background: endometrial development has an important role in blastocyst adhesion and implantation. during ivf cycles, endometrial development is enhanced by progesterone. objective: the aim of this study was to compare ultrastructural and morphometrical characteristics of mice uterine endometrium in natural cycle with those in superovulated cycles received progesterone or sildenafil. materials ...

background: repeated implantation failure (rif) is one of the most intricate obstacles in assisted reproduction. the cytokine and chemokine composition of uterine cavity seem to play important roles in the implantation process. objective: to compare the cytokine profile in the endometrium of normal fertile women and those with repeated implantation failure. methods: after enzymatic digestion of...

introduction: meningioma is a benign and slowly-growing tumor that is responsible for 20% of brain neoplasms. it can be accompanied by some genetic disorders such as neurofibromatosis type 2 and is more common among women. as a space occupying lesion, it produces a wide range of signs and symptoms by compressing the adjacent and underlying tissues in the brain. trauma and viruses are possible e...

Intermediate band silicon solar cells have been fabricated by Titanium ion implantation and laser annealing. A two-layer heterogeneous system, formed by the implanted layer and by the unimplanted substrate is obtained. In this work we present electrical characterization results which evidence the formation of the intermediate band on silicon when ion implantation dose is beyond the Mott limit. ...

We report an experimental and simulation study for introducing dopant ions into (100) germanium in the energy range from 5 to 40 keV. The successful calibration of our Monte Carlo ion implantation simulator for amorphous and crystalline Ge targets is demonstrated by comparison of predicted boron profiles with SIMS data. The implantation profile in Ge is shallower than in Si for a given energy d...

An inductively heated hot cavity catcher has been constructed for the production of low-energy ion beams of exotic, neutron-deficient Ag isotopes. A proof-of-principle experiment has been realized by implanting primary (107)Ag(21+) ions from a heavy-ion cyclotron into a graphite catcher. A variable-thickness nickel foil was used to degrade the energy of the primary beam in order to mimic the im...

The global distribution of surficial hydroxyl on the Moon is hypothesized to be derived from implantation solar wind protons. As traverses geomagnetic tail, it generally shielded wind; therefore, concentration hydrogen expected decrease during full Moon. A Monte Carlo approach used model diffusion implanted atoms in regolith as they form metastable bonds with O atoms, and subsequent degassing H...

accurate delivery of torque to implant screws is critical to generate ideal preload in the screw joint and to offer protection against screw loosening. mechanical torque-limiting devices (mtlds) are available for this reason. in this study, the accuracy of one type of friction-style and two types of spring-style mtlds at baseline, following fatigue conditions and sterilization processes were de...

conclusions this study revealed that the type of hearing loss, presence in the rehabilitation program, and the age of cochlear implantation can be major prognostic factors of the response to the treatment, then the country’s health policy makers and health planners must executively take into account the infants’ hearing screening program during the first 6 month of age. results the mean and the...