Mineral carbonation opportunities in the western United States

Mineral carbonation—the production of carbonates from carbon dioxide and alkaline earth compounds—is a candidate route for carbon capture and storage because alkali earth carbonates are stable over geologic time. Successful mineral carbonization requires a source of alkalinity near a source of carbon dioxide and a chemical pathway requiring only mild energy input. Please download the file below for full content

Relationship between latent and rebound viruses in a clinical trial of anti-HIV-1 antibody 3BNC117.

A clinical trial was performed to evaluate 3BNC117, a potent anti-HIV-1 antibody, in infected individuals during suppressive antiretroviral therapy and subsequent analytical treatment interruption (ATI). The circulating reservoir was evaluated by quantitative and qualitative viral outgrowth assay (Q2VOA) at entry and after 6 mo. There were no significant quantitative changes in the size of the reservoir before ATI, and the composition of circulating reservoir clones varied in a manner that did not correlate with 3BNC117 sensitivity. 3BNC117 binding site amino acid variants found in rebound viruses preexisted in the latent reservoir. However, only 3 of 217 rebound viruses were identical to 868 latent viruses isolated by Q2VOA and near full-length sequencing. Instead, 63% of the rebound viruses appeared to be recombinants, even in individuals with 3BNC117-resistant reservoir viruses. In conclusion, viruses emerging during ATI in individuals treated with 3BNC117 are not the dominant species found in the circulating latent reservoir, but frequently appear to represent recombinants of latent viruses

Convergent Antibody Responses to SARS-CoV-2 Infection in Convalescent Individuals

During the COVID-19 pandemic, SARS-CoV-2 infected millions of people and claimed hundreds of thousands of lives. Virus entry into cells depends on the receptor binding domain (RBD) of the SARS-CoV-2 spike protein (S). Although there is no vaccine, it is likely that antibodies will be essential for protection. However, little is known about the human antibody response to SARS-CoV-2. Here we report on 149 COVID-19 convalescent individuals. Plasmas collected an average of 39 days after the onset of symptoms had variable half-maximal pseudovirus neutralizing titres: less than 1:50 in 33% and below 1:1,000 in 79%, while only 1% showed titres above 1:5,000. Antibody sequencing revealed expanded clones of RBD-specific memory B cells expressing closely related antibodies in different individuals. Despite low plasma titres, antibodies to three distinct epitopes on RBD neutralized at half-maximal inhibitory concentrations (IC₅₀ values) as low as single digit nanograms per millitre. Thus, most convalescent plasmas obtained from individuals who recover from COVID-19 do not contain high levels of neutralizing activity. Nevertheless, rare but recurring RBD-specific antibodies with potent antiviral activity were found in all individuals tested, suggesting that a vaccine designed to elicit such antibodies could be broadly effective

An international effort towards developing standards for best practices in analysis, interpretation and reporting of clinical genome sequencing results in the CLARITY Challenge

There is tremendous potential for genome sequencing to improve clinical diagnosis and care once it becomes routinely accessible, but this will require formalizing research methods into clinical best practices in the areas of sequence data generation, analysis, interpretation and reporting. The CLARITY Challenge was designed to spur convergence in methods for diagnosing genetic disease starting from clinical case history and genome sequencing data. DNA samples were obtained from three families with heritable genetic disorders and genomic sequence data were donated by sequencing platform vendors. The challenge was to analyze and interpret these data with the goals of identifying disease-causing variants and reporting the findings in a clinically useful format. Participating contestant groups were solicited broadly, and an independent panel of judges evaluated their performance. RESULTS: A total of 30 international groups were engaged. The entries reveal a general convergence of practices on most elements of the analysis and interpretation process. However, even given this commonality of approach, only two groups identified the consensus candidate variants in all disease cases, demonstrating a need for consistent fine-tuning of the generally accepted methods. There was greater diversity of the final clinical report content and in the patient consenting process, demonstrating that these areas require additional exploration and standardization. CONCLUSIONS: The CLARITY Challenge provides a comprehensive assessment of current practices for using genome sequencing to diagnose and report genetic diseases. There is remarkable convergence in bioinformatic techniques, but medical interpretation and reporting are areas that require further development by many groups

Research Summary: Assessment

Assessment is important for middle level teachers and their students. In fact, the National Middle School Association (NMSA) highlighted curriculum, instruction, and assessment in This We Believe: Keys to Educating Young Adolescents (NMSA, 2010). The intention of this summary is to establish assessment’s rightful position as one priority for middle grade teachers and their students. When used wisely and well, teachers obtain information about their students’ strengths and needs, and their students remain informed about their achievements. To begin, educators need an operational definition of assessment. Based on the work of many scholars (e.g., Delclos, Vye, Burns, Bransford, & Hasselbring, 1992; Poehner, 2007), assessment is defined as a process for documenting, in measurable terms, the knowledge, skills, attitudes, and beliefs of the learner. Although this definition of assessment is rather straightforward, the process of assessment in the classroom is complex. At the classroom level, teachers must decide which specific knowledge, skills, attitudes, and beliefs warrant assessment; at what point and for what specific purpose they should be assessed; and which tools might best accomplish these classroom-based assessments. This research summary addresses two forms of assessment, formative and summative

The global landscape of kidney registries: immense challenges and unique opportunities.

Kidney registries are essential to understanding the burden of kidney disease and facilitating the development of sustainable and effective programs for kidney disease prevention and care. Key barriers to implementation of registries at a global scale include funding and data quality. These issues warrant the attention of the global nephrology community