All Stories

  1. No association between psychiatric symptoms and doses of anabolic steroids in a cohort of male and female bodybuilders
  2. Effective treatment and prevention of attempted suicide, anxiety, and aggressiveness with fluoxetine, despite proven use of androgenic anabolic steroids
  3. Development of a sensitive and fast method for detection of catecholamines and metabolites by HRMS
  4. A pilot study of non-targeted screening for stimulant misuse using high-resolution mass spectrometry
  5. New approaches to monitor semi-volatile organic compounds released during coffee roasting using flow-through/active sampling and comprehensive two-dimensional gas chromatography
  6. Detection of ESAs in equine urine and blood by SAR‐PAGE
  7. Human Metabolism of The Anabolic Steroid Methasterone: Detection and Kinetic Excretion of New Phase I Urinary Metabolites and Investigation of Phase II Metabolism by GC-MS and UPLC-MS/MS
  8. Feasibility study for the development of a certified reference material of nitrofuran metabolites in chicken breast muscle from incurred samples
  9. Development and validation of a multidimensional gas chromatography/combustion/isotope ratio mass spectrometry-based test method for analyzing urinary steroids in doping controls
  10. Zebrafish ( Danio rerio ) water tank model for the investigation of drug metabolism: Progress, outlook, and challenges
  11. Lipase-catalysed esters synthesis of cafestol and kahweol
  12. Corrigendum to “Optimization of a multiresidue and multiclass analysis method for anabolic agents and β2-agonists in bovine urine by GC–MS/MS” [Microchem. J. 133 (2017) 551–555]
  13. Improving quantitative 13 C NMR performance by an adiabatic scheme
  14. Comprehensive analysis by liquid chromatography Q-Orbitrap mass spectrometry: Fast screening of peptides and organic molecules
  15. Occurrence of extended tetracyclic polyprenoid series in crude oils
  16. Analysis of underivatised low volatility compounds by comprehensive two-dimensional gas chromatography with a short primary column
  17. Fast Ephedrine Quantification by Gas Chromatography Mass Spectrometry
  18. Doping control analysis at the Rio 2016 Olympic and Paralympic Games
  19. Is zebrafish ( Danio rerio ) a tool for human-like metabolism study?
  20. Asymmetric bioreduction of β-ketoesters derivatives by Kluyveromyces marxianus: influence of molecular structure on the conversion and enantiomeric excess
  21. Non-targeted acquisition strategy for screening doping compounds based on GC-EI-hybrid quadrupole-Orbitrap mass spectrometry: A focus on exogenous anabolic steroids
  22. Atmospheric distribution of organic compounds from urban areas near Olympic games sites in Rio de Janeiro, Brazil
  23. Optimization of a multiresidue and multiclass analysis method for anabolic agents and β2-agonists in bovine urine by GC-MS/MS
  24. Characterization of unusual tetracyclic compounds and possible novel maturity parameters for Brazilian crude oils using comprehensive two-dimensional gas chromatography-time of flight mass spectrometry
  25. Using porcine bone marrow to analyze fenproporex and its metabolite amphetamine for forensic toxicological purposes: method development and validation
  26. Optimization of an online heart-cutting multidimensional gas chromatography clean-up step for isotopic ratio mass spectrometry and simultaneous quadrupole mass spectrometry measurements of endogenous anabolic steroid in urine
  27. Comparative profile of pollutants generated by a stationary engine fueled with diesel, biodiesel, and ethanol
  28. Running ahead of doping: analytical advances and challenges faced by modern laboratories ahead of Rio 2016
  29. Treatment of an industrial stream containing vinylcyclohexene by the H2O2/UV process
  30. Evaluation of the organic matter sources and δ13C composition of individual alkanes for the baseline assessment of hydrocarbons in a pristine area from Amazon region, Brazil
  31. Multiresidue method for simultaneous analysis of aflatoxin M1, avermectins, organophosphate pesticides and milbemycin in milk by ultra-performance liquid chromatography coupled to tandem mass spectrometry
  32. Concentration Profiles of Regulated and Unregulated Pollutants Emitted from the Combustion of Soybean Biodiesel and Diesel/Biodiesel Blend Originating of a Diesel Cycle Engine
  33. Quantification of trace O-containing compounds in GTL process samples via Fischer–Tropsch reaction by comprehensive two-dimensional gas chromatography/mass spectrometry
  34. New approaches on the analyses of thermolabile coffee diterpenes by gas chromatography and its relationship with cup quality
  35. Systematic analysis of glycerol: colourimetric screening and gas chromatography-mass spectrometric confirmation
  36. Thermodynamic-based retention time predictions of endogenous steroids in comprehensive two-dimensional gas chromatography
  37. Source identification of sea surface oil with geochemical data in Cantarell, Mexico
  38. High resolution molecular organic geochemistry assessment of Brazilian lacustrine crude oils
  39. Glycerol as green solvent for efficient obtention of beta-hydroxyesters
  40. Inborn Errors of Metabolism, an Important Group of Orphan Neglected Diseases: Investigation of 8,000 Patients in Rio de Janeiro, Brazil
  42. Identification of sympathomimetic alkylamine agents in urine using liquid chromatography–mass spectrometry and comparison of derivatization methods for confirmation analyses by gas chromatography–mass spectrometry
  43. Salbutamol extraction from urine and its stability in different solutions: identification of methylation products and validation of a quantitative analytical method
  44. Enantioselective bioreduction of ethyl 4,4,4-trihalide-3-oxobutanoate by Kluyveromyces marxianus
  45. Detection of designer steroid methylstenbolone in “nutritional supplement” using gas chromatography and tandem mass spectrometry: Elucidation of its urinary metabolites
  46. Characterization of aromatic steroids and hopanoids in marine and lacustrine crude oils using comprehensive two dimensional gas chromatography coupled to time-of-flight mass spectrometry (GCxGC-TOFMS)
  47. Evaluation of the organic matter sources using the δ13C composition of individual n-alkanes in sediments from Brazilian estuarine systems by GC/C/IRMS
  48. Quantitative approach to glucocorticosteroids analysis in human urine using LC-MS/MS
  49. Development and validation of a ultra high performance liquid chromatography–tandem mass spectrometric method for the direct detection of formoterol in human urine
  50. 2H/1H ratio of hopanes, tricyclic and tetracyclic terpanes in oils and source rocks from the Potiguar Basin, Brazil
  51. Determination of six pterins in urine by LC–MS/MS
  52. Biomarkers in crude oil revealed by comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry: Depositional paleoenvironment proxies
  53. Increased atherothrombotic markers and endothelial dysfunction in steroid users
  54. Comprehensive two-dimensional gas chromatography with time of flight mass spectrometry applied to analysis of Fischer-Tropsch synthesis products obtained with and without carbon dioxide addition to feed gas
  55. Detection of new exemestane metabolites by liquid chromatography interfaced to electrospray-tandem mass spectrometry
  56. Distribution of indoor air pollutants in downtown Rio de Janeiro, Brazil
  57. Detection of new urinary exemestane metabolites by gas chromatography coupled to mass spectrometry
  58. Comprehensive two-dimensional gas chromatography with time of flight mass spectrometry applied to biomarker analysis of oils from Colombia
  59. Identification of Methylhopane and Methylmoretane Series in Ceará Basin Oils, Brazil, Using Comprehensive Two-Dimensional Gas Chromatography Coupled to Time-of-Flight Mass Spectrometry
  60. Speciation of water-soluble inorganic, organic, and total nitrogen in a background marine environment: Cloud water, rainwater, and aerosol particles
  61. Analysis of volatiles in fluid inclusions by direct online crushing mass spectrometry
  62. Consequences of the formation of 3,4-dimethyl-5-phenyl-1,3-oxazolidine on the analysis of ephedrines in urine by gas chromatography and a new method for confirmation as N-trifluoroacetyl-O-t-butyldimethylsilyl ether derivatives
  63. Development and validation of analytical method for sulfonamide residues in eggs by liquid chromatography Tandem Mass Spectrometry based on the Comission Decision 2002/657/EC
  64. Asthma Among Office Workers And Exposure To Chemical And Biological Indoor Pollutants
  65. Sick Building Syndrome (SBS) Among Office Workers and Exposure to Indoor Fungal Allergens in Rio de Janeiro, Brazil
  66. Development and validation of a method for the analysis of tetracyclines in chicken-muscle by liquid chromatography-electrospray-mass spectrometry in tandem (LC-ESI-MS/MS)
  67. Plasma volume expanders: use in medicine and detecting misuse in sports
  68. Study of the endogenous steroid profile of male athletes from the Brazilian National Soccer Championship 2009
  69. Analysis of exemestane and 17β-hydroxyexemestane in human urine by gas chromatography/mass spectrometry: development and validation of a method using MO-TMS derivatives
  70. Application of comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry to biomarker characterization in Brazilian oils
  71. Screening for hydroxyethyl starch (HES) doping in sport
  72. Immobilized microorganisms in the reduction of ethyl benzoylacetate
  73. Symptoms prevalence among office workers of a sealed versus a non-sealed building: Associations to indoor air quality
  74. Tetrahydrogestrinone analysis and designer steroids revisited
  75. Analysis of phytoestrogens, progestogens and estrogens in environmental waters from Rio de Janeiro (Brazil)
  76. Immobilized microorganisms in the reduction of ethyl 4-chloro acetoacetate
  77. Analysis of sibutramine metabolites as N-trifluoroacetamide and O-trimethylsilyl derivatives by gas chromatography–mass spectrometry in urine
  78. Drug testing data from the 2007 Pan American Games: δ 13C values of urinary androsterone, etiocholanolone and androstanediols determined by GC/C/IRMS
  79. Analytical challenges in doping control: Comprehensive two-dimensional gas chromatography with time of flight mass spectrometry, a promising option
  80. On the microbial reduction of ethyl α-methylacetoacetate
  81. TiO2-Photocatalyzed degradation of phenol in saline media in an annular reactor: hydrodynamics, lumped kinetics, intermediates, and acute toxicity
  82. Analytical and logistical improvements in doping-control analysis at the 2007 Pan-American Games
  83. Effect of biodegradation on biomarkers released from asphaltenes
  84. A Glimpse of Recent Developments in Brazilian Analytical Chemistry
  85. Microbial reduction of alpha-substituted-alpha-acetyl-gamma-butyrolactones
  86. Quantitative evaluation of sedimentary organic matter from Laguna Mar Chiquita, Argentina
  87. Study of endogenous profile of hCG in male Brazilian athletes
  88. Polycyclic Aromatic Hydrocarbons in Fishes and Sediments from the Guanabara Bay, Brazil
  89. Prevalence of Symptoms Associated with Elevated Total Volatile Organic Compounds (TVOCs) Levels in Workers at a Printing Facility
  90. Uric acid changes in urine and plasma: An effective tool in screening for purine inborn errors of metabolism and other pathological conditions
  91. Analysis of synthetic 19-norsteroids trenbolone, tetrahydrogestrinone and gestrinone by gas chromatography–mass spectrometry
  92. Letter to the Editor
  93. Delirium Following Ingestion of Marijuana Present in Chocolate Cookies
  94. Improvements in steroid screening in doping control with special emphasis to GC-MS analytical conditions and method validation
  95. Thirteenth National Analytical Chemistry Meeting and First Ibero–American Analytical Chemistry Congress (Brazil, 2005)
  96. Microbial reduction of α-acetyl-γ-butyrolactone
  97. Lumped kinetics and acute toxicity of intermediates in the ozonation of phenol in saline media
  98. O Quadrante de Ruetsap e a anti-ciência, tecnologia e inovação
  99. Políticas públicas: serviços, inclusão social, saúde pública e metrologia
  100. A destilação simulada na indústria do petróleo
  101. New microbiological catalytic accesses to (S)-fluoxetine
  102. Electrospray ionization mass and tandem mass spectra of a series ofN-pyrazolylmethyl andN-triazolylmethylN-phenylpiperazines: new dopaminergic ligands with potential antipsychotic properties
  103. Evaluation of air quality in Volta Redonda, the main metallurgical industrial city in Brazil
  104. TiO2-photocatalyzed degradation of phenol in saline media: lumped kinetics, intermediates, and acute toxicity
  105. Controle antidoping no Brasil: resultados do ano de 2003 e atividades de prevenção
  106. Two decades of high temperature gas chromatography (1983–2003): what's next?
  107. Studies on diastereoselective reduction of cyclic β-ketoesters with boron hydrides. Part 4: The reductive profile of functionalized cyclohexanone derivatives
  108. Atmospheric distribution of organic compounds from urban areas near a coal-fired power station
  109. Chemical composition and microbicidal activity of extracts from Brazilian and Bulgarian propolis
  110. Incidental Clostebol Contamination in Athletes after Sexual Intercourse
  111. Considerações sobre estudos de ambientes industriais e não industriais no Brasil: uma abordagem comparativa
  112. Flavonoids and trypanocidal activity of Bulgarian propolis
  113. Microbiological enantioselective reduction of ethyl acetoacetate
  114. Poluição química relacionada ao ar de interiores no Brasil
  115. Comparison of propolis from Apis mellifera and Tetragonisca angustula
  116. Controle de dopagem de anabolizantes: o perfil esteroidal e suas regulações
  117. Chiral separation of γ-butyrolactone derivatives by gas chromatography on 2,3-di-O-methyl-6-O-tert.-butyldimethylsilyl-β-cyclodextrin
  118. Determination of stavudine in human serum by on-line solid-phase extraction coupled to high-performance liquid chromatography with electrospray ionization tandem mass spectrometry: application to a bioequivalence study
  119. Improvement in steroid screening for doping control with special emphasis on stanozolol
  120. Análise de glicocorticosteróides por CG-EM: uma nova abordagem de derivatização para o controle de dopagem no esporte
  121. Three series of high molecular weight alkanoates found in Amazonian plants
  122. Lupeol Alkanoates in Brazilian Propolis
  123. Validation of the determination of oxymetholone in human plasma analysis using gas chromatography–mass spectrometryApplication to pharmacokinetic studies
  124. Linalool fromLippia alba:  Study of the Reproducibility of the Essential Oil Profile and the Enantiomeric Purity
  125. Selected organic compounds from biomass burning found in the atmospheric particulate matter over sugarcane plantation areas
  126. Identification and seasonal variation of atmospheric organic pollutants in Campos dos Goytacazes, Brazil
  127. Própolis: 100 anos de pesquisa e suas perspectivas futuras
  128. High-temperature gas chromatography–mass spectrometry with glass capillary columns for the screening of natural products
  130. Exposure to High Levels of Volatile Organic Compounds and Other Pollutants in a Printing Facility in Rio de Janeiro, Brazil
  131. Possible origin of acyclic (linear and isoprenoid) and tricyclic terpane methyl ketones in a Tasmanian tasmanite bitumen
  132. Further lipophilic flavonols in Vellozia graminifolia (Velloziaceae) by high temperature gas chromatography: quick detection of new compounds
  133. Rapid Screening of Polar Compounds in Brazilian Propolis by High-Temperature High-Resolution Gas Chromatography−Mass Spectrometry
  134. Performance of Capillary Columns for High-Temperature Gas Chromatography
  135. Chiral Gas Chromatographic Separation of 2-Oxabicyclo[3.3.0]octane Derivatives and Their Synthetic Precursors
  136. Application of High-Temperature Gas Chromatography−Mass Spectrometry to the Investigation of Glycosidically Bound Components Related to Cashew Apple (Anacardium occidentaleL. Var.nanum) Volatiles
  137. Determination of  2-Agonists in Bovine Urine: Comparison of Two Extraction/Clean-Up Procedures for High-Resolution Gas Chromatography-Mass Spectrometry Analysis
  138. Identification of Isoquinoline alkaloids in crude extracts by high temperature gas chromatography‐mass spectrometry
  139. High-temperature high-resolution gas chromatography: breaching the barrier to the analysis of polar and high molecular weight compounds
  140. A qualidade do ar de interiores e a química
  141. Characterization of organic pollutants in industrial effluents by high-temperature gas chromatography–mass spectrometry
  142. Distributions of Indoor and Outdoor Air Pollutants in Rio de Janeiro, Brazil:  Implications to Indoor Air Quality in Bayside Offices
  143. Development and Validation of a Screening Method for DES, Zeranol, and  -Zearalanol in Bovine Urine by HRGC-MS and Evaluation of Robustness for Routine Survey of the Brazilian Herd
  144. Occurrence of Airborne Bacteria and Fungi in Bayside Offices in Rio de Janeiro, Brazil
  145. Extended ketones of the tricyclic terpane series in a Tasmanian tasmanite bitumen
  146. Diastereomeric Analysis of Bioactive N-Phenylpyrazole-4-acylhydrazone Derivatives by High Resolution Gas Chromatography
  147. Volatile Organic Compounds: Distribution in Offices and Restaurants in the Cities of Rio de Janeiro and São Paulo (Brazil)
  148. Improvement of enantioselective syntheses and chiral high resolution gas chromatographic analyses of (+)-2-allyl-2-carboethoxy-cyclopentanol
  149. Composition of green coffee water-soluble fractions and identification of volatiles formed during roasting
  150. The GC/MS Identification of Volatiles Formed During the Roasting of High Molecular Mass Coffee Aroma Precursors
  151. Characterization of Indoor Air Quality in the Cities of Sao Paulo and Rio de Janeiro, Brazil
  152. Mass spectrometric characteristics of two novel series of ring-C monounsaturated tricyclic terpenes found in Tasmanian tasmanite
  153. Extended saturated and monoaromatic tricyclic terpenoid carboxylic acids found in Tasmanian tasmanite
  154. Absorption Processes of n-Butenes in Sulfuric Acid. 1. Determination of Di-sec-butyl Sulfate, Di-sec-Butyl Ether, and sec-Butyl Alcohol by High-Resolution Gas Chromatography
  155. Functionalized biological precursors of tricyclic terpanes: information from sulfur-bound biomarkers in a Permian tasmanite
  156. Application of high temperature high resolution gas chromatography to paraffinic deposits in petroleum production pipelines
  157. Extended tricyclic terpanes in sediments and petroleums
  158. Unusual carbon isotope compositions of biomarker hydrocarbons in a Permian tasmanite
  159. 35 P 30 UV-respirable suspended particles as a marker of ETS in indoor atmospheres in urban cities of Brazil?
  160. Organic geochemistry of geographically unrelated tasmanites
  161. Novel series of tricyclic aromatic terpanes characterized in Tasmanian tasmanite
  162. Mass spectrometric characteristics of a novel series of ring-c monoaromatic tricyclic terpanes found in Tasmanian tasmanite
  163. On the presence of tricyclic terpane hydrocarbons in permian tasmanite algae
  164. Diterpenoids from Dypterix odorata
  165. Occurrence of four stereoisomeric tricyclic terpane series in immature Brazilian shales
  166. Biomarker stratigraphy of the lower cretaceous of Espirito Santo Basin, Brazil
  167. Quantitative determination of cardanol constituents by CGC
  168. Evolution of tricyclic alkanes in the Espirito Santo Basin, Brazil
  169. Evolution of polycyclic alkanes in the Espirito Santo Basin
  170. Synthetic intermediates derived from triterpenoids by the retro-michael reaction in the vapour phase
  171. A Versatile System for Quantitative Gas Analysis by GC
  172. Novel tricyclic terpanes (C19, C20) in sediments and petroleums