Results 21 to 30 of about 1,804 (159)

La tabla periódica de los elementos, los isótopos y la ciencia forense

open access: yesEducación Química, 2022
El uso de isótopos ha cobrado relevancia en ciencias gracias a la aparición de espectrómetros de masas cada vez más compactos y asequibles. Las aplicaciones de los análisis isotópicos se han convertido en una herramienta rutinaria en áreas como ciencias
Miguel Ángel Martínez Carrillo   +1 more
doaj   +1 more source

Caracterización de los Aceites Esenciales del Pinus oocarpa por Cromatografia de Gases-Espectrometría De Masas (Gc-Ms) Aceites Esenciales by Gc-Ms

open access: yes, 2021
In the department of Cauca there are more than 1400 hectares of pine forests, cultivated for wood purposes. The species Pinus oocarpa among others is one of the most cultivated conifers, its foliage contains a certain amount of essential oils, which are ...
Rodrigo Andrés Sarria Villa   +2 more
semanticscholar   +1 more source

Chemical signature of colorectal cancer: case–control study for profiling the breath print

open access: yesBJS Open, Volume 4, Issue 6, Page 1189-1199, December 2020., 2020
Available screening methods for colorectal cancer have poor reliability and low patient compliance. Cancer cells produce altered metabolites, which are transported in the bloodstream and released in the alveoli; these volatile organic compounds (VOCs) can be detected in exhaled breath.
D. F. Altomare   +8 more
wiley   +1 more source

Clindamycin resistance of skin derived Staphylococcus pseudintermedius is higher in dogs with a history of antimicrobial therapy

open access: yesVeterinary Dermatology, Volume 31, Issue 4, Page 305-e75, August 2020., 2020
Background – In the Netherlands there is a lack of data regarding resistance of Staphylococcus pseudintermedius to the systemic antimicrobial drugs used for the treatment of superficial pyoderma. Objectives – To assess antimicrobial resistance, with emphasis on resistance to clindamycin and meticillin, in clinical isolates of S.
Catharina M.M. van Damme   +3 more
wiley   +1 more source

Antifungal and Antibiofilm Activity of Colombian Essential Oils against Different Candida Strains

open access: yesAntibiotics, 2023
Most Candida species are opportunistic pathogens with the ability to form biofilms, which increases their resistance to antifungal drug therapies and the host immune response. Essential oils (EOs) are an alternative for developing new antimicrobial drugs,
Jennifer Ruiz-Duran   +3 more
doaj   +1 more source

Bioaccessibility studies of Fe, Cu and Zn from Spirulina dietary supplements with different excipient composition and dosage form [PDF]

open access: yesJournal of Pharmacy & Pharmacognosy Research, 2020
Context: The cyanobacteria Spirulina is a food supplement according to its high nutritional value. However, the bioaccesibility (Bac) of nutrients like Fe, Cu and Zn from Spirulina can be affected by excipients and formulations of supplements.
María V. Principe   +5 more
doaj  

Identificación de compuestos fenólicos en extractos de almendra (Prunus dulcis) y nuez pecana (Carya illinoinensis) mediante cromatografía líquida acoplada a espectrometría de masas en tándem (HPLC-MS/MS)

open access: yesTip revista especializada en ciencias químico-biológicas, 2019
La almendra y nuez pecana son alimentos funcionales, cuyo consumo habitual puede prevenir el desarrollo de numerosas enfermedades crónico-degenerativas. Los compuestos fenólicos (CF) son algunos de los que poseen mayor actividad biológica en estos frutos
Laura A. de la Rosa   +2 more
semanticscholar   +1 more source

Vanillic Acid Restores Coenzyme Q Biosynthesis and ATP Production in Human Cells Lacking COQ6

open access: yesOxidative Medicine and Cellular Longevity, Volume 2019, Issue 1, 2019., 2019
Coenzyme Q (CoQ), a redox‐active lipid, is comprised of a quinone group and a polyisoprenoid tail. It is an electron carrier in the mitochondrial respiratory chain, a cofactor of other mitochondrial dehydrogenases, and an essential antioxidant. CoQ requires a large set of enzymes for its biosynthesis; mutations in genes encoding these proteins cause ...
Manuel J. Acosta Lopez   +18 more
wiley   +1 more source

Effect of Essential Oils on the Inhibition of Biofilm and Quorum Sensing in Salmonella enteritidis 13076 and Salmonella typhimurium 14028

open access: yesAntibiotics, 2021
The emergence of multidrug-resistant microorganisms represents a global challenge that has led to a search for new antimicrobial compounds. Essential oils (EOs) from medicinal aromatic plants are a potential alternative for conventional antibiotics.
Yuliany Guillín   +4 more
doaj   +1 more source

Young and Especially Senescent Endothelial Microvesicles Produce NADPH: The Fuel for Their Antioxidant Machinery

open access: yesOxidative Medicine and Cellular Longevity, Volume 2018, Issue 1, 2018., 2018
In a previous study, we demonstrated that endothelial microvesicles (eMVs) have a well‐developed enzymatic team involved in reactive oxygen species detoxification. In the present paper, we demonstrate that eMVs can synthesize the reducing power (NAD(P)H) that nourishes this enzymatic team, especially those eMVs derived from senescent human umbilical ...
Guillermo Bodega   +10 more
wiley   +1 more source

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