Quantitative 1H-NMR assay from sputum samples for a rapid detection of pyrazinamide resistance in Mycobacterium tuberculosisLopez, J. M., Zimic, M., Vallejos, K., Sevilla, D., Quispe-Carbajal, M., Roncal, E., Rodríguez, J., Rodríguez, J., Antiparra, R., Arteaga, H., Gilman, R., Maruenda, H., Sheen, P. JCM (accepted). Pyrazinamide (PZA),...
Año de publicación: 2023
Urine 1H-NMR metabolomics to discriminate neurocysticercosis patients from healthy controls. An exploratory study.Lopez, J. M., . Leyva, V. E., Bustos, J.A., Perez, E., Sanchez, S., Saavedra, H., Gonzalez, I., Maruenda,H., Garcia. H.H. Am. J. Trop. Med. Hyg. 107,1, pp. 143–145. 1H-NMR spectroscopy combined...
Año de publicación: 2022
Measuring the 3J HNHa coupling by a Simple 2D-intra-HNCA IP/AP-E.COSY with simultaneous encoding of 15N chemical shift and 1J HaCa evolution.Lopez, J. M. & Maruenda, H Journal of Magnetic Resonance, 335, 107111. https://doi.org/10.1016/j.jmr.2021.107111 The novel intra HNCA IP/AP E.COSY pulse sequence implemented allowed to measure 3J HNHa coupling constants by a...
Año de publicación: 2022
NMR-based leaf metabolic profiling of V. planifolia and three endemic Vanilla species from the Peruvian AmazonLeyva, V.E.; Lopez, J.M.; Zevallos-Ventura, A.; Cabrera, R.; Cañari-Chumpitaz, C.; Toubiana, D.; Maruenda, H. Food Chemistry, 358, 129365 The paper describes a nuclear magnetic resonance based metabolomic platform developed to profile...
Año de publicación: 2021
Pure Shift Nuclear Magnetic Resonance: a New Tool for Plant MetabolomicsLopez, J. M., Leyva, V., Maruenda, H. J. Vis. Exp. (173), e62719. https://doi:10.3791/62719 The step-by-step procedure, which includes the plant extract preparation and the optimal recording of the Pure Shift PSYCHE...
Año de publicación: 2021
Guidelines for correlation coefficient threshold settings in metabolite correlation networks exemplified on a potato association panel.Toubiana, D.; Maruenda, H. BMC BioInfromatics Journal 22,116:1-14. https://doi.org/10.1186/s12859-021-03994-z Correlation-based network analysis has become an integral part to study the coordinated behavior of metabolites in plant mapping populations or collections of...
Año de publicación: 2021
Assessment of the presence of lipophilic phycotoxins in scallops (Argopecten purpuratus) farmed along Peruvian coastal wateLeyva, V, and Maruenda, H. Journal of Food Protection, 84, 2, 204-212. https://doi.org/10315/JFP-20-212. The paper describes the LC-MS/MS quantification method implemented to monitor four lipophilic biotoxins, namely, okadaic acid (OA), yessotoxin...
Año de publicación: 2021
Morphological and metabolic profiling of a tropical-adapted potato association panel subjected to water recovery treatment reveals new insights into plant vigorToubiana, T., Cabrera, R., Salas, E., Maccera, Ch., Franco dos Santos, G., Cevallos, D., Lindqvist-Kreuze, H., Boeck, B., Lopez, J.M., Maruenda, H. Plant J. 2020; 10.1111 /tpj.14892. doi:10.1111/tpj.14892. By applying advanced...
Año de publicación: 2020
Study of the acetylation pattern of Chitosan by pure shift NMRLopez, J.M., Sanchez, L., Nakamatsu, J., Maruenda, H. Analytical Chemistry., 92, 18, 12250–12256. https://doi.org/10.1021/acs.analchem.0c01638. Modern homonuclear decoupling methods were applied for an easy and unequivocal determination of the acetylation pattern of...
Año de publicación: 2020
Ultra-Clean Pure Shift 1H-NMR applied to metabolomics profiling.Lopez JM, Cabrera R, Maruenda H. Scientific reports 9.1: 6900. https://doi.org/10.1038/s41598-019-43374-5
Año de publicación: 2019