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2021-12-01 | The origin of low δ 18 O signals in zircons from the Early Cretaceous A-type granites in eastern China has long been disputed. It is uncertain whether the 18 O-depleted features were inherited from high-temperature hydrothermal altered source rock or resulted from water-rock interaction after emplacement. In this paper... | Origin of the Low δ18O Signals in Zircons from the Early Cretaceous A-Type Granites in Eastern China: Evidence from the Kulongshan Pluton | 10.1007/s12583-021-1515-y |
2021-12-01 | This paper presents a theory for the power transfer efficiency of printed circuit board coils to integrated circuit coils, with focus on load-dependence for low-power single-chip systems. The theory is verified with electromagnetic simulations modelled on a 350 nm CMOS process which in turn are verified by measurements... | Load-dependent power transfer efficiency for on-chip coils | 10.1007/s10470-021-01904-0 |
2021-12-01 | Abstract Currently, work is under way to create new thermionic reactor-converters. However, when designing an electrogenerating channel, difficulties arise in the complex description of the physical processes occurring in it. Moreover, empirical models of current–voltage characteristics do not always agree with the obt... | Mathematical Model of a Thermionic Converter in a Nuclear Reactor | 10.1134/S1063778821080020 |
2021-12-01 | The preparation of atomically dispersed catalysts with high metal loading remains a formidable challenge due to the high surface energy of single atoms. Here we prepared PtPd/TiO 2 catalysts possessing metal loading as high as 8.17 wt% by a new versatile method which based on metal oxide carriers with abundant oxygen d... | PtPd/TiO2 Catalysts for Low‐Temperature Toluene Oxidation | 10.1007/s10563-021-09335-7 |
2021-12-01 | Abstract Dielectric relaxation spectroscopy is used to study BNKS-18AMN butadiene–nitrile rubber and its vulcanizates modified with low-molecular-weight siloxanes with different substituents on the silicon atoms. It is shown that rubbers are modified due to the structuring action of modifiers capable of both destroying... | Dielectric Spectroscopy Study of the Modification of the Cluster Structures of Butadiene-Nitrile Rubbers and Their Vulcanizates | 10.1134/S0036024421120116 |
2021-12-01 | Termites are dominant soil macro-fauna in tropical forests, yet remain an uncertain component of the carbon budget in many regions. We investigated CH 4 and CO 2 flux patterns from termite mounds and background soils of moist tropical deciduous forests in Indian lower Himalaya from April 2015 till March 2016 using stat... | Methane and Carbon Dioxide Flux Heterogeneity Mediated by Termite Mounds in Moist Tropical Forest Soils of Himalayan Foothills, India | 10.1007/s10021-021-00630-y |
2021-12-01 | The fibrous silica HZSM-5 (HFZ) was synthesized by microemulsion method assisted with ZSM-5 seed crystallization under different amounts of a silica source, tetraethyl orthosilicate (TEOS, 1.0–1.5 mol) for superior benzene methylation activity. The aptness of the physicochemical properties of HFZ offered an abundance o... | Mechanistic insight into low temperature toluene production via benzene methylation over mesopore-rich fibrous silica HZSM-5 zeolite | 10.1007/s10934-021-01121-0 |
2021-12-01 | A batch experiment was conducted to examine the effects of biochar dose and reaction duration on the transformation and immobilization of Cr(VI) in the combined biochar and low-molecular-weight organic acid systems. The results showed that increase in the dosage level of biochar caused increase in the solution pH, part... | Transformation and immobilization of hexavalent chromium in the co-presence of biochar and organic acids: effects of biochar dose and reaction time | 10.1007/s42773-021-00117-y |
2021-12-01 | Abstract Technologies for plasma heating of steel in a continuous caster tundish, plasma-arc remelting nitriding, and metal surface modification are developed using an efficient dc low-temperature plasma generator with a self-adjusting arc length, vortex stabilization, and an expanding gas-discharge channel. The temper... | Application of Low-Temperature Atmospheric-Pressure Plasma in Metallurgy | 10.1134/S0036029521120089 |
2021-12-01 | The internal electrical conductivity in plant stem (ECps) reflects its physiological activity including ion and water transport. Thus, monitoring the ECps can be used to predict physiological changes in plants due to environmental stresses that affect water and ion transport in them. The purpose of this study was to de... | Early detection of plant stress using the internal electrical conductivity of Capsicum annuum in response to temperature and salinity stress | 10.1007/s10725-021-00747-z |
2021-12-01 | Abstract Influence of low-temperature atmospheric pressure plasma generated by a high-resource arc plasmatron in an air mixture with the addition of an inert gas and in pure inert gas on the culture of Paramecium caudatum cells was studied. The effect of the plasma composition and the time of its exposure on the level ... | Effect of Low-Temperature Atmospheric Pressure Plasma on Paramecium caudatum Cell Culture | 10.3103/S0096392521040027 |
2021-12-01 | A further increase in the efficiency of low-temperature plasma modification of the metal product surface layer is possible on the basis of the process supervision. The article presents an approach and a developed model that allows to receive and study the behavior of signals arising in the electrical circuit of a techn... | Substantiation of the technology for controlling the process of low-temperature plasma modification of metal product surface layer by the electrical signal parameters | 10.1007/s00170-021-07258-1 |
2021-12-01 | This investigation was conducted to identify the content of metals in Calluna vulgaris (family Ericaceae ), Empetrum nigrum (family Ericaceae ), Festuca vivipara (family Poaceae ) and Thymus praecox subsp. arcticus (family Lamiaceae ), as well as in the soils where they were growing in eight geothermal heathlands in Ic... | Metals in Calluna vulgaris, Empetrum nigrum, Festuca vivipara and Thymus praecox ssp. arcticus in the geothermal areas of Iceland | 10.1007/s11356-021-15046-3 |
2021-12-01 | Abstract Temperature flammability limits are one of the key indicators of fire and explosion hazard and are used in the development of measures, ensuring fire and explosion safety of production facilities, in the calculation of safe temperature conditions for storage, transportation, and processing of highly flammable ... | Non-Standard Devices for Determination of Temperature Flammability Limits | 10.1134/S1070363221130326 |
2021-12-01 | Flowers have become a part of our daily life, and wind up joining the waste stream, after little use and almost practically no reuse. Disposal of the flowers despite playing an eloquent role in religious faith, rituals, wedding ceremony, etc., finishes up mostly at open dumping or in water bodies. An endeavor has been ... | Renovation of Waste Chrysanthemum morifolium (Marigold) into Valuable Biochar: A Study on the Utilization of Solid Waste by Pyrolysis | 10.1007/s40034-021-00213-5 |
2021-12-01 | A unique low-to-high friction transition is observed during unlubricated sliding in metals with a gradient nano-grained (GNG) surface layer. After persisting in the low-friction state (0.2–0.4) for tens of thousands of cycles, the coefficients of friction in the GNG copper (Cu) and copper-silver (Cu-5Ag) alloy start to... | A low-to-high friction transition in gradient nano-grained Cu and Cu-Ag alloys | 10.1007/s40544-020-0440-x |
2021-12-01 | Abstract Low cycle fatigue (LCF) behaviour and associated failure mechanisms of a thermo-mechanically treated Fe 500D steel rebar have been experimentally evaluated with a view to assess its performance under seismic condition. The total axial strain-controlled LCF tests have been performed at five different strain amp... | Low Cycle Fatigue Performance and Failure Analysis of Reinforcing Bar | 10.1007/s12540-020-00839-x |
2021-12-01 | In the present paper, the damage and life cycle of the last-stage blades (LSB) of a 250-MW low-pressure steam turbine are predicted under low-cycle fatigue conditions. A finite element-based analysis is carried out to compute fatigue life and damage for a blade with a fir-tree root region under the loading condition of... | Low-Cycle Fatigue Life Prediction of LP Steam Turbine Blade for Various Blade–Rotor Fixity Conditions | 10.1007/s11668-021-01282-9 |
2021-12-01 | A novel lipase, Lip486, which has no obvious homology with known lipases, was discovered using functional metagenomics technology. Phylogenetic tree analysis suggested that the enzyme belongs to a new subfamily called lipolytic enzyme family II. To explore the enzymatic properties, lip486 was expressed heterologously a... | An uncharacterized protein from the metagenome with no obvious homology to known lipases shows excellent alkaline lipase properties and potential applications in the detergent industry | 10.1007/s10529-021-03203-0 |
2021-12-01 | The extreme floods in the Middle/Lower Yangtze River Valley (MLYRV) during June−July 2020 caused more than 170 billion Chinese Yuan direct economic losses. Here, we examine the key features related to this extreme event and explore relative contributions of SST anomalies in different tropical oceans. Our results reveal... | Toward Understanding the Extreme Floods over Yangtze River Valley in June–July 2020: Role of Tropical Oceans | 10.1007/s00376-021-1036-8 |
2021-12-01 | The paper presents some research results to recognize the possibility of realization of the idea of a multi-fuel IC engine. Future construction is planned as a flexible solution for military or special purpose transport means and emergency power generation. The proposed engine would utilize compression ignition mode fo... | The experimental verification of the multi-fuel IC engine concept with the use of jet propellant-8 (JP-8) and its blends with pure rapeseed oil | 10.1007/s40095-021-00398-w |
2021-12-01 | To make coal-fired power generation more environmentally friendly, China has initiated a series of ultra-low emission retrofits to the air pollution control (APC) system of the existing power plants. In this study, a life cycle assessment (LCA) is conducted to analyze the environmental net benefits for the typical ultr... | Environmental consequences of an ultra-low emission retrofit in coal-fired power plants from a life cycle perspective | 10.1007/s42768-021-00083-y |
2021-12-01 | Ultrahigh-pressure metamorphism has recently been reported from various crustal rocks in the Seve Nappe Complex (SNC) in which microdiamonds were found. However, in gneiss from the Lower Seve Nappe (LSN), neither any direct petrographic indication for UHP was reported nor the metamorphic evolution was well constrained.... | Pressure-Temperature Evolution of a Mylonitic Gneiss from the Lower Seve Nappe in the Handöl Area, Central Sweden | 10.1007/s12583-021-1413-3 |
2021-12-01 | Abstract Cross-linkers have great importance in textile due to the widespread utilization of cellulosic fibers for clothing. Unfortunately, the acute toxicity of formaldehyde-based resins and the poor performance of non-formaldehyde resins still keep the research door open for scientists in this area. Herein, we demons... | Copper nanoparticles induced, trimesic acid grafted cellulose–an effective, non-hazardous processing approach for multifunctional textile with low chemical induction | 10.1007/s10570-021-04251-5 |
2021-12-01 | Cationization of cotton fabrics was performed by exhaustion procedure utilizing four different reagents provided with quaternary ammonium groups: poly diallyldimethylammonium chloride (PDDACl), poly acrylamide-co-diallyldimethylammonium chloride (PAcD), poly[bis(2-chloroethyl) ether-alt-1,3-bis[3-(dimethylamino)propyl]... | Preparation of cationic cotton through reaction with different polyelectrolytes | 10.1007/s10570-021-04260-4 |
2021-12-01 | In this study, Zinc Oxide/Polyaniline (ZnO/PANI) hybrid was successfully synthesized using the combination of in-situ chemical oxidative polymerization and simple hydrothermal route method which was sequentially exposed to gamma radiation. X-ray diffraction analysis of non-irradiated and irradiated samples indicates th... | Preparation and characterization of gamma irradiated ZnO/PANI hybrid films | 10.1007/s10967-021-08053-8 |
2021-12-01 | We present a low rank approximation approach for topology optimization of parametrized linear elastic structures. The parametrization is considered on loading and stiffness of the structure. The low rank approximation is achieved by identifying a parametric connection among coarse finite element models of the structure... | Robust topology optimization with low rank approximation using artificial neural networks | 10.1007/s00466-021-02069-3 |
2021-12-01 | Characterized by large plastic deformation and energy-dissipation capacity, low-yield-strength steel shear panel dampers (LYSPDs) are widely used as energy-dissipating members in seismic engineering. However, the effect of welding on the properties of LYSPDs remains unclear. Hence, in this study, we investigated the ma... | Welding Performance of Low-Yield-Strength Steel Shear Panel Dampers Under Large Plastic Deformation | 10.1007/s13296-021-00555-1 |
2021-12-01 | Maintaining adequate nitrogen (N) supply to dryland cereal crops remains a critical management issue for optimizing productivity and N-use efficiency. Combinations of crop residue and fertilizer-N inputs can be used to manipulate soil-N supply factors at critical stages of plant N demand. The aim of this study was to u... | Increases in Potentially Mineralizable and Dissolved Organic Nitrogen in a Sandy Surface Soil Fertilized with Nitrogen are Greater with Lupin than Wheat Residues | 10.1007/s42729-021-00578-x |
2021-12-01 | RF MEMS switches have been employed in many commercial and defense applications due to their high potentiality at microwave and millimeter wave frequencies. In this paper, an RF MEMS shunt switch is designed with perforations and without perforations and simulated using iterative meanders for millimeter wave 5G applica... | Low Pull-in-Voltage RF-MEMS Shunt Switch for 5G Millimeter Wave Applications | 10.1007/s42341-021-00304-5 |
2021-12-01 | Abstract —The effects that indolizine derivatives, a tellurium organic compound, rhodanine, sodium diethyldithiocarbamate, and some of their mixtures have on corrosion of steel in 1 M hydrochloric acid are studied by gravimetric analysis, kinetic measurements at different temperatures, polarization measurements, and im... | New Corrosion Inhibitors for Low-Carbon Steel in Hydrochloric Acid Solutions | 10.1134/S2070205121070042 |
2021-12-01 | Special deposition environment makes organic-rich shales in Ningwu Basin have type III kerogen and high kaolinite content, which are also famous as the kaolinite ore. The specific composition of shale in Ningwu Basin can change the pore structure and thus, influence the shale gas storage and transport. This study focus... | Evolution of pore structure in organic shale with type III kerogen and high kaolinite content in Ningwu Basin | 10.1007/s11707-021-0927-4 |
2021-12-01 | Assessment of exposure and mortality attributable to air pollution is one of the most important tasks to inform strategies for mitigation and prevention of the negative effects of degraded air quality. While the vast majority of studies rely on either satellite data or sparse (and expensive) monitoring networks and foc... | Assessing urban mortality from wildfires with a citizen science network | 10.1007/s11869-021-01072-0 |
2021-12-01 | Using the prediction data from the Global Seasonal Forecast version 5 (GloSea5) during the 1993–2016 period, the probabilistic prediction skills of the midsummer (July and August) surface air temperature (SAT) over the middle and lower reach of the Yangtze River valley (MLYR) are evaluated by the ranked probabilistic s... | Asymmetry of probabilistic prediction skills of the midsummer surface air temperature over the middle and lower reach of the Yangtze River valley | 10.1007/s00382-021-05866-x |
2021-12-01 | While the “low salinity waterflooding” (LSWF) has been praised for enhancing oil recovery from different core rocks, the performance of the technique in different wettability environments remains unclear. The consensus is that LSWF does not work well in water-wet carbonate oil reservoirs. The main research objective wa... | The effect of carbonate rock wettability on the performance of low salinity waterflooding: an experimental approach | 10.1007/s13202-021-01309-9 |
2021-12-01 | Understanding permeability evolution caused by the nucleation, propagation and coalescence of cracks enables to better assess fluid migration in the vicinity of underground excavations, boreholes or reservoirs. In this study, we propose a three-dimensional approach combining a bonded particle model and a dual-permeabil... | Discrete Element Modeling of Permeability Evolution During Progressive Failure of a Low-Permeable Rock Under Triaxial Compression | 10.1007/s00603-021-02622-9 |
2021-12-01 | Rapid investment casting based on additive manufacturing has been widely used because of rapid production of patterns without any tooling requirements. However, the precision wax patterns fabricated by commercial additive manufacturing machine directly is costly. The main objective of this study is to demonstrate a cos... | Development of a cost-effective technique for batch production of precision wax patterns using 3D optical inspection and rapid tooling technologies | 10.1007/s00170-021-07763-3 |
2021-12-01 | Silicon photonics has emerged as one of the most prominent technological platforms for photonic integration. Compared with silicon, silicon nitride has a much broader wavelength transparency range, lower propagation loss, and less sensitivity to temperature changes, making it suitable for the manufacture of passive dev... | Characteristics of Crack-Free Silicon Nitride Films Deposited by LPCVD for Photonic Applications | 10.1007/s11664-021-09190-2 |
2021-12-01 | The use of low-cost fused filament fabrication (FFF) machines has been growing in the last years. Being widely used in the industry, the biggest challenges for FFF machines is the difficulty to predict quantitatively the influence of the printing parameters on the printed parts and, consequently, on the printed surface... | Study on 3D printing of gyroid-based structures for superior structural behaviour | 10.1007/s40964-021-00191-5 |
2021-12-01 | The formation of films of barium monosilicide BaSi and dicilicide BaSi 2 on an n -Si(100) substrate of different thicknesses d = 8–800 nm during the low-energy high-dose implantation of barium ions in Si(100) and magnetron sputtering of bulk samples of barium silicides is studied by electron spectroscopy and low-energy... | Formation and Electronic Structure of Barium-Monosilicide- and Barium-Disilicide Films | 10.1134/S1027451022020318 |
2021-12-01 | Purpose It is difficult to perform intestinal anastomosis in low-birth-weight infants because the intestinal diameter is small and the discrepancy in diameter of the proximal and distal intestines is often large, but there has been no optimal-sized training model. Therefore, we developed a new intestinal anastomosis tr... | Face and construct validity assessment of training models for intestinal anastomosis in low-birth-weight infants | 10.1007/s00383-021-04991-2 |
2021-12-01 | This study aimed to investigate the effects of photobiomodulation at a wavelength of 660 and 830 nm at different numbers of application points in the healing of open wounds in mice. In total, 120 mice were divided into 10 groups. The animals were submitted to cutaneous lesion of the open wound type (1.5 × 1.5 cm). Phot... | Comparison of photobiomodulation in the treatment of skin injury with an open wound in mice | 10.1007/s10103-020-03216-7 |
2021-12-01 | With the growth in electroencephalography (EEG) based applications the demand for affordable consumer solutions is increasing . Here we describe a compact, low-cost EEG device suitable for daily use. The data are transferred from the device to a personal server using the TCP-IP protocol, allowing for wireless operation... | Low-cost brain computer interface for everyday use | 10.1007/s00221-021-06231-4 |
2021-12-01 | This paper deals with the development of a portable electronic device that simultaneously measures toxic gases and suspended particles in real time. It is based on a microcontroller board and low-cost sensors including dust sensor, smoke sensor, liquefied petroleum gas sensor, carbon dioxide (CO 2 ) sensor, carbon mono... | Low-cost air quality monitoring system design and comparative analysis with a conventional method | 10.1007/s40095-021-00415-y |
2021-12-01 | Abstract Photosynthetic organisms have developed a set of mechanisms aimed at preventing photo-oxidative reactions in the photosynthetic apparatus (PSA) initiated by excessively absorbed light energy. Along with high irradiance, other stressors, e.g., chilling temperatures, can lead to the absorption of the excess of l... | The Effect of Chilling on the Photosynthetic Apparatus of Microalga Lobosphaera incisa IPPAS C-2047 | 10.1134/S0006297921120087 |
2021-12-01 | Abstract Different ways of synthesizing bis-, tris-, and octakis-adducts of C 60 and C 70 lower fullerenes are considered, and their yield and purity are described. The adducts are identified by physicochemical means: elemental analysis, IR, electron spectroscopy, Raman spectroscopy, HPLC, mass spectrometry, and comple... | Adducts of Lower Fullerenes and Amino Acids: Synthesis, Identification, and Quantum-Mechanical Modeling of Their Physicochemical Properties | 10.1134/S0036024421120049 |
2021-12-01 | Bacteria exposed to environmental stresses often exhibit superior acclimation abilities to environmental change. Acid treatment causes an increase in the cell length of the cyanobacterium Synechocystis sp. PCC6803 under light conditions. We aimed to elucidate the relationship between acidic stress and cell enlargement.... | The lack of the cell division protein FtsZ induced generation of giant cells under acidic stress in cyanobacterium Synechocystis sp. PCC6803 | 10.1007/s11120-020-00792-1 |
2021-12-01 | Wireless transmission of sensor node signal at minimum power consumption and on-site charging of batteries is the key to the success of Wireless Structural Health Monitoring (WSHM) technology. In structures like bridges, vibration-based piezoelectric energy harvesters are generally employed to convert the ambient vibra... | Miniaturized but efficient cantilever beam vibration energy harvesters for wireless bridge health monitoring applications | 10.1007/s00419-021-02058-1 |
2021-12-01 | The beekeeping sector is facing many challenges. One of the greatest is maintaining healthy colonies that produce high-quality products without any residues of veterinary medicines and with low environmental impact. The main enemy is the ectoparasitic mite Varroa destructor , the most significant honeybee pest and a ke... | Three pillars of Varroa control | 10.1007/s13592-021-00903-4 |
2021-12-01 | Abstract The infrared absorption spectra of Ge 14 Sb 29 Te 57 and Ge 15 Sb 15 Te 70 chalcogenide alloys in the amorphous and crystalline states are measured and analyzed in the wave-number range 20–400 cm –1 (0.6–12 THz) at room temperature. Absorption at these frequencies is caused by manifestation of the correlated t... | Optical Properties of the Ge14Sb29Te57 and Ge15Sb15Te70 Phase-Change Materials in the Far-Infrared Range | 10.1134/S1063782621070162 |
2021-12-01 | Exhaust fumes from petrol/diesel-powered electric generators contribute significantly to air pollution in many developing countries, constituting health hazards to both humans and animals. This study evaluated the serum concentrations of Troponin I (TnI), C-reactive protein (CRP) and serum levels/activities of oxidativ... | Effects of Controlled Generator Fume Emissions on the Levels of Troponin I, C-Reactive Protein and Oxidative Stress Markers in Dogs: Exploring Air Pollution-Induced Cardiovascular Disease in a Low-Resource Country | 10.1007/s12012-021-09693-8 |
2021-12-01 | Abstract The possibility of processing and complex use of the domestic low-grade high-silicon aluminum-containing ores is considered. A new method for the separation of aluminum and iron by an electrochemical method in an acidic solution is proposed. The anodic and cathodic processes are considered and their characteri... | Refining of Aluminum-Containing Chloride Solutions from Iron | 10.1134/S0036029521120156 |
2021-12-01 | Gallium nitride (GaN) substrates are promising candidates for GaN high-electron-mobility transistors (HEMTs) because of their epitaxial layer growth with low defect density. We perform device simulations to study the influence of substrate acceptor traps in GaN HEMTs on semiinsulating GaN substrates with a thin (0.02 μ... | A simulation study of the impact of traps in the GaN substrate on the electrical characteristics of an AlGaN/GaN HEMT with a thin channel layer | 10.1007/s10825-021-01809-1 |
2021-12-01 | It is of great significance to study the pore heterogeneity of coal because it affects coalbed methane exploration and exploitation. In this study, mercury intrusion porosimetry (MIP) and low-pressure N 2 adsorption methods were adopted to analyze the multifractal characteristics of coal pore structures with different ... | Multifractal Analysis of Pore Structure in Middle- and High-Rank Coal by Mercury Intrusion Porosimetry and Low-Pressure N2 Adsorption | 10.1007/s11053-021-09952-z |
2021-12-01 | Abstract Synthesis of dimethylmethylphenylsiloxane rubbers with terminal hydroxyl groups by copolymerization of cyclosiloxanes can be accompanied by formation of low-molecular weight compounds, impurities, which are difficult to remove (because of target product affinity) and can lead to rubber opalescence. Identificat... | Composition of Low-Molecular Weight Impurities in Dimethylmethylphenylsiloxane Rubbers with Terminal Hydroxyl Groups | 10.1134/S0020168521140132 |
2021-12-01 | Purpose This research aims to improve the efficiency of phytoremediation of Cd in soil using sunflowers and optimizing the model of Cd uptake by plants. Methods Five low molecular weight organic acids (LMWOAs), oxalic acid (OA), acetic acid (AA), tartaric acid (TA), malic acid (MA), and citric acid (CA) at 2, 4, and 6 ... | Examination of Cd Accumulation Within Sunflowers Enhanced by Low Molecular Weight Organic Acids in Alkaline Soil Utilizing an Improved Freundlich Model | 10.1007/s42729-021-00551-8 |
2021-12-01 | Low back pain is a widespread and poorly understood condition that is frequently diagnosed as non-specific low back pain. We were intrigued by the presence of painful sacroiliac nodules in patients with this condition. We conducted a historical review to elucidate this relationship. This chronicled review summarizes th... | Historical Review of Studies on Sacroiliac Fatty Nodules (Recently Termed “Back Mice”) as a Potential Cause of Low Back Pain | 10.1007/s40122-021-00321-5 |
2021-12-01 | Low light conditions not only induce leaf senescence, but also photosynthetic acclimation. This study aimed to determine whether plants exhibit photosynthetic acclimation during low-light-induced leaf senescence. The influences of shading on leaf senescence and photosynthetic acclimation were explored in post-anthesis ... | Photosynthetic acclimation during low-light-induced leaf senescence in post-anthesis maize plants | 10.1007/s11120-021-00851-1 |
2021-12-01 | Key message The roles of root exudates are not to directly solubilize P bound to non-crystalline minerals but to increase organic-P and plant-available P through priming effects for microbes on volcanic soils. Abstract Volcanic soils are generally characterized by low phosphorus (P) availability for plants because the ... | Effects of tree-root exudates on the solubilization of phosphorus adsorbed to non-crystalline minerals in the rhizosphere volcanic soils on Yakushima Island, Japan | 10.1007/s00468-021-02170-3 |
2021-12-01 | To address the problem of dietary restraint of health-conscious people, a techno-feasible process for development of low-fat and high-fibre fabricated potato snack has been standardised. The product was optimised on the basis of fat and fibre content, browning index, hardness, crunchiness, and overall acceptability (OA... | Utilisation of Potato Peel in Fabricated Potato Snack | 10.1007/s11540-021-09492-2 |
2021-12-01 | Three novel halophilic archaea were isolated from seawater and sediment near Yeoungheungdo Island, Republic of Korea. The genome size and G + C content of the isolates MBLA0076 T , MBLA0077 T , and MBLA0078 T were 3.56, 3.48, and 3.48 Mb and 61.7, 60.8, and 61.1 mol%, respectively. The three strains shared 98.5–99.5 % ... | Haloferax litoreum sp. nov., Haloferax marinisediminis sp. nov., and Haloferax marinum sp. nov., low salt-tolerant haloarchaea isolated from seawater and sediment | 10.1007/s10482-021-01661-0 |
2021-12-01 | In this paper, we extend our study of mass transport in multicomponent isothermal fluids to the incompressible case. For a mixture, incompressibility is defined as the independence of average volume on pressure, and a weighted sum of the partial mass densities stays constant. In this type of models, the velocity field ... | Well-posedness analysis of multicomponent incompressible flow models | 10.1007/s00028-021-00712-3 |
2021-12-01 | Coalbed methane is a lucrative energy source, but its development relies heavily on the fracturing of coal seam and underground extraction during mining. This study of mining stress paths, pore pressure, and permeability of a coal body was aimed to overcome the constraints of low coal permeability under the stress appl... | Repetitive Mining Stress and Pore Pressure Effects on Permeability and Pore Pressure Sensitivity of Bituminous Coal | 10.1007/s11053-021-09902-9 |
2021-12-01 | Abstract Tissue regeneration following radiotherapy occurs due to the survival and regenerative abilities of tissue stem cells and resident or invading mesenchymal stem cells (MSCs), and their functional characteristics depend significantly on their sensitivity to ionizing radiation. The aim of this work was to study t... | Features of the Response of Long-Term Cultured Adipose Tissue–Derived Mesenchymal Stem Cells to γ-Irradiation | 10.1134/S1062359021110078 |
2021-12-01 | Saldigones A–C ( 1 , 3 , 4 ), three new isoprenylated flavonoids with diverse flavanone, pterocarpan, and isoflavanone architectures, were characterized from the roots of Salvia digitaloides , together with a known isoprenylated flavanone ( 2 ). Notably, it’s the first report of isoprenylated flavonoids from Salvia spe... | Isoprenylated Flavonoids as Cav3.1 Low Voltage-Gated Ca2+ Channel Inhibitors from Salvia digitaloides | 10.1007/s13659-021-00307-y |
2021-12-01 | Determination of tritium along Danube River Banks, in shallow waters, from Baziaş to Sulina, led to an average value of 29 TU and to a slight increasing tendency. Upstream/downstream “signatures” of Kozloduy NPP and Cernavoda NPP, and lower values on the left bank than on right bank in Romania, between Ostrov and Tulce... | Tritium along the banks of the Danube and the Black Sea shore of Romania | 10.1007/s10967-021-07975-7 |
2021-12-01 | Macrophage to foam cell transition and their accumulation in the arterial intima are the key events that trigger atherosclerosis, a multifactorial inflammatory disease. Previous studies have linked arterial stiffness and cardiovascular disease and have highlighted the use of arterial stiffness as a potential early-stag... | Inflammation Drives Stiffness Mediated Uptake of Lipoproteins in Primary Human Macrophages and Foam Cell Proliferation | 10.1007/s10439-021-02881-1 |
2021-12-01 | Water treatment for human uses is a vital asset to economic development. This article focuses on a combination of physical, biological, and chemical processes. Methods of water treatment require concrete or steel base structures, rendering them heavy, costly, and time-consuming to establish. Water treatment systems sho... | Water purification plantations for oil and gas industries in Iran | 10.1007/s11356-021-15819-w |
2021-12-01 | Purpose Increasing the migration of arsenic in contaminated soil is an important topic in the field of soil remediation. The purpose of this study was to investigate the enhancement of arsenic migration in soil by low molecular weight organic acids. Materials and methods Four different low molecular weight organic acid... | Enhanced mobilization of arsenic from tailing soil by four types of low molecular weight organic acids with different functional groups | 10.1007/s11368-021-03057-z |
2021-12-01 | Optimized high-performance thin-layer chromatography‒bioautography screening of Ecuadorian Chenopodium quinoa Willd. leaf extracts for inhibition of α-amylase | 10.1007/s00764-021-00140-6 | |
2021-12-01 | Purpose We previously reported beneficial glucoregulatory effects of a fully provided carbohydrate-reduced, high-protein (CRHP) diet in patients with type 2 diabetes mellitus (T2DM) in a crossover 2 × 6-week trial, in which patients maintained their body weight. Here, we investigated physiological changes during an add... | Body weight and metabolic risk factors in patients with type 2 diabetes on a self-selected high-protein low-carbohydrate diet | 10.1007/s00394-021-02605-0 |
2021-12-01 | Abstract The analytical capabilities of arc optical emission spectroscopy have been studied for purposes of monitoring the impurities in kaolin clays, the initial feedstock for production of metallurgical alumina. The compositions of samples were preliminarily estimated by semiquantitative X-ray fluorescent analysis. A... | Arc Optical Emission Spectroscopy of Initial Feedstock for Production of Metallurgical Alumina | 10.1134/S0020168521140065 |
2021-12-01 | The organic integration of food security and agricultural mechanization has become a challenge to realize a low-carbon economy, which helps promote carbon peaking and carbon neutralization. In this work, a simultaneous equation model has developed to analyze the relationship between food security, agricultural automati... | Relationship and integrated development of low-carbon economy, food safety, and agricultural mechanization | 10.1007/s11356-021-15465-2 |
2021-12-01 | Benzene is volatile organic hydrocarbon which is widely used in a wide range of industries. Studies have shown that exposure to benzene consequences serious health risks for human. Understanding the effect and risks of environmental hazard materials in the laser therapy of skin is interesting which can show useful or h... | Effect of low-level laser irradiation on cytotoxicity of benzene in human normal fibroblast cells | 10.1007/s10103-020-03211-y |
2021-12-01 | Abstract Envenomation by the pit viper Bothrops jararacussu (jararacuçu) ( B. jararacussu ) causes local effects, such as pain, swelling, inflammation, haemorrhage and myonecrosis. Purpose The objective of this study was to examine the effects of ozonated oil therapy (OZT) associated with photobiomodulation therapy (PB... | The use of ozone therapy and photobiomodulation therapy to treat local effects of Bothrops jararacussu snake venom | 10.1007/s42600-021-00184-x |
2021-12-01 | Background Anogenital warts are a common human papillomavirus infection. They cause emotional distress, especially when they are in the anogenital region. Cryotherapy is a first-line treatment. Previous clinical trials and case series have reported variable results with retinoids (isotretinoin) as adjuvant therapy. Obj... | Cryotherapy plus low-dose oral isotretinoin vs cryotherapy only for the treatment of anogenital warts: a randomized clinical trial | 10.1007/s00403-020-02182-y |
2021-12-01 | I argue that high level causal relationships are often more fundamental than low level causal relationships. My argument is based on some general principles governing when one causal relationship will metaphysically ground another—a phenomenon I term derivative causation . These principles are in turn based partly on o... | Building low level causation out of high level causation | 10.1007/s11229-021-03231-3 |
2021-12-01 | Individuals with chronic low back pain (cLBP) frequently report sleep disturbances. Living in a neighborhood characterized by low-socioeconomic status (SES) is associated with a variety of negative health outcomes, including poor sleep. Whether low-neighborhood SES exacerbates sleep disturbances of people with cLBP, re... | Sleep and neighborhood socioeconomic status: a micro longitudinal study of chronic low-back pain and pain-free individuals | 10.1007/s10865-021-00234-w |
2021-12-01 | To gain insight into the potential protective mechanisms of low phenylalanine diet (LPD) in phenylketonuria (PKU), gene expression profiles were studied in the cerebral cortex and hippocampus of a PKU mouse model (BTBR- Pah enu2 ). PKU mice were fed with low Phe diet (LPD-PKU group) and normal diet (PKU group). Wild-ty... | Gene expression profiles in the brain of phenylketonuria mouse model reversed by the low phenylalanine diet therapy | 10.1007/s11011-021-00818-0 |
2021-12-01 | Abstract —The vitality structure of 23 natural coenopopulations of Colchicum bulbocodium subsp. versicolor from the Lower Volga region has been analyzed in 2014–2019. During this period, the viability of coenopopulations of the studied region varied within a wide range (from 0.45 to 1.51). Comparing to coenopopulations... | Vitality Structure of Colchicum bulbocodium subsp. versicolor (Colchicaceae, Liliopsida) Populations in the Lower Volga Region | 10.1134/S1062359021100290 |
2021-11-26 | Background This study was performed to investigate the mid-term results of Ti-Nb-Sn (TNS) alloy stem with a low Young’s modulus. Methods This study was a multicenter prospective cohort study. A total of 40 primary total hip arthroplasties performed between April 2016 and September 2017 was enrolled in this study. With ... | Mid-term results of a new femoral prosthesis using Ti-Nb-Sn alloy with low Young’s modulus | 10.1186/s12891-021-04879-1 |
2021-11-26 | In this work, we have described a very simple and low metal loading copper-based ionic liquid as solvent and catalyst for regioselective synthesis of 1,4-disubstituted-1,2,3-triazoles. The proposed protocol proved its efficiency by showing excellent tolerance to a large array of electronically diverse substrates withou... | Cu(II) ionic liquid promoted Simple and Economical Synthesis of 1,4-disubstituted-1,2,3-triazoles with Low Catalyst Loading | 10.1007/s12039-021-01980-9 |
2021-11-25 | Background Although lower temperature (< 45 °C) photothermal therapy (LPTT) have attracted enormous attention in cancer therapy, the therapeutic effect is still unsatisfying when applying LPTT alone. Therefore, combining with other therapies is urgently needed to improve the therapeutic effect of LPTT. Recently reporte... | Mitochondria-targeted accumulation of oxygen-irrelevant free radicals for enhanced synergistic low-temperature photothermal and thermodynamic therapy | 10.1186/s12951-021-01142-6 |
2021-11-25 | Background Osteonecrosis of the femoral head (ONFH) is a common but intractable disease that appears to involve lipid metabolic disorders. Although numerous studies have demonstrated that high blood levels of low-density lipoprotein (LDL) are closely associated with ONFH, there is limited evidence to explain the pathol... | Accumulation of LDL/ox-LDL in the necrotic region participates in osteonecrosis of the femoral head: a pathological and in vitro study | 10.1186/s12944-021-01601-x |
2021-11-24 | Low-carbon materials (the ‘carbon’ is related to carbon dioxide emission potential and not elemental carbon) need to be developed and embraced ubiquitously for the sustainable development of human society and mitigate climate change. In the absence of clear consensus in the literature coupled with the presence of certa... | Demystifying Low-Carbon Materials | 10.1007/s42824-021-00044-0 |
2021-11-22 | The Vector Electric Field Investigation (VEFI) on the C/NOFS satellite comprises a suite of sensors controlled by one central electronics box. The primary measurement consists of a vector DC and AC electric field detector which extends spherical sensors with embedded pre-amps at the ends of six, 9.5-m booms forming thr... | The Vector Electric Field Investigation (VEFI) on the C/NOFS Satellite | 10.1007/s11214-021-00859-y |
2021-11-19 | This study involves the preparation of ruthenium oxide (RuO 2 ) thick films by a different method than those reported in the literature and the investigation of their dielectric properties. The substrates were coated with RuO 2 thick films deposited using a mixture of invertase enzyme and ruthenium ions dissolved in wa... | Synthesis and characterization of RuO2 thick film supercapacitor electrode: the effect of low temperature | 10.1007/s12034-021-02573-5 |
2021-11-19 | The CoSb 3 -based skutterudite, as a medium-temperature thermoelectric material, shows excellent thermoelectric performance, but intrinsic high thermal conductivity suppresses enhancement of the ZT value. Here, the Yb 0.2 (CoSb 2.875 Te 0.125 ) 4 sample was synthesized by the melting reaction, high energy ball milling ... | Enhanced thermoelectric properties from pore design via adjustment and elimination of residual stresses for Yb0.2(CoSb2.875Te0.125)4 | 10.1007/s00339-021-05087-3 |
2021-11-16 | Background The National Drug Policy in Bangladesh prohibits the sale and distribution of antibiotics without prescription from a registered physician. Compliance with this policy is poor; prescribing antibiotics by unqualified practitioners is common and over-the-counter dispensing widespread. In Bangladesh, unqualifie... | Barriers and facilitators to adherence to national drug policies on antibiotic prescribing and dispensing in Bangladesh | 10.1186/s40545-021-00342-7 |
2021-11-14 | Necrotizing enterocolitis (NEC) is a typical disorder of preterm newborns, with a high mortality and morbidity rate. The therapeutic and nutritional management of disease depends on several factors. Its prognosis is linked, in addition to the severity of the disease and the need for surgery, to a correct enteral feedin... | Necrotizing enterocolitis in the preterm: newborns medical and nutritional Management in a Single-Center Study | 10.1186/s13052-021-01180-8 |
2021-11-12 | We consider near-critical two-dimensional statistical systems with boundary conditions inducing phase separation on the strip. By exploiting low-energy properties of two-dimensional field theories, we compute arbitrary n -point correlation of the order parameter field. Finite-size corrections and mixed correlations inv... | Multipoint correlation functions at phase separation. Exact results from field theory | 10.1007/JHEP11(2021)096 |
2021-11-10 | Background Single-cell RNA sequencing (scRNA-seq) provides new insights to address biological and medical questions, and it will benefit more from the ultralow input RNA or subcellular sequencing. Results Here, we present a highly sensitive library construction protocol for ultralow input RNA sequencing (ulRNA-seq). We... | Optimization of library preparation based on SMART for ultralow RNA-seq in mice brain tissues | 10.1186/s12864-021-08132-w |
2021-11-09 | We have performed a search for flares and quasi-periodic pulsations (QPPs) from low-mass M-dwarf stars using Transient Exoplanet Survey Satellite (TESS) two-minute cadence data. We find seven stars that show evidence of QPPs. Using Fourier and empirical mode decomposition techniques, we confirm the presence of 11 QPPs ... | Transiting Exoplanet Survey Satellite (TESS) Observations of Flares and Quasi-Periodic Pulsations from Low-Mass Stars and Potential Impact on Exoplanets | 10.1007/s11207-021-01899-x |
2021-11-08 | The low cycle fatigue strength properties of the additively manufactured Ti-6Al-4V alloy are experimentally investigated under proportional and nonproportional multiaxial loading. The fatigue tests were conducted using hollow cylinder specimens with and without heat treatments, at room temperature in air. Two fatigue t... | Fatigue Property of Additively Manufactured Ti-6Al-4V under Nonproportional Multiaxial Loading | 10.1186/s10033-021-00626-8 |
2021-11-06 | Background Induction of long-term synaptic depression (LTD) is proposed as a treatment mechanism for chronic pain but remains untested in clinical populations. Two interlinked studies; (1) A patient-assessor blinded, randomised, sham-controlled clinical trial and (2) an open-label mechanistic study, sought to examine t... | Mechanistically informed non-invasive peripheral nerve stimulation for peripheral neuropathic pain: a randomised double-blind sham-controlled trial | 10.1186/s12967-021-03128-2 |
2021-11-05 | Hatis-1 is a Lower Paleolithic open-air site on the Hrazdan-Kotayk Plateau of central Armenia. Although the site was tested in the 1980s, little has been published regarding the material. Consequently, we reinvestigated the site by expanding the original test pit to better understand the stratigraphy and recover a new ... | The Techno-typological and 3D-GM Analysis of Hatis-1: a Late Acheulian Open-Air Site on the Hrazdan-Kotayk Plateau, Armenia | 10.1007/s41982-021-00105-5 |
2021-11-04 | Background Plant health and growth are negatively affected by pathogen invasion; however, plants can dynamically modulate their rhizosphere microbiome and adapt to such biotic stresses. Although plant-recruited protective microbes can be assembled into synthetic communities for application in the control of plant disea... | A simplified synthetic community rescues Astragalus mongholicus from root rot disease by activating plant-induced systemic resistance | 10.1186/s40168-021-01169-9 |
2021-11-04 | The proximate, low-pressure N 2 sorption, X-ray diffraction, and organic petrography parameters have been used to delineate the pore structures and fractal dimensions in the Barakar shales of Rajmahal Basin, India. The information has been utilized for the assessment of shale gas reservoir and to know about the mode of... | Pore structures and fractal dimensions in Early Permian Barakar shales of Rajmahal Basin, Jharkhand, India | 10.1007/s12517-021-08373-9 |
2021-11-04 | Background Gastroesophageal reflux disease (GERD) is associated with lower esophageal sphincter (LES) incompetence. In some patients, GERD is refractory to acid reduction therapy which is the main treatment for GERD. So far, medications that can increase LES tone are few. Arecae pericarpium (A. pericarpium) is a medica... | Arecae pericarpium extract induces porcine lower-esophageal-sphincter contraction via muscarinic receptors | 10.1186/s12906-021-03442-8 |
2021-11-03 | Geomagnetic storms are an important aspect of space weather and can result in significant impacts on space- and ground-based assets. The majority of strong storms are associated with the passage of interplanetary coronal mass ejections (ICMEs) in the near-Earth environment. In many cases, these ICMEs can be traced back... | Understanding the Origins of Problem Geomagnetic Storms Associated with “Stealth” Coronal Mass Ejections | 10.1007/s11214-021-00857-0 |
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