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Papers by Claudia Cardona

Research paper thumbnail of The reactivity of phenol in irradiated aqueous suspensions of TiO 2. Mechanistic changes as a function of solution pH

Journal of Photochemistry and Photobiology A-chemistry, 1995

The reactivity of phenol under oxic and anoxic conditions in irradiated (350 nm) aqueous suspensi... more The reactivity of phenol under oxic and anoxic conditions in irradiated (350 nm) aqueous suspensions of TiO2 as a function of pH was studied. The initial rate of disappearance of phenol is significantly influenced by solution pH. The initial disappearance rates and Langmuir-Hinshelwood kinetic parameters are comparable over a range from pH 3 to 9 and at pH 13.7, while

Research paper thumbnail of Hammett study on the TiOâ-catalyzed photooxidation of para-substituted phenols. A kinetic and mechanistic analysis

Journal of Organic Chemistry, 1994

The TiOz-catalyzed photooxidation of phenol, p-methoxyphenol, p-cresol, p-fluorophenol, pchloroph... more The TiOz-catalyzed photooxidation of phenol, p-methoxyphenol, p-cresol, p-fluorophenol, pchlorophenol, p-bromophenol, 4-hydroxyacetophenone, a,a,a-trifluoro-p-cresol, p-cyanophenol, and p-iodophenol were investigated. The decay kinetics of the substituted phenols are consistent with the Langmuir-Hinshelwood (L-H) kinetic model. Although a variety of substituents were employed the changes in the L-H kinetic parameters are relatively small. The relationship among Hammett constants and the kinetic parameters suggest that a number reaction pathways may be involved in the degradation.

Research paper thumbnail of Can patients with McArdle's disease run? * Commentary

British Journal of Sports Medicine, 2006

Research paper thumbnail of Effects of an Intrahospital Exercise Program Intervention for Children with Leukemia

Medicine and Science in Sports and Exercise, 2007

Research paper thumbnail of Functional Capacity of Children with Leukemia

International Journal of Sports Medicine, 2008

! Previous research has shown that adult cancer patients and/or survivors commonly exhibit poor p... more ! Previous research has shown that adult cancer patients and/or survivors commonly exhibit poor physical capacity, i.e., peak oxygen uptake (V O 2peak ) levels considerably lower (~50 %) than predicted, which reflects, at least partly, the sedentary life habits of this population group . Less research has focused on the physical capacity (e.g., expressed as V O 2peak ) of children with cancer. This is, however, an important topic given that outdoor physical activities play an important role in the daily routine of children; thus, impaired physical capacity can have a direct detrimental effect on their quality of life (QOL) . Decreased QOL associated to a poor functional capacity has indeed been reported in survivors (i.e., who have successfully completed treatment) of childhood cancer, a fact that is attributable to various mechanisms related to the side effects of treatment as musculoskeletal and neuro-muscular complications, anthracycline-induced cardiotoxicity, sarcopenia and muscle weakness, or reduced ankle range of motion . To the best of our knowledge, however, little research is available on the exercise capacity (i.e., V O 2peak ) of children during treatment against cancer. Thus, it would be interesting to assess if functional capacity is also significantly decreased in this population. If this was indeed the case, exercise training prescription would seem necessary during treatment (not only after successfully completing treatment) to improve the physical condition and QOL of children with cancer. This would aid in preventing poor physical condition from becoming a chronic problem and a self-perpetuating condition in the years that follow the completion of treatment. It was therefore the purpose of this study to determine if the physical fitness (assessed with a number of measurements as V O 2peak , ventilatory threshold, functional mobility and ankle range of Abstract ! The purpose of this study was to determine if the functional capacity and quality of life of children receiving treatment against acute lymphoblastic leukemia (ALL) is decreased compared to healthy age and gender-matched children. Functional capacity was assessed with a number of measurements as the peak oxygen uptake (V O 2peak ) and ventilatory threshold determined during a ramp treadmill test, functional mobility (Timed Up and Down Stairs test [TUDS]) and ankle dorsiflexion passive and active range of motion (passive and active DF-ROM, respectively). Quality of life (QOL) was determined with the Spanish version of the Child Report Form of the Child Health and Illness Profile-Child Edition (CHIP-CE/CRF). Fifteen children (9 boys, 6 girls; mean [SD] age: 6.8 ± 3.1 years) receiving maintenance therapy against ALL were studied and fifteen, nonathletic healthy children (9 boys, 6 girls; 6.9 ± 3.3 years) were selected as controls. The mean values of V O 2peak and active DF-ROM were significantly (p < 0.05) lower in patients (25.3 ± 6.5 ml • kg -1 • min -1 vs. 31.9 ± 6.8 ml • kg -1 • min -1 in controls and 19.6 ± 8.08 vs. 24.1 ± 5.08, respectively). Children's self report of satisfaction (with self and health) (p < 0.05), comfort (concerning emotional and physical symptoms and limitations) (p < 0.01) and resilience (positive activities that promote health) (p < 0.01) were significantly decreased in patients with ALL. In summary, children receiving treatment against ALL have overall lower functional capacity and QOL than healthy children. However, their physical condition and health status are sufficiently high to allow them to participate in physical activities and supervised exercise programs.

Research paper thumbnail of The reactivity of phenol in irradiated aqueous suspensions of TiO 2. Mechanistic changes as a function of solution pH

Journal of Photochemistry and Photobiology A-chemistry, 1995

The reactivity of phenol under oxic and anoxic conditions in irradiated (350 nm) aqueous suspensi... more The reactivity of phenol under oxic and anoxic conditions in irradiated (350 nm) aqueous suspensions of TiO2 as a function of pH was studied. The initial rate of disappearance of phenol is significantly influenced by solution pH. The initial disappearance rates and Langmuir-Hinshelwood kinetic parameters are comparable over a range from pH 3 to 9 and at pH 13.7, while

Research paper thumbnail of Hammett study on the TiOâ-catalyzed photooxidation of para-substituted phenols. A kinetic and mechanistic analysis

Journal of Organic Chemistry, 1994

The TiOz-catalyzed photooxidation of phenol, p-methoxyphenol, p-cresol, p-fluorophenol, pchloroph... more The TiOz-catalyzed photooxidation of phenol, p-methoxyphenol, p-cresol, p-fluorophenol, pchlorophenol, p-bromophenol, 4-hydroxyacetophenone, a,a,a-trifluoro-p-cresol, p-cyanophenol, and p-iodophenol were investigated. The decay kinetics of the substituted phenols are consistent with the Langmuir-Hinshelwood (L-H) kinetic model. Although a variety of substituents were employed the changes in the L-H kinetic parameters are relatively small. The relationship among Hammett constants and the kinetic parameters suggest that a number reaction pathways may be involved in the degradation.

Research paper thumbnail of Can patients with McArdle's disease run? * Commentary

British Journal of Sports Medicine, 2006

Research paper thumbnail of Effects of an Intrahospital Exercise Program Intervention for Children with Leukemia

Medicine and Science in Sports and Exercise, 2007

Research paper thumbnail of Functional Capacity of Children with Leukemia

International Journal of Sports Medicine, 2008

! Previous research has shown that adult cancer patients and/or survivors commonly exhibit poor p... more ! Previous research has shown that adult cancer patients and/or survivors commonly exhibit poor physical capacity, i.e., peak oxygen uptake (V O 2peak ) levels considerably lower (~50 %) than predicted, which reflects, at least partly, the sedentary life habits of this population group . Less research has focused on the physical capacity (e.g., expressed as V O 2peak ) of children with cancer. This is, however, an important topic given that outdoor physical activities play an important role in the daily routine of children; thus, impaired physical capacity can have a direct detrimental effect on their quality of life (QOL) . Decreased QOL associated to a poor functional capacity has indeed been reported in survivors (i.e., who have successfully completed treatment) of childhood cancer, a fact that is attributable to various mechanisms related to the side effects of treatment as musculoskeletal and neuro-muscular complications, anthracycline-induced cardiotoxicity, sarcopenia and muscle weakness, or reduced ankle range of motion . To the best of our knowledge, however, little research is available on the exercise capacity (i.e., V O 2peak ) of children during treatment against cancer. Thus, it would be interesting to assess if functional capacity is also significantly decreased in this population. If this was indeed the case, exercise training prescription would seem necessary during treatment (not only after successfully completing treatment) to improve the physical condition and QOL of children with cancer. This would aid in preventing poor physical condition from becoming a chronic problem and a self-perpetuating condition in the years that follow the completion of treatment. It was therefore the purpose of this study to determine if the physical fitness (assessed with a number of measurements as V O 2peak , ventilatory threshold, functional mobility and ankle range of Abstract ! The purpose of this study was to determine if the functional capacity and quality of life of children receiving treatment against acute lymphoblastic leukemia (ALL) is decreased compared to healthy age and gender-matched children. Functional capacity was assessed with a number of measurements as the peak oxygen uptake (V O 2peak ) and ventilatory threshold determined during a ramp treadmill test, functional mobility (Timed Up and Down Stairs test [TUDS]) and ankle dorsiflexion passive and active range of motion (passive and active DF-ROM, respectively). Quality of life (QOL) was determined with the Spanish version of the Child Report Form of the Child Health and Illness Profile-Child Edition (CHIP-CE/CRF). Fifteen children (9 boys, 6 girls; mean [SD] age: 6.8 ± 3.1 years) receiving maintenance therapy against ALL were studied and fifteen, nonathletic healthy children (9 boys, 6 girls; 6.9 ± 3.3 years) were selected as controls. The mean values of V O 2peak and active DF-ROM were significantly (p < 0.05) lower in patients (25.3 ± 6.5 ml • kg -1 • min -1 vs. 31.9 ± 6.8 ml • kg -1 • min -1 in controls and 19.6 ± 8.08 vs. 24.1 ± 5.08, respectively). Children's self report of satisfaction (with self and health) (p < 0.05), comfort (concerning emotional and physical symptoms and limitations) (p < 0.01) and resilience (positive activities that promote health) (p < 0.01) were significantly decreased in patients with ALL. In summary, children receiving treatment against ALL have overall lower functional capacity and QOL than healthy children. However, their physical condition and health status are sufficiently high to allow them to participate in physical activities and supervised exercise programs.