Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 12 de 12
Filtrar
Mais filtros

Bases de dados
País/Região como assunto
Tipo de documento
Intervalo de ano de publicação
1.
Pharmacoecon Open ; 8(2): 171-190, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38198111

RESUMO

BACKGROUND: In this ever-expanding treatment landscape, there is a lack of consolidated health-related quality of life (HRQOL) outcomes and utility reports in relapsed or refractory (R/R) large B cell lymphoma (LBCL) to inform health care policy and decision-maker assessments for both old and new products. These assessments can have a direct effect on what treatment options are available to patients and physicians. OBJECTIVE: A systematic literature review (SLR) was performed to understand the HRQOL evidence for treatments in R/R LBCL and identify associated health utility values. METHODS: The SLR searched and screened literature published from 1 January 2003 to 2 May 2022. Studies were screened based on Population, Intervention, Comparator, Outcome, Study design criteria established a priori and were assessed by two independent reviewers; quality assessments of the evidence were performed in accordance with health technology assessment recommendations from the National Institute for Health and Care Excellence. Several types of therapies were included, such as chimeric antigen receptor (CAR) T cell products (lisocabtagene maraleucel, axicabtagene ciloleucel, tisagenlecleucel), novel therapies (selinexor, nivolumab, polatuzumab vedotin, and bendamustine), salvage therapies, and rituximab. RESULTS: The review identified 33 unique studies reporting HRQOL, including 15 economic studies that reported health state utility values, 9 clinical trials, 7 health technology assessment reports, and 1 each of a vignette-based study and a point-in-time survey. Improvements in general and/or lymphoma-specific HRQOL measures were observed with CAR T cell therapy in both the second-line and third-line or later settings. On-treatment utility values for CAR T cell therapies ranged from 0.50 to 0.74. Values for remission/progression-free survival (0.70-0.90) and for disease progression (0.39-0.59) were similar across studies. For novel therapies, utility values were 0.83 for progression-free survival and ranged from 0.39 to 0.71 for disease progression. On-treatment utility values for salvage chemotherapy ranged from 0.63 to 0.67. CONCLUSIONS: Overall, the evidence synthesized in this SLR provides a comprehensive understanding of the HRQOL evidence in R/R LBCL. This article identified several sources for utility values in the published literature showing variation in the HRQOL outcomes for patients across a variety of therapeutics. Treatment of R/R LBCL with CAR T cell therapies was associated with improvement in health utility values. Mixed results were found for novel therapies and salvage therapies. More data are needed as new therapies are used in this patient population to inform treatment decision-making.

2.
Adv Radiat Oncol ; 8(5): 101210, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37152892

RESUMO

Purpose: Advancing equity, diversity, and inclusion in the physician workforce is essential to providing high-quality and culturally responsive patient care and has been shown to improve patient outcomes. To better characterize equity in the field of radiation oncology, we sought to describe the current academic radiation oncology workforce, including any contemporary differences in compensation and rank by gender and race/ethnicity. Methods and Materials: We conducted a retrospective cohort study using data from the Society of Chairs of Academic Radiation Oncology Programs (SCAROP) 2018 Financial Survey. Multivariable logistic regression models were used to identify factors associated with associate or full professor rank. Compensation was compared by gender and race/ethnicity overall and stratified by rank and was further analyzed using multivariable linear regression models. Results: Of the 858 academic radiation oncologists from 63 departments in the United States in the sample, 33.2% were female, 65.2% were White, 27.2% were Asian, and 7.6% were underrepresented in medicine (URiM). There were 44.0% assistant professors, 32.0% associate professors, and 22.8% full professors. Multivariable logistic regression analysis for factors associated with associate or full professor rank did not reveal statistically significant associations between gender or race/ethnicity with academic rank (odds ratio [OR], 0.86; 95% confidence interval [CI], 0.56-1.32; P = .48 for gender; OR, 0.81; 95% CI, 0.5-1.30; P = .37 for Asian vs White; and OR, 0.69; 95% CI, 0.31-1.55; P = .37 for URiM vs White), but CIs were wide due to sample size, and point estimates were <1. Similarly, multivariable linear regression analysis modeling the log relative total compensation did not detect statistically significant differences between radiation oncologists by gender (-1.7%; 95% CI, -6.8% to 3.4%; P = .51 for female vs male) or race/ethnicity (-1.6%; 95% CI, -7.3% to 4.0%; P = .57 for Asian vs White and -3.0%; 95% CI, -12.1% to 6.0%; P = .51 for URiM vs White). Conclusions: The low numbers of women and faculty with URiM race/ethnicity in this radiation oncology faculty sample limits the ability to compare career trajectory and compensation by those characteristics. Given that point estimates were <1, our findings do not contradict larger multispecialty studies that suggest an ongoing need to monitor equity.

3.
Adv Ther ; 40(5): 2355-2374, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-36947328

RESUMO

INTRODUCTION: The objective of this study was to evaluate the cost-effectiveness of lisocabtagene maraleucel (liso-cel) versus other available chimeric antigen receptor T-cell therapies, including axicabtagene ciloleucel (axi-cel) and tisagenlecleucel (tisa-cel), in patients who had received at least two prior therapies from a United States (US) commercial third-party payer perspective. METHODS: To capture this heterogeneity in survival outcomes, we used mixture cure models to extrapolate progression-free survival (PFS) and overall survival (OS). Patient-level data from TRANSCEND NHL 001 for liso-cel and reconstructed patient-level data from ZUMA-1 for axi-cel, JULIET for tisa-cel, and SCHOLAR-1 for salvage chemotherapy, derived using the Guyot method, were used for OS and PFS. The model included adverse events associated with liso-cel, axi-cel, and tisa-cel. RESULTS: Liso-cel was less costly (incremental cost of - $74,980) and marginally more effective (0.002 incremental quality-adjusted life-years [QALY]) than axi-cel and had an incremental cost of $67,925 and 2.02 incremental QALYs over tisa-cel in the base case. Results remained consistent in sensitivity analyses, with the liso-cel OS cure fraction being the main driver of cost-effectiveness compared with both axi-cel and tisa-cel. CONCLUSION: This analysis estimated that liso-cel is cost-effective compared with tisa-cel and axi-cel from a commercial US payer perspective.


Assuntos
Linfoma Difuso de Grandes Células B , Humanos , Análise Custo-Benefício , Imunoterapia Adotiva
4.
J Cancer Educ ; 36(6): 1295-1305, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-32683629

RESUMO

The University of Toronto - Department of Radiation Oncology (UTDRO) has had a well-established Fellowship Program for over 20 years. An assessment of its graduates was conducted to evaluate training experience and perceived impact on professional development. Graduates of the UTDRO Fellowship Program between 1991 and 2015 were the focus of our review. Current employment status was collected using online tools. A study-specific web-based questionnaire was distributed to 263/293 graduates for whom active e-mails were identified; questions focused on training experience, and impact on career progression and academic productivity. As a surrogate measure for the impact of UTDRO Fellowship training, a comparison of current employment and scholarly activities of individuals who obtained their Fellow of the Royal College of Physicians of Canada (FRCPC) designation in Radiation Oncology between 2000 and 2012, with (n = 57) or without (n = 230) UTDRO Fellowship training, was conducted. Almost all UTDRO Fellowship graduates were employed as staff radiation oncologists (291/293), and most of those employed were associated with additional academic (130/293), research (53/293), or leadership (68/293) appointments. Thirty-eight percent (101/263) of alumni responded to the online survey. The top two reasons for completing the Fellowship were to gain specific clinical expertise and exposure to research opportunities. Respondents were very satisfied with their training experience, and the vast majority (99%) would recommend the program to others. Most (96%) felt that completing the Fellowship was beneficial to their career development. University of Toronto, Department of Radiation Oncology Fellowship alumni were more likely to hold university, research, and leadership appointments, and author significantly more publications than those with FRCPC designation without fellowship training from UTDRO. The UTDRO Fellowship Program has been successful since its inception, with the majority of graduates reporting positive training experiences, benefits to scholarly output, and professional development for their post-fellowship careers. Key features that would optimize the fellowship experience and its long-term impact on trainees were also identified.


Assuntos
Internato e Residência , Radioterapia (Especialidade) , Escolha da Profissão , Bolsas de Estudo , Humanos , Liderança , Radio-Oncologistas , Inquéritos e Questionários
5.
Eur J Clin Invest ; 51(3): e13409, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32916764

RESUMO

BACKGROUND: Accurate classification of coronary artery abnormalities (CAAs) is essential for clinical decision-making and long-term management in Kawasaki disease (KD) patients. To date, there are several echocardiographic criteria of CAA assessment. MATERIALS AND METHODS: The Japanese Ministry of Health (JMH) criteria and the Z-score criteria from 2004 American Heart Association guidelines were adopted and their detective efficacies for CAAs were compared in 251 Chinese patients with KD Z scores were calculated by 6 published methods. RESULTS: According to the JMH criteria, 19 (7.57%) KD patients were classified as CAAs during the acute KD episode. However, the detective number of CAAs was highest and had a 0.68-fold increase by the Dallaire et al method with a Z-score cut point of ≥2.5 as compared with the JMH criteria; in contrast, more than 78.95% of patients with CAAs identified by the JMH criteria had a coronary artery Z score ≥2.5. All 6 different Z-score methods had satisfactory accuracies with a range from 93.23% to 97.61% in screening CAAs. For the 19 patients with CAAs identified by the JMH criteria, their Z scores presented the widest variation calculated by the McCrindle et al method. CONCLUSIONS: The JMH criteria underestimate the prevalence of CAAs as compared with the Z-score criteria. Quantitative assessment of coronary artery luminal dimensions, normalized as Z scores adjusted for body surface, should be recommended. The larger coronary artery luminal dimensions vary, the more heterogeneous Z scores calculated by different methods have.


Assuntos
Doença da Artéria Coronariana/diagnóstico por imagem , Síndrome de Linfonodos Mucocutâneos/diagnóstico por imagem , Pré-Escolar , China , Doença da Artéria Coronariana/diagnóstico , Ecocardiografia , Feminino , Humanos , Imunoglobulinas Intravenosas/uso terapêutico , Fatores Imunológicos/uso terapêutico , Lactente , Masculino , Síndrome de Linfonodos Mucocutâneos/diagnóstico , Síndrome de Linfonodos Mucocutâneos/tratamento farmacológico , Guias de Prática Clínica como Assunto , Estudos Retrospectivos
6.
J Cutan Med Surg ; 24(6): 573-587, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32597685

RESUMO

BACKGROUND: In Québec, targeted biologic therapies for moderate to severe plaque psoriasis are restricted to patients who have not responded to phototherapy or conventional systemic treatment, primarily due to high drug costs. Apremilast, an oral treatment for plaque psoriasis, was added to the Québec provincial health insurance plan (Régie de l'assurance maladie du Québec; RAMQ) formulary in 2015, making this the only province in Canada with public drug plan reimbursement for apremilast. OBJECTIVES: The aim of this study is to describe patients' characteristics, treatment patterns, healthcare resource utilization (HCRU), and associated costs and to measure real-world budget impact of using apremilast before biologics in plaque psoriasis. METHODS: This study was performed using RAMQ drug claims and medical services data. Patients diagnosed with psoriasis between January 2015 and December 2017 were identified. Medical services and prescription claims were categorized as all-cause and psoriasis-related. Using RAMQ database estimates, a 3-year budget impact analysis was developed comparing treatment cost with and without the addition of apremilast to the formulary. RESULTS: In all, 540 patients were identified (apremilast: n = 92; biologics: n = 448). Comorbidity burden and treatment persistence and adherence were comparable between apremilast and biologic users. The year following the index date, all-cause HCRU was lower for apremilast versus biologic users (CAN$19 763 vs CAN$28 025; P < .01), mainly driven by drug cost. Using apremilast before biologics resulted in an estimated RAMQ net savings of CAN$49 290 (2015), CAN$746 856 (2016), and CAN$1 216 512 (2017), and a total savings of CAN$2 012 658 since apremilast's addition to the formulary. CONCLUSION: Adding apremilast to the drug formulary of other Canadian provinces could result in significant healthcare savings.


Assuntos
Anti-Inflamatórios não Esteroides/uso terapêutico , Psoríase/tratamento farmacológico , Talidomida/análogos & derivados , Adulto , Idoso , Anti-Inflamatórios não Esteroides/economia , Uso de Medicamentos/economia , Uso de Medicamentos/estatística & dados numéricos , Feminino , Humanos , Revisão da Utilização de Seguros , Masculino , Pessoa de Meia-Idade , Aceitação pelo Paciente de Cuidados de Saúde/estatística & dados numéricos , Psoríase/economia , Psoríase/epidemiologia , Quebeque/epidemiologia , Estudos Retrospectivos , Talidomida/economia , Talidomida/uso terapêutico , Adulto Jovem
7.
J Cancer Res Clin Oncol ; 145(5): 1133-1146, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-30805774

RESUMO

PURPOSE: Human mesenchymal stem cells (hMSCs) have been applied in a variety of therapies recently. However, the role of MSCs in tumor progression remains largely elusive. Some studies demonstrated that MSCs can promote tumor growth, while others had opposite results. Therefore, the lack of evidence about the effect of MSCs on tumor cells impedes its further use. METHODS: In the current study, hMSCs from amniotic membrane (hAMSCs) and umbilical cord (hUCMSCs) were used to evaluate the effects of MSCs on tumor development in vitro and in vivo. Two different animal models based on subcutaneous xenograft bearing nude mice and a murine experimental metastatic model were established for in vivo study. Moreover, cytokines regulated by MSCs co-cultured with cancer cells SPC-A-1 were also analyzed by cytokine array. RESULTS: Our results indicated that hUCMSCs not only did not promote proliferation in cancer cells, but also inhibited migration. In addition, they inhibited tube formation in human umbilical vein endothelial cells (HUVECs). Although hAMSCs also showed inhibitory effects on cancer cell motility, the proliferation of cancer cells was indeed enhanced. The in vivo data revealed that hUCMSCs did not promote tumor progression in lung adenocarcinoma and gastric carcinoma xenografts. Nevertheless, hAMSCs could do. The results from murine experimental metastatic model also demonstrated that neither hUCMSCs nor hAMSCs significantly enhanced the lung metastasis. The data from cytokine array showed that 11 inflammatory factors, 8 growth factors and 11 chemokines were remarkably secreted and changed. CONCLUSIONS: In view of the data from in vitro and in vivo studies, the exploitation of hUCMSCs in new therapeutic strategies should be safe compared to hAMSCs under malignant conditions. Moreover, this is the first report to systematically elucidate the possible molecular mechanisms involved in UCMSC- and AMSC-affected tumor growth and metastasis.


Assuntos
Âmnio/citologia , Comunicação Celular , Transformação Celular Neoplásica/metabolismo , Células-Tronco Mesenquimais/metabolismo , Cordão Umbilical/citologia , Animais , Biomarcadores , Diferenciação Celular , Linhagem Celular Tumoral , Movimento Celular , Proliferação de Células , Técnicas de Cocultura , Meios de Cultivo Condicionados , Citocinas/metabolismo , Modelos Animais de Doenças , Xenoenxertos , Células Endoteliais da Veia Umbilical Humana , Humanos , Imunofenotipagem , Células-Tronco Mesenquimais/citologia , Camundongos , Metástase Neoplásica
8.
Int J Radiat Oncol Biol Phys ; 104(5): 979-986, 2019 08 01.
Artigo em Inglês | MEDLINE | ID: mdl-30684662

RESUMO

PURPOSE: Understanding the pathways and gateways to leadership and challenges faced by individuals in such roles can inform efforts to promote diversity and equity. We sought to describe the professional experiences and personal characteristics of academic radiation oncology (RO) chairs and to evaluate whether differences exist by gender. METHODS AND MATERIALS: Anonymous surveys were distributed to 95 chairs of RO departments during the 2016 annual meeting of the Society of Chairs of Academic Radiation Oncology Programs. The surveys included 28 closed-ended questions and the Leadership Practices Inventory. Results were analyzed by gender using χ2 tests, rank-sum, and t tests (significance P < .05). RESULTS: A total of 72 chairs responded (61 male, 10 female, 1 declined to identify gender) for a response rate of 76%. There were no significant gender differences in age, academic rank, publications, or prior leadership positions held at the time of the first chair appointment, but female respondents held significantly greater total direct funding from extramural grants than their male counterparts (median, $1.89 million [interquartile range, $0.5-$5 million] vs $0.25 million [interquartile range, $0-$1.0 million]; P = .006). Women were more likely to have spouses employed outside the home at time of their first chair appointment than men were, with a trend toward women experiencing greater difficulty relocating. Men and women identified budgeting and resource allocation as their greatest professional challenges. There were no gender differences in the Leadership Practices Inventory-identified leadership domains or professional goals. CONCLUSIONS: Female RO chairs are as equally qualified as men in terms of productivity or leadership skills, but they face distinct challenges in the context of a gender-structured society. The observation of higher grant funding among women at the time of chair appointment suggests a possible need for interventions such as unconscious bias training to ensure that selection processes do not unnecessarily hold women to a higher standard.


Assuntos
Centros Médicos Acadêmicos/normas , Pessoal Administrativo/normas , Radioterapia (Especialidade)/normas , Fatores Sexuais , Centros Médicos Acadêmicos/economia , Centros Médicos Acadêmicos/estatística & dados numéricos , Pessoal Administrativo/economia , Pessoal Administrativo/estatística & dados numéricos , Fatores Etários , Idoso , Orçamentos , Distribuição de Qui-Quadrado , Eficiência , Emprego/estatística & dados numéricos , Docentes de Medicina , Feminino , Humanos , Liderança , Masculino , Pessoa de Meia-Idade , Radioterapia (Especialidade)/economia , Radioterapia (Especialidade)/estatística & dados numéricos , Alocação de Recursos , Cônjuges/estatística & dados numéricos , Inquéritos e Questionários/estatística & dados numéricos , Estados Unidos
9.
J Biomed Opt ; 23(10): 1-9, 2018 10.
Artigo em Inglês | MEDLINE | ID: mdl-30315644

RESUMO

Radiation therapy (RT) is widely and effectively used for cancer treatment but can also cause deleterious side effects, such as a late-toxicity complication called radiation-induced fibrosis (RIF). Accurate diagnosis of RIF requires analysis of histological sections to assess extracellular matrix infiltration. This is invasive, prone to sampling limitations, and thus rarely used; instead, current practice relies on subjective clinical surrogates, including visual observation, palpation, and patient symptomatology questionnaires. This preclinical study demonstrates that functional optical coherence tomography (OCT) is a useful tool for objective noninvasive in-vivo assessment and quantification of fibrosis-associated microvascular changes in tissue. Data were collected from murine hind limbs 6 months after 40-Gy single-dose irradiation and compared with nonirradiated contralateral tissues of the same animals. OCT-derived vascular density and average vessel diameter metrics were compared to quantitative vascular analysis of stained histological slides. Results indicate that RIF manifests significant microvascular changes at this time point posttreatment. Abnormal microvascular changes visualized by OCT in this preclinical setting suggest the potential of this label-free high-resolution noninvasive functional imaging methodology for RIF diagnosis and assessment in the context of clinical RT.


Assuntos
Fibrose/diagnóstico por imagem , Microcirculação/efeitos da radiação , Radioterapia/efeitos adversos , Pele , Tomografia de Coerência Óptica/métodos , Animais , Feminino , Membro Posterior/irrigação sanguínea , Membro Posterior/diagnóstico por imagem , Membro Posterior/efeitos da radiação , Camundongos , Camundongos Endogâmicos C3H , Lesões Experimentais por Radiação/diagnóstico por imagem , Pele/irrigação sanguínea , Pele/diagnóstico por imagem , Pele/efeitos da radiação
10.
Int J Radiat Oncol Biol Phys ; 101(1): 30-45, 2018 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-29477292

RESUMO

PURPOSE: A lack of diversity has been observed in radiation oncology (RO), with women and certain racial/ethnic groups underrepresented as trainees, faculty, and practicing physicians. We sought to gain a nuanced understanding of how to best promote diversity, equity, and inclusion (DEI) based on the insights of RO department chairs, with particular attention given to the experiences of the few women and underrepresented minorities (URMs) in these influential positions. METHODS AND MATERIALS: From March to June 2016, we conducted telephone interviews with 24 RO department chairs (of 27 invited). Purposive sampling was used to invite all chairs who were women (n = 13) or URMs (n = 3) and 11 male chairs who were not URMs. Multiple analysts coded the verbatim transcripts. RESULTS: Five themes were identified: (1) commitment to DEI promotes quality health care and innovation; (2) gaps remain despite some progress with promoting diversity in RO; (3) women and URM faculty continue to experience challenges in various career domains; (4) solutions to DEI issues would be facilitated by acknowledging realities of gender and race; and (5) expansion of the career pipeline is needed. CONCLUSIONS: The chairs' insights had policy-relevant implications. Bias training should broach tokenism, blindness, and intersectionality. Efforts to recruit and support diverse talent should be deliberate and proactive. Bridge programs could engage students before their application to medical school.


Assuntos
Pessoal Administrativo/estatística & dados numéricos , Diversidade Cultural , Docentes de Medicina/estatística & dados numéricos , Grupos Minoritários/estatística & dados numéricos , Seleção de Pessoal , Radio-Oncologistas/estatística & dados numéricos , Radioterapia (Especialidade)/estatística & dados numéricos , Negro ou Afro-Americano/estatística & dados numéricos , Asiático/estatística & dados numéricos , Escolha da Profissão , Docentes de Medicina/normas , Feminino , Previsões , Humanos , Entrevistas como Assunto/métodos , Masculino , Seleção de Pessoal/métodos , Pesquisa Qualitativa , Racismo , Radio-Oncologistas/normas , Radioterapia (Especialidade)/normas , Fatores Sexuais , Sexismo , Estados Unidos , População Branca/estatística & dados numéricos
11.
Int J Radiat Oncol Biol Phys ; 83(5): e563-70, 2012 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-22520480

RESUMO

PURPOSE: To describe and assess an interdisciplinary research training program for graduate students, postdoctoral fellows, and clinical fellows focused on radiation medicine; funded by the Canadian Institutes for Health Research since 2003, the program entitled "Excellence in Radiation Research for the 21st Century" (EIRR21) aims to train the next generation of interdisciplinary radiation medicine researchers. METHODS AND MATERIALS: Online surveys evaluating EIRR21 were sent to trainees (n=56), mentors (n=36), and seminar speakers (n=72). Face-to-face interviews were also conducted for trainee liaisons (n=4) and participants in the international exchange program (n=2). RESULTS: Overall response rates ranged from 53% (mentors) to 91% (trainees). EIRR21 was well received by trainees, with the acquisition of several important skills related to their research endeavors. An innovative seminar series, entitled Brainstorm sessions, imparting "extracurricular" knowledge in intellectual property protection, commercialization strategies, and effective communication, was considered to be the most valuable component of the program. Networking with researchers in other disciplines was also facilitated owing to program participation. CONCLUSIONS: EIRR21 is an innovative training program that positively impacts the biomedical community and imparts valuable skill sets to foster success for the future generation of radiation medicine researchers.


Assuntos
Radioterapia (Especialidade)/educação , Pesquisa/educação , Comércio/educação , Comunicação , Organização do Financiamento , Humanos , Propriedade Intelectual , Comunicação Interdisciplinar , Mentores , Ontário , Avaliação de Programas e Projetos de Saúde , Radioterapia (Especialidade)/normas , Pesquisa/normas , Redação
12.
J Hazard Mater ; 179(1-3): 431-7, 2010 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-20362391

RESUMO

Disintegrated aerobic granules (DAG) as an effective biosorbent had great potential to remove Cu(II) from aqueous solution. The effects of solution pH value, contact time, initial Cu(II) concentration on the biosorption were investigated. Kinetic studies indicate that pseudo-second-order model with correlation coefficients of 0.9999 best fits the Cu(II) biosorption process. Investigation of the biosorption mechanisms shows that Cu(II) biosorption is associated with a significant release of Ca(II). The adsorption capacity of extracted extracellular polymeric substances (EPS) was 2.34 times as much as that of pristine DAG, indicating the significant role of EPS in adsorption. In order to determine the role of different functional groups, DAG was chemically modified to block specific functional groups and was then used in the adsorption of Cu(II). The anionic carboxyl group, was identified as the key binding site for the cationic Cu(II). Results reveal that ion exchange is the most important biosorption mechanism but other mechanisms to some extent like electrostatic interaction, involving in functional groups, also play a part.


Assuntos
Cobre/química , Material Particulado/química , Adsorção , Aerobiose , Análise Custo-Benefício , Concentração de Íons de Hidrogênio , Troca Iônica , Cinética , Microscopia Eletrônica de Varredura , Modelos Químicos , Tamanho da Partícula , Soluções , Espectroscopia de Infravermelho com Transformada de Fourier , Difração de Raios X
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA