Marlen Gutiérrez Cutiño

• PhD. in Chemistry
• University of Santiago Chile

Developing a powder-form natural antioxidant additive involves utilizing polyphenols extracted from agro-industrial wastes (walnut green husk). This research explores chickpea proteins (CPP) as an emergent encapsulating agent to enhance the stability and shelf life of the antioxidant additive. This study aims to develop a natural antioxidant powder...

Chickpeas are the third most abundant legume crop worldwide, having a high protein content (14.9-24.6%) with interesting technological properties, thus representing a sustainable alternative to animal proteins. In this study, the surface and structural properties of total (TE) and sequential (ALB, GLO, and GLU) protein fractions isolated from defat...

Abarcamos los principios y estrategias a nivel mundial y nacional sobre economía circular, y las posibles materias primas de compuestos polifenólicos a partir de residuos de la agroindustria chilena, finalizando con la técnica y material de pared más utilizados (secado por aspersión utilizando maltodextrina) para la encapsulación de estos compuesto...

To analyze the mechanisms involved in anthracene (ANT) degradation in the marine alga Ulva lactuca, total RNA was obtained from the alga cultivated without ANT and with 5 μM of ANT for 24 h, and transcriptomic analyses were performed. A de novo transcriptome was assembled, transcripts differentially expressed were selected, and those overexpressed...

The aim of the present work was to study the effect of a solvent/water mixture on the structural characteristics of extracted lignin from Eucalyptus nitens, and to relate the functional groups and interunit linkages present in the lignin with the distribution of phenolic compounds obtained after its alkaline oxidation. The high content of β-O-4’ su...

Here we report the first example of nanoMIL-100 particles modified with monomeric cyclodextrin derivatives of different length by exploiting strong interactions between non-saturated iron trimers at the external surface and carboxylate functionalities located at the end of biocompatible and flexible linkers of cyclodextrins. The main results reveal...

Walnut green husk (WGH) is a waste generated by the walnut (Juglans regia L.) harvest industry. It represents a natural source of polyphenols, compounds with antioxidant and antimicrobial activities, but their activity could be dependent on the ripeness stage of the raw material. In this study, the effect of the different ripeness stages—open (OH)...

New insights in the electronic properties of mixed-valence polyoxovanadoborate clusters.

Mixed-valence polyoxovanadates (POV) constitute a family of polyoxometalates whose electronic properties are still unclear. Polyoxovanadoborates (POVB) a subfamily of POV, show different electronic and magnetic properties respect of those from the POV. On the interpretation of the electronic spectra of these compounds only three bands in the 350 to...

Two new aromatic organo-imido polyoxometalates with an electron donor triazole group ([n-Bu4N]2[Mo6O18NC6H4N3C2H2]) (1) and a highly conjugated fluorene ([n-Bu4N]2[Mo6O18NC13H9]) (2) have been obtained. The electrochemical and spectroscopic properties of several organo-imido systems were studied. These properties were analysed by the theoretical st...

In order to analyze whether the reducing redox status and activation of thioredoxin reductase (TRR)/thioredoxin(TRX) system induced by oligo-carrageenan (OC) kappa in Eucalyptus globulus activate secondary metabolism increasing terpenoid synthesis, trees were sprayed on the leaves with water, with OC kappa, or with inhibitors of NAD(P)H, ascorbate...

Background: The progress in material science and the recent advances in biodegradable/biocompatible polymers and magnetic iron oxide nanoparticles have led to develop innovative diagnostic and therapeutic strategies for diseases based on multifunctional nanoparticles, which include contrast medium for magnetic resonance imaging, agent for hyperther...

A magnetic composite was prepared by wet-impregnating a powder of a natural zeolite with a magnetic Fe oxide-containing synthetic material. Both starting materials were first characterized with X-ray diffraction, scanning electron microscopy, Mö ssbauer spectroscopy, and by isoelectric-point using vibrating-sample magnetometry. The synthetic Fe oxi...

Although dry combustion (DC) carbon dioxide (CO2) is an accurate method to measure total soil carbon (C), it is a rather expensive one. Therefore, wet oxidation by the Walkley-Black (WB) method is widely used in acidic Chilean volcanic soils, although there are no studies comparing both WB and DC. The aim of this article was to compare DC and WB in...

The potential impact of the addition of sewage sludge from domestic waste water treatment plants on agricultural soils is a worldwide concern. A proportion of heavy metals in sewage sludge will be present in the soil solution; their equilibria can be modified by the competitive interactions between them, changing not only their mobility but also th...

Forest fires are a common occurrence in central southern Chile where soils are mostly Andisols. The ash deposits may alter the chemical properties of the soils in the burned areas and nearby agricultural lands. In a column experiment, three Andisols found in this region were treated with 2-cm-thick ash deposit on the surface and leached with 12 por...

RESUMEN En Chile, es especialmente importante este tipo de estudios sobre suelos derivados de materiales volcánicos dado que representan entre el 50% y el 60% del total del suelo arable que el país dispone. Los suelos derivados de cenizas volcánicas, corresponden a un sistema de carga variable. Éstos poseen una carga eléctrica superficial dependien...