introduction: response to morphine and role of nitric oxide (no) on expression of morphine response has been studied in vertebrates. but, little evidence is provided in the matter in earlier invertebrates. this investigation for the first time evaluated the effect of no on expression of morphine potency in paramecium caudatum. methods: animal after isolation from natural media and specific iden...

vaccination against mumps is included in world health organization (who) program of global immunization. safety and efficacy of vaccines must be confirmed by control units in charge of public health. in iran, the secondary control on potency of vaccine has not been set up yet. we decided to overcome this problem by developing who and nibsc methods in food and drug control lab. ‎nine dilutions o...

The inhalation cancer potency of benzene was estimated from observations of leukemia among U.S. rubber hydrochloride workers exposed to benzene (Pliofilm Cohort) (Rinsky et al., 1987; Paxton et al., 1994) and benzene-exposed workers from various industries in China (Chinese Worker Cohort) (Hayes et al., 1997). In estimating potency, observations were assumed to follow a Poisson distribution. Re...

     Thimerosal, which is approximately 50% mercury by weight is a preservative widely used in vaccines since the 1930’s. It meets the requirements for a preservative as set forth by Pharmacopeia challenge test and has been shown to be effective against a broad spectrum of pathogens. In July 1999, the Public Health Service agencies and vaccine manufacturers agreed that thimerosal should be redu...

Nineteen linkage groups containing a total of 52 markers have been identified in the sheep genome after typing large paternal half-sib families. The linkage groups range in size from 2 markers showing no recombination to a group containing 6 markers covering approximately 30 cM of the sheep genome. Thirteen of the groups have been assigned to a sheep chromosome. Three groups contain markers fro...

The cannabinoid and serotonin systems modulate feeding behavior in humans and laboratory animals. The present study assessed whether a cannabinoid (CB)(1) receptor antagonist and a serotonin (5-HT)(2C) receptor agonist alone and in combination attenuate motivation for the liquid nutritional drink Ensure as measured by a progressive ratio (PR) schedule of reinforcement in male C57BL/6 mice. Pret...

The high-resolution spectrum of water vapor between 13 200 and 16 500 cm-1 recorded by J.-Y. Mandin, J-P. Chevillard, C. Camy-Peyret, J.-M. Flaud, and J. W. Brault (1986. J. Molec. Spectrosc., 116, 167) is analyzed using high-accuracy linelists obtained using ab initio calculations and spectroscopically determined potential. Assignments to H216O transitions are presented for 663 of the 795 unas...

We consider the problem of assigning flights to airport gates. We examine the general case in which an aircraft serving a flight may be assigned to different gates for arrival and departure processing and for optional intermediate parking. Restrictions to this assignment include gate closures and shadow restrictions, i. e. the situation where certain gate assignments may cause blocking of neigh...

One of the basic problems in the standardization of inactivated polyvalent influenza virus vaccines has been the determination of the relative potency of the individual strain components. The chicken cell agglutination test measures reliably the total hemagglutinin content of these vaccines. With immunodiffusion techniques, it is now possible to quantitate each strain component of polyvalent va...

Aminoamide local anesthetics induce vasoconstriction in vivo and in vitro. The goals of this in vitro study were to investigate the potency of local anesthetic-induced vasoconstriction and to identify the physicochemical property (octanol/buffer partition coefficient, pKa, molecular weight, or potency) of local anesthetics that determines their potency in inducing isolated rat aortic ring contr...