Vapochromic wool fibers for hazardous ammonia detection using xanthohumol biomolecule from natural extract of common hop (Humulus lupulus L.).

Ammonia is a colorless gas, yet it can be fatal if inhaled or ingested in high enough concentrations. Herein, a solid-state colorimetric smart wool (WL) sensor for ammonia was developed. Common hop (Humulus lupulus L.

Nasal endoscopic assessment of failure after external dacryocystorhinostomy.

Purpose: To study intranasal causes of failure of external dacryocystorhinostomy (DCR).

Design: A retrospective study of clinical data from transnasal endoscopic findings after failure of external DCR.

Methods: Assessment of 65 patients with failure after external dacryocystorhinostomy; subjectively by patient's symptoms and saccharine test and objectively by patency on syringing, functional endoscopic dye test and endonasal endoscopic assessment.

Egyptian genotyping of Giardia lamblia.

Out of 105 patients infected with Giardia, 38 patients have Genotype I (36.19%), 13 have Genotype II (12.38%), 10 have Genotype III (9.