Joan Romero | Universidad Pedagogica Nacional (original) (raw)
Papers by Joan Romero
Drying Technology, 1997
The influence of the drying conditions on the enzymatic activity in hazelnut (Corylus avellana, L... more The influence of the drying conditions on the enzymatic activity in hazelnut (Corylus avellana, L.) has been studied. In this work, the activity of the enzymes lipase. peroxidase and polyphenoloxidase have been determined in hazelnuts dried under three temperatures (30, 50 and 70°C). The drying experiments were done with forced air circulation, and samples of Negret variety. unshelled and shelled, were used. It has been observed that the drying process reduces the activity of the enzymes lipase, peroxidase and polyphenoloxidase in hazelnut, and the results indicated that polyphenoloxidase is the most unstable to heat.
Drug and Alcohol Review, 2009
Introduction and Aims. In 2003, a randomised controlled trial comparing injected diacetylmorphine... more Introduction and Aims. In 2003, a randomised controlled trial comparing injected diacetylmorphine and oral methadone was carried out in Andalusia, Spain. The subsequent follow-up study evaluated the health and drug use status of participants, 2 years after the completion of the trial. Design and Methods. This follow-up cohort study was carried out between March and August 2006. Data collected included information on socio-demographics, drug use, health and health-related quality of life. We compared data collected before randomisation and at 2 years for the following three groups: those currently on heroin-assisted treatment (C-HAT), those who have discontinued HAT (D-HAT), and those who have never received HAT (N-HAT). Results. From the total 62 randomised participants in 2003, 54 (87%) were interviewed for this study. Participants were distributed as follow: C-HAT 44.4% (24), N-HAT 22.2% (12) and D-HAT 33.3% (18). Illicit heroin use had a statistically significant decrease in the three groups from baseline to 2 years post trial. Mean days of heroin use were 2.42 (SD = 3.02); 6.56 (SD = 9.48) and 13.92 (SD = 12.59) for the C-HAT, D-HAT and N-HAT groups, respectively. Those currently on HAT were the only group that sustained at 2 years, their marked improvement in health after 9 months of treatment during the trial period. Discussion and Conclusions: Patients who received HAT showed better outcomes compared with those not on HAT. The results of this study strengthen the evidence showing that HAT can improve and stabilise the health of long-term heroin users with severe comorbidities and high mortality.[Oviedo-Joekes E, March JC, Romero M, Perea-Milla E. The Andalusian trial on heroin assisted treatment: A 2 year follow-up. Drug Alcohol Rev 2009]
Journal of Electrostatics, 2009
A numerical study of laser-triggered discharges in air at atmospheric pressure is presented for a... more A numerical study of laser-triggered discharges in air at atmospheric pressure is presented for an ultraviolet laser in small gaps. Two models, one for the ionization of the air by the laser pulse and the second for the streamer evolution have been computed. From results of numerical simulations the influence of the laser parameters such as energy, pulse duration and beam radius is analyzed and electron distributions are obtained for different small gaps. Electric field, streamer velocity and evolution of the ionized volume are calculated by means of streamer simulations. This paper shows the main features of the laser-triggered discharges and also the importance of using numerical simulations in a laser-triggered experiment.
Hepatology, 1987
Since the liver is thought to be the major organ for the metabolism of renin, the rate-limiting e... more Since the liver is thought to be the major organ for the metabolism of renin, the rate-limiting enzyme in the renin-angiotensin cascade, we examined the kinetics and regulation of renin extraction by the isolated perfused rat liver. Partially purified, hog kidney renin was continuously infused into isolated rat livers perfused in a nonrecirculating manner with serum-free medium. Concentrations of renin in the portal and hepatic veins were measured by radioimmunoassay and first-pass hepatic extraction calculated. In livers from normal rats, steady-state, first-pass hepatic extraction of porcine renin ranged from 12.3 ± 0.9 to 25.5 ± 3.9% of the infused dose; at high renin infusion rates, hepatic extraction was saturable. Administration of captopril, a converting enzyme inhibitor, decreased hepatic extraction of renin by approximately 60%; enalaprilat, another converting enzyme inhibitor, had no effect. First-pass hepatic extraction of renin was also inhibited by the bile acid, taurocholate, in a dose-dependent manner. However, bilateral nephrectomy, which reduced endogenous plasma renin activity to unmeasurable levels, had no significant effect on hepatic extraction of renin by livers isolated from nephrectomized rats. These results demonstrate directly that the liver extracts renin in a dose-dependent and saturable manner, although the precise mechanism of uptake remains to be determined.
Drying Technology, 1997
The influence of the drying conditions on the enzymatic activity in hazelnut (Corylus avellana, L... more The influence of the drying conditions on the enzymatic activity in hazelnut (Corylus avellana, L.) has been studied. In this work, the activity of the enzymes lipase. peroxidase and polyphenoloxidase have been determined in hazelnuts dried under three temperatures (30, 50 and 70°C). The drying experiments were done with forced air circulation, and samples of Negret variety. unshelled and shelled, were used. It has been observed that the drying process reduces the activity of the enzymes lipase, peroxidase and polyphenoloxidase in hazelnut, and the results indicated that polyphenoloxidase is the most unstable to heat.
Atencion Primaria, 2009
Recientemente hemos asistido en nuestro centro de salud a una sesión basada en el documento de la... more Recientemente hemos asistido en nuestro centro de salud a una sesión basada en el documento de la semFYC )Manejo de las dislipemias en el paciente diabético y de riesgo coronario*, que forma parte de las )Sesiones clínicas en APS* 1 . En él se plantea un caso clínico de un varón de 63 años, sedentario, actualmente obeso, hipertenso, diabético, fumador y sin antecedentes de enfermedad vascular. Con base en los datos de las exploraciones complementarias, se le atribuye un riesgo cardiovascular alto.
Drying Technology, 1997
The influence of the drying conditions on the enzymatic activity in hazelnut (Corylus avellana, L... more The influence of the drying conditions on the enzymatic activity in hazelnut (Corylus avellana, L.) has been studied. In this work, the activity of the enzymes lipase. peroxidase and polyphenoloxidase have been determined in hazelnuts dried under three temperatures (30, 50 and 70°C). The drying experiments were done with forced air circulation, and samples of Negret variety. unshelled and shelled, were used. It has been observed that the drying process reduces the activity of the enzymes lipase, peroxidase and polyphenoloxidase in hazelnut, and the results indicated that polyphenoloxidase is the most unstable to heat.
International Review of Hydrobiology, 2001
We studied the planktonic food web in eutrophic Sau Reservoir (Catalonia, NE Spain). Along the lo... more We studied the planktonic food web in eutrophic Sau Reservoir (Catalonia, NE Spain). Along the longitudinal axis from the Ter River downstream to the dam, we characterized a microbial succession of food web dominance of bacteria-HNF-ciliates. The Ter River transports a large load of organic material into the reservoir, with a bacterial density of ~9 · 10 6 large cells per ml. While at the first lacustrine station of the Reservoir HNF were the dominant bacterial consumers, at the others, an oligotrich ciliate, Halteria grandinella, was the main protozoan bacterivore. Most of the bacterial production in the reservoir epilimnion was consumed by grazing. The spatial succession of the reservoir microbial food webs was followed downstream by maximum densities of their potential predators among zooplankters -rotifers, and early developmental stages of copepods.
Molecular Medicine Today, 1996
Revista De Calidad Asistencial, 2005
396 Rev Calidad Asistencial. 2005;20(7):396-9
Després d’una breu reflexió sobre la importància de les comunitats científiques, aquest article e... more Després d’una breu reflexió sobre la importància de les comunitats científiques, aquest article ens porta als orígens actuals de l’Escola Valenciana de Geografia, mitjançant l’anàlisi del seu mestratge i les característiques comunes que hi té. La metodologia emprada en basa en entrevistes en profunditat al seu iniciador el professor López Gómez i alguns dels seus deixebles més importants com els
Geografia humana és un text universitari però està pensat com a possible lectura per a totes les ... more Geografia humana és un text universitari però està pensat com a possible lectura per a totes les persones que vulguin entendre el món en què viuen. És un llibre que exposa, explica i qüestiona les dificultats creixents del sistema capitalista en un món globalitzat, per garantir una major seguretat, equitat i sostenibilitat, alhora que ens facilita la comprensió i la interpretació dels problemes actuals.
![Research paper thumbnail of A convenient access to 1,3-disubstituted furo[3,4- b]indoles by acid ion-exchange resin-catalyzed furan formation](https://attachments.academia-assets.com/48259191/thumbnails/1.jpg)
](Tetrahedron
Efficient synthesis of furo [3,4-b]indoles starting from the corresponding indole is reported. Th... more Efficient synthesis of furo [3,4-b]indoles starting from the corresponding indole is reported. The first route involves derivatization, protection, and deprotection steps, which stretch the syntheses. The second method provides a shorter and more efficient strategy to accessing the furoindole. The innovation starts with alkylation at C-2 of the indole presenting at the C-3 position a ketone-acetal, followed by the cycloaromatization catalyzed by polymeric ion-exchange resins. The second route represents a significant improvement over other methods previously described.
Journal of Crohn's and Colitis Supplements, 2007
... tant en voga actualment a la Gran Bretanya), però és evident que la limitada extensió d&a... more ... tant en voga actualment a la Gran Bretanya), però és evident que la limitada extensió d'un ... antiterroristes es perfilen real-ment com mètodes eficaços per implementar una societat de vigilància ... Per exemple, Anna Ribas i David Saurí, professors a les Universitats de Girona i de ...
Drying Technology, 1997
The influence of the drying conditions on the enzymatic activity in hazelnut (Corylus avellana, L... more The influence of the drying conditions on the enzymatic activity in hazelnut (Corylus avellana, L.) has been studied. In this work, the activity of the enzymes lipase. peroxidase and polyphenoloxidase have been determined in hazelnuts dried under three temperatures (30, 50 and 70°C). The drying experiments were done with forced air circulation, and samples of Negret variety. unshelled and shelled, were used. It has been observed that the drying process reduces the activity of the enzymes lipase, peroxidase and polyphenoloxidase in hazelnut, and the results indicated that polyphenoloxidase is the most unstable to heat.
Drug and Alcohol Review, 2009
Introduction and Aims. In 2003, a randomised controlled trial comparing injected diacetylmorphine... more Introduction and Aims. In 2003, a randomised controlled trial comparing injected diacetylmorphine and oral methadone was carried out in Andalusia, Spain. The subsequent follow-up study evaluated the health and drug use status of participants, 2 years after the completion of the trial. Design and Methods. This follow-up cohort study was carried out between March and August 2006. Data collected included information on socio-demographics, drug use, health and health-related quality of life. We compared data collected before randomisation and at 2 years for the following three groups: those currently on heroin-assisted treatment (C-HAT), those who have discontinued HAT (D-HAT), and those who have never received HAT (N-HAT). Results. From the total 62 randomised participants in 2003, 54 (87%) were interviewed for this study. Participants were distributed as follow: C-HAT 44.4% (24), N-HAT 22.2% (12) and D-HAT 33.3% (18). Illicit heroin use had a statistically significant decrease in the three groups from baseline to 2 years post trial. Mean days of heroin use were 2.42 (SD = 3.02); 6.56 (SD = 9.48) and 13.92 (SD = 12.59) for the C-HAT, D-HAT and N-HAT groups, respectively. Those currently on HAT were the only group that sustained at 2 years, their marked improvement in health after 9 months of treatment during the trial period. Discussion and Conclusions: Patients who received HAT showed better outcomes compared with those not on HAT. The results of this study strengthen the evidence showing that HAT can improve and stabilise the health of long-term heroin users with severe comorbidities and high mortality.[Oviedo-Joekes E, March JC, Romero M, Perea-Milla E. The Andalusian trial on heroin assisted treatment: A 2 year follow-up. Drug Alcohol Rev 2009]
Journal of Electrostatics, 2009
A numerical study of laser-triggered discharges in air at atmospheric pressure is presented for a... more A numerical study of laser-triggered discharges in air at atmospheric pressure is presented for an ultraviolet laser in small gaps. Two models, one for the ionization of the air by the laser pulse and the second for the streamer evolution have been computed. From results of numerical simulations the influence of the laser parameters such as energy, pulse duration and beam radius is analyzed and electron distributions are obtained for different small gaps. Electric field, streamer velocity and evolution of the ionized volume are calculated by means of streamer simulations. This paper shows the main features of the laser-triggered discharges and also the importance of using numerical simulations in a laser-triggered experiment.
Hepatology, 1987
Since the liver is thought to be the major organ for the metabolism of renin, the rate-limiting e... more Since the liver is thought to be the major organ for the metabolism of renin, the rate-limiting enzyme in the renin-angiotensin cascade, we examined the kinetics and regulation of renin extraction by the isolated perfused rat liver. Partially purified, hog kidney renin was continuously infused into isolated rat livers perfused in a nonrecirculating manner with serum-free medium. Concentrations of renin in the portal and hepatic veins were measured by radioimmunoassay and first-pass hepatic extraction calculated. In livers from normal rats, steady-state, first-pass hepatic extraction of porcine renin ranged from 12.3 ± 0.9 to 25.5 ± 3.9% of the infused dose; at high renin infusion rates, hepatic extraction was saturable. Administration of captopril, a converting enzyme inhibitor, decreased hepatic extraction of renin by approximately 60%; enalaprilat, another converting enzyme inhibitor, had no effect. First-pass hepatic extraction of renin was also inhibited by the bile acid, taurocholate, in a dose-dependent manner. However, bilateral nephrectomy, which reduced endogenous plasma renin activity to unmeasurable levels, had no significant effect on hepatic extraction of renin by livers isolated from nephrectomized rats. These results demonstrate directly that the liver extracts renin in a dose-dependent and saturable manner, although the precise mechanism of uptake remains to be determined.
Drying Technology, 1997
The influence of the drying conditions on the enzymatic activity in hazelnut (Corylus avellana, L... more The influence of the drying conditions on the enzymatic activity in hazelnut (Corylus avellana, L.) has been studied. In this work, the activity of the enzymes lipase. peroxidase and polyphenoloxidase have been determined in hazelnuts dried under three temperatures (30, 50 and 70°C). The drying experiments were done with forced air circulation, and samples of Negret variety. unshelled and shelled, were used. It has been observed that the drying process reduces the activity of the enzymes lipase, peroxidase and polyphenoloxidase in hazelnut, and the results indicated that polyphenoloxidase is the most unstable to heat.
Atencion Primaria, 2009
Recientemente hemos asistido en nuestro centro de salud a una sesión basada en el documento de la... more Recientemente hemos asistido en nuestro centro de salud a una sesión basada en el documento de la semFYC )Manejo de las dislipemias en el paciente diabético y de riesgo coronario*, que forma parte de las )Sesiones clínicas en APS* 1 . En él se plantea un caso clínico de un varón de 63 años, sedentario, actualmente obeso, hipertenso, diabético, fumador y sin antecedentes de enfermedad vascular. Con base en los datos de las exploraciones complementarias, se le atribuye un riesgo cardiovascular alto.
Drying Technology, 1997
The influence of the drying conditions on the enzymatic activity in hazelnut (Corylus avellana, L... more The influence of the drying conditions on the enzymatic activity in hazelnut (Corylus avellana, L.) has been studied. In this work, the activity of the enzymes lipase. peroxidase and polyphenoloxidase have been determined in hazelnuts dried under three temperatures (30, 50 and 70°C). The drying experiments were done with forced air circulation, and samples of Negret variety. unshelled and shelled, were used. It has been observed that the drying process reduces the activity of the enzymes lipase, peroxidase and polyphenoloxidase in hazelnut, and the results indicated that polyphenoloxidase is the most unstable to heat.
International Review of Hydrobiology, 2001
We studied the planktonic food web in eutrophic Sau Reservoir (Catalonia, NE Spain). Along the lo... more We studied the planktonic food web in eutrophic Sau Reservoir (Catalonia, NE Spain). Along the longitudinal axis from the Ter River downstream to the dam, we characterized a microbial succession of food web dominance of bacteria-HNF-ciliates. The Ter River transports a large load of organic material into the reservoir, with a bacterial density of ~9 · 10 6 large cells per ml. While at the first lacustrine station of the Reservoir HNF were the dominant bacterial consumers, at the others, an oligotrich ciliate, Halteria grandinella, was the main protozoan bacterivore. Most of the bacterial production in the reservoir epilimnion was consumed by grazing. The spatial succession of the reservoir microbial food webs was followed downstream by maximum densities of their potential predators among zooplankters -rotifers, and early developmental stages of copepods.
Molecular Medicine Today, 1996
Revista De Calidad Asistencial, 2005
396 Rev Calidad Asistencial. 2005;20(7):396-9
Després d’una breu reflexió sobre la importància de les comunitats científiques, aquest article e... more Després d’una breu reflexió sobre la importància de les comunitats científiques, aquest article ens porta als orígens actuals de l’Escola Valenciana de Geografia, mitjançant l’anàlisi del seu mestratge i les característiques comunes que hi té. La metodologia emprada en basa en entrevistes en profunditat al seu iniciador el professor López Gómez i alguns dels seus deixebles més importants com els
Geografia humana és un text universitari però està pensat com a possible lectura per a totes les ... more Geografia humana és un text universitari però està pensat com a possible lectura per a totes les persones que vulguin entendre el món en què viuen. És un llibre que exposa, explica i qüestiona les dificultats creixents del sistema capitalista en un món globalitzat, per garantir una major seguretat, equitat i sostenibilitat, alhora que ens facilita la comprensió i la interpretació dels problemes actuals.
Tetrahedron
Efficient synthesis of furo [3,4-b]indoles starting from the corresponding indole is reported. Th... more Efficient synthesis of furo [3,4-b]indoles starting from the corresponding indole is reported. The first route involves derivatization, protection, and deprotection steps, which stretch the syntheses. The second method provides a shorter and more efficient strategy to accessing the furoindole. The innovation starts with alkylation at C-2 of the indole presenting at the C-3 position a ketone-acetal, followed by the cycloaromatization catalyzed by polymeric ion-exchange resins. The second route represents a significant improvement over other methods previously described.
Journal of Crohn's and Colitis Supplements, 2007
... tant en voga actualment a la Gran Bretanya), però és evident que la limitada extensió d&a... more ... tant en voga actualment a la Gran Bretanya), però és evident que la limitada extensió d'un ... antiterroristes es perfilen real-ment com mètodes eficaços per implementar una societat de vigilància ... Per exemple, Anna Ribas i David Saurí, professors a les Universitats de Girona i de ...