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Biological silicon nanoparticles improve Phaseolus vulgaris L. yield and minimize its contaminant contents on a heavy metals-contaminated saline soil

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Journal of Environmental sciences 2021年第8期33卷 1-14页

作者： Mohamed T.El-saadony El-sayed M.Desoky ahmed M.saad Rania s.M.Eid Eman selem ahmed s.elrys Department of Agricultural Microbiology Faculty of AgricultureZagazig UniversityZagazig 44511Egypt Botany Department Faculty of AgricultureZagazig UniversityZagazig 44511Egypt Biochemistry Department Faculty of AgricultureZagazig UniversityZagazig 44511Egypt Agricultural Botany Department Faculty of AgricultureBenha University13736Egypt Botany and Microbiology Department Faculty of ScienceZagazig University44511Egypt soil science Department Faculty of AgricultureZagazig University44511ZagazigEgypt

The synthesis of biological silicon nano-particles(Bio-si-NPs)is an eco-friendly and lowcost *** is no study focusing on the effect of Bio-si-NPs on the plants grown on saline soil contaminated with heavy *** this study,an attempt was made to synthesis Bio-si-NPs using potassium silica florid substrate,and the identified Aspergillus tubingensis AM11 isolate that separated from distribution systems of the potable water.A twoyear field trial was conducted to compare the protective effects of Bio-si-NPs(2.5 and 5.0 mmol/L)and potassium silicate(10 mmol/L)as a foliar spray on the antioxidant defense system,physio-biochemical components,and the contaminants contents of Phaseolus vulgaris *** on saline soil contaminated with heavy *** findings showed that all treatments of Bio-si-NPs and potassium silicate significantly improved plant growth and production,chlorophylls,carotenoids,transpiration rate,net photosynthetic rate,stomatal conductance,membrane stability index,relative water content,free proline,total soluble sugars,N,P,K,Ca2+,K+/Na+,and the activities of peroxidase,catalase,ascorbic peroxidase and superoxide oxide *** of Bio-si-NPs and potassium silicate significantly decreased electrolyte leakage,malondialdehyde,H2 O2,O2·-,Na+,Pb,Cd,and Ni in leaves and pods of Phaseolus vulgaris *** to ***-si-NPs were more effective compared to potassium *** of Bio-si-NPs at the rate of 5 mmol/L was the recommended treatment to enhance the performance and reduce heavy metals content on plants grown on contaminated saline soils.

关键词： Bean silicon Nano-silicon Aspergillus tubingensis AM11 salinity Heavy metals

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spirulina platensis extract improves the production and defenses of the common bean grown in a heavy metals-contaminated saline soil

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Journal of Environmental sciences 2023年第7期129卷 240-257页

作者： Mostafa M.Rady ahmed s.elrys Eman selem ahmed A.A.Mohsen safaa M.A.I.Arnaout ahmed H.El-sappah Khaled A.El-Tarabily El-sayed M.Desoky Botany Department Faculty of AgricultureFayoum UniversityFayoum 63514Egypt College of Tropical Crops Hainan UniversityHaikou 570228China soil science Department Faculty of AgricultureZagazig UniversityZagazig 44511Egypt Botany and Microbiology Department Faculty of ScienceZagazig UniversityZagazig 44511Egypt Horticulture Department Faculty of AgricultureZagazig UniversityZagazig 44511Egypt Botany Department Faculty of AgricultureZagazig UniversityZagazig 44511Egypt Genetics Department Faculty of AgricultureZagazig UniversityZagazig 44511Egypt Department of Biology College of ScienceUnited Arab Emirates UniversityAl-Ain 15551United Arab Emirates Khalifa Center for Genetic Engineering and Biotechnology United Arab Emirates UniversityAl-Ain 15551United Arab Emirates Harry Butler Institute Murdoch UniversityMurdoch 6150Australia

Plants have to cope with several abiotic stresses,including salinity and heavymetals(HMs).Under these stresses,several extracts have been used as effective natural biostimulants,however,the use of spirulina platensis(sP)extract(sPE)remains *** effects of sPE were evaluated as soil addition(sA)and/or foliar spraying(Fs)on antioxidant defenses and HMs content of common bean grown in saline soil contaminated with ***(40 or 80 mg sPE/hill added as sA or 20 or 40 mg sPE/plant added as Fs)or integrative(sA+Fs)applications of sPE showed significant improvements in the following order:sA-80+Fs-40>sA-80+Fs-20>sA-40+Fs-40>sA-40+Fs-20>sA-80>sA-40>Fs-40>Fs-20>***,the integrative sA+Fs with 40 mg sP/plant was the most effective treatment in increasing plant growth and production,overcoming stress effects and minimizing contamination of the edible *** significantly increased plant growth(74%–185%)and yield(107%–227%)by enhancing net photosynthetic rate(78.5%),stomatal conductance(104%),transpiration rate(124%),and contents of carotenoids(60.0%),chlorophylls(49%–51%),and NPK(271%–366%).These results were concurrent with the marked reductions in malondialdehyde(61.6%),hydrogen peroxide(42.2%),nickel(91%–94%),lead(80%–9%),and cadmium(74%–91%)contents due to the improved contents of glutathione(87.1%),ascorbate(37.0%),andα-tocopherol(77.2%),and the activities of catalase(18.1%),ascorbate peroxidase(18.3%),superoxide dismutase(192%),and glutathione reductase(52.2%)as reinforcing ***,this most effective treatment is recommended to mitigate the stress effects of salinity and HMs on common bean production while minimizing HMs in the edible part.

关键词： Antioxidant defense system Biostimulants Heavy metals Microalgae extracts saline soil soil pollution

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生物炭长期施入对燥红土有机碳及其组分的影响

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农业环境科学学报 2024年第9期43卷 2032-2040页

作者：万云星牟金霞杨婼妍陈云忠王誉琴邵晓辉朱启林伍延正但小倩汤水荣 ahmed s.elrys 孟磊海南大学热带农林学院海口570228 中化现代农业(湖北)有限公司武汉430000 海南大学南繁学院海南三亚572025

为探究生物炭长期施入对土壤有机碳(sOC)及其活性组分的影响,通过室内培养试验,比较短期(1个月)施用生物炭(BF)和生物炭施入3 a(BA)对sOC及其组分的影响。结果表明:生物炭施入显著提高了sOC、颗粒有机碳(POC)、易氧化有机碳(EOC)、轻组... 详细信息

为探究生物炭长期施入对土壤有机碳(sOC)及其活性组分的影响,通过室内培养试验,比较短期(1个月)施用生物炭(BF)和生物炭施入3 a(BA)对sOC及其组分的影响。结果表明:生物炭施入显著提高了sOC、颗粒有机碳(POC)、易氧化有机碳(EOC)、轻组有机碳(LFOC)和微生物生物量碳(MBC)含量。相比不施生物炭处理(CK),施用生物炭处理土壤的POC、EOC、LFOC和MBC分别增加了97.5%~241.5%、21.8%~59.4%、66.8%~202.7%和83.7%~199.9%。相较于BF,BA的sOC、EOC、POC和MBC含量显著降低,但溶解性有机碳(DOC)含量显著升高。相较于CK,施生物炭土壤的碳库管理指数(CPMI)显著提高,培养1个月的1%生物炭(BF1)和2%生物炭(BF2)及培养3 a的1%生物炭(BA1)和2%生物炭(BA2)处理的CPMI值分别提高了48.81%、89.73%、54.66%和157.48%。相关分析显示,MBC、POC、LFOC及EOC含量与sOC含量显著正相关。综上所述,施用生物炭能实现土壤固碳,但随着施用年限延长,CPMI显著降低,从而降低了sOC的稳定性。

关键词：生物炭土壤有机碳活性碳组分土壤碳库

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黄腐酸与甘草提取物和硫辛酸配合应用提高盐胁迫下小麦产量和抗逆性

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腐植酸 2020年第4期 59-59页

作者： ahmed s.elrys ahmed I.E. Abdo Enas M.W. Abdel-Hamed 李双中国腐植酸工业协会

虽然不同的植物提取物和植物生长调节剂被用来维持盐胁迫条件下植物生长,但是没有关于黄腐酸(FA)和甘草提取物(LRE)或硫辛酸(LA)作为天然生物刺激剂的应用研究。为此,本研究通过2组盆栽试验,分别研究了叶面喷施FA(0.2 mg/kg土壤)+LRE(5 ...

虽然不同的植物提取物和植物生长调节剂被用来维持盐胁迫条件下植物生长,但是没有关于黄腐酸(FA)和甘草提取物(LRE)或硫辛酸(LA)作为天然生物刺激剂的应用研究。为此,本研究通过2组盆栽试验,分别研究了叶面喷施FA(0.2 mg/kg土壤)+LRE(5 g/L)、FA(0.2 mg/kg土壤)+LA(0.1mmol/L)配合施用对小麦渗透调节物质、抗氧化剂、生长特性、光合色素、养分吸收和产量的影响,以及3种浓度盐水(0.70ds/m、

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Vascular endothelial growth factor:a double-edged sword in the development of white matter lesions

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Neural Regeneration Research 2025年第1期20卷 191-192页

作者： Narek Manukjan Daniel Fulton Zubair ahmed WMatthijs Blankesteijn sébastien Foulquier Department of Pharmacology and Toxicology Maastricht UniversityMaastrichtThe Netherlands CARIM-school for Cardiovascular Diseases Maastricht UniversityMaastrichtThe Netherlands Neuroscience and Ophthalmology Institute of Inflammation and AgeingUniversity of BirminghamEdgbastonBirminghamUK Centre for Trauma sciences Research University of BirminghamEdgbastonBirminghamUK MHeNs-school for Mental Health and Neuroscience Maastricht UniversityMaastrichtThe Netherlands Department of Neurology Maastricht University Medical CenterMaastrichtThe Netherlands

As the population ages,the burden of age-related diseases becomes ***,over 55 million people suffer from dementia worldwide,with Alzheimer’s disease being the most common ***,it is becoming clearer that underlying vascular pathology such as cerebral small vessel disease(csVD)may be a more detrimental cause for dementia(Cuadrado-Godia et al.,2018).It is estimated that 10%-30%of the elderly population and 35%-90%of all dementia patients exhibit signs of *** term csVD refers to pathology affecting the small vessels of the brain,which can lead to lacunar cerebral infarcts,enlarged perivascular spaces,and cortical hemorrhages(Cuadrado-Godia et al.,2018).CsVD is often associated with cognitive decline,gait problems,and dementia(Cuadrado-Godia et al.,2018).

关键词： pathology becoming white

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Nanosecond pulse and dual-wavelength Q-switched 1.5 μm fiber laser using MAX phase Cr2TiAlC2 saturable absorber

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Optoelectronics Letters 2025年第1期21卷 7-12页

作者： ahmed shakir AL-HITI Hiba HAssAN Department of Electrical Engineering Faculty of Engineering University of Anbar Department of Laser and Optoelectronics Engineering University of Technology-Iraq

We demonstrated a new type of MAX phase material, chromium titanium aluminum carbide（Cr2TiAlC2） polymer film, to generate a passively Q-switched erbium-doped fiber laser（EDFL）. The film thickness was measured to be around 45 μm, which was fabricated using the embedding method with polyvinyl alcohol（PVA） polymer as hoster. The saturable absorber（sA） film demonstrates a dual-wavelength passively Q-switched EDFL which operates at 1 531 nm and 1 560.19 nm, respectively. The Q-switching pulse duration could be varied from 2.46 μs to 770 ns, while the repetition rate varied from 92.76 kHz to 106.6 kHz with an increasing input pumping range from 154 mW to 300 mW. The maximum output power and pulse energy of 15.05 mW and 141.18 nJ were obtained at the maximum input power of 300 mW, respectively.

关键词： saturable absorbers

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Modeling natural convection boundary layer flow of micropolar nanofluid over vertical permeable cone with variable wall temperature

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Applied Mathematics and Mechanics(English Edition) 2017年第8期38卷 1171-1180页

作者： s.E.ahmed Department of Mathematics Faculty of ScienceSouth Valley UniversityQena 83523Egypt

This paper discusses the natural convection boundary layer flow of a micropo- lax nanofluid over a vertical permeable cone with variable wall temperatures. Non-similax solutions are obtained. The nonlineaxly coupled differential equations under the boundary layer approximations governing the flow axe solved numerically using an efficient, itera- tive, tri-diagonal, implicit finite difference method. Different experimental correlations for both nanofluid effective viscosity and nanofluid thermal conductivity are considered. It is found that as the vortex-viscosity parameter increases, both the velocity profiles and the local Nusselt number decrease. Also, among all the nanoparticles considered in this investigation, Cu gives a good convection.

关键词： micropolar nanofluid non-similar solution cone finite difference method,non-uniform heating

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Carbon nanotube-based nanoelectromechanical resonatoras mass biosensor

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Chinese Physics B 2020年第7期29卷 583-587页

作者： ahmed MElseddawy Adel HPhillips ahmed s Bayoumi Faculty of Graduate studies University of WindsorWindsorOntarioCanada Faculty of Engineering Ain-Shams UniversityCairoEgypt Faculty of Engineering Kafr-Elsheikh UnversityKafr-ElsheikhEgypt

The use of single walled carbon nanotube-based nanoelectromechanical system(NEMs)resonator to sense the biomolecules'mass is investigated under the influence of an external ac-field.A single walled carbon nanotube(sWCNT)cantilever has been proposed and studied if the mass is attached at the tip or various intermediate *** shift of the resonant frequency and the quality factor have been investigated and show high sensitivity to the attached mass of biomolecule and its *** proposed sWCNT-based NEMs resonator is a good candidate for sensing and tracing biomolecules'mass as concentration of acetone in human exhale,resulting in a painless,correct,and simple diabetics'diagnosis.

关键词： single walled carbon nanotube nanoelectromechanical system resonator ac-field biomolecule

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Dynamic Interaction Analysis of Coupled Axial-Torsional-Lateral Mechanical Vibrations in Rotary Drilling systems

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structural Durability & Health Monitoring 2025年第1期19卷 77-103页

作者： sabrina Meddah sid ahmed Tadjer Abdelhakim Idir Kong Fah Tee Mohamed Zinelabidine Doghmane Madjid Kidouche Applied Automation Laboratory Faculty of Hydrocarbons and ChemistryUniversity of BoumerdesBoumerdes35000Algeria Institute of Electrical and Electronic Engineering(IGEE) University of BoumerdesBoumerdes35000Algeria Laboratory of the Electrification of Industrial Enterprises University of BoumerdesBoumerdes35000Algeria Electrical Engineering Department Mohamed Boudiaf University of M’silaM’sila28000Algeria Department of Civil and Environmental Engineering King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Interdisciplinary Research Center for Construction and Building Materials King Fahd University of Petroleum&Minerals(KFUPM)Dhahran31261Saudi Arabia

Maintaining the integrity and longevity of structures is essential in many industries,such as aerospace,nuclear,and *** achieve the cost-effectiveness of large-scale systems in petroleum drilling,a strong emphasis on structural durability and monitoring is *** study focuses on the mechanical vibrations that occur in rotary drilling systems,which have a substantial impact on the structural integrity of drilling *** study speciﬁcally investigates axial,torsional,and lateral vibrations,which might lead to negative consequences such as bit-bounce,chaotic whirling,and high-frequency *** events not only hinder the efﬁciency of drilling but also lead to exhaustion and harm to the system’s components since they are difﬁcult to be detected and controlled in real *** study investigates the dynamic interactions of these vibrations,speciﬁcally in their high-frequency modes,usingﬁeld data obtained from measurement while ***ﬁndings have demonstrated the effect of strong coupling between the high-frequency modes of these vibrations on drilling sys-tem *** obtained results highlight the importance of considering the interconnected impacts of these vibrations when designing and implementing robust control ***,integrating these compo-nents can increase the durability of drill bits and drill strings,as well as improve the ability to monitor and detect ***,by exploiting theseﬁndings,the assessment of structural resilience in rotary drilling systems can be ***,the study demonstrates the capacity of structural health monitoring to improve the quality,dependability,and efﬁciency of rotary drilling systems in the petroleum industry.

关键词： Rotary drilling systems mechanical vibrations structural durability dynamic interaction analysis ﬁeld data analysis

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Intelligent Deep Learning Enabled Wild Forest Fire Detection system

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Computer systems science & Engineering 2023年第2期44卷 1485-1498页

作者： ahmed s.Almasoud Department of Information systems College of Computer and Information SciencesPrince Sultan UniversityRiyadh11586Saudi Arabia

The latest advancements in computer vision and deep learning(DL)techniques pave the way to design novel tools for the detection and monitoring of forestﬁ*** this view,this paper presents an intelligent wild forestﬁre detec-tion and alarming system using deep learning(IWFFDA-DL)*** pro-posed IWFFDA-DL technique aims to identify forestﬁres at earlier stages through integrated *** proposed IWFFDA-DL system includes an Inte-grated sensor system(Iss)combining an array of sensors that acts as the major input source that helps to forecast theﬁ***,the attention based convolution neural network with bidirectional long short term memory(ACNN-BLsTM)model is applied to examine and identify the existence of *** hyperpara-meter tuning of the ACNN-BLsTM model,the bacterial foraging optimization(BFO)algorithm is employed and thereby enhances the detection ***,when theﬁre is detected,the Global system for Mobiles(GsM)modem transmits messages to the authorities to take required *** extensive set of simulations were performed and the results are investigated interms of several *** obtained results highlight the betterment of the IWFFDA-DL techni-que interms of various measures.

关键词： Forestﬁre deep learning intelligent models metaheuristics integrated sensor system hyperparameter tuning

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