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Behavior of diatomaceous soil in lacustrine deposits of Bogota, Colombia

Journal of Rock Mechanics and Geotechnical Engineering 2018年第2期10卷 367-379页

作者： Bernardo Caicedo Cristhian mendoza Fernando López Arcesio Lizcano Department of Civil and Environmental Engineering Universidad de Los AndesBogotáColombia Department of Civil Engineering Universidad Nacional de Colombia Sede ManizalesManizalesColombia Ecole Centrale Paris Laboratoire MSSMat-UMR CNRS 8579ParisFrance SRK Consulting VancouverCanada

This work presents a study on the behaviors of diatomaceous soils. Although studies are rarely reported on these soils, they have been identified in Mexico City, the Sea of Japan, the northeast coast of Australia,the equatorial Pacific, and the lacustrine deposit of Bogota(Colombia), among other locations. Features of this kind of soil include high friction angle, high initial void ratio, high compressibility index, high liquid limit, and low density. Some of these features are counterintuitive from a classical soil mechanics viewpoint. To understand the geotechnical properties of the diatomaceous soil, a comprehensive experimental plan consisting of more than 2400 tests was performed, including physical tests such as grain size distribution, Atterberg limits, density of solid particles, and organic matter content; and mechanical tests such as oedometric compression tests, unconfined compression tests, and triaxial *** tests were complemented with scanning electron microscope(SEM) observations to evaluate the microstructure of the soil. The test results show that there is an increase in liquid limit with increasing diatomaceous content, and the friction angle also increases with increasing diatomaceous content. In addition, several practical correlations were proposed for this soil type for shear strength mobilization and intrinsic compression line. Finally, useful correlations were presented, such as the relationship between the state consistency and the undrained shear strength, the friction angle and the liquid limit, the void ratio at 100 kPa and the liquid limit, the plasticity index and the diatomaceous content, among others.

关键词： Diatomaceous soil Soft soils Compressibility Friction angle Natural soil

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Mycobacterium avium subspecies paratuberculosis and its relationship with Crohn's disease

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World Journal of Gastroenterology 2009年第4期15卷 417-422页

作者： Juan Luis mendoza Raquel Lana Manuel Díaz-Rubio Inflammatory Bowel Disease Unit Department of GastroenterologyHospital Clínico San CarlosUniversidad Complutense Department of Internal Medicine Hospital Clínico San CarlosUniversidad Complutense

The hypothesis postulating that Mycobacterium avium paratuberculosis(MAP) is the cause of Crohn's disease(CD) has been circulating for many *** in molecular techniques,such as polymerase chain reaction and culture methods,have enabled researchers to demonstrate that there is an association between MAP and ***,genome-wide association studies have identified novel susceptibility genes for CD,which are critical for generation of an adaptive immune response that is protective against intracellular pathogens,including *** ***,the role of MAP as a cause of CD suffered a setback with the report that administration of antimycobacterial therapy failed to lead to a sustained response in CD ***,this review sought neither to confirm nor refute this,but instead to survey recent literature on the role of MAP in CD.

关键词： Mycobacterium avium subspecies paratuber-culosis Crohn's diasease Inflammatory bowel disease

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Activation of 2D MoS_(2) electrodes induced by high-rate lithiation processes

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Journal of Energy Chemistry 2023年第3期78卷 56-70,I0003页

作者： Tianzhu Liu Georgian Melinte Oleksandr Dolotko Michael Knapp Beatriz mendoza-Sánchez Institute for Applied Materials-Energy Storage Systems(IAM-ESS) Karlsruhe Institute of Technology(KIT)Eggenstein-Leopoldshafen D-76344Germany Karlsruhe Nano Micro Facility(KNMF) Karlsruhe Institute of Technology(KIT)Eggenstein-Leopoldshafen D-76344Germany Helmholtz-Institute Ulm for Electrochemical Energy Storage(HIU) Ulm 89081Germany

MoS_(2) is a highly promising material for application in lithium-ion battery anodes due to its high theoretical capacity and low ***,problems with a fast capacity decay over cycling,especially at the first cycles,and poor rate performance have deterred its practical ***,electrodes comprised solely of few-layers 2D MoS_(2) nanosheets have been manufactured by scalable liquid-phase exfoliation and spray deposition *** long-standing controversy questioning the reversibility of conversion processes of MoS_(2)-based electrodes was *** studies revealed that,in 2D MoS_(2) electrodes,conversion processes are indeed reversible,where nanostructure played a key *** of the electrodes at high current rates revealed an intriguing phenomenon consisting of a continuously increasing capacity after ca.100-200 *** phenomenon was comprehensively addressed by a variety of electrochemical and microscopy methods that revealed underlying physical activation mechanisms that involved a range of profound electrode structural *** mechanisms delivered a capacitive electrode of a superior rate performance and cycling stability,as compared to the corresponding pristine electrodes,and to MoS_(2) electrodes previously ***,we have devised a methodology to overcome the problem of cycling stability of 2D MoS_(2) ***,activation of electrodes constitutes a methodology that could be applied to enhance the energy storage performance of electrodes based on other 2D nanomaterials,or combinations thereof,strategically combining chemistries to engineer electrodes of superior energy storage properties.

关键词： 2D MoS_(2) Liquid-phase exfoliation Spray-deposition Conversion processes Activation mechanisms Energy storage mechanisms

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Some contributions to mechanical behaviors of lacustrine deposit in Bogota, Colombia

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Journal of Rock Mechanics and Geotechnical Engineering 2019年第4期11卷 837-849页

作者： Bernardo Caicedo Cristhian mendoza Arcesio Lizcano Fernando Lopez-Caballero Department of Civil and Environmental Engineering Universidad de Los AndesBogotaColombia Department of Civil Engineering Universidad Nacional de Colombia Sede ManizalesManizalesColombia SRK Consulting VancouverCanada Laboratoire MSS-Mat CNRS UMR8579CentraleSupelecParis-Saclay UniversityFrance

This paper presents the mechanical behaviors of the lacustrine deposit,a representative soil in Bogota,***,the physical characterization of the deposit is performed via laboratory tests (grain size distribution,scanning electron microscopy,Atterberg limits and water content).This characterization intends to explain the special characteristics of the mechanical behaviors of this ***,various triaxial tests are carried out with controlled loading path,strain rate change,relaxation,extensile stress,and cyclic *** test results reveal the shape of the yield curve for Bogotá soil (in a natural state),and also show that an increasing effect of the strain rate depends on the liquid *** effect is also preserved with extensile stresses (which are poorly studied in soil mechanics).Finally,other effects,such as the loss of structure in the reconstituted samples and the effect of shear modulus at low strains,are studied for Bogota soil.

关键词： Cyclic triaxial tests Triaxial compression test Time-dependent response Lacustrine soils Soil compressibility Yield curve

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Nutritional Supplement Ocoxin® Combined with Gemcitabine-Based Chemotherapy in Patients with Advanced Pancreatic Adenocarcinoma

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Open Journal of Gastroenterology 2024年第8期14卷 267-287页

作者： Mayté Lima-Pérez Jorge Luis Soriano-García Masiel González-Meisozo Jorge Luis Soriano-Lorenzo Vilma Fleites-Calvo Dunia Morales-Morgado Carlos Domínguez-Álvarez Iván Ramón-Concepción Raidel Rodríguez-Barrios Alicia Tarinas-Reyes Ivis mendoza-Hernández Rolando Uranga-Piña Clinical Oncology Department Ameijeiras Hospital Havana Cuba Clinical Pathology Department Ameijeiras Hospital Havana Cuba Clinical Section National Coordinating Centre for Clinical Trials Havana Cuba Biostatistics Section National Coordinating Centre for Clinical Trials Havana Cuba

Background: the quality of life (QoL) of patients with pancreatic ductal adenocarcinoma (PDAC), with its limited survival, can be affected by chemotherapy-induced toxicity. The main objective was to evaluate the effect of introducing ocoxin oral solution (OOS) in combination with standard therapy on quality of life. Methods: Thirty patients were enrolled in an exploratory, prospective, single-centre clinical trial in the oncology department of “Hermanos Ameijeiras” University Hospital in Havana, Cuba. Quality of life was measured using the EORTC QLQ-C30 questionnaire and toxicity was assessed using the NCI-CTC-AE classification version 5.0. Results: There was stability in the scores over time for overall QoL and the functional scale criteria, while in terms of symptoms, fatigue, pain and loss of appetite were reduced. No grade 3 - 4 adverse events (AEs) were recorded, and only 14.9% of toxicities were classified as grade 2, and these were considered to be unrelated to OOS. Biochemical and nutritional parameters were normalised at 12 months compared to the baseline values. Conclusions: This clinical study is the first report of the use of OOS in patients with advanced pancreatic cancer, and demonstrates that it is able to maintain optimal quality of life with reduced severity of toxicity during and after combination treatment with gemcitabine-based chemotherapy.

关键词： EORTC QLQ-C30 Ocoxin Chemotherapy Pancreatic Cancer Quality of Life

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Azospirillum brasilense and Saccharomyces cerevisiae as Alternative for Decrease the Effect of Salinity Stress in Tomato(Lycopersicon esculentum)Growth

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Phyton-International Journal of Experimental Botany 2022年第1期91卷 21-32页

作者： Ali Abdelmoteleb Daniel Gonzalez-mendoza Ahmed Mohamed Elbaalawy Botany Department Faculty of AgricultureMenoufia UniversityShebin El-KomPo 32511Egypt Instituto de Ciencias Agrícolas Universidad Autónoma de Baja CaliforniaCarretera a Delta s/n Ejido Nuevo LeónBaja CaliforniaCP 21705México Department of Soil Science Faculty of AgricultureMenoufia UniversityShebin El-KomPo 32511Egypt

The salinity stress is one of the most relevant abiotic stresses that affects the agricultural *** present study was performed to study the improvement of the salt tolerance of tomato plants which is known for their susceptibility to salt *** present study aimed to assess to what extent strain Azospirillum brasilense(N040)and Saccharomyces cerevisiae improve the salt tolerance to tomato plants treated with different salt *** inoculant strain ***(N040)was previously adapted to survive up to 7%NaCl in the basal media.A greenhouse experiment was conducted to evaluate the effect of this inoculation on growth parameter such as:plant height,root length,fresh and dry weight,fruits fresh weight,chlorophyll content,proline and total soluble sugar in tomato plants under salt stress *** results revealed that co-inoculation of Azospirillum brasilense(N040)and Saccharomyces cerevisiae significantly increased the level of proline(8.63 mg/g FW)and total soluble sugar(120 mg/g FW)of leaves under salinity condition comparing to non-inoculated plants(2.3 mg/g FW and 70 mg/g FW,respectively).Plants co-inoculated with adapted strain of *** and *** showed the highest significant(p<0.01)increase in fruit yield(1166.6 g/plant),plant high(115 cm)and roots length(52.6)compared whit un-inoculated control plants(42 g/pant,43.3 cm and 29.6 cm,respectively).In contrast,Na^(+)ion content was significantly decreased in the leaves of salt stressed plants treated with the ***(N040)and ***,the results showed that dual benefits provided by both ***(N040)and *** can provide a major way to improve tomato yields in saline soils.

关键词： Salinity stress tomato proline exopolysaccharides microorganism

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Endoscopic mucosal ablation-an alternative treatment for colonic polyps:Three case reports

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World Journal of Gastroenterology 2020年第45期26卷 7258-7262页

作者： Antonio mendoza Ladd Joaquin Espinoza Cesar Garcia Department of Internal Medicine Division of GastroenterologyTexas Tech University Health Sciences CenterPaul L Foster School of MedicineEl PasoTX 79905United States Escuela de Medicina Luis Razetti Universidad Central de VenezuelaCaracas 999188Venezuela Department of Endoscopy University Medical Center of El PasoEl PasoTX 79905United States

BACKGROUND Endoscopic resection of non-invasive lesions is now the standard of care for lesions in the GI ***,resection techniques require extensive training,are not available in all endoscopy centers and are prone to *** mucosal ablation(EMA)is a combination of resection and ablation techniques and it may offer an alternative in the management of such *** SUMMARY In this case series we report the successful treatment of three flat colonic polyps using the EMA *** lesions were treatment naïve and 1 was a recurrence after an endoscopic mucosal *** sizes ranged from 2 to 4 *** three polyps were ablated successfully with no immediate or delayed *** recurrence rate at 1 year of follow up was 0%.CONCLUSION Based on this initial experience,we conclude that EMA is a safe and effective technique for the treatment of non-invasive colonic polyps when endoscopic resection techniques are not available.

关键词： Endoscopy Mucosal ablation Colon polyp Argon plasma coagulation Alternative Safe Case report

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Green Synthesis of Silver Nanoparticles from Abronia villosa as an Alternative to Control of Pathogenic Microorganisms

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Journal of Renewable Materials 2020年第1期8卷 69-78页

作者： Ali Abdelmoteleb Benjamin Valdez-Salas Ernesto Beltran-Partida Daniel Gonzalez-mendoza Botany Department Faculty of AgricultureMenoufia UniversityShebin El-Kom32511Egypt Instituto de Ingeniería de la Universidad Autónoma de Baja California MexicaliBaja California21100México Instituto de Ciencias Agrícolas de la Universidad Autónoma de Baja California(ICA-UABC) Ejido Nuevo LeónBaja California21705México

The aim of this study was to evaluate the antibacterial and antifungal activities of eco-friendly synthesized silver *** silver nanoparticles were synthesized by biological method using aqueous extract of Abronia *** of silver nanoparticles was confirmed by color change and characterized using UV-visible spectroscopy,scanning electron microscope(SEM),energy dispersive X-ray spectroscopy(EDX),dynamic light scattering(DLS),and zeta potential *** SEM analysis revealed the presence of spherical silver nanoparticles of the size range 21 to 33 *** silver nanoparticles were used to evaluate their antibacterial effects at different concentrations(25,50,75 and 100μg/ml)on gram negative and gram positive *** biggest halo zone was observed at 75 and 100μg/ml concentrations of silver nanoparticles against both gram positive and gram negative *** activity of biosynthesized silver nanoparticles was evaluated against seven different phytopathogenic *** showed high inhibition of radial growth toward all tested *** highest inhibition of fungal growth by AgNPs was recorded against Macrophomina phaseolina(86.06±0.92%).Biosynthesized AgNPs using plant extract are a promising to use safety for various biomedical and agricultural applications.

关键词： Antibacterial activity antifungal activity green synthesis

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Impact of ZnSO_(4)^(-)and ZnO Nanoparticles on Seed Germination and Seedling Growth of Lettuce

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Phyton-International Journal of Experimental Botany 2023年第6期92卷 1831-1840页

作者： Adalberto Benavides-mendoza Rebeca Betancourt-Galindo Nazario Francisco-Francisco Departamento de Horticultura Universidad Autónoma Agraria Antonio NarroSaltillo25315México Departamento de Materiales Avanzados Centro de Investigación en Química AplicadaSaltillo25294México Departamento de Agricultura Sustentable y Protegida Universidad Tecnológica de TehuacánTehuacán75859México

Micronutrient nanoparticles(NPs)are currently an option for chemical fertilization and biostimulation in ***,there is little information on the phytotoxic or biostimulatory effects of NPs at low concentrations of some elements,such as *** this study,the effect of low concentrations of Zn oxide(ZnO)NPs on germination,growth variables,and nutritional attributes of lettuce(Lactuca sativa L.)was evaluated in comparison to Zn *** lettuce seeds were treated with ZnSO_(4)^(-)×7H_(2)O and ZnO NPs at Zn molar concentrations of 1×10^(−3),5×10^(−3),1×10^(−4),5×10^(−4),1×10^(−5),5×10^(−5),1×10^(−6),and 5×10^(−6).The seeds treated with ZnSO4−at 5×10^(−6)registered the highest radicle length,73%more than the control *** seeds treated with ZnSO4−at 5×10^(−3)registered the lowest values,with 50%less than the control *** NPs at 5×10^(−6)significantly increased content of chlorophyll A and B and total *** results indicate the possible existence of a mechanism related to the intrinsic nanoparticle properties,especially at low concentrations.

关键词： Micronutrients biostimulation nanotechnology nanofertilizers germination chlorophyll total phenols

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Teen reactions to a self-representational avatar:A qualitative exploration

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Journal of Sport and Health Science 2022年第2期11卷 157-163,I0002页

作者： Emily Baysden Ninna mendoza Chishinga Callender Zhigang Deng Debbe Thompson United States Department of Agriculture/Agricultural Research Service Children’s Nutrition Research Center Department of PediatricsBaylor College of MedicineHoustonTX 77030USA Department of Computer Science University of HoustonHoustonTX 77204USA

Purpose:This research presents findings from a qualitative exploration of the reactions of adolescents(12-14 years old)to navigating an exergame with an avatar created from multiple scans of the player(referred to as a self-representational avatar).Methods:Post-gameplay interviews were conducted with adolescents following participation in a 20-min laboratory session(21.2±0.8 min,mean±SD)where the self-representational avatar was navigated through an *** transcripts(n=40)were coded and analyzed by 2 independent coders using hybrid thematic analysis for this secondary data *** were reviewed to identify themes representing adolescents’***:Four themes *** connected with their avatars and felt protective toward them,which influenced their actions in the exergame and contributed to their overall game ***:Creating exergames navigated by a self-representational avatar was an enjoyable experience and influenced *** research should explore the effect of this approach on gameplay frequency and intensity over time.

关键词： Avatar Exergame Physical activity Relatedness Self-determination theory

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