hugo garcia - Academia.edu (original) (raw)

Papers by hugo garcia

The Software-Defined Networking (SDN) technology is a network management method that allows dynam... more The Software-Defined Networking (SDN) technology is a network management method that allows dynamic, programmatically efficient network planning to improve its performance and monitoring. Given that SDN at each passing day becomes more prominent, a framework that can ensure reliable communication and a global state among devices become more important. We propose a state consistency framework that leverages a state machine abstraction using network updates among adjacent switches through packet piggybacking. We also use a moving average that when a condition is met, P4's packet cloning is triggered, hence ensuring that all packets arrive at their destination in the presence of link failures.

Journal of Applied Horticulture

Kent mango slices at two different stages of ripening: 4 days (S1) and 6 days (S2) after harvest ... more Kent mango slices at two different stages of ripening: 4 days (S1) and 6 days (S2) after harvest were kept under aseptic conditions at 13 and 23°C to determine if normal ripening could proceed after slicing. Whole mangoes stored at 23°C and 65% R.H. were used as control. Soluble solids of slices from all treatments did not show the same trend as whole fruits and remained unchanged at their initial values. Titratable acidity increased and pH decreased in all the slices and were in turn, different from the control fruit. Color parameters indicated loss of yellow pigments and browning. Decay occurred between days 5 and 7 of storage in slices that were stored at 23°C. Slices from S1 mangoes kept at 13°C suffered minimal changes due to cutting; however, the slices did not show the same compositional changes as the naturally-ripened whole fruit.

SEG Technical Program Expanded Abstracts 2017

Steroids, 2016

In this work we studied the effect of polyunsaturated fatty acids (PUFAs) methyl esters on choles... more In this work we studied the effect of polyunsaturated fatty acids (PUFAs) methyl esters on cholesterol photo-induced oxidation. The oxidative routes were modeled with a chemical reaction network (CRN), which represents the first application of CRN to the oxidative degradation of a food-related lipid matrix. Docosahexaenoic acid (DHA, T-I), eicosapentaenoic acid (EPA, T-II) and a mixture of both (T-III) were added to cholesterol using hematoporphyrin as sensitizer, and were exposed to a fluorescent lamp for 48h. High amounts of Type I cholesterol oxidation products (COPs) were recovered (epimers 7α- and 7β-OH, 7-keto and 25-OH), as well as 5β,6β-epoxy. Fitting the experimental data with the CRN allowed characterizing the associated kinetics. DHA and EPA exerted different effects on the oxidative process. DHA showed a protective effect to 7-hydroxy derivatives, whereas EPA enhanced side-chain oxidation and 7β-OH kinetic rates. The mixture of PUFAs increased the kinetic rates several fold, particularly for 25-OH. With respect to the control, the formation of β-epoxy was reduced, suggesting potential inhibition in the presence of PUFAs.

Historia Y Politica, 2005

ASME 2015 International Pipeline Geotechnical Conference, 2015

Incidents associated with geohazards involving oil and gas pipelines can be avoided in most cases... more Incidents associated with geohazards involving oil and gas pipelines can be avoided in most cases if there is an adequate program for monitoring pipelines, rights of way and triggering agents aimed at prevention.Knowledge about how to manage geohazards is currently dispersed in the operators’ experiences, and it is necessary to compile a guide that will facilitate the selection of the appropriate technology for monitoring pipelines, rights of way and triggering agents.This document explains the development of a project of the Regional Association of Oil, Gas and Biofuels Sector Companies in Latin America and the Caribbean – ARPEL, the deliverable of which will be a practical technical guide for companies operating in Latin America and the Caribbean for which geohazards represent one of the greatest risks to the integrity of oil and gas pipelines.Copyright © 2015 by ASME

Encyclopedia of Chemical Processing (Print Version), 2005

Empiria. Revista de metodología de ciencias sociales, 2010

Sensors and Actuators B: Chemical, 2006

An innovative hybrid sensor array formed by voltammetric electrodes chemically modified with thre... more An innovative hybrid sensor array formed by voltammetric electrodes chemically modified with three families of electroactive substances (conducting polymers, phthalocyanine complexes and perylenes) has been developed. Electroactive materials have been ...

Journal of the Science of Food and Agriculture, 2005

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Journal of Chemical Technology & Biotechnology, 2009

BACKGROUND: Lactobacillus reuteri NRRL B-14171 was immobilized in spherical calcium alginate bead... more BACKGROUND: Lactobacillus reuteri NRRL B-14171 was immobilized in spherical calcium alginate beads to study reuterin production. RESULTS: In relation to free cells (82 mmol L −1), the immobilized cells showed a sharp increase in reaction rate and achieved similar conversions with a reduction in the required biomass. Tests for mass transfer limitations on the reaction rate indicated that neither intraparticle nor external constraints were present. Effectiveness factors near 1 were estimated. CONCLUSION: Immobilization induced increased production of reuterin in Lactobacillus reuteri and is a feasible option for increasing process productivity.

Journal of the American Oil Chemists’ Society, 1990

Page 1. 890 REVIEW I Immobilized Lipase Reactors for Modification of Fats and Oils-A Review F. Xa... more Page 1. 890 REVIEW I Immobilized Lipase Reactors for Modification of Fats and Oils-A Review F. Xavier Malcata a, Hector R. Reyes a, Hugo S. Garcia b, Charles G. Hill, Jr. a,b,* and Clyde H. Amundson b aDepartment of Chemical ...

International Journal of Greenhouse Gas Control, 2012

Reducing the solvent regeneration energy is one of the main challenges in CO 2 capture from power... more Reducing the solvent regeneration energy is one of the main challenges in CO 2 capture from power plant flue gases. New tailored solvents are needed to achieve this goal. The present work describes tests of such new solvents in a gas-fired pilot plant which comprises the complete absorption/desorption process (column diameters 0.125 m, absorber/desorber packing height 4.2/2.52 m, flue gas flow 30-110 kg/h, CO 2 partial pressure 35-135 mbar). Four new solvents are studied and compared to MEA. Two of the new solvents SOLVENT1 (0.25 g/g N-methyldiethanolamine + 0.15 g/g N-methyl-1,3-propanediamine + 0.6 g/g H 2 O) and SOLVENT2 (0.25 g/g 2-amino-2-methyl-1-propanol + 0.15 g/g N-methyl-1,3-propanediamine + 0.6 g/g H 2 O) are developed in an EU project; and two other solvents SOLVENT3 and SOLVENT4 are developed by BASF. The four new solvents and MEA are studied in the same way in the pilot plant and detailed results are reported for all solvents. The measurements are carried out at constant CO 2 removal rate by an adjustment of regeneration energy in the desorber. The solvent flow rate is systematically varied. An optimal solvent flow rate leading to a minimum energy requirement is found from these studies. Direct comparisons of such results can suffer from differences in the kinetics of different solvent systems. These differences are experimentally studied by varying the flue gas flow rate at a constant ratio of solvent mass flow to flue gas mass flow and constant removal rate. Taking into account the results from these studies on kinetics allows a reasonable ranking of the solvents. The most promising of the studied solvents is SOLVENT4.

CyTA - Journal of Food, 2009

View related articles Citing articles: 3 View citing articles Extraccio´n de capsaicinoides duran... more View related articles Citing articles: 3 View citing articles Extraccio´n de capsaicinoides durante la deshidratacio´n osmo´tica de chile Habanero en salmuera Capsaicinoids extraction during osmotic dehydration of Habanero chili pepper in brine

Canadian Medical Association Journal, 2009

Clinical and Translational Oncology, 2005

5-Fluorouracil-induced small bowel toxicity in a patient with colorectal cancer 5-Fluorouracil-in... more 5-Fluorouracil-induced small bowel toxicity in a patient with colorectal cancer 5-Fluorouracil-induced gastro-intestinal toxicity predominantly affects the upper and the lower gastro-intestinal tract. Although 5-fluorouracil (5-FU) can cause severe small-bowel toxicity, this has been reported only in 6 patients with colon carcinoma receiving 5-FU-based therapy. The presentation was extensive ulceration and inflammation of the small bowel with no involvement of the colon. We report another case of this toxicity, and discuss the diagnosis and mechanisms by which 5-FU can induce small-bowel toxicity.

Biotechnology and Bioengineering, 2000

Enzymatic synthesis of mono-, di-, and triacyglycerols from (poly)unsaturated fatty acids (linole... more Enzymatic synthesis of mono-, di-, and triacyglycerols from (poly)unsaturated fatty acids (linoleic, oleic, and conjugated linoleic acids) has been studied as a solvent-free reaction in a packed-bed reactor containing an immobilized lipase from Mucor miehei. The extents of the esterification reactions of interest are primarily determined by the molar ratio of glycerol to fatty acid because the presence of excess glycerol as a immiscible phase is responsible for reducing the activity of the water produced by the esterification reactions. For molar ratios of fatty acid to glycerol of less than 1.5, the percentage of the fatty acid esterified decreases quasi-linearly with an increase in this molar ratio. By appropriate manipulation of the fluid-residence time, one can control the relative proportions of the various acylglycerols in the effluent stream. At the outlet of the reactor, one observes excellent spontaneous separation of the glycerol and acylglycerol/fatty acid phases. At 50 degrees C and a fluid residence time of 1 hour, as much as 90% of the fatty acid can be esterified when the molar ratio of fatty acid to glycerol is 0.33 or less.

Applied Biochemistry and Biotechnology, 2010

American Journal of Tropical Medicine and Hygiene, 2010

The tuberculin skin test (TST) quantifies cell-mediated immunity to tuberculosis antigens. Helmin... more The tuberculin skin test (TST) quantifies cell-mediated immunity to tuberculosis antigens. Helminths suppress cell-mediated immunity, so we studied the effect of helminth infection and deworming on the TST in a randomized, double-blind, placebo-controlled study in an indigenous Amazon community (N = 195). Stool microscopy diagnosed helminths in 98% and co-infection with multiple species in 24% of study subjects. The TST was positive (≥ 10 mm) for 49%, and responses increased with age (P < 0.001), Bacille Calmette Guerin (BCG) vaccination (P = 0.01), and tuberculosis contact (P = 0.05). TST results had no association with helminth-egg concentrations, species, or co-infections (all P > 0.1). One month after deworming with albendazole (three daily 400-mg doses), helminths were reduced, but 63% remained infected with helminths. Albendazole did not cause a change in TST size (P = 0.8) or positivity (P = 0.9) relative to placebo. Thus, TST reactions were unaffected by albendazole therapy that partially cured intestinal helminth infections, and TST interpretation was unaffected by high-burden helminth infections and co-infection with multiple helminth species.

American Heart Journal, 2006

National Cholesterol Education Program Adult Treatment Panel III guidelines for patients at a hig... more National Cholesterol Education Program Adult Treatment Panel III guidelines for patients at a high risk of coronary heart disease set a low-density lipoprotein cholesterol (LDL-C) target of &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; 100 mg/dL. This target can be difficult to attain with diet and current therapy. In a 16-week multinational trial, 1993 high-risk patients were randomized to rosuvastatin 20 mg, atorvastatin 10 mg, atorvastatin 20 mg, simvastatin 20 mg, or simvastatin 40 mg for 8 weeks. Patients either remained on starting treatment or switched to lower or milligram-equivalent doses of rosuvastatin for 8 more weeks. At 16 weeks, more patients achieved their LDL-C target by switching to rosuvastatin 10 mg than staying on atorvastatin 10 mg (66% vs 42%, P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .001) or simvastatin 20 mg (73% vs 32%, P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .001). Changing to rosuvastatin 20 mg brought more patients to their LDL-C target than staying on atorvastatin 20 mg (79% vs 64%, P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .001) or simvastatin 40 mg (84% vs 56%, P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .001). More very high risk patients achieved an LDL-C target of…