Ciudad Victoria, Mexico

Autonomous University of Tamaulipas
Ciudad Victoria, Mexico

The Autonomous University of Tamaulipas is a Mexican public university based in Victoria, Tamaulipas. Throughout the larger cities of Reynosa, Matamoros, Nuevo Laredo, and Tampico and smaller cities of Ciudad Mante and Valle Hermoso are UAT campuses that offer undergraduate studies.Each of the various university faculties offer graduate studies leading to the Master's or Doctorate Degree. The Faculty of Medicine of Tampico offers the professional degree of Physician & Surgeon as well as post-graduate specialty certificates in: pediatrics, internal medicine, surgery, obstetrics & gynecology, family practice, and intensive care medicine.The university's "Center of Excellence" sponsors specialized professional certificates and studies for the state of Tamaulipas. Wikipedia.

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Blanco-Martinez Z.,Autonomous University of Tamaulipas | Perez-Castaneda R.,Autonomous University of Tamaulipas
Marine and Freshwater Research | Year: 2017

The value of submerged aquatic vegetation (SAV) as a nursery habitat for penaeid shrimp has been recognised previously; however, the importance of SAV in terms of its distance from a tidal inlet (a site through which shrimp postlarvae migrate into coastal lagoons) has not been evaluated. In the present study, the effect of proximity to a tidal inlet on the relative importance of SAV beds for Farfantepenaeus shrimp was evaluated in the Laguna Madre of Tamaulipas (Mexico). Sampling was performed monthly from February to December 2005, diurnally and nocturnally, in two SAV bed areas, one 25km (distant) and the other 1km (nearby) from the inlet. Densities of shrimp (F. aztecus, F. duorarum and F. brasiliensis) were consistently higher in the nearby SAV bed during both the day and night. Water temperature was the most important explanatory variable of shrimp abundance in both SAV beds. The temperature-Abundance relationship was negative in all cases, except in the distant SAV bed at night, when shrimp abundance was positively related to dissolved oxygen and salinity. The nearby SAV bed had higher recruit abundance and supported a greater numbers of juveniles and subadults. In contrast, shrimp abundance in the distant SAV bed was apparently limited by recruitment. © CSIRO 2017.

Jimenez-Andrade J.M.,University of Arizona | Jimenez-Andrade J.M.,Autonomous University of Tamaulipas | Mantyh P.W.,University of Arizona | Mantyh P.W.,Arizona Cancer Center | Mantyh P.W.,Research Service
Arthritis Research and Therapy | Year: 2012

Introduction: Although the prevalence of arthritis dramatically increases with age, the great majority of preclinical studies concerning the mechanisms that drive arthritic joint pain have been performed in young animals. One mechanism hypothesized to contribute to arthritic pain is ectopic nerve sprouting; however, neuroplasticity is generally thought to be greater in young versus old nerves. Here we explore whether sensory and sympathetic nerve fibers can undergo a significant ectopic nerve remodeling in the painful arthritic knee joint of geriatric mice.Methods: Vehicle (saline) or complete Freund's adjuvant (CFA) was injected into the knee joint of 27- to 29-month-old female mice. Pain behaviors, macrophage infiltration, neovascularization, and the sprouting of sensory and sympathetic nerve fibers were then assessed 28 days later, when significant knee-joint pain was present. Knee joints were processed for immunohistochemistry by using antibodies raised against CD68 (monocytes/macrophages), PECAM (endothelial cells), calcitonin gene-related peptide (CGRP; sensory nerve fibers), neurofilament 200 kDa (NF200; sensory nerve fibers), tyrosine hydroxylase (TH; sympathetic nerve fibers), and growth-associated protein 43 (GAP43; nerve fibers undergoing sprouting).Results: At 4 weeks after initial injection, CFA-injected mice displayed robust pain-related behaviors (which included flinching, guarding, impaired limb use, and reduced weight bearing), whereas animals injected with vehicle alone displayed no significant pain-related behaviors. Similarly, in the CFA-injected knee joint, but not in the vehicle-injected knee joint, a remarkable increase was noted in the number of CD68 +macrophages, density of PECAM +blood vessels, and density and formation of neuroma-like structures by CGRP +, NF200 +, and TH +nerve fibers in the synovium and periosteum.Conclusions: Sensory and sympathetic nerve fibers that innervate the aged knee joint clearly maintain the capacity for robust nerve sprouting and formation of neuroma-like structures after inflammation/injury. Understanding the factors that drive this neuroplasticity, whether this pathologic reorganization of nerve fibers contributes to chronic joint pain, and how the phenotype of sensory and sympathetic nerves changes with age may provide pharmacologic insight and targets for better controlling aging-related joint pain. © 2012 Mantyh et al.; licensee BioMed Central Ltd.

Antonio-Lopez J.E.,National Institute of Astrophysics, Optics and Electronics | Castillo-Guzman A.,Autonomous University of Nuevo León | May-Arrioja D.A.,Autonomous University of Tamaulipas | Selvas-Aguilar R.,Autonomous University of Nuevo León | And 2 more authors.
Optics Letters | Year: 2010

We report on a wavelength-tunable filter based on multimode interference (MMI) effects. A typical MMI filter consists of a multimode fiber (MMF) spliced between two single-mode fibers (SMF). The peak wavelength response of the filter exhibits a linear dependence when the length of the MMF is modified. Therefore a capillary tube filled with refractive-index-matching liquid is used to effectively increase the length of the MMF, and thus wavelength tuning is achieved. Using this filter a ring-based tunable erbium-doped fiber laser is demonstrated with a tunability of 30 nm, covering the full C-band. © 2010 Optical Society of America.

Antonio-Lopez J.E.,National Institute of Astrophysics, Optics and Electronics | May-Arrioja D.A.,Autonomous University of Tamaulipas | Likamwa P.,University of Central Florida
IEEE Photonics Technology Letters | Year: 2011

A fiber-optic liquid level sensor based on multimode interference (MMI) effects is proposed and demonstrated. We show that MMI and self-image effects can be effectively applied for multiplexed liquid level sensing, because the natural response as a band-pass filter for each sensor is clearly distinct from each other, in the case for several sensors working at the same time. Using a standard 105/125 step-index multimode fiber (MMF) a simple discrete level sensor was fabricated, that can also discriminate the refractive index (RI) of the liquid during the level measurement. The MMI liquid level sensors are not only inexpensive, but their fabrication is simple. © 2011 IEEE.

Antonio-Lopez J.E.,National Institute of Astrophysics, Optics and Electronics | Antonio-Lopez J.E.,University of Central Florida | Sanchez-Mondragon J.J.,National Institute of Astrophysics, Optics and Electronics | LiKamWa P.,University of Central Florida | May-Arrioja D.A.,Autonomous University of Tamaulipas
Optics Letters | Year: 2011

A novel (to the best of our knowledge) liquid level sensor based on multimode interference (MMI) effects is proposed and demonstrated. By using a multimode fiber (MMF) without cladding, known as no-core fiber, liquids around the MMF modify the self-imaging properties of the MMI device and the liquid level can be detected. We show that the sensor exhibits a highly linear response with the sensing range and multiplexed operations easily controlled by just modifying the length of the no-core fiber. At the same time, we can measure the refractive index of the liquid based on the maximum peak wavelength shift. We can also use the sensor for continuous and discrete liquid level sensing applications, thus providing a liquid level sensor that is inexpensive with a very simple fabrication process. © 2011 Optical Society of America.

Panduro M.A.,Autonomous University of Tamaulipas | Foltz H.,University of Texas–Pan American
IEEE Antennas and Propagation Society, AP-S International Symposium (Digest) | Year: 2013

A synthesis of energy patterns for UWB antenna arrays is presented in this paper. This synthesis regards the optimization of the positions of the antenna elements in a linear geometry. The well-known method of Differential Evolution (DE) is utilized for this optimization problem. A single Vivaldi antenna is simulated by using the commercially available CST Microwave Studio software. The electric field for the array is determined in according to the superposition principle. Simulation results for the optimized non-uniform array are provided. © 2013 IEEE.

Devesa-Rey R.,University of Vigo | Bustos G.,Autonomous University of Tamaulipas | Cruz J.M.,University of Vigo | Moldes A.B.,University of Vigo
Bioresource Technology | Year: 2011

The objective of this work was to study the entrapped conditions of activated carbon in calcium-alginate beads for the clarification of winery wastewaters. An incomplete 33 factorial design was carried out to study the efficiency of activated carbon (0.5-2%); sodium alginate (1-5%); and calcium chloride (0.050-0.900M), on the following dependent variables: colour reduction at 280, 465, 530 and 665nm. The activated carbon and calcium chloride were the most influential variables in the colour reduction. Nearly 100% colour reductions were found for the wavelengths assayed when employing 2% of activated carbon, 5% of sodium alginate and intermediate concentrations of calcium chloride (0.475M). Instead, other conditions like, 2% of activated carbon, 4% of sodium alginate and 0.580M of calcium chloride can also give absorbance reductions close to 100%. © 2011 Elsevier Ltd.

Guzman-Sepulveda J.R.,Autonomous University of Tamaulipas | May-Arrioja D.A.,Autonomous University of Tamaulipas
Optics Express | Year: 2013

A curvature fiber optic sensor using a two-core fiber (TCF) is proposed and demonstrated. The TCF is designed to operate as a directional coupler with one core located exactly at the center of the fiber and the other off-axis, but close to the center of the fiber. This design allows straightforward splicing of the TCF to single mode fibers (SMF), and alignment of the off-axis core is not strictly required for optimum operation. The sensor is fabricated by simply splicing a 5 cm long section of TCF between two SMF sections, which provides a sinusoidal spectral response. When the fiber is bent, the coupling parameters are modified due to stress-optic and effective length effects, effectively blue-shifting the sinusoidal spectral response of the sensor and allowing for the measurement of curvature. The sensor exhibits linear response and a sensitivity of -137.87 nm/m-1 for curvature ranging from 0 to 0.27 m-1, making it suitable to measure small curvatures with high sensitivity. ©2013 Optical Society of America.

Ramirez J.A.,Autonomous University of Tamaulipas | Uresti R.M.,Autonomous University of Tamaulipas | Velazquez G.,Autonomous University of Tamaulipas | Vazquez M.,University of Santiago de Compostela
Food Hydrocolloids | Year: 2011

The restructuring process offers to fish processors the opportunity to obtain new products, taking advantage of both low-value fish species and remains from filleting and other processing operations. However, mechanical and functional properties of restructured products depend on the biochemical and physicochemical properties of muscle proteins, mainly myosin and actomyosin. In this regard, the biochemistry of fish muscle is different from that of mammals and birds. Therefore, fish products must be processed in a different way from red meat or poultry. The main fish products are surimi and restructured products. Fish products can be improved or modified by using hydrocolloids (carbohydrates and protein) as additives. In this review, the modern technology to obtain these products, the applications of hydrocolloids in fish products, and the implications of the increasing demand for healthy, low-salt fish products are discussed. © 2011 Elsevier Ltd.

Guzman-Sepulveda J.R.,Autonomous University of Tamaulipas
Sensors (Basel, Switzerland) | Year: 2013

A simple and compact fiber optic sensor based on a two-core fiber is demonstrated for high-performance measurements of refractive indices (RI) of liquids. In order to demonstrate the suitability of the proposed sensor to perform high-sensitivity sensing in a variety of applications, the sensor has been used to measure the RI of binary liquid mixtures. Such measurements can accurately determine the salinity of salt water solutions, and detect the water content of adulterated alcoholic beverages. The largest sensitivity of the RI sensor that has been experimentally demonstrated is 3,119 nm per Refractive Index Units (RIU) for the RI range from 1.3160 to 1.3943. On the other hand, our results suggest that the sensitivity can be enhanced up to 3485.67 nm/RIU approximately for the same RI range.

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