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1
artículo
Publicado 2024
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El objetivo de este estudio es conocer el efecto de los abonos orgánicos sobre el crecimiento y la productividad del maíz amarillo y las propiedades del suelo salino. El experimento se llevó a cabo en la granja de Sayeed Habib Al-Khatib en la ciudad de Numaniyah a 45 km al oeste de la ciudad de Kut durante la temporada agrícola de 2024. Para estudiar 3 tipos de residuos orgánicos: vacas, F1, ovejas F2, y aves de corral F3, a continuación, una mezcla de ellos, (F1 + F2), (F1 + F3), (F2 + F3), para conocer el efecto de estos fertilizantes en el crecimiento y la producción de plantas de maíz y las propiedades del suelo. La tierra se aró, se trituró y se mezcló, después se añadieron los residuos al suelo con la capa superficial 2 t.ha-1, a continuación se plantaron los granos de maíz y se empezó a regar hasta el final del experimento. Las operaciones agrícolas y el servicio ...
2
artículo
Publicado 2016
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Camu camu is the fruit that has the highest content of vitamin C, which is 100 times higher than the lemon. This tropical fruit is native to the Amazon region and it is mainly distributed in Bolivia, Brazil, Colombia, Ecuador, Peru and Venezuela. In its composition, it has different bioactive compounds such as carotenoids, antioxidants, vitamins and phenolic compounds such as anthocyanins and tannins that give it the characteristics of a functional food. It also has beneficial properties on the health of those who consume it, because it is considered a powerful antioxidant, anti-inflammatory and antimicrobial; it is also a great ally against cardiovascular diseases and for people suffering from obesity. Research shows a positive effect for the treatment of early stages of diabetes, as well as providing other benefits. This review work aimed to study the literature regarding camu-camu as ...
3
artículo
Publicado 2016
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Camu camu is the fruit that has the highest content of vitamin C, which is 100 times higher than the lemon. This tropical fruit is native to the Amazon region and it is mainly distributed in Bolivia, Brazil, Colombia, Ecuador, Peru and Venezuela. In its composition, it has different bioactive compounds such as carotenoids, antioxidants, vitamins and phenolic compounds such as anthocyanins and tannins that give it the characteristics of a functional food. It also has beneficial properties on the health of those who consume it, because it is considered a powerful antioxidant, anti-inflammatory and antimicrobial; it is also a great ally against cardiovascular diseases and for people suffering from obesity. Research shows a positive effect for the treatment of early stages of diabetes, as well as providing other benefits. This review work aimed to study the literature regarding camu-camu as ...
4
artículo
Publicado 2025
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The dry forests of northern Peru are home to extensive populations of algarrobo (Neltuma spp.). Its fruit serves as feed for goats and is used in various agro-industrial products. However, the nutritional quality can be influenced by the physicochemical properties of the soil and vegetation coverage. The objective of this study was to understand and predict the concentration of protein and ether extracts of carob and evaluate its relationship with soil properties and vegetation indices. Principal component analysis (PCA) and correlation analyses were conducted. The prediction of protein and ether extract was carried out using the Eureqa-Formulize software 1.24.0. In the PCA, protein showed a positive relationship with ash and ether extract but a negative relationship with moisture. Likewise, moderate correlations were observed between protein and ash content (0.51). Protein also showed p...
5
artículo
Publicado 2024
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The impact of temperature and air velocity on the drying of pituca (Colocasia esculenta) sheets was investigated. The samples, 1.5 mm thick, were subjected to a tray dryer at three temperatures (45, 50 and 55 °C) and three air velocities (2.5; 3.0 and 3.5 m/s). After grinding the dried sheets, the physicochemical, microbiological and sensory properties of the pituca flour were analyzed. The findings indicated that the drying curves conformed to the exponential model proposed by Herdenson and Pabis, with a coefficient of determination greater than 96%. The optimum treatment, T9, used a temperature of 55 °C and a speed of 3.5 m/s. It showed a critical moisture of 1.53 g/g dry pituca, an equilibrium moisture of 0.9 g/g dry pituca, and a critical time of 20 minutes. Values for ash, moisture, mesophilic aerobes, molds and yeasts were recorded at 3.37%, 8.04%, 9.90x103 CFU/g, and 2.40x103 ...
6
artículo
Publicado 2020
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This study was carried out in the main Escarcha variety peach producing area in the state of Tlaxcala, Mexico. Soil parameters were evaluated in plots with different management and some quality criteria in the fruit, to later relate them through a Principal Component Analysis (PCA). The results of the soil characterization evidenced a predominance of the sand fraction, low concentration of organic matter and total N, and few exchange sites. Yields of 10.88 to 11.66 t ha-1 were obtained. Through the PCA it was observed that the predictor variables in the case of the soil, in the main component one (CP1) were organic matter, organic carbon, total nitrogen and phosphorus; in CP2 were the apparent density, porosity, pH and the humification index. In the case of the fruit, in CP1 were weight, equatorial diameter, maturity index and number of fruits, and in CP2 were total titratable acidity an...
7
artículo
Publicado 2020
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This study was carried out in the main Escarcha variety peach producing area in the state of Tlaxcala, Mexico. Soil parameters were evaluated in plots with different management and some quality criteria in the fruit, to later relate them through a Principal Component Analysis (PCA). The results of the soil characterization evidenced a predominance of the sand fraction, low concentration of organic matter and total N, and few exchange sites. Yields of 10.88 to 11.66 t ha-1 were obtained. Through the PCA it was observed that the predictor variables in the case of the soil, in the main component one (CP1) were organic matter, organic carbon, total nitrogen and phosphorus; in CP2 were the apparent density, porosity, pH and the humification index. In the case of the fruit, in CP1 were weight, equatorial diameter, maturity index and number of fruits, and in CP2 were total titratable acidity an...
8
artículo
Publicado 2022
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Objective: To evaluate the psychometric properties of the Mexican version of the Parental-Caregivers Perceptions Questionnaire. Materials and methods: A psychometric scale validation study developed in Poza Rica (Veracruz-México) that cross-culturally adapted the Parental-Caregivers Perceptions Questionnaire from Peruvian Spanish to Mexican slang. Face validity was evaluated through the judgment of experts who rated the clarity, relevance and importance of the questions. The sample was 241 parents and caregivers. Reliability was assessed using Cronbach's alpha and McDonald's Omega, internal consistency, and discriminant power using Spearman's correlation coefficient, and content validity was assessed using Exploratory Factor Analysis. Results: The scale showed an α=0.81 and ω=0.8. The matrix tests presented a Kaiser-Meyer-Olkin index=0.739 (p=0.001); Bartlett's test (p=0.001). Various...
9
artículo
Publicado 2022
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Objective: To evaluate the psychometric properties of the Mexican version of the Parental-Caregivers Perceptions Questionnaire. Materials and methods: A psychometric scale validation study developed in Poza Rica (Veracruz-México) that cross-culturally adapted the Parental-Caregivers Perceptions Questionnaire from Peruvian Spanish to Mexican slang. Face validity was evaluated through the judgment of experts who rated the clarity, relevance and importance of the questions. The sample was 241 parents and caregivers. Reliability was assessed using Cronbach's alpha and McDonald's Omega, internal consistency, and discriminant power using Spearman's correlation coefficient, and content validity was assessed using Exploratory Factor Analysis. Results: The scale showed an α=0.81 and ω=0.8. The matrix tests presented a Kaiser-Meyer-Olkin index=0.739 (p=0.001); Bartlett's test (p=0.001). Various...
10
artículo
Publicado 2018
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The authors are grateful to the: • São Paulo Research Foundation (FAPESP, Brazil) for funding the projects n 2016/10732-7 and 2016/18052-5; • National Council for Scientific and Technological Development (CNPq, Brazil) for funding the project n 401004/2014-7 and the productivity grant of P.E.D. Augusto (306557/2017-7); • Coordination for the Improvement of Higher Education Personnel (CAPES, Brazil) for the APS Alexandre Ph.D scholarship and her sandwich staying at the Universidade Católica Portuguesa (88881.132287/2016-01); • Cienciactiva from the “Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica” (CONCYTEC, Peru) for the AC Miano Ph.D. scholarship (Contract 272-2015-FONDECYT); • Fundação para a Ciência e a Tecnologia (FCT, Portugal), for the JF Fundo (SFRH/BPD/109519/2015), FA Miller (SFRH/ BPD/65041/2009) and TRS Brandão (SFRH/BPD/101179/2014) Pos...
11
artículo
The anatomy of the unopened spear leaf of the chambira palm (Astrocaryum chambira), from which chambira fiber is extracted, is described and compared with that of three species (Astrocaryum jauari, occasionally used for fiber extraction, A. standleyanum and A. perangustatum, which do not provide any fiber). Chambira fiber consists of non-vascular fiber strands closely adhered to the adaxial hypodermis; this forms a compact unit, which makes it easy to separate from the rest of the lamina. A similar arrangement is found in Astrocaryum jauari; however, the non-vascular fiber cells are shorter and fewer per strand. Differences in leaf anatomy of Astrocaryum standleyanum and A. perangustatum may explain why fiber is not extracted: Astrocaryum standleyanum has a dense row of non-vascular fibrous strands under the adaxial hypodermis similar to Astrocaryum chambira but the large size of non-vas...
12
artículo
The anatomy of the unopened spear leaf of the chambira palm (Astrocaryum chambira), from which chambira fiber is extracted, is described and compared with that of three species (Astrocaryum jauari, occasionally used for fiber extraction, A. standleyanum and A. perangustatum, which do not provide any fiber). Chambira fiber consists of non-vascular fiber strands closely adhered to the adaxial hypodermis; this forms a compact unit, which makes it easy to separate from the rest of the lamina. A similar arrangement is found in Astrocaryum jauari; however, the non-vascular fiber cells are shorter and fewer per strand. Differences in leaf anatomy of Astrocaryum standleyanum and A. perangustatum may explain why fiber is not extracted: Astrocaryum standleyanum has a dense row of non-vascular fibrous strands under the adaxial hypodermis similar to Astrocaryum chambira but the large size of non-vas...
13
artículo
Publicado 2017
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Revolutions are like Saturn, which devour their own children; a saying designed in correspondence with one of the most merciless gods of roman mithology, where no revolution was known without destruction or violence, seeking a change through violence; apart from taking victims opponents, it took the same revolutionaries when their own violence unleashed would turn against themselves.Those revolutions, which are frozen in the past for historical records, are today being replaced by one that increases in validity and authenticity. A Revolution that does not need to destroy to transform lives, to revive hopes and to transmit enthusiasm to its most fascinated followers, and even to those who still maintain themselves skeptics. On the contrary, it needs to create, invent and innovate in order to achieve its real and original mission.Creations with identity and defense guaranteed by a r...
14
artículo
Publicado 2022
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L Propolis is a product derived from bees and consists of a dark-colored sticky material obtained from different plants and mixed with wax, which is used to protect beehives. It has therapeutic qualities, so the objective of this study was to carry out a bibliographic review of the properties and uses of propolis in dentistry.Methodology: A literature search was carried out on the applications of propolis in dentistry in the databases PubMed, Imbiomed, Medigraphic, SciELO and Google Scholar in the period from March 2010 to March 2020, using the keywords: propolis, characteristics, properties and uses of propolis.Results. Thirty-nine articles reporting results in relation to its properties and uses in dentistry were included. The main properties: antimicrobial, anti-inflammatory, immunomodulatory and healing, basically attributed to the bioactive compound Flavonoids. Propolis is used i...
15
artículo
Publicado 2025
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The purpose of this study was to translate the Bedtime Procrastination Scale (BPS) into Spanish and to evaluate its psychometric properties. A sample of 419 students from three Peruvian universities participated in the study. Confirmatory factor analysis was conducted to evaluate the original model of the scale, which initially showed poor fit indices. Improved fit indices were obtained after removing reverse-scored item, χ²(5) = 9.240, CFI = .998, RMSEA = .045, TLI = .997, and SRMR = .013. The internal consistency of the scale, examined using the omega coefficient, was found to be satisfactory (ω = .86). Moreover, measurement invariance analysis supported gender invariance, indicating that the scale functions equivalently across male and female participants. Additionally, convergent validity was assessed by examining the correlations between the BPS and insomnia, as measured by the A...
16
artículo
Publicado 2023
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The development of transportation infrastructure plays a fundamental role in promoting tourism activities by enhancing the accessibility to various destinations. The quality of paved roads particularly influences the flow of trade and tourism. The research focused on evaluating the influence of the addition of metallurgical slag (MS) to the mechanical properties of flexible pavements. A sample of 60 briquettes underwent testing using the Marshall method with different levels of MS addition: 5 %, 8 %, 12 %, and 15 %. The results revealed that a combination of 4.5 % asphalt content (AC) and 12 % MS proved to be suitable in terms of stability, reaching a value of 1540.3 kg, as well as an average flow of 2.73 cm. Consequently, it is concluded that the inclusion of MS enhances the mechanical properties of the asphalt layer, suggesting that this material could be used in the design of mixtures...
17
artículo
Publicado 2024
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The present study aims to identify the psychometric properties of the Positive Emotions Questionnaire for girls and boys in the Mexican population. The sample was selected non-randomly and consisted of 668 girls and boys, 4th, 5th and 6th grade elementary school students in public and private schools, whose ages ranged from 8 to 14 years old (M = 10.38; DE = 1.32); 55 % were from the Guadalajara metropolitan area (52 % males and 48% females) and 45 % from the southern area of the state of Jalisco (43 % males and 57 % females). The results obtained from the factorial analysis show adequate fit indexes and the interfactor correlations were moderate, indicating that there is no overlapping of content between the dimensions. The results are discussed, insisting on the creation of promotion, prevention or intervention programs that contribute to the well-being and quality of life of the Mexic...
18
artículo
Publicado 2024
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The present study aims to identify the psychometric properties of the Positive Emotions Questionnaire for girls and boys in the Mexican population. The sample was selected non-randomly and consisted of 668 girls and boys, 4th, 5th and 6th grade elementary school students in public and private schools, whose ages ranged from 8 to 14 years old (M = 10.38; DE = 1.32); 55 % were from the Guadalajara metropolitan area (52 % males and 48% females) and 45 % from the southern area of the state of Jalisco (43 % males and 57 % females). The results obtained from the factorial analysis show adequate fit indexes and the interfactor correlations were moderate, indicating that there is no overlapping of content between the dimensions. The results are discussed, insisting on the creation of promotion, prevention or intervention programs that contribute to the well-being and quality of life of the Mexic...
19
artículo
The study aimed to explore the psychometric properties of research competency scales published in the scientific literature in seven databases: Scopus, Web Of Science, ERIC, Embase, EBSCO, PubMed and SciELO between 2014 and June 2023. Thirteen papers were systematized, where 11 scales were found that measured content validity using indexes such as the S-CVI, Aiken's V and item-test correlations. Similarly, the results of the exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) presented adequate fit indices such as CFI, GFI, TLI, SRMR and RMSEA, which validated the factor structure. Reliability was mostly evaluated through Cronbach's Alpha coefficient, yielding high and consistent values. In addition, coefficients such as McDonald's Omega, ordinal Omega, Guttman and Spearman Brown have been used, all reflecting a value above .70 and internal consistency in the measure...
20
artículo
Publicado 2021
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Purpose. This paper aims to offer an empirical study of the impact of institutional quality on the banking system risk and credit risk. Design/methodology/approach. Applying cross-sectional dependent tests and stationary tests to check the property of our sample, the panel corrected standard errors model is recruited as the main estimator, while feasible generalized least squares, pool ordinary least squares (OLS), robust pool OLS and other estimators are used as a robustness check for an unbalanced panel data for 56 economies divided into three subsamples between 2002 and 2015. Findings. The empirical results show several significant contributions. First, an improvement in institutional quality is an important factor to reduce the banking system risk. This effect of the institutions is less important in well-capitalized, highly profitable and in high-economic growth countries. This effe...
