The fascinating shapes and hierarchical designs of biomineralized structures are an inspiration to materials scientists because of the potential they suggest for biomolecular control over materials synthesis. Conversely, the failure to prevent or limit tissue mineralization in the vascular, skeletal, and urinary systems is a common source of disease. Understanding the mechanisms by which organisms direct or limit crystallization has long been a central challenge to the biomineralization community. One prevailing view is that mineral-associated macromolecules are responsible for either inhibiting crystallization or initiating and stabilizing non-equilibrium crystal polymorphs and morphologies through interactions between anionic moieties and cations in solution or at mineralizing surfaces. In particular, biomolecules that present carboxyl groups to the growing crystal have been implicated as primary modulators of growth. Here we review the results from a combination of in situ atomic force microscopy (AFM) and molecular modeling (MM) studies to investigate the effect of specific interactions between carboxylate-rich biomolecules and atomic steps on crystal surfaces during the growth of carbonates, oxalates and phosphates of calcium. Specifically, we how the growth kinetics and morphology depend on the concentration of additives that include citrate, simple amino acids, synthetic Asp-rich polypeptides, and naturally occurring Asp-rich proteins found in both …

Interview with postmaster and Army veteran J.D. Bradley. The interview includes Bradley's personal experiences about being a guard during the International Military Tribunal for the Far East in Tokyo after World War II, enlisting in the army, basic training, various assignments, guard duty in the court docks during the tribunal, and guarding Hideki Tojo. Bradley talks about rules and regulations for Military Police guards, steps taken to prevent suicides among the prisoners, the physical description of the interior of the courtroom of the War Ministry Building, checks for hidden weapons in the courtroom, courtroom procedures, various security procedures, steps taken to impress the Japanese people, living quarters and conditions at the War Ministry Building, relations with Japanese civilians, black market activities, his relationship with a Japanese correspondent and trading cigarettes for photographs of the proceedings, Sugamo Prison, and his commanding officer, Lt. Col. Aubrey S. Kenworthy. The interview includes an appendix with photographs.

Interview with aircraft worker Ivan Bounds. The interview includes Bounds' personal experiences as a longtime resident of Denton County, Texas from 1926-2002.

Report by the OTA staff development group at the Wye retreat.

A topical, alphabetically arranged index to volumes 13-25 including experiment station records, publications reviewed, and foreign publications. In has a 'Consolidated Table of Contents' which lists all editorial notes and publications of the experiment stations and Department of Agriculture from the referenced volumes

Report submitted by the Texas Parks and Wildlife Department to the Texas 86th regular legislature requesting appropriations to fund programming and activities. It includes an overview of the institution's goals, summaries of appropriations requests for fiscal years 2020 and 2021, and supporting documentation.