Results 31 to 40 of about 2,581 (174)

Oxidation of Citalopram with Sodium Hypochlorite and Chlorine Dioxide: Influencing Factors and NDMA Formation Kinetics

open access: yesMolecules, 2019
The highly prescribed antidepressant, citalopram, as one of newly emerging pollutants, has been frequently detected in the aquatic environment. Citalopram oxidation was examined during sodium hypochlorite (NaOCl) and chlorine dioxide (ClO2) chlorination ...
Juan Lv, Yan Wang, Na Li
doaj   +1 more source

Comprehensive computational study on reaction mechanism of N-Nitroso dimethyl amine formation from substituted hydrazine derivatives during ozonation

open access: yesHeliyon, 2023
N- Nitrosodimethyl amine, the simplest member of the N-Nitrosamine family, is a carcinogenic and mutagenic agent that has gained considerable research interest owing to its toxic nature.
Rehin Sulay   +3 more
doaj   +1 more source

NDMA Formation by Chloramination of Ranitidine: Kinetics and Mechanism [PDF]

open access: yesEnvironmental Science & Technology, 2012
The kinetics of decomposition of the pharmaceutical ranitidine (a major precursor of NDMA) during chloramination was investigated and some decomposition byproducts were identified by using high performance liquid chromatography coupled with mass spectrometry (HPLC-MS).
Le Roux, Julien   +4 more
openaire   +4 more sources

N‐nitrosodimethylamine‐Contaminated Valsartan and Risk of Cancer: A Nationwide Study of 1.4 Million Valsartan Users

open access: yesJournal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2022
Background Since July 2018, numerous lots of valsartan have been found to be contaminated with N‐nitrosodimethylamine (NDMA). We aimed to assess the association between exposure to valsartan products contaminated with NDMA and the risk of cancer. Methods
Imène Mansouri   +4 more
doaj   +1 more source

Involvement of PSMD10, CDK4, and Tumor Suppressors in Development of Intrahepatic Cholangiocarcinoma of Syrian Golden Hamsters Induced by Clonorchis sinensis and N-Nitrosodimethylamine. [PDF]

open access: yesPLoS Neglected Tropical Diseases, 2015
Clonorchis sinensis is a group-I bio-carcinogen for cholangiocarcinoma (CCA). Although the epidemiological evidence links clonorchiasis and CCA, the underlying molecular mechanism involved in this process is poorly understood.
Md Hafiz Uddin   +4 more
doaj   +1 more source

Syringic and ascorbic acids prevent NDMA-induced pulmonary fibrogenesis, inflammation, apoptosis, and oxidative stress through the regulation of PI3K-Akt/PKB-mTOR-PTEN signaling pathway

open access: yesMetabolism Open, 2022
Idiopathic lung fibrosis (ILF) is a severe and life threatening lung disorder that is characterized by scarring of lung tissue, leading to thickening and stiffening of affected areas.
Oluwatobi T. Somade   +9 more
doaj   +1 more source

N-Nitrosodimethylamine Contamination in the Metformin Finished Products

open access: yesMolecules, 2020
A GC–MS/MS method with EI ionization was developed and validated to detect and quantify N-nitrosodimethylamine (NDMA) and seven other nitrosamines in 105 samples of metformin tablets from 13 different manufactures.
Adam Zmysłowski   +2 more
doaj   +1 more source

N-Nitrosodimethylamine (NDMA) Formation from Ranitidine Impurities: Possible Root Causes of the Presence of NDMA in Ranitidine Hydrochloride.

open access: yesChemical & pharmaceutical bulletin, 2021
N-Nitrosodimethylamine (NDMA) is a probable human carcinogen. This study investigated the root cause of the presence of NDMA in ranitidine hydrochloride. Forced thermal degradation studies of ranitidine hydrochloride and its inherent impurities (Imps. A, B, C, D, E, F, G, H, I, J, and K) listed in the European and United States Pharmacopeias revealed ...
Yokoo, Hidetomo   +8 more
openaire   +2 more sources

Development and Validation of a Method for the Semi-Quantitative Determination of N-Nitrosamines in Active Pharmaceutical Ingredient Enalapril Maleate by Means of Derivatisation and Detection by HPLC with Fluorimetric Detector

open access: yesApplied Sciences, 2021
A novel HPLC method with fluorimetric detection was developed for the determination of potentially carcinogenic N-nitrosodimethylamine (NDMA) and N-nitrosodiethylamine (NDEA) in active pharmaceutical ingredient enalapril maleate.
Dariusz Boczar   +4 more
doaj   +1 more source

Unveiling O3 and HO· role on NDMA degradation mechanism in the atmosphere: A combined theoretical and experimental study

open access: yesResults in Chemistry
N-nitrosodimethylamine (NDMA), a highly potent carcinogen, poses significant pollution concerns in the atmosphere. The experimental methods and density functional theory (DFT) methods are employed herein to unveil the role of O3 and HO·role on the NDMA ...
Dan Huang   +6 more
doaj   +1 more source

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