Solubilization of Reactive Red 2 in the Mixed Micelles of Cetylpyridinium Chloride and TX-114.

Owing to their surface active properties, surfactants have numerous applications in different fields of life. In the present research work, the solubilization of reactive red 2 (RR2) has been studied in single and mixed micellar systems (MMS) using UV-visible spectroscopy and electrical conductivity measurements. The interaction of RR2 with ionic micelles of cetylpyridinium chloride (CPC) was investigated.

Real-Time Optical Monitoring of Endotracheal Tube Displacement.

Proper ventilation of a patient with an endotracheal tube (ETT) requires proper placement of the ETT. We present a sensitive, noninvasive, operator-free, and cost-effective optical sensor, called Opt-ETT, for the real-time assessment of ETT placement and alerting of the clinical care team should the ETT become displaced. The Opt-ETT uses a side-firing optical fiber, a near-infrared light-emitting diode, two photodetectors with an integrated amplifier, an Arduino board, and a computer loaded with a custom LabVIEW program to monitor the position of the endotracheal tube inside the windpipe.

Calcitonin negative medullary thyroid cancer in ectopic thyroid tissue: a rare diagnosis in an unusual location.

Medullary thyroid cancer is an aggressive form of thyroid cancer arising from parafollicular C cells. Calcitonin (CT) is a specific and sensitive biochemical marker which typically aids primary diagnosis and disease surveillance following treatment. There are rare cases of calcitonin negative medullary thyroid cancer (CNMTC) documented in the literature; however, to our knowledge, this case is the first report of CNMTC arising in ectopic thyroid tissue.

Terahertz spectroscopy of Bisphenol "A", "AF", "S", "E" and the interrelationship between their molecular vibrations.

Bisphenol "A" is a widespread environmental hormone. After the prohibition on the use of BPA in some applications, it is progressively replaced by its variants. However, these variants of Bisphenol "A" are also noxious.

Molecular vibrations of bisphenol "S" revealed by FTIR spectroscopy and their correlation with bisphenol "A" disclosed by principal component analysis.

Bisphenol "S" (BPS), a common replacement for bisphenol "A" (BPA) after its ban in food contact applications, is studied by Fourier transform infrared (FTIR) spectroscopy (400-6800  cm). Identified molecular vibrations are assigned based on density functional theory calculations. As BPS is suspected to be as toxic as BPA, principal component analysis is used to find possible correlations among their molecular vibrations.

Liposarcoma of the retropharyngeal space.

Liposarcoma is a common soft tissue malignancy that occurs infrequently in the head and neck. Liposarcoma of the retropharynx is exceptionally rare, only four cases being described in the literature. We present a case in which retropharyngeal liposarcoma occurred in a patient who had had multiple previous subcutaneous lipomas excised.

Noise exposure in orthopaedic practice: potential health risk.

Noise exposure is one of the major causes of permanent hearing loss in society. Exposure of health service staff to intense levels of noise in the workplace is a potential risk for the development of temporary and permanent hearing loss. In this prospective study, 18 members of the orthopaedic staff underwent hearing assessment by pure tone audiometry and speech discrimination prior to noise exposure at the workplace and immediately following cessation of work.