Chronic tobacco smoking and alcohol consumption are well-established risk factors for the
development of squamous cell carcinoma (SCC) of the head and neck. There are, however …

The habit of Catha edulis Forsk (khat) chewing has prevailed for centuries among
populations in the horn of Africa and the Arabian peninsula. Fresh leaves of Catha edulis …

Background: Stress is known to affect synaptic plasticity, dendritic morphology and induces
neurotoxic damage in humans, probably through generation of free radicals. Both ex vivo …

Background and aim: Stress as a cofactor has been reported to affect the progression and
severity of several diseases. The influence of stress on the liver is of interest from the clinical …

Ruta chalepensis L. is a versatile herb used in culinary arts and traditional medicine. The
study aimed to determine the chemical composition of an ethanolic extract from R …

Migrating birds often complete long non–stop flights during which body energy stores
exclusively support energetic demands. The metabolic correlates of such long–distance …

The antiamnesic effect of 3, 5‐dicaffeoylquinic acid (3, 5‐diCQA) as the main phenolic
compound in Artemisia argyi H. extract on cognitive dysfunction induced by trimethyltin …

Quercetin is a bioflavonoid abundant in onions, apples, tea and red wine and one of the
most studied flavonoids. Dietary quercetin intake is suggested to be health promoting, but …

This study was designed to investigate effect of alpha-lipoic acid (LA) on lipid peroxidation,
nitric oxide production and antioxidant systems in rats exposed to chronic restraint stress …

Khat chewing is deeply rooted in the every day life of people living in the Horn of Africa and
in South Arabia, where Catha edulis is endemic. Considered little more than an exotic habit …