SEX EDUCATION LEFT AT THE THRESHOLD OF THE SCHOOL DOOR: STRICTER REQUIREMENTS FOR PARENTAL OPT‐OUT PROVISIONS

Current state law creates the risk that, if sex education is not provided to a child in public school, no similar instruction will be given to the child. Legislatively enacted opt‐out provisions give parents broad control over their child's education by granting them the option to have their child excused from any sex education requirements within a public school's curriculum. Through public school sex education, professionals provide youth information aimed at protecting them from the dangers of pregnancy and sexually transmitted diseases (STDs). A stricter statutory opt‐out provision should be enacted by state legislatures that only allows parents to excuse their child from sex education after a parent attends a 90‐minute STD prevention course and receives the instructional material used in the school's sex education curriculum. Parents should be provided up‐to‐date information and a structural framework designed by the school to encourage them to discuss with their child the many sexual issues addressed within a school's sex education curriculum.     

Phenolphthalein False‐Positive Reactions from Legume Root Nodules

Presumptive tests for blood play a critical role in the examination of physical evidence and in the determination of subsequent analysis. The catalytic power of hemoglobin allows colorimetric reactions employing phenolphthalein (Kastle‐Meyer test) to indicate “whether” blood is present. Consequently, DNA profiles extracted from phenolphthalein‐positive stains are presumed to be from blood on the evidentiary item and can lead to the identification of “whose” blood is present. Crushed nodules from a variety of legumes yielded phenolphthalein false‐positive reactions that were indistinguishable from true bloodstains both in color quality and in developmental time frame. Clothing and other materials stained by nodules also yielded phenolphthalein false‐positive reactivity for several years after nodule exposure. Nodules from leguminous plants contain a protein (leghemoglobin) which is structurally and functionally similar to hemoglobin. Testing of purified leghemoglobin confirmed this protein as a source of phenolphthalein reactivity. A scenario is presented showing how the presence of leghemoglobin from nodule staining can mislead investigators.     

Validation of presumptive tests for non-human blood using Kastle Meyer and Hemastix reagents

Kastle Meyer and Hemastix reagents are presumptive tests commonly used in forensic casework for the detection of blood, and their suitability has been reviewed in numerous publications. However, studies to date have focused on the validation of these tests on human blood alone, and no published work has looked at the sensitivity, specificity and effect on DNA analysis when using these reagents to presumptively test for animal blood. The aim of this study was to validate the two reagents for use with animal blood, and compare their performance in order to choose the best test based on the circumstances in wildlife crime investigation.The sensitivity, specificity, stability and robustness of the methods were assessed by experiments with dilutions of animal blood (from 1:4 to 1:65536) using direct and indirect (rub) tests, potential interfering substances, blood sources from different species and aged blood. The effects of the two reagents on subsequent DNA analysis were also investigated.During the direct tests, Kastle Meyer showed a higher sensitivity, detecting blood down to a dilution of 1:16,384, one order of magnitude lower than Hemastix. However during the rub test, Hemastix showed a higher sensitivity, detecting blood down to a dilution of 1:64 on porous materials while Kastle Meyer was positive only down to a dilution of 1:16. Moreover, when using the same swab for presumptive testing and DNA extraction, Hemastix testing allowed amplification of a sufficient amount of DNA for species identification at its limit of sensitivity on porous materials (1:64) while Kastle Meyer inhibited most amplification of DNA at its less sensitive limit of 1:16 dilution. On the other hand, Hemastix showed a much lower specificity, producing false positive results when exposed to tomato, potato, rust, avian uric acid, bleach and sink rot, while Kastle Meyer only produced a faint positive reaction from potato. Both tests performed equally well detecting fresh blood of different animal species. The stability test gave comparable results among the tests except for aged fish blood stains, where the Kastle Meyer test performed poorly.Owing to its ease of use, higher sensitivity, and lack of interference with downstream DNA analysis, and despite its reduced specificity compared to Kastle Meyer, the Hemastix method is more appropriate for use in wildlife crime investigations. Positive results would always be confirmed with DNA analysis and the low interference of the reagent will allow the use of a single swab for presumptive testing and DNA sampling.     

Fictional power and control and the reality of abusive behaviour

In response to recent sociological studies that suggest that the seriousness of psychological, emotional and verbal abuse are not only dismissed but are also the least identified in dating relationships, this article undertakes an analysis of these underexplored, ‘less visible’, elements using Ellen Pence and Michael Paymar’s ‘Power and Control’ and ‘Equality’ wheels, it compares Stephanie Meyer’s 10th anniversary re-release of Twilight, and Life and Death: Twilight Reimagined, which tells the same story as Twilight, but with the genders reversed are compared using the ‘Power and Control’ and ‘Equality’ wheels. The author argues that Life and Death is not just a simple swap of names and pronouns, as Meyer asserts, but that the alterations of thoughts and actions of the characters reflect commonly held ideas about gender, including the perpetration of psychological, emotional and verbal abuse in intimate relationships as hallmarks of masculinity. Moreover it shows that consistent with the feminisation of vampire Edythe Cullen and mortal Beau Swan, the intimate relationship in Life and Death more closely resembles that of a non-violent and equitable relationship, which significantly lessens the abuse, and reinforces traditionally socially accepted messages about gender in intimate relationships.