Time filter

Source Type

Chihuahua, Mexico

The Autonomous University of Chihuahua is a Mexican public university based in the city of Chihuahua, Chihuahua, but with several campuses across the state. In December 8, 1954 the State Legislature, with Governor Oscar Soto Maynez, issued the decree 171, which founded the Autonomous University of Chihuahua .UACh was granted its autonomy in 1968, with the freedom to define its own curriculum and manage its own budget without interference from the government. Wikipedia.

Ramirez-Amador V.,Metropolitan Autonomous University | Anaya-Saavedra G.,Metropolitan Autonomous University | Martinez-Mata G.,Autonomous University of Chihuahua
Oral Oncology | Year: 2010

Important advances in Kaposi's sarcoma (KS) knowledge have been achieved, but KS is still a dilemma. It is an angioproliferative disorder classified as an intermediate neoplasm due to the absence of conventional clinical features of malignancy, but at the moment, it remains unclear if KS could be considered a reactive proliferation of endothelial cells and spindle cells, a true malignancy or both. In this review, the authors address the main epidemiological, clinical, and biological features, of the five types of KS, with emphasis on KS affecting the head and neck region. Also, a revision is done in relation with transmission, the role of saliva, and the pathogenic events associated with human herpesvirus type-8 (HHV-8). Treatment options are revised, highlighting the need for future approaches focused on targeting signaling pathways. © 2009 Elsevier Ltd. All rights reserved.

Chacon-Acosta G.,Metropolitan Autonomous University | Hernandez-Hernandez H.H.,Autonomous University of Chihuahua
International Journal of Modern Physics D | Year: 2015

In this work we study a completely degenerate Fermi gas at zero temperature by a semiclassical approximation for a Hamiltonian that arises in polymer quantum mechanics. Polymer quantum systems are quantum mechanical models quantized in a similar way as in loop quantum gravity, allowing the study of the discreteness of space and other features of the loop quantization in a simplified way. We obtain the polymer modified thermodynamical properties for this system by noticing that the corresponding Fermi energy is exactly the same as if one directly polymerizes the momentum pF. We also obtain the expansion of the corresponding thermodynamical variables in terms of small values of the polymer length scale λ. We apply these results to study a simple model of a compact one-dimensional star where the gravitational collapse is supported by electron degeneracy pressure. As a consequence, polymer corrections to the mass of the object are found. By using bounds for the polymer length found in Bose-Einstein condensates experiments we compute the modification in the mass of the compact object due to polymer effects of order ~ 10-8. This result is similar to the other order found by different approaches such as generalized uncertainty principle (GUP), and that certainly is within the error reported in typical measurements of white dwarf masses. © 2015 World Scientific Publishing Company.

Rodrigueza S.,Autonomous University of Chihuahua
Acta Horticulturae | Year: 2012

The need of producing more food is clear around the world. Climatic change and water scarcity make this duty a hard and expensive task in certain arid places such as the State of Chihuahua, Mexico. In this arid zone there is a huge need for water in order to produce feed for fattening cattle. Cattle need to be fed with a special diet in which proteins must be provided. Proteins can be found in green fodder and it can be made up from different crop sources such as oat, barley or wheat, among others. The average water waste to produce a kilogram of dry matter fodder out of wheat by the traditional method is 505 L, and therefore sustainable production is so crucial. One of the most viable, sustainable and low water consumption ways to produce fodder is using hydroponic techniques. The average water consumption to produce wheat hydroponic green fodder (HGF) is 2 L. The HGF we produced was tested in 10 cattle heads with different weights. The water savings found varied from 690 to 2100 L, which represents a key alternative for agriculture in arid places like Chihuahua. Taking into consideration that the human population is growing worldwide, HGF production represents a great sustainable way to increase meat production in order to meet population increasing demands.

Lino-Silva L.S.,Instituto Nacional Of Cancerologia | Salcedo-Hernandez R.A.,Instituto Nacional Of Cancerologia | Caro-Sanchez C.H.,Autonomous University of Chihuahua
Colorectal Disease | Year: 2012

Aim Micropapillary carcinoma (MPC) is regarded as an aggressive variant of adenocarcinoma in any location. The reported proportion of a micropapillary carcinoma component in an entire tumour ranges from 5 to 95% and only one case of pure MPC has been reported. To date, approximately 130 cases of MPC in the colorectum have been reported, but it is likely that this small number is to some extent due to under-reporting because this pattern is not well recognized by the general pathologist. All previous studies have combined colonic and rectal primary tumours and most have only analysed patients with clinical Stages I or II. Method We analysed 15 cases of MPC of the colon alone, diagnosed in our institution, and compared them with 105 conventional carcinomas of the colon. Results An MPC component was present in 10% of all colonic carcinomas. These tumours presented at a median age of 56years, and all were of American Joint Committee on Cancer Stages III and IV. Subserosal tissue invasion was present in every case, 60% had more than four positive lymph nodes, 60% were accompanied by poorly differentiated conventional carcinoma, 40% had had an incomplete resection and a third demonstrated lymphovascular invasion. Despite these adverse prognostic factors, tumours containing MPC showed the same survival, stage by stage, as conventional adenocarcinoma in multivariate analysis, although 3-year survival (81.7%vs 87.3%, P=0.035) was worse on univariate analysis. Conclusion The histopathologist should be aware of the possibility of MPC. Three-year survival is worse than in patients with conventional colonic carcinomas in Stage III. © 2012 The Authors. Colorectal Disease © 2012 The Association of Coloproctology of Great Britain and Ireland.

Ortega-Rivas E.,Autonomous University of Chihuahua
Food and Bioprocess Technology | Year: 2011

Pasteurisation of fruit juices is normally carried out by thermal means. Heat treatment is an efficient technology for pasteurisation, but may also cause impairment of nutritive and sensory attributes. High-voltage pulsed electric field (PEF) treatment is a promising non-thermal processing method for pasteurisation of liquid foods. Sensory quality of fruit juices is important for consumers. PEF lends itself to be employed as an alternative to produce fruit juices of high quality and safe for consumption, and yet its practical application has been really limited. This paper reviews research carried out recently about the potential use of PEF to different fruit juices, aimed at employing the technology at industrial scale in order to search for wider commercialisation. © 2009 Springer Science + Business Media, LLC.

Discover hidden collaborations