Ten years of juvenile referrals from the district courts to the Boston psychopathic hospital

Thesis (M.S.)--Boston University, 1939. This item was digitized by the Internet Archive

Utilizing the NSSE to Examine Behavior and Characteristic Differences between First-Year Students Who Persisted with First-Year Students Who Did Not Persist

This study examined the differences between first-year students who persisted with first-year students who did not persist to the second year at a mid-size, doctorate-granting, public, research university in the mid-south. Specifically, the study utilized the National Survey of Student Engagement (NSSE) to compare the level of student-faculty interaction, experiences with the campus environment, and engagement in collaborative learning. Additionally, the study examined whether the differences in the three student engagement behaviors varied by gender, race/ethnicity, and first-generation college student status. Three theoretical frameworks were used as the foundation for the study including Tinto’s model of institutional action, Astin’s theory of involvement, and Kuh’s construct of student engagement. The final sample included 1,402 degree-seeking first-year students who completed the survey in the spring of 2016. Results were analyzed using descriptive statistics and independent samples t-Tests. With the overall sample, the analysis revealed that persisters had significantly higher mean scores with engagement in collaborative learning than non-persisters. Also, female non-persisters were found to have significantly higher levels of student-faculty interaction than female persisters. Furthermore, white student persisters reported significantly better experiences with the campus environment than white student non-persisters. Likewise, the analysis revealed that white student persisters were more engaged in collaborative learning than white student non-persisters. These results provide a number of opportunities for institutions exploring initiatives that may influence their levels of student engagement and retention rates. Specifically, the NSSE can be a beneficial tool with helping institutions utilize their resources to identify policies, programs, and practices that can have a positive influence on student persistence

\u3cem\u3eBeauveria bassiana\u3c/em\u3e, A Cotton Endophyte With Biocontrol Activity Against Seedling Disease

Beauveria bassiana isolate 11-98 is entomopathogenic, endophytic in tomato, and has biocontrol activity against Rhizoctonia solani on tomato. The objectives of this study were to determine 1) if B. bassiana is endophytic in cotton, following seed treatment; 2) if B. bassiana can protect cotton against seedling pathogens; 3) if different conidial rates, applied to seed, alter effectiveness of B. bassiana; and 4) mechanisms of biocontrol used by B. bassiana against plant pathogens. Cotton ‘Delta Pine 436’ seed was inoculated with isolate 11-98 conidia, sown in a gnotobiotic system, and then isolated from surfacesterilized seedlings on selective medium. Using scanning electron microscopy, hyphal penetration of epithelial cells was observed. Using ITS primers, polymerase chain reaction (PCR), and electrophoresis of PCR products, 11-98 was detected (single 421-bp band) in a dilution series of fungal and plant DNA, and from cotton seedlings endophytically colonized by 11-98. Biocontrol of B. bassiana against R. solani, Pythium myriotylum, and Thielaviopsis basicola was examined using several seed treatment rates (log 5 to log 11 CFU). Disease was suppressed and plant growth was increased in potting mix with B. bassiana at log 7 and log 9 CFU/seed, and in sandy loam soil at log 7 CFU/seed. With low disease pressure from P. myriotylum, seed treated with 11-98 or BotaniGard isolate GHA increased plant growth. Assays with T. basicola were inconclusive. Beauveria bassiana was evaluated for induced systemic resistance in cotton against Xanthomonas axonopodis pv. malvacearum. Root drench treatments were B. bassiana at log 5, log 7, and log 9 CFU/ml, untreated, 2,6-dichloro-isonicotinic acid (INA), and untreated without Xanthomonas. After 13 days, primary leaves were wounded and challenge-inoculated with Xanthomonas. Treatment with B. bassiana (log 7 CFU/seed) had less disease than untreated controls and was as effective as INA. In antibiosis assays, Beauveria bassiana out-competed T. basicola on cotton agar, however no clear zone of inhibition was observed; B. bassiana was outcompeted by R. solani and P. myriotylum, however it maintained its original colony diameter. Beauveria bassiana hyphae coiled around P. myriotylum hyphae in parasitism assays; no coiling was observed with R. solani; results for T. basicola were inconclusive

Deviations from ozone photostationary state during the International Consortium for Atmospheric Research on Transport and Transformation 2004 campaign: Use of measurements and photochemical modeling to assess potential causes

Nitric oxide (NO) and nitrogen dioxide (NO2) were monitored at the University of New Hampshire Atmospheric Observing Station at Thompson Farm (TF) during the ICARTT campaign of summer 2004. Simultaneous measurement of ozone (O3), temperature, and the photolysis rate of NO2 (jNO2) allow for assessment of the O3 photostationary state (Leighton ratio, Φ). Leighton ratios that are significantly greater than unity indicate that peroxy radicals (PO2), halogen monoxides, nitrate radicals, or some unidentified species convert NO to NO2 in excess of the reaction between NO and O3. Deviations from photostationary state occurred regularly at TF (1.0 ≤ Φ ≤ 5.9), particularly during times of low NOx (NOx = NO + NO2). Such deviations were not controlled by dynamics, as indicated by regressions between Φ and several meteorological parameters. Correlation with jNO2 was moderate, indicating that sunlight probably controls nonlinear processes that affect Φ values. Formation of PO2 likely is dominated by oxidation of biogenic hydrocarbons, particularly isoprene, the emission of which is driven by photosynthetically active radiation. Halogen atoms are believed to form via photolysis of halogenated methane compounds. Nitrate radicals are believed to be insignificant. Higher Φ values are associated with lower mixing ratios of isoprene and chloroiodomethane and lower ratios of NOx to total active nitrogen, indicating that photochemical aging may very well lead to increased Φ values. PO2 levels calculated using a zero‐dimensional model constrained by measurements from TF can account for 71% of the observed deviations on average. The remainder is assumed to be associated with halogen atoms, most likely iodine, with necessary mixing ratios up to 0.6 or 1.2 pptv, for chlorine and iodine, respectively

Genetic identification of phage P22 antigens and their structural location.

Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Biology.Microfiche copy available in Archives and Science.Bibliography : leaves 272-276.Ph.D

Complete Genome Sequences of Four Putatively Antibiotic-Producing Bacteria Isolated from Soil in Arkansas, USA

Soil bacteria can be a valuable source of antimicrobial compounds. Here, we report the complete genomes of four soil bacteria that were isolated by undergraduate microbiology students as part of a course-based research experience. These genomes were assembled using a hybrid approach combining paired-end Illumina reads with Oxford Nanopore Technologies MinION reads

Characterization of aerosol associated with enhanced small particle number concentrations in a suburban forested environment

Two elevated particle number/mass growth events associated with Aitken‐mode particles were observed during a sampling campaign (13–29 September 2004) at the Duke University Free‐Air CO2 Enrichment facility, a forested field site located in suburban central North Carolina. Aerosol growth rates between 1.2 and 4.9 nm hr−1 were observed, resulting in net increases in geometric mean diameter of 21 and 37 nm during events. Growth was dominated by addition of oxidized organic compounds. Campaign‐average aerosol mass concentrations measured by an Aerodyne quadrupole aerosol mass spectrometer (Q‐AMS) were 1.9 ± 1.6 (σ), 1.6 ± 1.9, 0.1 ± 0.1, and 0.4 ± 0.4 μg m−3 for organic mass (OM), sulfate, nitrate, and ammonium, respectively. These values represent 47%, 40%, 3%, and 10%, respectively, of the measured submicron aerosol mass. Based on Q‐AMS spectra, OM was apportioned to hydrocarbon‐like organic aerosol (HOA, likely representing primary organic aerosol) and two types of oxidized organic aerosol (OOA‐1 and OOA‐2), which constituted on average 6%, 58%, and 36%, respectively, of the apportioned OM. OOA‐1 probably represents aged, regional secondary organic aerosol (SOA), while OOA‐2 likely reflects less aged SOA. Organic aerosol characteristics associated with the events are compared to the campaign averages. Particularly in one event, the contribution of OOA‐2 to overall OM levels was enhanced, indicating the likelihood of less aged SOA formation. Statistical analyses investigate the relationships between HOA, OOA‐1, OOA‐2, other aerosol components, gas‐phase species, and meteorological data during the campaign and individual events. No single variable clearly controls the occurrence of a particle growth event

Estimating the public health impact of the effect of herpes simplex virus suppressive therapy on plasma HIV-1 viral load.

OBJECTIVE: Trials of herpes simplex virus (HSV) suppressive therapy among HSV-2/HIV-1-infected individuals have reported an impact on plasma HIV-1 viral loads (PVLs). Our aim was to estimate the population-level impact of suppressive therapy on female-to-male HIV-1 sexual transmission. DESIGN AND METHODS: By comparing prerandomization and postrandomization individual-level PVL data from the first two HSV suppressive therapy randomized controlled trials in sub-Saharan Africa, we estimated the effect of treatment on duration of asymptomatic infection and number of HIV-1 transmission events for each trial. RESULTS: Assuming that a reduction in PVL is accompanied by an increased duration of HIV-1 asymptomatic infection, 4-6 years of HSV suppressive therapy produce a 1-year increase in the duration of this stage. To avert one HIV-1 transmission requires 8.8 [95% confidence interval (CI), 5.9-14.9] and 11.4 (95% CI, 7.8-27.5) women to be treated from halfway through their HIV-1 asymptomatic period, using results from Burkina Faso and South African trials, respectively. Regardless of the timing of treatment initiation, 51.6 (95% CI, 30.4-137.0) and 66.5 (95% CI, 36.7-222.6) treatment-years are required to avert one HIV-1 infection. Distributions of set-point PVL values from sub-Saharan African populations suggest that unintended adverse consequences of therapy at the population level (i.e. increased HIV-1 transmission due to increased duration of infection) are unlikely to occur in these settings. CONCLUSION: HSV suppressive therapy may avert relatively few HIV-1 transmission events per person-year of treatment. Its use as a prevention intervention may be limited; however, further research into its effect on rate of CD4 cell count decline and the impact of higher dosing schedules is warranted

Students in Action Initiative

The Students in Action Project in the School of Hospitality Management and Tourism was established in 2012 as a way of engaging students and working with stakeholders in a destination. The overall aim of the project was to immerse students in an active collaborative learning environment within the destination to identify ways in which tourism could be enhanced. In the 2014/2015 academic year the project involved over 300 students from a variety of programmes and modules working with local stakeholders in Wexford Town. To date the project has been successful in its aims to develop staff, student and community engagement and has generated positive impacts in terms of lecturer and student collaborations and has also provided substantial outcomes for the destination. Going forward, while posing challenges in terms of funding, timetabling and logistical issues, the project provides extensive opportunities for further enhancement of student engagement and collaborative learning