The Effects of and on the Characteristics and Microbial Community of Silage.

The utilization of nettle () as feed is restricted by its material properties (antibacterial activity and high buffering capacity). This study hypothesized that the use of lactic acid bacteria (LAB) attached to nettles can improve these problems. (LG), (PP), and LG + PP (LP) isolated from nettles were inoculated into nettle silage to explore nutrient retention and the microbial community structure.

Involvement of 4-pentenoic acid in causing quality deterioration of nettle silage: study of antibacterial mechanism.

Unlabelled: Nettle showed several benefits for animals as an unconventional feed source, but it is difficult to ensile in order to be better utilized. Recently, nettle has been utilized to alternate alfalfa as ruminant feed, but it is usually poor in ensiling quality. To determine the endogenous component influencing ensiling, we investigated the effect of on the characteristics of nettle silage and the mechanism of action of these substances against .

Temporal trends of presumed cardiac origin out-of-hospital cardiac arrest incidence in Guangzhou, southern China: A 10-year consecutive analysis.

Background: Despite the rising disease mortality rates, there is a dearth of studies on the incidence and trends of out-of-hospital cardiac arrests (OHCA) in China. This study aims to investigate the incidence and temporal trends of presumed cardiac origin OHCA in Guangzhou, Southern China, from 2011 to 2020.

Methods And Results: In this population-based retrospective cohort study, pre-hospital data from the Guangzhou Emergency Medical Service (GZ-EMS) from 2011 to 2020 were analyzed.

The Effect of Silage on the Growth Performance, Blood Physiological Parameters, Serum Biochemical Parameters, Immune Response, Antioxidant Capacity, and Rumen Bacteria of Kazakh Lamb.

Numerous studies have demonstrated that is an unconventional feed resource with significant developmental potential. This research aimed to explore the effects of silage on the growth performance, blood parameters, immunity, antioxidation, cytokine levels, and rumen bacterial composition of Kazakh lamb. Forty healthy male Kazakh lambs, aged 5 months and weighing 30.

Selective Oxidation of Glycerol to Lactic Acid Catalyzed by CuO/Activated Carbon and Reaction Kinetics.

Activated carbon-supported CuO catalysts were prepared by an ammonia evaporation method and applied to catalyze the selective oxidation of glycerol to lactic acid. The effects of CuO loadings on the structure and catalytic performance of the catalyst were investigated. Results showed that CuO could be dispersed uniformly on the surface of activated carbon, promoting the increase of the reaction rate and accelerating the glycerol conversion significantly.

Influence of Engineering Parameters on Fracture Vertical Propagation in Deep Shale Reservoir: A Numerical Study Based on FEM.

The geometry of hydraulic fractures in deep shale facies is significantly affected by the longitudinal inhomogeneity of rock physical properties and stresses. Numerous studies have been conducted on the influence of the longitudinal inhomogeneity of rocks on fracture morphology. However, there is still a lack of research that simultaneously considers the reservoir dip, bedding plane interface, and longitudinal inhomogeneity of the reservoir.

Combining plasmon-enhanced fluorescence with Rayleigh surface acoustic waves to quantify Carcinoembryonic Antigen from human plasma.

To improve the direct quantification of Carcinoembryonic Antigen (CEA) from body fluids by immunofluorescence, a surface acoustic wave (SAW) based biosensor was developed combined with an optimized silver nanostructure at the sensing region. Fluorescence signal amplification is achieved by patterning silver nanostructures using the rapid thermal annealing (RTA) method. In addition, the problem of background noise interference from nonspecific binding in human plasma is addressed by Rayleigh wave streaming at the immunoassay region, which shows a reduction in the limit of detection.

Effect of Ce doping on the structure-activity relationship of MoVO composite metal oxides.

A series of Ce-doped MoVO composite metal oxide catalysts were prepared by the rotary evaporation method. The effects of Ce doping ratio on the crystal phase composition, morphology and surface properties of the catalysts were investigated. The results show that the crystal phase composition of samples with different Ce doping content is also obviously different.

Ce Filling Limit and Its Influence on Thermoelectric Performance of FeCoSb-Based Skutterudite Grown by a Temperature Gradient Zone Melting Method.

CoSb-based skutterudite is a promising mid-temperature thermoelectric material. However, the high lattice thermal conductivity limits its further application. Filling is one of the most effective methods to reduce the lattice thermal conductivity.

Regulating Water Reduction Kinetics on MoP Electrocatalysts Through Se Doping for Accelerated Alkaline Hydrogen Production.

Owing to its low cost, high conductivity, and chemical stability, Molybdenum phosphide (MoP) has great potential for electrochemically catalyzing the hydrogen evolution reaction (HER). Unfortunately, the development of high-activity MoP still remains a grand challenge in alkali-electrolyzers due to its sluggish water reduction kinetics. Here, we demonstrate a novel strategy for regulating the HER kinetics of the MoP nanowire cathode through partially substituting P atoms with Se dopants.

Facile sub-/supercritical water synthesis of nanoflake MoVTeNbO -mixed metal oxides without post-heat treatment and their catalytic performance.

A fast and simple sub-/supercritical water synthesis method is presented in this work in which MoVTeNbO -mixed metal oxides with various phase compositions and morphologies could be synthesized without post-heat treatment. It was demonstrated that the system temperature for synthesis had a significant influence on the physico-chemical properties of MoVTeNbO . Higher temperatures were beneficial for the formation of a mixed crystalline phase containing TeVO, TeMoVO, MoO and TeO, which are very different from the crystalline phases of conventional Mo-V-Te-Nb-mixed metal oxides.

Single-Crystalline Mo-Nanowire-Mediated Directional Growth of High-Index-Faceted MoNi Electrocatalyst for Ultralong-Term Alkaline Hydrogen Evolution.

As appealing alternatives to noble-metal-based electrocatalysts for catalyzing hydrogen evolution reaction (HER) in alkali electrolyzers, earth-abundant MoNi-based catalysts have attracted intensive attention. Unfortunately, the exploration of MoNi-based electrocatalysts with superior intrinsic activity and ultralong-term stability still remains a grand challenge. Here, ultralong high-index faceted Mo@MoNi core-shell nanowires were topochemically synthesized through the thermal reduction of Mo@NiMoO core-shell nanowires, where single-crystalline Mo support facilitates the topological transformation of NiMoO into high-index faceted MoNi.

[Using of pre-hospital emergency resources by acute alcoholism patients in a hospital in Guangzhou: a data survey from 2009 to 2018].

Objective: To analyze the using of pre-hospital emergency resources and treatment characteristics of acute alcoholism patients in Guangzhou.

Methods: The pre-hospital emergency data of the emergency department of the Second Affiliated Hospital of Guangzhou Medical University from January 1st in 2009 to December 31st in 2018 were obtained from the database of the Guangzhou Emergency Medical Command Center. The related data of patients with acute alcoholism were collected, including gender, age, poisoning severity, treatment results, caller type, number of empty vehicles (empty vehicle was defined as the empty vehicle return caused by the ambulance who did not receive or refused to come to the hospital after the ambulance leaved), departure time (from the ambulance to the completion time), on-site time (from the ambulance to the patient boarding time) and the distribution of pre-hospital emergency time in 24 hours on weekdays and weekends.

Design of a Portable Orthogonal Surface Acoustic Wave Sensor System for Simultaneous Sensing and Removal of Nonspecifically Bound Proteins.

One challenge for current surface acoustic wave (SAW) biosensors is reducing nonspecific adsorption. A device propagating Rayleigh and shear horizontal surface acoustic waves in orthogonal directions fabricated in ST quartz has the capability of achieving simultaneous detection and nonspecific binding (NSB) protein removal. Current measurement methods for a SAW sensor system based on this device require large-size and expensive equipment such as a vector network analyzer (VNA), signal generator, and frequency counter, which are not suitable for portable, especially point-of-care, applications.

Investigation of the In-Plane Mechanical Anisotropy of Magnesium Alloy AZ31B-O by VPSC⁻TDT Crystal Plasticity Model.

The in-plane mechanical anisotropy of magnesium alloy sheet, which significantly influences the design of the parts produced by Mg alloy sheets, is of great importance regarding its wide application. Though the stress-strain response and texture evolution have been intensively investigated, and the anisotropy of Mg alloy can be significantly substantiated by its R-value, which reveals the lateral response of a material other than the primary response. As a consequence, the conjunction of viscoplastic self-consistent model and twinning and detwinning scheme (VPSC-TDT) is employed to investigate the in-plane anisotropy of magnesium alloy AZ31B-O sheet.

Synthesis and Magnetic Properties of Ferroferric Oxide in Supercritical Methanol.

Ferroferric oxide was prepared using Fe(NO₃)₃ · 9H₂O as the iron source under supercritical methanol conditions. Methanol was not only a solvent but also a reducing agent in the supercritical state. The effects of reaction temperature and time, and precursor concentration on product composition were investigated.

Differential physiological and metabolic response to low temperature in two zoysiagrass genotypes native to high and low latitude.

Low temperature is one of the important limiting factors for growing season and geographical distribution of plants. Zoysiagrass (Zoysia Willd) is one of the widely used warm-season turfgrass that is distribute in many parts of the world. Zoysaigrass native to high latitude may have evolved higher cold tolerance than the ones native to low latitude.

Ambient particulate matter air pollution associated with acute respiratory distress syndrome in Guangzhou, China.

Limited evidence exists concerning the impact of particulate pollution on acute respiratory distress syndrome (ARDS). We examined the effects of particulate pollution on emergency ambulance dispatches (EAD) for ARDS in Guangzhou, China. Daily air pollution concentrations for PM, PM, and PM, as well as PM chemical compositions, were available from a central air monitoring station.

Boron-doped graphene as a metal-free catalyst for gas-phase oxidation of benzyl alcohol to benzaldehyde.

Boron-doped graphene samples (BGs) with tunable boron content of 0-2.90 at% were synthesized and directly used in the gas-phase oxidation of benzyl alcohol to benzaldehyde, and showed excellent performance. XPS results indicated that the graphitic sp B species (BC) is the mainly boron dopant species incorporated in the graphene lattice, which could significantly improve the content of ketone carbonyl groups (C[double bond, length as m-dash]O) on the graphene.

Integrating Metal-Enhanced Fluorescence and Surface Acoustic Waves for Sensitive and Rapid Quantification of Cancer Biomarkers from Real Matrices.

Metal-enhanced fluorescence (MEF) is utilized to lower the detection limit of carcinoembryonic antigen (CEA), a prognostic biomarker for colorectal cancer among others, in immunofluorescence assays. In addition, Rayleigh surface acoustic waves (SAWs) were utilized to remove nonspecifically bound proteins, improve mixing, and reduce incubation times. Fluorescence intensity was plasmonically enhanced by incubating silver nanocubes (AgNCs) of 50 nm edge-length on a SAW device.

Gold nanoparticle-based low limit of detection Love wave biosensor for carcinoembryonic antigens.

In this work, a Love wave biosensing platform is described for detecting cancer-related biomarker carcinoembryonic antigen (CEA). An ST 90°-X quartz Love wave device with a layer of SiO waveguide was combined with gold nanoparticles (Au NPs) to amplify the mass loading effect of the acoustic wave sensor to achieve a limit of detection of 37pg/mL. The strategy involves modifying the Au NPs with anti-CEA antibody conjugates to form nanoprobes in a sandwich immunoassay.

Theoretical Study of Monolayer and Double-Layer Waveguide Love Wave Sensors for Achieving High Sensitivity.

Love wave sensors have been widely used for sensing applications. In this work, we introduce the theoretical analysis of the monolayer and double-layer waveguide Love wave sensors. The velocity, particle displacement and energy distribution of Love waves were analyzed.

Evaluating the Impact of Criminalizing Drunk Driving on Road-Traffic Injuries in Guangzhou, China: A Time-Series Study.

Background: Road-traffic injury (RTI) is a major public-health concern worldwide. However, the effectiveness of laws criminalizing drunk driving on the improvement of road safety in China is not known.

Methods: We collected daily aggregate data on RTIs from the Guangzhou First-Aid Service Command Center from 2009 to 2012.