The Clinical and Metabolic Profiles in Menstrual Changes Among Reproductive-Aged Women Post-COVID-19.

Menstruation is a key indicator of female reproductive health, yet clinical features and underlying mechanisms associated with menstrual changes following the coronavirus disease 2019 (COVID-19) infection remain unclear. Here, we recruited 253 participants through questionnaires, and 73 individuals underwent metabolomic analysis of blood serum. Over 60% reported menstrual changes, primarily experiencing longer cycle and lighter bleeding, which were significantly associated with age, general medical conditions, perceived stress, anxiety scores, and depression scores, as well as COVID-19 symptoms including fatigue and headache.

Synergistic Regulation of Combustion Behavior and Safety Characteristics of Graphene Modified Core-Shell Al@AP Composites.

Improving the energy release and safety of composite solid propellants is a key focus in energetic materials research. Graphene, with its excellent thermal conductivity and lubrication properties, is a promising additive. In this study, Al@AP core-shell particles doped with graphene were prepared via an in-situ deposition method.

Improvement of the Thermal Decomposition of Ammonium Perchlorate and Combustion of Aluminum Powder by Dual Core-Shell Ammonium Perchlorate-Based Composites Based on Self-Assembly Coating.

Ammonium perchlorate (AP), which is the most commonly used oxidant in composite propellants, plays a vital role in the combustion performance of propellants. In this work, by coating the AP surface with a self-assembled coating layer of gallic acid (GA) and transition metal ions (Cu or Fe) and then connecting it with a 1,1,2,2-perfluorodecyltrichlorosilane (PDTS) coating layer, the AP@GA-M@PDTS (M = Cu or Fe) composite was successfully prepared. Molecular dynamics simulation calculations show that GA and AP have a good binding ability.

Spatial-temporal variations of kelp I contents in coastal waters of China before and after the Fukushima Daiichi Nuclear Power Plant accident.

Radioactive I isotope, as one of the main products of the nuclear fission process, can be applied to track radioactive substances in the environment. So far, limited studies have investigated the spatial-temporal distribution of I in marine ecosystems including the I isotope released via nuclear activities. This study reports the I concentrations of kelps collected from the shallow coastal Yellow Sea and East China Sea from 2009 to 2021.

Structural insights into the diverse actions of magnesium on NMDA receptors.

Magnesium (Mg) is a key regulatory ion of N-methyl-ᴅ-aspartate (NMDA) receptors, including conferring them to function as coincidence detectors for excitatory synaptic transmission. However, the structural basis underlying the Mg action on NMDA receptors remains unclear. Here, we report the cryo-EM structures of GluN1-N2B receptors and identify three distinct Mg-binding pockets.

The psychological side of menopause: evidence from the comorbidity network of menopausal, anxiety, and depressive symptoms.

Objective: Numerous studies have uncovered a correlation between menopausal, anxiety, and depressive symptoms. How these symptoms interrelate and influence each other, however, remains unclear. This study aimed to identify the associations between menopausal, anxiety, and depressive symptoms using network analysis.

Ebullition dominates methane emissions in stratified coastal waters.

Coastal areas are an important source of methane (CH). However, the exact origins of CH in the surface waters of coastal regions, which in turn drive sea-air emissions, remain uncertain. To gain a comprehensive understanding of the current and future climate change feedbacks, it is crucial to identify these CH sources and processes that regulate its formation and oxidation.

Comparing the Analgesic Effects Between the Pre- and Post-costal Cartilage Harvest Cohorts Using Ultrasound-Guided Deep Serratus Anterior Plane Block in Children with Microtia Undergoing Auricular Reconstruction: A Randomized Clinical Trial.

Purpose: Pain following costal cartilage harvest surgery is the most common complaint of auricular reconstruction (AR). Anesthesiologists are continuously searching for an effective postoperative pain control method.

Methods: This study was conducted from 10 April 2022 to 10 June 2022.

Effects of different habitual foot strike patterns on kinematics of the first metatarsophalangeal joint during shod running-a statistical parametric mapping study.

Existing studies on the biomechanical characteristics of the first metatarsophalangeal joint (1st MTPJ) during shod running are limited to sagittal plane assessment and rely on skin marker motion capture, which can be affected by shoes wrapping around the 1st MTPJ and may lead to inaccurate results. This study aims to investigate the effects of different habitual foot strike patterns (FSP) on the six degrees of freedom (6DOF) values of the 1st MTPJ under shod condition by utilizing a dual-fluoroscopic imaging system (DFIS). Long-distance male runners with habitual forefoot strike (FFS group, = 15) and rearfoot strike (RFS group, = 15) patterns were recruited.

Facile Recrystallization Process for Tuning the Crystal Morphology and Thermal Safety of Industrial Grade PYX.

In this study, the crystal appearance of industrial grade 2,6-diamino-3,5-dinitropyridine (PYX) was mostly needle-shaped or rod-shaped with an average aspect ratio of 3.47 and roundness of 0.47.

Acute effect of foot strike patterns on in vivo tibiotalar and subtalar joint kinematics during barefoot running.

Background: Foot kinematics, such as excessive eversion and malalignment of the hindfoot, are believed to be associated with running-related injuries. The majority of studies to date show that different foot strike patterns influence these specific foot and ankle kinematics. However, technical deficiencies in traditional motion capture approaches limit knowledge of in vivo joint kinematics with respect to rearfoot and forefoot strike patterns (RFS and FFS, respectively).

Methane emissions offset atmospheric carbon dioxide uptake in coastal macroalgae, mixed vegetation and sediment ecosystems.

Coastal ecosystems can efficiently remove carbon dioxide (CO) from the atmosphere and are thus promoted for nature-based climate change mitigation. Natural methane (CH) emissions from these ecosystems may counterbalance atmospheric CO uptake. Still, knowledge of mechanisms sustaining such CH emissions and their contribution to net radiative forcing remains scarce for globally prevalent macroalgae, mixed vegetation, and surrounding depositional sediment habitats.

Effects of Barefoot and Shod on the Kinematics of Medial Longitudinal Arch During Running Based on a High-Speed Dual Fluoroscopic Imaging System.

Shoes affect the biomechanical properties of the medial longitudinal arch (MLA) and further influence the foot's overall function. Most previous studies on the MLA were based on traditional skin-marker motion capture, and the observation of real foot motion inside the shoes is difficult. Thus, the effect of shoe parameters on the natural MLA movement during running remains in question.

Foot and Ankle Kinematics During Activities Measured by Using a Dual Fluoroscopic Imaging System: A Narrative Review.

Foot and ankle joints are complicated anatomical structures that combine the tibiotalar and subtalar joints. They play an extremely important role in walking, running, jumping and other dynamic activities of the human body. The kinematic analysis of the foot and ankle helps deeply understand the movement characteristics of these structures, as well as identify abnormal joint movements and treat related diseases.

[Progress on in vivo ankle biomechanics based on dual fluoroscopic imaging technology].

The technical deficiencies in traditional medical imagining methods limit the study of ankle biomechanics. A dual fluoroscopic imaging system (DFIS) provides accurate and non-invasive measurements of dynamic and static activities in joints of the body. This approach can be used to quantify the movement in the single bones of the ankle and analyse different morphological and complex bone positions and movement patterns within these organs and has been widely used in the field of image diagnosis and evaluation of clinical biomechanics.

Low Abundance of Methanotrophs in Sediments of Shallow Boreal Coastal Zones With High Water Methane Concentrations.

Coastal zones are transitional areas between land and sea where large amounts of organic and inorganic carbon compounds are recycled by microbes. Especially shallow zones near land have been shown to be the main source for oceanic methane (CH) emissions. Water depth has been predicted as the best explanatory variable, which is related to CH ebullition, but exactly how sediment methanotrophs mediates these emissions along water depth is unknown.

Systematic Review of the Role of Footwear Constructions in Running Biomechanics: Implications for Running-Related Injury and Performance.

Although the role of shoe constructions on running injury and performance has been widely investigated, systematic reviews on the shoe construction effects on running biomechanics were rarely reported. Therefore, this review focuses on the relevant research studies examining the biomechanical effect of running shoe constructions on reducing running-related injury and optimising performance. Searches of five databases and Footwear Science from January 1994 to September 2018 for related biomechanical studies which investigated running footwear constructions yielded a total of 1260 articles.

Fatigue alters the biomechanical contribution of lower extremity joints during a stretch-shortening cycle task.

Purpose: This study aimed to explore the effect of fatigue on the biomechanical contribution of the lower extremity joints during a typical stretch-shortening cycle (SSC) task.

Methods: 15 male athletes completed drop jump (DJ) under pre- and post-fatigue. Vicon motion capture system and 3D Kistler force plates were used to collect kinematics and ground reaction force data simultaneously.

FPGA implementation of rate-adaptive spatially coupled LDPC codes suitable for optical communications.

In this paper, we propose a unified field-programmable gate array (FPGA) structure for a rate-adaptive forward error correction (FEC) scheme based on spatially coupled (SC) LDPC codes derived from quasi-cyclic (QC) LDPC codes. We described the unified decoder structure in detail and showed that the rate adaptation can be achieved by a controller on-the-fly. By FPGA based emulation, the results show that, with comparable complexity, the SC codes provide larger coding gain.

Effects of Exercise-Induced Fatigue on Lower Extremity Joint Mechanics, Stiffness, and Energy Absorption during Landings.

The aim of this study was to determine the effects of two fatigue protocols on lower-limb joint mechanics, stiffness and energy absorption during drop landings. Fifteen male athletes completed landing tasks before and after two fatigue protocols (constant speed running [R-FP] and repeated shuttle sprint plus vertical jump [SJ-FP]). Sagittal plane lower-limb kinematics and ground reaction forces were recorded.

Run-time reconfigurable adaptive LDPC coding for optical channels.

In this paper, we proposed a class of large-girth QC-LDPC codes designed to maximize the girth property with code rates ranging from 0.5 to 0.8, which leads to well-structured parity-check matrix and generator matrix.