San Bernardo, Chile

University of Santiago de Chile

www.usach.cl
San Bernardo, Chile

The University of Santiago, Chile is one of the oldest public universities in Chile. The institution was born as Escuela de Artes y Oficios in 1849, under the government of Manuel Bulnes. It became Universidad Técnica del Estado in 1947, with various campuses throughout the country. In 1981, as a consequence of a reform on higher education under the dictatorship of Augusto Pinochet, it became what is now known as Universidad de Santiago de Chile, with all activities centered in a single 340,000 m² campus in the capital Santiago. Wikipedia.


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Method for the microbiological determination of traces of antibiotics in low volume biological samples, which comprises determining the minimum inhibitory concentration (MIC) of an antibiotic selected from among minocycline, ciprofloxacin, kanamycin, tetracycline and oxacillin against Staphylococcus aureus. The bacteria are grown in Mueller-Hinton broth (MHB) overnight, said cultures subsequently being diluted to 0.5 McFarland standard (1.5108 cells/mL). Said antibiotics are subsequently added to 96-well plates in a final volume of 200 L and incubated at 37 C. for 18 hours. Absorbency is determined and the results are expressed as the percentage of inhibition relative to the control containing the biological sample, in turn selected from urine, blood, synovial fluid, aqueous humour of the eye or cerebro spinal fluid (CSF), and the bacterial culture. The curve representing the percentage of inhibition of bacterial growth versus concentration of antibiotic is obtained, and is adjusted by the Four Parameter Logistic Curve (4PL), yielding the concentration values of the antibiotics in the biological sample. The method determines amounts of antibiotic in the biological sample even at ng/mL level.


Patent
University of Santiago de Chile | Date: 2016-10-06

A submersible system and method for measuring the gas volume fraction in an aerated fluid inside a reactor (1) wherein the aerated fluid is composed by gas dispersed in the form of bubbles in a fluid in the form of a solution, suspension, mixture of liquids or a combination thereof, which comprises: an open and pass-through gas exclusion device (20) of a variable cross section wherein the inlet opening whereby the fluid enters without gas bubbles towards the opened and through gas bubbles exclusion device (20) is greater than the outlet opening whereby the fluid exits without gas bubbles of the opened and through gas bubble exclusion device (20), wherein said outlet opening abuts with an inlet pipe (23), a sealed camera (24) which comprises a flow measurement means, which contains at least one flow meter allowing to measure the gas-free fluid velocity when circulating between an inlet (27) of said sealed camera (24) and an outlet (28) of said sealed camera (24), wherein said inlet (27) of said sealed camera (24) is coupled to said inlet pipe (23) and wherein said outlet (28) of said sealed camera (24) is coupled to an outlet pipe (26) of the liquid dispersion towards the reactor (1); a flow transmitter (29) connected to said flow meter, located inside or outside said sealed camera (24), wherein said transmitter (29) generates an outlet signal proportional to the bubbles-free fluid velocity through a gas bubble exclusion cell and a calculation unit (30) which generates an output signal (31) proportional to the gas volume fraction in the aerated fluid.


Biofungicidal composition from a biologically pure culture of a Chilean bacterial isolate obtained from soils of the seventh region of Maule, Chile, corresponding to Paenibacillus polymyxa SCHC33, strain with the deposit number RGM2141 granted by the depository authority of the Chilean Collection of Microbial Genetic Resources (CChRGM) to be used as an environmentally friendly, biological control agent against fungal plant diseases, particularly fruits susceptible to infection by Botrytis cinerea, efficiently inhibiting conidial germination and mycelium proliferation of said phytopathogenic fungus, furthermore protects plant leaves and fruits from infection by the same fungus, and has the potential to be used in biological control of other fungi and in general of phytopathogenic microorganisms.


The present invention is related to a composition to obtain peeled prickly pears coated with an edible film based on cellulose derivatives; process to obtained peeled prickly pears with the cellulose derived edible composition; and its use to coat the peeled prickly pears to delay the fruit dehydration and decomposition.


Barrera N.P.,University of Santiago de Chile | Robinson C.V.,University of Oxford
Annual Review of Biochemistry | Year: 2011

Rapid advances in structural genomics and in large-scale proteomic projects have yielded vast amounts of data on soluble proteins and their complexes. Despite these advances, progress in studying membrane proteins using mass spectrometry (MS) has been slow. This is due in part to the inherent solubility and dynamic properties of these proteins, but also to their low abundance and the absence of polar side chains in amino acid residues. Considerable progress in overcoming these challenges is, however, now being made for all levels of structural characterization. This progress includes MS studies of the primary structure of membrane proteins, wherein sophisticated enrichment and trapping procedures are allowing multiple posttranslational modifications to be defined through to the secondary structure level in which proteins and peptides have been probed using hydrogen exchange, covalent, or radiolytic labeling methods. Exciting possibilities now exist to go beyond primary and secondary structure to reveal the tertiary and quaternary interactions of soluble and membrane subunits within intact assemblies of more than 700 kDa. © 2011 by Annual Reviews. All rights reserved.


Oliva C.A.,University of Santiago de Chile
Ageing research reviews | Year: 2013

Wnt components are key regulators of a variety of developmental processes, including embryonic patterning, cell specification, and cell polarity. The Wnt signaling pathway participates in the development of the central nervous system and growing evidence indicates that Wnts also regulates the function of the adult nervous system. In fact, most of the key components including Wnts and Frizzled receptors are expressed in the adult brain. Wnt ligands have been implicated in the regulation of synaptic assembly as well as in neurotransmission and synaptic plasticity. Deregulation of Wnt signaling has been associated with several pathologies, and more recently has been related to neurodegenerative diseases and to mental and mood disorders. In this review, we focus our attention on the Wnt signaling cascade in postnatal life and we review in detail the presence of Wnt signaling components in pre- and postsynaptic regions. Due to the important role of Wnt proteins in wiring neural circuits, we discuss recent findings about the role of Wnt pathways both in basal spontaneous activities as well as in activity-dependent processes that underlie synaptic plasticity. Finally, we review the role of Wnt in vivo and we finish with the most recent data in literature that involves the effect of components of the Wnt signaling pathway in neurological and mental disorders, including a special emphasis on in vivo studies that relate behavioral abnormalities to deficiencies in Wnt signaling, as well as the data that support a neuroprotective role of Wnt proteins in relation to the pathogenesis of Alzheimer's disease. Copyright © 2013 Elsevier B.V. All rights reserved.


Castro-Rodriguez J.A.,University of Santiago de Chile
Journal of Allergy and Clinical Immunology | Year: 2010

Recurrent wheezing is a common problem in young children: approximately 40% of children wheeze in their first year of life. However, only 30% of preschoolers with recurrent wheezing still have asthma at the age of 6 years. Nevertheless, asthma, the most prevalent chronic disease in children, is difficult to diagnose in infants and preschoolers. This article reviews the importance of determining at an early age which infants/ preschoolers will have asthma later in life, analyzes the pros and cons of different predictive indices, and discusses the efficacy of the Asthma Predictive Index. (J Allergy Clin Immunol 2010; 126: 212-6.) © 2010 American Academy of Allergy, Asthma & Immunology.


Patent
University of Santiago de Chile | Date: 2016-08-22

The invention proposes a container further extending the shelf life of foods, particularly berries, by including an active agent having antifungal capability into the container surface so that when the fruit is packaged inside the container it is permanently exerted an antifungal effect over the surface, which is the place on the longer determinants occurs, but also contributing to preserve the general environment. Also it proposes a preparation process and its use.


Patent
University of Santiago de Chile | Date: 2016-02-02

A method for treating cancer. The method including administering to a subject in need thereof, a combination including an effective amount of polymyxin B in combination with an effective amount of ATP, wherein the combination is effective in treating a tumor or cancer in the subject.


The present invention thus relates to a formulation comprising St. Johns Wort (Hypericum perforatum, HP), rosemary (Rosmarinus officinalis) extracts or a mixture of both, to improve survival to stressful and pathogens events, and also the feed conversion factor (greater weight gain and growth by delivered food). All of this, without affecting the fish smoltification ability.

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