1. The equilibrium relationship between acetylcholine (ACh) concentration and response (fraction of channels open), corrected for the effects of desensitization, has been estimated by single-ion-channel recording at the adult frog skeletal neuromuscular junction. At high ACh concentration channel openings occur in well-defined clusters separated by long desensitized intervals. The response, po,...

In this research attempts were made to estimate the in-situ stresses acting on a hydrocarbon reservoir based on routine activities of acid injection in oil reservoir. It was found that the relation between the re-opening pressure of fracture and principal in-situ stresses can be estimated using rock mechanics equations for the circular underground cavities. An appropriate relation between the m...

artemisia annua is a medicinal annual herb that widely distributed in asia, europ, north america, and also is grown in north reagions of iran. in this study, variation in the quantity and quality of the essential oil of a.annua apical shoots at different developmental stages including vegetative, early flower opening and full flowering stages is reported. the obtained oils by hydrodistilation o...

The stable structural conformations that occur along the complete reaction coordinate for ion channel opening have never been observed. In this study, we describe the equilibrium ensemble of structures of Slo2.2, a neuronal Na+-activated K+ channel, as a function of the Na+ concentration. We find that Slo2.2 exists in multiple closed conformations whose relative occupancies are independent of N...

Long titanium aneurysm clips have recently been released. In the present study, comparative study of long titanium and cobalt alloy clips was performed. Two kinds of Sugita long clips (straight clips of 25- and 35-mm blade length) made of titanium and cobalt alloys were tested by measuring the closing force, the anti-scissoring torque, and the maximum opening width. There were some differences ...

This study investigates jaw-finger coordination in a task consisting in pointing to a target while naming it with a /pata/ or a /tapa/ utterance stressed either on the first ('CVCV) or on the second (CV'CV) syllable. Optotrack measurements of jaw and finger displacements show that for 'CVCV names, the moment at with the finger reaches the target alignment is synchronized with the maximum of the...

The long-term purpose of this study is to determine whether there are “visual” cues to prosody. An audiovisual corpus was recorded from a male native French speaker. The sentences had a subject-verb-object (SVO) syntactic structure. Four conditions were studied: focus on each phrase (S,V,O) and no focus. Normal and reiterant modes were recorded. We first measured F0, duration and intensity to v...

The prevalence of signs and symptoms related to TM (temporomandibular) disorders was examined in 40 children with primary dentition and in 40 children with mixed dentition. The purpose of this study was to evaluate the relationship between dentition and TM disorders in the examined population. Maximum mouth opening was also evaluated. Clinical examination was done by one investigator. A questio...

abstract introduction. temporo-mandibular disorders (tmds) are a group of chronic and common disease that a lot of skeletal, dental and psychologic factors can have an effect on it. proposed treatment to control this disorder consists of wide variety of drugs and non-drugs methods beside dental treatment. some investigations have reffered to relation between tmds and some psychologic factors su...