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The strong correlation between reproductive life cycle type and chromosome numbers in green plants has been a long-standing mystery in evolutionary biology. Within green plants, the derived condition of heterosporous reproduction has emerged from the ancestral condition of homospory in disparate locations on the phylogenetic tree at least 11 times, of which three lineages are extant. In all green plant lineages where heterospory has emerged, there has been a significant downsizing in chromosome numbers.
View Article and Find Full Text PDFExploring Barriers and Bridging Gaps: Perspectives of Nurses, Midwives, and Lady Health Workers in the Implementation of Emergency Obstetric Care.
Pak J Med Sci
January 2025
Prof. Dr. Shehla Noor, Department of obstetrics & Gynaecology, Ayyub Medical College, Abbottabad, Pakistan.
Background & Objectives: Maternal mortality is a global concern primarily due to preventable obstetric complications. Challenges in implementing Emergency Obstetric Care (EmOC) in developing nations hinder effective reduction of these deaths. Our objective was to identify key challenges in EmOC practices among frontline healthcare providers, assess the severity and frequency of these barriers, and evaluate gaps in resources, training, and institutional support needed for effective resolution.
View Article and Find Full Text PDF"Do all bisexuals have this power?": An exploratory study of "crippling nicotine addiction," identity, and other emergent themes in vaping messages on QueerTok.
SSM Qual Res Health
December 2024
Department of Health Promotion, Education, and Behavior, University of South Carolina, Columbia, SC, USA.
Nicotine and tobacco use disproportionally affects sexual and gender minority (SGM) populations in the United States. Social media narratives may contribute to these disparities. This qualitative study delineated perceptions and experiences depicted in SGM-related videos about nicotine vaping on TikTok.
View Article and Find Full Text PDFAcute lymphoblastic leukemia (ALL) is the most common childhood cancer, with Hispanic/Latino children having a higher incidence of ALL than other racial/ethnic groups. Genetic variants, particularly ones found enriched in Indigenous American (IA)-like ancestry and inherited by Hispanics/Latinos, may contribute to this disparity. In this study, we characterized the impact of IA-like ancestry on overall ALL risk and the frequency and effect size of known risk alleles in a large cohort of self-reported Hispanic/Latino individuals.
View Article and Find Full Text PDFElucidating the genetic contributions to Parkinson's disease (PD) etiology across diverse ancestries is a critical priority for the development of targeted therapies in a global context. We conducted the largest sequencing characterization of potentially disease-causing, protein-altering and splicing mutations in 710 cases and 11,827 controls from genetically predicted African or African admixed ancestries. We explored copy number variants (CNVs) and runs of homozygosity (ROHs) in prioritized early onset and familial cases.
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