201
|
López J, Balart R, Jiménez A. Influence of crystallinity in the curing mechanism of PVC plastisols. J Appl Polym Sci 2003. [DOI: 10.1002/app.13122] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
202
|
Martínez JM, Bermúdez C, Becerra C, López J, Morales WJ, Quintero RA. The role of Doppler studies in predicting individual intrauterine fetal demise after laser therapy for twin-twin transfusion syndrome. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2003; 22:246-251. [PMID: 12942495 DOI: 10.1002/uog.215] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
OBJECTIVE To investigate the role of Doppler studies in predicting individual fetal demise in patients scheduled for selective laser photocoagulation of communicating vessels (SLPCV) for twin-twin transfusion syndrome (TTTS). METHODS Doppler studies of the umbilical artery, umbilical vein, ductus venosus, tricuspid valve regurgitation and middle cerebral artery were performed in the donor and recipient twins before and 24 hours after SLPCV. Results were analyzed cross-sectionally and longitudinally. As multiple comparisons were made, an a priori alpha rejection was set at P < 0.001. RESULTS One hundred and ten consecutive patients were available for analysis. Overall fetal survival was 68.6% (151/220) with at least one survivor in 88.2% (97/110) of cases. Absent or reversed end-diastolic velocity in the umbilical artery of the donor twin was the only preoperative Doppler result predictive of intrauterine fetal demise (IUFD) (10/15, 66.7%, P < 0.001). Postoperatively, reversed flow during atrial contraction in the ductus venosus of the donor twin showed a trend towards prediction of IUFD of this fetus (4/5, 80%, P = 0.007). No other Doppler studies, including the longitudinal analyses, were predictive of IUFD. CONCLUSIONS Our data suggest that preoperative absent or reversed end-diastolic velocity in the umbilical artery may be useful in predicting individual fetal demise of the donor twin in TTTS patients scheduled for SLPCV. This may reflect the role of decreased individual placental mass that may be associated with some donor twins. The inability of other Doppler studies to predict individual IUFD may be explained preoperatively by the effect of the interfetal vascular connections on the individual Doppler signals and postoperatively by the effect of surgery or the timing of the assessment. Our findings may be important in patient counseling, in furthering understanding of the disease, and perhaps in improving surgical technique.
Collapse
|
203
|
Alvarez R, García R, Luis J, López J, Gutiérrez A, González M, del Río L, Aguilera F, Vázquez R. [Bone mineral density in children with osteogenesis imperfecta]. REVISTA ESPANOLA DE MEDICINA NUCLEAR 2003; 22:224-8. [PMID: 12846946 DOI: 10.1016/s0212-6982(03)72190-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECT Osteogenesis imperfecta is the term used for a group of disorders of collagen synthesis which cause increased bone fragility. The aim of our study was to evaluate the BMD in patients with OI. MATERIAL AND METHODS We used dual-energy x ray absorptiometry, Hologic QDR 4500W (DEXA), to compare the bone mineral density (BMD) of 8 patients aged from 3 years to 20 years who had osteogenesis imperfecta with an age and sex matched control group. RESULTS DEXA detected highly significant differences in BMD respecting control group. The mean BMD in the patients with osteogenesis imperfecta was 62.6 % of normal in lumbar spine (p < 0.01) and 63.01 % of normal in the femoral neck (p < 0.01) using Wilcoxon test. CONCLUSION DEXA is an objective, reproductible and sensitive method of measurement of BMD in children. It may help to stablish the diagnosis, to asses prognosis and possibly to monitor the response to different types of treatment.
Collapse
|
204
|
Salas M, Urrestarazu M, López J. EFFECT OF IBA APPLICATION BY FERTIGATION ON MELON IN SOILLESS CULTURE. ACTA ACUST UNITED AC 2003. [DOI: 10.17660/actahortic.2003.609.32] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
205
|
Portela J, Sanchez-Oneto J, López J, Nebot E, Martínez de la Ossa E. Hydrothermal Oxidation of Oily Wastes: an Alternative to Conventional Treatment Methods. Eng Life Sci 2003. [DOI: 10.1002/elsc.200390011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
|
206
|
Quesada J, Aceituno L, Rodríguez R, Barqueros A, López J, Olivar M. Torsión tubárica en una niña de 11 años. CLINICA E INVESTIGACION EN GINECOLOGIA Y OBSTETRICIA 2003. [DOI: 10.1016/s0210-573x(03)77239-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
207
|
Aboitiz F, Montiel J, López J. Critical steps in the early evolution of the isocortex: insights from developmental biology. Braz J Med Biol Res 2002; 35:1455-72. [PMID: 12436188 DOI: 10.1590/s0100-879x2002001200006] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This article proposes a comprehensive view of the origin of the mammalian brain. We discuss i) from which region in the brain of a reptilian-like ancestor did the isocortex originate, and ii) the origin of the multilayered structure of the isocortex from a simple-layered structure like that observed in the cortex of present-day reptiles. Regarding question i there have been two alternative hypotheses, one suggesting that most or all the isocortex originated from the dorsal pallium, and the other suggesting that part of the isocortex originated from a ventral pallial component. The latter implies that a massive tangential migration of cells from the ventral pallium to the dorsal pallium takes place in isocortical development, something that has not been shown. Question ii refers to the origin of the six-layered isocortex from a primitive three-layered cortex. It is argued that the superficial isocortical layers can be considered to be an evolutionary acquisition of the mammalian brain, since no equivalent structures can be found in the reptilian brain. Furthermore, a characteristic of the isocortex is that it develops according to an inside-out neurogenetic gradient, in which late-produced cells migrate past layers of early-produced cells. It is proposed that the inside-out neurogenetic gradient was partly achieved by the activation of a signaling pathway associated with the Cdk5 kinase and its activator p35, while an extracellular protein called reelin (secreted in the marginal zone during development) may have prevented migrating cells from penetrating into the developing marginal zone (future layer I).
Collapse
|
208
|
Quintero RA, Martínez JM, Bermúdez C, López J, Becerra C. Fetoscopic demonstration of perimortem feto-fetal hemorrhage in twin-twin transfusion syndrome. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2002; 20:638-639. [PMID: 12493060 DOI: 10.1046/j.1469-0705.2002.00859.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
|
209
|
Cano J, Torres A, Abad M, Barral L, Díez F, López J, Ramírez C. Characterization of an ABS-modified epoxy system. POLYM INT 2002. [DOI: 10.1002/pi.940] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
210
|
Baricelli P, López J, Lujano E, Linares FL. Synthesis, characterization and catalytic applications in aqueous-biphase system of a new tungsten complex W(CO)3(CH3CN)(TPPTS)2. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s1381-1169(02)00066-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
211
|
Fernández JM, Robles JE, Regojo JM, López J, Sánchez D, Arocena J, Rosell D, Zudaire JJ, Berián JM. [Renal lithiasis due to indinavir]. REVISTA DE MEDICINA DE LA UNIVERSIDAD DE NAVARRA 2002; 46:28-32. [PMID: 12685114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Indinavir sulphate is a protease inhibitor that has been found to be extremely effective in increasing CD4+ cell counts and in decreasing HIV-RNA titers in patients with HIV and AIDS. However, patients receiving indinavir also have been noted to have a significant risk of developing urolithiasis. Indinavir has high urinary excretion with poor solubility in a physiologic pH solution. The typical symptoms of indinavir urolithiasis are similar to other forms of urolithiasis. Indinavir urolithiasis is unique in that computed tomography, which was once thought to be efficacious in identifying all urinary calculi, is not useful in imaging stones that are composed of pure indinavir. Indinavir urolithiasis generally responds to a conservative regimen of hydration, pain control, and temporary discontinuation of the medication. Only a minority of patients need surgical intervention.
Collapse
|
212
|
Abad MJ, Ares A, Barral L, Cano J, Díez FJ, López J, Ramírez C. Characterization of biaxially oriented polypropylene films by atomic force microscopy and microthermal analysis. J Appl Polym Sci 2002. [DOI: 10.1002/app.10787] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
213
|
López J, Ramírez C, Abad MJ, Barral L, Cano J, Díez FJ. Blends of acrylonitrile-butadiene-styrene with an epoxy/cycloaliphatic amine resin: Phase-separation behavior and morphologies. J Appl Polym Sci 2002. [DOI: 10.1002/app.10715] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
214
|
Sola E, García I, Burgos D, Cabello M, Alférez MJ, López J, Fernández M, Mellado JM, Campos J, González Molina M. [Nephropathy caused by polyomavirus type BK in renal transplantation]. Nefrologia 2002; 21:548-55. [PMID: 11881424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
|
215
|
Montané J, Marco I, Manteca X, López J, Lavín S. Delayed acute capture myopathy in three roe deer. JOURNAL OF VETERINARY MEDICINE. A, PHYSIOLOGY, PATHOLOGY, CLINICAL MEDICINE 2002; 49:93-8. [PMID: 11958473 DOI: 10.1046/j.1439-0442.2002.jv409.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Delayed acute capture myopathy is the term used to describe the clinical syndrome observed in three roe deer captured by drive-nets and transported to an enclosure for scientific purposes. The animals died 48 h, 60 h and 8 days after being captured. The simultaneous deaths coincided with a previous episode of deliberate human disturbance. The histopathological findings were indicative of acute myopathy and myoglobinaemic nephrosis. These could be related to an ataxic myoglobinuric syndrome brought on by capture and transport operations. The lack of clinical signs and negative prognosis indicators in the period between capture and just before death. the absence of gross muscular lesions in the animal that died after 8 days post-capture, the simultaneous deaths of animals captured at different times and the evidence of deliberate human disturbance in the enclosure are suggestive of death triggered by a second stress episode.
Collapse
|
216
|
Fernández R, Martínez C, Camarero E, López J, Paul L, Pinto I. Embolización en el síndrome de Wünderlich. Cir Esp 2002. [DOI: 10.1016/s0009-739x(02)71928-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
217
|
Robles R, Parrilla P, Ramírez P, Sánchez F, López J, Marín C, Luján J, Rodríguez J, Fernández J, Sansano T. Bipartición hepática en pacientes con metástasis hepáticas como método de aprendizaje en el trasplante hepático de donante vivo en adultos. Cir Esp 2002. [DOI: 10.1016/s0009-739x(02)71916-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
218
|
Barral L, Cano J, Díez FJ, López J, Ramírez C, Abad MJ, Ares A. Analysis of blends of poly(styrene-co-acrylonitrile) with an epoxy/aromatic amine resin using scanning thermal microscopy. ACTA ACUST UNITED AC 2001. [DOI: 10.1002/polb.10087] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
219
|
Hervás J, Chacón-Manrique de Lara F, López J, Gómez-Villamandos JC, Guerrero MJ, Moreno A. Granulomatous (pseudotumoral) iridociclitis associated with leishmaniasis in a cat. Vet Rec 2001; 149:624-5. [PMID: 11761295 DOI: 10.1136/vr.149.20.624] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
220
|
Portela JR, López J, Nebot E, Martínez de la Ossa E. Elimination of cutting oil wastes by promoted hydrothermal oxidation. JOURNAL OF HAZARDOUS MATERIALS 2001; 88:95-106. [PMID: 11606243 DOI: 10.1016/s0304-3894(01)00295-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Cutting oils are emulsionable fluids widely used in metalworking processes. Their composition is normally oil, water, and additives (fatty acids, surfactants, biocides, etc.) generating a toxic waste after a long use. Generally, it is a waste too dilute to be incinerated and it is difficult to treat biologically. Other conventional treatment methods currently used are not satisfactory from the environmental point of view. Wet air oxidation (WAO) and supercritical water oxidation (SCWO) are two forms of hydrothermal oxidation that have been proved to be effective processes to treat a wide variety of industrial wastes, but hardly tested for oily wastes. In the case of refractory wastes, WAO process is not efficient enough due to the moderate temperatures used. SCWO is a more powerful process since operating temperatures are usually around 600 degrees C, but the use of severe conditions leads to major disadvantages in the commercialization of the technology. In order to enhance WAO and SCWO efficiency at mild conditions, the use of free radical promoters has been studied in this work. Both normal and promoted hydrothermal oxidation have been tested to treat cutting oil wastes in a continuous flow system operating at 300-500 degrees C. Hydrogen peroxide has been used both as a source of oxygen and as a source of free radicals by introducing it into the reactor with or without previous thermal decomposition, respectively. Organic material is easily oxidized in both cases, obtaining more than 90% TOC reduction in less than 10s at 500 degrees C. At lower temperatures, the use of promoters clearly enhances the oxidation process. Activation energies have been estimated for normal and promoted oxidation processes.
Collapse
|
221
|
Costas RC, López J. Application of the sequential elution technique to determine Cd and Cu cellular location in Ulva lactuca Linnaeus. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2001; 41:427-435. [PMID: 11598779 DOI: 10.1007/s002440010268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2001] [Accepted: 05/12/2001] [Indexed: 05/23/2023]
Abstract
The sequential elution technique, used to determine the cellular location of metals in nonvascular plants, was adapted to the seaweed Ulva lactuca Linnaeus for the heavy metals Cu and Cd. The optimum conditions for the extraction of extracellular Cu and Cd were determined using specimens previously loaded with these metals. The best extracellular metal extraction media and the number of extracellular metal extraction steps obtained were the following: Two steps (1 h + 40 min) in a filtered sea water-20 mM Ni solution for Cd and two steps in a filtered sea water-50 mM Co solution for Cu. To find these extraction conditions the extracellular metal extraction capacity of the different media used as well as the alteration provoked in plasmalemma permeability were compared. The concentrations of the incubation solutions of Cd and Cu that allowed reliable comparisons between the different extracellular metal extraction media used were previously determined.
Collapse
|
222
|
López J, Ramírez C, Torres A, Abad MJ, Barral L, Cano J, Díez FJ. Isothermal curing by dynamic mechanical analysis of three epoxy resin systems: Gelation and vitrification. J Appl Polym Sci 2001. [DOI: 10.1002/app.10023] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
223
|
Piñero Madrona A, Robles R, López J, Montoya M, Aguayo JL, Sánchez-Bueno F, Parrilla P. Evolution of the need for operation for peptic pyloric stenosis over a period of 24 years (1976-1999). THE EUROPEAN JOURNAL OF SURGERY = ACTA CHIRURGICA 2001; 167:758-60. [PMID: 11775727 DOI: 10.1080/11024150152707734] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
OBJECTIVE To analyse the need for operation for pyloric stenosis caused by duodenal ulcer over a period of 24 years (1976-1999). DESIGN Retrospective study. SETTING University hospital, Spain. SUBJECTS 156 patients operated on for peptic pyloric stenosis. MAIN OUTCOME MEASURES The number of patients operated on yearly were grouped into 4-year periods for statistical comparison. RESULTS The number of cases operated on each year steadily decreased between 1976 and 1999. In the 1988-1991 period there was a significant reduction (p <0.05), which continued over the next two 4-year periods, particularly the last (p <0.01). CONCLUSION Although we cannot use this study to establish a direct relation between the decrease in the indication for operations for peptic pyloric stenosis and the use of H2 antagonists, proton pump inhibitors, or treatment to eradicate Helicobacter pylori, we did find a significance difference between the years before and after the introduction of these drugs.
Collapse
|
224
|
Montané J, Marco I, López J, Manteca X, Lavín S. Multiple bilateral fractures of the lumbar transverse processes in a roe deer (Capreolus capreolus). J Zoo Wildl Med 2001; 32:387-90. [PMID: 12785691 DOI: 10.1638/1042-7260(2001)032[0387:mbfotl]2.0.co;2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Multiple bilateral fractures of the lumbar transverse processes were radiographically identified postmortem in a recently captured roe deer (Capreolus capreolus). These fractures were probably caused by an avulsion of the psoas major occurring during introduction into the transport box. The deer probably died from shock caused by the fractures, muscle damage, and subsequent hemorrhage. Although easily overlooked, fractured lumbar transverse processes may indicate inadequate postcapture management practices.
Collapse
|
225
|
López J, Serrano P, Duque B, Artiles J. [Socio-economic costs of road traffic accidents in the Canary Islands, Spain, in 1997]. GACETA SANITARIA 2001; 15:414-22. [PMID: 11734154 DOI: 10.1016/s0213-9111(01)71595-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
OBJECTIVE To evaluate the economic impact in terms of direct and indirect costs road traffic accidents in Canarias Islands (Spain) in 1997. METHOD The cost-of-illness method was used. Direct and indirect costs were estimated using prevalence cost, i.e., the costs produced in 1997. Direct costs were divided into health services costs, insurance administration costs and the costs of material damage to the vehicles. Indirect costs were obtained through transformation of physical units into monetary units using the approach of human capital theory. RESULTS The total cost of road traffic accidents was 39,887.16 million pesetas, equivalent to 24,470 for each inhabitant of the Canary Islands and representing 1.3% of the GNP in this region. The total direct cost was 32,559.67 million pesetas, constituting 82% of the total, which was distributed according to the different concepts analyzed: health service costs: 2,407.40 million pesetas; insurance administration costs, 13,415.89 million pesetas and the costs of material damages to the vehicles: 16,736.38 million pesetas. The total indirect costs was 7,327.49 million pesetas, accounting for 18% of the total costs, which was distributed in premature mortality (6,884.88 million pesetas) and absenteeism from work (442.61 million pesetas). CONCLUSIONS Although this study adopts a conservative approach by omitting costs associated with pain and suffering, permanent disability, and those of at-home care provided by the family, the hight socio-economic cost of road traffic accidents clearly indicates the need for the different administrations of the Canary Islands to collaborate in implementing preventive measures.
Collapse
|