Subjects -> CHEMISTRY (Total: 928 journals)
    - ANALYTICAL CHEMISTRY (59 journals)
    - CHEMISTRY (661 journals)
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    - PHYSICAL CHEMISTRY (65 journals)

CHEMISTRY (661 journals)            First | 1 2 3 4 | Last

Showing 401 - 600 of 735 Journals sorted alphabetically
Journal of Molecular Liquids     Hybrid Journal   (Followers: 3)
Journal of Molecular Modeling     Hybrid Journal   (Followers: 5)
Journal of Molecular Recognition     Hybrid Journal   (Followers: 2)
Journal of Molecular Spectroscopy     Hybrid Journal   (Followers: 6)
Journal of Molecular Structure     Hybrid Journal   (Followers: 6)
Journal of Nanoparticles     Open Access   (Followers: 4)
Journal of Nanostructure in Chemistry     Open Access   (Followers: 8)
Journal of Organometallic Chemistry     Hybrid Journal   (Followers: 25)
Journal of Photochemistry and Photobiology     Open Access  
Journal of Photochemistry and Photobiology A: Chemistry     Hybrid Journal   (Followers: 3)
Journal of Photochemistry and Photobiology B: Biology     Hybrid Journal   (Followers: 4)
Journal of Photochemistry and Photobiology C: Photochemistry Reviews     Full-text available via subscription   (Followers: 3)
Journal of Polymer & Composites     Full-text available via subscription   (Followers: 17)
Journal of Polymer and Biopolymer Physics Chemistry     Open Access   (Followers: 7)
Journal of Polymer Science Part A: Polymer Chemistry     Hybrid Journal   (Followers: 92)
Journal of Polymers     Open Access   (Followers: 7)
Journal of Porphyrins and Phthalocyanines     Hybrid Journal   (Followers: 1)
Journal of Progressive Research in Chemistry     Open Access  
Journal of Pure and Applied Chemistry Research     Open Access   (Followers: 3)
Journal of Raman Spectroscopy     Hybrid Journal   (Followers: 14)
Journal of Research and Education Chemistry     Open Access   (Followers: 1)
Journal of Research Updates in Polymer Science     Hybrid Journal   (Followers: 2)
Journal of Rubber Research     Hybrid Journal   (Followers: 1)
Journal of Saudi Chemical Society     Open Access  
Journal of Solid State Chemistry     Hybrid Journal   (Followers: 13)
Journal of Solution Chemistry     Hybrid Journal   (Followers: 1)
Journal of Structural Chemistry     Hybrid Journal   (Followers: 1)
Journal of Sulfur Chemistry     Hybrid Journal   (Followers: 1)
Journal of Supercritical Fluids     Hybrid Journal   (Followers: 3)
Journal of Superhard Materials     Hybrid Journal  
Journal of Surface Science and Technology     Hybrid Journal  
Journal of Surfactants and Detergents     Hybrid Journal   (Followers: 3)
Journal of Taibah University for Science     Open Access  
Journal of the American Chemical Society     Hybrid Journal   (Followers: 324)
Journal of the American Society for Mass Spectrometry     Hybrid Journal   (Followers: 32)
Journal of the American Society of Brewing Chemists     Full-text available via subscription   (Followers: 2)
Journal of the Chilean Chemical Society     Open Access   (Followers: 2)
Journal of the Chinese Chemical Society     Hybrid Journal  
Journal of the Indian Chemical Society     Hybrid Journal  
Journal of The Indonesian Society of Integrated Chemistry     Open Access  
Journal of the Iranian Chemical Society     Hybrid Journal   (Followers: 1)
Journal of the Korean Society for Applied Biological Chemistry     Hybrid Journal  
Journal of the Mexican Chemical Society     Open Access   (Followers: 1)
Journal of the Serbian Chemical Society     Open Access  
Journal of the Turkish Chemical Society, Section A : Chemistry     Open Access  
Journal of Theoretical and Computational Chemistry     Hybrid Journal   (Followers: 9)
Jurnal Inovasi Pendidikan Kimia     Open Access  
Jurnal Kimia (Journal of Chemistry)     Open Access  
Jurnal Kimia Riset     Open Access  
Jurnal Pendidikan Kimia     Open Access  
Jurnal Penelitian Sains (JPS)     Open Access  
Karbala International Journal of Modern Science     Open Access  
Kinetics and Catalysis     Hybrid Journal   (Followers: 4)
Konfigurasi : Jurnal Pendidikan Kimia dan Terapan     Open Access  
Korea-Australia Rheology Journal     Hybrid Journal   (Followers: 1)
Langmuir     Hybrid Journal   (Followers: 58)
Lebensmittelchemie     Hybrid Journal   (Followers: 1)
Lipid Insights     Open Access  
Luminescence     Hybrid Journal   (Followers: 2)
Macromolecular Materials & Engineering     Hybrid Journal   (Followers: 5)
Macromolecular Rapid Communications     Hybrid Journal   (Followers: 10)
Macromolecular Research     Hybrid Journal   (Followers: 2)
Macromolecular Symposia     Hybrid Journal   (Followers: 3)
Macromolecular Theory and Simulations     Hybrid Journal   (Followers: 2)
Macromolecules     Hybrid Journal   (Followers: 48)
Magnetic Resonance in Chemistry     Hybrid Journal   (Followers: 8)
Magnetochemistry     Open Access  
Marine Chemistry     Hybrid Journal   (Followers: 6)
Marine Drugs     Open Access   (Followers: 1)
MATEC Web of Conferences     Open Access  
Materials Advances     Open Access   (Followers: 2)
Materials and Devices     Open Access  
Materials Characterization     Hybrid Journal   (Followers: 32)
Materials Chemistry Frontiers     Hybrid Journal   (Followers: 4)
Materials Horizons     Hybrid Journal   (Followers: 6)
Materials Research Bulletin     Hybrid Journal   (Followers: 25)
Materials Science-Poland     Open Access   (Followers: 1)
Materials Sciences and Applications     Open Access   (Followers: 2)
Medicinal Chemistry Research     Hybrid Journal   (Followers: 9)
Mediterranean Journal of Chemistry     Open Access  
Metallography, Microstructure, and Analysis     Hybrid Journal   (Followers: 1)
Micro and Nano Systems Letters     Open Access   (Followers: 6)
Microchimica Acta     Hybrid Journal   (Followers: 2)
Microporous and Mesoporous Materials     Hybrid Journal   (Followers: 9)
Modern Chemistry & Applications     Open Access   (Followers: 1)
Modern Research in Catalysis     Open Access  
Molbank     Open Access  
Molecular Catalysis     Hybrid Journal   (Followers: 6)
Molecules     Open Access   (Followers: 4)
Molecules and Cells     Hybrid Journal   (Followers: 1)
Monatshefte für Chemie - Chemical Monthly     Hybrid Journal   (Followers: 4)
Mongolian Journal of Chemistry     Open Access  
Moscow University Chemistry Bulletin     Hybrid Journal   (Followers: 1)
MRS Bulletin     Full-text available via subscription   (Followers: 4)
Nachrichten aus der Chemie     Hybrid Journal   (Followers: 18)
Nano Convergence     Open Access   (Followers: 1)
Nano Materials Science     Open Access   (Followers: 1)
Nano Reviews & Experiments     Open Access   (Followers: 14)
Nano Select     Open Access   (Followers: 1)
Nanochemistry Research     Open Access   (Followers: 1)
Nanoscale     Hybrid Journal   (Followers: 18)
Nanoscale Advances     Open Access  
Nanoscale Horizons     Hybrid Journal  
Nanoscale Research Letters     Open Access   (Followers: 8)
Nanoscience and Nanotechnology Letters     Full-text available via subscription   (Followers: 24)
Natural Product Communications     Open Access  
Natural Product Reports     Hybrid Journal   (Followers: 10)
Natural Science     Open Access   (Followers: 8)
Natural Volatiles & Essential Oils     Open Access  
Nature Chemistry     Full-text available via subscription   (Followers: 97)
Nature Protocols     Full-text available via subscription   (Followers: 72)
Nature Reviews Chemistry     Hybrid Journal   (Followers: 17)
New Journal of Chemistry     Hybrid Journal   (Followers: 17)
Nitric Oxide     Hybrid Journal  
Nitrogen     Open Access  
Nukleonika     Open Access  
Open Chemistry Journal     Open Access  
Open Conference Proceedings Journal     Open Access  
Open Journal of Chemistry     Open Access  
Open Journal of Composite Materials     Open Access   (Followers: 22)
Open Journal of Inorganic Non-metallic Materials     Open Access   (Followers: 2)
Open Journal of Medicinal Chemistry     Open Access   (Followers: 4)
Open Journal of Polymer Chemistry     Open Access   (Followers: 12)
Open Journal of Synthesis Theory and Applications     Open Access  
Open Medicinal Chemistry Journal     Open Access  
Orbital - The Electronic Journal of Chemistry     Open Access   (Followers: 1)
Organic & Biomolecular Chemistry     Hybrid Journal   (Followers: 57)
Organometallics     Hybrid Journal   (Followers: 19)
Oxidation of Metals     Hybrid Journal   (Followers: 16)
Passer Journal of Basic and Applied Sciences     Open Access  
Peptide Science     Full-text available via subscription  
Pharmaceuticals     Open Access   (Followers: 4)
Pharmaceutics     Open Access   (Followers: 5)
Phosphorus, Sulfur, and Silicon and the Related Elements     Hybrid Journal   (Followers: 2)
Photochemistry and Photobiology     Hybrid Journal   (Followers: 3)
Physical Science International Journal     Open Access  
Physics and Materials Chemistry     Open Access   (Followers: 1)
Phytochemistry     Hybrid Journal   (Followers: 4)
Phytochemistry Letters     Full-text available via subscription   (Followers: 1)
Plasma     Open Access   (Followers: 3)
Plasma Chemistry and Plasma Processing     Hybrid Journal   (Followers: 3)
Polycyclic Aromatic Compounds     Hybrid Journal  
Polyhedron     Hybrid Journal   (Followers: 4)
Polymer Chemistry     Hybrid Journal   (Followers: 24)
Polymer crystallization     Hybrid Journal  
Polymer Degradation and Stability     Hybrid Journal   (Followers: 23)
Polymer Engineering & Science     Hybrid Journal   (Followers: 14)
Polymer Reviews     Hybrid Journal   (Followers: 32)
Polymer Science Series D     Hybrid Journal   (Followers: 3)
Polymer Testing     Hybrid Journal   (Followers: 194)
Polymer-Plastics Technology and Materials     Hybrid Journal   (Followers: 5)
Polymers     Open Access   (Followers: 21)
Polymers from Renewable Resources     Hybrid Journal  
Proceedings of the Combustion Institute     Full-text available via subscription   (Followers: 8)
Processes     Open Access  
Progress in Lipid Research     Hybrid Journal   (Followers: 3)
Progress in Organic Coatings     Hybrid Journal   (Followers: 7)
Progress in Polymer Science     Full-text available via subscription   (Followers: 36)
Progress in Reaction Kinetics and Mechanism     Open Access  
Progress in Solid State Chemistry     Full-text available via subscription   (Followers: 3)
Progress in Surface Science     Full-text available via subscription   (Followers: 3)
Protein Science     Hybrid Journal   (Followers: 45)
Radiochemistry     Hybrid Journal   (Followers: 1)
Rapid Communications in Mass Spectrometry     Hybrid Journal   (Followers: 33)
Reaction Chemistry & Engineering     Hybrid Journal  
Reaction Kinetics, Mechanisms and Catalysis     Hybrid Journal   (Followers: 3)
Reactions     Open Access  
Reportes Científicos de la FaCEN     Open Access  
Research Journal of Phytochemistry     Open Access   (Followers: 1)
Resources Chemicals and Materials     Full-text available via subscription   (Followers: 3)
Results in Chemistry     Open Access  
Results in Geochemistry     Open Access  
Results in Surfaces and Interfaces     Open Access  
Review Journal of Chemistry     Hybrid Journal   (Followers: 1)
Reviews in Mineralogy and Geochemistry     Hybrid Journal   (Followers: 4)
Revista Boliviana de Química     Open Access  
Revista CENIC. Ciencias Quimicas     Open Access  
Revista Colombiana de Ciencias Químico-Farmacéuticas     Open Access  
Revista Colombiana de Química     Open Access  
Revista Cubana de Química     Open Access  
Revista de Ciencia y Tecnología     Open Access  
Revista de Ciencias     Open Access  
Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales     Open Access  
Revista de la Sociedad Química del Perú     Open Access  
Revista de la Societat Catalana de Química     Open Access  
Revista de Química     Open Access   (Followers: 4)
Revista Debates em Ensino de Química     Open Access  
Revista ION     Open Access  
RSC Advances     Open Access   (Followers: 27)
RSC Chemical Biology     Open Access  
RSC Medicinal Chemistry     Hybrid Journal   (Followers: 6)
Russian Journal of Bioorganic Chemistry     Hybrid Journal   (Followers: 1)
Russian Journal of Coordination Chemistry     Hybrid Journal   (Followers: 1)
Russian Journal of General Chemistry     Hybrid Journal   (Followers: 1)
Russian Journal of Inorganic Chemistry     Hybrid Journal  
Sainstek : Jurnal Sains dan Teknologi     Open Access  
Science China Chemistry     Hybrid Journal   (Followers: 2)
Science Talks     Full-text available via subscription   (Followers: 2)
Sciences & Technologie A : sciences exactes     Open Access  
Scientific Journal of Frontier Chemical Development     Open Access   (Followers: 2)

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Karbala International Journal of Modern Science
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2405-609X - ISSN (Online) 2405-6103
Published by Digital Commons Homepage  [8 journals]
  • Simulating photo-disintegration of 137Cs radioactive waste using various
           energies of gamma photons

    • Authors: Hassanain H. Alkazzaz et al.
      Abstract: In this study, the possibility of using gamma-ray in photo-disintegration method was examined so that it can be used in the remediation of 137Cs radionuclides waste materials by nuclear transmutation to convert long-lived nuclides to other isotopes nuclides, which are shorter half-life (or stable), by different photo-nuclear reaction channels (γ,n), (γ,2n), (γ,p), (γ, a), (γ,d). A simulation code has been written using MATLAB for conducting calculations of reduction and residual. The results showed that gamma-ray fluxes below 1017 [cm-2 s-1] are not adequate to perform effective incinera-tion of 137Cs, and as for gamma flux of 1018 [cm-2 s-1] it showed that it provides incineration rate of about 100 times faster than the natural decay of cesium 137. This paper also shows that the recommended range of incineration photons energy Eγ should be between 8.27
      PubDate: Sun, 15 May 2022 07:56:09 PDT
       
  • Engineering of a Multi-Epitope Subunit Vaccine Against SASRS-CoV-2 Through
           the Viroinformatic Approach

    • Authors: Aamir Shehzada et al.
      Abstract: The COVID-19 outbreak has infected millions of people worldwide, but no vaccine has been discovered to combat it efficiently. This research aims to design a multi-epitope vaccine using highly efficient B- and T-cell epitopes from the SARS-CoV-2 Surabaya isolate through a viroinformatic approach. First, the putative epitopes were linked together to develop tertiary structures and then docked with toll-like receptor 4 (TLR-4) that demonstrated a robust interaction with a low eigenvalue of 4.816138 e-06. Furthermore, the structure's high immunogenic response was observed and successfully cloned into the expression vector pET28a (+). This implies that the designed vaccine can prove effective in combating SARS-CoV-2.
      PubDate: Sun, 15 May 2022 07:56:03 PDT
       
  • A Machine Learning based Approach to Detect the Ethereum Fraud
           Transactions with Limited Attributes

    • Authors: Rabia Musheer Aziz et al.
      Abstract: Ethereum smart contracts have recently received new commercial applications and a lot of attention from the scientific community. Ethereum eliminates the requirement for a trusted third party by allowing untrusted parties to expose contract details in computer code. Nonetheless, as online commerce grows, plenty of fraudulent activities, such as money laundering, bribery, and phishing, emerge as major threats to trade security. For correctly recognizing fraudulent transactions, this paper developed a Light Gradient Boosting Machine (LGBM) technique-based model. The modified LGBM model optimized the parameters of Light GBM using the Euclidean distant structured estimation approach. This paper also examines the performance of different popular models such as Random Forest (RF), Multi-Layer Perceptron (MLP), Logistic Regression, k-Nearest Neighbors (KNN), XGBoost, Support Vector Classification (SVC), and ADAboost with limited features and compares their performance metrics with the proposed model for Ethereum fraudulent activity classification. A comparative performance evaluation matrices scores of different popular models along with the proposed model demonstrated the applicability of the proposed approach. The modified LGBM algorithms and RF models demonstrate the best performance compared to other models with the highest accuracies, while the modified LGBM algorithm has a slightly superior performance of 99.17 percent compared to the RF model's 98.26 percent.
      PubDate: Thu, 05 May 2022 03:21:38 PDT
       
  • A Bi-Level Data Lowering Method to Minimize Transferring Big Data in the
           Sensors of IoT Applications

    • Authors: Ali Kadhum M. Al-Qurabat et al.
      Abstract: In the IoT era, the number of devices connected to it continues to grow significantly. This can lead to an increase in the amount of reported data by these IoT devices. The reported data by the Sensor Nodes (SNs) to the Gateway (GW) drives these IoT sensors to consume their energy and storage. These problems can be solved by reducing the amount of data in the source nodes in order to reduce both the amount of energy consumed and the amount of storage required. Energy consumption represents one aspect of the Quality of Service (QoS) in the sensor nodes of the IoT. A Bi-Level Data Lowering (BLDL) approach is suggested in this article that operates at both the sensor node and gateway levels. To function in constrained IoT devices at the first level, lightweight data compression approaches were used. Delta encoding is accompanied by RLE. Two more optimization methods have been proposed for the sake of minimizing the amount of sent data as much as possible at the first level. In the second level, clustering hierarchically based on Minimum Description Length (MDL) theory was used to cluster the first level data sets. After that, the evaluation of BLDL efficiency is based on real data and the use of the OMNeT++ simulator. The findings indicate that the suggested approach reduces the overhead for the network resources as follows: At a maximum of 20.53% in BLDL and 6.14% in LBLDL for the ratio of data remaining, and a maximum of 62% in BLDL and 21% in LBLDL for the ratio of sent data sets to the GW, the required energy to send data sets to the GW is reduced from 6% to 43% in BLDL and from 79% to 85% in LBLDL, and accuracy is higher than 90% for the methods without loss and 80% for the methods with a loss when compared to existing methods.
      PubDate: Thu, 05 May 2022 03:21:33 PDT
       
  • An economical source for peroxidase: maize cobs

    • Authors: Hathama Razooki Hasan et al.
      Abstract: According to the current situation of peroxidase (POD), the relevant studies on this enzyme indicated its importance as a tool in clinical biochemistry and different industrial fields. Most of these studies used the fruits and vegetables as source of this enzyme. So that in order to couple the growing requirements for POD with the recent demands for reduc-ing disposal volume by recycling the plant waste, the aim of the present study was to extract POD through management of municipal bio-waste of Iraqi maize species. A simple, green and economical method was used to extract this enzyme. Our results revealed that maize cobs are rich sources of POD, where the activity of this enzyme was found to be 7035.54 U/g of cobs. In pilot experiments this enzyme was extracted from the cobs using an efficient extraction buffer with either Cetyl Trimethyl Ammonium Bromide (CTAB), or sonication. To purify the extracted enzyme the previous step was followed by aqueous two phase extraction (ATPE) using 20% (w/v) polyethylene glycol (PEG) and 9% (w/v) ammonium sulfate. The obtained results indicated that POD was partially purified with 2.36 fold of purification and 81.78% recovery. The optimum temperature and pH of the extracted POD activity as well as the enzyme thermal stabil-ity were determined and found to be 20°C, pH 6, and stable at 60°C for 10 minutes respectively. Out of the present study findings, it can be concluded that maize cobs are rich source for POD and the applied protocol could be poten-tially used for POD extraction with high level. Meantime, this study suggested a new strategy by which the environ-mental pollution results from accumulation of plant waste can be reduced.
      PubDate: Thu, 05 May 2022 03:21:27 PDT
       
  • Efficient removal of common organic pollutants from water by Zn-doped TiO2
           nanoparticles with different applications

    • Authors: Khaled Elgendy et al.
      Abstract: Water purification via adsorption without energy consumption was considered a green process. Zn-doped TiO2 nanoparticles were fabricated by the Sol-gel method and characterized by different analysis techniques. Zinc doping of TiO2 increases the surface area to 26.7m2g-1 with adsorption results, 75.1%, 71.1%, and 68.2% for methylene blue, ofloxacin, and SLS, respectively. Variable affecting factors on adsorption have been studied. The adsorption behavior fitted with Langmuir and Freundlich equations than Temkin isotherm, indicating the preferred heterogeneous adsorption at equivalent adsorbent sites. The application of nanoparticles in many synthetic specimens of pollutants gave excellent removal results, which exceeded 75% of detoxification.
      PubDate: Thu, 05 May 2022 03:21:22 PDT
       
  • Synthesis of CuO/ZnO and MgO/ZnO Core/Shell Nanoparticles with Plasma Gets
           and Study of their Structural and Optical Properties

    • Authors: Raghad S. Mohammed et al.
      Abstract: This paper reports the synthesis of CuO/ZnO and MgO/ZnO core/shell nanoparticles using atmospheric plasma jets. The characterization of the synthesized CuO/ZnO and MgO/ZnO core/shell nanoparticles were confirmed by a series of techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray dispersive spectroscopy (EDS), transmission electron microscopy (TEM), and UV–Vis spectroscopy. The XRD analysis confirmed no other peaks related to the secondary phases for CuO, MgO, or ZnO, indicating the purity of these nanoparticles. Additionally, EDX analysis confirmed the formation of high purity CuO/ZnO and MgO/ZnO core/shell nanoparticles. The surface morphology, which represented the high agglomeration rate, was investigated using SEM. TEM analysis showed that the sizes of the CuO/ZnO and MgO/ZnO core/shell nanoparticles were 32 nm and 70 nm, respectively. The energy bandgaps were 3.3 eV and 3.1 eV for the CuO/ZnO and MgO/ZnO core/shell nanoparticles.
      PubDate: Thu, 05 May 2022 03:21:16 PDT
       
  • Numerical Analysis of A Silicon-Based Electro-Optic Modulator

    • Authors: Mario Alberto García-Ramírez et al.
      Abstract: A phase shift electro-optic semiconductor structure that features a Mach-Zehnder Interferometer (MZI) is numerically analyzed. The interferometer structure considers a highly-doped Si-based waveguide that can control the phase shift by varying the refractive index through the carrier concentration while applying a control voltage. To analyze the structure, Kramers-Kronig dispersion relations, the effective index method and the Drude model are implemented within a finite element software. As a result, for an optical waveguide structure with a 9 mm length and 10 V, it is possible to obtain a phase shift by that allows, at the output of the MZI, total interference that is required to modulate an optical communication link.
      PubDate: Thu, 05 May 2022 03:21:10 PDT
       
  • Partial Pseudo-Random Hashing for Transactional Memory Read/Write Data
           Processing and Validation

    • Authors: G M Sridevi et al.
      Abstract: Development of a bypass parallel processing block is one of the emerging and interesting research areas in memory read/write application domain. Many Random Number Generation (RNG) techniques have been introduced for processing the data in storage memory. But the limitations include reduced efficiency, increased computational complexity, high area consumption and higher cost. This paper presents a novel dynamic memory register with optimal XOR design based on partial pseudo-random hashing to process transactional memory read/write data. Transfer characteristics of the current are analysed based on the pseudo differential pair for proficient memory utilization. A memory window is then created and adjusted for obtaining an optimal power flow with lesser data loss. The performance of the proposed design is evaluated using different performance measures. The power consumed for processing the data using the proposed design is reduced to nearly 25% when compared to other proposed designs along with reduced component usage. Delay is reduced to 2.31ns and a 15% improvement in frequency and nearly 4% increase in throughput is seen when compared to existing methods.
      PubDate: Thu, 05 May 2022 03:21:05 PDT
       
  • A Content-based File Identification Dataset: collection, construction, and
           evaluation

    • Authors: Saja Dheyaa Khudhur et al.
      Abstract: File-Type Identification (FTI) is one of the essential functions that can be performed by examining the data blocks' magic numbers. However, this examination leads to a challenge when a file is corrupt, or these magic numbers are missing. Content-based analytics is the best way for file type identification when the magic numbers are not available. This paper prepares and presents a content-based dataset for eight common types of files based on twelve features. We designed our dataset to be used for supervised and unsupervised machine learning models. It provides the ability to classify and cluster these types into two levels, as a fine-grain level (by their file type exactly, JPG, PNG, HTML, TXT, MP4, M4A, MOV, and MP3) and as a coarse-grain level (by their broad type, image, text, audio, video). A dataset quality and features assessments are performed in this study. The obtained results show that our dataset is high-quality, non-biased, complete, and with an acceptable duplication ratio. In addition, several multi-class classifiers are learned by our data, and classification accuracy of up to 81.8% is obtained. The main contributions of this work are summarized in constructing a new publicly available dataset based on statistical and information content-related features with detailed assessments and evaluation.
      PubDate: Thu, 05 May 2022 03:20:59 PDT
       
  • Structural and Spectroscopic Analysis for Silver Bulk and Nanoparticles

    • Authors: Hajir M. Fadhil et al.
      Abstract: In this research work, a pulsed Nd-YْAG laser having a wavelength of 1064 nm and energy (400-700 mJ (has been utilized as a source in an induced breakdown spectroscopy (LIBS) experiment to determine the density of electron and the tem-perature of Ag-plasma. Two forms of silver (as a bulk and as a compressed nano powder) have been used as targets in the LIBSs setup. The aim of the present work is to study the impact of target properties and laser energy on the plasma fea-tures formed by the interaction between a pulsed laser and these two forms of silver. The structural properties have been characterized via X-ray Diffraction (XRD), Scanning Electron microscopy (SEM) and Energy Dispersed X-Ray Spec-troscopy (EDX). For the two forms of silver, the electron density and the temperature increased with the laser energy rise from (400 mJ) to (700 mJ), and the Ag samples in the form of nano particles manifested enhanced LIBS signals. More-over, the LIBS technique can give complement information to other standard techniques for the material's diagnosis.
      PubDate: Thu, 05 May 2022 03:20:54 PDT
       
  • Nigella sativa Methanol Extract Inhibits PC-3 Cell Line Colonization,
           Induced Apoptosis, and Modulated LC3-based Autophagy

    • Authors: Yusuf TOY et al.
      Abstract: Nigella sativa has various pharmacological properties and has been used throughout history for a variety of reasons. However, there is limited data about the effects of Nigella sativa (NS) on human cancer cells. This study aimed at observing the roles of methanolic extract of N. sativa on apoptosis and autophagy pathway in the Human PC3 (prostate cancer) cell line. The cell viability was checked by MTT assay. Clonogenic assay was performed to demonstrate clonogenicity and Western blot was used to check caspase-3, TIGAR, p53, and LC3 protein expression. The results demonstrated that PC3 cell proliferation was inhibited, caspase-3 and p53 protein expression was induced, and LC3 protein expression was modulated. The clonogenic assay showed that PC3 cell line colonization was restricted. To conclude: N. sativa methanol extract had potent anti-cancer effects that inhibited cell viability, induced apoptosis, and inhibited clonogenicity in the PC3 cell line.
      PubDate: Thu, 05 May 2022 03:20:49 PDT
       
  • Ultrasound-assisted Dibutyl phthalate nanocapsules preparation and its
           application as corrosion inhibition coatings

    • Authors: Uday Bagale et al.
      Abstract: The current research employs an encapsulation of dibutyl phthalate (DBP) as a corrosion inhibitor in situ polymerization using a sonochemical method to form nanocapsules. The prepared nanocapsules were characterization by using Malvern particle size, Fouri-er transforms infrared spectroscopy (FTIR), Scanning electron microscope (SEM) and Transmission electron microscope (TEM), and thermal and mechanical test to check particle size, morphology, and stability of nanocapsules. Later prepared DBP nanocapsules were incorporated in standard epoxy coating to check its corrosion inhibition resistance. The results show that nanocapsules are spherical, with an average particle size of 337 nm. Scratch nanocapsules epoxy coating shows improves coating resistance after 1 day immersion, the values shown for 10% nanocapsules-based coating 8.62 x 1010 while for scratch standard coating is 2.41 x103. Overall thermal and mechanical properties for nanocapsules show better resistance, and electrochemical characterization for scratch nanocapsules coating shows better results than scratch epoxy coating
      PubDate: Thu, 05 May 2022 03:20:43 PDT
       
  • Heterogeneous catalytic degradation of dye by Fenton-like oxidation over a
           continuous system based on Box–Behnken design and traditional batch
           experiments

    • Authors: Imad M. Luaibi et al.
      Abstract: In this study, iron was coupled with copper to form a bimetallic compound through a biosynthetic method, which was then used as a catalyst in the Fenton-like processes for removing direct Blue 15 dye (DB15) from aqueous solution. Characterization techniques were applied on the resultant nanoparticles such as SEM, BET, EDAX, FT-IR, XRD, and zeta potential. Specifically, the rounded and shaped as spherical nanoparticles were found for green synthesized iron/copper nanoparticles (G-Fe/Cu NPs) with the size ranging from 32-59 nm, and the surface area was 4.452 m2/g. The effect of different experimental factors was studied in both batch and continuous experiments. These factors were H2O2 concentration, G-Fe/Cu-NPs amount, pH, initial DB15 concentration, and temperature in the batch system. The batch results showed 98% of 100 mg/L of DB15 was degraded with optimum H2O2 concentration, G-Fe/Cu-NPs dose, pH, and temperature 3.52 mmol/L, 0.7 g/L, 3, and 50℃ respectively. For the continuous mode, the influences of initial DB15 concentration, feed flow rate, G-Fe/Cu-NPs depth were investigated using an optimized experimental Box-Behnken design, while the conditions of pH and H2O2 concentration were based on the best value found in the batch experiments. The model optimization was set the parameters at 2.134 ml/min flow rate, 26.16 mg/L initial dye concentration, and 1.42 cm catalyst depth. All the parameters of the breakthrough curve were also studied in this study including break time, saturation time, length of mass transfer zone, the volume of bed, and volume effluent.
      PubDate: Thu, 05 May 2022 03:20:37 PDT
       
  • Optical Measurement and Performance Prediction of Solar PV System in
           Al-Khidhir Zone/Iraq

    • Authors: Faten Sh. Zainulabdeen et al.
      Abstract: People have tended for investing the sources of renewable energy, especially solar energy, as they are clean and environmentally friendly sources. The present work aims to invest the measured data of solar irradiance, maximum ambient temperatures and wind speed provided by Al Khidhir Meteorological Station to predict the minimum performance of photovoltaic solar systems (NT-R0E3E-SHARP) for electric power generation. The single diode model is used to calculate the minimum output power produced by solar module and its minimum conversion efficiency based on soalr irradiance, maximum ambient temperatures and wind speed throughout 2020. The results indicate that the annual solar irradiance in Al-Khidhir zone on horizontal plane is 2084 kWh/m2/year and the daily averages , approximately, range from 2500 Wh/m2/day in January, as a minimum value, to 8000 Wh/m2/day in July as a maximum value. Accordingly, the monthly average of peak sun hours has its minimum values in winter (3hours in January) and increases toward the summer and reaches its maximum value in July (8 hours), while the annually average is 5.7 hours. The results show that the behavior of predicted rates of output power of solar PV module was conforming to the behavior of solar irradiance along year. The daily averages of output power, approximately, range from 60 W to 100W along year. Due to the thermal effect of solar radiation the degradation percentage in electrical conversion efficiency of mono crystalline silicon solar cell ranges from 7.6% in winter to 24% in summer. From the results of the present work, it can be concluded that the geographical zone of Al-Khidhir and its surroundings are promising for investing solar energy to produce electricity.
      PubDate: Thu, 05 May 2022 03:20:30 PDT
       
  • Development of Effectual Substrates for SERS by Nanostructurs-Coated
           Porous Silicon

    • Authors: Fatima J. Moaen et al.
      Abstract: The current paper provides an efficient method for making active and effectual substrates used for detecting molecules by improving surface-enhanced Raman scattering (SERS). These substrates were fabricated using nanostructure-coated porous silicon. The nanostructures were prepared through the electrical exploding wire (EEW) technique. The silver nanowires (AgNWs) were coated with a polydopamine (PDA) layer to form an AgNWs@PDA colloidal solution. Then, the Ag wire was electrically exploded in the colloidal solution to form the (AgNWs@PDA@AgNPs) plasmonic nanostructures as a metal-insulator-metal. The effect of the plasmonic nanostructures’ morphologies on the absorptances spectra and SERS activities were studied utilising Rhodamine 6G (Rh6G) dye as examination molecules. X-ray diffraction (XRD) was used to investigate the structural properties of these nanostructures. Field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) were used to investigate the morphologies of these nanostructures. Atomic force microscopy (AFM) was used to study the surface topographies of SERS-effectual substrates. A double beam ՍV-Visible Spectrophotometer was used to measure Rh6G laser dye absorptance with a concentration of M) that mixed with the nanostructures at different concentrations. Sunshine Raman spectrometer with a (50 x) objective lens was used to analyse the Raman spectra of Rh6G Sunshine Raman spectrometer with a (50 x) objective lens was used to analyse the Raman spectra of Rh6G dye using a porous silicon substrate (PSi) on which silver nanowires are deposited (PSi-AgNWs). Another porous silicon substrate (PSi) on which nanostructures are deposited that consisting of silver nanowires, coated with a polydopamine layer, and decorated with silver nanoparticles are deposited (PSi-AgNWs@PDA@AgNPs). The results showed that hot spots and roughness on the nanostructures' surfaces caused an increase in intensities of absorptances spectra and signals of SERS. After the effectual substrates were excited by a (λexc.=532nm) laser source, the enhancement factor (EF) of SERS signals of Rh6G (1 M) attained (26.3 ) and (28.7 ) of the characteristic peaks at wavenumber (1650 ) for PSi-AgNWs and PSi-AgNWs@PⱰA@AgNPs effectual substrates respectively. This study showed that nanostructure-coated porous silicon substrates have a repeatable and high signal frequency, stability in storage, cost-low technique, and ease of use. They allow researchers to recognise and analyse a wide range of molecules, including biomolecules, with detection limits ranging between milli- and femtomolar. These effectual substrates have a bright future as a bioanalytical tool using SERS spectroscopy.
      PubDate: Fri, 25 Feb 2022 10:04:34 PST
       
  • Preparation and Characteristics Study of Porous Silicon for Vacuum Sensor
           Application

    • Authors: Noor S. Dawood et al.
      Abstract: Vacuum is a technique that can be employed to measure pressures less than atmosphere (101325 mbar), the vacuum is too important in numerous fields of life. In the present research, the sensor of vacuum has been produced using a porous layer of silicon (Psi). N-type of silicon wafer (Si) has been used for formulating Psi samples utilizing photo-electrochemical etching (PECE) technique. The experimental work was carried out under different etching times (30, 60, and 90 min) while fixing the other parameters, including (24%) Hydrofluoric (HF) acid and (20 mA/cm2) current density. The pore width and depth and porosity % were confirmed using Scanning Electron Microscope (SEM) and Atomic Force Microscope (AFM) tests. The tests shown a sponge-like structure of Psi and the surface roughness increased along with etching time. X-ray diffraction (XRD) verified the formation of porous silicon, the crystal size reduced, and photoluminescence (PL) elucidated that the emission peaks centered at approximately (600-625 nm) corresponding to energy bandgap (1.72-1.94 eV). The electrical properties were investigated by the electrical resistance of porous silicon with vacuum. The results evinced that the porosity, pore depth, surface roughness and the intensity of Psi increased significantly as the etching time increased, and the vacuum value was sensed by varying the electrical resistance value of the Psi after removing the air molecules from the pores, thus the resistance gradually decreased after exceeding the vacuum value 10-3 mbar.
      PubDate: Fri, 25 Feb 2022 02:33:00 PST
       
  • Study of Pore Length and Chemical Composition of Charcoal that Results
           from the Pyrolysis of Coconut Shell in Bolaang Mongondow, Sulawesi,
           Indonesia

    • Authors: Meytij Jeanne Rampe et al.
      Abstract: Charcoal of coconut shell is produced by pyrolysis at 300oC and chemically activated using HCl. Both pyrolysis charcoal and chemical activation were measured and analyzed by Fourier Transform Infrared (FTIR), Scanning Electron Microscopy (SEM), and Energy Dispersive Spectroscopy (EDS). The functional groups found O-H, aliphatic C-H, aromatic C=C, C-O, and aromatic C-H. The distribution of pyrolysis charcoal pore length and chemical activation increased from 362 nm-1.02 µm to 1.10 µm-1.52 µm. The composition of carbon elements in the mass % of pyrolysis charcoal and chemical activation increased from 86.11% to 88.93%.
      PubDate: Mon, 21 Feb 2022 02:16:14 PST
       
  • In-vitro evaluation of high dosage of curcumin encapsulation in
           palm-oil-in-water, nanoemulsion stabilized with a sonochemical approach

    • Authors: Uday Dasharath Bagale PhD et al.
      Abstract: Curcumin is unstable under different environmental conditions. To increase the bioavailability and stability of curcumin, it is proposed in the present study to encapsulate it in palm oil-in-water nanoemulsions using ultrasound. The present work deals with maximum curcumin encapsulation into oil forms stable nanoemulsion using a food-grade surfactant and examines its antioxidant assay and in-vitro study. The synthesized curcumin nanoemulsion (CuNE) shows particle size in the range of 14.7 ± 3 nm, 95 ± 0.5% encapsulation efficiency, and provides stability against different environmental parameters. Furthermore, in-vitro analysis of high dosage CuNE shows more than 80-90% retention during simulated gastric and intestinal conditions.
      PubDate: Mon, 21 Feb 2022 02:16:09 PST
       
 
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