University of California, Riverside

Transforming Cyclic Allenes into Precision Macromolecular Building Blocks

Abstract Ring-opening allene metathesis polymerization (ROAlMP) provides direct access to polyallenamers containing reactive allene functionality within the polymer backbone, yet achieving controlled polymerization has remained a major challenge. Here, we report an additive-assis...

Dormancy type, seed traits, and species identity shape seed‐associated fungal community composition in tropical pioneer trees

Seed germination is regulated in many plants by seed dormancy, while postdispersal survival is often determined by soilborne fungi that infect seeds. In tropical forests, seeds in each of three dormancy types (physical, physiologically dormant, or quiescent) often share similar p...

The Evolution of Low-ionization Electron Densities in Galaxies across Cosmic Epochs

Abstract We investigate the low-ionization electron density in the interstellar medium (ISM) of galaxies across 0 < z < 8, derived with the [O ii ] λλ 3727, 3730 and [S ii ] λλ 6718, 6733 doublets, using both deep JWST/NIRCam/grism and NIRSpec/MSA spectroscopy. Along with ancilla...

Evaluating the roles of testosterone and sex-linked genes in territorial aggression of sex-reversed XY females in the African pygmy mouse

Sex differences in social aggression are widespread across the animal kingdom, with males typic-ally displaying greater territoriality. While this dimorphism has traditionally been attributed to sex hormones, sex chromosomes can also contribute to it independently of hormonal inf...

Multicomponent PFCAs Capture, Detection, Differentiation, and Aqueous-Phase Removal with Adaptive Luminescent Organic Cages

Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are persistent, nonbiodegradable pollutants that accumulate in water, posing threats to human health and aqueous ecosystems. There is currently a need for technologies capable of both multicomponent detection and removal of PFA...

Sexual Orientation and Gender Identity Data and HIV Preexposure Prophylaxis Disparity Detection

Importance US federal reporting changes in 2025 removed sexual orientation and gender identity (SOGI) measures from health-center reporting, raising concerns about equity surveillance. Objective To quantify how incomplete or absent SOGI data are associated with detection of dispa...

Community composition drives metabolic competition and Staphylococcus aureus colonization resistance in synthetic nasal communities

Abstract The human nasal microbiome is a low-diversity ecosystem whose assembly principles and mechanisms of colonization resistance remain poorly understood. Staphylococcus aureus is a member of the nasal microbiome of some individuals with variable abundance. We hypothesized th...

Morphological adaptations of cervical vertebrae in plunge‐diving sulids

Abstract Foraging strategy frequently drives morphological diversification in birds. The plunge‐diving behavior of certain species makes the functional and ecological trade‐offs of variation in cervical vertebrae an especially intriguing question. This study compares cervical ver...

Microbial Degradation of Lignin Generates Iron-Binding Organic Ligands

Abstract The association of organic carbon (OC) with iron (Fe) minerals is a primary mechanism governing soil OC persistence, yet the molecular agents mediating Fe–OC binding remain poorly defined. In this study, we demonstrated that microbial degradation of lignin, one of the ma...

Histological and Biomechanical Considerations of Donor Costal Cartilage Allografts for Total Ear Reconstruction

ObjectiveDonor costal cartilage (DCC) allografts for microtia reconstruction have shown promising clinical results, but characterization of the allografts' intrinsic properties has yet to be performed.DesignHistologically, DCC allografts were compared to autologous costal cartila...

Synthetic DNA Tracers Enable Ultra-High-Reproducibility Characterization of Aquifer Hydraulic Conductivity and Contaminant Transport

Abstract Reliable characterization of aquifer hydraulic conductivity (K) via tracer-based methods remains a major challenge due to environmental background noise. We report that synthetic DNA tracers, free of background-noise interference, enable highly reproducible tomographic i...

Minimal-actuation feather star–inspired soft swimmers for multimodal 3D maneuverability

Complex, three-dimensional (3D) motions typically require actuator arrays and complex control architectures. Here, we present a feather star–inspired soft robotic swimmer that uses only two pneumatic inputs to produce three distinct and switchable swimming modes: jellyfish-like p...

Nitrate Removal and Geogenic Contaminant Mobilization during Oxic–Anoxic Cycling of Managed Aquifer Recharge Basin Soils

Abstract More frequent and intense precipitation events challenge water capture and recharge. Managed aquifer recharge (MAR) diverts excess surface water into aquifers to secure groundwater supplies; when using nonconventional waters such as stormwater, elevated nitrate loads can...

Early Life Adversity and Prosocial Behavior in Adolescence: The Mediating Role of Childhood Empathy

ABSTRACT Introduction Extensive evidence demonstrates that early life adversity (ELA) has enduring contributions to psychological and physical problems, yet little research has examined how ELA may potentially influence positive adaptation. In this longitudinal, multi‐method stud...

Perceptions of Safety and Fear of Seeking Emergency Care After 2025 Anti-Immigrant Policies

This cross-sectional study examines safety concerns and fear of seeking emergency care among English- and Spanish-speaking Latino patients following implementation of immigration policy changes in 2025.

Promoting aluminum nanoparticle ejection from HTPB via exothermic polymer-bound mesoparticles

The incorporation and subsequent ejection of aluminum nanoparticles (nAl) from hydroxyl‑terminated polybutadiene (HTPB) remains a significant challenge due to the high specific surface area of nAl and strong interfacial interactions with the polymer matrix. We demonstrate that on...

Evaluating Glanceable Multi-Device Family Health Tracking with Smartwatches and Home Displays

While ubiquitous computing research has explored diverse devices for personal health tracking, we know less about multi-device designs for family informatics, where health management is inherently collaborative. To understand how families adopt and perceive ubiquitous access to s...

Reduced Longwave Absorption of Magnesium Sulfate Aerosol as an Alternative to Sulfuric Acid for Stratospheric Aerosol Injection

Abstract Aqueous sulfuric acid is the benchmark sulfate aerosol for stratospheric aerosol injection (SAI), but /O aerosol absorbs strongly in the infrared, producing longwave warming that significantly offsets its shortwave cooling. Here, we evaluate magnesium sulfate () as a non...

Multi-Chamber Dynamic Molecular Crystal Microcapsules for Payload Encapsulation and Controlled Release

Abstract Crystalline self-assembly offers a powerful route to ordered organic materials with well-defined structures and morphologies. Despite substantial advances in controlling crystal habit, organic single crystals with precisely engineered architectures, particularly those wi...

Disclosure of HIV Positive Status and Network Characteristics Among a Cohort of People Living with HIV in Western Kenya

Disclosure of HIV serostatus is critical in managing the health and well-being of people living with HIV/AIDS (PLWHA), yet the decision to disclose is shaped by complex interpersonal and contextual factors. The purpose of this study was to examine patterns of HIV status disclosur...