Skip to main content

Comparative Evaluation of Organic and Conventional Vegetables on Physical and Chemical Parameters and Antioxidant Activity | Chapter 13 | Current Trends in Food Science Vol. 1

The objective of this research was to perform a quantitative and comparative analysis of physical and chemical characteristics and antioxidant activity in organic and conventional carrot (Daucus carota), green pepper (Capsicum annuum) and lettuce (Lactuca sativa). Five representative samples of each conventional vegetables, certified organic and non-certified organic vegetables were gotten from farms and supermarkets in the city of Rio de Janeiro, Brazil. All samples were underwent the following analyzes: reducing sugars, total sugars, ºBrix, vitamin C, density, acidity, antioxidant activity and phenolic compounds content. Data were submitted to analysis of variance (ANOVA) and the means compared by Tukey's test at 5% probability. The result shows that the organic carrot showed higher acidity (0.11 g% citric acid) and total sugar (5.68 g%) than those found in standard samples and certified organic ones (p<0.05). Regarding the density analysis and total soluble solids, there was no statistical difference between carrots, green peppers and lettuce from all types (p>0.05). It was observed that the vitamin C levels in carrot samples levels had no significant difference between the different forms of production (p>0.05). Conventional lettuce and certified organic pepper showed higher vitamin C than the other samples (p<0.05). The antioxidant activity of the samples was analyzed by the capacity to reduce the DPPH (1,1-diphenyl-2-picryl- hydrazyl) radical, in which carrot and conventional pepper showed lower antioxidant activity (p<0.05) when compared to organic samples. There were no significant differences among the different forms of production in the lettuce samples (p>0.05). Carrot and green pepper, with seal certification or not, showed higher capacity to reduce DPPH than the conventional ones, this suggests that the form of cultivation has a direct relationship with the nutritional values of the vegetables.

Author(s) Details

Fernanda de Oliveira Pereira
Nutritional Biochemistry Core, Laboratory of Functional Food and Biotechnology, Department of Food Science, University Federal of Rio de Janeiro State, UNIRIO, Rio de Janeiro, Brazil.

Renata dos Santos Pereira
Nutritional Biochemistry Core, Laboratory of Functional Food and Biotechnology, Department of Food Science, University Federal of Rio de Janeiro State, UNIRIO, Rio de Janeiro, Brazil.

Lana de Souza Rosa
Nutritional Biochemistry Core, Laboratory of Functional Food and Biotechnology, Department of Food Science, University Federal of Rio de Janeiro State, UNIRIO, Rio de Janeiro, Brazil.

Dr. Anderson Junger Teodoro
Nutritional Biochemistry Core, Laboratory of Functional Food and Biotechnology, Department of Food Science, University Federal of Rio de Janeiro State, UNIRIO, Rio de Janeiro, Brazil.

Read full article: http://bp.bookpi.org/index.php/bpi/catalog/view/79/1082/768-1
View Volume: https://doi.org/10.9734/bpi/ctfs/v1
Labels:

Comments

Post a Comment

Popular posts from this blog

Greening Regional Airports: A Vision for Carbon Neutral Infrastructure | Chapter 12 | Contemporary Perspective on Science, Technology and Research Vol. 3

 This study provides an overview of the energy demand of a regional airport, divided into individual time horizons. The electrification of aircraft systems raises the question of whether airports will be among the largest electricity consumers in our infrastructure in the future. Sustainability and especially emission reductions are significant challenges for airports that are currently being addressed. The Clean Sky 2 project GENESIS addresses the environmental sustainability of hybrid-electric 50-passenger aircraft systems in a life cycle perspective to support the development of a technology roadmap for the transition to sustainable and competitive electric aircraft systems. This article originates from the GENESIS research and describes various options for ground power supply at a regional airport. Potential solutions for airport infrastructure with a short (2030), medium (2040), and long (2050) time horizon are proposed. In addition to the environmental and conservation benefi...
Post a Comment
Read more

Risk Factors for Postpartum Psychiatric Disorders. A Review of the Literature | Chapter 8 | New Visions in Medicine and Medical Science Vol. 4

  Objective: The aim of this study was to explore the risk factors for the development of postpartum psychiatric disorders through international literature. Materials and Methods: Throughout many articles in PubMed, Google scholar and PsycInfo, a great amount of recent data was gathered to identify the disorders that are most common as well as their risk factors. Results: After childbirth, most commonly women experience postpartum depression, anxiety disorders, post-traumatic stress disorder and postpartum psychosis. All the disorders have many similar risk-factors with the main one being preexisting psychiatric disorder and many similar symptoms too. Conclusions: Women after childbirth are at risk of experience many psychiatric disorders, such as postpartum distress, postpartum post traumatic stress disorder and even more rarely postpartum psychosis. It is important to provide comprehensive support to ensure the well-being of both the mother and the infant and this will b...
Post a Comment
Read more

Alkali Element Modification of Glucose Molecules as a Method to Dissolve Cancer Cells | Chapter 12 | New Visions in Medicine and Medical Science Vol. 4

  The present study highlights about alkali element modification of glucose molecules as a method to dissolve cancer cells. The central regulation of the mechanisms governing cell proliferation has little effect on cancer cells. Cancer cells are entirely independent of the central command and divide and proliferate on their own, making it challenging to activate their response mechanism. Precisely, this is the reason why they are at risk to the health of humans and/or any biological entities. Instead of trying to reconnect the central command of the growth control mechanism to cancer cells that are already out of the range, we present a method of using the cancer cell’s own irresponsive and uncontrolled growth mechanism to their disadvantage and destroy the cancer cells. We found that this is achievable in an atomic/molecular level study of the glucose molecule, which is the primary food source used for growth and energy generation by all cells in the body, including the cancer cel...
Post a Comment
Read more