Possible meteoroid hazard to solid- propellant rocket motors

Meteoroid hazards to solid propellant rocket motor

Apparatus and method for control of a solid fueled rocket vehicle Patent

Solid propellant rocket vehicle thrust control method and apparatu

The effect of exposure to a desirable mate on the eating behaviour of single versus committed women according to restraint status: An evolutionary perspective.

The purpose of the study was to investigate an evolutionary model of eating disorders. More specifically, this study tested Riadh Abed\u27s Sexual Competition Theory of Eating Disorders (1998). This theory postulates that eating disorders arise through female intra-sexual competition for males. Specifically, females wish to present themselves as evolutionarily desirable to males (physically attractive, thin), causing some individuals to develop restrained eating patterns. This is important, as restraint is a precursor to disordered eating. Restraint refers to replacing internally regulated (hunger driven) eating with planned, cognitively determined eating or dietary restraint with the goal of weight loss or preventing weight gain. According to Abed\u27s model, single women who have not yet found a mate are expected to eat less. Furthermore, because restrained eaters are more weight schematic, single restrained women are expected to eat even less. The hypotheses put forward were that all females would eat less in the presence of a desirable than in the presence of an undesirable potential mate, single females would eat less than committed females, and restrained, single females will eat the least of all groups. A total of 130 undergraduate students were randomly assigned to be exposed to descriptions of either two evolutionarily desirable mates or two evolutionarily undesirable mates. Participants were asked to choose between the two different mates and were given a bowl of pre-counted, pre-weighed M&Ms to snack on during this procedure. Results revealed a two-way interaction where single women who were exposed to the evolutionarily desirable mate ate the least amount of M&Ms. Contrary to expectations, restrained eaters ate more than unrestrained eaters.Dept. of Psychology. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2004 .R63. Source: Masters Abstracts International, Volume: 43-03, page: 0990. Adviser: Josee L. Jarry. Thesis (M.A.)--University of Windsor (Canada), 2004

Psychometric properties of the Dutch version of the eating competence Satter Inventory (ecSI 2.0TM) in community adolescents

Eating competence can help adolescents navigate their food choices and attitudes toward eating in a healthy and balanced way. In the present study, we investigated the psychometric properties of the Dutch translation of the Eating Competence Satter Inventory 2.0TM (ecSI 2.0TM), which was developed to assess eating attitudes and behaviors. A sample of 900 Flemish adolescents completed the ecSI 2.0TM DUTCH and two self-report measures on eating disorder symptoms and identity functioning (i.e., confusion and synthesis). Confirmatory factor analysis confirmed the four-factor structure of the ecSI 2.0TM DUTCH, and the resulting four subscales (i.e., Eating Attitudes, Food Acceptance, Internal Regulation, and Contextual Skills) showed acceptable-to-excellent reliability (αs ranging from 0.69 to 0.91). The ecSI 2.0TM DUTCH also demonstrated scalar invariance across sex and age (<17 years, ≥17 years). Males reported significantly higher ecSI 2.0TM DUTCH scores than females on the four subscales and the total scale. The two age groups did not significantly differ on the ecSI 2.0TM DUTCH scales. Finally, scores on the ecSI 2.0TM DUTCH subscales showed non-significant or small negative correlations with adolescents’ Body Mass Index (BMI), large negative correlations with eating disorder symptoms and identity confusion, and large positive associations with identity synthesis. The Dutch translation of the ecSI 2.0TM is a valid and reliable instrument to assess eating competence skills in male and female adolescents

Old lineage on an old island : Pixibinthus, a new cricket genus endemic to New Caledonia shed light on gryllid diversification in a hotspot of biodiversity

Few studies have focused on the early colonization of New Caledonia by insects, after the re-emergence of the main island, 37 Myr ago. Here we investigate the mode and tempo of evolution of a new endemic cricket genus, Pixibinthus, recently discovered in southern New Caledonia. First we formally describe this new monotypic genus found exclusively in the open shrubby vegetation on metalliferous soils, named 'maquis minier', unique to New Caledonia. We then reconstruct a dated molecular phylogeny based on five mitochondrial and four nuclear loci in order to establish relationships of Pixibinthus within Eneopterinae crickets. Pixibinthus is recovered as thesister clade of the endemic genus Agnotecous, mostly rainforest-dwellers. Dating results show that the island colonization by their common ancestor occurred around 34.7 Myr, shortly after New Caledonia re-emergence. Pixibinthus and Agnotecous are then one of the oldest insect lineages documented so far for New Caledonia. This discovery highlights for the first time two clear-cut ecological specializations between sister clades, as Agnotecous is mainly found in rainforests with 19 species, whereas Pixibinthus is found in open habitats with a single documented species. The preference of Pixibinthus for open habitats and of Agnotecous for forest habitats nicely fits an acoustic specialization, either explained by differences in body size or in acoustic properties of their respective habitats. We hypothesize that landscape dynamics, linked to major past climatic events and recent change in fire regimes are possible causes for both present-day low diversity and rarity in genus Pixibinthus. The unique evolutionary history of this old New Caledonian lineage stresses the importance to increase our knowledge on the faunal biodiversity of 'maquis minier', in order to better understand the origin and past dynamics of New Caledonian biota

Structure of the Cytoplasmic Loop between Putative Helices II and III of the Mannitol Permease of Escherichia coli: A Tryptophan and 5-Fluorotryptophan Spectroscopy Study

In this work, four single tryptophan (Trp) mutants of the dimeric mannitol transporter of Escherichia coli, EIImtl, are characterized using Trp and 5-fluoroTrp (5-FTrp) fluorescence spectroscopy. The four positions, 97, 114, 126, and 133, are located in a region shown by recent studies to be involved in the mannitol translocation process. To spectroscopically distinguish between the Trp positions in each subunit of dimeric EIImtl, 5-FTrp was biosynthetically incorporated because of its much simpler photophysics compared to those of Trp. The steady-state and time-resolved fluorescence methodologies used point out that all four positions are in structured environments, both in the absence and in the presence of a saturating concentration of mannitol. The fluorescence decay of all 5-FTrp-containing mutants was highly homogeneous, suggesting similar microenvironments for both probes per dimer. However, Stern-Volmer quenching experiments using potassium iodide indicate different solvent accessibilities for the two probes at positions 97 and 133. A 5 Å two-dimensional (2D) projection map of the membrane-embedded IICmtl dimer showing 2-fold symmetry is available. The results of this work are in better agreement with a 7 Å projection map from a single 2D crystal on which no symmetry was imposed.