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Ancient subsurface structure beneath crater Clavius:constraint by recent high-precision gravity and topography data

Research in Astronomy and Astrophysics 2019年第1期19卷 95-102页

作者： Zhen Zhong jian-Guo Yan j.alexis p.rodriguez School of physics and Electronic Science Guizhou Normal University State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan University Guizhou provincial Key Laboratory of Radio Astronomy and Data processing Guizhou Normal University planetary Science Institute

With the increasing precision of the GRAIL gravity field models and topography from LOLA, it is possible to investigate the substructure beneath crater Clavius. An admittance between gravity and topography data is commonly used to estimate selenophysical parameters, including load ratio, crustal thickness and density, and elastic thickness. Not only a surface load, but also a subsurface load is considered in estimation. The algorithm of particle swarm optimization(pSO) with a swarm size of 400 is employed as *** indicate that the observed admittance is best-fitted by the modeled admittance based on a spherical shell model, which was proved to be unsatisfactory in the previous study. The best-fitted load ratio f is around-0.194. Such a small load ratio conforms to the direct proportion between the nearly uncompensated topography and its corresponding negative gravity anomaly. It also indicates that a surface load dominates all the loads. Constrained within 2σSTD, a small crustal thickness(～30 km) and a crustal density of ～2587 kg m-3are found, quite close to the results from previous GRAIL research. Considering the well constrained crustal thickness and density, the best-fitted elastic thickness(～7 km) is rational. This result is slightly smaller than the previous study(～12 km). Such difference can be attributed to the difference in crustal density used and the precision of gravity and topography data. Considering that the small difference between the modeled gravity anomaly and observations is quite small, a parameter inversed here could be an indicator of the subsurface structure beneath Clavius.

关键词： Moon planetary systems:planets and satellites:fundamental parameters planetary systems methods:data analysis

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A new method to determine the gravity field of small bodies from line-of-sight acceleration data

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Research in Astronomy and Astrophysics 2019年第3期19卷 155-164页

作者： Nian-Chuan jian jian-Guo Yan jin-Song ping jean-pierre Barriot j.alexis p.rodriguez Shanghai Astronomical Observatory Chinese Academy of Science State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Instituto de Astronomia y Ciencias planetarias de Atacama Universidad de Atacama National Astronomical Observatory of China Chinese Academy of Science University of French polynesia Geodesy Observatory of Tahiti Laboratoire GEPASUD planetary Science Institute

We present a new method to derive line-of-sight acceleration observables from spacecraft radio tracking data. The observables can be used to estimate the mass and gravity of a natural satellite as a spacecraft flyby. The corresponding observation model adapts to one-way and two/three-way tracking modes. As a test case for method validation and application, we estimated the mass and degree two gravity field for the Martian moon phobos using simulated tracking data when the spacecraft Mars Express flew by phobos on 2013 December 29. We have a few real tracking data during flyby and they will be used to confirm raw data simulation. The main purpose of this paper is to demonstrate the method of line-of-sight acceleration reduction from raw tracking data and the feasibility to estimate mass and gravity of a natural satellite using this type of observable. This novel method is potentially applicable to planet and asteroid gravity field studies combined with Doppler tracking data.

关键词： line of sight acceleration-Doppler-celestial mechanics

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Estimation of the elastic thickness over ancient Mare Moscoviense

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Research in Astronomy and Astrophysics 2019年第12期19卷 318-326页

作者： Zhen Zhong jian-Guo Yan Teng Zhang Zhi-Yong Xiao jose alexis palmero rodriguez School of physics and Electronic Science Guizhou Normal UniversityGuiyang 550001China State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhan 430079China Instituto de Astronomiay Ciencias planetarias de Atacama Universidad de AtacamaCopayapu 485Chile planetary Science Institute Chinese University of Geosciences(Wuhan)Wuhan 430074China planetary Science Institute 1700 East Fort Lowell RoadSuite 106TucsonAZ 85719-2395USA

The Moscoviense basin is an atypical lunar impact basin with concentric rings of positive and negative gravity anomalies. This basin can provide insights into the inhomogeneous thermal activities across the farside of the Moon. Based on an updated spherical harmonic thin elastic-shell loading model, we used localized admittance analyses to estimate the elastic thickness as well as other associated selenophysical parameters for the Moscoviense basin. The high precision gravity and topography data employed in our estimation were collected by the Gravity Recovery and Interior Laboratory and the Lunar Orbiter Laser Altimeter missions. Our results indicate that the crust-mantle interface is mainly compensated by the prefilling depth rather than the observed surface topography. The results constrained within two standard deviations yielded a small load ratio(~0.168), a best-fit crustal thickness of 36.2 km, and an optimized crustal density of 3159.5 kg m-3. Such large density approaches the density of olivine-rich mantle materials, implying that the excavation of the Mare Moscoviense occurred during a basin-forming impact. The inversed elastic thickness at Mare Moscoviense was around 18 km, lower than the previous results(~60 km) found over Mare basins on the lunar nearside. These results indicate that extreme thermal activity existed during the Moscoviense basin-forming period such as reheating mechanisms from a double-impact process and mare volcanism.

关键词： Mare Moscoviense localized admittance thin elastic spherical shell elastic thickness

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Novel Kdr mutations (K964R and A943V) in pyrethroid-resistant populations of Triatoma mazzottii and Triatoma longipennisUoro Mexico and detoxifying enzymes

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Insect Science 2019年第5期26卷 809-820页

作者： jesus Davila-Barboza O.Karina Villanueva-Segura Beatriz Lopez-Monroy Gustavo ponce-Garcia Cristina Bobadilla-Utrera Mayela Montes-Rincon Zinnia j.Molina-Garza juan I.Arredondo-jimenez Iram p.rodriguez-Sanchez pablo C.Manrique-Saide Adriana E.Flores Universidad Autonoma de Nuevo Leon (UANL) Facultad de Ciencias BiologicasSan Nicolas de los GarzaNLMexico Laboratorio Estatal de Salud publica de los Servicios de Salud de Veracruz VeracruzMexico Campus de Ciencias Biologicas y Agropecuarias Unidad Colaborativa para Bioensayos EntomologicosUniversidad Autonoma de YucatanMeridaYucatanMexico

Although having five different ways of transmission the vector-borne is the principal way of transmission of Chagas disease, which involves insects of the subfamily Triatominae (Hemiptera: Reduviidae). Nineteen of the 31 species that occur in Mexico are associated with humans, and all are capable of transmitting the disease. pyrethroids are the insecticides recommended for the control of these vectors in Mexico. We determined the susceptibility to the pyrethroids dcltamethrin and permethrin of peridomestic populations of Triatoma mazzottii Usinger and two populations of Triatoma longipetmis Usinger in comparison with a reference strain for each species. Bioassays were performed for the determination of the LD50 for both field populations and reference strains. A maximum of 27 fold resistance to deltamethrin was observed in T. mazzottii, meanwhile, for permethrin, T. longipennis from jalisco show the highest value of 3.19 fold. There was significantly increased activity of esterases in field populations in comparison with their corresponding reference strain. The results of the search of kdr mutations related to the resistance to deltamethrin and permethrin in the evaluated species show the presence of mutations in the field populations, as is the case with individuals of T. mazzottii, for which the mutation was found A943V, and for the two populations of T. longipennis included in this study, we report the presence of the kdr mutation K964R. Evaluation of the various mechanisms involved in resistance to pyrethroids in triatomines from Mexico could guide us to the real justification for insecticide resistance monitoring.

关键词： detoxifying enzymes kdr pyrethroids Triatoma longipennis Triatoma mazzottii

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Sustainable Toilet for a Developing Nation

Sustainable Toilet for a Developing Nation

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2011 International Conference on Future Management Science and Engineering(ICFMSE 2011)

作者： jay N.Meegoda H.N.Hsieh p.rodriguez j.jawidzik Civil & Environmental Engineering NJIT Mechanical Engineering NJIT

The New jersey Institute of Technology working with the Center for the Rural Development of Milot（CRUDEM） in Milot,Haiti has developed an ecologically sustainable sanitation system for the local hospital H?pital Sacré *** will collect human waste,convert it into fertilizer through anaerobic digestion,and capture the methane gas emissions,which are a byproduct of the process for on-site use as a heating *** liquid and solid separation of human waste is done to prevent counter-productive saturation of the solid waste.A solid waste holding container was designed to allow anaerobic decomposition and for continuous fertilizer production and methane harvesting.

关键词： pathogen Agriculture Fertilizer Methane Capture Developing Country Sustainable Development Human waste anaerobic digestion

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predictors of 30-day readmission following pancreatic surgery:A retrospective review

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Hepatobiliary & pancreatic Diseases International 2018年第3期17卷 269-274页

作者： Leo I.Amodu jamil alexis Aron Soleiman Meredith Akerman poppy Addison Toni Iurcotta Horacio L.rodriguez Rilo Department of Surgery Hofstra-Northwell School of Medicine pancreas Disease Center Northwell Health Department of Biostatistics Feinstein Institute for Medical Research

Background： pancreatectomies have been identified as procedures with an increased risk of *** surgical patients, readmissions within 30 days of discharge are usually procedure-related. We sought to determine predictors of 30-day readmission following pancreatic resections in a large healthcare ***： We retrospectively collected information from the records of 383 patients who underwent pancreaticresections from 2004–2013. To find the predictors of readmission in the 30 days after discharge,we performed a univariate screen of possible variables using the Fisher’s exact test for categorical variables and the Mann–Whitney U test for continuous variables. Multivariate analysis was used to determinethe independent factors.

关键词： pancreatic predictors Readmission Resection Risk30-day

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Exosomes from adipose tissue-derived stem/stromal cells:A key to future regenerative medicine

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BIOCELL 2022年第12期46卷 2701-2704页

作者： jÉRÔME LALOZE alexis DESMOULIÈRE University of Limoges Neuropathies and Therapeutic Innovations(UR 20218)Faculties of Medicine and PharmacyLimogesF-87000France Department of Maxillo-Facial and Reconstructive Surgery and Stomatology University Hospital DupuytrenLimogesF-87000France

Advances in regenerative medicine correlate strongly with progress in the use of adipose tissue-derived mesenchymal stem/stromal *** range of therapeutic indications has also expanded over recent *** recent studies have highlighted the primary importance of paracrine secretion by these *** it is interesting to compare the different types of such secretions,we believe that exosomes(extra-cellular vesicles possessing the same properties as their source cells)will likely be the main key in tomorrow’s cell *** also have many advantages compared to the direct use of cells,making these particles amajor target in fundamental and translational research.

关键词： Adipose-derived mesenchymal stem/stromal cell Exosome Regenerative medicine Secretome

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Transcriptional changes in mesenteric and subcutaneous adipose tissue from Holstein cows in response to plane of dietary energy

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journal of Animal Science and Biotechnology 2018年第1期9卷 233-247页

作者： S.j.Moisá p.ji j.K.Drackley S.L.rodriguez-Zas j.j.Loor Department of Animal Sciences Auburn University Department of Animal Sciences University of Illinois

Background： Dairy cows can readily overconsume dietary energy during most of the prepartum period, often leading to higher prepartal concentrations of insulin and glucose and excessive body fat deposition. The end result of these physiologic changes is greater adipose tissue lipolysis post-partum coupled with excessive hepatic lipid accumulation and compromised health. Although transcriptional regulation of the adipose response to energy availability is well established in non-ruminants, such regulation in cow adipose tissue depots remains poorly ***： Effects of ad-libitum access to high [HIGH; 1.62 Mcal/kg of dry matter（DM）] or adequate（CON; 1.35 Mcal/kg of DM） dietary energy for 8 wk on mesenteric（MAT） and subcutaneous（SAT） adipose tissue transcript profiles were assessed in non-pregnant non-lactating Holstein dairy cows using a 13,000-sequence annotated bovine oligonucleotide microarray. Statistical analysis revealed 409 and 310 differentially expressed genes（DEG） due to tissue and diet. Bioinformatics analysis was conducted using the Dynamic Impact Approach（DIA） with the KEGG pathway database. Compared with SAT, MAT had more active biological processes related to adipose tissue accumulation（adiponectin secretion） and signs of pro-inflammatory processes due to adipose tissue expansion and macrophage infiltration（generation of ceramides）. Feeding the HIGH diet led to changes in m RNA expression of genes associated with cell hypertrophy（regucalcin）, activation of adipogenesis（phospholipid phosphatase 1）,insulin signaling activation（neuraminidase 1） and angiogenesis（semaphorin 4 G, plexin B1）. Further, inflammation due to HIGH was underscored by m RNA expression changes associated with oxidative stress response（coenzyme Q3, methyltransferase）, ceramide synthesis（N-acylsphingosine amidohydrolase 1）, and insulin signaling（interferon regulatory factor 1, phosphoinositide-3-kinase regulatory subunit 1, retinoic acid receptor alpha）. Activation of ribos

关键词： Adipose tissue Dairy cow Dietary energy Transcriptome

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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 well-described sequenee of events that lead to the emergence of a new root complete with its own 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 unknown role for camalexins in controlling lateral root patterning.

关键词： roots Arabidopsis cell

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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 well as calculations of conversion and product *** reactor is the most used experimental setup for carrying out exploratory studies for catalyst screening and *** work 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 own 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

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