there has been extensive work on the existence of periodic solutions for nonlinear second order autonomous differantial equations, but little work regarding the third order problems. the popular poincare-bendixon theorem applies well to the former but not the latter (see [2] and [3]). we give a necessary condition for the existence of periodic solutions for the third order autonomous systems, t...

In Europe, about 55% of concrete bridges are 50 years old and require non-structural rapid repair strategies to reinstate the aesthetic durability performances. Existing focus primarily on superficial restoration that continues demonstrate premature deterioration due inevitable micro-crack formations further propagate macro-cracks leading ingress moisture along with harmful ions. this study, be...

In this paper we study Multiple periodic solutions for a class of non-autonomous and convex Hamiltonian systems and we investigate use some properties of Ekeland index.  

conclusions the crude hydroalcoholic extract of burdock root was found to cause better outcomes in the healing process, acute inflammation, and fibrosis on the 7th, 14th, and 21st day postoperatively. objectives in this experimental study, 36 male wistar rats each weighting approximately 200 - 220 g were studied in six groups, each with 6 animals for 21 days. hydroalcoholic extract of burdock r...

conclusions epo injection into the site of tibiofibular fractures may possibly accelerate healing. background erythropoietin (epo), in addition to its function as an erythropoiesis regulator has a regenerative activity on some nonhematopoietic tissues. animal studies have suggested a role for erythropoietin in bone healing. objectives the present study aimed to evaluate the effects of local epo...

sulfated polysaccharides have shown promising effects on wound healing processes along with many other biological activities. the sulfated polysaccharides extracted from two algae species habitats in persian gulf were studied in vivo for their effects on collagen formation and epidermal regeneration. the polysaccharides were purified from aqueous extracts of p. tetrastromatica and p. boergeseni...

background burns are still considered one of the most devastating conditions in emergency medicine affecting both genders and all age groups in developed and developing countries, resulting into physical and psychological scars and cause chronic disabilities. this study was performed to determine the healing effect of curcumin on burn wounds in rat. methods seventy female sprague-dawley 180-220...

wound healing has always been among important and crucial subjects in medicine. morphine dependency has also been a social and health problem in the middle east. this study was aimed to investigate the effects of morphine dependency on pro-inflammatory and fibroblast cell recruitment, as well as re-epithelialization and the revascularization processes involved in secondary intention wound heali...

Encapsulated healing agents is a promising solution for extending the service life of critical infrastructure, providing long-term efficiency. This research focuses on shell properties cement-based spherical macro-capsules, aiming to achieve increased survivability during mixing mortar mixtures and efficient triggering upon crack propagation. In this framework, pan coating technique was examine...