Discovering the Key to Academic Success for Black Students: The Process by which Black Students are Academically Successful

The racial academic achievement gap in America’s public schools persists although there is solid research explaining the elements that have led to and support it. Much of this research is deficit-based and highlights the vulnerabilities of those who fall at the bottom of that gap. Not enough research is invested in celebrating, highlighting, or exploring the experiences of the Black students who experience a reality of performing near or at the top of the gap. The research presented here was designed to provide a strengths-based view of a marginalized portion of America’s public-school students. The goal of this study is to uncover the common factors that contribute to academic success for Black students who attend public schools in suburbs surrounding the south Chicagoland area. The findings indicate that self-efficacy, school counselors, and resilience, among other factors, are characteristics held in common by the participants of this study. The practices and conditions highlighted help these students overcome the challenges of over a century of institutionalized racism and decades of factors that contribute to the racial academic gap between Black and White children who attend American public schools

A skeleton outline of Roman history: chronologically arranged

VIII, 191 p

High temperature properties of sodium, potassium, and cesium thirteenth progress report

Thermophysical properties of sodium, potassium, and cesium at high temperatures - density of liquid potassium and vapor pressure of cesiu

Dissociation of multiply charged negative ions for hirudin (54–65), fibrinopeptide B, and insulin A (oxidized)

AbstractCollision-induced dissociation (CID) was performed on multiply deprotonated ions from three commercial peptides: hirudin (54–65), fibrinopeptide B, and oxidized insulin chain A. Ions were produced by electrospray ionization in a Fourier transform ion cyclotron resonance mass spectrometer. Each of these peptides contains multiple acidic residues, which makes them very difficult to ionize in the positive mode. However, the peptides deprotonate readily making negative ion studies a viable alternative. The CID spectra indicated that the likely deprotonation sites are acidic residues (aspartic, glutamic, and cysteic acids) and the C-terminus. The spectra are rife with c, y, and internal ions, although some a, b, x, and z ions form. Many of the fragment ions were formed from cleavage adjacent to acidic residues, both N- and C-terminal to the acidic site. In addition, neutral loss (e.g., NH3, CH3, H2O, and CO2) was prevalent from both the parent ions and from fragment ions. These neutral eliminations were often indicative of specific amino acid residues. The fragmentation patterns from several charge states of the parent ions, when combined, provide significant primary sequence information. These results suggest that negative mode CID of multiply deprotonated ions provides useful structural information and can be worthwhile for highly acidic peptides that do not form positive ions in abundance

Rapid sea level rise in the aftermath of a Neoproterozoic snowball Earth

Earth’s most severe climate changes occurred during global-scale “snowball Earth” glaciations, which profoundly altered the planet’s atmosphere, oceans, and biosphere. Extreme rates of glacioeustatic sea level rise are predicted by the snowball Earth hypothesis, but supporting geologic evidence has been lacking. We use paleohydraulic analysis of wave ripples and tidal laminae in the Elatina Formation, Australia—deposited after the Marinoan glaciation ~635 million years ago—to show that water depths of 9 to 16 meters remained nearly constant for ~100 years throughout 27 meters of sediment accumulation. This accumulation rate was too great to have been accommodated by subsidence and instead indicates an extraordinarily rapid rate of sea level rise (0.2 to 0.27 meters per year). Our results substantiate a fundamental prediction of snowball Earth models of rapid deglaciation during the early transition to a supergreenhouse climate