this study focused on investigating the impact of keeping oral dialogue journals on efl learners’ oral fluency. sixty participants were ed out of 80 undergraduate freshmen who were studying english translation at sanandaj islamic azad university and pre-intermediate students at passargadeh jam language school based on their scores on a piloted proficiency test. they were then randomly divided i...

glaucoma is the leading cause of preventable blindness worldwide. despite tremendous advances in medical and surgical management of glaucoma in the recent years, the prevalence of glaucoma related blindness is anticipated to increase in the future decades because of the aging population. stem cells have the potential to change the glaucoma management in several ways. there are several areas of ...

there is great interest worldwide in discovering and developing a permanent source of tissues which would be capable of generating any cell type and which would avoid the problem of transplant rejection. stem cells are cells that can specialize into the many different cells found in the human body. the ethical objections concerning stem cells have focused primarily on their source. human embryo...

regenerative capacity of mammals is limited and can rarely regenerate a specific organ or tissue fully. due to these limitations, regenerative medicine seeks efficient and safe cell sources for regeneration of damaged tissues and organs or treatment for incurable diseases. human embryonic stem cells (hescs) hold two important properties called self renewal and pluripotency. however, the use of ...

tissue engineering is based on three main factors including scaffolds, cells and growth factors. natural scaffolds derived from decellularized tissues and organs have been successfully used in tissue engineering. decellularization studies have shown that natural scaffolds which maintaine their main structure and properties could be a suitable tool for studying cellular behaviors and preparation...

introduction: mesenchymal stem cells (mscs) hold great promise in the field of regenerative medicine.although originally isolated from bone marrow, mscs have since been obtained from a variety of adult and neonatal tissues including the adipose tissue. stemness and multipotential features of mesenchymal stem cells (msc) has been highlighted in many studies but there are many dark aspects in exc...

introduction: the thalassamias refer to a diverse group of hemoglobin disorders characterized by a reduced synthesis of  one or more of globin chains (α,β, γ, δβ,γδβ, δ and εγδβ).the main cure available today for thalassamia is bone marrow transplantation (bmt)  from compatible donor.on december 3, 1981 a 14-month-old child with β-thalassemia major recieved bmt from his hla-identical sister in ...

introduction: vesicovaginal fistula remains a challenge in surgical therapy. in this study autologous platelet rich plasma and platelet rich fibrin glue were used as a minimally invasive approach for vesicovaginal fistula closure. materials and methods: data including age, parity, iciq-ui (international consultation on incontinence questionnaire-urinary incontinence), iciq-qol (international co...

within a single tumor clone, cells have significantly different abilities to proliferate and form new tumors. this has led to the hypothesis that most cells in a cancer have a limited ability to divide and only a small subset of distinct cells, the cancer stem cells (cscs), has the capacity to self-renew and form new tumors . it has been proposed that the development of tumors is based exclusiv...

stem cells are undifferentiated self regenerating multi potential cells. there are three types of stem cells categories by the ability to form after cells and correlated with the body’s development process. totipotent: these stem cells can form an entire organism such as fertilized egg. ploripotent: ploripotent cells are those that can form any cell in the body but cannot form an entire organis...