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Solution-processed quantum dot SnO_(2) as an interfacial electron transporter for stable fully-air-fabricated metal-free perovskite solar cells

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Journal of materiomics 2022年第6期8卷 1172-1183页

作者： Rabie m.Youssef A.m.S.Salem Ahmed Shawky Shaker Ebrahim moataz Soliman mohamed S.A.Abdel-mottaleb Said m.El-sheikh Nanostructured materials and Nanotechnology Department Advanced Materials InstituteCentral Metallurgical Research and Development Institute(CMRDI)P.O.Box:87HelwanCairo11421Egypt Nano-Photochemistry and Solar Chemistry Labs. Department of ChemistryFaculty of ScienceAin Shams UniversityAbbassiaCairoEgypt Department of materials Science Institute of Graduate Studies and ResearchAlexandria UniversityEgypt

Perovskite solar cells could strongly compete with the silicon solar cells in the market soon as illustrated in recent *** this work,promising and stable metal-free perovskite solar cells(PSCs)has been successfully fabricated using an inorganic SnO_(2)/Quantum dot SnO_(2)(QD-SnO_(2))double layer as an efficient electron transport layer via a low-temperature solution *** fully-air fabricated PSCs in the form of FTO/SnO_(2)/QD-SnO_(2)/CH3NH3PbI3/Carbon were tested at different annealed QD-SnO_(2) between 300 and 500℃.The as-prepared QD-SnO_(2) and the fabricated devices are characterized by various techniques,including XRD,XPS,HR-TEm,FE-SEm,UVeviseNIR spectroscopy,PL,and solar *** prepared QD-SnO_(2) at 300℃ has shown well-ordered nanoparticles of 5.6 nm in diameter with superior carrier density(1.5×10^(15) cm^(-3))and highest carrier mobility(64.1 cm^(2)·V^(-1)·s^(-1)),accelerating the carriers separation process within the *** best devices demonstrated a maximum power conversion effi-ciency(PCE)of 11.7%,VOC 0.81 V,JSC 19.5 mA·cm^(-2),and FF 74%.The presence of an interfacial layer of QDSnO_(2) over the blocking SnO_(2) upsurges the band gaps alignment and accelerates the carriers extraction rate affecting the performance of the fabricated perovskite ***,the optimized fabricated devices revealed a shelf stability-life of four months in humid air(40%-50%)with>83%of its initial *** simple synthetic approach can develop the opportunities to transfer the cell from the lab to the market,which will be compatible with large-scale production.

关键词： Solution-processed nanomaterials Perovskite solar cells Electron transport layer Thin film Quantum Dot-SnO_(2)

myeloid-derived suppressor cells induce T cell exhaustion resulting in suppression of antigen-specific immune responses in mice consuming high fat diet

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Myeloid-derived suppressor cells induce T cell exhaustion re...

Effects of an environmental friendly slow-releasing woodchip fertilizer on cabbage production

中华医学会第十二次全国内分泌学学术会议

作者： Shiyi Chen sheikh mohammad Fazle akbar masanori Abe Yoichi Hiasa morikazu Onji Department of Endocrinology The Second Affiliated Hospital of Shantou University Medical College Department of Gastroenterology and metabology Ehime University Graduate School of Medicine Department of medical Sciences Toshiba General Hospital

Background/Aims Obesity and its complications have reached worldwide epidemic *** is a chronic inflammatory condition and associated with increased production of cytokines and exacerbated immune ***,obese

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Forestry Studies in China 2007年第4期9卷 246-250页

作者： sheikh Ali Ahmed Su Kyoung Chun Department of Wood Science & Engineering College of Forest and Environmental Sciences Kangwon National University Chunchon 200-701 Republic of Korea

Wood from three tree species was used for making slow-releasing woodchip fertilizer. Fertilizer made from Populus tomentiglandulosa retained the highest amounts of N （29.04%）, P205 （26.03%） and K20 （16.93%）. On the other band, woodchip fertilizer made from Pinus koraiensis retained the lowest amounts of N （26.22%）, P205 （21.80%） and I（20 （14.49%）. A field experiment was performed in a 50 m^2 experimental plot at Gangwon Agricultural Research and Extension Services, Chuncheon, Korea from August to November 1999. The effects of a general fertilizer along with compost and slow releasing woodchip fertilizer without compost on the cabbage production were observed. Cabbage production parameters, such as top height, head weight, head height, head width, number of outer and inner leaves, leaf width and head length, increased in the field where Larix kaempferi woodchip fertilizer was added as a basal dose. The result showed that the woodchip fertilizer made from Pinus koraiensis had faster releasing properties compared to other woodchip fertilizers. Without adding any compost in the woodchip fertilized field, woodchip fertilizer showed a superior outcome over a general chemical fertilizer. Although the amount of woodchip fertilizer was larger compared to that of a chemical fertilizer, it increased cabbage production.

关键词： cabbage production fertilizer retention slow releasing fertilizer woodchip fertilizer

Investigation of the sodium storage mechanism of iron fluoride hydrate cathodes using X-ray absorption spectroscopy and mossbauer spectroscopy

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Journal of Energy Chemistry 2023年第2期77卷 535-542,I0014页

作者： Ghulam Ali muhammad akbar Faiza Jan Iftikhar Qamar Wali Beata Kalska Szostko Dariusz Satuła Kyung Yoon Chung Energy Storage Research Center Korea Institute of Science and TechnologyHwarang-ro 14 gil 5Seongbuk-guSeoul 02792South Korea USPCAS-E National University of Sciences and Technology(NUST)H-12Islamabad 44000Pakistan Division of Energy&Environment Technology KIST SchoolKorea University of Science and Technology(UST)Hwarang-ro 14-gil-5Seongbuk-guSeoul 02792South Korea NUTECH School of Applied Sciences and Humanities National University of TechnologyIslamabad 44000Pakistan University of Białystok Faculty of ChemistryCiołkowskiego 1K15-424 BiałystokPoland University of Białystok Faculty of PhysicsCiołkowskiego 1L15-424 BiałystokPoland

Elucidation of a reaction mechanism is the most critical aspect for designing electrodes for highperformance secondary ***,we investigate the sodium insertion/extraction into an iron fluoride hydrate(FeF_(3)·0.5H_(2)O)electrode for sodium-ion batteries(SIBs).The electrode material is prepared by employing an ionic liquid 1-butyl-3-methylimidazolium-tetrafluoroborate,which serves as a reaction medium and precursor for F^(-)*** crystal structure of FeF_(3)·0.5H_(2)O is observed as pyrochlore type with large open 3-D tunnels and a unit cell volume of 1129A^(3).The morphology of FeF_(3)·0.5H_(2)O is spherical shape with a mesoporous *** microstructure analysis reveals primary particle size of around 10 *** FeF_(3)·0.5H_(2)O cathode exhibits stable discharge capacities of 158,210,and 284 mA h g^(-1) in three different potential ranges of 1.5-4.5,1.2-4.5,and 1.0-4.5 V,respectively at 0.05 C *** specific capacities remained stable in over 50 cycles in all three potential ranges,while the rate capability was best in the potential range of 1.5-4.5 *** electrochemical sodium storage mechanism is studied using X-ray absorption spectroscopy,indicating higher conversion at a more discharged ***-situ m?ssbauer spectroscopy strengthens the results for reversible reduction/oxidation of *** results will be favorable to establish high-performance cathode materials with selective voltage window for SIBs.

关键词： Iron fluoride Sodium-ion batteries Pyrochlore X-ray absorption spectroscopy mössbauer spectroscopy

multi-functional pharmacological credence of triterpenoid 16-hydroxy betulinic acid isolated from mikania cordata

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中国药理学与毒理学杂志 2018年第4期32卷 253-254页

作者： m. Oliur RAHmAN Shah Alam SIDDIQUI Atiqur RAHmAN mohammad Ahsanul akbar mohammad Ajmal ALI Department of Botany University of Dhaka Dhaka 1000 Bangladesh Department ofApplied Chemistry and Chemical Engineering Islamic University Kushtia 7003 Bangladesh Department of Clinical Pharmacy and Pharmacology University of Dhaka Dhaka 1

OBJECTIVE To isolate and characterize bioactive compound from traditionally important medicinal plant mikania cordata,and to investigate muti-faced pharmacological activities of the isolated *** A triterpeenoid,16-hydroxy betulinic acid(16 HBA) was isolated from mikania cordata leaf and the structure of the compound was determined by NmR spectroscopic *** activity of 16 HBA was tested by disc diffusion method and minimum inhibitory concentration(mIC) against the tested microorganisms was *** analgesic property of 16 HBA was tested using acetic acid-induced writhes in mice and hot plate thermal stimulation in *** anti-inflammatory activity was studied using carrageenin-induced paw edema *** antipyretic potential of 16 HBA was evaluated by using yeast-induced hyperthermia in *** The triterpenoid 16 HBA showed potent antibacterial activity with inhibition zone of diameter ranging from 12.0~17.5 mm and antifungal activity with mycelial growth inhibition ranges from 37.6%~54.5%.The mIC values for antibacterial and antifungal activities ranged from 31.5~125 and 250~1000 μg·mL-1 *** compound(50 and100 mg·kg^(-1) body weight) showed potent peripheral and central analgesic activity having 55.19% and41% of writhing inhibition at 90 min after administration of the compound and the highest 55.98%,79.18% elongation of reaction time,*** anti-inflammatory activity screening,the compound(100 mg·kg^(-1)) revealed the highest 77.08% edema inhibition at 4 h after administration of *** antipyretic assay,16 HBA exhibited a strong antipyretic effect in yeast-induced *** The present study confirmed that 16-hydroxy betulinic acid isolated from mikania cordata has potent antimicrobial,analgesic,anti-inflammatory and antipyretic *** results can be seen as scientific support for the traditional and folklore usage of mikania cordata in Bangladesh for the treatment of differen

关键词：药用植物薇甘菊活性化学物药物分析

Herbaceous species diversity in relation to fire severity in Zagros oak forests,Iran

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Journal of Forestry Research 2014年第1期25卷 113-120页

作者： morteza Pourreza Seyed mohsen Hosseini Ali akbar Safari Sinegani mohammad matinizadeh Seyed Jalil Alavai Department of forestry Tarbiat Modares University Soil department Bu-Ali Sina University Research Institute of forest and range lands

Zagros forests are mainly covered byQuercus brantii L. coppices and oak sprout clumps occupy the forest area like patches. We investigated post-fire herbaceous diversity in the first growing season after fire. For this purpose neighboring burned and unburned areas were selected with the same plant species and ecological conditions. The data were collected from areas subjected to different fire severities. Overall 6 treatments were considered with respect to fire severity and the mi-crosites of inside and outside of oak sprout clumps including： unburned inside and outside of sprout clumps （Ni and No）, inside of sprout clumps that burned with high fire severity （H）, inside of sprout clumps that burned with moderate fire severity （m）, outside of sprout clumps that burned with low fire severity （OH and Om）. Different herbaceous com-position was observed in the unburned inside and outside of oak sprout clumps. The species diversity and richness were increased in treatments burned with low and moderate fire severity. However, in treatment burned with high fire severity （H）, herbaceous cover was reduced, even-ness was increased, and richness and diversity were not significantly changed. We concluded that besides the microsites conditions in forest, fire severity is an inseparable part of the ecological effect of fire on her-baceous composition.

关键词： biodiversity fire severity Oak sprout clump Zagros forests,microsite

Effects of moringa oleifera aqueous extract on the growth performance,blood characteristics,and histological features of gills and livers in Nile tilapia

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Aquaculture and Fisheries 2024年第1期9卷 85-92页

作者： mahamoud A.Emam Ramy m.Shourbela Waleed N.El-Hawarry Seham Y.Abo-Kora Fatma Abdel-monem Gad Ashraf m.Abd El-latif mahmoud A.O.Dawood Histology Department Faculty of Veterinary MedicineBenha UniversityBenha13511Egypt Department of Animal Husbandry and Animal Wealth Development Faculty of Veterinary MedicineAlexandria UniversityAlexandria22758Egypt Pharmacology Department Faculty of Veterinary MedicineBenha UniversityBenha13511Egypt Clinical Pathology Department Faculty of Veterinary MedicineBenha UniversityBenha13511Egypt Department of Aquatic Animal Diseases and management Faculty of Veterinary MedicineBenha UniversityBenha13511Egypt Animal Production Department Faculty of AgricultureKafrelsheikh UniversityKafr El-Sheikh33511Egypt The Center for Applied Research on the Environment and Sustainability The American University in CairoCairo11835Egypt

moringa oleifera is well known as a highly nutritious plant and a water purifier in fish *** fish has many impressive qualities making them very suitable for ***,this study aimed to evaluate the effect of supplementation of moringa oleifera aqueous extract(mOAE)at varying concentrations(0,100,200,and 400 mg/kg diet for 90 days)on growth performance,hematological,and some biochemical parameters of Nile ***,histological changes and immunohistochemical expression of caspase 3 in gills and livers were *** enhancements(Pmoglobin,packed cell volume,white blood cells,and total serum protein were observed in fish fed 200 mg mOAE/kg diet compared with other ***,a significant reduction(Pmg mOAE/kg diet revealed disturbance in the corresponding *** histological degenerative changes were detected in the gills and liver of fish fed 400 mg mOAE/kg *** comparison,fish fed 200 mg mOAE/kg diet showed the best histo-architectures of these organs compared with other *** immune expressions of caspase 3 were determined where gills and liver of fish fed 400 mg mOAE/kg diet revealed extensive number of positive caspase 3 cells indicating severe apoptotic ***,a dietary mOAE at 200 mg/kg diet is recommended to improve the growth performance,hematological parameters,liver and kidney functions in Nile ***,caution must be considered when using mOAE at a concentration over 200 mg/kg diet.

关键词： Growth performance Liver Gills moringa oleifera Nile tilapia

Pharmacognostic studies of stem,roots and leaves of malva parviflora L.

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Asian Pacific Journal of Tropical Biomedicine 2014年第5期4卷 410-415页

作者： Shehla akbar Uzma Hanif Jaffar Ali Saiqa Ishtiaq University College of Pharmacy University of the Punjab Department of Botany Government College University Department of Botany University of the Punjab

Objective:To establish quality control parameters of a locally occurring medicinal plant,malva parviflora which is utilized as folk medicine in Sialkot area in ***:In pharmacognostic studies different types of evaluations were carried out that focus on microscopic,macroscopic,fluorescence analysis and organoleptic ***:The distinguishing characters of stem were the presence of parenchyma,cork cells,irregular shape calcium oxalate crystals,simple and compound starch granules and fusiform fibers with *** microscopic characters were presence of simple and spherical starch granules with rounded or slit hilum,groups of lignified xylem fibers,reticulate vessek,and sieve *** microscopy indicated the presence of paracytic stomata,lignified fibers having pits,spiral and annular vessels,numerous sclereids while in fruit microscopy epicarp,thin walled cells endocarp,thin walled parenchyma and collenchyma of mesocarp and abundant thick walled endospermic cells containing aleurone grains and micro rosette *** study of leaves showed,5-7 lobed reniform-shape,glabrous-surface,reticulate-venation in the *** features of roots showed type of root-taproot,surface-glabrous and stem was 1-10dm tall simple to branched and may be prostrate or *** fruit was of schizocarp ***:This study provides the scientific data for the proper identification and establishment of standards for the use of malva parviflora.

关键词： malva parviflora Stomatal index Palisade ratio Chloral hydrate Evaluation Transverse section

Improving Performance of Recurrent Neural Networks Using Simulated Annealing for Vertical Wind Speed Estimation

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Energy Engineering 2023年第4期120卷 775-789页

作者： Shafiqur Rehman HilalH.Nuha Ali Al Shaikhi Satria akbar mohamed mohandes Interdisciplinary Research Center for Renewable Energy and Power Systems(IRC-REPS) KFUPMDhahran31261Saudi Arabia HUmIC Engineering School of ComputingTelkom UniversityBandung40257Indonesia Electrical Engineering Department King Fahd University of Petroleum&Minerals(KFUPM)Dhahran31261Saudi Arabia

An accurate vertical wind speed(WS)data estimation is required to determine the potential for wind farm *** general,the vertical extrapolation of WS at different heights must consider different parameters fromdifferent locations,such as wind shear coefficient,roughness length,and atmospheric *** novelty presented in this article is the introduction of two steps optimization for the Recurrent Neural Networks(RNN)model to estimate WS at different heights using measurements from lower *** first optimization of the RNN is performed to minimize a differentiable cost function,namely,mean squared error(mSE),using the Broyden-Fletcher-Goldfarb-Shanno ***,the RNN is optimized to reduce a non-differentiable cost function using simulated annealing(RNN-SA),namely mean absolute error(mAE).Estimation ofWS vertically at 50 m height is done by training RNN-SA with the actualWS data a 10–40 m *** estimatedWS at height of 50 m and the measured WS at 10–40 heights are further used to train RNN-SA to obtain WS at 60 m *** procedure is repeated continuously until theWS is estimated at a height of 180 *** RNN-SA performance is compared with the standard RNN,multilayer Perceptron(mLP),Support Vector machine(SVm),and state of the art methods like convolutional neural networks(CNN)and long short-term memory(LSTm)networks to extrapolate theWS *** estimated values are also compared with realWS dataset acquired using LiDAR and tested using four error metrics namely,mean squared error(mSE),mean absolute percentage error(mAPE),mean bias error(mBE),and coefficient of determination(R2).The numerical experimental results show that the mSE values between the estimated and actualWS at 180mheight for the RNN-SA,RNN,mLP,and SVm methods are found to be 2.09,2.12,2.37,and 2.63,respectively.

关键词： Vertical wind speed estimation recurrent neural networks simulated annealing multilayer perceptron support vector machine