Soft Ionic Electroactive Actuators with Tunable Non-Linear Angular Deformation Wangyujue Hong, Abdallah Almomani, Yuanfen Chen, Reihaneh Jamshidi, Reza Montazami 1 Department of Mechanical Engineering, Iowa State University, Ames IA 50011, USA 2 Department of Aerospace Engineering, Iowa State University, Ames IA 50011, USA 3 Ames Laboratory, Department of Energy, Ames, IA 50011, USA * Correspon...

Aims. We investigate the dependence of the luminosity-diameter relation of galaxies on the environment. Methods. This study is based on a comparison between the 80 galaxies in the Shapley-Ames Catalog that are located within a distance of 10 Mpc, and the luminosity-diameter relation for galaxies in great clusters such as Virgo and Coma. Results. A relatively tight linear correlation is observed...

This document reports on the activities carried out during a four-week visit of Roberto Cavada at the NASA Ames Research Center. The main goal was to test the practical applicability of the framework proposed by Pecheur and Cimatti, where a diagnosability problem is reduced to a Symbolic Model Checking problem.

A number of phthalate esters and related chemicals were tested for mutagenicity in Salmonella typhimurium. The chemicals were tested blind in three laboratories by a preincubation modification of the Ames Salmonella/mammalian microsome test using S-9 prepared from Aroclor-induced rats and Syrian hamsters. All chemicals tested were judged to be nonmutagenic.

David Hessel , Carolyn Lawrence , and Nick Lauter 1,2,3* 1 Interdepartmental Genetics Program, Iowa State University, Ames, IA, 50011, U.S.A. 2 Department of Plant Pathology, Iowa State University, Ames, IA, 50011, U.S.A 3 USDA-ARS Corn Insects and Crop Genetics Research, Ames, IA, 50011, U.S.A. 4 Department of Genetics, Development and Cell Biology, Iowa State University, Ames, IA, 50011, U.S....

BACKGROUND Crotalaria pallida Ailton is a plant belonging to the Fabaceae family, popularly known as "rattle or rattlesnake" and used in traditional medicine to treat swelling of the joints and as a vermifuge. Previous pharmacological studies have also reported anti-inflammatory, antimicrobial and antifungal activities. Nevertheless, scientific information regarding this species is scarce, and ...

Determination of mutagenic activity in bacterial systems has become accepted as an initial step in the evaluation of the carcinogenic potential of new chemicals. In this paper, a bacterial mutagen screening technique is described in which chemicals can be tested in 10 tester strains over a 10,000-fold concentration gradient both with and without metabolic activation. Using this assay, 855 chemi...

Identifying agents that have long-term deleterious impact on health but exhibit no immediate toxicity is of prime importance. It is well established that long-term toxicity of chemicals could be caused by their ability to generate changes in the DNA sequence through the process of mutagenesis. Several assays including the Ames test and its different modifications were developed to assess the mu...