The hot gases produced by the internal combustion engines passes through the exhaust valve and causes high temperatures in the exhaust valve and its seat. To avoid damaging the exhaust valve, heat must be transferred from the valve to its seat during the contact they make at the opening and closing cycle. Heat transfer rate from the exhaust valve to its seat is a function of many factors. One o...

Traditional contact tracing relies on knowledge of the interpersonal network of physical interactions, where contagious outbreaks propagate. However, due to privacy constraints and noisy data assimilation, this network is generally difficult to reconstruct accurately. Communication traces obtained by mobile phones are known to be good proxies for the physical interaction network, and they may p...

Results Seven of the 41 patients had positive reactions to textile related allergens on the screening or textile series and five were thought to be work-related. Four patients who were patch test positive with the textile series were also positive to relevant allergens on the screening series. Two patients with work-related textile dermatitis were patch test positive to the textile series but n...

Beauticians are recognized as being at risk regarding the development of occupational skin diseases, mainly allergic contact dermatitis, with acrylates and methyisothiazolinones being the most frequently found occupational allergens (1–4). Little is known about behaviour at work regarding safety and the prevalence of skin symptoms in beautician apprentices. This article describes skin protectiv...

introduction cement has a wide industrial usage and it is the leading cause of occupational skin diseases among construction workers, which are present as contact urticarial and contact dermatitis. case presentation a 79-year-old water sewage worker man referred to our department with numerous symmetric hyper-keratotic papules with an erythematous base on both hands and feet for about 20 years....

background: free-living amoebae (fla) including acanthamoeba spp. and hartmannella spp. are the causative agents of serious corneal infection especially within contact lens wearers. thus contact lenses and their storage case could be a suitable niche for potentially pathogenic amoebae. the main objective of the present study was to evaluate the contamination of contact lenses to free living amo...

Epicutaneous patch testing is the gold standard method for the diagnosis of allergic contact dermatitis. Despite this knowledge, many clinical dermatologists do not offer patch testing in their offices or offer testing with only a limited number of allergens. Introduced in 1995, the Thin-Layer Rapid Use Epicutaneous Test originally contained 23 allergens and one control. In 2007, five additiona...

An 8-year-old girl attended a Halloween party (Fig. 1) where her facewas decoratedwith a colourmake-up pencil. On removing the make-up, she developed erythematous, scaly, itchy patches on the cheeks and perioral area. Hermother applied argan oil on the lesions for some days, which causedaworseningof the rash. Thegirlwas treated in our department with methylprednisolone aceponate cream. Use of t...

We reported a case of allergic contact dermatitis three weeks after the H1N1 vaccine, probably involving thimerosal additive. Patients should be aware of this possible unusual delayed reaction.