الوسم: الاسلوك

تنزيل وتحميل كتاِب الاسلوك المهني والأمان برابط مباشر مجاناً وصف الاسلوك المهني والأمان Platelet-rich fibrin (PRF) substance is a by-product of blood (plasma) that is rich in platelets. PRF, in short, is simply a byproduct of blood. It is exceptionally high in platelets and growth factors, the “signaling” molecules that allow communication between cells. PRF […]