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  • 1
    In: Green Processing and Synthesis, Walter de Gruyter GmbH, Vol. 13, No. 1 ( 2024-02-13)
    Abstract: Herein, capsaicin nanoparticles (NPs) were prepared by two different methods, namely, evaporative precipitation of nanosuspension (EPN) and anti-solvent precipitation with a syringe pump (APSP). The nanoparticles of the necessary sizes were obtained after optimizing experimental parameters such as the solvent-to-anti-solvent ratio and stirring speed. They had spherical shapes and an average diameter of 171.29 ± 1.94 and 78.91 ± 0.54 nm when prepared using the EPN and APSP methods, respectively. Differential scanning calorimetry and an X-ray diffractometer showed that the capsaicin crystallinity decreased. FTIR results showed that the NPs were produced with their original configuration and did not result in the synthesis of any additional structures. The NP formulation had a desirable drug content. They surpassed the unprocessed drug in solubility and displayed the desired stability. Capsaicin NP cream showed many folds of enhanced analgesic, anti-inflammatory, and antimicrobial effects compared to unprocessed capsaicin.
    Type of Medium: Online Resource
    ISSN: 2191-9550
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2024
    detail.hit.zdb_id: 2645923-1
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  • 2
    In: Zeitschrift für Physikalische Chemie, Walter de Gruyter GmbH, Vol. 0, No. 0 ( 2023-10-05)
    Abstract: In this research work, cellulose was isolated from Dodonaea viscosa plant by means of various chemical processes followed by the preparation of nanocellulose through sulfuric acid hydrolysis. These chemical processes begin with the removal of non-cellulosic material such as lignin, pectin, crude wax, and hemicellulose followed by alkaline treatment and chlorine-free bleaching methods. Fourier transform infrared (FTIR) spectroscopy showed the successful isolation of cellulosic material after removing hemicellulose, lignin, and other extractives. Thermogravimetric analysis (TGA) elucidated the thermal degradation profile of the cellulose-based materials obtained after various chemical procedures at each step. Additionally, nanocellulose was prepared from cellulosic material using acid hydrolysis, and its structural and thermal properties were discussed. Nanocellulose extraction from the lignocellulosic biomass sources and its further utilization has been the subject of intensive research as the global community needs the use of green chemistry principles in recent life. Nanocellulosic material due to its unique characteristics and properties is of great importance and has many applications in various industries, including materials science and engineering.
    Type of Medium: Online Resource
    ISSN: 0942-9352 , 2196-7156
    RVK:
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2023
    detail.hit.zdb_id: 201103-7
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  • 3
    Online Resource
    Online Resource
    Walter de Gruyter GmbH ; 2023
    In:  Applied Computer Systems Vol. 28, No. 1 ( 2023-06-01), p. 148-155
    In: Applied Computer Systems, Walter de Gruyter GmbH, Vol. 28, No. 1 ( 2023-06-01), p. 148-155
    Abstract: The use of smartphones and their applications is expanding rapidly, thereby increasing the demand of computational power and other hardware resources of the smartphones. On the other hand, these small devices can have limited resources of computation power, battery backup, RAM memory, and storage space due to their small size. These devices need to reconcile resource hungry applications. This research focuses on solving issues of power and efficiency of smart devices by adapting intelligently to mobile usage by profiling the user intelligently. Our designed architecture makes a smartphone smarter by intelligently utilizing its resources to increase the battery life. Our developed application makes profiles of the applications usage at different time intervals. These stored usage profiles are utilized to make intelligent resource allocation for next time interval. We implemented and evaluated the profiling scheme for different brands of android smartphone. We implemented our approach with Naive Bayes and Decision Tree for performance and compared it with conventional approach. The results show that the proposed approach based on decision trees saves 31 % CPU and 60 % of RAM usage as compared to the conventional approach.
    Type of Medium: Online Resource
    ISSN: 2255-8691
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2023
    detail.hit.zdb_id: 2736346-6
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  • 4
    In: Zeitschrift für Physikalische Chemie, Walter de Gruyter GmbH, Vol. 234, No. 11-12 ( 2020-12-16), p. 1789-1802
    Abstract: Plant based materials are considered to have broad applications in the remediation of toxic materials. In this report, we present an environmental friendly and economic Cicer arietinum , named as (CP) supported for the synthesis of Ni nanoparticles (NPs) designated as Ni@CP. The in situ Ni@CP NPs were obtained using aqueous medium in the presence of sodium borohydride (NaBH 4 ) as a reducing agent. The prepared catalysts were applied for the hydrogenation/degradation of p -nitrophenol (PNP), o -nitrophenol (ONP), and 2,4-dinitrophenol (DNP), as well as congo red (CR), methyl orange (MO), methylene blue (MB) and rhodamine B (RB) dyes. The amount of total metal ions adsorbed onto the CP was evaluated by flame atomic absorption spectroscopy. The Ni@CP catalyst was characterized through PXRD, FTIR, FESEM and EDX analyses.
    Type of Medium: Online Resource
    ISSN: 2196-7156 , 0942-9352
    RVK:
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2020
    detail.hit.zdb_id: 201103-7
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  • 5
    Online Resource
    Online Resource
    Walter de Gruyter GmbH ; 2006
    In:  Journal of Optical Communications Vol. 27, No. 5 ( 2006-01)
    In: Journal of Optical Communications, Walter de Gruyter GmbH, Vol. 27, No. 5 ( 2006-01)
    Type of Medium: Online Resource
    ISSN: 2191-6322 , 0173-4911
    Language: Unknown
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2006
    detail.hit.zdb_id: 2430977-1
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  • 6
    In: Green Processing and Synthesis, Walter de Gruyter GmbH, Vol. 8, No. 1 ( 2019-01-28), p. 309-319
    Abstract: Plant-based materials are reported to have a wide range of applications in the environmental and biomedical sectors. In this report, we present an economic and environmentally friendly supported turmeric powder (TP) biomass for the support of Ag, Ni and Cu nanoparticles (NPs) designated as Ag@TP, Ni@TP and Cu@TP. The in situ syntheses of the stated NPs were achieved in aqueous medium using NaBH 4 as a reducing agent. The prepared NPs were applied for the degradation of o -nitrophenol (ONP), m -nitrophenol (MNP), p -nitrophenol (PNP), methyl orange (MO), Congo red (CR), rhodamine B (RB) and methylene blue (MB). Initially, Ag@TP, Ni@TP and Cu@TP were screened for the MO dye and antibacterial activity, where Ag@TP displayed the strongest catalytic activity for MO and bactericidal activities as compared to Ni@TP and Cu@TP. The quantity of metal ions adsorbed onto the TP was investigated by atomic absorption spectroscopy. The Ag@TP, Ni@TP and Cu@TP were characterized through X-ray diffraction (XRD), attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy, thermal gravimetric analysis (TGA), energy-dispersive X-ray spectroscopy (EDS) and field emission scanning electron microscope (FESEM) analysis.
    Type of Medium: Online Resource
    ISSN: 2191-9550
    Language: Unknown
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2019
    detail.hit.zdb_id: 2645923-1
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  • 7
    Online Resource
    Online Resource
    Walter de Gruyter GmbH ; 2019
    In:  Green Processing and Synthesis Vol. 8, No. 1 ( 2019-01-28), p. 118-127
    In: Green Processing and Synthesis, Walter de Gruyter GmbH, Vol. 8, No. 1 ( 2019-01-28), p. 118-127
    Abstract: The aim of the presented work was to assess the potential of Medicago polymorpha extract to synthesize silver nanoparticles (AgNPs) as a green method. It was a simple one-step synthesis approach and the product obtained was characterized by UV-visible spectroscopy, Fourier transform infrared (FTIR), powder X-ray diffraction, thermogravimetric analysis, and field-emission scanning electron microscopy (FE-SEM). At room temperature, the optimum time for the completion of the reaction (i.e. the formation colloidal solution) was just 5 min. FE-SEM images showed that AgNPs were predominantly in spheres, whereas FTIR spectrum analysis inferred that gallic acid present in the extract initially reduced silver ions to elemental silver. The carboxylic and hydroxyl groups of biomolecules present in the extract stabilized AgNPs by passivating the surface to prevent aggregation, resulting in uniform distribution. The antibacterial activity of synthesized AgNPs showed effective inhibitory effects against waterborne pathogens, including Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ), at a minimum inhibitory concentration of 10 μg/ml. Membrane permeability and respiration studies were also performed to assess the surface role of the synthesized AgNPs. The prepared AgNPs exhibited excellent antioxidant activity and catalytic reduction of methyl orange with a rate constant of 6.8×10 −3 s −1 .
    Type of Medium: Online Resource
    ISSN: 2191-9550
    Language: Unknown
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2019
    detail.hit.zdb_id: 2645923-1
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  • 8
    Online Resource
    Online Resource
    Walter de Gruyter GmbH ; 2018
    In:  Architecture, Civil Engineering, Environment Vol. 11, No. 1 ( 2018-01-01), p. 73-80
    In: Architecture, Civil Engineering, Environment, Walter de Gruyter GmbH, Vol. 11, No. 1 ( 2018-01-01), p. 73-80
    Abstract: This research work mainly focuses on improving the concrete strength based on fiber reinforcement both in compression and tension. Concrete with various mix proportions containing dosage of Polypropylene (PP) fiber of lengths ranging from 13 to 25 mm with coarse aggregate replacement levels at 10%, 20%, and 30% by dismantled road aggregate were made and the compressive and tensile strengths were investigated. The experimental test results revealed high compressive and tensile strength at curing period of 28 and 56 days. The specimens tested observed that due to addition of fiber, the fibers could hold the matrix together even after extensive cracking and crushing. Net result of all these is to impart to the fiber composite pronounced post-cracking ductility which is absent in traditional concrete. In order to provide base for comparison, concrete specimens as a reference were cast without the addition of polypropylene fiber. Test result revealed that by adding polypropylene fibers at 6grams per one kg of cement a considerable improvement in the strength of concrete of 37.68 MPa and 43.59 MPa at 28 and 56 days respectively with 10% coarse aggregate replacement by recycled aggregate is achieved. Streszczenie W artykule przedstawiono badania, których celem było zwiększenie wytrzymałości betonu na ściskanie i rozciąganie przed dodatek zbrojenia rozproszonego w postaci włókien polipropylenowych. W badaniach wytrzymałości na ściskanie i rozciąganie próbek betonowych stosowano różnorodne mieszanki betonowe z dodatkiem włókien polipropylenowych (PP) o długościach od 13 do 25 mm i z dodatkiem kruszywa wtórnego pochodzącego z rozbiórki nawierzchni drogowych zastępującego kruszywo grube w ilościach: 10%, 20% i 30%. W badaniach, po 28. i 56. dniach twardnienia betonu, uzyskano wysoką wytrzymałość na ściskanie i rozciąganie. Dzięki dodatkowi włókien zaobserwowano, że matryca cementowa jest utrzymana nawet wówczas, gdy ma miejsce intensywne zarysowanie i zmiażdżenie próbki. W badaniach stwierdzono zatem ciągliwość po zarysowaniu kompozytu betonowego zbrojonego włóknami, której pozbawiony jest tradycyjny beton. Do badań porównawczych, wykonano próbki betonowe bez dodatku włókien polipropylenowych. W badaniach porównawczych, dzięki dodatkowi włókien polipropylenowych w ilości 6 g/kg cementu uzyskano znaczną poprawę wytrzymałości betonu – o 37.68 MPa i 43.59 MPa, odpowiednio po 28. i 56. dniach i przy 10% zastąpieniu kruszywa grubego kruszywem drogowym, z recyklingu.
    Type of Medium: Online Resource
    ISSN: 1899-0142
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2018
    detail.hit.zdb_id: 3001149-8
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  • 9
    Online Resource
    Online Resource
    Walter de Gruyter GmbH ; 2020
    In:  Journal of Applied Geodesy Vol. 14, No. 1 ( 2020-01-28), p. 77-81
    In: Journal of Applied Geodesy, Walter de Gruyter GmbH, Vol. 14, No. 1 ( 2020-01-28), p. 77-81
    Abstract: Global Navigation Satellite System (GNSS) and remote sensing Digital Elevation Models (DEMs) represent earth’s surface elevation with reference to ellipsoid and orthometric heights. Proper estimation of the geoid (difference of ellipsoid and orthometric heights) is necessary before comparing data referenced to the different vertical datum. In this paper, an error in estimating EGM96 orthometric height is highlighted, verified by NGA/NASA developed model and MATLAB®. A significant error was found in the ArcGIS derived EGM96 orthometric heights range between ±6.9 meters. In addition, interpolation of low-resolution geoid data also produces significant biases depending on geographic location and the number of the interpolation data point. The bias was maximum negative in the central part of Tibetan Plateau and Himalaya. Therefore, estimation of orthometric height similar to NGA/NASA model precision is necessary for comparison of DEMs for natural resources management, 3D modelling and glaciers mass balance mainly in the mountainous regions.
    Type of Medium: Online Resource
    ISSN: 1862-9024 , 1862-9016
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2020
    detail.hit.zdb_id: 2248811-X
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  • 10
    Online Resource
    Online Resource
    Walter de Gruyter GmbH ; 2020
    In:  Open Computer Science Vol. 10, No. 1 ( 2020-07-01), p. 175-193
    In: Open Computer Science, Walter de Gruyter GmbH, Vol. 10, No. 1 ( 2020-07-01), p. 175-193
    Abstract: The day-to-day use of digital devices with Internet access, such as tablets and smartphones, has increased exponentially in recent years and this has had a consequent effect on the usage of the Internet and social media networks. When using social networks, people share personal data that is broadcast between users, which provides useful information for organizations. This means that characterizing users through their social media activity is an emerging research area in the field of Natural Language Processing (NLP) and this paper will present a review of how personality can be detected using online content. Approach A systematic literature review identified 30 papers published between 2007 and 2019, while particular inclusion and exclusion criteria were used to select the most relevant articles. Outcomes This review describes a variety of challenges and trends, as well as providing ideas for the direction of future research. In addition, personality trait identification and techniques were classified into different types, including deep learning, machine learning (ML) and semi-supervised/hybrid. Implications This paper’s outcomes will not only facilitate insight into the various personality types and models but will also provide knowledge about the relevant detection techniques. Novelty While prior studies have conducted literature reviews in the personality trait detection field, the systematic literature review in this paper provides specific answers to the proposed research questions. This is novel to this field as this particular type of study has not been conducted before.
    Type of Medium: Online Resource
    ISSN: 2299-1093
    Language: Unknown
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2020
    detail.hit.zdb_id: 2816007-1
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