Communication about Sexual Consent and Refusal: A Learning Tool and Qualitative Study of Adolescents' Comments on a Sexual Health Website

Sexual communication skills are needed to create healthy romantic relationships. Arguably, these skills also can be used to prevent some instances of unwanted sex. This study presents a qualitative analysis of adolescents' comments after reading a teen-friendly article on sexual consent as part of a web-based sexual health promotion intervention. The sample was comprised predominantly of female adolescents recruited from a Midwest urban region in the United States. Adolescents varied with respect to self-efficacy to request, provide, and deny consent, as well as the perceived need to ask for consent in the context of established relationships. Many adolescents perceived that nonverbal methods of communication were sufficient to request, provide, or deny sexual consent. Factors that make it difficult to discuss sexual boundaries and say "no" to unwanted sex included low self-efficacy and an underlying desire to nurture or preserve a relationship. Cultural norms must be changed to support verbal, affirmative sexual consent. In addition, adolescents must be aided in the development of skills to request sexual consent, say "yes" to specific activities, and say "no" to others. Without supportive norms and skills to enhance self-efficacy, adolescents may be unwilling to engage in verbal communication about sexual consent and boundaries.

The influence of nitrate on microbial processes in oil industry production waters

Sulfide accumulation due to bacterial sulfate reduction is responsible for a number of serious problems in the oil industry. Among the strategies to control the activity of sulfate-reducing bacteria (SRB) is the use of nitrate, which can exhibit a variety of effects. We investigated the relevance of this approach to souring oil fields in Oklahoma and Alberta in which water flooding is used to enhance oil recovery. SRB and nitrate-reducing bacteria (NRB) were enumerated in produced waters from both oil fields. In the Oklahoma field, the rates of sulfate reduction ranged from 0.05 to 0.16 microM S day(-1) at the wellheads, and an order of magnitude higher at the oil-water separator. Sulfide production was greatest in the water storage tanks in the Alberta field. Microbial counts alone did not accurately reflect the potential for microbial activities. The majority of the sulfide production appeared to occur after the oil was pumped aboveground, rather than in the reservoir. Laboratory experiments showed that adding 5 and 10 mM nitrate to produced waters from the Oklahoma and Alberta oil fields, respectively, decreased the sulfide content to negligible levels and increased the numbers of NRB. This work suggests that sulfate reduction control measures can be concentrated on aboveground facilities, which will decrease the amount of sulfide reinjected into reservoirs during the disposal of oil field production waters.

DrhoGEF3 encodes a new Drosophila DH domain protein that exhibits a highly dynamic embryonic expression pattern

The Rho GTPases regulate many different cellular and developmental processes, and activation of Rho GTPase signalling is mediated through interaction with the Dbl homology (DH) protein domain. We describe the expression pattern of DrhoGEF3 (cytological position 61B1-B3), which encodes a new member of the DH domain protein family from Drosophila and is a homologue of the human protein hPEM-2. During gastrulation and germ band extension, DrhoGEF3 exhibits a segmented expression pattern. DrhoGEF3 is subsequently expressed in the visceral mesoderm, at the sites of muscle attachment and in specific groups of sub-epidermal cells. The possible function of such a dynamically expressed signalling molecule is discussed.