30 research outputs found
A practical method for almond cultivar identification and parental analysis using simple sequence repeat markers
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Genetic analysis of interactions between the plant hormones auxin and ethylene
Auxin and ethylene regulate many important aspects of plant growth and development and are
essential to the plants survival. They help regulate such diverse processes as cell elongation,
growth of adventitious roots, fruit growth, germination, and a variety of other processes. Few
studies have examined how the hormones auxin and ethylene interact. An attempt to understand
how these two hormones interact is presented. To try and observe and interaction, two mutants,
diageotropica (dgt) and Never Ripe (Nr), both near isolines of the tomato (Lycopersicon
esculentum) parent Alisa Craig (AC). dgt is an auxin insensitive, single gene, recessive mutant.
Nr is a semi-dominant mutation in the AC background as characterized by its fruit phenotype in
which some fruit ripens and others remain orange. Nr has a mutation in an ethylene receptor
(ETR3) but it is not impaired in its ethylene biosynthesis capabilities, only its ability to perceive
ethylene. These two mutants (dgt and Nr) were cross-pollinated using standard pollination
techniques to generate an Fl population. The Fl was backcrossed to homozygous dgt plants to
obtain an F2 population. The four resultant populations (double mutant phenotype, dgt
phenotype, Nrphenotype, and WT phenotype) each have a 25% change for being observed. For
each cross completed, a reciprocal was also conducted. To try and characterize an interaction at
the seedling level, WT, Nr, dgt, F1, and F2 seed were gravistimulated under red light and the
curvature of growth was measured. In addition the number of lateral roots present was counted.
The F2 had a significant proportion of seedlings lacking lateral roots, so the F2 populations were
segregated based on the presence or absence of lateral roots. The Fl population, which was
expected to have a gravitropic response similar to Nr, exhibited an intermediate response, while
all F2 populations, regardless of lateral root presence, had responses similar to dgt. It was found
that dgt may have be semi-dominant because the F1 response was lower than that of the expected
and the all the F2 populations exhibited a similar response to gravity. Nr may also help to
partially repair the dgt lesion in the FI as indicated by the intermediate response
Selected Problems in the Direction of Investment in the Economic Development of Underdeveloped Countries
228 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1957.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD
The effect of subjective normative social images of smokers on children's intentions to smoke
Predictors of the development of elementary-school children's intentions to smoke cigarettes: Hostility, prototypes, and subjective norms
Smokeless Tobacco Cessation in Military Personnel: A Randomized Controlled Trial
Introduction Military personnel are twice as likely as civilians to use smokeless tobacco (ST). This study evaluated the efficacy of a minimal-contact ST cessation program in military personnel. Methods Participants were recruited from 24 military dental clinics across the United States during annual dental examinations. Participants were 785 active-duty military personnel who were randomly assigned to receive a minimal-contact behavioral treatment (n = 392) or usual care (n = 393). The behavioral treatment included an ST cessation manual, a videotape cessation guide tailored for military personnel, and three 15-min telephone counseling sessions using motivational interviewing methods. Usual care consisted of standard procedures that are part of the annual dental examination, including recommendations to quit using ST and referral to extant local tobacco cessation programs. Participants were assessed at 3 and 6 months after enrollment. Results Participants in the ST cessation program were significantly more likely to be abstinent from all tobacco, as assessed by repeated point prevalence at both 3 and 6 months (25.0%), and were significantly more likely to be abstinent from ST use for 6 months, as assessed by prolonged abstinence (16.8%), compared with participants in usual care (7.6% and 6.4%, respectively). Discussion These results indicate that a minimal-contact behavioral treatment can significantly reduce ST use in military personnel and has the potential for widespread dissemination. If ST users were identified in dental visits and routinely referred to telephone counseling, this could have a substantial benefit for the health and well-being of military personnel
Smokeless Tobacco Cessation in Military Personnel: A Randomized Controlled Trial
Introduction Military personnel are twice as likely as civilians to use smokeless tobacco (ST). This study evaluated the efficacy of a minimal-contact ST cessation program in military personnel. Methods Participants were recruited from 24 military dental clinics across the United States during annual dental examinations. Participants were 785 active-duty military personnel who were randomly assigned to receive a minimal-contact behavioral treatment (n = 392) or usual care (n = 393). The behavioral treatment included an ST cessation manual, a videotape cessation guide tailored for military personnel, and three 15-min telephone counseling sessions using motivational interviewing methods. Usual care consisted of standard procedures that are part of the annual dental examination, including recommendations to quit using ST and referral to extant local tobacco cessation programs. Participants were assessed at 3 and 6 months after enrollment. Results Participants in the ST cessation program were significantly more likely to be abstinent from all tobacco, as assessed by repeated point prevalence at both 3 and 6 months (25.0%), and were significantly more likely to be abstinent from ST use for 6 months, as assessed by prolonged abstinence (16.8%), compared with participants in usual care (7.6% and 6.4%, respectively). Discussion These results indicate that a minimal-contact behavioral treatment can significantly reduce ST use in military personnel and has the potential for widespread dissemination. If ST users were identified in dental visits and routinely referred to telephone counseling, this could have a substantial benefit for the health and well-being of military personnel