A voltammetric method for determining N-nitrosodimethylamine in losartan and olmesartan drugs.

Recently, the National Health Surveillance Agency (ANVISA) of Brazil recalled several lots of sartan drugs due to the presence of N-nitrosodimethylamine (NDMA). NDMA is a highly potent carcinogenic contaminant that harms human health; therefore, the presence of NDMA in sartan drugs must be checked through appropriate analytical methods. This work successfully developed a new analytical method for determining NDMA without chemical pretreatment of losartan and olmesartan drug samples.

Septicemic omphalophlebitis by Streptococcus equi subsp. zooepidemicus in a southern right whale calf (Eubalaena australis).

Southern right whales (Eubalaena australis) are mysticete cetaceans commonly observed in the coastal waters of Brazil, particularly in Santa Catarina State. There is limited understanding of the causes of calf mortality in this species, particularly concerning infectious diseases. We report a case of omphalophlebitis caused by Streptococcus equi subsp.

Effects of photobiomodulation and bethanechol chloride treatment on salivary composition and flow rate in head and neck cancer patients undergoing radiotherapy: longitudinal interventional experimental clinical study.

Objective: To evaluate the efficacy of photobiomodulation therapy (PBMT) and bethanechol chloride (BC) on the quantity and quality of saliva in patients undergoing radiotherapy (RT) for head and neck cancer.

Methods: Saliva samples were collected from patients before and after RT, who were treated with PBMT or BC. Clinical parameters, including salivary flow rate (SFR), pH, xerostomia, and concentrations of macro and microelements in saliva, were assessed.

Artificial neural networks to estimate the sorption and desorption of the herbicide linuron in Brazilian soils.

Generally, herbicides used in Brazil follow manufacturer's recommendations, which often do not consider soil attributes. Statistical models that include the physicochemical properties of the soil involved in herbicide retention processes could enable greater precision in herbicide dose decision-making. This study evaluated the potential of artificial neural networks (ANNs) to predict the sorption and desorption of the herbicide linuron in Brazilian soils with different attributes.

Advanced practice nursing in Brazil: bibliometric analysis of dissertations and theses.

Objective: To analyze the scientific production on Advanced Practice Nursing based on dissertations and theses published in Brazil.

Method: A bibliometric study, with a descriptive approach based on documents, carried out in the Coordination for the Improvement of Higher Education Personnel Theses and Dissertations Bank, Scientific Electronic Library Online, Virtual Health Library, Latin American and Caribbean Literature in Health Sciences and institutional repositories, from October to November 2023.

Results: Of the 25 scientific productions identified, 16 are dissertations and nine are theses.