19,881 results match your criteria: "CA 94720 USA; Joint Center for Artificial Photosynthesis[Affiliation]"

Intracellular bacterial pathogens are distinctive tools for fighting cancer, as they can proliferate in tumors and deliver therapeutic payloads to the eukaryotic cytosol. Cytosol-dwelling bacteria have undergone extensive preclinical and clinical testing, yet the mechanisms of activating innate immunity in tumors are unclear. We report that phylogenetically distinct cytosolic pathogens, including , , and species, elicited anti-tumor responses in poorly immunogenic melanoma and lymphoma in mice.

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Recent reports of room-temperature, ambient pressure superconductivity in copper-substituted lead phosphate apatite, commonly referred to as LK99, have prompted numerous theoretical and experimental studies into its properties. As the electron-phonon interaction is a common mechanism for superconductivity, the electron-phonon coupling strength is an important quantity to compute for LK99. In this work, we compare the electron-phonon coupling strength among the proposed compositions of LK99.

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Article Synopsis
  • Manipulating fluid flow is crucial for advances in microfluidics, nanoengineering, and biomedicine, and can help address the global energy crisis by achieving zero-drag hydrodynamics.
  • The research tackles challenges posed by the D'Alembert paradox and unresolved Navier-Stokes equations, introducing a new type of hydrodynamic cloak that operates with isotropic and homogeneous viscosity.
  • Key findings highlight the importance of controlling vorticity for achieving zero-drag and hydrodynamic cloaking, challenging the notion that zero drag is impossible and offering insights beneficial for various technologies, including drug delivery systems.
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Undernutrition and antibody response to measles, tetanus and Haemophilus Influenzae type b (Hib) vaccination in pre-school south African children: The VHEMBE birth cohort study.

Vaccine

December 2024

Department of Epidemiology, Biostatistics and Occupational Health, School of Population and Global Health, Faculty of Medicine and Health Sciences, McGill University, Montreal, Quebec, Canada.

Background: Under-vaccination is undoubtedly driving recent worldwide measles outbreaks, but undernutrition may also be playing a role in low- and middle-income countries. Studies have shown reduced immune response to vaccines in undernourished children but few have followed children beyond infancy, when they are more likely to be exposed to infectious diseases.

Methods: In the Venda Health Examination of Mothers, Babies and the Environment (VHEMBE) South African birth cohort study, we examined the relationship between undernutrition, as measured by stunting and other growth measures, and vaccine-specific serum antibody level to three different vaccine types: measles, tetanus and Haemophilus influenzae type b (Hib).

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Considerable attention has been directed to studying the infection dynamics of the fungal pathogen Batrachochytrium dendrobatidis (Bd) affecting amphibians in the high elevations of the Neotropics. However, lowland forests of the same realm remain comparatively understudied in this context. Herein, we attempt to bridge this gap by measuring the prevalence of Bd via quantitative polymerase chain reaction (qPCR) in several anuran taxa inhabiting the Amazonian lowlands in the northeast of Ecuador.

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Rapid Sex Chromosome Turnover in African Clawed Frogs (Xenopus) and the Origins of New Sex Chromosomes.

Mol Biol Evol

December 2024

UMR 7179, Mécanismes Adaptatifs et Evolution, Muséum national d'Histoire naturelle CNRS, Paris, France.

Sex chromosomes of some closely related species are not homologous, and sex chromosome turnover is often attributed to mechanisms that involve linkage to or recombination arrest around sex-determining loci. We examined sex chromosome turnover and recombination landscapes in African clawed frogs (genus Xenopus) with reduced representation genome sequences from 929 individuals from 19 species. We recovered extensive variation in sex chromosomes, including at least eight nonhomologous sex-associated regions-five newly reported here, with most maintaining female heterogamety, but two independent origins of Y chromosomes.

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A method is presented for high-precision chemical detection that integrates quantum sensing with droplet microfluidics. Using nanodiamonds (ND) with fluorescent nitrogen-vacancy (NV) centers as quantum sensors, rapidly flowing microdroplets containing analyte molecules are analyzed. A noise-suppressed mode of optically detected magnetic resonance is enabled by pairing controllable flow with microwave control of NV electronic spins, to detect analyte-induced signals of a few hundredths of a percent of the ND fluorescence.

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Public attitudes on performance for algorithmic and human decision-makers.

PNAS Nexus

December 2024

Technology and Operations Management Unit, Harvard Business School, Soldiers Field, Boston, MA 02163, USA.

This study explores public preferences for algorithmic and human decision-makers (DMs) in high-stakes contexts, how these preferences are shaped by performance metrics, and whether public evaluations of performance differ depending on the type of DM. Leveraging a conjoint experimental design, approximately respondents chose between pairs of DM profiles in two high-stakes scenarios: pretrial release decisions and bank loan approvals. The profiles varied by type (human vs.

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Specialized or secondary metabolites are small molecules of biological origin, often showing potent biological activities with applications in agriculture, engineering and medicine. Usually, the biosynthesis of these natural products is governed by sets of co-regulated and physically clustered genes known as biosynthetic gene clusters (BGCs). To share information about BGCs in a standardized and machine-readable way, the Minimum Information about a Biosynthetic Gene cluster (MIBiG) data standard and repository was initiated in 2015.

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The projected sensitivity of the effective electron neutrino-mass measurement with the KATRIN experiment is below 0.3 eV (90 % CL) after 5 years of data acquisition. The sensitivity is affected by the increased rate of the background electrons from KATRIN's main spectrometer.

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Species-specific responses to di (2-ethylhexyl) phthalate reveal activation of defense signaling pathways in California sea lion but not in human skeletal muscle cells in primary culture.

Comp Biochem Physiol C Toxicol Pharmacol

December 2024

Centro de Investigaciones Biológicas del Noroeste S.C., Planeación Ambiental y Conservación, Instituto Politécnico Nacional 195, Col. Playa Palo Santa Rita Sur, C.P. 23096, La Paz, Baja California Sur, Mexico. Electronic address:

Higher antioxidant defenses in marine than terrestrial mammals allow them to cope with oxidative stress associated with diving-induced ischemia/reperfusion. Does this adaptation translate to inherent resistance to other stressors? We analyzed oxidative stress indicators in cells derived from human and California sea lion (Zalophus californianus) skeletal muscle upon exposure to di (2-ethylhexyl) phthalate (DEHP). Human abdominal muscle biopsies were collected from healthy women undergoing planned cesarean surgery.

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Reactive oxygen species control protein degradation at the mitochondrial import gate.

Mol Cell

December 2024

Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, CA 94720, USA; Howard Hughes Medical Institute, University of California at Berkeley, Berkeley, CA, USA; California Institute for Quantitative Biosciences (QB3), University of California at Berkeley, Berkeley, CA 94720, USA. Electronic address:

While reactive oxygen species (ROS) have long been known to drive aging and neurodegeneration, their persistent depletion below basal levels also disrupts organismal function. Cells counteract loss of basal ROS via the reductive stress response, but the identity and biochemical activity of ROS sensed by this pathway remain unknown. Here, we show that the central enzyme of the reductive stress response, the E3 ligase Cullin 2-FEM1 homolog B (CUL2), specifically acts at mitochondrial TOM complexes, where it senses ROS produced by complex III of the electron transport chain (ETC).

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Advances in acid-degradable and enzyme-cleavable linkers for drug delivery.

Curr Opin Chem Biol

December 2024

Department of Bioengineering and Innovative Genomics Institute, University of California Berkeley, 2151 Berkeley Way, Berkeley, CA 94720, USA. Electronic address:

Article Synopsis
  • Drug delivery vectors enhance the effectiveness of therapies such as small molecules and nucleic acid drugs but face challenges in releasing therapeutic cargo in specific conditions.
  • Recent advancements focus on creating acid-degradable and enzyme-cleavable linkages for better performance in endolysosomal release.
  • Key innovations include stable azido-acetal linkers, organocatalytic methods for making asymmetric ketals, and linkers activated by enzymes like cathepsin B and β-galactosidase for improved drug delivery.
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Structure and Methyl-lysine Binding Selectivity of the HUSH Complex Subunit MPP8.

J Mol Biol

January 2025

Molecular Immunity Unit, Department of Medicine, University of Cambridge, MRC Laboratory of Molecular Biology, Cambridge CB2 0QH, UK; Cambridge Institute of Therapeutic Immunology & Infectious Disease (CITIID), Department of Medicine, University of Cambridge, Cambridge CB2 0AW, UK. Electronic address:

The Human Silencing Hub (HUSH) guards the genome from the pathogenic effects of retroelement expression. Composed of MPP8, TASOR, and Periphilin-1, HUSH recognizes actively transcribed retrotransposed sequences by the presence of long (>1.5-kb) nascent transcripts without introns.

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Iridium (Ir) is the most active and durable anode catalyst for the oxygen evolution reaction (OER) for proton exchange membrane water electrolyzers (PEMWEs). However, their large-scale applications are hindered by high costs and scarcity of Ir. Lowering Ir loadings below 1.

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The family-level placement of the species Pacificana cockayniHogg, 1904 (Araneae, Miturgidae) has been ambiguous for over a century, with the monotypic genus Pacificana initially placed in Agelenidae, later transferred to Amaurobioidinae (Anyphaenidae), and presently in Miturgidae. A recent work describing the male and molecular data consisting of a single mitochondrial gene, cytochrome c oxidase subunit I, confirmed that the species is part of the marronoid clade; however, these data did not result in a conclusive family-level placement. Here, we use low-coverage whole genome sequencing (lcWGS) combined with data from the Sequence Read Archive to infer a phylogeny from ultraconserved elements (UCEs) and six legacy Sanger loci.

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An orphan gene BOOSTER enhances photosynthetic efficiency and plant productivity.

Dev Cell

December 2024

Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA.

Article Synopsis
  • The text discusses how transferring DNA from organelles to the nucleus is crucial for the evolution of eukaryotes, highlighted by a study that identified a specific gene (BSTR) linked to photosynthesis in Populus trichocarpa.
  • BSTR has three exons, with two derived from endophytic sources and one including a large part of a plastid gene related to Rubisco, which is essential for photosynthesis.
  • Overexpressing BSTR in poplar and Arabidopsis plants led to significant increases in plant height (up to 200%) and biomass (up to 200%), demonstrating its potential for enhancing growth under field conditions.
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biopesticide overcomes insecticide resistance in malaria vector mosquitoes.

Sci Adv

December 2024

W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA.

Vector mosquito control is an integral part of malaria control. The global emergence of insecticide resistance in malaria-transmitting has become an impediment and has created an urgent need for novel mosquito control approaches. Here, we show that a biopesticide derived from the soil-dwelling bacterium sp.

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Article Synopsis
  • Encapsulation of materials in nanotubes is a key technique in nanotechnology that creates unique one-dimensional (1D) structures with enhanced functionality.
  • Materials trapped inside nanotubes can form low-dimensional polymorphs that have different electrical, optical, and magnetic properties than their bulk counterparts.
  • Recent advancements in this field involve various materials like organic molecules and metal compounds, as well as a focus on how geometrical confinement within nanotubes influences their atomic structure and potential applications in electronics and energy storage.
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Article Synopsis
  • Floral traits like flower size and nectar/pollen rewards are crucial for attracting pollinators, but these traits can vary due to environmental factors and soil conditions.
  • Research shows that diverse arbuscular mycorrhizal fungi (AMF) can improve floral displays and rewards, leading to increased bee visitation, as larger flowers attract more bees.
  • However, there's a trade-off, as enhanced flower size from AMF may reduce root colonization, indicating that soil microbial interactions significantly influence both plant traits and pollinator behavior.
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Globally, care experiences of the growing population of contraceptive users are not well-understood. We leverage a large client dataset (n = 71,602) from three countries (Burkina Faso, Pakistan, and Tanzania) to characterize contraceptive services sought (visit objective and method preference), assess whether these visit objectives were met and for whom, and explore if visit objective fulfillment was associated with care quality. Most people in all three countries said they were seeking to continue their current method or adopt a method for the first time.

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Efficient light generation from triplet states of organic molecules has been a hot yet demanding topic in academia and the display industry. Herein, we propose a strategy for developing triplet emitter by creating heterostructures of organic chromophores and transition metal dichalcogenides (TMDs). These heterostructures emit microsecond phosphorescence at room temperature, while their organic chromophores intrinsically exhibit millisecond phosphorescence under vibration dissipation-free conditions.

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Burning gig, rewarding risk: Effects of dual exposure to incentive structure and heat condition on risky driving among on-demand food-delivery motorcyclists in Kaohsiung, Taiwan.

Accid Anal Prev

February 2025

Department of City and Regional Planning and Institute of Transportation Studies, University of California, Berkeley, CA 94720, USA. Electronic address:

The gig economy, characterized by short-term, task-based work facilitated via digital platforms, has raised various occupational safety concerns, including road safety risks and heat exposure faced by on-demand food delivery (ODFD) workers. Often using open modes of transportation, such as motorcycles and bicycles, these workers have minimal physical protection and direct environmental exposure while working long hours on the road, interacting with larger vehicles. Prior research has suggested that their road risks result from prevalent risky driving incentivized by platform-established business models, but quantitative evidence is lacking.

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Topological surface states of semimetal TaSb.

Nano Converg

December 2024

Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.

Topological surface states, protected by the global symmetry of the materials, are the keys to understanding various novel electrical, magnetic, and optical properties. TaSb is a newly discovered topological material with unique transport phenomena, including negative magnetoresistance and resistivity plateau, whose microscopic understanding is yet to be reached. In this study, we investigate the electronic band structure of TaSb using angle-resolved photoemission spectroscopy and density functional theory.

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Glycerol improves the viability of a cryopreserved choanoflagellate.

Cryobiology

December 2024

Howard Hughes Medical Institute and the Department of Molecular and Cell Biology, University of California, Berkeley, CA, 94720, USA. Electronic address:

The colonial choanoflagellate Salpingoeca rosetta is a tractable model system for studying the origins of multicellularity, but long-term storage strategies for this species have not been tested. In this study, we probed each stage of cryopreservation (cooling, long-term storage, recovery) to identify the optimal protocol for recovery of S. rosetta and co-cultured bacterial cells.

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