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Phenolic profile and biological potential of Endopleura uchi extracts

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Asian Pacific Journal of Tropical Medicine 2015年第11期8卷 870-878页

作者： Luis R.silva Rafaela Teixeira CICS-UBI-Centro de Investigacao em Ciencias da Saude.Universidale da Beira Interior Av.Infante D.Henrique.6201-506.Corilha.Portugal Instituto Politecnico de Castelo Branco Escola Superior de Saude Dr Lopes DiasArenido do EmpresarioCampus da Talagueira6000-767Castelo BrancaPortugal LEPABE Departamento de Engenharia QuimicaFaculdade de Engenharia.Universidade do PortoRua Dr.Roberto Friass/n4200-465 PortoPortugal REQUIMTE/Laboratorio de Farmacognosia Departamento de QuimicaFaculdade de FarmaciaUniversidade do Porto.Rua de Jorge Viterbo Ferreira228.4050-313 PortoPortugal

Objective:To improve the knowledge on the metabolite composition of Endopleura uchi bark,concerning phenolic compounds,and to evaluate some of its biological capacities for further possible exploitation in food and pharmaceutical industries associated to their healthpromoting ***:Two different extracts(infusion and hydroethanolic) were studied concerning phenolic composition and biological ***:Five compounds were determined by HPLC-DAD,being bergenin the major *** general way,infusion presents a greater richness in these *** antioxidant,***,α-glucosidase and antibacterial activity were checked by in vitro assays.A dose-dependent response was noticed against DPPH,superoxide and nitric oxide radicals,acetylcholinesterase,butyrylcholinesterase and against α-glucosidase inhibitory *** capacity of both extracts was investigated against Gram-positive and Gramnegative bacteria,being more effective against the first *** concentrations of infusion extract tested here revealed that is non-toxic for intestinal(Caco-2) cells ***:The results suggest that the extracts of Endopleura uchi may be interesting for incorporating in pharmaceutical preparations for human health,since it can suppress hyperglycaemia and inhibit cholinesteases,and or as food additive due to its antiradical and antibacterial activities.

关键词： Endopleura uchi Bark Phenolic compounds Anti-diabe

Candelilla Wax as Natural Slow-Release Matrix for Fertilizers Encapsulated by Spray Chilling

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Journal of Renewable Materials 2018年第3期6卷 226-236页

作者： Noe Navarro-Guajardo Edgar Miguel Garcia-Carrillo Carlos Espinoza-Gonzalez Ruben Tellez-Zablah Fatima Davila-Hernandez jorge Romero-Garcia Antonio Ledezma-Perez Jesus Alfonso Mercado-silva Claudia Anahi Perez Torres Nicolaza Pariona Technological Institute of Saltillo Blvd.Venustiano Carranza 2400C.P.25280SaltilloCoahuilaMéxico Research Center for Applied Chemistry Sonomimetikos Research GroupBlvd.Enrique Reyna Hermosillo 140C.P.25294SaltilloCoahuilaMéxico Research Center for Applied Chemistry National Laboratory of GrapheneBlvd.Enrique Reyna Hermosillo 140C.P.25294SaltilloCoahuilaMéxico CONACyT–Institute of Ecology A.C. Carretera antigua a Coatepec 351El HayaC.P.91070XalapaVeracruzMéxico Network for Advanced Molecular Studies Institute of Ecology A.C.Carretera antigua a Coatepec 351El HayaC.P.91070XalapaVeracruzMéxico

Efforts to improve crop yields with efficient use of fertilizers are needed to guarantee global food *** slow-release fertilizer systems(SRFs)encapsulated in biodegradable matrices are being developed to address this global *** a wide range of strategies for SRFs development,we explored a natureinspired solution based on the plant cuticle model and its function as a membrane for water and nutrient transport ***,Candelilla wax,extracted from Candelilla wild plants(Euphorbia antisyphilitica),is studied as a renewable slow-release matrix for fertilizers encapsulated by a modified spray chilling *** this process,microencapsulates containing 40 wt%of phosphorus fertilizer are obtained with distinctive sizes and chemical characteristics,presenting a slow-release *** the abovementioned features,novel insights into fertilizer release mechanisms based on plant cuticle models are discussed.

关键词： Candelilla wax encapsulation phosphorus slow-release fertilizers(SRFs) spray chilling

Risk Factors for Cervical Cancer in a Sample Comprising Three Generations of Brazilian Women

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Journal of Cancer Therapy 2017年第1期8卷 12-25页

作者： Ilce Ferreira da silva Rosalina jorge Koifman Virgilio Augusto Gomes Parreira Simone Soares Sergio Koifman Instituto Fernandes Figueira Fundacao Oswaldo Cruz Rio de Janeiro Brazil Escola Nacional de Saúde Pública Fundacao Oswaldo Cruz Rio de Janeiro Brazil Hospital do Cancer-II Instituto Nacional do Cancer Rio de Janeiro Brazil

Background: Cervical cancer is the main cause of cancer deaths in some developing countries. Age-related cervical cancer incidence has been fundamental for understanding the different stages of carcinogenesis concepts. No Brazilian study explored the environmental risk factors involved on cervical cancer, according to age groups taking 70’s sexual revolution in Brazil as reference. Aim: To determine the prevalence of epidemiological and clinical aspects related to cervical cancer development in a sample of three age groups of Brazilian women based on 70’s sexual revolution. Methods: A cross-section study was proceeded in a hospital-based cohort of women with altered Pap-test refereed to the National Cancer Institute for Colposcopy and treatment from October 2004 to May 2006. Two register nurses interviewed all patients ascertaining risk factors and clinical characteristics. Biopsy, partial ablation were used for CIN-1, and conization was the treatment for CIN-2/3. Results: From 318 women included in the study, 42.8% were 18 - 30 years old (born after 1975), 43.4% were 31 - 49 years old (born 1955-1975), and 13.8% were 50 - 68 years old (born 1936-1954). Pregnancies (OR = 1.16;CI95%: 1.01 - 1.34) and menarche under 12 years old (OR = 1.95;CI95%: 1.17 - 3.25) were independently associated to CIN2- 3/cancer in 18 - 30 age group;menopause age (OR = 1.21;CI95%: 1.04 - 1.41) and current smoking habit (OR = 1.37;CI95%: 1.10 - 1.70) were associated to CIN2- 3/cancer in 31 - 49 age group;no statistical significance was observed for 50 - 68 age group. Conclusion: Brazilian women present distinct risk for cervical cancer according to the generation they belong, when taking the Brazilian sexual revolution on 70’s as a reference.

关键词： Cervical Cancer Cross-Section Study Epidemiology Sexual Revolution Brazil

Potential Areas for Growing <i>Cyamopsis tetragonoloba</i>(L.) under Rainfed Conditions in Mexico

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Agricultural Sciences 2019年第10期10卷 1370-1380页

作者： Genovevo Ramírez Jaramillo Mónica Guadalupe Lozano-Contreras jorge H. Ramírez silva Centro de Investigación Regional Sureste del Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias (INIFAP) Mérida Mexico Campo Experimental Mocochá del Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias (INIFAP) Mocochá Mexico

Cyamopsis tetragonoloba (L.) Taub., commonly known as guar gum, is a legume of great industrial importance due to the multiple uses which can be given by galactomannans contained in the seed’s endosperm. Keeping in mind the acquiring relevance of this crop, it was considered of great importance to characterize the physical environment and the natural factors in order to locate the most suitable cultivation areas under rainfed conditions. The software Arc/View version 3.3 was used to process and analyze the information. The optimal agroclimatic requirements of guar gum were identified and each variable factor was matched with those found at ground level. A cartographic mapping was carried out to regionalize and locate the optimal and suboptimal zones. It was determined that in Mexico there is a great potential for its cultivation since it was found the existence of 900 thousand hectares with high or optimal potential and more than 200 thousand hectares of medium and sub-optimal potential where crop can be well established under rainfed conditions.

关键词： Regionalization Legume Agroindustrial Cultivation

Potential Areas for Growing <i>Gmelina arborea</i>Roxb., under Rainfed Conditions in Tabasco, Mexico

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Agricultural Sciences 2019年第9期10卷 1206-1216页

作者： Genovevo Ramírez Jaramillo Mónica Guadalupe Lozano-Contreras jorge H. Ramírez silva Centro de Investigación Regional Sureste del Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias (INIFAP) Mérida México Campo Experimental Mocochá del Centro de Investigación Regional Sureste del INIFAP Mocochá México

Gmelina arborea Roxb. (Melina), also known as white teak, is a tropical tree of great importance with multiple benefits. It is a timber species with renewal capacity and accelerated growth, highly durable and high quantity and quality pulp production, widely used in commercial programs of reforestation. In view of a possible increase of Melina areas in the state of Tabasco Mexico, information was needed in relation with the physical environment and natural factors in order to locate the most suitable areas under rainfed conditions. In this way, decision makers will be provided with a basic tool to direct and promote commercial plantations in the best suitable areas. The software Arc/View version 3.3 was used to process and analyze the information. The optimum agroclimatic requirements of Melina were identified and each variable factor was matched with those found at ground level. A cartographic mapping was carried out to regionalize and locate the optimal and suboptimal zones. It was determined that there are 191,532 ha of high potential and 542,573 ha of medium potential production areas of Melina in Tabasco, Mexico under rainfed conditions.

关键词： Regionalization Timber Species Rapid Growth

Analysis of Forging Dies Coated with Tungsten Carbide through HVOF Processing

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Journal of Mechanics Engineering and Automation 2016年第7期6卷 373-378页

作者： Vanessa Moura de Souza Angela Selau Marques jorge Antoenio Huff Alexandre da silva Rocha Luciano Kempski GES (Group of Engineering Surface) Federated University of Rio Grande do Sul Porto Alegre Brazil

Electroencephalographic coherences during emotion identification task

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World Journal of Neuroscience 2012年第4期2卷 248-253页

作者： Erzsebet Marosi Holczberger jorge Bernal Juan silva Guillermina Yanez Mario Rodríguez Belen Prieto Vicente Guerrero National University of Mexico FES IztacalaNeurosciences DepartmentMexico CityMexico

Coherence, a measure of spectral similarity, may estimate cortical coupling between two EEG signals as a function of frequency. The coherence between EEG signals from different brain areas depends on the structural connection and functional coupling between two regions. The theory of hemispheric specialization proposes left hemisphere activation to positive emotions and right one to negative emotions. Other proposal is that right hemisphere activation occurs with emotional stimuli. In the present study EEG coherences were calculated during the presentation of the International Affective Pictures to 36 healthy male university students. The subjects’ task was to determine the valence of the stimuli. Base line recording were done with subjects observing the blank monitor. Our results showed higher coherences during the emotional condition. No differences between negative and positive emotions were obtained. Neutral pictures evoked the highest coherence values. These data suggest that coherences between functionally coupled brain areas do not reflect emotional recognition of the valence of stimuli, but they are internal indicators of different mental processes such as memory, mental effort and arousal. Our findings do not support the theory of hemispheric specialization, neither the theory of right hemisphere;rather they suggest a complex activation pattern that involves mostly frontal areas in connection with the entire cortex.

关键词： EEG Coherences Emotions of Positive and Negative Valence International Affective Pictures

Formation of TiO_(2) Nanotube Layer by Anodization of Titanium in Ethylene Glycol-H_(2)O Electrolyte

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Journal of Surface Engineered Materials and Advanced Technology 2014年第3期4卷 123-130页

作者： Alain Robin Michele Bernardes de Almeida Ribeiro jorge Luiz Rosa Roberto Zenhei Nakazato Messias Borges silva Escola de Engenharia de Lorena Universidade de Sao PauloLorenaBrazil Faculdade de Engenharia de Guaratingueta Universidade Estadual PaulistaGuaratinguetaBrazil

In orthopaedics and orthodontics, the growth of nanotubes of titanium oxide on titanium implants is a promising route for improving the osseointegration. Among the fabrication routes to produce nanotubes, anodization was generally preferred due to its simplicity and low cost. TiO2 nanotubes are formed by the simultaneous anodic reaction and chemical dissolution due to the fluoride species present in the anodization bath. In this work, the formation of TiO2 nanotubes was studied in stirred ethylene glycol-H2O electrolyte (90 - 10 v/v) containing NH4F at room temperature. In order to study the effect of NH4F concentration, voltage and anodization time, and to reduce the number of experiments, a design of experiments (DOE) based on a 2k factorial design with four replicates at the center point was used. The analysis of variance (ANOVA) was used to evaluate the effects of the factors of control and their interactions on the percentage of the titanium surface coated by nanotubes. The dimensions of nanotubes (length and diameter) were also evaluated using field emission gun scanning electron microscopy. The cristallinity and phase composition of the oxide layers was investigated by X-ray diffractometry. The electrochemical behavior of as-received and anodized titanium specimens was studied in Ringer’s solution. The statistical analysis showed that fluoride concentration is the most significant factor. The best condition according to the response surface analysis is the center point (1% NH4F, 20 V, 2 h). The nanotubular oxide layers presented an amorphous structure. Electrochemical tests showed that TiO2 nanotubes coated titanium is less corrosion resistant than as-received titanium.

关键词： Nanotubes Titanium Anodization Implants

Influence of the rainfall in the content of nutrients in litter in agroforestry systems managed with burning and without burning in Amazon

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Agricultural Sciences 2013年第11期4卷 26-36页

作者： Rosecélia Moreira Da silva Castro Maria De Lourdes Pinheiro Ruivo jorge Luiz Piccinin Eraldo Ferreira Rodrigues Brazilian Company of Agricultural Research Statistical Department Belém Brasil Emilio Goeldi Pará Museum Coordination of Earth Sciences and Ecology Belém Brasil Federal University of Rural Amazonia Institute Sciences Agricultural Belém Brasil

This study evaluated the nutrient content of the litter, testing different treatments with burning and no burning, of the vegetation, to identify which one provides better efficiency in operation and production of nutrients in different seasonal conditions. The study area is located on the property of the family farmer, initially selected by a diagnosis socioeconomic, community Benjamin Constant, in northeastern Para. Litter was collected during two periods: dry season (November) and rainy (March) in 2009. For the collection of litter samples, we used collectors measuring (0.25 × 0.25 m2), which were placed directly on the soil surface. The collected material was stored in paper bags and taken to the laboratory for Chemical Analysis of the Brazilian Agricultural Research Corporation (EMBRAPA), which was determined by analyses of macronutrients (N, P, K, Ca, Mg, Na) and micronutrients (Fe, Cu, Mn, Zn). The highest concentrations of macronutrients were found in N for agroforestry systems with and without burning in two seasons (wet and dry). All macronutrients showed influence of seasonality, which was verified by the wide variation in nutritional behavior. The decreasing concentration of nutrients was presented N > Ca > Mg > Na > K > P in agroforestry system with burning, with maximum values of all nutrients in the rainy season, and N, P, K, Ca, Na in higher concentrations in agroforestry system without burning, and showed only the Mg peak in agroforestry system with burning. The behavior of the concentration of nutrients was opposite to that observed one, for all elements analyzed showed a reduction in the concentrations of nutrients in the dry season. The decreasing concentration of nutrients was presented Fe > Mn > Zn > Cu.

关键词： Forest Management Ecosystem Seasonality Litterfall