747 results match your criteria 1500 ppm-


APRRJVITS11 as a potent tool in chromium (VI) removal from effluent wastewater.

Prep Biochem Biotechnol 2021 May 9:1-8. Epub 2021 May 9.

CO2 and Green Technology Centre, VIT, Vellore, India.

Bioremediation is an essential feature of microorganisms concerning contaminations in soil and water. The use of microorganisms has been proved to be an effective treatment of industrially released effluents comprising of heavy metals, such as chromium (VI). In the current study, seasonal variations were observed in the concentrations of chromium(VI) as the samples from selected locations showed an increase in mean concentration during the summer compared to the low mean during winter, suggesting excessive evaporation in the summer leading to the heavy metal accumulation. Read More

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Enhanced biodegradation of light crude oil by immobilized Bacillus licheniformis in fabricated alginate beads through electrospray technique.

Environ Monit Assess 2021 May 6;193(6):328. Epub 2021 May 6.

Faculty of New Technologies Engineering, Zirab Campus, Shahid Beheshti University, Tehran, Iran.

Petroleum contamination of marine environments due to exploitation and accidental spills causes serious harm to ecosystems. Bioremediation with immobilized microorganisms is an environmentally friendly and cost-effective emerging technology for treating oil-polluted environments. In this study, Bacillus licheniformis was entrapped in Ca alginate beads using the electrospray technique for light crude oil biodegradation. Read More

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Magnesium Zirconate Titanate Thin Films Used as an NO Sensing Layer for Gas Sensor Applications Developed Using a Sol-Gel Method.

Sensors (Basel) 2021 Apr 16;21(8). Epub 2021 Apr 16.

Institute of Microelectronics, Department of Electrical Engineering, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan.

Magnesium zirconate titanate (MZT) thin films, used as a sensing layer on Al interdigitated electrodes prepared using a sol-gel spin-coating method, are demonstrated in this study. The p-type MZT/Al/SiO/Si structure for sensing NO is also discussed. The results indicated that the best sensitivity of the gas sensor occurred when it was operating at a temperature ranging from 100 to 150 °C. Read More

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[Total and soluble fluoride concentration in children´s toothpastes in Spain.]

Rev Esp Salud Publica 2021 Apr 8;95. Epub 2021 Apr 8.

Unidad Docente de Odontología Integrada Infantil. Departamento de Dermatología, Estomatología y Radiología y Medicina Física. Facultad de Medicina-Odontología. Universidad de Murcia. Murcia. España.

Objective: The use of fluoridated toothpastes is considered the most rational method in dental caries control, and it is recommended for all ages people, but for this they must be established at a minimum concentration of 1,000 ppm of total soluble fluoride, in pediatric patients. The objective of the study was to determine the concentration of total and soluble fluoride present in toothpastes marketed in Spain for pediatric use.

Methods: A descriptive and cross-sectional study was carried out throughout 2019, analyzing 11 toothpastes for pediatric use marketed in Murcia, Spain. Read More

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New EAF Slag Characterization Methodology for Strategic Metal Recovery.

Materials (Basel) 2021 Mar 19;14(6). Epub 2021 Mar 19.

GeoRessources, Université de Lorraine, CNRS, F-54000 Nancy, France.

The grown demand of current and future development of new technologies for high added value and strategic metals, such as molybdenum, vanadium, and chromium, and facing to the depletion of basic primary resources of these metals, the metal extraction and recovery from industrial by-products and wastes is a promising choice. Slag from the steelmaking sector contains a significant amount of metals; therefore, it must be considered to be an abundant secondary resource for several strategic materials, especially chromium. In this work, the generated slag from electric arc furnace (EAF) provided by the French steel industry was characterized by using multitude analytical techniques in order to determine the physico-chemical characteristics of the targeted slag. Read More

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Developing a Essential Oil Nanoemulsion for the Eco-Friendly Management of and Larvae and Adults on Stored Wheat.

Molecules 2021 Mar 23;26(6). Epub 2021 Mar 23.

Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, 56124 Pisa, Italy.

Most insecticides commonly used in storage facilities are synthetic, an issue that generates concerns about food safety and public health. Therefore, the development of eco-friendly pest management tools is urgently needed. In the present study, a 6% () essential oil-based nanoemulsion (HvNE) was developed and evaluated for managing , , and , as an eco-friendly wheat protectant. Read More

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Neuroprotective effects of vitamin C and garlic on glycoconjugates changes of cerebellar cortex in lead-exposed rat offspring.

J Chem Neuroanat 2021 Mar 27;114:101948. Epub 2021 Mar 27.

Department of Anatomy and Cell Biology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran; Applied Biomedical Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. Electronic address:

The deteriorating effects of Lead (Pb) on central nervous system (CNS) such as cerebellum has been demonstrated in previous studies. Glycoconjugates with the important role in CNS development may be affected by Pb-exposure. Utilization of antioxidant agents and herbal plants has attracted a great deal of attention on attenuating neurotoxicants-induced damage. Read More

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A catalyst powder-based spraying approach for rapid and efficient removal of fire-generated CO:From laboratory to pilot scale.

J Hazard Mater 2021 Mar 8;415:125607. Epub 2021 Mar 8.

Jiangsu Key Laboratory of Fire Safety in Urban Underground Space, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology, Jiangsu 221116, China; Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, Ministry of Education, Xuzhou, Jiangsu 221116, China. Electronic address:

In confined space fires, the large amount of CO generated by incomplete combustion of carbon-based materials poses a serious threat to the trapped people. However, the efficient method of removing CO in such disasters remains a great challenge. Herein, a spraying catalyst powder (SCP) approach is proposed for CO removal by oxidizing CO to harmless CO. Read More

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Effect of Chitosan Coating Incorporated with Essential Oil on Fresh Chicken Meat during Refrigerated Storage.

Polymers (Basel) 2021 Feb 26;13(5). Epub 2021 Feb 26.

Centro Tecnológico de la Carne de Galicia, Parque Tecnológico de Galicia, rúa Galicia n° 4, San Cibrao das Viñas, 32900 Ourense, Spain.

The present study was conducted to assess the impact of chitosan coating (1%) containing essential oil (500, 1000, and 1500 ppm) as antioxidant and antimicrobial agent on the quality properties and shelf life of chicken fillets during refrigerated storage. After packaging meat samples, physicochemical, microbiological, and organoleptic attributes were evaluated at 0, 3, 6, 9, and 12 days at 4 °C. The results revealed that applied chitosan (CH) coating in combination with essential oils (AFEOs) had no significant ( < 0. Read More

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February 2021

Shock wave and modelling study of the dissociation kinetics of CFI.

Phys Chem Chem Phys 2021 Feb;23(7):4394-4403

Institut für Physikalische Chemie, Universität Göttingen, Tammannstr. 6, D-37077 Göttingen, Germany and Max-Planck-Institut für biophysikalische Chemie, Am Fassberg 11, D-37077 Göttingen, Germany.

The thermal dissociation of C2F5I was studied in shock waves monitoring UV absorption signals from the reactant C2F5I and later formed reaction products such as CF, CF2, and C2F4. Temperatures of 950-1500 K, bath gas concentrations of [Ar] = 3 × 10-5-2 × 10-4 mol cm-3, and reactant concentrations of 100-500 ppm C2F5I in Ar were employed. Absorption-time profiles were recorded at selected wavelengths in the range 200-280 nm. Read More

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February 2021

The Adverse Associations of Classrooms' Indoor Air Quality and Thermal Comfort Conditions on Students' Illness Related Absenteeism between Heating and Non-Heating Seasons-A Pilot Study.

Int J Environ Res Public Health 2021 02 5;18(4). Epub 2021 Feb 5.

Scott-Campus/Durham School of Architectural Engineering and Construction/College of Engineering, University of Nebraska-Lincoln, Lincoln, NE 68128, USA.

(1) The association of the indoor environmental conditions in classrooms with illness-related absenteeism (IRA) was not well investigated. In addition, studying the association between heating and non-heating seasons were very limited; (2) To fill this knowledge gap, a research team collected various indoor air quality (IAQ) and thermal comfort conditions (TC) of 85 elementary classrooms in two school districts from the Midwestern United States throughout an academic year; in total, 255 classroom visits were performed. A negative binomial regression model was implied to associate the classroom's IAQ and TC with IRA, separating for heating and non-heating seasons; (3) During non-heating season, a 3% increase of IRA was estimated with 1,000,000-counts/L increase of particles that had a diameter less than 2. Read More

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February 2021

Response of broiler chickens fed diets supplemented with a bioactive olive pomace extract from Olea europaea to an experimental coccidial vaccine challenge.

Poult Sci 2021 Feb 26;100(2):575-584. Epub 2020 Nov 26.

Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA.

This study aimed to investigate an experimental procedure of coccidial challenge in battery cages and the anticoccidial effect of a bioactive olive pomace extract from Olea europaea (OE) in broiler chickens. To this end, four hundred 1-day-old male chicks were randomly assigned to 5 experimental treatments (10 cages/treatment; 8 birds/cage). One group was fed the control diet without any additives and not challenged (NCU). Read More

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February 2021

A De Novo Transcriptomics Approach Reveals Genes Involved in Thrips Tabaci Resistance to Spinosad.

Insects 2021 Jan 13;12(1). Epub 2021 Jan 13.

Department of Entomology, Volcani Center, Rishon LeZion 7505101, Israel.

The onion thrip, (Thysanoptera: Thripidae) is a major polyphagous pest that attacks a wide range of economically important crops, especially Allium species. The thrip's damage can result in yield loss of up to 60% in onions (). In the past few decades, thrip resistance to insecticides with various modes of actions have been documented. Read More

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January 2021

Bactericides Based on Copper Nanoparticles Restrain Growth of Important Plant Pathogens.

Pathogens 2020 Dec 5;9(12). Epub 2020 Dec 5.

Institute of Molecular Biology and Biotechnology, FORTH, 71110 Voutes Heraklion, Greece.

Copper nanoparticles (CuNPs) can offer an alternative to conventional copper bactericides and possibly slow down the development of bacterial resistance. This will consequently lower the accumulation rate of copper to soil and water and lower the environmental and health burden imposed by copper application. Physical and chemical methods have been reported to synthesize CuNPs but their use as bactericides in plants has been understudied. Read More

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December 2020

Explaining the dependence of M-site diffusion in forsterite on silica activity: a density functional theory approach.

Phys Chem Miner 2020 24;47(12):55. Epub 2020 Nov 24.

School of Earth and Environment, University of Leeds, Leeds, LS2 9JT UK.

Experimentally, silica activity (aSiO) has been shown to have an effect on Mg diffusion in forsterite, but no fully satisfactory mechanism has yet been proposed. We calculated the effects of aSiO and aluminium content (the main contaminant in some recent experimental studies), and their co-effect, on Mg diffusion in forsterite, using thermodynamic minimisations of defect formation energies [calculated using density functional theory (DFT)] and a Monte-Carlo diffusion model. These two variables, in isolation, do not appreciably change the defect concentrations of forsterite and thus do not affect the diffusivity of Mg. Read More

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November 2020

Chronic developmental lead exposure increases μ-opiate receptor levels in the adolescent rat brain.

Neurotoxicology 2021 01 25;82:119-129. Epub 2020 Nov 25.

Brain, Behavior & the Environment Program, Robert Stempel College of Public Health & Social Work, Florida International University, Miami, FL 33199, United States; Department of Environmental Health Sciences, Robert Stempel College of Public Health & Social Work, Florida International University, Miami, FL 33199, United States. Electronic address:

Childhood lead (Pb) intoxication is a global public health problem best known for producing deficits in learning and poor school performance. Human and preclinical studies have suggested an association between childhood Pb intoxication and proclivity to substance abuse and delinquent behavior. While environmental factors have been implicated in opioid addiction, less is known about the role of exposure to environmental pollutants on the brain opioid system. Read More

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January 2021

Synthesis, Characterization, and Assessment of a CeO@Nanoclay Nanocomposite for Enhanced Oil Recovery.

Nanomaterials (Basel) 2020 Nov 17;10(11). Epub 2020 Nov 17.

School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup 6027, Australia.

In this paper, synthesis and characterization of a novel CeO/nanoclay nanocomposite (NC) and its effects on IFT reduction and wettability alteration is reported in the literature for the first time. The NC was characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), energy-dispersive X-ray spectroscopy (EDS), and EDS MAP. The surface morphology, crystalline phases, and functional groups of the novel NC were investigated. Read More

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November 2020

Assessment of the Synergic Effect between S-Layer Protein and Glyphosate in the Lethality of the Invasive Arboviral Vector .

Insects 2020 Nov 12;11(11). Epub 2020 Nov 12.

Microbiological Research Center (CIMIC), Department of Biological Sciences, Universidad de Los Andes, Bogotá 111711, Colombia.

Glyphosate and glyphosate-based herbicides are among the most used chemicals in plant pest control. Both glyphosate and its main by-product Aminomethylphosphonic Acid (AMPA) are highly environmentally persistent and, through several processes (including surface runoff and bioaccumulation), affect species beyond their intended targets, especially in aquatic ecosystems. is a novel invasive arboviral vector in Colombia and has spread to much of the national territory in recent years. Read More

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November 2020

Adsorptive seawater desalination using MOF-incorporated Cu-alginate/PVA beads: Ion removal efficiency and durability.

Chemosphere 2021 Apr 2;268:128797. Epub 2020 Nov 2.

Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk, South Korea. Electronic address:

With the worsening water scarcity problem, seawater desalination has been receiving gradually increasing attention. Ion adsorptive desalination was introduced as one of the seawater desalination techniques. In our previous study, metal-organic framework (MOF)-incorporated single-network alginate (MOF-Alg(Cu)) beads were used to adsorb ions in seawater. Read More

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The potential use of Azolla pinnata as an alternative bio-insecticide.

Sci Rep 2020 11 6;10(1):19245. Epub 2020 Nov 6.

Faculty of Earth Science, Universiti Malaysia Kelantan, Jeli Campus, 17600, Jeli, Kelantan, Malaysia.

Four different tests showed the effectiveness of Azolla pinnata plant extracts against Aedes aegypti and Aedes albopictus mosquitoes. In the adulticidal test, there was a significant increase in mortality as test concentration increases and A. pinnata extracts showed LC and LC values of 2572. Read More

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November 2020

Response to stress and allergen production caused by metal ions (Ni, Cu and Zn) in oregano (Origanum vulgare L.) plants.

J Biotechnol 2020 Dec 23;324:171-182. Epub 2020 Oct 23.

Institute of Natural Products and Cosmetics, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Poland. Electronic address:

Heavy metals are the cause of one of the most significant biosphere contamination problems worldwide, as they can be highly reactive and toxic according to their oxidation levels. Their toxic effects are correlated with the elevated production of reactive oxygen species (ROS) and oxidative cellular damage occurring in plants. The aim of the present study was the investigation of the effects of three heavy metals (Ni, Cu, Zn) applied to the soil in biochemical defense-related responses and allergen production in the aromatic plant oregano (Origanum vulgare L. Read More

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December 2020

Metal-Organic Framework-Surface-Enhanced Infrared Absorption Platform Enables Simultaneous On-Chip Sensing of Greenhouse Gases.

Adv Sci (Weinh) 2020 Oct 18;7(20):2001173. Epub 2020 Sep 18.

Key Laboratory of Optoelectronic Technology & Systems Ministry of Education, and International R & D Center of Micro-Nano Systems and New Materials Technology Chongqing University Chongqing 400044 P. R. China.

Simultaneous on-chip sensing of multiple greenhouse gases in a complex gas environment is highly desirable in industry, agriculture, and meteorology, but remains challenging due to their ultralow concentrations and mutual interference. Porous microstructure and extremely high surface areas in metal-organic frameworks (MOFs) provide both excellent adsorption selectivity and high gases affinity for multigas sensing. Herein, it is described that integrating MOFs into a multiresonant surface-enhanced infrared absorption (SEIRA) platform can overcome the shortcomings of poor selectivity in multigas sensing and enable simultaneous on-chip sensing of greenhouse gases with ultralow concentrations. Read More

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October 2020

Effect of Water Concentration in LiPF-Based Electrolytes on the Formation, Evolution, and Properties of the Solid Electrolyte Interphase on Si Anodes.

ACS Appl Mater Interfaces 2020 Nov 23;12(44):49563-49573. Epub 2020 Oct 23.

Materials and Chemical Science and Technology Directorate, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United States.

A trace amount of water in an electrolyte is one of the factors detrimental to the electrochemical performance of silicon (Si)-based lithium-ion batteries that adversely affect the formation and evolution of the solid electrolyte interphase (SEI) on Si-based anodes and change its properties. Thus far, a lack of fundamental and mechanistic understanding of SEI formation, evolution, and properties in the presence of water has inhibited efforts to stabilize the SEI for improved electrochemical performance. Thus, we investigated the SEI formed in a Gen2 electrolyte (1. Read More

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November 2020

Changes in the morphological traits and the essential oil content of sweet basil ( L.) as induced by cadmium and lead treatments.

Authors:
Naglaa A Youssef

Int J Phytoremediation 2021 30;23(3):291-299. Epub 2020 Sep 30.

Faculty of Science, Botany & Microbiology Department, Sohag University, Sohag, Egypt.

The purpose of this study was to inspect the suitability of sweet basil ( L.) for phytoremediation of heavy metal contaminated areas in urban areas of Egypt through study the impact of the most common pollutants in Egypt: cadmium (Cd) and lead (Pb) on morphological traits, and essential oil (EOs) content of sweet basil. The experiment was done under greenhouse conditions. Read More

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February 2021

The effects of carbon dioxide exposure concentrations on human vigilance and sentiment in an enclosed workplace environment.

Indoor Air 2021 Mar 7;31(2):467-479. Epub 2020 Oct 7.

School of Aeronautic Science and Engineering, Beihang University, Beijing, China.

In this study, fifteen participants were exposed to different carbon dioxide (CO ) concentrations in an enclosed environmental chamber to investigate the potential effects of elevated CO concentrations on human vigilance and sentiment. The psychomotor vigilance test (PVT), the Karolinska Sleepiness Scale (KSS), and the Positive and Negative Affect Schedule (PANAS) were measured before and after each 4-hour CO exposure session. The statistical analyses of the PVT performance metrics showed that the human vigilance decreased significantly with the elevated CO concentration from 1500 ppm to above 3500 ppm, but no significant change was observed in the KSS score. Read More

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Combined Toxicity of Cannabidiol Oil with Three Bio-Pesticides against Adults of , , and .

Int J Environ Res Public Health 2020 09 13;17(18). Epub 2020 Sep 13.

Department of Pharmacy, University of Patras, 26504 Patras, Greece.

The present study investigates the interaction between cannabidiol (CBD) oil and three biopesticides: Azatin and two baculovirus formulations (Madex and Helicovex), both separately and in combination, in order to investigate their interaction against adults of four major coleopteran stored-product pests: (Coleoptera: Curculionidae), (Coleoptera: Bostrichidae), (Coleoptera: Bostrichidae) and (Coleoptera: Dermestidae). CBD, which has been understudied for its insecticidal properties, was applied at three different doses (500, 1500 and 3000 ppm). The biopesticides were administered at 1500 ppm. Read More

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September 2020

NEOTROPICAL CARNIVORES: a data set on carnivore distribution in the Neotropics.

Ecology 2020 11;101(11):e03128

Independent researcher, Rua Afonso Pena, 226, Lavras, MG, 37200-000, Brazil.

Mammalian carnivores are considered a key group in maintaining ecological health and can indicate potential ecological integrity in landscapes where they occur. Carnivores also hold high conservation value and their habitat requirements can guide management and conservation plans. The order Carnivora has 84 species from 8 families in the Neotropical region: Canidae; Felidae; Mephitidae; Mustelidae; Otariidae; Phocidae; Procyonidae; and Ursidae. Read More

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November 2020

Growth of Listeria monocytogenes in ready-to-eat "shrimp cocktail": Risk assessment and possible preventive interventions.

Int J Food Microbiol 2020 Dec 8;334:108800. Epub 2020 Aug 8.

Department of Health, Animal Science and Food Safety, University of Milan, Via Celoria 10, 20133 Milan, Italy.

The present study investigated the presence, growth potential, and public health risk posed by Listeria monocytogenes in a ready-to-eat "shrimp cocktail". The pathogen was detected in 4 out of the 104 samples, and there were no counts above the enumeration limit (1 Log colony-forming unit (CFU)/g); the product was a suitable substrate for pathogen growth owing to its chemical/physical properties. A stochastic quantitative microbial risk assessment (QMRA) was performed to estimate the expected number of invasive listeriosis cases caused by the consumption of 10,000 servings of the product on the last day of its shelf life, considering a population comprising healthy consumers, those susceptible, and transplant recipients. Read More

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December 2020

High Sensitivity Microfiber Interferometer Sensor in Aqueous Solution.

Sensors (Basel) 2020 Aug 21;20(17). Epub 2020 Aug 21.

Wireless and Photonics Networks Research Centre, University Putra Malaysia, Serdang 43400, Selangor, Malaysia.

The need for environmental protection and water pollution control has led to the development of different sensors for determining many kinds of pollutants in water. Ammonia nitrogen presence is an important indicator of water quality in environmental monitoring applications. In this paper, a high sensitivity sensor for monitoring ammonia nitrogen concentration in water using a tapered microfiber interferometer (MFI) as a sensor platform and a broad supercontinuum laser as the light source is realized. Read More

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Indoor air quality at school and students' performance: Recommendations of the UNESCO Chair on Health Education and Sustainable Development & the Italian Society of Environmental Medicine (SIMA).

Health Promot Perspect 2020 12;10(3):169-174. Epub 2020 Jul 12.

UNESCO Chair on Health Education and Sustainable Development, Naples, Italy.

The issue of indoor air quality (IAQ) concerns 64 million students across Europe, but it is still a neglected topic, although it impacts both their health and learning outcomes. Classroommicroclimate is the first key factor determining a healthy or unhealthy school environment, and it is influenced by ventilation, temperature and humidity rate. Classrooms are usually crowded, overheated and poorly ventilated, thus resulting in possible increases of carbon dioxide (CO), that can cause several problems when its concentrations exceed the value of 0. Read More

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