlinear Schr?dinger equation. Linear stability analysis of the system depicts the instability of plane waves,which is manifested as burst of modulated nerve impulses that fulfills the Benjamin–Feir criteria. Variations of the capacitive feedback parameter generally influences the plane wave stability and hence the type of wave profile identified in the neural network. Results of numerical simulations mainly confirm the propagation, collision, and annihilation of nerve impulses in the myelinated axon.

关键词： myelinated nerve Fitzhugh–Nagumo capacitive feedback parameter Ginzburg–Landau collision annihilation

Letter to the Editor concerning:Gallbladder perforation:A single-center experience in north India and a step-up approach for management

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Hepatobiliary & Pancreatic Diseases International 2022年第6期21卷 617-618页

作者： Hermilo Jeptef Angeles-Mar Mariano Garcia-Camp RodrigoEnrique Elizondo-omaña Santos Guzmán-López Javier Humberto Martinez-Garza Alejandro Quiroga-Garza Universidad Autonoma de Nuevo Leon School of MedicineHuman Anatomy DepartmentMonterreyNuevo León CP 64460México Universidad Autonoma de Nuevo Leon School of MedicinePlataforma INVEST-KER Unito Mayo Clinic(KER Unit Mexico)MonterreyNuevo LeónMéxico General Surgery Division Instituto Mexicano del Seguro SocialMonterreyNuevo LeónMéxico

To the Editor:We sincerely applaud the work done by Gupta et al.,in which they analyzed a single-center experience regarding gallbladder per-foration(GBP)management[1].Currently,there is a lack of cohort studies to adequately describe the approach strategies and man-agement for this pathology,with international guidelines making ambiguous recommendations[2,3].Their study stratified GBP types and provided details regarding clinical presentation,comorbidities,preoperative diagnosis,etiology,imaging techniques,and surgical *** study reported a high conversion rate when a la-paroscopic approach was attempted for cholecystectomy.

关键词： diagnosis concerning approach

Probiotic treatment of inflammatory bowel disease:Its extent and intensity

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World Journal of Immunology 2022年第2期12卷 15-24页

作者： Saheli Biswas ena Ray Banerjee Department of Zoology University of CalcuttaKolkata 700019West BengalIndia

Free radicals(reactive oxygen species,superoxides and hydroxyl radicals)lead to the development of oxidative stress because of imbalance in the amount of *** development of oxidative stress leads to chronic diseases in *** instability in the antioxidant activities and accumulation of oxidative stress due to free radicals may occur in diseases like inflammatory bowel disease(IBD).Antioxidants are substances that inhibit or delay the mechanism of oxidation of molecules mediated by free radicals and also transform into lesseractive *** are defined as live microorganisms that show beneficial effects on inflamed intestine and balance the inflammatory immune responses in the *** strains have been reported to scavenge hydroxyl radicals and superoxide anions that are abundantly produced during oxidative *** most widely studied probiotic strains are Streptococcus,Bifidobacterium and *** cultured in broth have shown some amount of antioxidant *** milk and soy milk,which possess starter microorganisms(probiotics),tends to increase the antioxidant activities *** review aims to discuss the in vivo and in vitro antioxidant activities of specific probiotics with various assays with respect to IBD.

关键词： Oxidative stress Inflammatory bowel disease Probiotics Therapy Antioxidative activity