abstract : alumina (al 2 o 3 ) is one of the most practical ceramics used in making ceramic-metal armours. to improve the properties of alumina, some other materials are added to it. in this paper, sic material as nano powder is added to alumina, and four armour samples of this new ceramic with different volume fractions (v.f. ) including 0%, 5%, 10% and 15% of sic particles are made. then, the...

0001 The 1980s were not kind to African elephants. Poachers committed brutal acts in the pursuit of tusks to feed the human hunger for ivory. Gruesome images of the carnage they left behind—mutilated corpses sprawled in twisted repose, attended by bereft companions and bewildered orphans— helped document the precipitous collapse of Africa’s elephant populations. Between 1970 and 1989, as global...

Coffin-Siris syndrome (OMIM#135900) is a multiple congenital anomaly syndrome classically characterized by hypo- or aplasia of the fifth digit nails or phalanges, as well as coarse facial features, sparse scalp hair, and moderate to severe cognitive and/or developmental delay. The recent identification of molecular etiologies has served to effectively characterize a large set of patients who ha...

Introduction: To achieve acceptable clinical performance, a ceramic veneer must be bonded to enamel by well-polymerized resin cement. Among different factors, thickness and translucency of the ceramic may affect the resin cement polymerization. Thus, the current study evaluated the effect of the thickness and translucency of lithium disilicate ceramic on light-cured resin cement bond strength t...

A case of asthma is reported that was due to ivory from the tusk of the elephant, a cause of occupational asthma unique to Africa.

The United Kingdom, with the introduction of Ivory Act 2018, is at forefront elephant protection, and it hoped that governmental commitments, made in 25 Year Environment Plan, will see increased protection for other species risk due to illegal wildlife trade. However, one currently falls outside regulation Convention on International Trade Endangered Species Wild Fauna Flora (CITES) can be dire...