The development of contact hypersensitivity to temporary tattoos has been on an increase all over the world. Skin painting with henna is a traditional practice in the Moslems and Hindu, and has recently been increasingly used in western countries. Black henna is obtained by adding paraphenylenediamine to the natural occurring henna. The risk of sensitization increases with the length of contact...

The intertidal snail Littorina saxatilis has repeatedly evolved two parallel ecotypes assumed to be wave adapted and predatory shore crab adapted, but the magnitude and targets of predator-driven selection are unknown. In Spain, a small, wave ecotype with a large aperture from the lower shore and a large, thick-shelled crab ecotype from the upper shore meet in the mid-shore and show partial siz...

Tracheotomy is one of the oldest surgical procedures, and it is a life-saving procedure to overcome upper airway obstructions. While congenital causes play an important role in pediatric tracheotomy indications, upper airway edema and obstruction due to anaphylaxis rarely require tracheotomy. Allergy can cause life-threatening acute edema by anaphylactic reactions in the respiratory tract. Henn...

Allergic contact dermatitis from nonpermanent black henna tattoos has been frequently reported, particularly in children. Contamination or adulteration of the dyes with para-phenylendiamine has been identified as major cause of active sensitization and elicitation of severe allergic contact dermatitis. Sequelae include permanent sensitization, hyper- or hypopigmentation, scarring, keloids, and ...

Traditional henna rarely causes adverse events. However, to obtain a black color, many ingredients are mixed with this plant such as paraphenylene diamine and solvents. The aim of our study is to describe severe cutaneous adverse events caused by black henna collected at the Moroccan Pharmacovigilance Centre. Materials and Methods: We analyzed the coetaneous adverse reactions associated with th...

Background and objectives: Persian scholars such as Avicenna and Zakariya al-Razi have pointed out many uses for henna oil. The present study aimed to propose a method for standardization of this oil. Methods: The luteolin content has been evaluated quantitively by HPTLC method to standardize the henna oil. The oil sample was applied on silicagel plate and the ...

Henna plant (Lawsonia inermis) is an Indian medicinal plant used in traditional medicine for the treatment of various diseases, besides its popularity as a natural dye to colour hand and hair. Research in the recent past has accumulated enormous evidence revealing henna plant to be an excellent source of antioxidants such as total phenolics. In this study, the extraction of total phenolics from...