Not all screens are created equal: examination of surface features and other physical properties of commonly used screen materials for smoking drugs.

BACKGROUND: Brass screens are considered an essential part of the safer drug smoking/inhalation supplies and are widely distributed by harm reduction programs in Canada. However, the use of commercially available steel wools as screens for smoking crack cocaine remains a common practice among people who smoke drugs in Canada. Use of these steel wool materials is associated with different adverse effects on health. This study aims to determine what changes folding and heating have on several filter materials, including brass screens and commercially available steel wool products, and examine the implications of these changes on health of people who smoke drugs. METHODS: This study investigated the microscopic differences, studied by optical and scanning electron microscopy, between four screen and four steel wool filter materials used in a simulated drug consumption process. New materials were manipulated, compacted into its own Pyrex® straight stem using a push stick and then heated with a butane lighter simulating a common method in preparing drugs for consumption. The materials were studied in the as-received (new), as-pressed (compressed and inserted into the stem tube but without heating) and as-heated (compressed and inserted into the stem tube and heated with a butane lighter) conditions. RESULTS: The steel wool materials with the smallest wire thicknesses were found to be the easiest to prepare for pipe use, but degrade significantly during shaping and heating, making them wholly unsuitable as a safe filter material. In contrast the brass and stainless steel screen materials remain mostly unchanged by the simulated drug consumption process. After the stainless steel pellet screen, the Brass Impact 2.0 screen material had the best characteristics of the materials tested due to its mesh wire diameter, pitch, alloy choice and its pre-strained state. CONCLUSION: Commonly used steel wool alternatives degrade during the handling and stem insertion, and heating the screens in the stem. Debris is generated by wool deformation on insertion and after heating that easily separates from the screen and can be inhaled during drug consumption. The brass and stainless steel screen materials are safer to use as they remain mostly stable during the simulated drug consumption process.

Developing national best practice recommendations for harm reduction programmes: Lessons learned from a community-based project.

Through promotion of consistent, evidence-based policy and practice, best practice recommendations can improve service delivery. Nationally relevant best practice recommendations, including guidance for programmes that provide service to people who use drugs, are often created and disseminated by government departments or other national organisations. However, funding priorities do not always align with stakeholder- and community-identified needs for such recommendations, particularly in the case of harm reduction. We achieved success in developing and widely disseminating best practice documents for Canadian harm reduction programmes by bringing together a multi-stakeholder, cross-regional team of people with relevant and diverse experience and expertise. In this commentary, we summarise key elements of our experience to contribute to the literature more detailed and transparent dialogue about team processes that hold much promise for developing best practice resources. We describe our project's community-based principles and process of working together (e.g., regularly scheduled teleconferences to overcome geographic distance and facilitate engagement), and integrate post-project insights shared by our team members. Although we missed some opportunities for power-sharing with our community partners, overall team members expressed that the project offered them valuable opportunities to learn from each other. We aim to provide practical considerations for researchers, other stakeholders, and community members who are planning or already engaged in a process of developing best practice recommendations for programmes and interventions that address drug use.

Intercrystalline distal-effect on the afterglow phenomenon in photoluminescent SrAl2O4:CeIII, Ln nanotube growth.

We report a new method for the synthesis of photoluminescent SrAl(2)O(4):Ce(3+), Dy(3+), Eu(2+) nanotubes, PL-SNT:Ce(III), Ln, using solid-state reaction and post-annealing approach. This new optical nanotubular structure was characterized by HRTEM, SEM, AFM, EDX, steady-state and time-resolved PL spectroscopy. A series of f-f and f-d-transitions with light emission in structured bands peaking at 488 nm arising from the polymorphism of the host lattice was correlated with an intercrystalline distal-effect on the afterglow phenomenon.

Delivering primary care to homeless persons: a policy analysis approach to evaluating the options.

Homeless persons are numerous, carry a significant burden of illness and face challenges in accessing care. A search of the literature revealed insufficient empirical sources to permit the use of standard systematic review methodology to determine the most effective way to deliver point-of-first-contact healthcare to homeless people. Instead, we used a policy analysis approach. We found that the dominant model of primary care in Canada performs poorly when assessed on 13 evaluation criteria. While there is variable performance on individual measures, the three alternative models - targeted standard facility/clinic site, fixed outreach site and mobile outreach service - all perform well. Our findings suggest that some factor other than performance on the specified measures, such as costs, feasibility, geographical fit or local preferences, should be used to choose a specific model. Our analysis clearly indicates that the status quo model of primary care is inadequate to meet the needs of homeless people.