An assessment of early mandibular growth

Quantification of skeletal data has been shown to be an effective and reliable method of demonstrating variation in human growth as well as for monitoring and interpreting growth. In South Africa as well as internationally, few researchers have assessed mandibular growth in late fetal period and early childhood and therefore standards for growth and age determination in these groups are limited. The purpose of this study was to evaluate growth in the mandible from the period of 31 gestational weeks to 36 months postnatal. A total of 74 mandibles were used. Dried mandibles were sourced from the Raymond A. Dart Collection (University of Witwatersrand), and cadaveric remains were obtained from the Universities of Pretoria and the Witwatersrand. The sample was divided into four groups; 31-40 gestational weeks (group 1), 0-11 months (group 2), 12-24 months (group 3), and 25-36 months (group 4). Twenty-one osteological landmarks were digitized using a MicroScribe G2. Ten standard measurements were created and included: the maximum length of mandible, mandibular body length and width, mandibular notch width and depth, mental foramen to inferior border of mandible, mandibular basilar widths bigonial and biantegonial, bigonial width of mental foramen and mental angle. Data were analyzed using PAST statistical software and Morphologika2 v2.5. Statistically significant differences were noted in the linear measurements for all group comparisons except between groups 3 and 4. The mandible morphologically changed from a round, smooth contour anteriorly to adopt a more sharp and narrow adult shape. A progressive increase in the depth and definition of the mandibular arch was also noted. In conclusion, the mandible initially grows to accommodate the developing tongue (up to 11 months), progressive dental eruption and mastication from 12 to 36 months. Mastication is associated with muscle mass development; this would necessitate an increase in the dimensions of the mandibular notch and associated muscle attachment sites. These findings might be valuable in the estimation of age in unidentified individuals and to monitor prenatal growth of the mandible for the early diagnosis of conditions associated with stunted mandibular growth.     

The role of alcohol and victim sexual interest in Spanish students' perceptions of sexual assault

Two studies investigated the effects of information related to rape myths on Spanish college students' perceptions of sexual assault. In Study 1, 92 participants read a vignette about a nonconsensual sexual encounter and rated whether it was a sexual assault and how much the woman was to blame. In the scenario, the man either used physical force or offered alcohol to the woman to overcome her resistance. Rape myth acceptance (RMA) was measured as an individual difference variable. Participants were more convinced that the incident was a sexual assault and blamed the woman less when the man had used force rather than offering her alcohol. In Study 2, 164 college students read a scenario in which the woman rejected a man's sexual advances after having either accepted or turned down his offer of alcohol. In addition, the woman was either portrayed as being sexually attracted to him or there was no mention of her sexual interest. Participants' RMA was again included. High RMA participants blamed the victim more than low RMA participants and were less certain that the incident was a sexual assault, especially when the victim had accepted alcohol and was described as being sexually attracted to the man. The findings are discussed in terms of their implications for the prevention and legal prosecution of sexual assault.     

Past victimizations and dating violence perpetration in adolescence: the mediating role of emotional distress and hostility

This study aimed to understand the nature of the relationships between three forms of past victimizations (exposure to interparental violence in childhood, sexual harassment by peers since beginning high school, prior experience of dating violence), physical dating violence perpetration by adolescents, and anger-hostility and emotional distress. The sample was composed of 1,259 high school students aged between 14 and 19 years who answered self-report questionnaires. Mediation analyses were conducted according to Baron and Kenny's approach. Logistic and linear regression analyses reveal that being victim of sexual harassment by peers and of dating violence are associated to physical dating violence perpetration via a partial mediating effect of hostility in girls. Contrary to results with girls, there is a complete mediating effect of emotional distress for boys. Results suggest that dating violence prevention and intervention strategies could be adapted according to gender and that sexual harassment should be addressed.     

Market Structure and R∧D Joint Ventures: The Case of Product Innovations

Departing from the received fact that research joint venture agreements are allowed on the grounds of a permissive ruling, we study what conditions are necessary for venture partners to carry on RD cooperation to the marketing stage. We treat the case of product innovations exploitable with different usages in unconnected markets. Two main results appear: firms always have incentives for a distribution of varieties, but not always agree on the distribution of products. The condition for the last result to happen gives a useful rule for antitrust authorities relating the degree of sustitutability across varieties and the relative profitability of the markets.     

Dignity,discrimination, and context: New directions in South African and Canadian human rights law

Conclusion The current approaches to equality law in South Africa and Canada place these jurisdictions at the forefront of serious and comprehensive judicial at tempts to give effect to substantive equality. These attempts to overcome formalism are processes, judicially acknowledged as such, and as yet far from complete. At the conceptual center of the development of substantive equality is the legal realization of human dignity: not an abstract, individualistic notion, but a concept about the relation between the individual and state, and individual and group, which is circumscribed by concern, respect and consideration. But substantive equality is not possible only through the case law. The current issues surrounding intersectional discrimination and the contextual appreciation of a claimant’s circumstances are urgent reminders that the methods and remedies afforded by the structure of litigation of equality rights claims simply cannot accommodate many instances which call for relief. The fact that these inadequacies of court enforced claims are beginning to be laid bare by some of the problems being faced by the Courts in equality claims is perhaps not a failing of equality law and the concept of dignity, but its strength. The methodology of human rights litigation in countries like Canada and South Africa supports a dialogue between court and legislature. As substantive equality develops in these jurisdictions, the limits of judicial development will be challenged. That is ultimately to be welcomed, if the legislatures are responsive to the definition of human dignity and substantive equality in development judicially, and respond with efforts to support and promote these developments.     

Identification of ten corticosteroids in human hair by liquid chromatography-ionspray mass spectrometry

This paper describes a screening procedure based upon high-performance liquid chromatography-ionspray mass spectrometry for the identification of ten corticosteroids in human hair: triamcinolone, prednisolone, prednisone, methylprednisolone, cortisone, cortisol, beta- and dexamethasone, flumethasone and beclomethasone. Hair strands were washed in methylene chloride, pulverized in a ball mill and 50 mg of the powdered hair were incubated in 1 ml Soerensen buffer, pH 7.6 for 16 h at 40 degrees C, in presence of 50 ng cortisol-d3 used as internal standard. Purification of the incubation medium was achieved on SPE C18 Isolute extraction columns. The eluates were evaporated to dryness and resuspended in 30 microliters MeOH before analysis by HPLC-IS-MS in positive and negative modes of detection. The validation parameters were found satisfactory for a corticosteroid screening procedure. The correlation coefficient of the calibration curve ranged from 0.939 to 0.997, showing linearity between 0.1 and 10 ng/mg, excepted for beclomethasone which was between 0.2 and 10 ng/mg. Extraction recovery at 4 ng/mg ranged from 43.2 to 85.7%. Repeatability (CV values) at 4 ng/mg ranged from 6.1 to 17.5%. The limits of detection ranged from 0.03 to 0.17 ng/mg for a signal-to-noise ratio of 2. The detection of prednisone and beclomethasone in three hair specimens obtained from forensic and clinical cases have documented corticosteroids incorporation into human hair.     

‘Fanm Se Poto Mitan’: Haitian Woman,the Pillar of Society

In this paper Marie-Jose N'zengou-Tayo draws on a variety of sources, both historical and contemporary, to describe the journey of Haitian women from nineteenth-century post-War of Independence, to present-day Haitian society.The paper is divided in two sections. In the first, the author traces a brief social history of women, quoting anthropological and sociological studies from the 1930s to the 1970s. She begins with rural peasant women noting their significant involvement in farming, marketing and in the internal food trade sector. The development of polygamy and common law unions as the most common form of conjugal union is seen as a practical response to survival in rural Haiti. The author notes the major impact on women's lives of continued political upheavals, violent repression, rural degradation and migration to the cities. Opportunities for employment in a deprived urban setting, and women's initiatives in income generating are also described under the Duvalier regimes. A brief overview of the lives of the middle class is included, although there is a paucity of research in this area available to the author. Violence against women is a regular threat facing domestic workers, and a means of repression used by the state against women across classes.In the second section N'Zengou-Tayo addresses the literary representation of Haitian women by both female and male Haitian writers. The paper examines how female writers have developed subversive narrative strategies to shape a female identity in order to break away from the stereotypes portrayed in men's writing.N'Zengou-Tayo concludes that the tremendous contribution of Haitian women to their society has neither been recognized nor documented. Despite this, the resilience of Haitian women, whether in their daily lives or in their writing, has enabled them to make strides towards improving their lives.