This page has only limited features, please log in for full access.

Unclaimed
Maria Genoveva Granda-Albuja
Laboratorios de Investigacion, Universidad de Las Americas, Ecuador

Basic Info

Basic Info is private.

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Other
Published: 16 June 2020
Reads 0
Downloads 0

Since the beginning of SARS-CoV-2 pandemic studies on viral shedding have reported that this virus is excreted in feces in most patients. High viral loads are found at the sewage pipeline or at the entrance of wastewater treatment plants from cities where the number of COVID-19 cases are significant. In Quito (Ecuador) as in many other cities worldwide, wastewater is directly discharged into natural waters. The aim of this study was to evaluate SARS-CoV-2 presence in urban streams from a low sanitation context. Three river locations along the urban rivers of Quito were sampled on the 5th of June during a peak of COVID-19 cases. River samples were evaluated for water quality parameters and afterwards, concentrated for viral analysis using skimmed milk flocculation method. The viral concentrates were quantified for SARS-CoV-2 (N1 and N2 genes) and Human Adenovirus as a human viral indicator. The results showed that SARS-CoV-2 was detected for both target genes in all samples analyzed in a range of 2,91E+05 to 3,19E+06 GC/L for N1 and from 2,07E+05 to 2,22E+06 GC/L for N2. The high values detected in natural waters from a low sanitation region have several implications in health and ecology that should be further assessed.

ACS Style

Laura Guerrero-Latorre; Isabel Ballesteros; Irina M. Villacrés; Maria Genoveva Granda-Albuja; Byron P. Freire; Blanca Ríos-Touma. First SARS-CoV-2 detection in river water: implications in low sanitation countries. 2020, 1 .

AMA Style

Laura Guerrero-Latorre, Isabel Ballesteros, Irina M. Villacrés, Maria Genoveva Granda-Albuja, Byron P. Freire, Blanca Ríos-Touma. First SARS-CoV-2 detection in river water: implications in low sanitation countries. . 2020; ():1.

Chicago/Turabian Style

Laura Guerrero-Latorre; Isabel Ballesteros; Irina M. Villacrés; Maria Genoveva Granda-Albuja; Byron P. Freire; Blanca Ríos-Touma. 2020. "First SARS-CoV-2 detection in river water: implications in low sanitation countries." , no. : 1.

Journal article
Published: 27 January 2020 in Antioxidants
Reads 0
Downloads 0

Pechiche fruits (Vitex cymosa Berteo ex Speng) from Ecuador were studied to determine their phenolic acid profile, nutrient minerals and capacity to protect primary human dermal fibroblasts (HDFa) against oxidative-induced damage. Up to five phenolic acids were identified, with homovanillic acid as the main one. Vitamin C, β-carotene and lutein were also determined. Phosphorus and potassium were the main macrominerals, while iron was the principal micromineral. HDFa were preincubated with a crude pechiche extract (PCext) and then subjected to oxidative stress. The activity of five antioxidant enzymes, intracellular reactive oxygen species (ROS) and ATP levels and lipid peroxidation and protein oxidation were used as markers of oxidative damage. Preincubation with PCext for 24 h allowed for the significant reduction of intracellular ROS levels, improved the intracellular ATP levels and protected lipids and proteins against oxidative damage (p < 0.05). Additionally, preincubation with PCext was also able to significantly (p < 0.05) improve the activity of the antioxidant enzymes catalase, superoxide dismutase, glutathione peroxidase, glutathione reductase and glutathione transferase, compared to the stressed group without pretreatment. The results obtained in this study suggest the potential of pechiche as a source of bioactive compounds, as well as its beneficial effect against oxidative stress.

ACS Style

Mabel Guevara; Luis A Valdes Silverio; María G. Granda-Albuja; Gabriel Iturralde; Tatiana Jaramillo-Vivanco; Francesca Giampieri; Celestino Santos-Buelga; Ana M. González-Paramás; Maurizio Battino; José M. Álvarez-Suarez. Pechiche (Vitex cymosa Berteo ex Speng), a Nontraditional Fruit from Ecuador, is a Dietary Source of Phenolic Acids and Nutrient Minerals, in Addition to Efficiently Counteracting the Oxidative-Induced Damage in Human Dermal Fibroblasts. Antioxidants 2020, 9, 109 .

AMA Style

Mabel Guevara, Luis A Valdes Silverio, María G. Granda-Albuja, Gabriel Iturralde, Tatiana Jaramillo-Vivanco, Francesca Giampieri, Celestino Santos-Buelga, Ana M. González-Paramás, Maurizio Battino, José M. Álvarez-Suarez. Pechiche (Vitex cymosa Berteo ex Speng), a Nontraditional Fruit from Ecuador, is a Dietary Source of Phenolic Acids and Nutrient Minerals, in Addition to Efficiently Counteracting the Oxidative-Induced Damage in Human Dermal Fibroblasts. Antioxidants. 2020; 9 (2):109.

Chicago/Turabian Style

Mabel Guevara; Luis A Valdes Silverio; María G. Granda-Albuja; Gabriel Iturralde; Tatiana Jaramillo-Vivanco; Francesca Giampieri; Celestino Santos-Buelga; Ana M. González-Paramás; Maurizio Battino; José M. Álvarez-Suarez. 2020. "Pechiche (Vitex cymosa Berteo ex Speng), a Nontraditional Fruit from Ecuador, is a Dietary Source of Phenolic Acids and Nutrient Minerals, in Addition to Efficiently Counteracting the Oxidative-Induced Damage in Human Dermal Fibroblasts." Antioxidants 9, no. 2: 109.

Journal article
Published: 10 September 2019 in Antioxidants
Reads 0
Downloads 0

We studied 19 different tropical fruits traditionally consumed in the coastal lowlands of Ecuador to determine their chemical composition and antioxidant activity. Carambola (Averrhoa carambola L.) had the highest total phenolic, flavonoid, and total antioxidant capacity values, whereas guava fruits (Psidium guajava L.) had the highest vitamin C values. The main organic acids identified were lactic, citric, and acetic acids, and the highest amount of lactic acid was found in soursop fruits (Annona muricata L.), whereas Ecuadorian ivory palm (Phytelephas aequatorialis Spruce) and guava fruits had the highest acetic acid content. Guava also had the highest citric acid content; the highest concentration of oxalic acid was found in carambola. In terms of sugar content, giant granadilla (Passiflora quadrangularis L.) had the highest values of glucose, and red mombin (Spondias mombin L.) had the largest values for fructose and guava for sucrose. Chili pepper (Capsicum chinense Jacq) proved to be the main source of carotenoids, lutein, and β-carotene, anthocyanins, and vitamin C. The results here increase our knowledge regarding the composition of the main fruits consumed on the west coast of Ecuador to facilitate recommendations as potential sources of health-promoting compounds.

ACS Style

Mabel Guevara; Eduardo Tejera; María G. Granda-Albuja; Gabriel Iturralde; Maribel Chisaguano-Tonato; Silvana Granda-Albuja; Tatiana Jaramillo-Vivanco; Francesca Giampieri; Maurizio Battino; José M. Alvarez-Suarez. Chemical Composition and Antioxidant Activity of the Main Fruits Consumed in the Western Coastal Region of Ecuador as a Source of Health-Promoting Compounds. Antioxidants 2019, 8, 387 .

AMA Style

Mabel Guevara, Eduardo Tejera, María G. Granda-Albuja, Gabriel Iturralde, Maribel Chisaguano-Tonato, Silvana Granda-Albuja, Tatiana Jaramillo-Vivanco, Francesca Giampieri, Maurizio Battino, José M. Alvarez-Suarez. Chemical Composition and Antioxidant Activity of the Main Fruits Consumed in the Western Coastal Region of Ecuador as a Source of Health-Promoting Compounds. Antioxidants. 2019; 8 (9):387.

Chicago/Turabian Style

Mabel Guevara; Eduardo Tejera; María G. Granda-Albuja; Gabriel Iturralde; Maribel Chisaguano-Tonato; Silvana Granda-Albuja; Tatiana Jaramillo-Vivanco; Francesca Giampieri; Maurizio Battino; José M. Alvarez-Suarez. 2019. "Chemical Composition and Antioxidant Activity of the Main Fruits Consumed in the Western Coastal Region of Ecuador as a Source of Health-Promoting Compounds." Antioxidants 8, no. 9: 387.