874,003 results match your criteria energy


Effect of energy requirements in the growth of brain tumor: a theoretical approach.

Biomed Phys Eng Express 2021 Oct 15. Epub 2021 Oct 15.

Pathology, Armed Forces Medical College, Wanowarie, Pune, Pune, Maharashtra, 411040, INDIA.

A malignant tumor is an uncontrolled growth of tissues receiving energy in form of the nutrients provided by the microvascular networks. It is proposed that the supplied energy to a tumor is used for three purposes: the creation of new cells, maintenance of tumor cells, and tumor volume expansion by overcoming external pressure. A mathematical model studying the effects of energy required for maintenance and overcoming external pressure, energy required creating a single cell, death rate, and tumor cell density on tumor development has been formulated. Read More

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October 2021

Study of structural, electronic and magnetic properties of Ti doped Co2FeGe Heusler alloy: Co2Fe1-xTixGe (x= 0, 0.5, and 0.75).

J Phys Condens Matter 2021 Oct 15. Epub 2021 Oct 15.

Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur, Kharagpur, West Bengal, 721302, INDIA.

Tunability of structural, magnetic and electronic properties of Co2FeGe Heusler alloy is experimentally demonstrated by doping Ti in the Fe site (i.e. Co2Fe1-xTixGe), followed by in-depth first principle calculations. Read More

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October 2021

Quantum shape oscillations in the thermodynamic properties of confined electrons in core-shell nanostructures.

J Phys Condens Matter 2021 Oct 15. Epub 2021 Oct 15.

Physics and Astronomy, Uppsala Universitet, Angströmlaboratoriet, Lagerhyddsvagen 1, Uppsala, 751 20, SWEDEN.

Quantum shape effect appears under the size-invariant shape transformations of strongly confined structures. Such a transformation distinctively influences the thermodynamic properties of confined particles. Due to their characteristic geometry, core-shell nanostructures are good candidates for quantum shape effects to be observed. Read More

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October 2021

Electroreduction of CO2 to ethanol by electrochemically deposited Cu-lignin complexes on Ni foam electrodes.

Nanotechnology 2021 Oct 15. Epub 2021 Oct 15.

Administration, Indian Institute of Technology Delhi, Dept of Chemical Eng.,, Indian Institute of Tech Delhi, Hauz Khas, New Delhi, New Delhi, 110016, INDIA.

A low cost, non-toxic and highly selective catalyst based on a Cu-lignin molecular complex is developed for CO2 electroreduction to ethanol. Ni foam (NF), Cu-Ni foam (Cu-NF) and Cu-lignin-Ni foam (Cu-lignin-NF) were prepared by a facile and reproducible electrochemical deposition method. The electrochemical CO2 reduction activity of Cu-lignin-NF was found to be higher than Cu-NF. Read More

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October 2021

A current collect-free Li1.2Ni0.13Co0.13Mn0.54O2 flexible film for high-performance lithium-ion batteries.

Nanotechnology 2021 Oct 15. Epub 2021 Oct 15.

Department of Physics, Nanchang University, 999 Xuefu Avenue, Honggutan District, Nanchang City, Jiangxi Province, Nanchang, Jiangxi, 330031, CHINA.

Due to the high demand for more convenient flexible devices, there are more requirements for higher performance of flexible batteries. The layered lithium-rich manganese-based Li1.2Ni0. Read More

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October 2021

Simple parameters of synthetic MRI for assessment of bone density in patients with spinal degenerative disease.

J Neurosurg Spine 2021 Oct 15:1-8. Epub 2021 Oct 15.

1Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan.

Objective: Good bone quality is the key to avoiding osteoporotic fragility fractures and poor outcomes after lumbar instrumentation and fusion surgery. Although dual-energy x-ray absorptiometry (DEXA) screening is the current standard for evaluating osteoporosis, many patients lack DEXA measurements before undergoing lumbar spine surgery. The present study aimed to investigate the utility of using simple quantitative parameters generated with novel synthetic MRI to evaluate bone quality, as well as the correlations of these parameters with DEXA measurements. Read More

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October 2021

Guided rational design with scaffold hopping leading to novel histamine H receptor ligands.

Bioorg Chem 2021 Oct 8;117:105411. Epub 2021 Oct 8.

Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; School of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran. Electronic address:

During the past decades, histamine H receptors have received widespread attention in pharmaceutical research due to their involvement in pathophysiology of several diseases such as neurodegenerative disorders. In this context, blocking of these receptors is of paramount importance in progression of such diseases. In the current investigation, novel histamine H receptor ligands were designed by exploiting scaffold-hopping drug-design strategy. Read More

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October 2021

Multimodal obstruction of tumorigenic energy supply via bionic nanocarriers for effective tumor therapy.

Biomaterials 2021 Oct 9;278:121181. Epub 2021 Oct 9.

Department of Chemical Engineering, Shaanxi Key Laboratory of Energy Chemical Process Intensification, Institute of Polymer Science in Chemical Engineering, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, 710049, China. Electronic address:

Sufficient energy generation based on effective transport of nutrient via abundant blood vessels in tumor tissue and subsequent oxidative metabolism in mitochondria is critical for growth, proliferation and migration of tumor. Thus the strategy to cut off this transport pathway (blood vessels) and simultaneously close the power house (mitochondria) is highly desired for tumor treatment. Herein, we fabricated a bionic nanocarrier with core-shell-corona structure to give selective and effective tumor therapy via stepwise destruction of existed tumor vessel, inhibition of tumor angiogenesis and dysfunction of tumor mitochondria. Read More

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October 2021

Polyimide based super-wettable membranes/materials for high performance oil/water mixture and emulsion separation: A review.

Adv Colloid Interface Sci 2021 Sep 23;297:102525. Epub 2021 Sep 23.

Department of Physics, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.

This article reviews the application of highly heat and pressure resistant polyimide material for the development of membranes/materials that exhibit unique super-wettability, the characteristics pivotal for the efficient separation of oil-water mixture and emulsion. The polymerization of imide monomer in polyimide brings about the required porosity in the material, which in turn renders the crucial surface roughness, which is instrumental for establishing the desired super-wettability on the polyimide based membrane materials, in addition to the mechanical and thermal robustness. The membrane as the oil-water filtering medium can be either oil passing or water passing depends on the individual wettability of the membrane surface for oil and water, which in turn depend on the respective solid-liquid interfacial energy and the hierarchical surface roughness. Read More

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September 2021

Dependence of photon registration efficiency on LaBr(Ce) detector orientation for in situ radionuclide monitoring.

Appl Radiat Isot 2021 Oct 2;178:109974. Epub 2021 Oct 2.

The Maria Sklodowska-Curie National Research Institute of Oncology, Roentgena 5 Str., 02-781, Warsaw, Poland. Electronic address:

Knowledge of a radiation detector's numerical characteristics allows its energy efficiency to be calibrated theoretically for any measurement geometry. Here, energy efficiency calibration is discussed for oriented LaBr(Ce) detectors used for in situ radiation monitoring. Vertical and horizontal detector orientations relative to the ground surface are compared using efficiency calibrations based on the detector's numerical characteristics and are equally effective. Read More

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October 2021

Secondary PVC microplastics are more toxic than primary PVC microplastics to Oryzias melastigma embryos.

J Hazard Mater 2021 Oct 5;424(Pt B):127421. Epub 2021 Oct 5.

Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, USA.

Irregular-shaped and partially degraded secondary microplastics (SMP) account for the majority of MPs in marine environments, yet little is known about their effects on marine organisms. In this study, we investigated the embryotoxicity of polyvinyl chloride SMP and primary microplastics (PMP) to the marine medaka Oryzias melastigma. This study aimed to determine the physical impacts of MPs and, for the first time, elucidate the underlying mechanisms of physical toxicity. Read More

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October 2021

Conversion of plastic waste into fuels: A critical review.

J Hazard Mater 2021 Oct 8;424(Pt B):127460. Epub 2021 Oct 8.

School of Chemical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia.

Plastic wastes have posed serious threats to the environment, including decrease of soil nutrient effectiveness and agricultural production as well as emerge of ecological instability. Fuel conversion from plastic waste is regarded as a promising strategy for its disposal and energy utilization. Plastic wastes can be converted into target fuels by adjusting cracking of chemical bonds. Read More

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October 2021

Introduction of N-containing moieties by ammonia plasma technique can substantially improve ciprofloxacin removal by biochar and the associated mechanisms: Spectroscopic and site energy distribution analysis.

J Hazard Mater 2021 Oct 5;424(Pt B):127438. Epub 2021 Oct 5.

Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China. Electronic address:

A low-temperature plasma device was developed to introduce N-containing moieties into biochar type CS-300 to improve ciprofloxacin removal. The sorption capacity of ciprofloxacin by the treated biochars was 2.61-4. Read More

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October 2021

Long-term performance, membrane fouling behaviors and microbial community in a hollow fiber anaerobic membrane bioreactor (HF-AnMBR) treating synthetic terephthalic acid-containing wastewater.

J Hazard Mater 2021 Oct 8;424(Pt B):127458. Epub 2021 Oct 8.

Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China; Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai 200241, PR China; Shanghai Institute of Pollution Control and Ecological Security, 1515 North Zhongshan Rd. (No. 2), Shanghai 200092, PR China; Technology Innovation Center for Land Spatial Eco-restoration in Metropolitan Area, Ministry of Natural Resources, 3663 N. Zhongshan Road, Shanghai 200062, PR China. Electronic address:

Purified terephthalic acid (PTA) wastewater with properties of poor biodegradation and high toxicity is produced from refining and synthesis of petrochemical products. In this study, a lab-scale hollow fiber membrane bioreactor (HF-AnMBR) fed with synthetic PTA wastewater was operated over 200 days with stepwise decreased hydraulic retention time (HRT) to investigate the long-term performance, membrane fouling mechanism and microbial community evolution. Results showed that a stable chemical oxygen demand (COD) removal rate of 65. Read More

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October 2021

Carbon footprint of different recovery options for the repulping reject from liquid packaging board waste treatment process.

Waste Manag 2021 Oct 13;136:93-103. Epub 2021 Oct 13.

Lappeenranta-Lahti University of Technology LUT, School of Energy System, Department of Sustainability Science, Yliopistonkatu 34, P.O. Box 20, 53851 Lappeenranta, Finland.

Liquid packaging board (LPB) is an integral part of storing and transporting liquid food. In addition to its significant advantages, LPB has been challenging the existing waste management sector since its introduction into the market. In most European countries, LPB waste is either incinerated or recycled in the recycling facilities where fibre is recycled, and the repulping reject is separated for incineration. Read More

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October 2021

Corrigendum to "Carbon dioxide reduction to multicarbon hydrocarbons and oxygenates on plant moss-derived, metal-free, in situ nitrogen-doped biochar" [Sci. Total Environ. 739 (2020) 140340].

Sci Total Environ 2021 Oct 12;807(Pt 2):150798. Epub 2021 Oct 12.

Guangzhou Institute of Energy Conversion, CAS Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, China; The Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510650, China.

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October 2021

Diversified metabolism makes novel Thauera strain highly competitive in low carbon wastewater treatment.

Water Res 2021 Oct 7;206:117742. Epub 2021 Oct 7.

School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi Province 710055, China; School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi Province 710049, China. Electronic address:

Thauera, as one of the core members of wastewater biological treatment systems, plays an important role in the process of nitrogen and phosphorus removal from low-carbon source sewage. However, there is a lack of systematic understanding of Thauera's metabolic pathway and genomics. Here we report on the newly isolated Thauera sp. Read More

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October 2021

Comparison of tobacco use in a university town and a nearby urban area in China by intensive analysis of wastewater over one year period.

Water Res 2021 Oct 3;206:117733. Epub 2021 Oct 3.

Queensland Alliance for Environmental Health Sciences (QAEHS), The University of Queensland, 20 Cornwall Street, Woolloongabba, Brisbane 4102, Australia.

Understanding smoking patterns in the population is essential for formulating public health and tobacco control policies. Wastewater-based epidemiology (WBE) is a valuable complementary approach to conventional survey methods to measure tobacco use, providing non-invasive information in an objective and cost-effective manner. This study estimates tobacco use in an urban population at daily resolution and in a university town at weekly resolution in China. Read More

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October 2021

Surface functionalization of boron nitride nanosheet with folic acid: Toward an enhancement in Doxorubicin anticancer drug loading performance.

J Mol Graph Model 2021 Oct 6;109:108041. Epub 2021 Oct 6.

Chemistry Department, University of Birjand, Iran.

Loading of the Doxorubicin (DOX) as an anticancer drug molecule on boron nitride (BN) nanosheets with different sizes, in the presence and absence of Folic Acid (FA) functional groups, are investigated using molecular dynamic simulations. The obtained results from these investigations revealed that the drug molecules are spontaneously adsorbed the carriers and form stable complexes. It is also shown that an increase the nanosheet leads to an enhancement in its capacity to adsorb the drugs. Read More

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October 2021

Trans-resveratrol electrochemical detection using portable device based on unmodified screen-printed electrode.

J Pharm Biomed Anal 2021 Oct 7;207:114399. Epub 2021 Oct 7.

Laboratório de Materiais, Macromoleculas e Compósitos (LaMMAC), Universidade Tecnológica Federal do Paraná (UTFPR), Rua Marcílio Dias 635, 86812-460 Apucarana, State of Paraná, Brazil. Electronic address:

Trans-resveratrol (t-RESV) is an important and natural polyphenolic antioxidant generally found in grapes and in its derivatives such as red wine and grape juices. The t-RESV has been explored in the pharmaceutical industry for its anti-inflammatory, anti-cancer, and neuroprotective properties. The t-RESV electrochemical determination has basically been carried out using modified electrodes-based sensors. Read More

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October 2021

Bioaugmentation improves batch psychrophilic anaerobic co-digestion of cattle manure and corn straw.

Bioresour Technol 2021 Oct 12;343:126118. Epub 2021 Oct 12.

Laboratory of Biomass Bio-chemical Conversion, GuangZhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China. Electronic address:

Low temperatures result in poor anaerobic digestion (AD). To investigate whether bioaugmentation can improve anaerobic co-digestion of cattle manure and corn straw at 20 °C, five different doses of methanogenic propionate-degrading culture (4%, 8%, 12%, 14%, and 16%) were added to batch AD systems to compare bioaugmentation performance. The results showed that the methane production of all the bioaugmented digesters was enhanced compared to the control, increasing 2. Read More

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October 2021

Integrated Polylactic Acid and Biodiesel Production from Food Waste: Process Synthesis and Economics.

Bioresour Technol 2021 Oct 12:126119. Epub 2021 Oct 12.

School of Chemical Engineering, Jeonbuk National University, 54896, Republic of Korea; School of Semiconductor and Chemical Engineering, Jeonbuk National University, 54896, Republic of Korea. Electronic address:

In this study, techno-economic analysis of the sustainable production of polylactic acid (PLA) and biodiesel from Food Waste (FW), with a plant capacity of 50 tons/day, was investigated. In addition, FW of four countries (China, India, Brazil, and the USA) with different compositions of water, protein, lipid and carbohydrate were proposed. Each country has different PLA production rates based on carbohydrate and biodiesel production based on fat. Read More

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October 2021

Cell disruption and astaxanthin extraction from Haematococcus pluvialis: recent advances.

Bioresour Technol 2021 Oct 12:126124. Epub 2021 Oct 12.

School of Chemical Engineering, and Institute for Environment & Energy, Pusan National University, Busan 46241, Republic of Korea. Electronic address:

The green microalga Haematococcus pluvialis is an excellent source of astaxanthin, a powerful antioxidant widely used in cosmetics, aquaculture, health foods, and pharmaceuticals. This review explores recent developments in cell disruption and astaxanthin extraction techniques applied using H. pluvialis as a model species for large-scale algal biorefinery. Read More

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October 2021

Non-submerged attached growth process for domestic wastewater treatment: Influence of media types and internal recirculation ratios.

Bioresour Technol 2021 Oct 12;343:126125. Epub 2021 Oct 12.

Department of Environmental Engineering and Water Technology, IHE - Delft, Institute of Water Education, 2601 DA, Delft, The Netherlands.

This study is aimed to comprehend the treatment of non-submerged attached growth systems using bio-sponge, bio-cord, and bio-cloth media. Three reactors were set up with internal recirculation ratio of 1 (IR = 1) and similar media surface area. Bio-sponge and bio-cloth reactors showed removal of COD (79 vs. Read More

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October 2021

Influence mechanism of C/N ratio on heterotrophic nitrification- aerobic denitrification process.

Bioresour Technol 2021 Oct 12:126116. Epub 2021 Oct 12.

School of Civil Engineering, Chang'an University, The middle section of the south 2(nd) ring road, 710064, Xi'an, Shaanxi Province, China; Key Laboratory of Water Supply & Sewage Engineering, Ministry of Housing and Urban-rural Development, Chang'an University, The middle section of the south 2(nd) ring road, 710064, Xi'an, Shaanxi Province, China. Electronic address:

A heterotrophic nitrification- aerobic denitrification (HNAD) bacterium, Acinetobacter junii ZHG-1, was isolated, meanwhile, the optimal conditions for the strain were evaluated, moreover, the influence mechanism of the C/N ratio on the HNAD process was investigated from the perspective of electron transport and energy level. The increasing of C/N ratio enhanced the reduced/oxidized nicotinamide adenine dinucleotide (NADH/NAD) ratio, NADH concentration, electron transport system activity (ETSA), ATP content, as well as enzymes activities, consequently, the HNAD performance of the strain can be improved, however, when the C/N ratio was higher than 30, the activities of enzymes relating to the HNAD process and the ETSA had reached the maximum, which might limit the further improvement of the nitrogen removal with the increasing of C/N ratio. As the interaction between different biochemical reactions in HNAD process, more efforts should be devoted to the influent mechanism of different environmental factors on the HNAD process. Read More

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October 2021

Advances in pretreatment of lignocellulosic biomass for bioenergy production: Challenges and perspectives.

Bioresour Technol 2021 Oct 12;343:126123. Epub 2021 Oct 12.

State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address:

As a clean and renewable energy, bioenergy is one of the most promising alternatives to fossil fuels. Lignocellulose possesses great potential for bioenergy production, but the recalcitrant and heterogeneous structure limits its application. Pretreatment technology offers an effective solution to fractionate the main components of the lignocellulose and uncover the available cellulose. Read More

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October 2021

Foraging strategies and physiological status of a marine top predator differ during breeding stages.

Comp Biochem Physiol A Mol Integr Physiol 2021 Oct 12:111094. Epub 2021 Oct 12.

Behavioural Ecology & Ecophysiology Group, Department of Animal Ecology & Systematics, Justus-Liebig University Giessen, D-35392 Giessen, Germany.

Habitat characteristics determine the presence and distribution of trophic resources shaping seabirds' behavioural responses which may result in physiological consequences. Such physiological consequences in relation to foraging strategies of different life-history stages have been little studied in the wild. Thus, we aim to assess differences in oxidative status, condition (fat stores, i. Read More

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October 2021

An integration study of microalgae bioactive retention: From microalgae biomass to microalgae bioactives nanoparticle.

Food Chem Toxicol 2021 Oct 12:112607. Epub 2021 Oct 12.

Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, Semenyih, 43500, Selangor Darul Ehsan, Malaysia. Electronic address:

Microalgae metabolites include biologically active compounds with therapeutic effects such as anticancer, anti-inflammatory and immunomodulation effects. One of the most recent focuses is on utilizing microalgae lipid-based biologically active compounds in food applications. However, most microalgae biological active compounds in their natural forms have common drawbacks like low solubility, low physicochemical stability and strongly susceptibility to degradation, which significantly limits their application in foods, therefore, it is important to find solutions to retain their functional properties. Read More

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October 2021

Krüppel-like factor (KLF)5: An emerging foe of cardiovascular health.

J Mol Cell Cardiol 2021 Oct 12. Epub 2021 Oct 12.

Center for Translational Medicine, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, USA. Electronic address:

Krüppel-like factors (KLFs) are DNA-binding transcriptional factors, which regulate various pathways that pertain to development, metabolism and other cellular mechanisms. KLF5 was first cloned in 1993 and by 1999, it was reported as the intestinal-enriched KLF. Beyond findings that have associated KLF5 with normal development and cancer, it has been associated with various types of cardiovascular (CV) complications and regulation of metabolic pathways in the liver, heart, adipose tissue and skeletal muscle. Read More

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October 2021

Salivary ghrelin response to drinks varying in protein content and quantity and association with energy intake and appetite.

Physiol Behav 2021 Oct 12:113622. Epub 2021 Oct 12.

The Rowett Institute, University of Aberdeen, Foresterhill Road, Aberdeen AB25 2ZD, Scotland, UK.

Salivary hormone analysis is a non-invasive alternative to blood-borne hormone analysis. The orexigenic hormone ghrelin has been detected in human saliva, though the relationship between salivary and blood-borne ghrelin and salivary ghrelin's association with energy intake (EI) and appetite remains unclear. The primary aim of this study was to compare salivary and plasma ghrelin responses to dairy breakfast drinks varying in protein content and quantity, and to determine the relationship between salivary ghrelin and EI and appetite. Read More

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October 2021