Scalable and Consolidated Microbial Platform for Rare Earth Element Leaching and Recovery from Waste Sources

Chemical methods for the extraction and refinement of technologically critical rare earth elements (REEs) are energy-intensive, hazardous, and environmentally destructive. Current biobased extraction systems rely on extremophilic organisms and generate many of the same detrimental effects as chemical methodologies. The mesophilic methylotrophic bacterium Methylobacterium extorquens AM1 was previously shown to grow using electronic waste by naturally acquiring REEs to power methanol metabolism. Here we show that growth using electronic waste as a sole REE source is scalable up to 10 L with consistent metal yields without the use of harsh acids or high temperatures. The addition of organic acids increases REE leaching in a nonspecific manner. REE-specific bioleaching can be engineered through the overproduction of REE-binding ligands (called lanthanophores) and pyrroloquinoline quinone. REE bioaccumulation increases with the leachate concentration and is highly specific. REEs are stored intracellularly in polyphosphate granules, and genetic engineering to eliminate exopolyphosphatase activity increases metal accumulation, confirming the link between phosphate metabolism and biological REE use. Finally, we report the innate ability of M. extorquens to grow using other complex REE sources, including pulverized smartphones, demonstrating the flexibility and potential for use as a recovery platform for these critical metals.

Biosynthesis of Isonitrile- and Alkyne-Containing Natural Products

Natural products are a diverse class of biologically produced compounds that participate in fundamental biological processes such as cell signaling, nutrient acquisition, and interference competition. Unique triple-bond functionalities like isonitriles and alkynes often drive bioactivity and may serve as indicators of novel chemical logic and enzymatic machinery. Yet, the biosynthetic underpinnings of these groups remain only partially understood, constraining the opportunity to rationally engineer biomolecules with these functionalities for applications in pharmaceuticals, bioorthogonal chemistry, and other value-added chemical processes. Here, we focus our review on characterized biosynthetic pathways for isonitrile and alkyne functionalities, their bioorthogonal transformations, and prospects for engineering their biosynthetic machinery for biotechnological applications.

Launching a saliva-based SARS-CoV-2 surveillance testing program on a university campus

Regular surveillance testing of asymptomatic individuals for SARS-CoV-2 has been center to SARS-CoV-2 outbreak prevention on college and university campuses. Here we describe the voluntary saliva testing program instituted at the University of California, Berkeley during an early period of the SARS-CoV-2 pandemic in 2020. The program was administered as a research study ahead of clinical implementation, enabling us to launch surveillance testing while continuing to optimize the assay. Results of both the testing protocol itself and the study participants' experience show how the program succeeded in providing routine, robust testing capable of contributing to outbreak prevention within a campus community and offer strategies for encouraging participation and a sense of civic responsibility.

Bacterial endosymbionts influence host sexuality and reveal reproductive genes of early divergent fungi

Many heritable mutualisms, in which beneficial symbionts are transmitted vertically between host generations, originate as antagonisms with parasite dispersal constrained by the host. Only after the parasite gains control over its transmission is the symbiosis expected to transition from antagonism to mutualism. Here, we explore this prediction in the mutualism between the fungus Rhizopus microsporus (Rm, Mucoromycotina) and a beta-proteobacterium Burkholderia, which controls host asexual reproduction. We show that reproductive addiction of Rm to endobacteria extends to mating, and is mediated by the symbiont gaining transcriptional control of the fungal ras2 gene, which encodes a GTPase central to fungal reproductive development. We also discover candidate G-protein-coupled receptors for the perception of trisporic acids, mating pheromones unique to Mucoromycotina. Our results demonstrate that regulating host asexual proliferation and modifying its sexual reproduction are sufficient for the symbiont's control of its own transmission, needed for antagonism-to-mutualism transition in heritable symbioses. These properties establish the Rm-Burkholderia symbiosis as a powerful system for identifying reproductive genes in Mucoromycotina.

Changing patterns of inpatient care for children and adolescents at the Menninger Clinic, 1988-1994

The authors describe trends in inpatient psychiatric length of stay (LOS) and admissions for the population of children and adolescents (N = 784) at the Menninger Clinic from 1988 to 1994. During this period. median LOS declined dramatically from 7 months to 3 weeks, whereas admissions increased 4-fold. The diagnostic case mix changed substantially, with a crossover in modal principal diagnosis from personality disorder to affective disorder. Use of medications became almost universal. Diagnosis and medication use became less important determinants of LOS over time. The practical implications of these patterns include higher patient turnover, fewer inpatient clinical contact hours, and heightened importance of continuity with outpatient care. Research should center on the impact of declining LOS on clinical and functional outcomes for children and adolescents.

Changing patterns of inpatient care for children and adolescents at the Menninger Clinic, 1988-1994

The authors describe trends in inpatient psychiatric length of stay (LOS) and admissions for the population of children and adolescents (N = 784) at the Menninger Clinic from 1988 to 1994. During this period. median LOS declined dramatically from 7 months to 3 weeks, whereas admissions increased 4-fold. The diagnostic case mix changed substantially, with a crossover in modal principal diagnosis from personality disorder to affective disorder. Use of medications became almost universal. Diagnosis and medication use became less important determinants of LOS over time. The practical implications of these patterns include higher patient turnover, fewer inpatient clinical contact hours, and heightened importance of continuity with outpatient care. Research should center on the impact of declining LOS on clinical and functional outcomes for children and adolescents.

Effectiveness of intensive short-term residential treatment with severely disturbed adolescents

Analysis of follow-up data on 123 adolescents treated over a four-year period indicates that intensive short-term residential treatment that includes emphasis on work with families, involvement in community activities, and discharge planning can be an effective means of helping youngsters with severe psychiatric disorders who have not responded to briefer or less intensive forms of psychiatric treatment.

Child abuse and treatment difficulty in inpatient treatment of children and adolescents

This study examined the associations between abuse and staff perceived treatment difficulty in sixty-nine hospitalized children and adolescents. Subjects were rated on a treatment difficulty scale, and clinical charts were reviewed for evidence of physical abuse, sexual abuse, abuse between parents, and parental history of abuse. Subjects with histories of abuse were not rated as more difficult or less responsive to treatment than other patients. Physically abused youngsters were rated as more self-destructive and more accessible to treatment than non-abused children, while sexually abused youngsters were self-destructive and demanding, and their families were seen as more distant and unavailable.