immature teeth have a large apical opening and thin divergent or parallel dentinal walls; hence, with conventional needle irrigation there is a very high possibility of extrusion. this study was done to compare the apical extrusion of naocl in an immature root delivered using endovac and needle irrigation.eighty freshly extracted maxillary central incisors were decoronated followed by access ca...

to evaluate the quality of services in hospitals can rely on mortality rate and side effects rate. according to performed studies, side effects rate is a better indicator to evaluate the quality of hospital services, therefore decreasing of side effects is one of the main objectives in hospital management. a side effect of open-heart surgery is the skin damage. some of iranian patients who were...

The trml mutation of Saccharomyces cerevisiae is a single nuclear mutation that affects a specific base modification of both cytoplasmic and mitochondrial tRNA. Transfer RNA isolated from trml cells lacks the modified base N2,N2-dimethylguanosine, and extracts from these cells do not have detectable N2,NZdimethylguanosine-specific tRNA methyltransferase activity. As part of our efforts to deter...

A large number of crystal structures of bacteriophage T4 lysozyme (T4-L) have shown that it contains two subdomains, which can arrange in a compact conformation (closed state) or, in mutants of T4-L, more extended structures (open state). In solution, wild-type T4-L displays only a single set of nuclear magnetic resonance (NMR) signals, masking any conformational heterogeneity. To probe the con...

Ingestion of ethanol results in a decreased level of plasma vasopressin, which appears to be caused by inhibition of arginine vasopressin (AVP) release from the neurohypophysis. Activation of membrane voltage-gated Ca2+ channels plays an important role in triggering this neurohormone release. In this article, single-channel recordings are used to demonstrate that ethanol, at concentrations cons...

We begin by descr ib ing the mode l under cons idera t ion . Let 5 0 = { ( m , n ) e 2 2 : m + n is even} and make 50 into a g raph by d rawing an or iented arc from each z ~ 5 ~ to z + (1, 1 ) and to z + ( 1, l ). Each arc, also called a bond, is independen t ly open with p robab i l i t y p and closed with p robab i l i t y 1 p. An open b o n d indicates that flow is a l lowed in the direct i...

the postharvest life of cut eustoma grandiflorum flowers is limited in open flowers. therefore a factorial experiment based on a completely randomized design with ascorbic acid (asa) at 4 levels (0, 100, 200, 300mg l-1) and citric acid (ca) at 3 levels (0, 100, 200 mg l-1) with 3 replications and 3 samples for each replications, was conducted for this purpose. results indicated that a significa...