1,175 research outputs found
A Preliminary Investigation of Acculturative Stress and Diurnal Cortisol Among Latina Women
The interplay between biological and cultural factors has remained understudied among ethnic minority groups, including Latinos. To the best of our knowledge, minimal to no research has examined the relationship between acculturative stressors and diurnal cortisol among Latina women. This initial exploratory study sought to examine the relationship between cortisol and acculturative stress. Among a small sample of adult Latina women, salivary cortisol was collected at 3 time points (waking, 30 min postwaking, and bedtime) to assess the cortisol awakening response (CAR) and diurnal cortisol response. Information regarding acculturative stress and acculturation was also collected. The major results showed that high levels of acculturative stress were associated with a blunted CAR and a flatter diurnal cortisol response when compared to low levels of acculturative stress. These preliminary findings highlight the potential role of cultural stressors in contributing to the biological stress response
Creep of Nextel 720/Alumina Ceramic Matrix Composite with Diamond-Drilled Effusion Holes at 1200°C in Air and in Steam
A recent study evaluated tensile stress-strain and tensile creep behavior of an oxide-oxide composite (Nextel™720/alumina) with laser-drilled effusion holes at 1200°C. It was determined that the presence of laser-drilled holes degraded the mechanical properties and performance of the CMC as a result of damage caused to the composite microstructure by the laser drilling process. Based on these results, the present effort sought to assess the effects of diamond-drilled holes on the mechanical behavior of this CMC. Tensile properties of the N720/A composite at 1200°C in laboratory air were unaffected by the presence of an array of 17 diamond-drilled effusion holes. Notably, examination of the composite microstructure did not reveal any damage caused by the drilling process. The diamond-drilled specimens exhibited similar degradation to creep lifetimes as laser-drilled specimens for creep tests between 46-150 MPa in air, but contrary to unnotched and laser-drilled specimens, saw minimal degradation to creep lifetimes due to steam. These results were attributed to a change in dominant damage mechanism that caused minimum creep rates in air to exceed those in steam. Further experiments and analysis are needed to explore the damage mechanism at play in specimens with diamond-drilled effusion holes
Does Weight Status Impact Metabolic Health in Adolescents When Controlling for Physical Fitness?
Purpose:
To determines whether adolescents who are fit with overweight/obesity are similar in their metabolic profile to adolescents who are fit and normal weight. Methods:
Adolescents participated in 3 sessions: (1) resting vitals and anthropometrics; (2) maximal aerobic treadmill test () to determine physical fitness; and (3) dual-energy x-ray absorptiometry and fasting laboratory draw for analysis of insulin, glucose, high-density lipoprotein, triglycerides, and C-reactive protein. Results:
Of the 30 fit adolescents who are normal weight and 16 adolescents who are fit and overweight/obese (OW/OB), metabolic syndrome was apparent in 1 adolescent who are normal weight and 4 adolescents who are OW/OB. Metabolic syndrome severity was positively associated with body mass index, waist circumference, total body fat, insulin resistance, and C-reactive protein but inversely associated with peak relative, but not lean . Conclusions:
Despite good physical fitness, adolescents who are OW/OB demonstrated greater metabolic syndrome than adolescents who are normal weight. Future intervention research is necessary to explore the relation between physical fitness and metabolic syndrome
Molecular Diagnosis of Sexually Transmitted Chlamydia trachomatis in the United States
Chlamydia, with its Chlamydia trachomatis etiology, is the most common bacterial sexually transmitted infection in the United States and is often transmitted via asymptomatic individuals. This review summarizes traditional and molecular-based diagnostic modalities specific to C. trachomatis. Several commercially available, FDA-approved molecular methods to diagnose urogenital C. trachomatis infection include nucleic acid hybridization, signal amplification, polymerase chain reaction, strand displacement amplification, and transcription-mediated amplification. Molecular-based methods are rapid and reliable genital specimen screening measures, especially when applied to areas of high disease prevalence. However, clinical and analytical sensitivity for some commercial systems decreases dramatically when testing urine samples. In vitro experiments and clinical data suggest that transcription-mediated amplification has greater analytical sensitivity than the other molecular-based methods currently available. This difference may be further exhibited in testing of extragenital specimens from at-risk patient demographics. The development of future molecular testing could address conundrums associated with confirmatory testing, medicolegal testing, and test of cure
Examining the role of faith community groups with sexual offenders: A systematic review
The aim of this paper is to examine the role of faith-based communities and activities in helping those convicted of sexual offending to desist from crime and reintegrate back into their communities. It was found that much of the current research is limited to non-offending juvenile populations. Where research has been carried out on adult offenders, these tend to be custodial cases and exclude those convicted of sexual offending. The role of religious and spiritual groups in helping people convicted of sexual offending to desist from crime, while reintegrating into the community is, therefore, unknown. A number of parallels between the factors needed to promote desistance from sexual offending and the conditions encountered when engaged with a faith community are outlined. We would note that a religious and spiritual environment can: promote motivation to change, provide access to pro-social peers, offer moral guidance, provide a support network, and help bring meaning into people's lives. The potential for people to use faith-based communities or organizations to facilitate offending are also considered. Finally, implications for probation work and future research are also discussed
Supraspinal Fatigue Is Similar in Men and Women for a Low-Force Fatiguing Contraction
Purpose: This study determined the contribution of supraspinal fatigue to the sex difference in neuromuscular fatigue for a low-intensity fatiguing contraction. Because women have greater motor responses to arousal than men, we also examined whether cortical and motor nerve stimulation, techniques used to quantify central fatigue, would alter the sex difference in muscle fatigue.
Methods: In study 1, cortical stimulation was elicited during maximal voluntary contractions (MVC) before and after a submaximal isometric contraction at 20% MVC with the elbow flexor muscles in 29 young adults (20 ± 2.6 yr, 14 men). In study 2, 10 men and 10 women (19.1 ± 2.9 yr) performed a fatiguing contraction in the presence and absence of cortical and motor nerve stimulation.
Results: Study 1: Men had a briefer time to task failure than women (P = 0.009). Voluntary activation was reduced after the fatiguing contraction (P \u3c 0.001) similarly for men and women. Motor-evoked potential area and the EMG silent period increased similarly with fatigue for both sexes. Peak relaxation rates, however, were greater for men than women and were associated with time to task failure (P \u3c 0.05). Force fluctuations, RPE, HR, and mean arterial pressure increased at a greater rate for men than for women during the fatiguing contraction (P \u3c 0.05). Study 2: Time to task failure, force fluctuations, and all other physiological variables assessed were similar for the control session and stimulation session (P\u3e 0.05) for both men and women. Conclusions: Supraspinal fatigue was similar for men and women after the low-force fatiguing contraction, and the sex difference in muscle fatigue was associated with peripheral mechanisms. Furthermore, supraspinal fatigue can be quantified in both men and women without influencing motor performance
Cellulose-Chitosan-Keratin Composite Materials: Synthesis, Immunological and Antibacterial Properties
Novel composites were synthesized from keratin (KER), cellulose (CEL) and chitosan (CS). The method is recyclable because majority (\u3e88%) of [BMIm+Cl-], an ionic liquid (IL), used as the sole solvent, was recovered for reuse. Experimentally, it was confirmed that unique properties of each component remain intact in the composites, namely bactericide (from KER and CS) and anti-inflammatory property (from KER). Specifically, the composites were examined for their anti-inflammatory influence on macrophages. The cells were imaged and immunophenotyped to determine the quantity using the macrophage marker CD11b. The 75:25 [KER+CS] composite was found to have the least amount of CD11b macrophages compared to other composites. Bactericidal assays indicated that all composites, except the 25:75 [KER+CS], substantially reduce the growth of organisms such as vancomycin resistant Enterococcus (VRE) and Eschericia coli. The results clearly indicate that the composites possess all properties needed for effective use as a wound dressin
Effective risk management planning for those convicted of sexual offending
Purpose – The purpose of this paper is to examine the extent to which risk is addressed in the risk management planning process of those convicted of sexual offending.
Design/methodology/approach – Data were collected from a risk assessment and management system called the Offender Assessment System (OASys), used by the National Offender Management Service, in England and Wales. The records of 216 clients were accessed and each risk management plan analysed. The study aimed to understand if first, general and sexual risk factors identified by assessors were recorded and detailed in subsequent plans; second, if specialist sexual offending risk assessment tools were used to inform risk management strategies; and third, if both a balance of control and support mechanisms were in place to tackle identified risk and needs of clients.
Findings – Inconsistencies were found in relation to practitioners transposing risks identified, into the subsequent risk management plans. Strategies were therefore deemed, inadequate as there was a significant omission of the use of specialist sexual risk assessment tools to inform and ensure risk assessment to be robust. In addition risk management plans were often overbearing in nature, as assessors tended to utilise control strategies to assist the reintegration process, in contrast to a combination of both control and support.
Research limitations/implications – This sample was taken from only one probation trust in England and Wales. The findings might therefore be unique to this organisation rather than be representative of national practice. This study should therefore, be replicated in a number of other probation areas. In addition, it is important to note that this study only reviewed one electronic tool used by practitioners. Therefore, while it might appear for example that the RM2000 tool was not routinely completed; this cannot be assumed as practitioners might have adopted local custom and practice, recording RM2000 scores elsewhere.
Practical implications – These findings highlight the need for some understanding as to why there is a lack of consistency throughout the risk management planning process. Practitioners should receive ongoing risk management training, development and supportive supervision. In particular, practitioners require supervision that supports and develops their skills when applying RM2000 classifications to their clients’ risk management plans. Likewise initiatives which develop practitioner’s awareness and application of strengths based approaches such as the Good Lives Model should be encouraged. These will help practitioners develop plans that address both the risks while supporting their development of the strengths a client presents.
Originality/value – To the authors’ knowledge, this is the first study of its kind, which examines the risk management plans of those convicted of sexual offending, completed by practitioners in England and Wales using the OASys tool
Effect of Preanalytical Processing of ThinPrep Specimens on Detection of High-Risk Human Papillomavirus by the Aptima HPV Assay
Two important preanalytical protocols performed on liquid-based cytological specimens, namely, automated cytology processing and glacial acetic acid (GAA) treatment, may occur prior to the arrival of specimens in a molecular diagnostics laboratory. Ninety-two ThinPrep vials previously positive for high-risk human papillomavirus (HPV) via the Cervista HPV HR test were preselected and alternated with 92 previously negative ThinPrep vials. The specimen set was processed in a consecutive fashion by an automated cytology processor without fastidious decontamination precautions. Carryover potential was subsequently assessed by performance of the Aptima HPV assay on aliquots from reprocessed ThinPrep vials. All previously negative ThinPrep vials yielded a negative result following routine automated cytology processing, despite close proximity to known-positive ThinPrep vials. In separate experiments, aliquots from 236 ThinPrep vials were forwarded for tandem analysis with and without GAA treatment. Data from GAA- and mock-treated specimens generated by Aptima HPV were compared to correlate data generated by Cervista. A 99.2% concordance of Aptima HPV results from GAA-treated and mock-treated specimens was noted. This result differed from the concordance result derived from Cervista (91.5%; P \u3c 0.0002). Of the initially positive Cervista results, 21.9% reverted to negative following GAA treatment; the correlate value was 2.7% for Aptima HPV (P = 0.01). While deleterious effects of GAA treatment on genomic DNA were noted with Cervista (P = 0.0015), GAA treatment had no significant effects on Aptima HPV specimen signal/cutoff ratios or amplification of internal control RNA (P ≥ 0.07). The validity of an Aptima HPV result is independent of GAA treatment and routine automated cytology processing
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Effects of a Prototypical Training Program on the Implementation of Systematic Observational Data Collection on Iep Objectives for the Core Deficits of Autism Spectrum Disorders
Legal mandates and best practice recommendations for the education of students with autism spectrum disorders (ASD) emphasize the importance of systematic, ongoing observational data collection in order to monitor progress and demonstrate accountability. The absence of such documentation in decision-making on instructional objectives indicates a weakness in bridging the research-to-practice gap in special education. Utilizing a multiple baseline design across participants, the current study evaluated the effects of a prototypical teacher training program (i.e., workshop, checklist, in-classroom training with feedback, and maintenance with a thinned schedule of feedback) on the frequency of data collection on core deficits of ASD and the use of data-based decision-making. Results indicate increases in daily mean frequency of data collection following intervention. Maintenance and generalization indicates variable responding across participants. Effect size (Cohen's d) indicates a large, clinically significant effect of the training program. Results are discussed in relation to training models, maintenance, and future research
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