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PubMed Journals Articles About "Argon Plasma Effects Maize Pesticides Degradation Quality Changes" RSS

04:19 EDT 25th June 2019 | BioPortfolio

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Showing "Argon plasma effects maize pesticides degradation quality changes" PubMed Articles 1–25 of 38,000+

Argon plasma effects on maize: pesticides degradation and quality changes.

Maize is used excessive pesticides during planting, storage and transportation to ensure its production, resulting in pesticides residues on maize that threaten human health. Plasma, compared with other technologies, has been widely regarded as a green, safety and promising technology for surface decontamination to ensure maize safety and quality.


Non-thermal plasma needle as an effective tool in dimethoate removal from water.

Intensive use of pesticides requires innovative approaches for their removal from the environment. Here we report the method for degradation of dimethoate in water using non-thermal plasma needle and analyze kinetics of dimethoate removal and possible degradation pathways. The effects of dimethoate initial concentration, plasma treatment time, Argon flow rate and the presence of radical promoters on the effectiveness of proposed method are evaluated. With argon flow rate of 0.5 slm (standard litres per minu...

Emittance Preservation in an Aberration-Free Active Plasma Lens.

Active plasma lensing is a compact technology for strong focusing of charged particle beams, which has gained considerable interest for use in novel accelerator schemes. While providing kT/m focusing gradients, active plasma lenses can have aberrations caused by a radially nonuniform plasma temperature profile, leading to degradation of the beam quality. We present the first direct measurement of this aberration, consistent with theory, and show that it can be fully suppressed by changing from a light gas s...


Comparative Thermal Effects of J-Plasma®, Monopolar, Argon, and Laser Electrosurgery in a Porcine Tissue Model.

The objective of this study was to understand how J-Plasma® (Bovie Medical Corporation, Clearwater, Florida) surgical energy compares to monopolar, argon beam, and CO2 laser devices in terms of depth of penetration and lateral thermal spread in a porcine tissue model.

Measurement of OH radicals distribution in a microwave plasma sheet using LIF method.

Microwave plasma sources (MPSs) operating at atmospheric pressure provide plasmas in the form of a flame or cylindrical column. In contrast, this article presents an innovative MPS (patented by us) for generating a new type of plasma, i.e. in the form of a plasma sheet, which is generated in a flat cuboidal quartz box. It is based on a WR 340 waveguide, powered by microwaves of 2.45 GHz and operated in argon at atmospheric pressure. The plasma sheet contains a multitude of filaments typical of microwave a...

Degradation of six typical pesticides in water by VUV/UV/chlorine process: Evaluation of the synergistic effect.

Vacuum ultraviolet/ultraviolet/chlorine (VUV/UV/chlorine) is considered a novel advanced oxidation process (AOP), but little is known about its kinetics for pollutant degradation in water treatment. This study investigated the degradation of six typical pesticides, namely dimethoate (DMT), atrazine (ATZ), prometon (PMT), propoxur (PPX), bromacil (BRM) and propachlor (PPC), by VUV/UV/chlorine. The results show that all pesticides were rapidly degraded by VUV/UV/chlorine with a high removal efficiency of over...

An endoscopic training and assessment model for argon plasma coagulation.

Argon plasma coagulation (APC) is a standard modality for the treatment of gastrointestinal bleeding. However, there are no metrics to assess technical proficiency. We aimed to determine if a Quick APC Training Test (QAPCTT) can improve performance and assess proficiency with this modality.

Roles of maize cytochrome P450 (CYP) enzymes in stereo-selective metabolism of hexabromocyclododecanes (HBCDs) as evidenced by in vitro degradation, biological response and in silico studies.

In vitro biotransformation of HBCDs by maize cytochrome P450 (CYP) enzymes, responses of CYPs to HBCDs at protein and transcription levels, and in silico simulation of interactions between CYPs and HBCDs were investigated in order to elucidate the roles of CYPs in the metabolism of HBCDs in maize. The results showed that degradation reactions of HBCDs by maize microsomal CYPs followed the first-order kinetics and were stereo-selective, with the metabolic rates following the order (-)γ- > (+)γ- > (...

Numerical optimization of temperature-time degradation of multiple mycotoxins.

Mycotoxins are potent food contaminants that exert significant deleterious effects on human and animal health, yet, there is limited and often conflicting data on their thermal stability. The present study systematically investigated the thermal degradation patterns of multiple mycotoxins as a function of temperature and time, in pure form and spiked into a food matrix (maize flour), using a numerical modelling approach. Mycotoxins under investigation included aflatoxins (AFs), fumonisins (FBs), zearalenone...

Effect of Argon Plasma Surface Treatment on Bond Strength of Resin Composite Repair.

This study evaluated the effect of argon plasma treatment (PLA) and its combination with sandblasting (SAN), silanization (SIL), and hydrophobic bonding resin (HBR) application on the micro-shear bond strength of water-aged restorative resin composite to a newly placed composite, simulating restoration repair.

Effects and efficacy of different sterilization and disinfection methods on electrospun drug delivery systems.

Microbiological quality of a pharmaceutical product is an essential requirement ensuring patient safety, thus effective sterilization/disinfection methods need to be found. The aim of this study was to evaluate the efficacy of different sterilization/disinfection methods on drug-loaded electrospun matrices and the impact of these treatments on the functionality related characteristics of these matrices. The sterilization efficacy of gamma-irradiation, ultraviolet-irradiation, in situ generated chlorine gas ...

Influence of pesticide concentration on their heterogeneous atmospheric degradation by ozone.

A fraction of the atmospheric pesticides can be adsorbed on particles surface according to their physicochemical properties. After adsorption, pesticides can undergo heterogeneous reactivity with atmospheric oxidants such as ozone, but the influence of the pesticide surface coating (i.e., the percentage of the particle surface covered by pesticide molecules) on the degradation kinetics is not well-understood. To estimate the importance of this phenomenon, the influence of the surface coating level in pestic...

Interactive effects of salinity and nitrogen forms on plant growth, photosynthesis and osmotic adjustment in maize.

To enhance crop productivity and minimize the harmful effects of various environmental stresses, such as salinity and drought, farmers often use mineral fertilizers. However, inadequate or excessive fertilization can reduce plant growth and nutritive quality and contribute to soil degradation and environmental pollution. This study investigated the effects of salinity (0, 100 or 150 mM NaCl) and nitrogen form (sole NO or NH, or combined NO:NH at 25:75 or 50:50) on growth, photosynthesis, and water and ion...

Argon plasma coagulation is an effective treatment for chronic radiation proctitis in gynaecological malignancy: An observational study.

Chronic radiation proctitis (CRP) develops in 5-15% of patients after pelvic radiatiotherapy with rectal bleeding as the main symptom. Reports suggest that Argon Plasma Coagulation (APC) can be an effective therapy for CRP following radiotherapy for prostate cancer but there is less information as to how useful it is after radiotherapy for gynaecological malignancy..

Residues of pesticides and some metabolites in dissolved and particulate phase in surface stream water of Cachapoal River basin, central Chile.

In the last twenty years, pesticide use in Chile has increased more than 160%, generating a greater risk of water resources pollution. The objective of this study was to assess the presence of 22 pesticides and 12 degradation products in surface water samples from the Cachapoal River basin, Central Chile, an area characterized by intense agricultural activity. Pesticide concentrations in the dissolved phase (DP) and particulate phase (PP) in samples collected in the dry season and after precipitation events...

Transcriptomic analysis of the maize (Zea mays L.) inbred line B73 response to heat stress at the seedling stage.

High temperature is a common stress, which influences the growth and reproduction of plants. Maize is one of the most important crops all over the world. However, heat stress reduces significantly the yield and quality of maize. Therefore, it is important to illuminate molecular mechanism of maize response to heat stress. To estimate genes related to heat stress, we analyzed the transcriptome of maize in response to heat stress. In this study, six cDNA libraries were constructed form total RNA isolated from...

Effect of Non-Thermal Plasma on Proliferative Activity and Adhesion of Multipotent Stromal Cells to Scaffolds Developed for Tissue-Engineered Constructs.

We studied the effect of non-thermal argon plasma on proliferative activity of bone marrow multipotent stromal cells in vitro. Treatment of stromal cell suspension with pure argon did not affect their proliferation. The cells treated with non-thermal argon plasma and explanted in the treatment medium demonstrated growth inhibition by 30-40% in comparison with the control. Multipotent stromal cells treated with plasma and after centrifugation explanted in normal medium within 12 min demonstrated accelerated ...

Photoelectrocatalyzed degradation of a pesticides mixture solution (chlorfenvinphos and bromacil) by WO nanosheets.

A photoelectrocatalyst consisting of WO nanosheets or nanorods has been synthesized by electrochemical anodization under hydrodynamic conditions, and has been used for the degradation of two toxic pesticides: chlorfenvinphos and bromacil. Nanostructures have been characterized by FESEM and Raman spectroscopy. Photoelectrochemical degradation tests have been carried out both for individual pesticide solutions and for a mixture solution, and the concentration evolution with time has been followed by UV-Vis sp...

Degradation of some organophosphorus pesticides in aqueous solution by gamma irradiation.

This study reviews the effect of different gamma radiation doses (1, 3, 5, 10 and 20 kGy) on the degradation of chlorfenvinphos, diazinon, dimethoate, and profenofos at different concentrations (0.5, 1.0, and 5 μg/mL) in aqueous solutions (deionized, tap, and groundwater). The role of initial concentration, measured total dissolved solids and pH on degradation was investigated. The degradation of the four tested organophosphates due to gamma irradiation was determined using LC-MS/MS. The radiolytic degra...

Does dual reduction in chemical fertilizer and pesticides improve nutrient loss and tea yield and quality? A pilot study in a green tea garden in Shaoxing, Zhejiang Province, China.

Tea tree (Camellia sinensis) is a valuable and popular cash crop widely planted in tropical and subtropical areas of China. To increase tea yield and quality, high rates of chemical fertilizer and pesticide application have generally been used; however, increasing usage of fertilizers and pesticides does not always proportionally increase tea yield. Indeed, excessive nutrient inputs may cause serious agricultural non-point source pollution. A pilot study on dual reduction in fertilizers and pesticides was c...

Removal of nine pesticide residues from water and soil by biosorption coupled with degradation on biosorbent immobilized laccase.

Biosorbents prepared with peanut shell and wheat straw were act as supports for the immobilization of Aspergillus laccase, and the redox mediator syringaldehyde (SA) was used to improve laccase-catalyzed degradation of nine pesticide residues, including isoproturon, atrazine, prometryn, mefenacet, penoxsulam, nitenpyram, prochloraz, pyrazosulfuron-ethyl and bensulfuron-methyl. Pesticides in water and soil samples were effectively removed via biosorbent concentration and subsequent immobilized laccase degrad...

Investigation and development of maize fused network analysis with multi-omics.

Maize is a critically important staple crop in the whole world, which has contributed to both economic security and food in planting areas. The main target for researchers and breeding is the improvement of maize quality and yield. The use of computational biology methods combined with multi-omics for selecting biomolecules of interest for maize breeding has been receiving more attention. Moreover, the rapid growth of high-throughput sequencing data provides the opportunity to explore biomolecules of intere...

Effect of persimmon tannin on the physicochemical properties of maize starch with different amylose/amylopectin ratios.

The effects of persimmon tannin (PT) on the physicochemical properties of maize starch with different amylose/amylopectin ratios were studied. The results showed that PT remarkably altered the physicochemical properties of the starch. And the effects were dependent both on the concentration of PT and the amylose/amylopectin ratios. DSC analysis showed that PT slightly increased the gelatinization temperature of low-amylose (LAC) and intermediate-amylose maize starch (IAC), whereas the Tc and Tp of high-amyl...

Difenoconazole and linuron dissipation kinetics in carrots under open-field conditions.

The dissipation of difenoconazole and linuron using an open-field experimental approach with carrots exposed to one-, two- and fivefold the recommended dose of the pesticides was evaluated to provide safe recommendation to ensure food safety of carrots. The pesticide residue analysis was performed with solid-liquid extraction with low temperature partitioning technique (SLE/LTP) followed by gas chromatography analysis. The recovery percentages of extracts obtained from samples of carrot passed through SLE/L...

Synergetic effect of combined ensiling of freshly harvested and excessively wilted maize stover for efficient biogas production.

This study investigated the synergetic effects of ensiling freshly harvested maize stover (FHM) and excessively wilted maize stover (EWM) on biogas production. FHM and EWM were mixed in various proportions to obtain dry matter (DM) contents of 30%, 35% and 40%. For reference, FHM alone was ensiled and stored in open-air. Successful storage performance was obtained by the ensiling treatments, and the organic matter loss of 1.1-2.2% was far lower than in open-air storage (63.1%). An initial water-soluble carb...


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