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2021-04-01 | The metabolically engineered plant pathogen Ustilago maydis MB215 Δ cyp3 P etef ria1 has been cultivated to produce more than 80 g/L itaconate in 16 L scale pH and temperature controlled fermentation, in fed-batch mode with two successive feedings. The effect of pH as well as successive rounds of feeding has been quant... | High level production of itaconic acid at low pH by Ustilago maydis with fed-batch fermentation | 10.1007/s00449-020-02483-6 |
2021-04-01 | Background An estimated 5–10 % of healthy vaccinees lack adequate antibody response following receipt of a standard three-dose hepatitis B vaccination regimen. The cellular mechanisms responsible for poor immunological responses to hepatitis B vaccine have not been fully elucidated to date. Methods There were 61 low re... | Circulating Tfh cell and subsets distribution are associated with low‐responsiveness to hepatitis B vaccination | 10.1186/s10020-021-00290-7 |
2021-04-01 | With the acceleration of urbanization, the unknown risks faced by cities and regions are also increasing, and their vulnerability is exposed, which has become a major problem hindering sustainable development. Through the study of disaster risk assessment, we can find out regional disaster-causing factors and social vu... | Place vulnerability assessment based on the HOP model in the middle and lower reaches of the Yangtze River | 10.1007/s10708-019-10092-4 |
2021-04-01 | Abstract The batch processing of an organic solvent methyl tert -butyl ether with obtaining a product of high purity was investigated. The separation coefficients of methyl tert -butyl ether and the main impurities contained in the technical product are found. Static and hydrodynamic parameters of the process were dete... | Production of Highly Pure Methyl tert-Butyl Ether | 10.1134/S1070427221040157 |
2021-04-01 | Purpose This paper aims to show the potentialities of computational bioengineering in the field of lower urinary tract pathophysiology. Engineering methods allow the investigation of urine flow in healthy and pathologic conditions and the analysis of urethral occlusion by means of artificial urinary sphincters. Methods... | Computational Tools for the Investigation of the Male Lower Urinary Tract Functionality in Health and Disease | 10.1007/s40846-021-00599-y |
2021-04-01 | Oral squamous cell carcinoma (OSCC) is the most common head and neck malignancy; it has been shown that cancer stem cells (CSC) are present in OSCC and associated with tumor growth, invasion, metastasis, and therapeutic resistance. Photobiomodulation (PBM) is an alternative tool for oncologic treatment adverse effects ... | Effects of photobiomodulation on cellular viability and cancer stem cell phenotype in oral squamous cell carcinoma | 10.1007/s10103-020-03131-x |
2021-04-01 | Purpose Carbohydrate (CHO) restriction could be a potent metabolic regulator of endurance exercise-induced muscle adaptations. Here, we determined whether post-exercise CHO restriction following strenuous exercise combining continuous cycling exercise (CCE) and sprint interval exercise could affect the gene expression ... | Carbohydrate restriction following strenuous glycogen-depleting exercise does not potentiate the acute molecular response associated with mitochondrial biogenesis in human skeletal muscle | 10.1007/s00421-021-04594-8 |
2021-04-01 | Objectives To explore a method to create affordable anatomical models of the biliary tree that are adequate for training laparoscopic cholecystectomy with an in-house built simulator. Methods We used a fused deposition modeling 3D printer to create molds of Acrylonitrile Butadiene Styrene (ABS) from Digital Imaging and... | 3D-printed anatomical models of the cystic duct and its variants, a low-cost solution for an in-house built simulator for laparoscopic surgery training | 10.1007/s00276-020-02631-3 |
2021-04-01 | Background Since Rothenberg first performed thoracoscopic repair for esophageal atresia with distal tracheoesophageal fistula (EA/TEF) successfully in 2000, thoracoscopic repair has achieved status as a routine procedure worldwide. Previously, an international multicenter study reported that this procedure was not infe... | Thoracoscopic repair of esophageal atresia with distal tracheoesophageal fistula: is it a safe procedure in infants weighing less than 2000 g? | 10.1007/s00464-020-07538-z |
2021-04-01 | Suncun coal mine in Xinwen mining area is a typical deep rockburst mine. And the main mining seams are the No.2 and No.4 coal seams. The No.2 coal seam is with the weak bursting liability, and its roof and floor with the strong bursting liability; the No.4 coal seam and its roof and floor are with the weak bursting lia... | Overlying Strata Structure Evolution and Engineering Practice Based on the Mining of Lower Liberating Seam in Deep Bursting Coal Seam Group | 10.1007/s10706-021-01693-3 |
2021-04-01 | This study evaluated the effect of photobiomodulation therapy (PBMt) before or after a high-intensity resistance exercise (RE) session on muscle oxidative stress. Female Wistar rats were assigned to one of the following groups: Sham (non-exercised, undergoing placebo-PBMt); NLRE (exercised, undergoing placebo-PBMt); PB... | Post-resistance exercise photobiomodulation therapy has a more effective antioxidant effect than pre-application on muscle oxidative stress | 10.1007/s43630-021-00042-w |
2021-04-01 | Purpose Lumbar Modic change (MC) can serve as a diagnostic marker as well as an independent source of chronic low back pain (CLBP). This study aimed to test for the existence of serum biomarkers in CLBP patients with MC. Methods Age- and sex-matched CLBP patients with confirmed MC on lumbar MRI (n = 40) and pain-free c... | Serum biomarkers for Modic changes in patients with chronic low back pain | 10.1007/s00586-020-06713-z |
2021-04-01 | Scar following caesarean section surgery is an important aspect affecting aesthetics and function in young ladies. This study was done to compare the effectiveness of scar modulation using topical silicone gel in post-lower segment caesarean section scar in primigravida. Case series analysis was conducted between 01 Ju... | Randomised Control Clinical Trial of Topical Silicone Gel in Post-Lower Segment Caesarean Section Closure scar in Primigravida | 10.1007/s12262-020-02420-7 |
2021-04-01 | The desorbed gas composition and δ 13 C (CH4) and δ D (CH4) of five coal groups in Well DE-A of the Labudalin Basin in northeastern Inner Mongolia show that the δ 13 C (CH4) and δ D (CH4) are heavy, and significantly heavier in some layers, whereas the overall δ 13 C (CO2) is abnormally light. Based on coalfield explor... | Differentiation of Carbon Isotope Composition and Stratabound Mechanism of Gas Desorption in Shallow-Buried Low-Rank Multiple Coal Seams: Case Study of Well DE-A, Northeast Inner Mongolia | 10.1007/s11053-020-09781-6 |
2021-04-01 | To investigate the beneficial effects of oridonin, a diterpenoid compound isolated from Rabdosia rubescens, on the inflammatory response in TNBS-induced post-inflammatory irritable bowel syndrome (PI-IBS) model and the underlying mechanism. Using the PI-IBS rat model and Caco-2 cell lines, we found that intestinal barr... | Oridonin Attenuates TNBS-induced Post-inflammatory Irritable Bowel Syndrome via PXR/NF-κB Signaling | 10.1007/s10753-020-01364-0 |
2021-04-01 | Objective To assess the short term outcome and predictors of mortality among very low birth weight (VLBW) neonates. Methods This descriptive study from a tertiary care teaching institute in south India included 239 VLBW neonates who were uniformly managed as per unit’s protocol and followed up till discharge or death, ... | Short Term Outcome and Predictors of Mortality Among Very Low Birth Weight Infants – A Descriptive Study | 10.1007/s12098-020-03456-z |
2021-04-01 | Abstract — The elimination kinetics of carbonyl-modified low density lipoproteins (LDL) from rabbit bloodstream was studied using isolated LDL of rabbits and humans after preliminary biotinylation or labeling with FITC. Rabbit or human blood plasma LDL were isolated using differential ultracentrifugation in a density g... | Clearance of Carbonyl-Modified Low-Density Lipoproteins in Rabbits | 10.1134/S1990750821020104 |
2021-04-01 | Abstract The experiments at the FT-2 tokamak are described that were focused on clearing up the role of the parametric decay instabilities in decreasing the generation efficiency of the non-inductive current excited by the electromagnetic waves in the lower hybrid frequency range. The most discussed instability of such... | Studies of Spectral Broadening of the Lower Hybrid Wave Line in the Current-Drive Regimes and Ion Heating at the FT-2 Tokamak | 10.1134/S1063780X2104005X |
2021-03-31 | Daily River Malaba flows recorded from 1999 to 2016 were modelled using seven lumped conceptual rainfall–runoff models including AWBM, SACRAMENTO, TANK, IHACRES, SIMHYD, SMAR and HMSV. Optimal parameters of each model were obtained using an automatic calibration strategy. Mismatches between observed and modelled flows ... | Performance of rainfall–runoff models in reproducing hydrological extremes: a case of the River Malaba sub-catchment | 10.1007/s42452-021-04514-7 |
2021-03-31 | Data on comprehensive population-based surveillance of antimicrobial resistance is lacking. In low- and middle-income countries, the challenges are high due to weak laboratory capacity, poor health systems governance, lack of health information systems, and limited resources. Developing countries struggle with politica... | Surveillance of antimicrobial resistance in low- and middle-income countries: a scattered picture | 10.1186/s13756-021-00931-w |
2021-03-30 | Highlights Hard-carbon anode dominated with ultra-micropores (< 0.5 nm) was synthesized for sodium-ion batteries via a molten diffusion–carbonization method. The ultra-micropores dominated carbon anode displays an enhanced capacity, which originates from the extra sodium-ion storage sites of the designed ultra-micropor... | From Micropores to Ultra-micropores inside Hard Carbon: Toward Enhanced Capacity in Room-/Low-Temperature Sodium-Ion Storage | 10.1007/s40820-020-00587-y |
2021-03-30 | Background Pneumoperitoneum and Trendelenburg position in laparoscopic surgeries could contribute to postoperative pulmonary dysfunction. In recent years, intraoperative lung-protective mechanical ventilation (LPV) has been reportedly able to attenuate ventilator-induced lung injuries (VILI). Our objectives were to tes... | Lung-protective mechanical ventilation for patients undergoing abdominal laparoscopic surgeries: a randomized controlled trial | 10.1186/s12871-021-01318-5 |
2021-03-26 | Background Low temperature (LT) is one of the main limiting factors that affect growth and development in grape. Increasing soluble sugar and scavenging reactive oxygen species (ROS) play critical roles in grapevine resistance to cold stress. However, the mechanism of β-amylase (BAM) involved in the regulation of sugar... | Genome-wide identification of BAM genes in grapevine (Vitis vinifera L.) and ectopic expression of VvBAM1 modulating soluble sugar levels to improve low-temperature tolerance in tomato | 10.1186/s12870-021-02916-8 |
2021-03-25 | Background K-seq, a new genotyping methodology based on the amplification of genomic regions using two steps of Klenow amplification with short oligonucleotides, followed by standard PCR and Illumina sequencing, is presented. The protocol was accompanied by software developed to aid with primer set design. Results As t... | K-seq, an affordable, reliable, and open Klenow NGS-based genotyping technology | 10.1186/s13007-021-00733-6 |
2021-03-25 | Background As an object’s electrical passive property, the electrical conductivity is proportional to the mobility and concentration of charged carriers that reflect the brain micro-structures. The measured multi- b diffusion-weighted imaging (M b -DWI) data by controlling the degree of applied diffusion weights can qu... | Decomposition of high-frequency electrical conductivity into extracellular and intracellular compartments based on two-compartment model using low-to-high multi-b diffusion MRI | 10.1186/s12938-021-00869-5 |
2021-03-24 | We study the drag resistivity numerically for charge carriers in a specially separated electron-electron (e-e) bilayer system for both the symmetric and asymmetric case in weak interaction and Boltzmann regime. Interaction in Coulomb drag effect is based on Coulomb interaction in a specially separated bilayer systems. ... | Study of drag resistivity in dielectric medium with the correlations effect | 10.1007/s00339-021-04422-y |
2021-03-24 | The aerodynamic design optimization of an airfoil is carried out at a transitional low Reynolds number in the framework of multi-fidelity surrogate modeling. Two multi-fidelity surrogate-based optimization methodologies are proposed. The first method involves the co-Kriging surrogate model with prediction-based high-fi... | Multi-fidelity surrogate model-based airfoil optimization at a transitional low Reynolds number | 10.1007/s12046-021-01580-w |
2021-03-23 | In this research, multi-layer co-extrusion technology was adopted to prepare Polypropylene random copolymer (PPR)/Polyethylene of raised temperature resistance (PERT) composite pipes. The structures and mechanical properties of PPR/PERT composite pipe were investigated by scanning electron microscopy (SEM), Dynamic the... | Improving the low-temperature toughness of PPR pipe by compounding with PERT | 10.1007/s10965-021-02501-5 |
2021-03-23 | Background Dust accumulation covers the leaf’s surface and influences foliar physiological activity. Two independent experiments were carried out to instigate the foliar responses to dust accumulation and the penetration limitation of small dust particles (< 1 μm) on the foliar surface, respectively. In experiment I, t... | Similar effects as shade tolerance induced by dust accumulation and size penetration of particulates on cotton leaves | 10.1186/s12870-021-02926-6 |
2021-03-23 | Background The extent to which income setting or rural and urban environments modify the association between sleep and obesity in young children is unclear. The aims of this cross-sectional observational study were to (i) describe and compare sleep in South African preschool children from rural low-income (RL), urban l... | Sleep and BMI in South African urban and rural, high and low-income preschool children | 10.1186/s12889-021-10591-5 |
2021-03-21 | The recently discovered and prepared honeycomb borophene is one of the many forms of borophene. For the first time, we studied the tribological properties of honeycomb borophene based on first principles and found that it has excellent tribological performance. As a two-dimensional material, honeycomb borophene has pot... | Ultra-Low Friction of Graphene/Honeycomb Borophene Heterojunction | 10.1007/s11249-021-01418-w |
2021-03-16 | Due to the increased processing data rates, which is required in applications such as fifth-generation (5G) wireless networks, the battery power will discharge rapidly. Hence, there is a need for the design of novel circuit topologies to cater the demand of ultra-low voltage and low power operation. In this paper, a lo... | A 219-µW ultra-low power low-noise amplifier for IEEE 802.15.4 based battery powered, portable, wearable IoT applications | 10.1007/s42452-021-04402-0 |
2021-03-13 | This article describes a 135-m-thick sequence collection from the lower Eocene limestones of the Dungul Formation that caps the Sinn El-Kaddab Plateau in the Kurkur area. A sedimentological evolution model of these limestones has been constructed for the first time primarily based totally on lithology, microfacies anal... | Sedimentological evolution and diagenesis of lower Eocene limestones, the Sinn El-Kaddab Plateau, the southern extent of the Tethys Sea in Egypt | 10.1007/s12517-021-06844-7 |
2021-03-12 | Background Low temperature (LT) often occurs at the seedling stage in the early rice-growing season, especially for direct seeded early-season indica rice, and using flooding irrigation can mitigate LT damage in rice seedlings. The molecular mechanism by which flooding mitigates the damage induced by LT stress has not ... | Transcriptomic, proteomic, and physiological comparative analyses of flooding mitigation of the damage induced by low-temperature stress in direct seeded early indica rice at the seedling stage | 10.1186/s12864-021-07458-9 |
2021-03-12 | Rice growth is sensitive to low temperature. Chilling injury is one of the main natural disasters in rice cultivation, and is damaging to rice growth at all developmental stages. Low-temperature germinability (LTG) is an important trait for seedling establishment, especially in rice direct-sowing practice. However, the... | Mapping QTLs controlling low-temperature germinability in rice by using single segment substitution lines derived from 4 AA-genome species of wild rice | 10.1007/s10681-021-02791-2 |
2021-03-12 | Background Low-density lipoprotein cholesterol (LDL-C) is one of the most important types of cholesterol and has an impact on health. Certain lifestyle and dietary habits in different populations may leads to increased levels of LDL-C, particularly among those with poor education and economic statuses, such as hill tri... | Factors associated with elevated low-density lipoprotein cholesterol levels among hill tribe people aged 30 years and over in Thailand: a cross-sectional study | 10.1186/s12889-021-10577-3 |
2021-03-12 | Background Locked twins is a rare and hazardous obstetric complication, which occurs in approximately 1:1000 twin pregnancies. One of the known etiologic factors for locked twins is size of the twins. We report a case of chin-to-chin locked twins that occurred at gestational age of 30 weeks pus 6 days. Case summary A 2... | Locked twins—remote from term: a case report | 10.1186/s13256-021-02725-5 |
2021-03-12 | The study of the lower limit of filling of the pore throat in tight sandstone reservoirs is an essential part of reservoir evaluation. It can guide exploration and development and helps understand tight oil accumulation and estimate saturation. Determining this lower limit of pore throat filling has mainly been based o... | Study of the lower limit of pore throat filling in tight sandstone reservoir of Gaotaizi oil layer in Qijia area | 10.1007/s12517-021-06785-1 |
2021-03-10 | Spectroscopic observations at extreme- and far-ultraviolet wavelengths have revealed systematic upflows in the solar transition region and corona. These upflows are best seen in the network structures of the quiet Sun and coronal holes, boundaries of active regions, and dimming regions associated with coronal mass ejec... | Upflows in the Upper Solar Atmosphere | 10.1007/s11207-021-01792-7 |
2021-03-10 | Monitoring sea level is critical due to climate change observed over the years. Global Navigation Satellite System Reflectometry (GNSS-R) has been widely demonstrated for coastal sea-level monitoring. The use of signal-to-noise ratio (SNR) observations from ground-based stations has been especially productive for altim... | An open-source low-cost sensor for SNR-based GNSS reflectometry: design and long-term validation towards sea-level altimetry | 10.1007/s10291-021-01087-1 |
2021-03-08 | Gold-enhanced mechanical exfoliation method attracts broad interests in recent years, which has been widely used for preparing large-area and high-quality 2D single crystals. Even many calculations predict that there is strong interaction between Au film and the exfoliated 2D crystals, direct experimental evidence is s... | Raman spectra evidence for the covalent-like quasi-bonding between exfoliated MoS2 and Au films | 10.1007/s11432-020-3173-9 |
2021-03-08 | With the development of human civilization, the demand for resources and the collision with nature are becoming more and more intense. After the burning of fossil fuels, land use has become another major impact plate of atmospheric carbon content. At the same time, it is also the initiator of global change. As a new so... | RETRACTED ARTICLE: Relationship between land use carbon emission and economic growth based on GIS | 10.1007/s12517-021-06794-0 |
2021-03-02 | Broadband photodetector has wide applications in the field of remote sensing, health monitoring and medical imaging. Two-dimensional (2D) materials with narrow bandgaps have shown enormous potential in broadband photodetection. However, the device performance is often restricted by the high dark currents. Herein, we de... | Bi2O2Se/BP van der Waals heterojunction for high performance broadband photodetector | 10.1007/s11432-020-3101-1 |
2021-03-01 | Gasification or combustion of coal and biomass is the most important form of power generation today. However, the use of coal/biomass at high temperatures has an inherent problem related to the ash generated. The formation of ash leads to a problematic phenomenon called slagging. Slagging is the accumulation of molten ... | A critical review of ash slagging mechanisms and viscosity measurement for low-rank coal and bio-slags | 10.1007/s11708-020-0807-8 |
2021-03-01 | In this paper, an investigation on the low-velocity impact (LVI) response of a shear deformable beam laminated by carbon nanotube reinforced composite (CNTRC) layers is performed. The composite beam is “auxetic” due to the negative out-of-plane Poisson’s ratio (NPR) through special symmetric stacking sequences of layer... | The effect of negative Poisson’s ratio on the low-velocity impact response of an auxetic nanocomposite laminate beam | 10.1007/s10999-020-09521-x |
2021-03-01 | TURKSAT-3USAT is the first Turkish communication 3U CubeSat designed and built by the students of the Space Systems Design and Test Laboratory and Radio Frequency Electronics Laboratory of Istanbul Technical University (ITU). Students partnered with TURKSAT, A.S. Company as well as the Turkish Amateur Technology Organi... | Thermal design, analysis, and testing of the first Turkish 3U communication CubeSat in low earth orbit | 10.1007/s10973-021-10566-z |
2021-03-01 | Wireless body sensor networks are becoming a ubiquitous solution to preventing chronic illnesses for a population with an ever-increasing number of elderly people. Through constant and real-time health monitoring, caregivers and medical personnel, and even patients themselves, can act more quickly in the event of a cri... | Wearable thermoelectric generators as energy harvesters for wireless body sensors | 10.1007/s40095-020-00365-x |
2021-03-01 | Quantitative assessment of non-Masing behavior is studied, and a new method is proposed for the estimation of cyclic plastic strain energy density and fatigue life. Low cycle fatigue tests were performed on 304L stainless steel employing strain amplitudes ranging from ±0.25% to ±1.0% at a strain rate of 3 × 10 -3 s -1 ... | Quantitative Assessment and Analysis of Non-Masing Behavior of Materials under Fatigue | 10.1007/s11665-021-05494-w |
2021-03-01 | With the grouting material as focus, this study aims to guarantee that the joint with tenon and mortise constructing a metro station has the necessary waterproof performance, which shall not be poorer than the mechanical properties of the concrete with joints itself, and fine structural integrity. With groutability at ... | An experimental study of modified physical performance test of low-temperature epoxy grouting material for grouting joints with tenon and mortise | 10.1007/s10845-020-01664-0 |
2021-03-01 | In the process of fatigue loading, the segregation of solid solution elements makes dislocations continuously pile-up in ferrite lath to form subgrain, which improves the fatigue properties. In this study, the low cycle fatigue properties of two kinds of Cr-Mo tempered martensitic steels with different grain sizes were... | Strengthening Mechanism of Low Cycle Fatigue Resistance for Cr-Mo Tempered Martensite Steel at 350 °C | 10.1007/s11665-021-05482-0 |
2021-03-01 | Ceramic bricks based on low-melting clay and ferro-dust from self-disintegrating, low-carbon, ferrochrome slags, graded from M100 to M175, respectively, were obtained in the temperature range 950 – 1100°C. The highest grades are in bricks fired at the temperatures 1050 and 1100°C, respectively, M150 and M175, which can... | Phase Composition and Physico-Mechanical Properties at Different Firing Temperatures of Ceramic Earthquake-Resistant Bricks with the Use of Ferro-Dust | 10.1007/s10717-021-00336-6 |
2021-03-01 | With the signing of the Minamata Convention, widespread disposal of mercury metal waste is anticipated in the near future. Due to its environmental effects, mercury metal waste must be stabilized prior to disposal as its mercuric sulfide form and/or solidified with a polymer or cement to reduce leaching and volatilizat... | Long-term leaching and volatilization behavior of stabilized and solidified mercury metal waste | 10.1007/s10163-020-01170-8 |
2021-03-01 | Wafer-level solid liquid interdiffusion (SLID) bonding, also known as transient liquid-phase bonding, is becoming an increasingly attractive method for industrial usage since it can provide simultaneous formation of electrical interconnections and hermetic encapsulation for microelectromechanical systems. Additionally,... | Wafer Level Solid Liquid Interdiffusion Bonding: Formation and Evolution of Microstructures | 10.1007/s11664-020-08530-y |
2021-03-01 | The results of experimental research of low temperatures influence on mechanical characteristics of structural steels of long-term operation in chemically aggressive environments of cooling systems are presented. It is shown that such characteristics of pipe steel as impact toughness (according to Charpy), critical coe... | Some Mechanical Characteristics of Structural Steels of Cooling Systems of Continuous Operation | 10.1007/s11223-021-00285-z |
2021-03-01 | Low-cost plant and algal biomass are increasingly demanded as a source of proteins, and also, peptides and amino acids are gaining interest for their biological and functional properties. The reduction in chemicals, time and energy, and the integral valorization of the raw materials in the framework of biorefineries ar... | Subcritical Water for the Extraction and Hydrolysis of Protein and Other Fractions in Biorefineries from Agro-food Wastes and Algae: a Review | 10.1007/s11947-020-02536-4 |
2021-03-01 | The effect of adding the oxide Nd 2 O 3 (0.1 – 3.0 mol.%) on the synthesis conditions, crystallization, and spectral properties of a thermostable Li 2 O–Al 2 O 3 –SiO 2 (LAS) sitall was studied. The introduction of up to 1 mol.% Nd 2 O 3 no effect on the crystallization properties and the precipitation of the main crys... | Thermostable Transparent Lithium-Aluminosilicate Sitall Doped with Neodymium Oxide | 10.1007/s10717-021-00322-y |
2021-03-01 | The low-temperature sinterability of TiO 2 –CuO systems was examined through a two-step sintering process. The first-step heat treatment was carried out at 900 °C for either 5 min or 1 h. The subsequent second-step sintering by reheating after cooling proceeded at 800 °C for various times. Micron-sized (2 µm) powders a... | Low-temperature sintering behaviors in a titanium oxide–copper oxide system through two-step heat treatment | 10.1007/s43207-020-00092-3 |
2021-03-01 | Abstract The effect of gamma-irradiation with doses of 5, 10, 15, and 20 Mrad on the mechanical characteristics of a polymer composite material has been studied. It has been shown that an increase in the radiation dose leads to an increase in the breaking stress and a decrease in the breaking strain. Toughness values h... | Mechanical Characteristics of a Polymer Composite Material Based on Gamma-Irradiated Low-Molecular-Weight Rubbers | 10.1134/S0018143921020107 |
2021-03-01 | Li 3 VO 4 particles anchored on reduced graphene oxide hybrid (Li 3 VO 4 /rGO) are firstly fabricated through a solvent thermal method at low temperature and atmospheric pressure. In the Li 3 VO 4 /rGO, rGO reduces the particle size of Li 3 VO 4 and improves the electronic conductivity of the hybrid, resulting in excel... | Low temperature and atmospheric pressure fabrication of Li3VO4/rGO hybrid as high-performance anode for lithium-ion batteries | 10.1007/s11581-020-03896-9 |
2021-03-01 | Composite substrates of linear low-density polyethylene with thermotropic liquid crystals as inclusions with three different weight fractions were synthesized. The dielectric characterizations of the composites in X band frequencies were studied to assess their applicability as substrates for microwave devices. Thermot... | Linear Low Density Polyethylene-Thermotropic Liquid Crystal Composite Substrate for High-Frequency Devices: Dielectric Characterization | 10.1007/s11664-020-08626-5 |
2021-03-01 | The authors have presented results of synthesis of carbon nanotubes from low-density polyethylene. The synthesis was carried by thermal destruction of the polyethylene in a chemical-vapor-deposition unit. The process of decomposition of the polyethylene and the synthesis of carbon nanotubes were implemented in one stag... | Recycling of Low-Density Polyethylene Waste for Synthesis of Carbon Nanotubes | 10.1007/s10891-021-02313-w |
2021-03-01 | Abstract — It is shown that the wear resistance of graphitized steel under abrasive action and dry sliding friction can be increased by heat treatment that forms an increased content of metastable residual austenite in the steel structure, which undergoes dynamic strain martensitic transformation (DSMT), the self-quenc... | Increasing the Wear Resistance of Graphitized Steel by Obtaining Metastable Austenite in the Structure | 10.3103/S1068366621020070 |
2021-03-01 | Generation of value-added materials from waste product is in high demand for sustainable chemistry. In order to reduce the use of toxic chemicals in the synthesis of metal nanoparticles, alternative green methods are in demand. Herein, we report the synthesis of copper oxide nanoparticles from plant extract of Colocasi... | Green Biosynthesis of Copper Oxide Nanoparticles Using Waste Colocasia esculenta Leaves Extract and Their Application as Recyclable Catalyst Towards the Synthesis of 1,2,3-triazoles | 10.1007/s12668-021-00826-5 |
2021-03-01 | Biomass-derived carbon-attapulgite adsorbent was developed for organic pollutants removal. All the batch assays were performed to evaluate the effects of organic components, contact time, and initial concentration of organic pollutants on the adsorption performance of the as-prepared adsorbent. The samples were charact... | Promoting adsorption of organic pollutants via tailoring surface physicochemical properties of biomass-derived carbon-attapulgite | 10.1007/s11356-020-10974-y |
2021-03-01 | Abstract The first sediment N-isotope data on the Permian–Triassic boundary transition of the Verkhoyansk region are obtained. Together with the other published materials on other regions of eastern Russia allow us to distinguish a number of N-isotope intervals of various ranks in the Permian–Triassic of eastern Russia... | Variations in Nitrogen Isotope Composition in Clay Deposits of the Permian–Triassic Boundary Beds in the Verkhoyansk Region (Northeast Asia) and Their Implication for Reconstruction of Marine Environments | 10.1134/S0869593821020076 |
2021-03-01 | Ultra high temperature zirconium carbide ceramic powder was prepared using a low cost technique using zirconium isopropoxide and phenolic resin. The effect of monomer feed ratio, heating rate and temperature on the nature and properties of the ceramics obtained were studied in detail. The samples were heat treated at t... | Synthesis of Ultra High Temperature Ceramic Zirconium Carbide for Space Applications | 10.1007/s41403-020-00176-w |
2021-03-01 | The development of ceramic-polymer electrolyte with high mechanical and electrochemical properties is the key to address the safety issue of high-performance lithium batteries due to the use of flammable organic liquid electrolytes. In this work, we designed and synthesized a flexible low liquid leakage and high wettab... | High safety and long-life lithium batteries with low leakage and high wettability ceramic-polymer electrolyte | 10.1007/s11581-020-03892-z |
2021-03-01 | Abstract X-ray amorphous ribbons of aluminum-based alloys doped with transition (Ni, Fe) and rare earth (La) metals in various ratios were obtained by melt spinning. The mechanical characteristics and fracture surfaces of the ribbons under conditions of uniaxial tension with speeds from 0.01 to 10 mm/min were studied. ... | Low-Temperature Deformation of Al–Ni–Fe–La System Amorphous Alloys | 10.1134/S2075113321020076 |
2021-03-01 | Objective The rapid accumulation of crude-oil based plastics in the environment is posing a fundamental threat to the future of mankind. The biodegradable and bio-based polyhydroxyalkanoates (PHAs) can replace conventional plastics, however, their current production costs are not competitive and therefore prohibiting P... | Low-quality animal by-product streams for the production of PHA-biopolymers: fats, fat/protein-emulsions and materials with high ash content as low-cost feedstocks | 10.1007/s10529-020-03065-y |
2021-03-01 | Abstract The effect of synthesis conditions and incorporation of heteroatoms on the structure and morphology of few-layer graphene nanoflakes is investigated using Raman spectroscopy, X-ray photoelectron spectroscopy, and electron microscopy. It is found that doping with nitrogen forms defects inside graphene layers, w... | Effect of Synthesis Conditions on Morphology, Structure, and Defectiveness of Few-Layer Graphene Nanoflakes | 10.1134/S0036024421030109 |
2021-03-01 | This study presents the results of designing a low-cost air sampler for multi-component analysis of PM 2.5 . We developed a multi-channel air sampling device using sonic venturi (critical nozzle) that supplies a constant airflow rate of 16.7 L/min. The constant flow rate is achieved with a backpressure ratio of 0.8 or ... | Development of A Low-cost Simultaneous Low Volume Air Sampler Controlled with Sonic Venturi | 10.5572/ajae.2020.072 |
2021-03-01 | Metalworking fluids used in industrial workshops may present a major threat to the health of workers who have been exposed to a high oil mist concentration over a long period of time. Therefore, monitoring the temporal and spatial distribution of particulate matter concentration has great practical significance for the... | Low-cost sensor system for monitoring the oil mist concentration in a workshop | 10.1007/s11356-020-11709-9 |
2021-03-01 | Globally, water bodies adjacent to mangroves are considered significant sources of atmospheric CO 2 . We directly measured the partial pressure of CO 2 in water [ p CO 2 (water)] and related biogeochemical parameters with high temporal resolution, covering both diel and tidal cycles, in the mangrove-surrounding waters ... | Low CO2 evasion rate from the mangrove-surrounding waters of the Sundarbans | 10.1007/s10533-021-00769-9 |
2021-03-01 | From sustainable chemistry and engineering perspectives, water and energy consumption are arguably the main issues in the textile industry. Thus, a silicone reverse emulsion dyeing system is developed to dye cellulosic textile with reactive dye. When the amount of dye is the same, the color depth of dyed cotton fiber i... | Sustainable dyeing of cotton fabric with reactive dye in silicone oil emulsion for improving dye uptake and reducing wastewater | 10.1007/s10570-020-03673-x |
2021-03-01 | This paper describes the surface modification of glassy carbon (GC) electrodes with a bamboo-based renewable carbon (RC) before and after an acid functionalization procedure with a sulfonitric solution (1:3 HNO 3 /H 2 SO 4 ). The morphology and structural characterization indicate an increase of functional groups in th... | A functionalized renewable carbon-based surface for sensor development | 10.1007/s10008-020-04882-x |
2021-03-01 | Enteric viruses, such as human norovirus (NoV) and hepatitis A virus (HAV), are the major causes of foodborne illnesses worldwide. These viruses have low infectious dose, and may remain infectious for weeks in the environment and food. Limited information is available regarding viral survival and transmission in low-mo... | Survival and Inactivation by Advanced Oxidative Process of Foodborne Viruses in Model Low-Moisture Foods | 10.1007/s12560-020-09457-7 |
2021-03-01 | Abstract An analysis of the literature on polyethylene terephthalate modification by low-temperature plasma treatment is presented. The use of modern instrumental methods (measurement of contact angles and calculations of surface energy and its components, X-ray photoelectron spectroscopy and FTIR spectroscopy, atomic ... | Modification of Polyethylene Terephthalate by Low-Temperature Plasma for Use in Medicine and Biology | 10.1134/S0018143921020065 |
2021-03-01 | Abstract The study investigated, for the first time with respect to Fischer–Tropsch synthesis of fuels, cobalt-containing catalytic systems based on SAPO-11 molecular sieves with differing secondary porous structure characteristics. Various methods, such as XRD, low-temperature nitrogen adsorption/desorption, SEM, TEM,... | Bifunctional Cobalt-Containing Catalytic Systems Based on
SAPO-11 Molecular Sieves in Fischer–Tropsch Synthesis of Fuels | 10.1134/S0965544121030063 |
2021-03-01 | Abstract A study of the effect of a seasonal decrease in ambient temperature on the composition of free amino acids and ninhydrin-positive secondary metabolites in gastrocnemius muscles of the frog Rana temporaria revealed that at the onset of winter anabiosis, as compared to the summer season, the alanine pool increas... | Low-Temperature Adaptation of the Rana temporaria Gastrocnemius Muscle
at the Onset of Anabiosis | 10.1134/S0022093021020071 |
2021-03-01 | Introduction A novel type of pure permanent cryogenic Delta–Knot Undulator was developed at IHEP to supply a high flux of full adjustable polarization synchrotron radiation with low on-axis power density. This prototype was an active attempt and early exploration for future APPLE–Knot undulator, which will be used at h... | Mechanical design of a cryogenic Delta–Knot undulator for high energy photon source | 10.1007/s41605-020-00228-3 |
2021-03-01 | Urban gardening is growing as an increasingly therapeutic, social, mental, environmental, and economical alternative to improve the quality of life. One of the options to enhance this activity is the use of mulches. There are several reports on the use of cellulose-based mulches in rural areas. This work is the first s... | Bacterial Nanocellulose Mulch as a Potential Greener Alternative for Urban Gardening in the Small-Scale Food Production of Onion Plants | 10.1007/s40003-020-00479-y |
2021-03-01 | We develop a complex technology of fabrication of oil-and-gas pipes with elevated corrosion resistance, including the procedure of controlled forge-rolling of pipe blanks of 06X1-Y steel with regulated contents of chemical elements and the procedure of heat treatment, namely, hardening with double short-term high tempe... | Methods for the Improvement of Corrosion Resistance of Low-Alloy Steel Pipes for the Oil-And-Gas Extraction Industry | 10.1007/s11003-021-00483-9 |
2021-03-01 | The methods of transmission and scanning electron microscopy are used to study the evolution of the structure of a welded joint of steels 32G2 and 40KhN in the thermomechanically affected zone (TAZ) under rotary friction welding (RFW). EBSD analysis is used to certify the microstructure in different parts of the TAZ an... | Evolution of Microstructure in the Thermomechanically Affected Zone of Welded Joints of Medium-Carbon Steels in the Process of Rotary Friction Welding | 10.1007/s11041-021-00630-8 |
2021-03-01 | The South Asian summer monsoon brings copious rain to agriculture-dependent country India and bulk of the precipitation in central India is attributed to monsoon low pressure systems (LPS). Large uncertainty exists in the statistics of LPS during the historical period and in future projections. In this study, we have d... | Characteristics of the monsoon low pressure systems in the Indian subcontinent and the associated extreme precipitation events | 10.1007/s00382-020-05562-2 |
2021-03-01 | Numerous studies have addressed the utilization of polyimide (PI) and silica for improving the properties of hybrid composites. However, the applicability of polyhedral oligomeric silsesquioxanes (POSSs) has not been elucidated. Herein, inorganic nanoparticles containing poly(amic acid)s (PAAs) were synthesized; furthe... | Fabrication and Properties of Glass Fiber-Reinforced Composites Using Polyimide Prepregs with Inorganic Nanofillers | 10.1007/s12221-021-0148-1 |
2021-03-01 | In this study, seven rainfall-runoff models were applied to model daily River Kafu flows from 1952 to 1981. Among others, models from the rainfall-runoff library of the eWater toolkit were applied. Optimal parameters of each model were obtained based on an automatic calibration strategy. Averaging in terms of simple ar... | Suitability of averaged outputs from multiple rainfall-runoff models for hydrological extremes: a case of River Kafu catchment in East Africa | 10.1007/s42108-020-00075-4 |
2021-03-01 | In the automotive industry, it is essential to reduce the weight of the car body to improve fuel efficiency and reduce CO 2 gas emissions. As such, the application of advanced high-strength steels is rapidly increasing. However, in the case of gas metal arc (GMA) welding of advanced high-strength steels (AHSS), slag pa... | Effect of chemical composition of welding consumable on slag formation and corrosion resistance | 10.1007/s40194-020-01059-y |
2021-03-01 | Abstract Small angle neutron scattering was applied to steel produced by rolling with shear (RS) technology and compared to samples produced by standard technology (ST). Based on small angle neutron scattering measurements the morphology of the grains and pores of RS steels were compared to those of the ST steels. The ... | Small Angle Neutron Scattering Study of Nanoscale Structure of Low-Carbon Steel After Rolling with Shear Followed by Cold Drawing | 10.1007/s12540-020-00766-x |
2021-03-01 | The oxidation of oxygen ions and the generation of an anode effect at a low oxygen content of 150 mg/kg were discussed in this paper. Cyclic voltammetry and square-wave voltammetry tests were conducted to explore the anodic processes of LiF–NdF 3 melt after a lengthy period of pre-electrolysis purification at 1000°C (d... | Electrochemical investigation of the anode processes in LiF–NdF3 melt with low oxygen content | 10.1007/s12613-020-2010-7 |
2021-03-01 | Aluminium (Al) toxicity in acid soils inhibits root elongation and development causing reduced water and nutrient uptake by the root system, which ultimately reduces the crop yield. This study established a high throughput hydroponics screening method and identified Al toxicity tolerant accessions from a set of putativ... | New sources of lentil germplasm for aluminium toxicity tolerance identified by high throughput hydroponic screening | 10.1007/s12298-021-00954-y |
2021-03-01 | Industrial Internet of Things (IIoT) is performed based on the multiple sourced data collection, communication, management and analysis from the industrial environment. The data can be generated at every point in the manufacturing production process by real-time monitoring, connection and interaction in the industrial ... | Industrial Internet of Learning (IIoL): IIoT based pervasive knowledge network for LPWAN—concept, framework and case studies | 10.1007/s42486-020-00050-2 |
2021-03-01 | Culture media is classified into several categories depending on their composition or application. Bacterial cellulose (BC) is a promising biomaterial with desirable properties for industrial and commercial applications. Based on that, its production was explored in several works on the modulation of the culture media.... | A review of culture media for bacterial cellulose production: complex, chemically defined and minimal media modulations | 10.1007/s10570-021-03754-5 |
2021-03-01 | The transformations of the electron energy distribution (EEDF), their concentration, and plasma space potential along the discharge gap between the hollow rectangular cathode and the mesh anode were experimentally studied. The discharge was 3 cm long, with a cross-section of 10 cm 2 . A new version of measurements with... | Spatial Variations of Plasma Parameters in a Hollow Cathode Discharge | 10.1007/s11090-020-10137-4 |
2021-03-01 | The use of light-emitting diodes (LEDs) is increasingly used in fishing gears and its application is known to trigger negative or positive phototaxis (i.e., swimming away or toward the light source, respectively) for some marine species. However, our understanding of how artificial light influences behavior is poorly u... | Antarctic krill (Euphausia superba) exhibit positive phototaxis to white LED light | 10.1007/s00300-021-02814-7 |
2021-03-01 | With the fast development of electronic technique, abundant microwave radiation and interference affect the human’s health deeply. Here, a novel low-frequency microwave absorbent of TiO 2 /ZnFe 2 O 4 /ZnTiO 3 nanocomposite was prepared via a combinative route of sol–gel, solvothermal and calcination. The electromagneti... | Effect of nitric acid treatment on the final low-frequency microwave absorption performance of TiO2/ZnFe2O4/ZnTiO3 nanocomposite | 10.1007/s13204-020-01639-w |
2021-03-01 | Mechanical properties as well as crack resistance and stress corrosion cracking (SCC) resistance parameters of ultralow-carbon martensite steels (ULMS) type 05H2G2B and HSLA pipe steel 10G2FB with a different structures depending on processing are investigated. It is shown that despite a higher strength level, SCC resi... | Effect of Structural State on Tendency Towards Stress Corrosion Cracking of Ultralow-Carbon Martensitic and Low-Alloy Pipe Steels | 10.1007/s11015-021-01113-0 |
2021-03-01 | Masson pine ( Pinus massoniana Lamb.) is an economically important conifer tree that can be widely used for timber, pulp, and resin production. However, the phosphate (Pi) deficiency in tropical and subtropical forest soils poses severe challenges for the productivity of masson pine. WRKY transcription factors (TFs) ha... | Transcriptome-Wide Identification and Expression Profiles of Masson Pine WRKY Transcription Factors in Response to Low Phosphorus Stress | 10.1007/s11105-020-01222-1 |
2021-03-01 | This article focuses on ceramic technology at Tell el-Iswid dating to the second half of the fourth millennium BC—Buto IIIa and Naqada III(A2)-B periods. The study investigates the crucial transitional period during the formation of the Egyptian State. It identifies four ceramic technical traditions and examines their ... | The Evolution of Lower Egyptian Culture During the Formative Stages of the Egyptian State at Tell el-Iswid: The Contribution of Ceramic Technology | 10.1007/s10437-020-09421-7 |
2021-03-01 | It is critical to specify a signal that directly drives the transition that occurs between cell states. However, such inferences are often confounded by indirect intercellular communications or secondary transcriptomic changes due to primary transcription factors. Although FGF is known for its importance during mesoder... | FGF primes angioblast formation by inducing ETV2 and LMO2 via FGFR1/BRAF/MEK/ERK | 10.1007/s00018-020-03630-8 |
2021-03-01 | Abstract There is an increasing public awareness about the danger of dietary sugars with respect to their caloric contribution to the diet and the rise of overweight throughout the world. Therefore, low-calorie sugar substitutes are of high interest to replace sugar in foods and beverages. A promising alternative to na... | Degradation of the low-calorie sugar substitute 5-ketofructose by different bacteria | 10.1007/s00253-021-11168-3 |
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