cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.10026170.v1
title: ROUTINE USE OF V-LOCK® SUTURE FOR BARIATRIC ANASTOMOSIS IS SAFE: COMPARATIVE RESULTS FROM CONSECUTIVE CASE SERIES

description: ABSTRACT Background: In high-income countries, morbid obesity is a growing health problem that has already reached epidemic proportions. When performing a laparoscopic gastric bypass several operative methods exist. Aim: To describe the institutional experience using a knotless unidirectional barbed suture (V-Loc 180/Covidien, Mansfield, MA) to create a hand-sewn gastrojejunostomy (GJ) and jejunojejunostomy (JJ) during bariatric surgery. Methods: Evaluation of a case series of 87 morbidly obese patients who underwent laparoscopic gastric bypass with a hand-sewn gastrojejunostomy (GJA) and jejunojejunostomy (JJA) between 01/2015 and 06/2017. The patients were divided into two groups: in group I, GJA und JJA sutures were performed using the knotless unidirectional barbed suture; in group II, GJA and JJA were sutured with resorbable multifilament thread (Vicryl® 3/0 Ethicon, Livingstone, UK). The recorded data on gender, age, BMI, ASA score, operative time, postoperative morbidity, length of hospital stay, and reoperation, were analyzed and compared. Results: All procedures were completed laparoscopically with no mortality. The mean operative time was 123.23 (±30.631) in group I and 127.57 (±42.772) in group II (p&lt;0.05). The postoperative complications did not differ significantly between the two groups. Early complications were observed for two patients (0.9%) in the barbed suture group and for one patient (0.42%) in the multifilament suture group (p&lt;0.05). In group I two patients (0.9%) required reoperation: on the basis of jejunojejunal stenosis in one patient, and local abscess near the gastrojejunostomy, without a leakage, in the other. In group II one patient (0.42%) required reoperation due to stenosis of the GJA. The duration of hospital admission was similar for both groups: 3.36 (±0.743) days in group I vs. 3.38 (±1.058) days in group II (p&lt;0.05). Conclusion: The novel anastomotic technique is a safe and effective method and can be applied to gastrojejunal anastomosis and jejunojejunal anastomosis in laparoscopic gastric bypass.
DOI: 10.6084/m9.figshare.10026173.v1
title: Electrode Modified with the Ionic Liquid [P6,6,6,14+]2[MnCl42-] for the Determination of Bisphenol A in Plastic Samples

description: This paper describes a new and simple electrode for the determination of bisphenol A (BPA) in different plastic samples using carbon paste electrode (CPE) modified with a trihexyltetradecylphosphonium tetrachloromanganate(II) ([P6,6,6,14+]2[MnCl42-]) magnetic ionic liquid (MIL/CPE). Electrochemical characterization of MIL/CPE by cyclic voltammetry and electrochemical impedance spectroscopy indicated that MIL facilitated the electron transfer. Using squarewave voltammetry (SWV) under optimized conditions, the calibration curve showed a linear range for BPA from 2.0 to 53.0 µmol L-1, with limit of detection (LOD) of 0.87 µmol L-1. The proposed electrode demonstrated good precision with coefficients of variation of 4.5% (intra-day, n = 10), 2.0% (inter-day, n = 5) and 1.5% (electrode-to-electrode repeatability, n = 3). Recoveries of 93.0 to 101.1% demonstrated that the method is suitable for practical applications.
DOI: 10.6084/m9.figshare.10026179.v1
title: Evaluation of BDNF levels in patients hospitalized for physical trauma at an emergency hospital in Porto Alegre, southern Brazil

description: Abstract Objective To assess the association between brain-derived neurotrophic factor (BDNF) levels and acute stress disorder (ASD) in patients who have suffered physical trauma. Methods Data were collected at an emergency hospital in Porto Alegre, state of Rio Grande do Sul, southern Brazil. Participants were over 18 years of age, victims of physical trauma, and had been hospitalized for a minimum of 48 hours. A total of 117 hospitalized patients who agreed to participate in the research were grouped according to the shift in which blood was collected (38 subjects from the morning shift and 79 from the afternoon shift), had their BDNF levels measured and responded to other questionnaires. Respondents were further grouped by age into three ranges: 18-30, 31-50 and 51-70 years. Results We found a significant difference in the distribution of BDNF between the two shifts in which blood samples were collected, with the afternoon group having higher BDNF levels (U = 1906.5, p = 0.018). A difference was observed only between the 18-30 group and the 51-70 group in the afternoon shift (Umorning = 1107, pmorning = 0.575; Uafternoon = 7175, pafternoon = 0.028). Conclusions The population whose blood samples were collected in the afternoon showed significantly higher values of BDNF compared to those of the morning shift. This same population presented lower BDNF levels when associated with ASD subtypes A1, A2, and A. We hypothesize that the lower values of BDNF measured in the morning shift were due to a response to the circadian cycle of cortisol, whose action inhibits the expression of serum neurotrophins.
DOI: 10.6084/m9.figshare.10026164
title: DNA Damage by Endogenous and Exogenous Aldehydes

description: The present overview describes the formation of deoxyribonucleic acid (DNA) adducts from endogenous and exogenous aldehydes, such as acetaldehyde, acrolein, crotonaldehyde, malonaldehyde, 4-hydroxy-2-nonenal and 2,4-decadienal. Malonaldehyde reacts with 2’-deoxyguanosine, 2’-deoxyadenosine, and 2’-deoxycytidine, yielding cyclic pyrimidopurinone and acyclic adducts. The direct addition of ɑ,β-unsaturated aldehydes to DNA bases yields cyclic substituted propano adducts, such as 1,N2-propano-2’-deoxyguanosine. Alternatively, ɑ,β-unsaturated aldehydes can be oxidized to reactive epoxides, giving ethano or etheno derivatives upon reaction with DNA. In addition, information on highly sensitive techniques, employed for the in vivo detection and quantification of DNA-aldehyde adducts, is also provided. Some of these DNA-aldehyde lesions have been shown to be highly mutagenic. In fact, lipid peroxidation and exogenous aldehyde exposure could potentially account for the observed carcinogenicity of urban air pollution and cigarette smoke exposure.
DOI: 10.14272/ntwydsohaseyid-uhfffaoysa-n/chmo0000593
title: 1H nuclear magnetic resonance spectroscopy (1H NMR) (1-[1-[4-[3,5-bis[4-[1-(2,2,6,6-tetramethylpiperidin-1-yl)oxyethyl]phenyl]phenyl]phenyl]ethoxy]-2,2,6,6-tetramethylpiperidine)
title: InChI=1S/C57H81N3O3/c1-40(61-58-52(4,5)31-16-32-53(58,6)7)43-19-25-46(26-20-43)49-37-50(47-27-21-44(22-28-47)41(2)62-59-54(8,9)33-17-34-55(59,10)11)39-51(38-49)48-29-23-45(24-30-48)42(3)63-60-56(12,13)35-18-36-57(60,14)15/h19-30,37-42H,16-18,31-36H2,1-15H3

description: dataset for 1H nuclear magnetic resonance spectroscopy (1H NMR) 1H NMR (400 MHz, CD2Cl2 [5.32 ppm], ppm) δ = 7.82 (s, 3H, CarH), 7.70–7.68 (m, 6H, CarH), 7.46–7.44 (m, 6H, CarH), 4.87 (q, J = 6.6 Hz, 3H, CHO), 1.55–1.32 (m, 36H, CH3 Sidechain, CH2 CH3 TEMPO), 1.19 (bs, 9H, CH3 TEMPO), 1.07 (bs, 9H, CH3 TEMPO), 0.75 (bs, 9H, CH3 TEMPO).
DOI: 10.14272/ntwydsohaseyid-uhfffaoysa-n/chmo0000595
title: 13C nuclear magnetic resonance spectroscopy (13C NMR) (1-[1-[4-[3,5-bis[4-[1-(2,2,6,6-tetramethylpiperidin-1-yl)oxyethyl]phenyl]phenyl]phenyl]ethoxy]-2,2,6,6-tetramethylpiperidine)
title: InChI=1S/C57H81N3O3/c1-40(61-58-52(4,5)31-16-32-53(58,6)7)43-19-25-46(26-20-43)49-37-50(47-27-21-44(22-28-47)41(2)62-59-54(8,9)33-17-34-55(59,10)11)39-51(38-49)48-29-23-45(24-30-48)42(3)63-60-56(12,13)35-18-36-57(60,14)15/h19-30,37-42H,16-18,31-36H2,1-15H3

description: dataset for 13C nuclear magnetic resonance spectroscopy (13C NMR) 13C NMR (100 MHz, CD2Cl2 [54.0 ppm], ppm) δ = 145.8 (3C, Cq), 142.6 (3C, Cq), 140.1 (3C, Cq), 127.7 (6C, CarH), 127.4 (6C, Car.H), 125.2 (3C, CarH), 83.3 (3C, CHO), 60.2 (6C, Cq TEMPO), 41.0 (6C, CH2 TEMPO), 34.9 (3C, CH3 TEMPO), 34.7 (3C, CH3 TEMPO), 23.8 (3C, CH3), 20.7 (6C, CH3 TEMPO), 17.8 (3C, CH2 TEMPO).
DOI: 10.14272/ntwydsohaseyid-uhfffaoysa-n.1
title: 1-[1-[4-[3,5-bis[4-[1-(2,2,6,6-tetramethylpiperidin-1-yl)oxyethyl]phenyl]phenyl]phenyl]ethoxy]-2,2,6,6-tetramethylpiperidine
title: InChI=1S/C57H81N3O3/c1-40(61-58-52(4,5)31-16-32-53(58,6)7)43-19-25-46(26-20-43)49-37-50(47-27-21-44(22-28-47)41(2)62-59-54(8,9)33-17-34-55(59,10)11)39-51(38-49)48-29-23-45(24-30-48)42(3)63-60-56(12,13)35-18-36-57(60,14)15/h19-30,37-42H,16-18,31-36H2,1-15H3

description: This dataset contains experimental data from a sample (1-[1-[4-[3,5-bis[4-[1-(2,2,6,6-tetramethylpiperidin-1-yl)oxyethyl]phenyl]phenyl]phenyl]ethoxy]-2,2,6,6-tetramethylpiperidine, InChI=1S/C57H81N3O3/c1-40(61-58-52(4,5)31-16-32-53(58,6)7)43-19-25-46(26-20-43)49-37-50(47-27-21-44(22-28-47)41(2)62-59-54(8,9)33-17-34-55(59,10)11)39-51(38-49)48-29-23-45(24-30-48)42(3)63-60-56(12,13)35-18-36-57(60,14)15/h19-30,37-42H,16-18,31-36H2,1-15H3). The datasets from the following experiments are available: 1H nuclear magnetic resonance spectroscopy (1H NMR) 13C nuclear magnetic resonance spectroscopy (13C NMR) mass spectrometry (MS) infrared absorption spectroscopy (IR)
DOI: 10.6084/m9.figshare.10026161
title: PEDAGOGICAL PRACTICES FOR CHEMISTRY LECTURERS: THE IMPORTANCE OF THE CHEMICAL TRIPLET, VERBAL LANGUAGE AND INVESTIGATIVE EXPERIMENTS IN CHEMISTRY TEACHER EDUCATION

description: This theoretical paper proposes some pedagogical practices that may be applicable by chemical lecturers who teach in Chemistry teacher education courses. Those practices are based on three theoretical ideas: i) Johnstone’s triplet about the three levels of chemical knowledge (macroscopic, microscopic and symbolic) which imposes challenges due to the significance of chemical language, leading us to discuss ii) the importance of the verbal language in chemistry teaching-learning processes, and iii) in the role of investigative experiments for exploring students’ ideas and promote abstract thought. Those practices focuses on the relation of the chemical triplet with investigative experiments for promoting meanings’ negotiations between lecturer and his students by means of pedagogical mediations and discursive interactions. In this sense, some research contributions about chemical education are related with central ideas of the historical-cultural approach proposed by Vigotski and collaborators aiming to highlight the importance of chemical lecturers in chemistry teacher education courses.
DOI: 10.6084/m9.figshare.10026161.v1
title: PEDAGOGICAL PRACTICES FOR CHEMISTRY LECTURERS: THE IMPORTANCE OF THE CHEMICAL TRIPLET, VERBAL LANGUAGE AND INVESTIGATIVE EXPERIMENTS IN CHEMISTRY TEACHER EDUCATION

description: This theoretical paper proposes some pedagogical practices that may be applicable by chemical lecturers who teach in Chemistry teacher education courses. Those practices are based on three theoretical ideas: i) Johnstone’s triplet about the three levels of chemical knowledge (macroscopic, microscopic and symbolic) which imposes challenges due to the significance of chemical language, leading us to discuss ii) the importance of the verbal language in chemistry teaching-learning processes, and iii) in the role of investigative experiments for exploring students’ ideas and promote abstract thought. Those practices focuses on the relation of the chemical triplet with investigative experiments for promoting meanings’ negotiations between lecturer and his students by means of pedagogical mediations and discursive interactions. In this sense, some research contributions about chemical education are related with central ideas of the historical-cultural approach proposed by Vigotski and collaborators aiming to highlight the importance of chemical lecturers in chemistry teacher education courses.
DOI: 10.14272/ntwydsohaseyid-uhfffaoysa-n/chmo0000630
title: infrared absorption spectroscopy (IR) (1-[1-[4-[3,5-bis[4-[1-(2,2,6,6-tetramethylpiperidin-1-yl)oxyethyl]phenyl]phenyl]phenyl]ethoxy]-2,2,6,6-tetramethylpiperidine)
title: InChI=1S/C57H81N3O3/c1-40(61-58-52(4,5)31-16-32-53(58,6)7)43-19-25-46(26-20-43)49-37-50(47-27-21-44(22-28-47)41(2)62-59-54(8,9)33-17-34-55(59,10)11)39-51(38-49)48-29-23-45(24-30-48)42(3)63-60-56(12,13)35-18-36-57(60,14)15/h19-30,37-42H,16-18,31-36H2,1-15H3

description: dataset for infrared absorption spectroscopy (IR) IR (ATR, ṽ) = 2970 (m), 2927 (s), 2868 (w), 2846 (w), 1595 (w), 1567 (vw), 1511 (w), 1451 (w), 1394 (w), 1374 (m), 1360 (m), 1350 (w), 1336 (w), 1296 (w), 1258 (w), 1242 (w), 1208 (w), 1181 (w), 1132 (m), 1094 (w), 1061 (s), 1045 (w), 1017 (w), 989 (w), 975 (w), 956 (w), 933 (s), 882 (w), 826 (vs), 795 (w), 762 (w), 739 (w), 705 (w), 613 (w), 579 (w), 554 (w), 507 (w), 419 (w), 398 (w) cm–1.
DOI: 10.6084/m9.figshare.10026146
title: Biomass association in specimens and interspecific hybrids of tomatoes

description: ABSTRACT. The objective of this study is to analyze the growth of wild species of tomato, of the cultivar Redenção and of the respective F1 hybrids of interspecific crossings. We evaluated six wild-type accessions (Solanum pimpinellifolium ‘AF 26970’, S. galapagense ‘LA-1401’, S. peruvianum ‘AF 19684’, S. habrochaites var. hirsutum ‘PI-127826’, S. habrochaites var. glabratum ‘PI-134417’, and S. pennellii ‘LA-716’) and the commercial cultivar Redenção (S. lycopersicum) together with their respective interspecific hybrids. In completely randomized blocks and plots subdivided by time (16, 28, 42, 56, 70, and 84 days after transplanting), we evaluated leaf area (LA), total dry matter (TDM), absolute growth rate (AGR), relative growth rate (RGR) and net assimilation rate (NAR). The distribution of assimilates in the different organs followed different patterns according to genotype. There was a greater accumulation of LA and TDM in the accessions ‘PI-127826’ and ‘PI-134417’ and in the hybrids ‘Redenção’ x ‘PI-127826’ and ‘Redenção’ x ‘PI-134417’. Due to a heterotrophic effect provided by the crossings, there were higher LA, TDM, AGR, RGR and NAR in hybrids than in parent plants. The accessions ‘PI-127826’ and ‘PI-134417’ presented a potential to be donor parents for obtaining tomatoes with a greater capacity of net assimilation and biomass accumulation.
DOI: 10.14272/ntwydsohaseyid-uhfffaoysa-n/chmo0000470
title: mass spectrometry (MS) (1-[1-[4-[3,5-bis[4-[1-(2,2,6,6-tetramethylpiperidin-1-yl)oxyethyl]phenyl]phenyl]phenyl]ethoxy]-2,2,6,6-tetramethylpiperidine)
title: InChI=1S/C57H81N3O3/c1-40(61-58-52(4,5)31-16-32-53(58,6)7)43-19-25-46(26-20-43)49-37-50(47-27-21-44(22-28-47)41(2)62-59-54(8,9)33-17-34-55(59,10)11)39-51(38-49)48-29-23-45(24-30-48)42(3)63-60-56(12,13)35-18-36-57(60,14)15/h19-30,37-42H,16-18,31-36H2,1-15H3

description: dataset for mass spectrometry (MS) FAB (3-NBA, m/z): 857 [M+ + H], 700 [M+ – TEMPO], 543 [M+ – 2 TEMPO], 402, 387 [M+ – 3 TEMPO], 158, 156 [TEMPO+], 140 [TEMPO+ – O]. HRMS–FAB (m/z): [M + H]+ calcd for C57H82N3O3, 856.6351; found, 856.6348.
DOI: 10.6084/m9.figshare.10026137
title: BIORREMEDIATION OF INDUSTRIAL EFFLUENT USING MICROALGAE

description: National industrial effluent remediation strategies are largely outdated, which makes these processes costly and at the same time inefficient. Among the most worrying compounds are heavy metals, which have bioaccumulative and toxic characteristics to living beings. In addition to these, high nutrient loads constitute a huge environmental problem, since the devastation promoted by eutrophic niches is capable of disrupting complex food chains. This paper presents a bibliographical review of the current researches that are applying biomass from microalgae in effluent bioremediation, both domestic and industrial (mainly the latter, since its pollution potential is abruptly greater). Such strategy is interesting since the diversity of these microorganisms is abundant, propitiating the application of them in various conditions. Another point to be taken into consideration is the fact that many species of microalgae produce large amounts of lipids, many of which have potential application in the production of biodiesel.
DOI: 10.6084/m9.figshare.10026140
title: Degradation of Acid Red 8 Dye Using Photo-Fenton Reaction Mediated by Titanium Modified Catalysts

description: Catalysts prepared by co-precipitation of iron and titanium were evaluated in heterogeneous photo-Fenton degradation of the azo dye Acid Red 8 under blacklight irradiation. Materials with different titanium contents (0 &lt; Ti/Fe &lt; 0.6) were characterized using X-ray diffractometry, scanning electron microscopy, X-ray fluorescence spectroscopy, specific surface area and X-ray photoelectron spectroscopy. Hematite was identified as main phase in materials with lowest Ti content, while titanomaghemite was predominant at high Ti content. Highest degradation was obtained using titanium free catalyst due to iron leaching, which promoted a homogeneous reaction. Addition of Ti led to a heterogeneous process with a maximum when Ti/Fe = 0.40 achieving 0.76 mol of dye mineralized per mol of soluble iron after 90 min, using 10 mmol L-1 H2O2 at pH 5.6, value at least three times higher than that observed for catalysts with lower Ti content. The results indicate that Ti stabilizes the catalyst and increases its heterogeneous activity in photo-Fenton process.
DOI: 10.6084/m9.figshare.10026143
title: Neural receptors and Alzheimer’s disease: a systematic review of the literature on receptor families most associated with the disease, their functions and expression areas

description: ABSTRACT Objective The article aims to find the receptors family involved with Alzheimer’s disease most studied as well as the tissue that most receptors are expressed. This study also aims to determine the functions predominantly associated with the pathology. In addition, the work seeks to show the models and techniques most used, as well as summarize the findings and discuss the impact of these studies on scientific knowledge. Methods This review addressed a systematic methodology (Prospero; ID 141957). Results It can be seen that nuclear transcription receptors were the most studied. Most of these receptors are expressed in the cerebral cortex and hippocampus. Additionally, a great number of studies evaluated the receptors related to beneficial effects in the disease. The depletion of amyloid protein or the blockade of pathways related to its synthesis were the main functions performed by these receptors. Finally, immunohistochemistry and RT-PCR techniques, respectively, were the most used and the rodents were the main study model. Conclusions Nuclear transcription receptors, cerebral cortex and hippocampus, microglia, and amyloid beta protein have shown significant importance in the pathogenesis of Alzheimer’s disease in this study.
DOI: 10.6084/m9.figshare.10026143.v1
title: Neural receptors and Alzheimer’s disease: a systematic review of the literature on receptor families most associated with the disease, their functions and expression areas

description: ABSTRACT Objective The article aims to find the receptors family involved with Alzheimer’s disease most studied as well as the tissue that most receptors are expressed. This study also aims to determine the functions predominantly associated with the pathology. In addition, the work seeks to show the models and techniques most used, as well as summarize the findings and discuss the impact of these studies on scientific knowledge. Methods This review addressed a systematic methodology (Prospero; ID 141957). Results It can be seen that nuclear transcription receptors were the most studied. Most of these receptors are expressed in the cerebral cortex and hippocampus. Additionally, a great number of studies evaluated the receptors related to beneficial effects in the disease. The depletion of amyloid protein or the blockade of pathways related to its synthesis were the main functions performed by these receptors. Finally, immunohistochemistry and RT-PCR techniques, respectively, were the most used and the rodents were the main study model. Conclusions Nuclear transcription receptors, cerebral cortex and hippocampus, microglia, and amyloid beta protein have shown significant importance in the pathogenesis of Alzheimer’s disease in this study.
DOI: 10.6084/m9.figshare.10026146.v1
title: Biomass association in specimens and interspecific hybrids of tomatoes

description: ABSTRACT. The objective of this study is to analyze the growth of wild species of tomato, of the cultivar Redenção and of the respective F1 hybrids of interspecific crossings. We evaluated six wild-type accessions (Solanum pimpinellifolium ‘AF 26970’, S. galapagense ‘LA-1401’, S. peruvianum ‘AF 19684’, S. habrochaites var. hirsutum ‘PI-127826’, S. habrochaites var. glabratum ‘PI-134417’, and S. pennellii ‘LA-716’) and the commercial cultivar Redenção (S. lycopersicum) together with their respective interspecific hybrids. In completely randomized blocks and plots subdivided by time (16, 28, 42, 56, 70, and 84 days after transplanting), we evaluated leaf area (LA), total dry matter (TDM), absolute growth rate (AGR), relative growth rate (RGR) and net assimilation rate (NAR). The distribution of assimilates in the different organs followed different patterns according to genotype. There was a greater accumulation of LA and TDM in the accessions ‘PI-127826’ and ‘PI-134417’ and in the hybrids ‘Redenção’ x ‘PI-127826’ and ‘Redenção’ x ‘PI-134417’. Due to a heterotrophic effect provided by the crossings, there were higher LA, TDM, AGR, RGR and NAR in hybrids than in parent plants. The accessions ‘PI-127826’ and ‘PI-134417’ presented a potential to be donor parents for obtaining tomatoes with a greater capacity of net assimilation and biomass accumulation.
DOI: 10.6084/m9.figshare.10026137.v1
title: BIORREMEDIATION OF INDUSTRIAL EFFLUENT USING MICROALGAE

description: National industrial effluent remediation strategies are largely outdated, which makes these processes costly and at the same time inefficient. Among the most worrying compounds are heavy metals, which have bioaccumulative and toxic characteristics to living beings. In addition to these, high nutrient loads constitute a huge environmental problem, since the devastation promoted by eutrophic niches is capable of disrupting complex food chains. This paper presents a bibliographical review of the current researches that are applying biomass from microalgae in effluent bioremediation, both domestic and industrial (mainly the latter, since its pollution potential is abruptly greater). Such strategy is interesting since the diversity of these microorganisms is abundant, propitiating the application of them in various conditions. Another point to be taken into consideration is the fact that many species of microalgae produce large amounts of lipids, many of which have potential application in the production of biodiesel.
DOI: 10.6084/m9.figshare.10026140.v1
title: Degradation of Acid Red 8 Dye Using Photo-Fenton Reaction Mediated by Titanium Modified Catalysts

description: Catalysts prepared by co-precipitation of iron and titanium were evaluated in heterogeneous photo-Fenton degradation of the azo dye Acid Red 8 under blacklight irradiation. Materials with different titanium contents (0 &lt; Ti/Fe &lt; 0.6) were characterized using X-ray diffractometry, scanning electron microscopy, X-ray fluorescence spectroscopy, specific surface area and X-ray photoelectron spectroscopy. Hematite was identified as main phase in materials with lowest Ti content, while titanomaghemite was predominant at high Ti content. Highest degradation was obtained using titanium free catalyst due to iron leaching, which promoted a homogeneous reaction. Addition of Ti led to a heterogeneous process with a maximum when Ti/Fe = 0.40 achieving 0.76 mol of dye mineralized per mol of soluble iron after 90 min, using 10 mmol L-1 H2O2 at pH 5.6, value at least three times higher than that observed for catalysts with lower Ti content. The results indicate that Ti stabilizes the catalyst and increases its heterogeneous activity in photo-Fenton process.