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| 1 | Advances in Tropical Soil Characterization via Portable X-Ray Fluorescence Spectrometry显示文摘Portable X-ray fluorescence(pXRF) spectrometers can be used to determine the elemental composition easily, rapidly, and without using chemical reagents, which is very important for tropical regions due to the lack of detailed soil characterization data. Moreover,pXRF data can be used to predict the results of more expensive, time-consuming, and conventional laboratory analyses. This study sought to determine the elemental composition of various soil profiles using pXRF. Two operational modes(Trace Mode and General Mode) and two scanning time(30 and 60 s) were assessed to determine their effects on the correlation of pXRF dataset with respect to conventional inductively coupled plasma(ICP)-optical emission spectrometry analysis. This relationship has been reported in previous studies, however, few studies were performed on tropical soils, which are unique. Furthermore, such relationships establish the viability of developing prediction models directly from pXRF data. Linear regression was applied to develop calibration models for the prediction of ICP analysis results and exchangeable and available elemental contents based on pXRF data. High coefficients of determination(R^2) were obtained for Ca(0.87), Cu(0.90), Fe(0.95), Mn(0.85), Cr(0.95), V(0.72), and Ni(0.90), with adequate validation. Statistically significant results were not found for Al, K, Zn, Ti, and Zr. The models predicting the exchangeable Ca based on the total Ca from p XRF reached an R^2 of up to 0.85. Operational modes influenced the pXRF results. Our results illustrate that pXRF holds great promise for tropical soil characterization and the development of prediction models, justifying the need for larger-scale studies in tropical countries worldwide. | Elen A. SILVA David C. WEINDORF Sergio H. G. SILVA Bruno T. RIBEIRO Giovana C. POGGERE Teotonio S. CARVALHO Mariana G. M. GONQALVES Luiz R. G. GUILHERME Nilton CURI | 2019 | Pedosphere2019，29，4： | 5 |
| 2 | Similar Soils but Different Soil-Forming Factors: Converging Evolution of Inceptisols in Brazil显示文摘Soils result from the interaction of five independent formation factors.If one factor varies,while the others remain constant,different soils can be produced.Herein,we demonstrated an opposing trend,wherein two soils were similar,despite considerable differences in all factors of soil formation.We sampled two Inceptisols(Oxic Dystrudepts) formed on different parent materials(gneiss vs.mica schist),climate(tropical altimontane vs.warmer,drier plateau),topography(1 650 m,45% slope vs.1 000 m,8% slope),time(rejuvenated vs.old,stable surface),and vegetation(rainforest vs.Cerrado savanna).The two soils had similar chemical properties,whereas the soil on mica schist had finer particle size distribution,lower porosity,and lower saturated hydraulic conductivity.These properties were related to a coarser blocky microstructure compared to the soil on gneiss.Both soils presented active mineral weathering and pronounced pedoplasmation,demonstrated by clay contents>300 g kg^(-1),although only the Dystrudept on gneiss possessed coarse rock fragments.The C horizons of both soils presented fragmented clay coatings suggestive of argilluviation,likely relict,because they were not observed in the B horizons.The similarities in many properties of the two Dystrudepts,despite contrasting factors of soil formation,suggest converging evolution and that soil classification at the subgroup level was efficient in grouping similar formative processes in tropical conditions.Moreover,this work revealed that similar pedogenic processes acting on different factors of soil formation can result in similar soil properties,at least for Inceptisols where further soil development is hindered by topographic limitations. | Alba L.A.SKORUPA Sérgio H.G.SILVA Giovana C.POGGERE Diego TASSINARI Leundro C.PINTO Yuri L.ZINN Nilton CURI | 2017 | Pedosphere2017，27，4： | 2 |
| 3 | Structural incorporation of titanium and/or aluminum in layered silicate magad//te through direct synthesis 显示文摘 | PIRES C T NILTON G OLIVEIRA J | 2012 | Mater Chern Phys2012，135，2： | 1 |
| 4 | Diagnosis of knee injuries: comparison of the physical examination and magnetic resonance imaging with the findings from arthroscopy显示文摘 | Nilton Orlando Júnior Marcos George de Souza Le?o Nelson Henrique Carvalho de Oliveira | 2014 | Revista Brasileira de Ortopedia (English Edition)2014，，： | 1 |
| 5 | Proximal sensor-enhanced soil mapping in complex soil-landscape areas of Brazil显示文摘Portable X-ray fluorescence(pXRF) spectrometry and magnetic susceptibility(MS) via magnetometer have been increasingly used with terrain variables for digital soil mapping. However, this methodology is still emerging in many countries with tropical soils. The objective of this study was to use proximal soil sensor data associated with terrain variables at varying spatial resolutions to predict soil classes using the Random Forest(RF) algorithm. The study was conducted on a 316-ha area featuring highly variable soil classes and complex soil-landscape relationships in Minas Gerais State, Brazil. The overall accuracy and Kappa index were evaluated using soils that were classified at 118 sites, with 90 being used for modeling and 28 for validation. Digital elevation models(DEMs) were created at 5-, 10-, 20-, and 30-m resolutions using contour lines from two sources. The resulting DEMs were processed to generate 12 terrain variables. Total Fe, Ti, and SiO_(2) contents were obtained using pXRF, with MS determined via a magnetometer. Soil class prediction was performed using the RF algorithm. The quality of the soil maps improved when using only the five most important covariates and combining proximal sensor data with terrain variables at different spatial resolutions. The finest spatial resolution did not always provide the most accurate maps. The high soil complexity in the area prevented highly accurate predictions. The most important variables influencing the soil mapping were MS, Fe, and Ti. Proximal sensor data associated with terrain information were successfully used to map Brazilian soils at variable spatial resolutions. | Sérgio H.G.SILVA David C.WEINDORF Wilson M.FARIA Leandro C.PINTO Michele D.MENEZES Luiz R.G.GUILHERME Nilton CURI | 2021 | Pedosphere2021，31，4： | 1 |
| 6 | RETHINKING ACCLIMATION OF GROWTH AND MAINTENANCE RESPIRATION OF TOMATO IN ELEVATED CO_2:EFFECTS OF A SUDDEN CHANGE IN LIGHT AT DIFFERENT TEMPERATURES显示文摘Aims Changes in light and temperature are among the most common and most profound environmental perturbations. The independent effects of light and temperature on photosynthesis and respiration are well studied in single leaves, but are less well studied in whole plants. The short and long term influence of light and temperature on carbon use efficiency is also poorly understood, and is commonly modeled to remain constant over a wide range of conditions. We sought to determine the primary effects of changing light at two growth temperatures on photosynthesis, respiration, and their balance, as defined by carbon use efficiency. Methods We separated respiration into growth and maintenance components using whole-canopy gas-exchange in an elevated CO2 environment in a controlled environment, and supplemented that information with tissue analysis. Important findings Decreases in light level decreased carbon use efficiency through a reduction in the maintenance coefficient, increased the growth coefficient, and reduced partitioning of N in protein. Growth temperature did not significantly affect either maintenance or growth respiration coefficients, suggesting that long-term temperature responses can differ greatly from short-term observations. | Jonathan M.Frantz Nilton N.Cometti Marc W.van Iersel Bruce Bugbee | 2007 | 植物生态学报2007，31，4： | 1 |
| 7 | Calibration of low frequency magnetic field meters using a Helmholtz coil显示文摘 | Celso Fabricio de Melo Ricardo Luiz Araújo Leonardo Morozowski Ardjomand Nilton S. Ramos Quoirin Minoru Ikeda Alexandre Albarello Costa | 2009 | Measurement2009，，9： | 1 |
| 8 | DFTONIOM study on the effect of extra-framework aluminum on USY zeolite acidity显示文摘 | JR NILTON R cLAuDlo J A MOTA A | 2008 | Applied Catalysis A:General2008，336，： | 1 |
| 9 | Uppergastrointestinal histopathological findings in children and adoles-cents with nonulcer dyspepsia with Helicobacter pylori infection显示文摘 | Mary Assis Carvalho Nilton Carlos Machado Erika VeruskaPaiva Ortolan Maria Aparecida Marchesan Rodrigues | 2012 | Journal of Pediatric Gastroenterology and Nutrition2012，55，： | 1 |
| 10 | Accuracy of epicardial electroanatomic mapping and ablation of sustained ventricular tachycardia merged with heart CT scan in chronic Chagasic cardiomyopathy显示文摘 | Bruno Pereira Valdigem Nilton José Carneiro Silva Cristiano Oliveira Dietrich Dalmo Moreira Roberto Sasdelli Ibraim M. Pinto Claudio Cirenza Angelo Amato Vincenzo Paola | 2010 | Journal of Interventional Cardiac Electrophysiology2010，，2： | 1 |
| 11 | Impact of neonatal screening and surveillance for the TP53 R337H mutation on early detection of childhood adrenocortical tumors显示文摘 | Gislaine C Guilherme AP Nilton KF | 2013 | J Clin Oncol2013，31，20： | 1 |
| 12 | Coronary heart disease patient with implantable cardioverter desfibrilator and electrical storm submitted to ventricular tachycardia ablation显示文摘 | Nilton Jose Carneiro da Silva Bruno Pereira Valdigem | 2012 | Einstein2012，10，1： | 1 |
| 13 | Neonatal respiratory morbidity and mode of delivery at term: influence of timing of elective cesarean section显示文摘 | Lorrison JJ Rennie JM Nilton PJ | 1995 | Br J Obstet Gynaecol1995，102，2： | 1 |
| 14 | Crooked, Coiled and Crimpled are three Ly6-like proteins required for proper localization of septate junction components 显示文摘 | Nilton A Oshima K Zare F | 2010 | Development2010，137，14： | 1 |
| 15 | Upper Gastrointestinal Histopathological Findings in Children and Adolescents With Nonulcer Dyspepsia With Helicobacter pylori Infection显示文摘 | Mary Assis Carvalho Nilton Carlos Machado Erika Veruska Paiva Ortolan Maria Aparecida Marchesan Rodrigues | 2012 | Journal of Pediatric Gastroenterology and Nutrition2012，，5： | 1 |
| 16 | Effects of altitude and vegetation on small- mammal distribution in the Urucum Mountains, western Brazil显示文摘 | Nilton CC Maurlcio NG Wellington H | 2011 | J Trop Ecol2011，27，： | 1 |
| 17 | Agnuside Reduces Visceral Adipocyte Size,Improves Insulin Sensitivity and Reverses Hepatic Steatosis in Ovariectomized Rats显示文摘This study aimed to investigate the effects of agnuside(AGN),a phytoestrogen in Vitex agnus-castus,on cellular and metabolic alterations induced by ovariectomy in rats.Ovariectomized(OVX)Wistar rats were used as an animal model of postmenopausal metabolic syndrome.The visceral and subcutaneous adipocyte sizes,the peripheral insulin sensitivity and the occurrence of nonalcoholic fatty liver disease(NAFLD)and liver oxidative damage were evaluated.The results were compared with those obtained from control rats(sham-operated)and OVX rats treated daily with AGN.Obese OVX rats exhibited visceral adipocyte hypertrophy and developed glucose intolerance,hyperinsulinemia,NAFLD and dyslipidemia.AGN exerted beneficial effects on several metabolic parameters in OVX rats,including the improvement in glucose intolerance,hyperinsulinemia and NAFLD.Besides,AGN promoted a general improvement in the liver redox state.Although the reduction of the mesenteric adipocyte size is very likely to be an important mode of action of AGN,some actions of AGN could also involve the interaction with estrogen receptors. | Franciele Neves Moreno Eduardo Hideo Gilglioni Rosangela Fernandes Garcia Naiara Cristina Lucredi Sandra Mara Ferreira Nilton Almeida Brito Marcia do Nascimento Brito Emy Luiza Ishii-Iwamoto Clairce Luzia Salgueiro-Pagadigorria | 2019 | Journal of Pharmacy and Pharmacology2019，7，4： | 0 |
| 18 | Coconut Oil Reduces Visceral Adipocyte Size and Improves the Metabolic Profile of Rats Fed a High-Carbohydrate Diet显示文摘This work aimed to evaluate the effects of the food supplementation with coconut oil(CO)on biometric and metabolic parameters in an animal model of obesity.Wistar rats fed a high-carbohydrate diet(HCD rats)develop metabolic disorders very similar to those found in human metabolic syndrome,including increased adiposity,insulin resistance(IR),non-alcoholic fatty liver disease(NAFLD)and dyslipidemia.Although HCD rats had normal fasting glycemia,they developed IR as revealed by Homa-IR index and,after glucose overload,exhibited higher peaks of insulinemia and glycemia.These alterations were accompanied by a higher formation of advanced glycated end products(AGEs).The supplementation with CO improved IR,reduced AGEs formation and reverted NAFLD.These effects could be due to CO action of reducing visceral adipocyte size and take place without undesirable collateral effects on lipid profile,placing CO as an adjuvant in the treatment of the metabolic syndrome. | Valéria Schoffen Romao-Carrascoza Rosangela Fernandes Garcia Lorena Lima Garo Maria Montserrat Diaz Pedrosa Nilton de Almeida Brito Clairce Luzia Salgueiro-Pagadigorria Márcia do Nascimento Brito | 2019 | Journal of Pharmacy and Pharmacology2019，7，3： | 0 |
| 19 | Utilization of Synthetic Coarse Aggregate of Calcined Clay in Asphalt Mixtures in the Amazon Region显示文摘 | Nilton de Souza Campelo Arlene Maria Lameo da Silva Campos Aroldo Figueiredo Aragao | 2018 | Journal of Geological Resource and Engineering2018，6，1： | 0 |
| 20 | Using Graphics Processing Units to Parallelize the FDK Algorithm for Tomographic Image Reconstruction显示文摘 | Joel Sancnchez Dominguez Luiz Femando de Oliveira Nilton Alves Junior Joaquim Teixeira de Assis | 2012 | Journal of Chemistry and Chemical Engineering2012，6，8： | 0 |
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