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Multifunctional metabolites of Streptomyces kunmingensis BS19 from bamboo rhizosphere soil.
Int Microbiol
November 2024
Department of Microbiology, Periyar University, Salem, Tamil Nadu, India.
Article Synopsis
- A bioactive yellow-red pigment from *Streptomyces kunmingensis* was isolated and characterized, showing strong anti-infective properties against MRSA and Mycobacterium tuberculosis.
- The pigment, a chromopeptide with a specific chemical formula, was identified using various spectral analyses and exhibited antibacterial effects against Staphylococcus aureus as well as antiproliferative effects on 14 human cancer cell lines.
- Additionally, it demonstrated effective wound-healing properties in a rat model, highlighting its potential for antimicrobial, wound-healing, and anticancer applications.
Divergent bleaching and recovery trajectories in reef-building corals following a decade of successive marine heatwaves.
Proc Natl Acad Sci U S A
December 2023
Department of Biology, University of Pennsylvania, Philadelphia, PA 19104.
Increasingly frequent marine heatwaves are devastating coral reefs. Corals that survive these extreme events must rapidly recover if they are to withstand subsequent events, and long-term survival in the face of rising ocean temperatures may hinge on recovery capacity and acclimatory gains in heat tolerance over an individual's lifespan. To better understand coral recovery trajectories in the face of successive marine heatwaves, we monitored the responses of bleaching-susceptible and bleaching-resistant individuals of two dominant coral species in Hawai'i, and , over a decade that included three marine heatwaves.
View Article and Find Full Text PDFExposure to ultraviolet-B radiation increases the susceptibility of mosquitoes to infection with dengue virus.
Glob Chang Biol
October 2023
School of Biological Sciences, Monash University, Melbourne, Victoria, Australia.
By 2100, greenhouse gases are predicted to reduce ozone and cloud cover over the tropics causing increased exposure of organisms to harmful ultraviolet-B radiation (UVBR). UVBR damages DNA and is an important modulator of immune function and disease susceptibility in humans and other vertebrates. The effect of UVBR on invertebrate immune function is largely unknown, but UVBR together with ultraviolet-A radiation impairs an insect immune response that utilizes melanin, a pigment that also protects against UVBR-induced DNA damage.
View Article and Find Full Text PDFAddition of dissolved inorganic carbon stimulates snow algae primary productivity on glacially eroded carbonate bedrock in the Medicine Bow Mountains, WY, USA.
FEMS Microbiol Ecol
June 2023
Department of Plant and Microbial Biology, University of Minnesota, St. Paul, MN 55108, USA.
Snow is a critical component of the Earth system. High-elevation snow can persist into the spring, summer, and early fall and hosts a diverse array of life, including snow algae. Due in part to the presence of pigments, snow algae lower albedo and accelerate snow melt, which has led to increasing interest in identifying and quantifying the environmental factors that constrain their distribution.
View Article and Find Full Text PDFA Case of Linear Scleroderma in a Young Child: A Diagnosis Easily Missed in Primary Care.
Am J Case Rep
May 2023
Department of Pediatrics, Faculty of Medicine, Universiti Teknologi MARA, Sungai Buloh, Selangor, Malaysia.
BACKGROUND This case illustrates the challenges in diagnosing linear scleroderma (LS) in a child who presented to a primary care setting. Diagnosis of LS is easily missed due to the lack of prominent symptoms, subtle visible skin changes, and under-recognition of this condition. CASE REPORT A 7-year-old boy presented with a linear, painless, non-itchy rash at the center of his forehead, which has been present for 6 months.
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