Examinando por Materia "Plants"

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Acceso abierto
Analysis of the content of arsenic, lead, and cadmium in roots and leafy vegetables from the wholesale market of Lima, Peru - 2023
(Universidad Privada Norbert Wiener, 2023-05-25) Gonza Togas, Yuli; Espinoza Rado, Erika Paola
Objective: To evaluate the content of heavy metals in roots and leafy vegetables from the wholesale market of Lima in 2023. Methodology: A quantitative, analytical, and cross-sectional approach was used. Samples of potato, carrot, lettuce, and spinach (500g each) were collected from the wholesale market in Lima, Peru, in 2023. AOAC analysis methods were applied for each heavy metal. A 95% confidence level was used to determine whether the concentrations of contaminants exceeded the established limits. The Wilcoxon non-parametric test was used with a p-value of 0 and a significance level of 5%. Results: The statistical test confirmed that the presence of heavy metals was below the established limits. The p-value was 0 at a 5% significance level, confirming that the median concentrations of arsenic, lead, and cadmium in the tested vegetables were lower than the maximum allowed by regulations. Conclusions: The analysis of arsenic, lead, and cadmium content in the roots and leafy vegetables from the wholesale market of Lima, Peru, in 2023 showed that the concentrations were lower than the national regulatory limits. Further studies should be conducted in other areas or in soils contaminated by mining activity, and it is recommended to acquire food from batches sold at the point of origin for comparison.
Acceso abierto
Identification of ciliate and flagellate parasites in raw vegetables in the Chacra Colorada market of the Breña district – Lima 2023
(Universidad Privada Norbert Wiener, 2024-07-14) Amache Amache, Dalmecia; Astete Medrano, Delia Jessica
Introduction: Vegetables sold in our country generally lack any sanitary control, except for those distributed by supermarket chains. Generally, vegetables are bagged or packaged in almost any way, and contact with soil is almost inevitable, with no control over it. Therefore, we believe that vegetables such as lettuce, spinach, carrots, and tomatoes may harbor a significant parasitic load, potentially infectious. Objectives: General objective: To identify parasites in vegetables from the Chacra Colorada market in Breña. Secondary objectives: 1. Identify ciliates in vegetables from the Chacra Colorada market in Breña. 2. Identify flagellates in vegetables from the Chacra Colorada market in Breña. Results: 48 samples (vegetables from the Breña market) were taken. Of these, 30 (62.5%) were positive for the presence of human-pathogenic protists. The most frequent protists were Giardia lamblia and Endolimax nana. Lettuce was the most contaminated in our study. Conclusions: Giardia lamblia is the most abundant protist in the vegetable samples. Lettuce and spinach are the most contaminated. 62.5% of the samples were positive for human-pathogenic parasites.
Acceso abierto
Nutritional composition, antioxidant capacity and antibacterial activity of the wild food plant Peperomia Crystallina Ruiz & Pav. (Limonyuyu) Peru, 2022
(Universidad Privada Norbert Wiener, 2023-11-22) Chavez Cabrera, Nain Abigail; Bravo Araujo, Gloria Tula
Determine the nutritional composition, antioxidant capacity and antibacterial activity of the wild food plant Peperomia crystallina Ruiz & Pav. (Limonyuyu). Methodology: Applied research, with a mixed approach. Quantitative nutritional composition in original plant methods: MS-INN calculation Collazos 1993; AOAC, 2nd Edition 2019; Differences MS-INN Collazos 1993; Official Methods of Food Analysis: A. Madrid, Vicente 1994; NTP 1980 (Revised 2011); NTP 1999 (Revised 2019); qualitative nutritional composition of the hydroalcoholic extract: the Molis reagent, Fehling A and Fehling B for carbohydrates, proteins with Ninhydrin. The antioxidant capacity of the original plant method of Arnao, Marino and Cano 2001; Swain T, Y Hillis 1959; hydroalcoholic extract method 2,2-Diphenyl-1-Picrylhydrazyl (DPPH). Antibacterial activity of the hydroalcoholic extract on Escherichia coli ATCC 25922 was compared with the Mc turbometric scale. Farland, and was estimated by visual inspection. Results: Limonyuyu has proteins, carbohydrates, calories, vitamin C, iron, magnesium, potassium, sodium, crude fiber, moisture and ash. The hydroalcoholic extracts have a high antioxidant capacity at a concentration of 100µg that inhibited 24.577% of the DPPH radical with p=0.00001488 and high antibacterial activity on Escherichia coli ATCC 25922 with inhibition zones > 14.99 mm for the hydroalcoholic extracts at 25%, 50%. , 75% with a p=0.01563; p=0.000000003716; p=0.00000000001465. Conclusion: Peperomia crystallina Ruiz & Pav. (Limonyuyu) demonstrated to have a varied nutritional composition, antioxidant capacity against DPPH and antibacterial activity against Escherichia coli ATCC 25922.