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End of the Season Blues: Senescence and Reproductive Trade-Offs in Male Scorpions.
Insects
November 2024
Laboratorio de Biología Reproductiva y Evolución, Instituto de Diversidad y Ecología Animal (IDEA), CONICET-UNC, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba Av. Vélez Sarsfield 299, Córdoba X5000, Argentina.
Seasonal reproductive dynamics and senescence have profound impacts on male fertility, yet these processes remain understudied in scorpions. This study investigates how reproductive parameters-such as testicular mass, sperm quantity, and viability-change over the course of the reproductive season in males. We found that early-season males exhibited higher sperm quality and testicular mass compared to their older counterparts, suggesting that senescence, rather than reproductive effort, drives the decline in sperm viability.
View Article and Find Full Text PDFMetal-Organic Frameworks (MOFs)-Based Piezoelectric-Colorimetric Hybrid Sensor for Monitoring Green Leaf Volatiles.
ACS Sens
December 2024
The Department of Electrical Engineering and Computer Science, South Dakota State University, Brookings, South Dakota 57007, United States.
Article Synopsis
- Green leaf volatiles (GLVs) are chemical signals emitted by plants during insect attacks, highlighting the need for real-time detection methods that are both affordable and efficient.
- This study introduces a new sensor that utilizes a piezoelectric micro quartz tuning fork coated with a metal-organic framework hybrid material, allowing it to detect 1-hexanol (a common GLV) through both color change and frequency shift.
- The developed sensor demonstrates a detection range of 62.5 ppb to 250 ppm with high sensitivity, making it a promising tool for early detection of insect attacks and enhancing crop protection strategies.
Trace and Minor Element Analysis of Azurite Blues in Fine Arts: Possibilities and Limitations in Provenance Studies.
Appl Spectrosc
November 2024
Czech Geological Survey, Prague, Czech Republic.
Azurite, a historical blue mineral pigment, has previously been described to contain certain elemental impurities. These may originate from host rocks, vein fillings, or the primary copper ore mineralization. In this study, azurites (and also green malachites) from three important Central European deposits with a potential of being exploited for pigment usage already in the Middle Ages have been studied, together with azurite from Chessy, France, with a different geological setting.
View Article and Find Full Text PDFBioretention Cells Provide a 10-Fold Reduction in 6PPD-Quinone Mass Loadings to Receiving Waters: Evidence from a Field Experiment and Modeling.
Environ Sci Technol Lett
July 2023
Department of Civil Engineering, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.
Road runoff to streams and rivers exposes aquatic organisms to complex mixtures of chemical contaminants. In particular, the tire-derived chemical 6PPD-quinone (-(1,3-dimethylbutyl)-'-phenyl--phenylenediamine-quinone) is acutely toxic to several species of salmonids, which are critical to fisheries, ecosystems, and Indigenous cultures. We therefore urgently require interventions that can reduce loadings of 6PPD-quinone to salmonid habitats.
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