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Title: The establishment and study of two elasmobranch cell lines.
Creator: Poyer, James Christopher., Florida Atlantic University, Hartmann, James X.
Abstract/Description: The present study describes the first cell lines produced from members of class Chondrichthyes. Explants of brain tissue from Carcharhinus falciformis (silky shark) and Ginglymostoma cirratum (nurse shark) were incubated in a mammalian medium modified with the addition of urea, trimethylamine N-oxide, NaCl, and bovine serum. Primary monolayers were passaged with 0.025% trypsin in a modified saline solution. Silky shark cells grew optimally at 29C. The population doubling time for C....
Show moreThe present study describes the first cell lines produced from members of class Chondrichthyes. Explants of brain tissue from Carcharhinus falciformis (silky shark) and Ginglymostoma cirratum (nurse shark) were incubated in a mammalian medium modified with the addition of urea, trimethylamine N-oxide, NaCl, and bovine serum. Primary monolayers were passaged with 0.025% trypsin in a modified saline solution. Silky shark cells grew optimally at 29C. The population doubling time for C. falciformis cells at passage 29 was 67 hours. For G. cirratum cells at passage 6 the population doubling was 84 hours. Silky shark cells grew over a broad range of osmolalities from 315 mOsm to a 1664 mOsm with optimal growth at 650 mOsm. A medium containing 10% dimethylsulfoxide allowed for cryopreservation with greater than 65% viability upon recovery. Current theories of elasmobranch osmoregulation are discussed in light of experimental data collected from studies conducted on the silky shark cell line.
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Date Issued: 1992
PURL: http://purl.flvc.org/fcla/dt/14795
Subject Headings: Sharks, Cell culture, Chondrichthyes
Format: Document (PDF)

Title: The effects of systemic herbicide used for invasive species management on a native Florida scrub seed bank.
Creator: Ryan, Kathleen S., Florida Atlantic University, Violin, John
Abstract/Description: This study focused on whether use of ArsenalRTM to control an invasive, non-indigenous tree, Schinus terebinthifolius, would either negatively affect the seed bank in treatment areas of the study site or seeds in litter, 0-5 cm or 5-15 cm layers of the bank. Neither examining the whole site nor the two habitats produced conclusive results, but examining the three layers did. The litter layer appeared to be most sensitive to herbicide treatment with a 47% (p=0.03) reduction in seedling...
Show moreThis study focused on whether use of ArsenalRTM to control an invasive, non-indigenous tree, Schinus terebinthifolius, would either negatively affect the seed bank in treatment areas of the study site or seeds in litter, 0-5 cm or 5-15 cm layers of the bank. Neither examining the whole site nor the two habitats produced conclusive results, but examining the three layers did. The litter layer appeared to be most sensitive to herbicide treatment with a 47% (p=0.03) reduction in seedling emergence after treatment. Analysis of herbicide effect therefore required studying depth, habitat and study site. The litter layer, seldom considered in seed bank studies, produced 33% of emerging seedlings in this study. It is an extremely important component as it is the first place seeds are deposited before they percolate down into the soil. Damage to this layer will not only affect current seedling emergence, but future content of the seed bank below the surface.
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Date Issued: 2005
PURL: http://purl.flvc.org/fcla/dt/13301
Subject Headings: Soil seed banks--Florida, Soil absorption and adsorption--Florida, Soil remediation--Florida, Ecosystem management--Florida
Format: Document (PDF)

Title: The behavioral attributes of victimized children.
Creator: Pierce, Sharon Louise., Florida Atlantic University, Perry, David G.
Abstract/Description: Based on a peer nomination device measuring victimization and aggression (VAI), 172 children from grades four through seven were classified into four subgroups: aggressive victims, nonaggressive victims, aggressive nonvictims, and nonaggressive nonvictims. Another peer nomination inventory measuring 13 behavioral attributes (BAI) was used to assess behaviors correlated with the subject classifications. Distinctive behavioral profiles for the four subgroups were found. Of particular importance...
Show moreBased on a peer nomination device measuring victimization and aggression (VAI), 172 children from grades four through seven were classified into four subgroups: aggressive victims, nonaggressive victims, aggressive nonvictims, and nonaggressive nonvictims. Another peer nomination inventory measuring 13 behavioral attributes (BAI) was used to assess behaviors correlated with the subject classifications. Distinctive behavioral profiles for the four subgroups were found. Of particular importance were findings supporting the hypothesis that two distinct types of victims exist: aggressive or "provocative" victims and nonaggressive or "passive" victims. Both types of victims lack prosocial skills and reinforce aggressive attacks by crying, but the two types of victims differ in how they elicit aggression. The provocative victim evidences disruptive behavior, blames others, has difficulty managing conflict, and is perceived as dishonest. The passive victim is withdrawn but expresses anxiety and depression, signalling vulnerability. Implications for conceptualization of peer problem behavior and for intervention are discussed.
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Date Issued: 1990
PURL: http://purl.flvc.org/fcla/dt/14593
Subject Headings: Victims--Psychology, Aggressiveness in children
Format: Document (PDF)

Title: The Single Minded 2 Gene (SIM2) and Cancer: Harnessing Micro-Array Data to Facilitate Pathway Discovery and Validation.
Creator: Aleman, Mireille J., Narayanan, Ramaswamy, Florida Atlantic University
Abstract/Description: A Down's Syndrome related Single Minded 2 gene (SIM2), previously known to be associated with Trisomy 21 was predicted by bioinformatics to be colon cancer specific. In previous work from the laboratory using a patient tissue repository, an isoform of this gene, short form (SIM2-s) was shown to be colon cancer specific. Inhibition of SIM2-s expression by antisense technology resulted in cancer-cell specific apoptosis within 24 hours. Microarray-based gene expression profiling of the antisense...
Show moreA Down's Syndrome related Single Minded 2 gene (SIM2), previously known to be associated with Trisomy 21 was predicted by bioinformatics to be colon cancer specific. In previous work from the laboratory using a patient tissue repository, an isoform of this gene, short form (SIM2-s) was shown to be colon cancer specific. Inhibition of SIM2-s expression by antisense technology resulted in cancer-cell specific apoptosis within 24 hours. Microarray-based gene expression profiling of the antisense-treated colon cancer cells provided a fingerprint of genes involving key cell cycle, apoptosis, DNA damage and differentiation genes. Taking hints from the microarray database, experiments were initiated to decipher the molecular mechanism underlying the cancer specific function of the SIM2-s gene. Using an isogenic cell system, apoptosis was found to be dependent on DNA damage and repair gene, GADD45-a. Further, key pathways including p38 MAP kinase (MAPK) and specific caspases were essential for apoptosis. Programmed cell death was not dependant on cell cycle and was preceded by the induction of terminal differentiation. To clarify whether SIM2-s function is a critical determinant of differentiation, stable transfectants of SIM2-s were established in a murine adipocytic cell line (3T3-L 1 ). SIM2-s overexpression caused a pronounced block of differentiation of the pre-adipocytes into mature adipocytes. A study of the differentiation pathway in 3T3-L 1 cells suggested that this block occurs early on in the cascade. These results supported the starting premise that SIM2-s is a critical mediator of cell differentiation. To clarify whether the SIM2-s gene has transforming potential, the SIM2-s gene was overexpressed in the NIH3T3 murine fibroblast cell line. The cells expressing the human SIM2-s gene exhibited shorter doubling time, abrogation of growth serum requirement, greater cell number at saturation density and focus formation. In vivo tumorigenicity assays showed tumor formation with long latency. These results provide strong evidence for the role of SIM2-s gene in tumor cell growth and differentiation, and validate drug therapy use for the gene.
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Date Issued: 2007
PURL: http://purl.flvc.org/fau/fd/FA00000845
Subject Headings: Cancer--Genetic aspects, DNA microarrays--Diagnostic use, Apoptosis--Molecular aspects, Medical informatics, Gene expression--Research--Methodology
Format: Document (PDF)

Title: The Role of Exoribonucleases and MutT Pyrophosphohydrolase in the Surveillance of Oxidatively-damaged RNA.
Creator: Zhang, Jianan, Li, Zhongwei, Florida Atlantic University
Abstract/Description: Three important exoribonucleases degrading RNAs in sequence-independent manner, RNase II, RNase Rand polynucleotide phosphorylase (PNPase), were shown to protect cells against oxidative stress. This is presumably due to the function of the exoribonucleases in the removal of oxidized RNA in cells. MutT pyrophosphohydrolase .was previously reported to scavenge oxidized nucleotides 8-oxoGTP and 8-oxoGDP, prevent their incorporation into RNA. Deficiency of MutT may lead to an increase in the...
Show moreThree important exoribonucleases degrading RNAs in sequence-independent manner, RNase II, RNase Rand polynucleotide phosphorylase (PNPase), were shown to protect cells against oxidative stress. This is presumably due to the function of the exoribonucleases in the removal of oxidized RNA in cells. MutT pyrophosphohydrolase .was previously reported to scavenge oxidized nucleotides 8-oxoGTP and 8-oxoGDP, prevent their incorporation into RNA. Deficiency of MutT may lead to an increase in the level of 8-oxoG in RNA, which may enhance the requirement of the RNA surveillance function of the exoribonucleases. This study focuses on the roles of the RNA-degradation exoribonucleases in the removal of oxidatively-damaged RNA in the mutT background. This work shows that mutT mutation enhances the sensitivity of the RNase mutants to hydrogen peroxide. Growth defect of the pnp mutT mutant was detected even under normal aeration, but was rescued to the level of pnp mutant under anaerobic conditions. The pnp mutT mutant shows high mutator activity observed from LacZ reporter system and high level of 8-oxoG in RNA, strongly suggest that PNPase is responsible for removing 8-oxoG containing RNAs elevated in mutT background. Additionally, genetic instability observed from the mutant lacking RNase II and MutT supports the idea that RNase II may adopt a distinct pathway to reduce deleterious effect from oxidation challenge.
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Date Issued: 2007
PURL: http://purl.flvc.org/fau/fd/FA00000856
Subject Headings: Nucleic acids--Oxidation, DNA repair, Chemical mutagenesis
Format: Document (PDF)

Title: The Use Of Overlapping Vs. Non-Overlapping Moving Block Bootstrapping To Estimate The Variance Of A Statistic Of Dependent Data.
Creator: Davis, Benjamin F., Radulovic, Dragan, Florida Atlantic University
Abstract/Description: Determining the variance of a statistic (such as the sample median) can be difficult. Various methods of Bootstrapping (re-sampling with replacement) were used to estimate variance of one or more statistics based on a single sample. This estimator was compared to the empirical estimators based on repeated simulations of various sample sizes from a given distribution. Of particular interest was which of the methods of Bootstrapping were most effective with a dependent data set. Different...
Show moreDetermining the variance of a statistic (such as the sample median) can be difficult. Various methods of Bootstrapping (re-sampling with replacement) were used to estimate variance of one or more statistics based on a single sample. This estimator was compared to the empirical estimators based on repeated simulations of various sample sizes from a given distribution. Of particular interest was which of the methods of Bootstrapping were most effective with a dependent data set. Different degrees of dependency were used for the simulations with dependent data.
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Date Issued: 2008
PURL: http://purl.flvc.org/fau/fd/FA00000738
Subject Headings: Bootstrap (Statistics), Social sciences--Statistical methods, Mathematical statistics, Sampling (Statistics), Estimation theory, Nonparametric statistics
Format: Document (PDF)

Title: The Role of Chemoreception and Host-Use on the Behavioral Ecology of the Pea Crab Tunicotheres moseri (Rathbun, 1918) in Tampa Bay, Florida.
Creator: Ambrosio, Louis J., Brooks, W. Randy, Florida Atlantic University
Abstract/Description: The pinnotherid Tunicotheres moseri (Rathbun, 1918) is a common symbiont with various solitary ascidians throughout its reported range of Jamaica, Venezuela, and West Florida. Cues affecting host use and host recognition in the West Florida population were the focus ofthis study. T. moseri responded to conspecific and host generated chemical cues in the water column. Although host generated chemical cues were recognized by T. moseri, tactile cues triggered much stronger responses to host...
Show moreThe pinnotherid Tunicotheres moseri (Rathbun, 1918) is a common symbiont with various solitary ascidians throughout its reported range of Jamaica, Venezuela, and West Florida. Cues affecting host use and host recognition in the West Florida population were the focus ofthis study. T. moseri responded to conspecific and host generated chemical cues in the water column. Although host generated chemical cues were recognized by T. moseri, tactile cues triggered much stronger responses to host ascidians. Results of conditioning trials suggest that T. moseri is a generalist in host use and accepts novel host species after conditioning with Molgula occidentalis and Phallusia nigra. However, T. moseri prefers S. plicata after conditioning with novel host species. The results of this study suggest that any genetic divergence existing between geographically disjunct populations of T. moseri are probably due to limited dispersal potential rather than population specific host fidelity and host use characteristics.
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Date Issued: 2008
PURL: http://purl.flvc.org/fau/fd/FA00000724
Subject Headings: Marine animals--Physiology--Florida--Tampa Bay, Marine animals--Ecology--Florida--Tampa Bay, Crabs--Behavior--Florida--Tampa Bay, Rathbun, Mary Jane,--1860-1943--Research
Format: Document (PDF)

Title: The Influence of a System of Values Upon Academic Behavior.
Creator: Scott, Tully, Michels, Kenneth M., Florida Atlantic University
Abstract/Description: The purpose of this study was to investigate the extent to which centrally-held value systems affect scholastic behavior. The variables examined were thirteen discrete value systems generated by Morris' Ways to Live (1956), student SCAT scores, student cumulative GPA and range of grades. Particular attention was paid to students holding Appollonian and Promethean values, since it was postulated that students holding Appollonian values would have a significantly higher correlation coefficient...
Show moreThe purpose of this study was to investigate the extent to which centrally-held value systems affect scholastic behavior. The variables examined were thirteen discrete value systems generated by Morris' Ways to Live (1956), student SCAT scores, student cumulative GPA and range of grades. Particular attention was paid to students holding Appollonian and Promethean values, since it was postulated that students holding Appollonian values would have a significantly higher correlation coefficient between their SCAT scores and GPA than the student holding Promethean values. Additionally, it was predicted that the mean GPA of the Appollonian students would be significantly greater than that of the Promethean; that the standard deviation of the Appollonian GPA would be significantly less than that of the Promethean, and that the Appollonian range of grades would be significantly less than that of the Promethean students. One hundred and forty-eight students enrolled at the University of Florida were scored on three separate measuring instruments of Morris' Ways to Live and those holding Appollonian or Promethean values were identified by four separate operations. Correlation coefficients between SCAT scores and GPA were obtained for both Appollonian and Promethean students identified under each of the four separate operations. The correlation coefficients of the Appollonian students were compared with those of the Promethean students after being properly transformed for such comparison. In addition, the mean GPA and range of grades of the Appollonian and Promethean students were compared to determine if there were significant differences between both variables for the differing groups of students. Moreover, frequency distribution analysis of all of the thirteen discrete Ways to Live, together with correlation coefficients analysis between them and SCAT, GPA and grade ranges were computed. The main hypothesis and all predictions failed to reach statistical significance at the .01 level , and at the .05 level only on two of the four measures of Appollonianism - Prometheanism were there significant findings , and that solely with regard to differences in mean GPA. Nothing further appeared significant. Moreover, there appeared to be no substantial correlations of SCAT, GPA or grade range with any of the thirteen Ways to Live. Although no strong conclusions can be drawn from the data, they do lead to the speculation that the student sample used in this study was eclectic in the values they held, favoring several other values more than those of Appollonianism and Prometheanism, thus contributing to the non-support of the data to the main hypothesis.
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Date Issued: 1969
PURL: http://purl.flvc.org/fau/fd/FA00000827
Subject Headings: Personality and academic achievement, Prediction of scholastic success, Personality and intelligence
Format: Document (PDF)

Title: The Inactive Self: Mental Representation of Dormant Social Roles.
Creator: Moyer, Ryan M., Sagristano, Michael D., Florida Atlantic University
Abstract/Description: A significant portion of the self is constructed from our actions and the roles to which they correspond. Although many of our social roles are enacted regularly, some may lay dormant, yet still influence one's self-concept. We propose that there are systematic differences in mental representation between these inactive roles and more active roles. Specifically, inactive roles should be more likely to be construed in high-level terms, while active roles should be more likely to be construed...
Show moreA significant portion of the self is constructed from our actions and the roles to which they correspond. Although many of our social roles are enacted regularly, some may lay dormant, yet still influence one's self-concept. We propose that there are systematic differences in mental representation between these inactive roles and more active roles. Specifically, inactive roles should be more likely to be construed in high-level terms, while active roles should be more likely to be construed in lowlevel terms. Experiment 1 found that for inactive roles, participants displayed an implicit construal preference for the high-level aspects of the role. Experiment 2 provided evidence that an implicit measure of construal was necessary in order to tap these unconscious associations. These experiments support the hypothesis that inactive social roles are mentally represented in a unique manner with respect to more active roles.
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Date Issued: 2007
PURL: http://purl.flvc.org/fau/fd/FA00000801
Subject Headings: Self-esteem, Identity (Psychology), Personal construct therapy, Social perception
Format: Document (PDF)

Title: The Influence of Alcohol in Chronic Cocaine Abuse: A Follow up Study.
Creator: Simmers, Chad Paul, Rosselli, Monica, Florida Atlantic University
Abstract/Description: Background: Alcohol is the substance most commonly abused in combination with cocaine. Few studies have explored the effect of alcohol on memory recovery of chronic cocaine users. Moreover, results from these studies are often contradictory. The current study compared the effects of alcohol in a sample of cocaine dependent individuals, with and without concomitant alcohol abuse, at early and late abstinence. Methods: Verbal and non-verbal memory ability was tested in 18 cocaine only (COC) and...
Show moreBackground: Alcohol is the substance most commonly abused in combination with cocaine. Few studies have explored the effect of alcohol on memory recovery of chronic cocaine users. Moreover, results from these studies are often contradictory. The current study compared the effects of alcohol in a sample of cocaine dependent individuals, with and without concomitant alcohol abuse, at early and late abstinence. Methods: Verbal and non-verbal memory ability was tested in 18 cocaine only (COC) and 30 dual cocaine and alcohol (CA) dependent participants at 2 weeks and around 3 months after admission to a rehabilitation facility. Verbal immediate and delay memory were assessed using the Digit Span subset of the Wechsler Adult Intelligence Scale - Revised (WAIS-R) and the California Verbal Learning test (CVLT); non verbal immediate and delay memory were measured using the Benton Visual Retention Test (BVRT) and the Rey-Osterrieth Complex Figure test (ROCFT). Results: The cocaine participants exhibited a similar memory recovery profile in short term memory tasks independently of their history of alcohol abuse. However, significant group differences emerged in delayed memory tasks. On the ROCFT delayed memory test the CA group performed significantly worse than the COC group with significantly less improvement in scores during abstinence as well. The reduced score enhancement during abstinence in theCA group was also observed in the CVL T delayed memory variables. Conclusions: The present study suggests that the use of alcohol in combination with cocaine may have an effect on memory recovery with specific impact on long-term memory tasks.
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Date Issued: 2008
PURL: http://purl.flvc.org/fau/fd/FA00000829
Subject Headings: Cocaine abuse--Psychological aspects, Alcoholism--Psychological aspects, Substance abuse--Physiological aspects, Neurobiology
Format: Document (PDF)

Title: Rhythmicity, synchrony and resonance within the circuit of Papez.
Creator: Albo Angelus, Zimbul, Florida Atlantic University, Vertes, Robert P.
Abstract/Description: Single unit activity from the anterior thalamus (AT) was recorded in order to investigate discharge profiles during desynchronized (large amplitude irregular activity (LIA)), and synchronized (theta rhythm) patterns of the hippocampal EEG. Units were recorded in urethane-anesthetized rats in the anteroventral (AV, n = 96), the anterodorsal (AD, n = 44) and the anteromedial (AM, n = 48) thalamic nuclei. The majority of the units (n = 164, 87%) were theta-on and a small group (n = 24, 13%) was...
Show moreSingle unit activity from the anterior thalamus (AT) was recorded in order to investigate discharge profiles during desynchronized (large amplitude irregular activity (LIA)), and synchronized (theta rhythm) patterns of the hippocampal EEG. Units were recorded in urethane-anesthetized rats in the anteroventral (AV, n = 96), the anterodorsal (AD, n = 44) and the anteromedial (AM, n = 48) thalamic nuclei. The majority of the units (n = 164, 87%) were theta-on and a small group (n = 24, 13%) was theta-off. Theta-off cells were found in AD and AM nuclei but not in AV. Theta-on cells increased their discharge in presence of hippocampal theta. Mean discharge rate was 6.0 +/- 0.52 Hz and 14.48 +/- 0.96 Hz for AV theta-on cells during control and theta states, 4.43 +/- 0.52 Hz and 10.05 +/- 1.28 Hz for AD theta-on cells, and 2.60 +/- 0.3 Hz and 6.42 +/- 0.9 Hz for AM theta-on cells, respectively. We found that 40% of AV cells showed a rhythmic pattern that peaked significantly at 250--270 ms during theta, 21.9% of AD units and only 5.7% for AM units showed a rhythmic pattern. The majority of AT cells showed unit-theta phase-locked EEG oscillations in the crosscorrelogram, indicating that in spite of low rhythmicity most units firing were modulated at theta frequency. The coherence measured by spectral analysis between unit firing and hippocampal theta was statistically significant in 75% of cases. The anatomical distribution of the cells shows that coherence values were widely distributed across the anterior thalamus. In addition, the particular contribution of this diencephalic structure during theta was determined by applying measures of information flow in the neural circuit of Papez. Partial coherence (PC) analysis together with the computation of causality measures (DTF and DC) was used to study such interaction among AV, retrosplenial cortex and hippocampus. PC analysis revealed hippocampus as the synchronizing structure for rhythmic AV cells and retrosplenial cortex. A link between hippocampus and retrosplenial cortex was found for the non-rhythmic AV group. The DTF analysis showed flow of propagation from AV to hippocampus, hippocampus to retrosplenial cortex and AV to retrosplenial cortex for both groups. The strength of connection changed depending on the state of the animal. Behaviors that have been particularly related to the hippocampal theta activity refer mainly to learning and memory. Activation of large numbers of septo-hippocampal neurons during the generation of the theta rhythm has been proposed as a 'natural tetanizer'. Numerous cellular studies have linked long-term potentiation (LTP) and the hippocampal theta rhythm. The role of theta in memory has been evidenced through lesion studies in animals. Some observations in humans have proposed the anterior thalamus as pivotal for spatial memory. Perhaps the cellular theta activity found in AV plays an important role in the generation and control of the hippocampal theta rhythm and hence in memory and learning.
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Date Issued: 2002
PURL: http://purl.flvc.org/fcla/dt/11976
Subject Headings: Neural circuitry, Electroencephalography, Hippocampus (Brain)
Format: Document (PDF)

Title: STEADY STATE TRANSPORT WITH ISOENERGETIC AND NEUTRINO-ELECTRON SCATTERING.
Creator: BALLESTER, JORGE LUIS., Florida Atlantic University, Bruenn, Stephen W.
Abstract/Description: Steady state solutions to the Boltzmann transport equation were obtained for the transport of neutrinos across a finite, plane parallel slab using discrete ordinate methods. Semi-analytic solutions were obtained in the case of isoenergetic, isotropic scattering for one energy group and in the restricted case of isoenergetic and nonisoenergetic (Compton), isotropic scattering between two energy groups where the isoenergetic and the Compton scattering rates are the same for the two groups. For...
Show moreSteady state solutions to the Boltzmann transport equation were obtained for the transport of neutrinos across a finite, plane parallel slab using discrete ordinate methods. Semi-analytic solutions were obtained in the case of isoenergetic, isotropic scattering for one energy group and in the restricted case of isoenergetic and nonisoenergetic (Compton), isotropic scattering between two energy groups where the isoenergetic and the Compton scattering rates are the same for the two groups. For these two cases solutions were obtained for total optical thicknesses of 0.2, 2, and 20. When the Compton scattering rates of the two energy groups are allowed to be different, the transport equation becomes nonlinear due to the exclusion principle. For this case a numerical scheme was developed which yielded solutions for slabs having optical thicknesses up to unity.
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Date Issued: 1980
PURL: http://purl.flvc.org/fcla/dt/14014
Subject Headings: Electron transport, Neutron transport theory
Format: Document (PDF)

Title: THE SENSORY BASIS OF HOST LOCATION BY THE PEARLFISH, CARAPUS BERMUDENSIS (JONES).
Creator: VAN METER, VICTORIA BROOK., Florida Atlantic University
Abstract/Description: This study was designed to determine the sensory basis of host location by the pearlfish, Carapus bermudensis (Jones). Forty-eight hour aquaria observations and examination of stomach contents revealed that pearlfish emerge, probably nightly, shortly after dark and feed on small crustaceans. Experiments in a two-way choice apparatus demonstrate that pearlfish locate the host holothurian, Actinopyga agassizi (Selenka), by olfaction. Vision and rheotaxis are not used as alternative methods of'...
Show moreThis study was designed to determine the sensory basis of host location by the pearlfish, Carapus bermudensis (Jones). Forty-eight hour aquaria observations and examination of stomach contents revealed that pearlfish emerge, probably nightly, shortly after dark and feed on small crustaceans. Experiments in a two-way choice apparatus demonstrate that pearlfish locate the host holothurian, Actinopyga agassizi (Selenka), by olfaction. Vision and rheotaxis are not used as alternative methods of' host location or in conjunction with olfaction. These findings are analyzed in terms of the present knowledge of sensory competence in fish.
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Date Issued: 1974
PURL: http://purl.flvc.org/fcla/dt/13628
Subject Headings: Carapidae, Sea cucumbers, Host-parasite relationships
Format: Document (PDF)

Title: A SEASONAL STUDY OF SESSILE MARINE FOULING ORGANISMS IN NORTHERN LAKE WORTH, FLORIDA.
Creator: BANE, LENI LORENZ., Florida Atlantic University, Marsh, G. Alex
Abstract/Description: Seasonal settling patterns and community development of the fouling complex on gelcoat-covered fiber glass plates (103.22 cm2 ) were observed from September 1976 to September 1977 at three stations in northern Lake Worth, Florida. Percent coverage for each species was estimated using 60 points randomly positioned over the plate area. Physico-chemical conditions at stations 1 and 2 were relatively stable, whereas station 3 was subjected to wide variations in salinity and, to a lesser extent,...
Show moreSeasonal settling patterns and community development of the fouling complex on gelcoat-covered fiber glass plates (103.22 cm2 ) were observed from September 1976 to September 1977 at three stations in northern Lake Worth, Florida. Percent coverage for each species was estimated using 60 points randomly positioned over the plate area. Physico-chemical conditions at stations 1 and 2 were relatively stable, whereas station 3 was subjected to wide variations in salinity and, to a lesser extent, dissolved oxygen. Plates at stations 1 and 2 consistently collected more species than those at station 3. Peak settling and growth at all stations occurred in the spring and early summer. Three species settled only on plates that had been previously colonized. Even though gelcoat-covered fiber glass was designed to discourage fouling, it proved to be a satisfactory substrate for a thriving community.
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Date Issued: 1979
PURL: http://purl.flvc.org/fcla/dt/13981
Subject Headings: Fouling organisms, Marine fouling organisms--Florida--Lake Worth
Format: Document (PDF)

Title: Rydberg excitations of benzene using magnetic circular dichroism with synchrotron radiation from 8.41 to 8.33 eV.
Creator: Munger, Robert C., Florida Atlantic University, Snyder, Patricia Ann
Abstract/Description: This research is devoted in part to investigating the electronic structure of benzene, which will help to provide a foundation for understanding its behavior. Absorption and magnetic circular dichroism (MCD) data were collected for benzene and deuterated benzene in the vacuum ultraviolet region of the electromagnetic spectrum from 67,870 cm^-1 to 67,155 cm^-1 (8.415 eV to 8.326 eV). MCD data, when considered along with absorption data, gives information about the symmetry designations of...
Show moreThis research is devoted in part to investigating the electronic structure of benzene, which will help to provide a foundation for understanding its behavior. Absorption and magnetic circular dichroism (MCD) data were collected for benzene and deuterated benzene in the vacuum ultraviolet region of the electromagnetic spectrum from 67,870 cm^-1 to 67,155 cm^-1 (8.415 eV to 8.326 eV). MCD data, when considered along with absorption data, gives information about the symmetry designations of electronic transitions. It is concluded that benzene and deuterated benzene each show transitions to pz-type and several f-type Rydberg orbitals in this spectral range. In addition, several Fortran computer programs have been developed to aid in the determination of these orbital symmetries.
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Date Issued: 1995
PURL: http://purl.flvc.org/fcla/dt/15150
Subject Headings: Benzene--Structure, Rydberg states, Electronic structure
Format: Document (PDF)

Title: THE SPECTRAL DEPENDENCE OF THE PHOTOCONDUCTIVE RESPONSE IN INDIUM-DOPED SILICON.
Creator: MASON, HOWARD JOSEPH, JR., Florida Atlantic University
Abstract/Description: The spectral dependence of extrinsic photoconductivity over the range 130 meV to 700 meV has been measured (mostly at 80°K, with light chopped at 270 Hz) for a variety of indium doped silicon crystals. Samples were characterized by 70°- 400°K Hall and conductivity measurements, and had indium densities ranging from 7 x 10^15 cm^-3 to 6 x 10^17 cm^-3. Crystals of moderately large and very small compensation were used. Data was converted into response per incident photon and per absorbed photon...
Show moreThe spectral dependence of extrinsic photoconductivity over the range 130 meV to 700 meV has been measured (mostly at 80°K, with light chopped at 270 Hz) for a variety of indium doped silicon crystals. Samples were characterized by 70°- 400°K Hall and conductivity measurements, and had indium densities ranging from 7 x 10^15 cm^-3 to 6 x 10^17 cm^-3. Crystals of moderately large and very small compensation were used. Data was converted into response per incident photon and per absorbed photon, using photoionization cross-section data measured on the same group of crystals. The response per absorbed photon is approximately constant over the studied spectral range for most crystals, with no visible evidence of an oscillatory component. The data was Fourier analyzed in order to emphasize any latent periodicity in the photo-response. A weak periodic component at 10 meV intervals was found and tentatively associated with localized phonon modes.
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Date Issued: 1971
PURL: http://purl.flvc.org/fcla/dt/13428
Subject Headings: Silicon crystals, Indium, Photoconductivity, Semiconductor doping
Format: Document (PDF)

Title: Tiling Z with Triples Using Signed Permutation Matrices.
Creator: Cattell, Liam J., Meyerowitz, Aaron, Florida Atlantic University
Abstract/Description: The topic of this paper is tiling the integers with triples, or more precisely to write Z as a disjoint union of translates of a given set of 3-subsets composed of basic shapes called prototiles. We fix the set of proto tiles P = { { 0, a, a+ v} , { U. b, a+ b}} and define an algorithm which returns a sequence of translates of P when given an initial subset of Z representing integers that are already tiled. This algorithm is then adapted to describe all possible tilings with triples from P...
Show moreThe topic of this paper is tiling the integers with triples, or more precisely to write Z as a disjoint union of translates of a given set of 3-subsets composed of basic shapes called prototiles. We fix the set of proto tiles P = { { 0, a, a+ v} , { U. b, a+ b}} and define an algorithm which returns a sequence of translates of P when given an initial subset of Z representing integers that are already tiled. This algorithm is then adapted to describe all possible tilings with triples from P using the action of certain signed permutation matrices on a subset of za+b , uamdy the 2" Yectors with all entries ±1. Given b > 2a, we research properties of the digraph of all possible tiling states and some related digraphs.
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Date Issued: 2007
PURL: http://purl.flvc.org/fau/fd/FA00000732
Subject Headings: Tiling (Mathematics), Sequences (Mathematics), Permutation groups
Format: Document (PDF)

Title: Three new measures of gender identity: Implications for children's psychosocial development.
Creator: Egan, Susan K., Florida Atlantic University, Perry, David G.
Abstract/Description: The present dissertation introduces three new measures of gender identity and examines their relations to psychosocial adjustment (i.e., self-concept and peer acceptance) in preadolescence. The sample consisted of 182 4th- through 8th-grade children. The three measures assessed (a) feelings of overall similarity to and compatibility with one's gender (goodness-of-fit), (b) feelings of pressure to conform to sex-role stereotypes (felt pressure), and (c) belief that one's sex is superior to the...
Show moreThe present dissertation introduces three new measures of gender identity and examines their relations to psychosocial adjustment (i.e., self-concept and peer acceptance) in preadolescence. The sample consisted of 182 4th- through 8th-grade children. The three measures assessed (a) feelings of overall similarity to and compatibility with one's gender (goodness-of-fit), (b) feelings of pressure to conform to sex-role stereotypes (felt pressure), and (c) belief that one's sex is superior to the other sex (intergroup bias). Both concurrent and short-term longitudinal analyses indicated that goodness-of-fit was beneficial to psychosocial adjustment, whereas both felt pressure and intergroup bias undermined psychosocial adjustment. Furthermore, goodness-of-fit mediated many of the relations of domain-specific sex-typing measures (e.g., traits) to adjustment. The present dissertation helps identify some of the inherent limitations in previous work on gender identity, provides new insight into the relation of children's gender identity and psychosocial development, and raises suggestions for future inquiry.
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Date Issued: 1999
PURL: http://purl.flvc.org/fcla/dt/12616
Subject Headings: Gender identity, Identity (Psychology) in children, Sex differences (Psychology) in children, Child development
Format: Document (PDF)

Title: Thought- and information-induced polarization: The role of involvement in making attitudes extreme.
Creator: Harton, Helen C., Florida Atlantic University, Latane, Bibb
Abstract/Description: The catastrophe theory of attitudes (Latane & Nowak, 1994) predicts that extremity will be a function of involvement, with uninvolving attitudes normally distributed about a neutral midpoint and involving attitudes categorical and extreme. Two processes that may lead attitudes to become more involving and extreme were tested in this experiment--thought-induced polarization and information-induced polarization. College students rated social issues before and after thinking and/or reading...
Show moreThe catastrophe theory of attitudes (Latane & Nowak, 1994) predicts that extremity will be a function of involvement, with uninvolving attitudes normally distributed about a neutral midpoint and involving attitudes categorical and extreme. Two processes that may lead attitudes to become more involving and extreme were tested in this experiment--thought-induced polarization and information-induced polarization. College students rated social issues before and after thinking and/or reading information about them. Attitudes became more extreme after respondents read mixed information about the attitude object, particularly for issues on which participants were initially uninvolved, but did not extremify after thought alone. There was little evidence for selective encoding or retrieval or for biased assimilation, though increases in attitude extremity were associated with increases in involvement. Thus, as predicted by catastrophe theory, reading mixed information may increase involvement in an issue, which in turn leads to more extreme attitudes.
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Date Issued: 1994
PURL: http://purl.flvc.org/fcla/dt/15110
Subject Headings: Attitude change, Attitude (Psychology), Polarity (Psychology)
Format: Document (PDF)

Title: Three impenetrable particles on a ring and the quantum billiard in a triangle.
Creator: Dirk, Charlotte Joan, Florida Atlantic University, McGuire, James B.
Abstract/Description: Remarkable similarities are found in the problem of three impenetrable quantum mechanical particles on a ring and the problem of the quantum billiard in a triangle. If the energy contributed by the motion of the center of mass in the ring problem is subtracted from the total energy, the energy eigenvalues of the particles on the ring are proportional to the energy eigenvalues of the wave function in the corresponding triangle. The eigenvalues derived from the ring solution are unique to that...
Show moreRemarkable similarities are found in the problem of three impenetrable quantum mechanical particles on a ring and the problem of the quantum billiard in a triangle. If the energy contributed by the motion of the center of mass in the ring problem is subtracted from the total energy, the energy eigenvalues of the particles on the ring are proportional to the energy eigenvalues of the wave function in the corresponding triangle. The eigenvalues derived from the ring solution are unique to that triangle and that energy level. A mathematical relationship is derived, which connects the masses of the particles on the ring to the angles of the triangle. There are three quantum billiard triangles that have previously been solved by the method of separation of variables. The three quantum particles on a ring problem, however, has now been solved for many cases. By correlating the three known triangle solutions to the masses on the ring problem we derive and verify a relationship between the two problems. For the three known triangle solutions, the eigenvalues found in the ring problem are proportional to those found in the triangle. The correlation between the masses on the ring and the triangle is then used to find solutions to other triangles, which do not yield to solution by separation of variables.
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Date Issued: 2002
PURL: http://purl.flvc.org/fau/fd/FADT12005
Subject Headings: Quantum theory, Wave mechanics, Statistical mechanics
Format: Document (PDF)

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