A PCR marker Linked to a THCA synthase Polymorphism is a Reliable Tool to Discriminate Potentially THC‐Rich Plants of Cannabis sativa L.

Neither absolute THC content nor morphology allows the unequivocal discrimination of fiber cultivars and drug strains of Cannabis sativa L. unequivocally. However, the CBD/THC ratio remains constant throughout the plant's life cycle, is independent of environmental factors, and considered to be controlled by a single locus (B) with two codominant alleles (B_T and B_D). The homozygous B_T/B_T genotype underlies the THC‐predominant phenotype, B_D/B_D is CBD predominant, and an intermediate phenotype is induced by the heterozygous state (B_T/B_D). Using PCR‐based markers in two segregating populations, we proved that the THCA synthase gene represents the postulated B locus and that specific sequence polymorphisms are absolutely linked either to the THC‐predominant or the THC‐intermediate chemotype. The absolute linkage provides an excellent reliability of the marker signal in forensic casework. For validation, the species‐specific marker system was applied to a large number of casework samples and fiber hemp cultivars.     

Childhood Violence and Adult Partner Maltreatment: The Roles of Coping Style and Psychological Distress

The study investigates the impact of psychological well-being, coping style, and maltreatment types on adult partner maltreatment patterns. A large sample of undergraduates completed assessments measuring history of childhood violence exposure, psychological distress, coping, and adult partner maltreatment. The multiply abused group (childhood physical abuse and witnessing family violence) experienced the highest levels of all forms of adult maltreatment, followed by the childhood physical abuse group. As childhood victimization became more severe, the relationship between childhood victimization and adult partner maltreatment became more direct. The current study highlights that individuals exposed to a greater degree of childhood victimization are more vulnerable to adult maltreatment because there are few mediators which may prevent or decrease risk for adult maltreatment. The results suggest that treatment and prevention efforts with victims of interpersonal violence should foster individualized coping skills and address specific psychopathology depending upon the individual??s childhood abuse history.     

Business as Usual? Economic Responses to Political Tensions

Do political tensions harm economic relations? Theories claim that trade prevents war and political relations motivate trade, but less is known about whether smaller shifts in political relations impact economic exchange. Looking at two major economies, we show that negative events have not hurt U.S. or Japanese trade or investment flows. We then examine specific incidents of tensions in U.S.‐French and Sino‐Japanese relations over the past decade—two case pairs that allow us to compare varying levels of political tension given high existing economic interdependence and different alliance relations. Aggregate economic flows and high salience sectors like wine and autos are unaffected by the deterioration of political relations. In an era of globalization, actors lack incentives to link political and economic relations. We argue that sunk costs in existing trade and investment make governments, firms, and consumers unlikely to change their behavior in response to political disputes.     

The utility of polyester and cotton as swabbing substrates for the removal of cellular material from surfaces

Various types of cotton and polyester fabrics were tested to ascertain the optimal physical and chemical characteristics of fabrics needed for the removal of cellular material from surfaces. DNA quantitation values obtained on dried saliva stains showed no difference between cotton and polyester across all constructions and solvent conditions. Fabrics used dry and with water yielded higher quantitation values than those used with isopropanol. Quantitation values were also higher for wovens and nonwovens than knits across all solvent conditions. Low thread count fabrics used with water yielded higher quantitation values, but no correlation between thread count and quantitation values was observed with dry fabrics. A low thread count woven fabric, however, outperformed other tested fabrics when swabbing object surfaces in a highly used room. Full DNA profiles from fingerprints on glass surfaces were obtained with low thread count woven and nonwoven fabrics but not with the knit fabric tested.     

A radiographic assessment of pediatric fracture healing and time since injury

Past studies and pediatric bone physiology indicate that younger individuals may heal at a faster rate. Additionally, in adults upper limb fractures heal faster than lower limb fractures; this trend is expected for pediatric fractures. This study aims to evaluate and compare rates of fracture repair in children based on age and skeletal element. Six stages are used to describe the bone repair process in 294 radiographs of tibial and radial fractures from 107 infants and young children. Healing rates are examined using ANOVA and Welch's t-test with a 95% confidence interval. Results indicate that younger individuals spend less time at stage 1, suggesting a delay in the start of healing. Furthermore, forearm fractures heal faster than leg fractures at stages 2 and 3, suggesting a role in the osseous reaction of bone healing. The healing schedule presented may allow the timing of injuries to be estimated from radiographs.