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Evolution of Human Pair Bonds as a Consequence of Male-Biased Mating Sex Ratios?
Bull Math Biol
January 2025
School of Mathematics and Statistics, The University of Sydney, Sydney, NSW, 2006, Australia.
Compared to our closest primate relatives, human life history involves greater longevity, which includes a distinctive postmenopausal life stage. Given mammalian reproductive physiology in which females build a finite stock of cells that can become oocytes early in life, which then continuously deplete mostly through cell death while males produce new sperm throughout adulthood, the postmenopausal stage makes the sex ratio in the fertile pool, called the adult sex ratio (ASR), male biased. Additionally, this affects a more fine-grained ratio, the operational sex ratio (OSR), defined as the ratio of males to females currently able to conceive.
View Article and Find Full Text PDFRejection of the concept of hemiurid genus Pulmovermis (Digenea: Hemiuridae) and other taxonomic propositions: new morphological and molecular data regarding Lecithochirium cyanovitellosum (Coil and Kuntz, 1960) Urabe and Sokolov, comb. nov. (formerly Pulmovermis cyanovitellosus).
Syst Parasitol
January 2025
A.N. Severtsov Institute of Ecology and Evolution RAS, Moscow, Russia.
Pulmovermis cyanovitellosus Coil and Kuntz, 1960 is a species of hemiurid trematode that localizes in the lung of sea snakes, an unusual trait for this group of parasites. Recent molecular phylogenetic studies based on 28S rRNA gene sequences have shown that this species is closely related to members of the genus Lecithochirium Lühe, 1901. This finding is unexpected given that Pulmovermis Coil and Kuntz, 1960 and Lecithochirium are currently classified in different subfamilies of Hemiuridae (Pulmoverminae Sandars, 1961 vs.
View Article and Find Full Text PDFVolatile Resistive Switching and Short-Term Synaptic Plasticity in a Ferroelectric-Modulated SrFeO Memristor.
ACS Appl Mater Interfaces
January 2025
Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China.
SrFeO (SFO) offers a topotactic phase transformation between an insulating brownmillerite SrFeO (BM-SFO) phase and a conductive perovskite SrFeO (PV-SFO) phase, making it a competitive candidate for use in resistive memory and neuromorphic computing. However, most of existing SFO-based memristors are nonvolatile devices which struggle to achieve short-term synaptic plasticity (STP). To address this issue and realize STP, we propose to leverage ferroelectric polarization to effectively draw ions across the interface so that the PV-SFO conductive filaments (CFs) can be ruptured in absence of an external field.
View Article and Find Full Text PDFChallenges and complications in arthroscopic ankle ligament repair: Current concepts.
J Clin Orthop Trauma
March 2025
Hospital Britanico de Buenos Aires, Perdriel 74, C1280AEB, Argentina.
Arthroscopic ligament repair has gained popularity as a minimally invasive alternative for addressing ankle instability, due to its minimally invasive nature, which offers significant advantages over traditional open procedures. These benefits include smaller incisions, reduced soft tissue dissection, and the ability to concurrently manage intra-articular pathology, contributing to its popularity among surgeons and patients alike. Despite these advantages, the procedure presents a range of technical challenges and potential complications that can impact patient outcomes.
View Article and Find Full Text PDFDietary variety score and risk of metabolic syndrome incidence: Tehran Lipid and Glucose Study.
BMJ Nutr Prev Health
August 2024
Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Purpose: There are contradictions in the association between dietary variety and metabolic syndrome (MetS). The concept of dietary variety should be merged with other dietary recommendations including diet quality and proportion. We aimed to investigate the association of the healthy food diversity index with MetS and its components in Iranian adults.
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