Patricia Arancibia

• Ph.D.
• University of Bío-Bío

This study reports the first record of the genus Aplanochytrium on the coast of Chile, belonging to the class Labyrinthulomycetes in the kingdom Stramenopila. These marine protists play an essential role in carbon and nitrogen cycles as decomposers in the aquatic ecosystem. Although ecologically significant, their global diversity and distribution...

The application of the Multispectral Instrument (MSI) aboard Sentinel-2A/B constellation for assessing water quality in Chilean lakes represents an emerging area of research, particularly for the environmental monitoring of optically complex water bodies. Similarly, atmospheric correction processors applied to aquatic environments, such as the Case...

Se destaca la importancia de que los estudiantes adquiera conocimientos y reconozca especies nativas de su entorno. De esta manera surge la problemática de saber el estado del conocimiento y valoración que tienen los estudiantes en formación por las plantas; especialmente si saben los conceptos de especies nativas y/o endémicas del país. Atendiendo...

Hantavirus infection is an endemic zoonosis in Chile, with an average lethality of around 36%. The highest lethality (60%) was recorded in 1997. Prevention strategies have been applied since then. Early diagnosis and technologies, such as the use of ECMO (Extracorporeal Membrane Oxygenation) and Hantavirus immune plasma, have contributed to increas...

Thraustochytrids are unicellular heterotrophic marine protists that have been described as producing a high content of polyunsaturated fatty acids (PUFAs). Among them, arachidonic acid (ARA) stands out as a precursor of several mediators of pivotal importance for the immune system. However, the biotechnological potential of thraustochytrids for ARA...

Background and aims: Canyon streambeds in the hyperarid Atacama Desert surprisingly harbor magnificent groves of endemic giant horsetail wetland plants, Equisetum xylochaetum. Our previous metagenomic study of eukaryotes closely associated with this plant indicated that the microbiome included prokaryotes that might likewise influence host success...

The modern pteridophyte genus Equisetum is the only survivor of Sphenopsida, an ancient clade known from the Devonian. This genus, of nearly worldwide distribution, comprises approximately 15 extant species. However, genomic information is limited. In this study, we assembled the complete chloroplast genome of the giant species Equisetum xylochaetu...

This project was aimed to identify the quenching chemistry of biologically important reactive oxygen and nitrogen species (ROS/RNS, including radicals), to show antioxidant action against reactive species through H‐atom and electron transfer reactions, and to evaluate the ROS/RNS scavenging activity of antioxidants with existing analytical methods...

Understanding features that fostered the persistence of Equisetum–Earth's oldest extant vascular plant genus–since Mesozoic times and through episodes of significant global environmental change, is of current interest in view of modern challenges to plant survival. In addition to known structural and physiological adaptations, we hypothesized that...

Prokaryotic Nostoc, one of the world’s most conspicuous and widespread algal genera–like eukaryotic algae, plants, and animals–is known to support a microbiome that influences host ecological roles. Past taxonomic characterizations of surface microbiota (epimicrobiota) of free‐living Nostoc sampled from freshwater systems employed 16S rRNA genes, t...

A feasibility analysis of tertiary treatment for Organic Liquid Agricultural Waste is presented using filamentous algae belonging to the genus Cladophora sp. as an alternative to chemical tertiary treatment. The main advantages of tertiary treatments that use biological systems are the low cost investment and the minimal dependence on environmental...

Lake Laguna Santa Elena, a freshwater body, located in mid-south of Chile, is an environmental asset used as a water resource by the agricultural and touristic sector and is the habitat for a wide variety of endemic avifauna. The objective of this study was to assign a monetary value to this lacustrine body, using the methodology of AMUVAM (Multicr...

Revista Chilena de Entomología (2019) 45 (3): 399-402 Este es un artículo de acceso abierto distribuido bajo los términos de la licencia Creative Commons License (CC BY NC 4.0) Scientific Note First record of the genus Polyxenus Latreille (Diplopoda: Penicillata: Polyxenida) in the supralittoral zone of Cocholgüe, Biobío Region, Chile Primer regist...

Fats and oils are the most common pollutants in wastewater, and are usually eliminated through physical processes in wastewater treatment plants, generating large amounts of fats and residual oils that are difficult to dispose of and handle. The degradation of fatty wastewater was studied in a real wastewater treatment plant and a laboratory scale...

Several studies related to parental care in Chilopoda have recently been published (Bonato & Minelli 2002, Chiarello 2015, Kudo et al. 2016, Mitib et al. 2010, 2016). However, knowledge regarding reproductive behaviour for these arthropods remains insufficient (Bonato & Minelli 2002).

Since rooted vascular plants rose to dominance, associated microbiota have powerfully influenced global biogeochemistry by mobilizing N and P and otherwise aiding plant health, thereby fostering sequestration of CO2 into coal and soil organics. Less well understood are evolutionary history and biogeochemical roles of microbiomes of ecologically sig...

The Order Scolopendromorpha in Chile is represented by the families Cryptopidae and Scolopendridae, comprehending the genera Cryptops Leach, 1815 and Akymnopellis Shelley, 2008, respectively. Before the year 2008, the genus Akymnopellis, was known to have a geographic distribution area from Atacama through Valdivia. A broader distribution of the ge...

Premise of research. Abundant peat mosses and epibiotic microbiota, common in widespread modern peatlands, constitute complex biotic systems recognized to provide globally significant ecosystem services: organic carbon sequestration, methane oxidation, and nitrogen fixation. Because recent fossil and molecular diversification evidence indicates tha...

Resumen: El Museo de Zoología de la Universidad de Concepción (Chile) cuenta con más de 500.000 ejemplares, representantes de un poco más de 15.000 especies de todos los grupos zoológicos. Dentro de las diversas colecciones, existe una pequeña muestra de quilópodos que contiene cerca de 400 ejemplares. Éstos no habían sido revisados hasta ahora, po...

Craspedacusta sowerbii (Lankester, 1880) is a cnidarian thought to originate from the Yangtze River valley in China. However, C. sowerbii is now an invasive species in freshwater systems worldwide. In Chile, C. sowerbii was first recorded in 1942 by Porter and Schmitt in the Marga-Marga Reservoir, in Valparaíso. Since then, there have been few furt...

Resumen: El estudio de los Chilopoda en Chile ha sido escaso y discontinuo. La falta de información, debida a la escasez de pub-licaciones, junto con la ausencia de manuales de identificación, han hecho complejo el estudio de estos artrópodos. Es por esto que el objetivo del presente trabajo es determinar el estado del conocimiento de los Chilopoda...

Se determina la motivación en estudiantes universitarios, y esto se relaciona con el rendimiento académico; A partir de la aplicación de dos metodologías de enseñanza. Se discute su relación y se entregan prospecciones futuras.

Organic, semiorganic, and conventional "Hayward" kiwifruits, treated with ethylene for 24 h and stored during 10 days, were assessed by UV spectrometry, fluorometry, and chemometrical analysis for changes in selected characteristics of quality (firmness, dry matter and soluble solid contents, pH, and acidity) and bioactivity (concentration of polyp...

Kiwi fruits “Hayward” were submitted to ethylene treatment during 24 h, following by storage at 20C for 10 days. Significant differences were found in polyphenols and in the antioxidant capacities in conventional, low chemical and organic kiwi fruits. Ethylene treatment increased the bioactivity of organic, low chemical and conventional kiwi fruit....

Conventionally (CG), semi-organically (low chemical, LCG) and organically grown (OG) kiwi fruit was stored at 0° C for 24 weeks. Firmness gradually decreased with storage time regardless of cultivation type, and the rate of softening was slightly higher in OG fruits than those of CG or LCG fruits. Soluble solids content increased with storage time,...

High-latitude terrestrial ecosystems face the triple threats of climate warming, increased exposure to UV arising from polar ozone depletion, and deforestation. Lichen communities of southernmost Chile are recognized for their high diversity, which includes nitrogen-fixing cyanolichens. Such lichens are common on forest trees, contribute nitrogen t...

The volatile fractions of Cape gooseberry and blueberry were determined by headspace solid-phase microextraction coupled with comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry (HS-SPME/GC×GC-TOFMS). The highest amount of alcohol (51.8%), ester (32.8%) and carboxylic acid (6.9%) was in blueberry in comparison wit...

Pleurotus ostreatus strains were cultured in liquid medium and on wheat straw. The yields of lovastatin were compared.

Two extractions with methanol and water were used to determine the antioxidant and binding properties of some berries as a supplement to food. Fluorometry, FTIR spectra and radical scavenging assays were used for characterisation of bioactive compounds (polyphenols, flavonoids, flavanols and tannins) and the levels of their antioxidant activities (...

Microbialites are mineral formations formed by microbial communities that are often dominated by cyanobacteria. Carbonate microbialites, known from Proterozoic times through the present, are recognized for sequestering globally significant amounts of inorganic carbon. Recent ecological work has focused on microbial communities dominated by cyanobac...

Fluorometry, ESI-MS, FTIR, and radical scavenging assays were used for characterization of bioactive compounds and the levels of their antioxidant activities. Polyphenols, flavonoids, anthocyanins, and ascorbic acid and the level of antioxidant activity of water extracts of “Murtilla-like” [Myrteola nummularia (Poiret) Berg.], and other widely cons...

Dimethylsulfoxide extracts of Chilean berries [Myrteola nummularia, 'Murtilla-like'] vs. well known 'Murtilla', Chilean and Polish blueberries, and Chilean raspberries were investigated for their antioxidant, quenching and antiproliferative activities. The significantly highest levels of polyphenols, flavonoids, flavanols and their antioxidant acti...

The aim of this investigation was to determine the contents of polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), minerals, trace elements and bioactivity in the gastropod Rapana thomasiana, which can be used as an environmental bioindicator organism. The chemical differences between Rapana thomasiana from polluted (RapaPol)...

Premise of the study: The streptophyte water-to-land transition was a pivotal, but poorly understood event in Earth history. While some early-diverging modern streptophyte algae are aeroterrestrial (living in subaerial habitats), aeroterrestrial survival had not been tested for Coleochaete, widely regarded as obligately aquatic and one of the exta...

The aim of this research was to characterize a new kind of Chilean Murtilla-like berries (Myrteola nummularia (Poiret) Berg. Myrtaceae, called by locals as Daudapo) vs.well known Murtilla, blueberries, raspberries and black chokeberries. Polyphenols, flavonoids, flavanols and tannins and the level of antioxidant activity by ABTS, FRAP and CUPRAC ra...

A species of Mougeotia (C.A. Agardh) that was the dominant component of a metaphytic bloom-forming filamentous algal assemblage in an experimentally acidified lake (Little Rock Lake, Vilas County, Wisconsin, U.S.A.) was isolated into unialgal culture for analysis of pH effects on cell morphology and carbonic anhydrase activity and localization. Ext...

The aim of this investigation was to examine biochemical differences in the gastropod Rapana venosa (R. venosa) from polluted (RvP) and nonpolluted (RvN) sites of the Black Sea's Bulgarian coast that may serve as bioindicators of environmental quality. Mussels Mytilus galloprovincialis (MMg) were collected from polluted (MMgP) and nonpolluted (MMgN...

The aim of this investigation was to introduce several analytical methods for determination of polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), minerals, trace elements, and fatty acids in Rapana thomasiana as a marine pollution indicator organism. The chemical differences of the gastropod Ra. thomasiana from polluted and...

Unlabelled: Premise of the study: The goal of this study was to illuminate the evolutionary history and ecological importance of plant mixotrophy-the uptake and utilization of exogenous organic compounds. • Methods: We quantitatively assessed the effect of sugar amendments on laboratory growth of Sphagnum compactum as a representative emergent...

The aim of this investigation was to compare the content of the polyphenols and ascorbic acid and the radical scavenging capacity of ethylene-treated and nontreated kiwifruit. It was found that the contents of these bioactive compounds determined by UV spectroscopy and fluorometry were higher in ethylene-treated kiwifruit than in the nontreated one...

The antioxidant properties of durian (Durio zibethinus Murr., cv. Mon Thong) at different stages of ripening were investigated using fluorometry, UV spectroscopy, and HPLC/DAD analyses. Total polyphenols, flavonoids, anthocyanins and flavanols in ripe durian were significantly higher (p < 0.05) than in mature and overripe fruits. Free polyphenols a...

The antioxidant activities of different durian cultivars at the same stage of ripening (Mon Thong, Chani, Kan Yao, Pung Manee and Kradum) were compared in order to choose the best as a supplement in the human diet. Total polyphenols (mg gallic acid equivalent/100 g fresh weight (FW)) and flavonoids (mg catechin equivalent (CE)/100 g FW) in Mon Thon...

Ethylene-treated kiwifruit (Actinidia deliciosa) cultivar ‘Hayward’ was compared with the air-treated one. The correlation coefficients between total polyphenols and the antioxidant capacities measured by [2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonic acid)] (ABTS) with Trolox equivalent antioxidant capacity (TEAC), 1,1-diphenyl-2-picrylhydrazyl...

Garlic (Allium sativum L.) is widely used as an obligatory part in many cooked dishes loosing during this process a certain part of its bioactivity. Antioxidant capacity measured by the ferric-reducing/antioxidant power (FRAP) method and by the 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical assay was the highest in raw and in a short time proces...

The objective of the present study was to investigate the effect of phenolic substances and proteins on the antioxidant potentials in some cereals and pseudocereals and to compare their bioability. The polyphenol dry matter extracts (PDME) from the investigated seeds of buckwheat, rice, soybean, amaranth and quinoa with 1.2M HCl in 50%methanol/wate...

The aim of this study was to find a reliable biomarker of seawater pollution. For this purpose the contents of Zn and Cu, proteins and antioxidant activity in mussels Mytilus galloprovincialis collected from polluted and non-polluted sites of the Bulgarian Black Sea coast were compared. To determine the above-mentioned indices atomic spectroscopy,...

In the present report the changes in mussels Mytilus galloprovincialis protein profile, as a reaction of water pollution, is presented. The antioxidant capacity was determined by the efficacy to scavenge the derived radical in mussel samples using the Trolox Equivalent Antioxidant Capacity (TEAC) assay. The highest percentage of inhibition was esti...

Preservation of a healthy environment is a very important task, especially in the time of the total industrial revolution. Therefore, attempts to find new additional biomarkers of contamination are welcomed. For this aim, the functional and antioxidant properties of mussel Mytilus galloprovincialis proteins and the heavy metals Cd and Pb were explo...

The effect of different fractions of methanolic extract of Bauhinia candicans leaves were investigated on experimentally-induced diabetic rabbits. The crude extracts (8 mg/kg) showed hypoglycemic activity along with a reduced urinary glucose excretion. Among the fractions, the highest activity was exhibited by the butanolic fraction (fraction III)....

The aim of this investigation was to evaluate the total antioxidant radical scavenging capacity (TARSC) in tissue extracts for understanding biochemical adaptations involving the antioxidant defense system of a bivalve mussel, Mytilus galloprovincialis, sampled in polluted (Pol) and non-polluted (Npol) sites from Black Sea coasts. Antioxidant-rich...

The biologically active compounds, antioxidant activities, and free radical scavenging effects of black mussel dry matter (Mytilus galloprovincialis)--(BMDM) were investigated. The extract from BMDM with absolute methanol (BMDMAMet) showed the strongest inhibition of lipid peroxidation as a function of its concentration, and was comparable to the a...

Intrinsic fluorescence and SDS-PAGE analysis were employed to study the seasonal qualitative and quantitative changes of phytoplankton composition at Varna Bay (Black Sea). Variation in the maximum emission wavelength (lambda(max)) of the phytoplankton proteins (398 nm in the summer and 340 nm in the spring) was observed. In addition, a decrease in...

It was shown that phytoplankton from the Varna Bay, Black Sea, has significantly more suspended carbohydrates, proteins and biomass in July than in April. The dominant species were Bacillariophyceae and Dinophyceae. Electrophoretic and fluorescent spectra have shown the main differences in molecular weight and stability of phytoplankton proteins. P...

Amino acid analysis, electrophoretic separation and Fourier transform-infrared spectra (FT-IR) were used to determine and characterize proteins and amino acids in two types of beer: with a high content of proteins (Beer 1) and with a low content of proteins (Beer 2). The concentration of total proteins, albumin and of most studied amino acids in Be...

Two carbonic anhydrase (CA) antibodies, one to the primarily periplasmic alpha-type enzyme of the chlorophycean Chlamydomonas and another to pea (Pisum sativum) beta-type CA, which is primarily located in the chloroplast stroma, were applied to the charophycean green alga Mougeotia sp., shoot cells of the later divergent charophycean, Chara zeylani...

Mougeotia sp, a dominant component of a metaphytic algal bloom-forming alga in an experimentally acidified lake (Little Rock Lake, Vilas Co. WI) was isolated to analyze pH effects on carbonic anhydrase (CA) activity, localization, and algal morphology. A potentiometric method was used to assess internal and external CA activities using two CA inhib...

One of the earliest and most reliable indications of acid precipitation affecting freshwater systems is the development of littoral blooms of the filamentous green alga Mougeotia (Zygnematales, Charophyceae). Field observations of depth distribution and seasonal abundance in Little Rock Lake, an experimentally acidified seepage lake in north-centra...

When acid precipitation impacts freshwater systems, littoral blooms of the filamentous green alga Mougeotia (Zygnematales, Charophyceae) frequently develop. Field observations of its development in Little Rock Lake, an experimentally acidified seepage lake in north-central Wisconsin, indicated that the species of Mougeotia present there may have an...

An active learning approach has been developed and implemented to teach Ordinary Differential Equations (ODE) for Food Engineering undergraduate students using an Internet -based package (EV & C UBB). A variety of learning strategies have been introduced to support and extend the traditional lectures making it easy for instructors to design and del...