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Search Results: 1 - 10 of 486917 matches for " Miguel A. González "
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A Comparative Study of Non-Volatile Compounds Present in 3R4F Cigarettes and iQOS Heatsticks Utilizing GC-MS  [PDF]
Miguel Pe?in Iba?ez, Daniel Martin, Alicia González Gonzálvez, Helmut H. Telle, ángel González Ure?a
American Journal of Analytical Chemistry (AJAC) , 2019, DOI: 10.4236/ajac.2019.103007
Abstract: It is now widely suggested that people who are dependent on nicotine should switch from ordinary tobacco smoking to alternative products, which at least reduce the overall harm from smoking. A number of alternatives are now popular, including electronic cigarettes and heatsticks. In this work comparative analysis of the smoke/aerosol emission from 3R4F standard cigarettes and iQOS heatsticks was undertaken. For this, gas chromatography-mass spectrometry (GC-MS) analysis was applied, to measure the non-volatile compounds of smoke/aerosol emission from individual samples, with the specific aim to determine their content of nicotine and selected other main components. All measurement data were collected under the Health Canada Intense (HCI) puffing regime. The most relevant findings of the present investigation can be summarized as follows. First, the number of measured aerosol components in the iQOS samples, with respect to those of 3R4F samples, was significantly lower (notably 37 versus 12 components). Second, the analysis of the iQOS and 3R4F GC-MS chromatographic fingerprints indicated a non-nicotine global component reduction (number and areas excluding nicotine) of larger than 80% for the iQOS samples in comparison to 3R4F samples. Third, the nicotine content of the iQOS aerosol was less than half that contained in the 3R4F smoke. The results from the present investigation indicate that—except for nicotine—smokers are exposed to a largely reduced number and amount of non-volatile, non-nicotine components in the iQOS heatstick aerosol, in comparison to those in the 3R4F cigarette smoke.
El pozo y abasto de nieve del cabildo de la catedral de Ourense
González García, Miguel ángel
Cuadernos de Estudios Gallegos , 1999,
Abstract: Not avalaible No disponible
Thoracic Epidural Morphine for Postoperative Analgesia after Hemiclamshell Incision in Castleman Disease  [PDF]
Borja Mugabure,María Eizaguirre,Silvia González,José Miguel Izquierdo
Open Journal of Anesthesiology (OJAnes) , 2013, DOI: 10.4236/ojanes.2013.33036
Abstract: The hemiclamshell incision is a valid but infrequent surgical alternative for the resection of tumors from mediastinum. This point makes this approach impossible to be studied under a randomized controlled trial. The triple association of thoracotomy, sternotomy and cervicothomy makes the hemiclamshell approach a high intensity postoperative pain surgery. However, there is no published data on this topic, and the reviewed articles only mention the analgesic regimens as a secondary point. Indeed, no author defines the best epidural drugs mixture for the patients. Multimodal analgesic regimen based on regional anesthesia should be used. Based on the recent advances on spinal opioids, morphine could be a good choice as epidural coadjutant to local anesthetics for hemiclamshell incision.
Contención de padres en crisis. Comunicación y manejo de los padres de RN en riesgo de morir
María A. González,Miguel Larguía,Celia Lomuto
Revista del Hospital Materno Infantil Ramón Sardá , 2007,
Abstract:
Thoracic Epidural Morphine for Postoperative Analgesia after Hemiclamshell Incision in Castleman Disease  [PDF]
Borja Mugabure, María Eizaguirre, Silvia González, José Miguel Izquierdo, Borja Aguinagalde, Javier Martín, Pedro Martínez
Open Journal of Anesthesiology (OJAnes) , 2013, DOI: 10.4236/ojanes.2013.33036
Abstract:

The hemiclamshell incision is a valid but infrequent surgical alternative for the resection of tumors from mediastinum. This point makes this approach impossible to be studied under a randomized controlled trial. The triple association of thoracotomy, sternotomy and cervicothomy makes the hemiclamshell approach a high intensity postoperative pain surgery. However, there is no published data on this topic, and the reviewed articles only mention the analgesic regimens as a secondary point. Indeed, no author defines the best epidural drugs mixture for the patients. Multimodal analgesic regimen based on regional anesthesia should be used. Based on the recent advances on spinal opioids, morphine could be a good choice as epidural coadjutant to local anesthetics for hemiclamshell incision.

Hydrolysis of Trivalent Holmium in Aqueous Solutions of 2 M Ionic Strength by Spectrophotometric and Potentiometric Methods  [PDF]
Miguel Angel Hernández-García, Hilario López-González, Alberto Rojas-Hernández
Advances in Materials Physics and Chemistry (AMPC) , 2015, DOI: 10.4236/ampc.2015.55017
Abstract: The first hydrolysis constants of trivalent holmium in 2 M NaClO4 and 2 M NaCl at 303 K and in CO2 free conditions were determined. The pCH borderlines of precipitation and first hydrolysis were determined by means of a spectrophotometric method and last one with the program SQUAD. Independently, the stability constant for the first hydrolytic species was determined, by means of potentiometric pH titrations whose data were treated with the program SUPERQUAD. The hydrolysis constants obtained were: \"\"?and \"\". These values attained by both methods are the same. The log10β1,Cl constants for the species HoCl2+ was also calculated for 2 M ionic strength and 303 K from the hydrolysis constant obtained in both perchlorate and chloride media. This value was logβ1,Cl = -0.56.
Valor diagnóstico del tránsito intestinal con doble contraste
Rodríguez Allende,Miguel A; Prado González,José A;
Revista Cubana de Medicina , 2004,
Abstract: a prospective study was conducted to stress the value of the double contrast barium enema technique in the diagnosis of the small intestine affections. 76 patients that were applied this technique were screened and compared with the conventional technique. the results of the doble contrast study in the diagnosis of affections of the small intestine were positive in 89.5 % and negative in 10.5 %. in every case, the diagnosis was confirmed with other techniques. the results were as follows: sensitivity, 100 %; specificity, 97 %; and positive predictive values, 98.7 %. a description of the technique was made, and its characteristics and advantages were explained.
Valor diagnóstico del tránsito intestinal con doble contraste Diagnostic value of double-contrast barium enema
Miguel A Rodríguez Allende,José A Prado González
Revista Cubana de Medicina , 2004,
Abstract: Se realizó un trabajo prospectivo para destacar el valor de la técnica de tránsito intestinal con doble contraste en el diagnóstico de las afecciones del intestino delgado. Se exploraron 76 pacientes a los que se les aplicó dicha técnica y fue comparada con la técnica convencional. Los resultados del estudio con doble contraste en el diagnóstico de las afecciones del intestino delgado fueron positivos en el 89,5 % y negativos en el 10,5 %. En todos los casos el diagnóstico se confirmó con otras técnicas. Los resultados fueron: sensibilidad de 100 %, especificidad de 97 % y valores predictivos positivos de 98,7 %. Se hizo una descripción de la técnica y se expusieron sus características y las ventajas de su empleo. A prospective study was conducted to stress the value of the double contrast barium enema technique in the diagnosis of the small intestine affections. 76 patients that were applied this technique were screened and compared with the conventional technique. The results of the doble contrast study in the diagnosis of affections of the small intestine were positive in 89.5 % and negative in 10.5 %. In every case, the diagnosis was confirmed with other techniques. The results were as follows: sensitivity, 100 %; specificity, 97 %; and positive predictive values, 98.7 %. A description of the technique was made, and its characteristics and advantages were explained.
Computed Tomography and Magnetic Resonance Imaging Features of the Temporomandibular Joint in Two Normal Camels
Alberto Arencibia,Diego Blanco,Nelson González,Miguel A. Rivero
Anatomy Research International , 2012, DOI: 10.1155/2012/242065
Abstract: Computed tomography (CT) and magnetic resonance (MR) image features of the temporomandibular joint (TMJ) and associated structures in two mature dromedary camels were obtained with a third-generation equipment CT and a superconducting magnet RM at 1.5 Tesla. Images were acquired in sagittal and transverse planes. Medical imaging processing with imaging software was applied to obtain postprocessing CT and MR images. Relevant anatomic structures were identified and labelled. The resulting images provided excellent anatomic detail of the TMJ and associated structures. Annotated CT and MR images from this study are intended as an anatomical reference useful in the interpretation for clinical CT and MR imaging studies of the TMJ of the dromedary camels. 1. Introduction The temporomandibular joint (TMJ) is a synovial condylar joint between the base of the zygomatic process of the temporal bone and the condylar process of the mandible; its main articular components are the synovial pouches, articular disc, caudal and lateral ligaments, and joint capsule [1]. In veterinary medicine, the exploration of the anatomical structures located in the TMJ and the evaluation of the soft tissues turn out to be laborious due to its complex anatomical organization [2–5], which makes it difficult to diagnose morphological alterations by means of physical exploration and conventional radiographic studies [6–8]. Nowadays, modern image-based diagnostic techniques, especially computed tomography (CT) [9–14], and magnetic resonance imaging (MRI) [15–21], make possible to obtain body sections from different tomographic planes, achieving images with a good anatomical resolution, high contrast between different structures, and excellent tissue-like differentiation. The applications of CT and MRI have revolutionized the practice of veterinary diagnostic imaging. In large animals, several studies have demonstrated the clinical value of CT and MRI of the TMJ [22–25]. To the author’s knowledge, there is no published material describing the results of CT and MRI of the mature camel TMJ. An accurate interpretation of the CT and MRI normal anatomy is necessary for the evaluation of pathological tissues. The objective of this study was to provide an overview of the normal anatomy of the TMJ of the dromedary camel using CT, MR images, and transverse gross anatomical section. 2. Methods 2.1. Animals Two male mature dromedary camels’ cadaver heads were used for this study. One was from a 4-year-old (525?kg bodyweight) and the other from an 8-year-old (638?kg bodyweight) one. Camels were dead
On the Feasibility of Interoperable Schemes in Hand Biometrics
Aythami Morales,Ester González,Miguel A. Ferrer
Sensors , 2012, DOI: 10.3390/s120201352
Abstract: Personal recognition through hand-based biometrics has attracted the interest of many researchers in the last twenty years. A significant number of proposals based on different procedures and acquisition devices have been published in the literature. However, comparisons between devices and their interoperability have not been thoroughly studied. This paper tries to fill this gap by proposing procedures to improve the interoperability among different hand biometric schemes. The experiments were conducted on a database made up of 8,320 hand images acquired from six different hand biometric schemes, including a flat scanner, webcams at different wavelengths, high quality cameras, and contactless devices. Acquisitions on both sides of the hand were included. Our experiment includes four feature extraction methods which determine the best performance among the different scenarios for two of the most popular hand biometrics: hand shape and palm print. We propose smoothing techniques at the image and feature levels to reduce interdevice variability. Results suggest that comparative hand shape offers better performance in terms of interoperability than palm prints, but palm prints can be more effective when using similar sensors.
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