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Pesquisa : D27.720.269.430.214 [Categoria DeCS]
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  1 / 24 MEDLINE  
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[PMID]:27488042
[Au] Autor:Nielsen J; Nilsson P; Dahlman-Höglund A; Kronholm Diab K; Albin M; Kåredal M; Jönsson B; Wierzbicka A; Gudmundsson A
[Ad] Endereço:Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University.
[Ti] Título:Dust-free bleaching powder may not prevent symptoms in hairdressers with bleaching-associated rhinitis.
[So] Source:J Occup Health;58(5):470-476, 2016 Sep 30.
[Is] ISSN:1348-9585
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:OBJECTIVE: Hairdressers have an increased risk for airway symptoms especially when using hair-bleaching powder containing persulfate. To minimize exposure, dust-free bleaching powder (DFP) has been made available. We studied the effects of regular powder (RP) or DFP on the airway symptoms of hairdressers with hair-bleaching associated rhinitis. METHODS: Twelve hairdressers each performed three hair-bleachings on a wig in an exposure chamber. Half of the subjects used RP and half used DFP. Exposure to persulfate and ammonia was measured. Before and after each bleaching, the participants stated their degree of airway symptoms on a visual analogue scale. Nasal lavage and blood were sampled before exposure, after the last bleaching, and in the morning after exposure to measure inflammatory markers. RESULTS: Exposure to persulfate was higher when using RP compared to DFP, 22 (11-55) vs. 12 (8-13) µg/m ; median (min-max). Exposure to ammonia did not differ between the groups. Both groups reported an increase in asthma-like symptoms and this increase was significant. Neutrophils, lymphocytes, and monocytes increased after exposure in both groups; monocytes decreased the day after. In nasal lavage, IL-8 was increased the morning after for both types of powder, and the increase was significant in the total group. IL-6 increased immediately after exposure and the day after only in the group using RP. CONCLUSIONS: Although DFP powder emits lower levels of persulfate, effects are still elicited in symptomatic hairdressers.
[Mh] Termos MeSH primário: Amônia/efeitos adversos
Asma/induzido quimicamente
Dimaprit/análogos & derivados
Descolorantes de Cabelo/efeitos adversos
Exposição Ocupacional/efeitos adversos
Rinite/induzido quimicamente
[Mh] Termos MeSH secundário: Indústria da Beleza
Biomarcadores/sangue
Dimaprit/efeitos adversos
Poeira
Seres Humanos
Mucosa Nasal/imunologia
Doenças Profissionais/induzido quimicamente
Espirometria
Escala Visual Analógica
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biomarkers); 0 (Dust); 0 (Hair Bleaching Agents); 17124-82-2 (nordimaprit); 7664-41-7 (Ammonia); ZZQ699148P (Dimaprit)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170714
[Lr] Data última revisão:
170714
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160805
[St] Status:MEDLINE


  2 / 24 MEDLINE  
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[PMID]:27036150
[Au] Autor:Kleniewska A; Wiszniewska M; Krawczyk-Szulc P; Nowakowska-Swirta E; Walusiak-Skorupa J
[Ad] Endereço:Department of Occupational Diseases and Environmental Health, Nofer Institute of Occupational Medicine, 91-348 Lodz, Poland, klen.an@interia.pl.
[Ti] Título:Anaphylactic reaction in a hairdresser due to sensitization to persulphates.
[So] Source:Occup Med (Lond);66(7):584-5, 2016 Oct.
[Is] ISSN:1471-8405
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Severe occupational systemic reactions to persulphates have rarely been described and if so mainly after skin contact with bleaching products. We report the first case of a hairdresser with an allergy to persulphates obtained during professional work, who developed anaphylaxis caused by persulphates present in dental cement during dental treatment. This case documents that sensitization to occupational allergens can induce severe systemic reactions outside the workplace. Additionally, it also recommends the need for greater awareness of medical professionals, including dentists, of the possibility of anaphylaxis in patients with occupational allergy.
[Mh] Termos MeSH primário: Alérgenos/efeitos adversos
Anafilaxia/etiologia
Descolorantes de Cabelo/efeitos adversos
Preparações para Cabelo/efeitos adversos
Exposição Ocupacional/efeitos adversos
[Mh] Termos MeSH secundário: Anafilaxia/complicações
Feminino
Descolorantes de Cabelo/uso terapêutico
Seres Humanos
Meia-Idade
[Pt] Tipo de publicação:CASE REPORTS; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Allergens); 0 (Hair Bleaching Agents); 0 (Hair Preparations)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170912
[Lr] Data última revisão:
170912
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160403
[St] Status:MEDLINE
[do] DOI:10.1093/occmed/kqw037


  3 / 24 MEDLINE  
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[PMID]:26705324
[Au] Autor:Imai T; Higuchi K; Yamamoto Y; Arai S; Nakano T; Tanaka N
[Ad] Endereço:General Research and Development Institute, Hoyu Co., Ltd., 1-12, Roboku, Nagakute-city, Aichi 480-1131, Japan Department of Anatomy, Aichi Medical University School of Medicine, 21, Karimata, Yazako, Nagakute-city, Aichi 480-1195, Japan Takehito_Imai@hoyu.co.jp.
[Ti] Título:Sub-nm 3D observation of human hair melanin by high-voltage STEM.
[So] Source:Microscopy (Oxf);65(2):185-9, 2016 Apr.
[Is] ISSN:2050-5701
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The ultrastructure of melanin granules in human hair was studied using 1,000 kV high-voltage scanning transmission electron microscopy to successfully reconstruct three-dimensional images of the whole melanin granule. It was revealed that the melanin granule was composed of a membrane-like outer structure that included many spherical vesicles, and an inner matrix containing a sheet-like structure in the elongated direction of the melanin granule and a sheet-like arrays structure in the cross direction. The outer structure of the melanin granule was maintained even after exposure to hair-bleaching agents to decompose the melanin granule, suggesting that the outer structure was a highly robust structure and composition compared with the inner matrix .
[Mh] Termos MeSH primário: Cabelo/ultraestrutura
Melaninas/análise
Microscopia Eletrônica de Transmissão e Varredura/métodos
[Mh] Termos MeSH secundário: Grupo com Ancestrais do Continente Asiático
Descolorantes de Cabelo
Seres Humanos
Imagem Tridimensional/métodos
Japão
[Pt] Tipo de publicação:LETTER; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Hair Bleaching Agents); 0 (Melanins)
[Em] Mês de entrada:1701
[Cu] Atualização por classe:170110
[Lr] Data última revisão:
170110
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151226
[St] Status:MEDLINE
[do] DOI:10.1093/jmicro/dfv372


  4 / 24 MEDLINE  
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[PMID]:26371279
[Au] Autor:Nilsson PT; Marini S; Wierzbicka A; Kåredal M; Blomgren E; Nielsen J; Buonanno G; Gudmundsson A
[Ad] Endereço:1.Ergonomics and Aerosol Technology, Lund University, P.O. Box 118, SE-22100, Lund, Sweden; patrik.nilsson@design.lth.se.
[Ti] Título:Characterization of Hairdresser Exposure to Airborne Particles during Hair Bleaching.
[So] Source:Ann Occup Hyg;60(1):90-100, 2016 Jan.
[Is] ISSN:1475-3162
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Respiratory symptoms among hairdressers are often ascribed to the use of bleaching powders that contain persulfate salts. Such salts can act as allergens and airway irritants but the mechanisms behind the negative health effects are not fully known. In order to understand why some hairdressers experience respiratory symptoms during, and after, sessions of hair bleaching, it is of importance to characterize how exposure occurs. In this work we used time and particle size resolved instrumentation with the aim to measure the concentration of particles that hairdressers are exposed to during sessions of hair bleaching. We also used filter samples to collect particles for quantitative determination of persulfate (S2O8(2-)) content and for analysis by light microscopy. Two different types of bleaching powders were used, one marked as dust-free and one without this marking (denoted regular). The time resolved instrumentation revealed that particles <10 µm were emitted, specifically when the regular powder was prepared and mixed with hydrogen peroxide. In contrast to other research our work also revealed that supercoarse particles (>10 µm) were emitted during application of the bleaching, when both the regular and the dust-free powders were used. The measured level of persulfate, sampled in the breathing zone of the hairdressers, was on average 26 µg m(-3) when the regular powder was used and 11 µg m(-3) when the dust-free powder was used. This indicates that use of dust-free powder does not eliminate exposure to persulfates, it only lowers the concentration. We show that the site of sampling, or position of the hairdresser with regards to the hair being bleached, is of high importance in the determination of persulfate levels and exposure. This work focuses on the physical and chemical characterization of the particles released to the air and the results are important for accurate exposure assessments. Accurate assessments may in turn lead to a better understanding of why some hairdressers experience respiratory symptoms from hair bleaching sessions.
[Mh] Termos MeSH primário: Poluentes Ocupacionais do Ar/análise
Indústria da Beleza
Descolorantes de Cabelo/análise
Exposição por Inalação/análise
Exposição Ocupacional/análise
[Mh] Termos MeSH secundário: Alérgenos/análise
Poeira/análise
Seres Humanos
Tamanho da Partícula
Compostos de Sódio/análise
Sulfatos/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Air Pollutants, Occupational); 0 (Allergens); 0 (Dust); 0 (Hair Bleaching Agents); 0 (Sodium Compounds); 0 (Sulfates); J49FYF16JE (sodium persulfate)
[Em] Mês de entrada:1608
[Cu] Atualização por classe:151224
[Lr] Data última revisão:
151224
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150916
[St] Status:MEDLINE
[do] DOI:10.1093/annhyg/mev063


  5 / 24 MEDLINE  
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[PMID]:25546367
[Au] Autor:Mörtstedt H; Ali N; Kåredal M; Jacobsson H; Rietz E; Diab KK; Nielsen J; Jönsson BA; Lindh CH
[Ad] Endereço:Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University , SE-221 85 Lund, Sweden.
[Ti] Título:Targeted proteomic analyses of nasal lavage fluid in persulfate-challenged hairdressers with bleaching powder-associated rhinitis.
[So] Source:J Proteome Res;14(2):860-73, 2015 Feb 06.
[Is] ISSN:1535-3907
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Hairdressers have an increased risk for developing airway symptoms, for example, asthma and rhinitis. Persulfates, which are oxidizing agents in bleaching powder, are considered important causal agents for these symptoms. However, the underlying mechanisms are unclear. The aim was therefore to measure proteomic changes in nasal lavage fluid from persulfate-challenged subjects to identify proteins potentially involved in the pathogenesis of bleaching powder-associated rhinitis or candidate effect biomarkers for persulfate. Also, oxidized peptides were measured to evaluate their usefulness as biomarkers for persulfate exposure or effect, for example, oxidative stress. Samples from hairdressers with and without bleaching powder-associated rhinitis were analyzed with liquid chromatography tandem mass spectrometry using selected reaction monitoring to target 246 proteins and five oxidized peptides. Pathway analysis was applied to obtain a functional overview of the proteins. Several proteins involved in biologically meaningful pathways, functions, or disorders, for example, inflammatory responses, oxidative stress, epithelium integrity, and dermatological disorders, changed after the persulfate challenge. A list with nine proteins that appeared to be affected by the persulfate challenge and should be followed up was defined. An albumin peptide containing oxidized tryptophan increased 2 h and 5 h after the challenge but not after 20 min, which indicates that such peptides may be useful as oxidative stress biomarkers.
[Mh] Termos MeSH primário: Indústria da Beleza
Descolorantes de Cabelo/farmacologia
Líquido da Lavagem Nasal/química
Exposição Ocupacional/análise
Compostos de Potássio/farmacologia
Proteoma
Rinite/metabolismo
Sulfatos/farmacologia
[Mh] Termos MeSH secundário: Feminino
Seres Humanos
Proteoma/análise
Proteoma/química
Proteoma/efeitos dos fármacos
Proteômica
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Hair Bleaching Agents); 0 (Potassium Compounds); 0 (Proteome); 0 (Sulfates); 6B86K0MCZC (potassium persulfate)
[Em] Mês de entrada:1603
[Cu] Atualização por classe:150206
[Lr] Data última revisão:
150206
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141230
[St] Status:MEDLINE
[do] DOI:10.1021/pr5009306


  6 / 24 MEDLINE  
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[PMID]:25047217
[Au] Autor:Cuypers E; Flinders B; Bosman IJ; Lusthof KJ; Van Asten AC; Tytgat J; Heeren RMA
[Ad] Endereço:FOM-Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands; KU Leuven Toxicology and Pharmacology, Herestraat 49, PO 922, 3000 Leuven, Belgium.
[Ti] Título:Hydrogen peroxide reactions on cocaine in hair using imaging mass spectrometry.
[So] Source:Forensic Sci Int;242:103-110, 2014 Sep.
[Is] ISSN:1872-6283
[Cp] País de publicação:Ireland
[La] Idioma:eng
[Ab] Resumo:Today, forensic hair analysis is considered to be a standard method for identifying chronic drug users since information about drug use stored and located in hair can cover several months to even years. When interpreting these results, one should be aware of all kind of pitfalls. External factors such as bleaching might influence the analytical result. Although the effect of hydrogen peroxide on cocaine in a solution was described before, it was never investigated whether the described reaction products (ecgonine methylester, benzoylecgonine, hydroxynorcocaine and dihydroxycocaine) are indeed found on contaminated or user hair. Since it is of great importance in forensic hair analysis to know whether cocaine and/or reaction products are detectable in hair after bleaching, matrix-assisted laser desorption/ionization mass spectrometric imaging (MALDI-MSI) was used to study the effect of hydrogen peroxide treatment on incorporated cocaine in hairs. Cocaine oxidation products were identified in a solution based on MS/MS spectra and spatial distribution of these products in hair was explored using MALDI TOF-MS. All images were accomplished by spraying α-Cyano-4-hydroxycinnamic acid (CHCA) as a MALDI-matrix. Images revealed a loss of detectability of cocaine and its reaction products in hairs already after a short bleaching period. Since all compounds of interest are found in the hydrogen peroxide and wash solution, these findings indicate that all evidence of cocaine use might be lost after a hair bleaching treatment. Therefore, forensic toxicologists should take into consideration whether hair samples were bleached before making any conclusions from hair analysis results.
[Mh] Termos MeSH primário: Cocaína/análise
Descolorantes de Cabelo/farmacologia
Cabelo/química
Peróxido de Hidrogênio/farmacologia
Entorpecentes/análise
[Mh] Termos MeSH secundário: Transtornos Relacionados ao Uso de Cocaína/diagnóstico
Toxicologia Forense
Seres Humanos
Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz
Detecção do Abuso de Substâncias
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Hair Bleaching Agents); 0 (Narcotics); BBX060AN9V (Hydrogen Peroxide); I5Y540LHVR (Cocaine)
[Em] Mês de entrada:1510
[Cu] Atualização por classe:170918
[Lr] Data última revisão:
170918
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140723
[St] Status:MEDLINE


  7 / 24 MEDLINE  
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[PMID]:24937436
[Au] Autor:Richena M; Silveira M; Rezende CA; Joekes I
[Ad] Endereço:Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13084-971 Campinas, SP, Brazil.
[Ti] Título:Yellowing and bleaching of grey hair caused by photo and thermal degradation.
[So] Source:J Photochem Photobiol B;138:172-81, 2014 Sep 05.
[Is] ISSN:1873-2682
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:Yellowing is an undesirable phenomenon that is common in people with white and grey hair. Because white hair has no melanin, the pigment responsible for hair colour, the effects of photodegradation are more visible in this type of hair. The origin of yellowing and its relation to photodegradation processes are not properly established, and many questions remain open in this field. In this work, the photodegradation of grey hair was investigated as a function of the wavelength of incident radiation, and its ultrastructure was determined, always comparing the results obtained for the white and black fibres present in grey hair with the results of white wool. The results presented herein indicate that the photobehaviour of grey hair irradiated with a mercury lamp or with solar radiation is dependent on the wavelength range of the incident radiation and on the initial shade of yellow in the sample. Two types of grey hair were used: (1) blended grey hair (more yellow) and (2) grey hair from a single-donor (less yellow). After exposure to a full-spectrum mercury lamp for 200 h, the blended white hair turned less yellow (the yellow-blue difference, Db(*) becomes negative, Db(*)=-6), whereas the white hair from the single-donor turned slightly yellower (Db(*)=2). In contrast, VIS+IR irradiation resulted in bleaching in both types of hair, whereas a thermal treatment (at 81 °C) caused yellowing of both types of hair, resulting in a Db(*)=3 for blended white hair and Db(*)=9 for single-donor hair. The identity of the yellow chromophores was investigated by UV-Vis spectroscopy. The results obtained with this technique were contradictory, however, and it was not possible to obtain a simple correlation between the sample shade of yellow and the absorption spectra. In addition, the results are discussed in terms of the morphology differences between the pigmented and non-pigmented parts of grey hair, the yellowing and bleaching effects of grey hair, and the occurrence of dark-follow reactions.
[Mh] Termos MeSH primário: Corantes/química
Descolorantes de Cabelo/química
Cabelo/efeitos da radiação
Luz
[Mh] Termos MeSH secundário: Seres Humanos
Fotólise
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Coloring Agents); 0 (Hair Bleaching Agents)
[Em] Mês de entrada:1503
[Cu] Atualização por classe:140802
[Lr] Data última revisão:
140802
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140618
[St] Status:MEDLINE


  8 / 24 MEDLINE  
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[PMID]:24817057
[Au] Autor:Agius R; Dufaux B; Kahl HG; Nadulski T
[Ad] Endereço:Department of Forensic and Clinical Toxicology, Siemensstrasße 40, 32105 Bad Salzuflen, Germany.
[Ti] Título:Is urine an alternative to cosmetically treated hair for the detection of drugs and alcohol?
[So] Source:Drug Test Anal;6 Suppl 1:120-2, 2014 Jun.
[Is] ISSN:1942-7611
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:This study attempts to assess the utility of the urine matrix as an alternative to cosmetically treated hair for the detection of drugs and alcohol for driving licence re-granting in 1026 cosmetically treated hair samples and 33 262 urine routine samples. No significant difference was observed between the percentage positive samples in cosmetically treated hair to those in urine at both the 95% and 99% significance level for amphetamines, cocaine, opiates, benzodiazepines, and methadone. Significant difference was found between the positivity rates of cannabinoids in cosmetically treated hair and that in urine indicating urine to be a better alternative to the use of the hair matrix even when cosmetically treated. The opposite was observed for the alcohol consumption marker ethyl glucuronide (EtG) for which the positivity rate in cosmetically treated hair was twice that in urine samples. Particularly for alcohol abstinence monitoring, as for the rehabilitative driving licence re-granting medical and psychological assessment (MPA) programme in Germany, it seems that ethyl glucuronide (EtG) in hair presents a much better alternative than urine testing, even when cosmetically treated hair is analyzed. Moreover, segmentation is an additional advantage of hair testing which can provide additional useful information.
[Mh] Termos MeSH primário: Etanol/análise
Descolorantes de Cabelo/química
Tinturas para Cabelo/química
Cabelo/química
Drogas Ilícitas/análise
Detecção do Abuso de Substâncias/métodos
Urinálise/métodos
[Mh] Termos MeSH secundário: Etanol/urina
Seres Humanos
Drogas Ilícitas/urina
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Hair Bleaching Agents); 0 (Hair Dyes); 0 (Street Drugs); 3K9958V90M (Ethanol)
[Em] Mês de entrada:1503
[Cu] Atualização por classe:160511
[Lr] Data última revisão:
160511
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140513
[St] Status:MEDLINE
[do] DOI:10.1002/dta.1629


  9 / 24 MEDLINE  
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[PMID]:24656996
[Au] Autor:Guerra-Tapia A; Gonzalez-Guerra E
[Ad] Endereço:Departamento de Medicina, Universidad Complutense de Madrid, Madrid, España. Electronic address: auroraguerratapia@gmail.com.
[Ti] Título:Hair cosmetics: dyes.
[So] Source:Actas Dermosifiliogr;105(9):833-9, 2014 Nov.
[Is] ISSN:1578-2190
[Cp] País de publicação:Spain
[La] Idioma:eng; spa
[Ab] Resumo:Hair plays a significant role in body image, and its appearance can be changed relatively easily without resort to surgical procedures. Cosmetics and techniques have therefore been used to change hair appearance since time immemorial. The cosmetics industry has developed efficient products that can be used on healthy hair or act on concomitant diseases of the hair and scalp. Dyes embellish the hair by bleaching or coloring it briefly, for temporary periods of longer duration, or permanently, depending on the composition of a dye (oxidative or nonoxidative) and its degree of penetration of the hair shaft. The dermatologist's knowledge of dyes, their use, and their possible side effects (contact eczema, cancer, increased porosity, brittleness) can extend to an understanding of cosmetic resources that also treat hair and scalp conditions.
[Mh] Termos MeSH primário: Tinturas para Cabelo
[Mh] Termos MeSH secundário: Indústria da Beleza/legislação & jurisprudência
Pré-Escolar
Dermatite Alérgica de Contato/etiologia
Estética
União Europeia
Feminino
Feto/efeitos dos fármacos
Cabelo/efeitos dos fármacos
Cabelo/ultraestrutura
Descolorantes de Cabelo/efeitos adversos
Cor de Cabelo/efeitos dos fármacos
Doenças do Cabelo/induzido quimicamente
Tinturas para Cabelo/efeitos adversos
Tinturas para Cabelo/química
Tinturas para Cabelo/classificação
Preparações para Cabelo/efeitos adversos
Preparações para Cabelo/química
Seres Humanos
Lactente
Leucemia/etiologia
Masculino
Neoplasias/induzido quimicamente
Gravidez
Efeitos Tardios da Exposição Pré-Natal
Dermatopatias/induzido quimicamente
Espanha
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Hair Bleaching Agents); 0 (Hair Dyes); 0 (Hair Preparations)
[Em] Mês de entrada:1610
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140325
[St] Status:MEDLINE


  10 / 24 MEDLINE  
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[PMID]:24506326
[Au] Autor:Kojima T; Yamada H; Isobe M; Yamamoto T; Takeuchi M; Aoki D; Matsushita Y; Fukushima K
[Ad] Endereço:General Research & Development Institute, Hoyu Co., Ltd., Nagakute, Aichi, Japan.
[Ti] Título:Compositional changes of human hair melanin resulting from bleach treatment investigated by nanoscale secondary ion mass spectrometry.
[So] Source:Skin Res Technol;20(4):416-21, 2014 Nov.
[Is] ISSN:1600-0846
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND/PURPOSE: It is important to understand the influence of bleach treatment on human hair because it is one of the most important chemical treatments in hair cosmetic processes. A comparison of the elemental composition of melanin between virgin hair and bleached hair would provide important information about the structural changes of melanin. To investigate the elemental composition of melanin granules in virgin black hair and bleached hair, these hair cross-sections are analyzed by using a nanoscale secondary ion mass spectrometry (NanoSIMS). METHODS: The virgin black hair and bleached hair samples were embedded in resin and smooth hair cross-sections were obtained using an ultramicrotome. NanoSIMS measurements were performed using a Cs(+) primary ion beam to detect negative secondary ions. RESULTS: More intensive (16) O(-) ions were detected from the melanin granules of bleached hair than from those of virgin black hair in NanoSIMS (16) O(-) ion image. In addition, it was indicated that (16) O(-) ion intensity and (16) O(-) /(12) C(14) N(-) ion intensity ratio of melanin granules in bleached hair were higher than those in virgin black hair. CONCLUSION: Nanoscale secondary ion mass spectrometry analysis of the cross-sections of virgin black hair and bleached hair indicated that the oxygen content in melanin granules was increased by bleach treatment.
[Mh] Termos MeSH primário: Descolorantes de Cabelo/química
Cabelo/química
Melaninas/química
Oxigênio/química
Espectrometria de Massas por Ionização por Electrospray/métodos
[Mh] Termos MeSH secundário: Seres Humanos
Oxirredução
Oxigênio/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL
[Nm] Nome de substância:
0 (Hair Bleaching Agents); 0 (Melanins); S88TT14065 (Oxygen)
[Em] Mês de entrada:1506
[Cu] Atualização por classe:141009
[Lr] Data última revisão:
141009
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140211
[St] Status:MEDLINE
[do] DOI:10.1111/srt.12133



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