Enhancing the NMR signals of plant oil components using hyperpolarisation relayed proton exchange.

In this work, the limited sensitivity of magnetic resonance is addressed by using the hyperpolarisation method relayed signal amplification by reversible exchange (SABRE-Relay) to transfer latent magnetism from -hydrogen, a readily isolated spin isomer of hydrogen gas, to components of key plant oils such as citronellol, geraniol, and nerol. This is achieved relayed polarisation transfer in which an [Ir(H)(IMes)(NHR)]Cl type complex produces hyperpolarised NHR free in solution, before labile proton exchange between the hyperpolarisation carrier (NHR) and the OH-containing plant oil component generates enhanced NMR signals for the latter. Consequently, up to 200-fold H (0.

The Use of Antibiotics for the Prevention of Surgical Site Infections in Two Government Hospitals in Taif, Saudi Arabia: A Retrospective Study.

Background Surgical site infections (SSIs) are among the most common postoperative complications. To reduce the occurrence of surgical wound infections, suitable antimicrobials should be administered. Aim of the work This study investigated the prophylactic use of antibiotics to prevent SSIs, in terms of agents and/or combination preferences, and the adherence of surgeons to both national and international guidelines of surgical antibiotic prophylaxis in Taif city government hospitals.

Forensic insects attracted to human cadavers in a vehicular environment in Riyadh, Saudi Arabia.

Insect fauna attracted to cadavers at the crime scene can be identified and used to estimate the post-mortem interval (PMI). In the current study, insects associated with two human cadavers in a vehicular environment were collected and analysed. The first cadaver was found five days' post mortem in a garage.

Direct and indirect hyperpolarisation of amines using hydrogen.

Nuclear Magnetic Resonance (NMR) and Magnetic Resonance Imaging (MRI) are two widely used techniques for the study of molecules and materials. Hyperpolarisation methods, such as Signal Amplification By Reversible Exchange (SABRE), turn typically weak magnetic resonance responses into strong signals. In this article we detail how it is possible to hyperpolarise the H, C and N nuclei of a range of amines.

A survey on postanesthetic patient satisfaction in a university hospital.

Background And Objectives: Patient satisfaction after anesthesia is an important outcome of hospital care. The aim is to evaluate the postoperative patient satisfaction during the patient stay at King Khalid University Hospital in Riyadh, Saudi Arabia.

Patients And Methods: Three hundred and fifty-three patients who underwent surgery under general/regional anesthesia were surveyed.