Pyramid has been variously studied for its mystical preservative, healing and curative effects. The power of the pyramids has been much talked about in Egypt and the great pyramids as the wonders of the world. They are mentioned as çikhariëis and gopurams used in temples in Indian tradition. It is associated with Chakras and the elevation of the human mind to the super-consciousness levels. Alt...

PURPOSE To compare the ocular pulse amplitude (OPA) lowering effects of preservative-free tafluprost and dorzolamide-timolol fixed combination (DTFC) using dynamic contour tonometry. METHODS In total, 66 eyes of 66 patients with normal tension glaucoma (NTG) (n = 34) or primary open angle glaucoma (POAG) (n = 32) were included. Patients were divided into two groups: the preservative-free tafl...

PURPOSE Microbial contamination of different cosmetic preparations, as a result of preservative failure, presents a major public health threat. Also, most of the known preservatives have serious consumer side effects. The antimicrobial activity of zinc oxide nanoparticles (ZnO NP) is well documented. Therefore, we aimed to determine the possible use of unirradiated and γ-irradiated ZnO NP as a ...

Self-Assessment 1 7. Pigmented cosmetic dermatitis is associated historically with Japanese women using which chemical? A. Jasmine absolute B. Sandalwood oil C. Ylang-ylang oil D. All of the above E. None of the above 8. Which chemical is considered an endocannabinoid? A. Anandamide B. Dronabinol C. HU-210 D. Nabilone E. Tetrahydrocannabinol 9. Which cannabinoid has an “entourage” effect, augme...

For decades chromated copper arsenate (CCA) was the primary preservative for treated wood used in residential construction. However, recent label changes submitted by CCA registrants will withdraw CCA from most residential applications. This action has increased interest in arsenic-free preservative systems that have been standardized by the American Wood Preservers’ Association. These include ...

PURPOSE To assess the effect of preservative-free dorzolamide-timolol on nonvisual symptoms and intraocular pressure (IOP) in newly diagnosed and untreated patients with open-angle glaucoma or ocular hypertension. METHODS This was a prospective, 8-week, open-label, Canadian multicenter study. All patients were treated with preservative-free dorzolamide-timolol formulation. The primary outcome...

PURPOSE To investigate in vitro whether eye toxicity is attributable to the preservative or the fluoroquinolone used in ophthalmic formulations. METHODS Corneal and conjunctival cell lines were incubated with preserved (benzalkonium chloride [BAC]) or unpreserved ofloxacin solutions for 15 minutes. Several concentrations of BAC were also tested (0.0025%-0.01%). Membrane integrity, reactive ox...

Oil spills in oceans cause irreparable damage to marine life and harm the coastal populations of affected areas. It is therefore fundamental to develop treatment strategies for such spills. Currently, chemical dispersants have been used during oil spills, although these agents have been increasingly restricted due to their toxic potential. Thus, the aim of the present study was to formulate a b...

The value of blood, as contrasted with that of plasma or of plasma products, lies chiefly in the ability of its erythrocytes to perform their oxygencarrying function in the circulation of the recipient, the r6le of the other formed elements being considered relatively unimportant. Studies on the storage of whole blood therefore are primarily concerned with the problem of optimal preservation of...

In vitro cytotoxicity of tafluprost, which is the most recently developed anti-glaucoma prostaglandin (PG) analog, in ocular surface cells is addressed in comparison with other PG analogs. Irrespective of cell lines and models, the cytotoxicity of anti-glaucoma PG eyedrops was primarily related to the concentration of benzalkonium chloride (BAK) contained in the eyedrops as a preservative. Acco...