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    Tytuł:
    Determination of kinetic parameters of decomposition of tetrahydropyrimidine derivatives
    Autorzy:
    Bhesaniya, K.
    Patel, A.
    Baluja, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/411745.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    tetrahydropyrimidine derivative
    TGA
    DSC
    kinetic parameter
    Opis:
    Some new tetrahydropyrimidine derivatives have been synthesized and their structural determination was done by IR, NMR and mass spectral data. Thermal analysis of these synthesized dihydropyrimidinthiones has been carried out by TGA and DSC techniques. From the thermograms, various kinetic parameters such as order of degradation (n), energy of activation (E), frequency factor (A) and entropy change (ΔS) have been evaluated. Further, thermal stability of tetrahydropyrimidine have been determined which is found to depend on the type of substituent present in the compounds.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 13; 23-32
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sustain release Formulation and Evaluation of Ofloxacin floating delivery system
    Autorzy:
    Patel, A. J.
    Naik, D. R.
    Raval, J. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/412207.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    ofloxacin
    ethyl cellulose
    xanthum gum
    floating drug delivery System
    controlled release
    Opis:
    Floating tablets has been accepted as a process to achieve controlled drug delivery by prolonging the residence time of the dosage form at the site of absorption, thereby improving and enhancing the bioavailability of drug. The objective of present study outlines the development and characterization the floating drug delivery system of Ofloxacin to enhance its bioavailability and therapeutic efficacy, using different grades of polymer along with effervescent agent sodium bicarbonate and citric acid. Ofloxacin is a synthetic chemotherapeutic second-generation antibiotic of the fluoroquinolone class. Different tablet formulations were formulated by wet granulation technique and were evaluated for physical parameters like Tablet Thickness, Hardness, % Friability, Weight variation, Content uniformity, In vitro buoyancy, Swelling index, In vitro dissolution study and drug release mechanisms. As the concentration of the polymer in the formulations increased the release of drug decreased. Hence it was considered as suitable candidate for formulation as floating drug delivery system. Different kinetic models were applied to drug release data in order to evaluate release mechanisms and kinetics. The optimized formula F4 showed better sustained drug release with good floating properties and fitted best to be Korsmeyer-Peppas model with R2 value of 0.9575. As the n value for the Korsmeyer- Peppas model was found be more than 0.5 it follows Non-Fickian diffusion mechanism. FTIR result showed that there is no drug excipients interaction.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 12; 69-83
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microgrid-based cryogenic energy storage as a part of Intelligent Energy Infrastructure Management (IEIM)
    Autorzy:
    Głowacki, B.A.
    Tomov, R.
    Woźniak, M.
    Patel, A.
    Pałka, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1372731.pdf
    Data publikacji:
    2011
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
    Tematy:
    maszyna elektryczna
    energia odnawialna
    zarządzanie energią
    electric machine
    renewable energy
    energy management
    Opis:
    Integration of advanced electrical machines with electrical power systems and renewable energy is at the heart of the dedicated Liquid Hydrogen Laboratory (LHL) at the University of Cambridge. Generation, storage and use of the hydrogen in conjunction with a patented dynamic energy storage system are an integral part of the proposed combined heat and power (CHP) IEIM Project. The aim of the project is to address intelligent energy infrastructure management IEIM of a smart micro grid, which combines hydrogen and electricity. To build a powerful relational database for the entire physical infrastructure based on combined heat and power elements, a sub-system needs to be established to monitor the status of interconnectivity to the grid. This information will be mapped onto the database to provide a real-time view of the energy network's physical interconnectivity with the grid, significantly reducing the environmental impact of the total electricity supply system. Considering the nature of the heat and power elements fibre optic based sensing techniques will remotely monitor the patching fields and provide an accurate map of the connectivity and constantly monitor changes in real-time.
    Źródło:
    Maszyny Elektryczne: zeszyty problemowe; 2011, 4, 92; 13-16
    0239-3646
    2084-5618
    Pojawia się w:
    Maszyny Elektryczne: zeszyty problemowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficient Calculation of Low Energy Configurations of Nanoparticle Ensembles for Magnetoresistive Sensor Devices by Means of Stochastic Spin Dynamicsand Monte Carlo Methods
    Autorzy:
    Teich, L.
    Schröder, C.
    Müller, C.
    Patel, A.
    Meyer, J.
    Hütten, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1385684.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.40.Mg
    75.75.Jn
    75.78.-n
    Opis:
    We present results of Monte Carlo and stochastic spin dynamics simulations of a magnetic nanoparticle model system based on experimentally produced samples. Thermodynamic investigations as well as spin dynamics studies show characteristic features, both resembling magnetic dipole glass behaviour. While spin dynamics studies at T=0 yield a multitude of low energy configurations, thermodynamic simulations show a clear transition between a paramagnetic and a frozen magnetic state. Moreover, we demonstrate the application of experimentally inspired demagnetization protocols to compute low energy configurations of the systems under consideration efficiently.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 374-376
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mitral regurgitation after anthracycline exposure: a case report
    Autorzy:
    Hartlage, Gregory R.
    Cole, Palmer H.
    Patel, Aarti A.
    Morales, C. Alberto
    Harrison, Eric E.
    Powiązania:
    https://bibliotekanauki.pl/articles/773456.pdf
    Data publikacji:
    2014
    Wydawca:
    Medical Education
    Tematy:
    anthracycline
    cardiomyopathy
    cardiotoxicity
    mitral regurgitation
    mitral valve repair
    Opis:
    We report the case of a 66-year-old African American female with a history of breast cancer previously treated with anthracycline based chemotherapy presenting with significant mitral regurgitation. She initially had preserved left ventricular systolic function with normal cardiac chamber dimensions, however, she developed progressive left ventricular chamber dilation and mild reduction in systolic function, which prompted surgical correction of her mitral regurgitation. After surgical mitral valve repair, she developed overt left ventricular failure with severe systolic dysfunction; however, she responded well to subsequent medical therapy.
    Źródło:
    OncoReview; 2014, 4, 4; A144-A147
    2450-6125
    Pojawia się w:
    OncoReview
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Functional appliances: The activator and the functional regulator- A review
    Autorzy:
    Kishnani, R.
    Uppal, S.
    Patel, G.
    Acharya, A.
    Metha, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1916521.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    Activator
    functional regulator
    myofunctional appliances
    Opis:
    In this review of literature we are discussing the effects of functional appliances on the dentofacial structures in the treatment of Class II malocclusions. Despite recent questions on the effectiveness of early treatment, it is generally recognized that the use of growth modification still has a place in modern orthodontic practices. The aim of this review is to study growth modification of the mandible by two appliances: the activator and the functional regulator. Mechanism of action, design, effect on dentofacial structures, etc. of activator and the functional regulators are discussed here. Regardless of the appliance used, there are a large amount of variations in individual patient response to treatment. A second stage of treatment with a fixed appliance is necessary in most cases to ensure proper alignment and interdigitation of the dentition. Regardless of the appliance used, the success of treatment is dependent on patient cooperation.
    Źródło:
    Progress in Health Sciences; 2014, 4, 2; 150-156
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On Phonon Dispersion in Alkali Metals
    Autorzy:
    Gajjar, P. N.
    Thakore, B. Y.
    Patel, H. K.
    Jani, A. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1933617.pdf
    Data publikacji:
    1995-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.25.Cx
    63.20.Dj
    Opis:
    In the present paper, the calculation of the phonon dispersion relations for alkali metals to second order in a local pseudopotential is discussed in terms of the real-space sum. Different forms of dielectric functions are employed to judge the varying effects of exchange and correlation on the phonon frequencies. The quantitative agreement of phonon frequencies for the alkali metals reflects, satisfactorily, the experimental trend.
    Źródło:
    Acta Physica Polonica A; 1995, 88, 3; 489-502
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geomorphic Control on Soil Erosion – a Case Study in the Subarnarekha Basin, India
    Autorzy:
    Kathwas, Amar Kumar
    Patel, Nilanchal
    Powiązania:
    https://bibliotekanauki.pl/articles/2088182.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
    Tematy:
    geomorphological feature
    soil erosion
    USLE
    principal component analysis
    Opis:
    Geomorphology depicts the qualitative and quantitative characteristics of both terrain and landscape features combined with the processes responsible for its evolution. Soil erosion by water involves processes, which removes soil particles and organic matter from the upper sheet of the soil surface, and then transports the eroded material to distant location under the action of water. Very few studies have been conducted on the nature and dynamics of soil erosion in the different geomorphologic features. In the present investigation, an attempt has been made to assess the control of geomorphologic features on the soil loss. Universal Soil Loss Equation (USLE) was used to determine soil loss from the various geomorphological landforms. Principal component analysis (PCA) was implemented on the USLE parameters to determine the degree of association between the individual principal components and the USLE-derived soil loss. Results obtained from the investigation signify the influence of the various landforms on soil erosion. PC5 is found to be significantly correlated with the USLE-derived soil loss. The results ascertained significant association between the soil loss and geomorphological landforms, and therefore, suitable strategies can be implemented to alleviate soil loss in the individual landforms.
    Źródło:
    Polish Journal of Soil Science; 2021, 54, 1; 1-24
    0079-2985
    Pojawia się w:
    Polish Journal of Soil Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Maximizing power output of a partially shaded total-cross-tied photovoltaic array
    Autorzy:
    Shah, N. S.
    Patel, H. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/136262.pdf
    Data publikacji:
    2017
    Wydawca:
    EEEIC International Barbara Leonowicz Szabłowska
    Tematy:
    current compensation
    voltage equalization
    MPPT
    partial shading
    TCT configuration
    Opis:
    Non-uniform conditions on the modules of the PV array, especially, partial shading reduces the output of the PV array to a large extent. The shaded module in a string limits the current of the entire string and hence, the output power of the string. The output power under such conditions is reported to be higher for total-cross-tied (TCT) configuration. This paper describes two different approaches, one based on current compensation (current equalization) and another based on voltage equalization, to extract higher power from the partially shaded total-cross-tied photovoltaic array. The TCT configuration is considered to minimize the number of converters, sensors, cost and complexity involved. The additional converters in the two distinct approaches evaluated here operate only when the partial shading occurs and are controlled to minimize the current and voltage miss-matches. The analysis and the control algorithm are presented. Simulation results obtained in MATLAB/Simulink are included to demonstrate the effectiveness of both methods and the relative merits and demerits of these approaches are highlighted.
    Źródło:
    Transactions on Environment and Electrical Engineering; 2017, 2, 1; 10-18
    2450-5730
    Pojawia się w:
    Transactions on Environment and Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mesogenic Dependence of Chalconyl Schiff’s Bases on Molecular Rigidity and Flexibility
    Autorzy:
    Pandya, S. H.
    Patel, V. R.
    Doshi, A. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1178290.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Enantiotropy
    Liquid Crystals
    Mesomorphism
    Nematic
    Smetic
    Opis:
    A novel homologous series R0-C6H4.CH:N-C6H4.CO.CH:CH-C6H4-OC6H13(n) of liquid crystal property is synthesized and studied with a view to understand and establish the effect of molecular structure on liquid crystal properties with respect to Schiff base and chalconyl central bridges as well as changing left n-alkoxy terminal and right n-hexyloxy fixed tail ended group. Homologous series consisted of eleven (C1 to C16) homologues in which the nematogenic mesomorphism commences from C3 homologue and continued to last C16 homologue without exhibition of smectogenic property. Rest of the C1 and C2 homologues are nonmesomorphic, whose Latent transition temperature (LTT) are predicted by extrapolation of N-I transition curves. Odd-even effect is observed for N-I transition curve. N-I transition curve and Cr-N/I transition curve behaved in normal manner. The Nematic thermal stability is 72.2 ° C. The minimum and maximum nematogenic mesophaselengths are ranging between 12.0 °C and 30.0 °C at C16 and C14 homologue respectively. Transition temperatures were determined by an optical polarizing microscopy (POM), equipped with a heating stage. Thermal analytical and spectral data confirms the molecular structures of homologues. The novel homologous series of chalconyl Schiff’s base is low melting series, whose mesogenic transition temperatures ranges between 43.0 °C and 79.0 °C.
    Źródło:
    World Scientific News; 2017, 86, 3; 242-252
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recurrent upper gastrointestinal bleed in a 26 year old female
    Autorzy:
    Heavener, T.
    Patel, P.
    Garner, J.
    Sing, J.
    Jeffries, M.
    Thomas, H.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1918636.pdf
    Data publikacji:
    2018-06-21
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    Anemia
    coil migration
    endoscopy
    Opis:
    According to recent society guidelines, upper gastrointestinal bleed initial approach includes assessment of hemodynamic status, fluid resuscitation if necessary, transfusion strategy to target hemoglobin above 7 (g/dL), use of intravenous proton pump inhibitor and generally upper endoscopy within 24 hours. We present a case of a 26-year-old woman who sought treatment after one episode of hematemesis and pre-syncope. She had a similar presentation three months earlier and received interventional radiology-guided mesenteric angiography and the use of multiple coils to embolize a 1.5-cm deep punched-out duodenal ulcer. Migration of the coil was noted on endoscopy within the previously described ulcer. Coil migration is expected to occur in up to 3% of cases of endovascular embolization. However, migration into the duodenum is uncommon and could have actually been a contributing factor to the current bleed.
    Źródło:
    Progress in Health Sciences; 2018, 8(1); 231-233
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Is Social Software a New Mode of Second-Language Learning in the Information Age?
    Autorzy:
    PATEL, H. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/628099.pdf
    Data publikacji:
    2013
    Wydawca:
    Fundacja Pro Scientia Publica
    Tematy:
    social learning, social media, information age, information technologies, education, internet, pedagogy
    Opis:
    The basic characteristics of social media mirror much of the rhetoric and thinking aro-und educational reform in the modern world context. The basic cultural relevance of social media to young people enables them to learn how to bring their social life into the matrix of school activities. It also provides young learners with different audiences for different activities. Today, social media are probably the critical component in enabling individuals, both teachers and learners, to construct their own personal learning networks. Joining, building, growing and managing digital communities, whether relatively open or relatively closed, enables teachers and learners to connect with others with similar interests and to learn from other participants in those communities.
    Źródło:
    Journal of Education Culture and Society; 2013, 4, 2; 116-123
    2081-1640
    Pojawia się w:
    Journal of Education Culture and Society
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, characterization and analytical applications of chelating resin containing orcinol
    Autorzy:
    Shah, B. A.
    Shah, A. V.
    Patel, N. B
    Shah, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/779773.pdf
    Data publikacji:
    2012
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    separacja analityczna
    żywice chelatujące
    kopolimery
    wymiana
    analytical separation
    chelating resin
    column operation
    copolymer
    exchange capacity
    Opis:
    A chelating resin based on Salicylic acid-Formaldehyde copolymer, containing Orcinol (SFO), has been synthesized and characterized on the basis of Elemental Analysis, Particle Size Distribution, FT-IR Analysis, XRD, SEM and Optical Photographs. The Physico-Chemical properties have been studied. This resin is highly stable in acidic and alkaline solutions and has been studied as a chelating sorbent for heavy metal ions and transition metal ions. The Exchange capacity order is Ni(II) > Cu(II) > Zn(II) > Cd(II) > Pb(II). The effect of nature and concentration of different electrolytes on distribution coefficient (Kd) for metal ions have been investigated. Separation of synthetic mixtures containing Cu(II)-Pb(II), Ni(II)-Cd(II) and Brass constituents has been carried out using a column prepared from the synthesized chelating resin. The developed procedure was also tested for the removal of Cd(II) and Pb(II) from natural water of Purna River near by Navsari, Gujarat, India. Keywords
    Źródło:
    Polish Journal of Chemical Technology; 2012, 14, 2; 88-96
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nematogenic Mesophase Induced from Two Nonmesomorphs and Determination of LTT for Common Nonmesomorphic Component by Extrapolation
    Autorzy:
    Solanki, Ravindra
    Patel, R. B.
    Doshi, A. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1179586.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Binary System
    Eutectic point
    Mixed melt
    Mixed mesomorphism
    Nematic
    Opis:
    Three binary systems (A+B1, A+B2, A+B3) consisted of both admixed components as nonmesomorphs induces mesomorphic property as nematogenic mesophase within definite range of concentration of component - A. The Isotropic- Nematic (I-N) transition curves of each binary systems are extra polated to 100 mole percent of nonmesomorphic component –A to determine its reliable latent transition temperature (LTT) and to derive the group efficiency order. The common component A is a Schiff’s base, P-tolal. P’- Phenetidine (109 °C), uncommon component B1 and B2 are also Schiff’s bases p-Chloro benzal P’- chloroaniline (M.P 111.0 °C) and p-Anisal p’-Toluidine (M.P 92.0 °C) respectively, whereas, component B3 is a chalcone α- 4 methoxy phenyl β 4’-pentyloxy benzoyl ethylene (M.P 91.0 °C). The reliable predicted LTT of common component –A are 99.5 °C, 99.0 °C and 101.0 °C from binary systems A+B1 ,A+B2 and, A+B3 respectively. The group efficiency order derived is B2>B1>B3 from range of mesomorphism.The melting point of common and uncommon nonmesomorphic components are confirmed with previously reported values. Suitable magnitudes of anisotropic forces of intermolecular attractions as a consequence of resulted molecular rigidity and flexibility through respective polarity and polarizabilities of nonmesogenic components of the mesogenic mixitures which play an important role in inducing mesomorphism.
    Źródło:
    World Scientific News; 2017, 74; 68-79
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Environmentally and Economically Feasibility Manufacturing Process of Potassium Nitrate for Small Scale Industries: A Review
    Autorzy:
    Joshi, C. S.
    Shukla, M. R.
    Patel, K.
    Joshi, J. S.
    Sahu, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/411997.pdf
    Data publikacji:
    2015
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Chemical
    discharge
    ions
    Salts
    Waste
    Opis:
    Potassium Nitrate (PN) is of the basic need of chemical industry. With increase of demand in different production section of fertilizer, pharmaceutical, explosive, food industry etc, potassium nitrate the production becoming non economical to industry. The operating conditions and parameters are the main factors, which responsible for maximised the profits. The main aim of this study is to compared the production potassium nitrate in profitable as well as environmentally suitability way. From the literature different manufacturing process has been summarized for concluding this study.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2015, 41; 88-99
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bioremediation of melanoidin contamination in distillery effluent using Aspergillus brasiliensis
    Autorzy:
    Singh, T.A.
    Singh, T.
    Singh, R.
    Pandey, P.K.
    Gaur, R.
    Jamal, F.
    Patel, S.K.
    Bansal, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2097092.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    spent wash
    effluent
    melanoidin
    bioremediation
    decolorization
    Opis:
    The current investigation is the first report of utilization of Aspergillus brasiliensis for the decolorization of melanoidin in distillery effluent. The effluent generated from alcohol distilleries is one of the most complex wastewater with a high biological oxygen demand (BOD) and other organic, inorganic, and toxic constituents. The effluent contains melanoidin, a dark brown compound, which is difficult to remediate by using conventional technologies. The disposal of spent wash in the natural environment is hazardous and can deteriorate land and water resources. The decolorization of spent wash through physical and chemical methods remains unsuitable, and the only alternative to decolorize spent wash is biological treatment. In the current study, three fungal strains were isolated from the distillery waste and screened for their ability to decolorize melanoidin.The isolate RS2 exhibited maximum decolorization of 83% and was identified as Aspergillus brasiliensis. Its optimum growth temperature was 37EC, and the maximum efficiency was recorded after 120 h of incubation. Nutritional sources were investigated for the fungi showing the maximum decolorization of melanoidin, and starch and peptone were found to be the best carbon and nitrogen sources, respectively. At 1.5% starch concentration and 1.5% peptone concentration, the decolorization level attained was 87.45% and 88.74%, respectively. A. brasiliensis exhibited a high potential to decolorize melanoidin. The decolorization percentage was high, which makes this fungus a potential candidate for use at the industrial scale for the bioremediation of spent wash.
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2020, 101, 3; 205-213
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of different wire materials on WEDM performance of Bio-compatible material
    Autorzy:
    Pandey, Gaurav Kumar
    Patel, Praveen Bhai
    Kumar, Abhishek
    Niranjan, Ramendra Singh
    Katiyar, Vikas
    Chandra, A. K
    Powiązania:
    https://bibliotekanauki.pl/articles/23966616.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    WEDM
    MRR
    SR
    Ti-6Al-4V
    Opis:
    The present experimental investigation aims to analyse the effect of various machining parameters, such as pulse peak current (Ion), pulse on time (Ton), pulse off time (Toff) and spark voltage (SV) on the surface roughness (SR) and material removal rate(MRR) by using continuous traveling of both wire electrode (i.e. brass wire and zinc-coated brass wire). The present work also analyses the effect of types of wires, such as brass wire and zinc-coated brass wire used during machining of Titanium alloy (Ti-6Al-4V) on Surface roughness (SR) and material removal rate (MRR). This work studies the correlation between various response parameter such SR and MRR by using same machining parameter by for both wires.
    Źródło:
    Production Engineering Archives; 2022, 28, 1; 50--55
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A convergent approach for the synthesis of new pyrazolyl bipyridinyl substituted coumarin derivatives as antimicrobials
    Autorzy:
    Bhila, V. G.
    Chovatiya, Y. L.
    Patel, C. V.
    Giri, R. R.
    Brahmbhatt, D. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/411982.pdf
    Data publikacji:
    2015
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Coumarin
    Bipyridine
    Pyrazole
    Kröhnke’s reaction
    antimicrobial activity
    Opis:
    Some new 3-[3-(1-phenyl-3-aryl-1H-pyrazol-4-yl)acryloyl]coumarins 3a-f were synthesized (coumarin chalcones) by the condensation of various 3-acetyl coumarins 1 and appropriate 1-phenyl-3-aryl-1H-pyrazole-4-carbaldehyde 2. These coumarin chalcones 3a-f were then employed for the synthesis of pyrazolyl bipyridinyl substituted coumarins 7a-f, 8a-f, and 9a-f under Krohnke’s reaction condition. The characterization of all the synthesized compounds was carried out by elemental analysis, IR, 1H-NMR, 13C-NMR, DEPT-135 and mass spectral analysis. In addition to that, in vitro antimicrobial competency of the title compounds was assessed against selected pathogens. Compounds 3b, 3e, 7b, 8b, 8c and 9b exhibited excellent antimicrobial activity and said to be the most proficient members of the series.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2015, 40; 1-16
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Facies characterisation of a shallow-water deltaic succession: the Upper Jurassic Wagad Sandstone Formation of Kachchh, western India
    Autorzy:
    Joseph, J. K.
    Patel, S. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/94430.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    Lithofacies
    Oxfordian/Kimmeridgian
    offshore
    shallow-water delta
    South Wagad Fault
    litofacja
    oksford
    kimeryd
    delta
    Opis:
    Ancient deltaic facies are difficult to differentiate from tidally influenced shallow-marine facies. The Wagad Sandstone Formation of the Wagad Highland (eastern Kachchh Basin) is typified by offshore and deltaic facies with sedimentary characteristics that represent different conditions of hydrodynamics and related depositional processes. The study area, the Adhoi Anticline, constitutes a ~154-m-thick, shale-dominated sequence with progressive upward intercalations of bioturbated micritic sandstone and quartz arenite. Two thick Astarte beds (sandy allochemic limestone), with an erosional base and gravel blanketing, illustrate tidal amplification and high-energy stochastic events such as storms. Sedimentological characteristics document three depositional facies: an offshore, shale-dominated sequence prograding to proximal prodeltaic micritic sandstone and quartz arenite with sandy allochemic limestones, further prograding to mouth bars and abandoned channel deposits. The Wagad Sandstone Formation displays depositional environmental conditions that are dissimilar from those of coeval deposits in Kachchh sub-basins as well as on regional and global scales. This is attributed to a reactivation of the Kachchh Mainland and South Wagad faults which resulted in detachment and uplift of the Wagad block which then experienced prograding deltaic conditions.
    Źródło:
    Geologos; 2018, 24, 2; 137-150
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study on the Influence of Reinforcement Volume on AA5083/(SiC-Gr) Hybrid Surface Composite Developed by Friction Stir Processing
    Autorzy:
    Bharti, Shalok
    Ghetiya, Nilesh D.
    Patel, Kaushik M.
    Saxena, Kuldeep K.
    Powiązania:
    https://bibliotekanauki.pl/articles/27765096.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    surface composites
    multi-pass
    Friction Stir Processing
    reinforcement
    hybrid composite
    Opis:
    In this study, a hybrid surface composite of AA5083/SiC-Gr was produced by Friction Stir Processing (FSP). Reinforcement material each in 50:50 proportion was filled in the base matrix using holes method. Three different hybrid reinforcement volumes of 301.6 mm3, 452.4 mm3, and 603.2 mm3 were prepared for surface composite. Optical and Scanning Electron Microscopy was used to check the quality of the prepared surface composite and homogeneous distribution of reinforcement was observed in the images. It was observed that due to better uniform distribution of reinforcement particles during 3 pass FSP, specimens with 301.6 mm3 reinforcement volume showed enhanced microhardness and wear properties in comparison with the other specimens.
    Źródło:
    Archives of Metallurgy and Materials; 2023, 68, 2; 625--629
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling and Optimization of Phenol Formaldehyde Resin Sand Mould System
    Autorzy:
    Chate, G. R.
    Patel, M. G. C.
    Parappagoudar, M. B.
    Deshpande, A. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/381857.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mould hardness
    phenol-formaldehyde resin
    permeability
    desirability function approach
    design of experiments
    masy formierskie
    żywica fenolowo-formaldehydowa
    przepuszczalność
    twardość
    optymalizacja
    Opis:
    Chemical bonded resin sand mould system has high dimensional accuracy, surface finish and sand mould properties compared to green sand mould system. The mould cavity prepared under chemical bonded sand mould system must produce sufficient permeability and hardness to withstand sand drop while pouring molten metal through ladle. The demand for improved values of permeability and mould hardness depends on systematic study and analysis of influencing variables namely grain fineness number, setting time, percent of resin and hardener. Try-error experiment methods and analysis were considered impractical in actual foundry practice due to the associated cost. Experimental matrices of central composite design allow conducting minimum experiments that provide complete insight of the process. Statistical significance of influencing variables and their interaction were determined to control the process. Analysis of variance (ANOVA) test was conducted to validate the model statistically. Mathematical equation was derived separately for mould hardness and permeability, which are expressed as a non-linear function of input variables based on the collected experimental input-output data. The developed model prediction accuracy for practical usefulness was tested with 10 random experimental conditions. The decision variables for higher mould hardness and permeability were determined using desirability function approach. The prediction results were found to be consistent with experimental values.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 2; 162-170
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Free Vibration Analysis of A357 Alloy Reinforced with Dual Particle Size Silicon Carbide Metal Matrix Composite Plates Using Finite Element Method
    Autorzy:
    Lakshmikanthan, A.
    Mahesh, V.
    Prabhu, R. T.
    Patel, M. G. C.
    Bontha, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837831.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    finite element method
    shear deformation theory
    FSDT
    A357 alloy
    Hamilton’s principle
    A357/DPS-SiC
    composites
    metoda elementów skończonych
    teoria odkształceń
    stop A357
    zasada Hamiltona
    kompozyty
    Opis:
    In this work, the free vibration behaviour of A357 composite plate reinforced with dual particle size (DPS) (3 wt.% coarse + 3 wt.% fine, 4 wt.% coarse + 2 wt.% fine, and 2 wt.% coarse + 4 wt.% fine) SiC is evaluated using the finite element method. To this end, first-order shear deformation theory (FSDT) has been used. The equations of motion have been derived using Hamilton’s principle and the solution has been obtained through condensation technique. A thorough parametric study was conducted to understand the effect of reinforcement size and weight fraction, boundary conditions, aspect ratio and length-to-width ratio of plate geometry on natural frequencies of A357/DPS-SiC composite plates. Results reveal significant influence of all the above variables on natural frequency of the composite plates. In all the cases, A357 composite plate reinforced with 4 wt.% coarse and 2 wt.% fine SiC particles displayed the highest natural frequency owing to its higher elastic and rigidity modulus. Further, the natural frequencies increase with decrease in aspect ratio of the plate geometry. Natural frequency also decreases with increase in the number of free edges. Lastly, increasing the length-to-width ratio drastically improves the natural frequency of the plates.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 101-112
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of a Jeffery-Hamel flow between two rectangular inclined smooth walls using the differential Transform Method
    Autorzy:
    Patel, N. D.
    Meher, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/122393.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    Differential Transform Method
    Jeffery-Hamel flow
    higher order non-linear ordinary differential equation
    metoda transformacji różnicowej
    DTM
    przepływ Jeffery-Hamela
    nieliniowe równanie różniczkowe
    Opis:
    In this article, the Differential Transform Method (DTM) is applied to derive a semi-analytic solution for the non-linear MHD (Magneto Hydro Dynamics) Jeffery-Hamel flow between rectangular inclined smooth planes. A non-linear ordinary differential equation of order four is obtained from Navier-Stokes equations using similar transformation. A comparison between DTM, PM (Perturbation Method) and numerical solution is shown here to validate the obtained results with its convergence analysis for different values of m and a Reynolds number in divergent channels.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2018, 17, 4; 47-57
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A study on magneto hydrodynamics Jeffery-Hamel flow with heat transfer problem in Eyring-Powell fluid using differential transform method
    Autorzy:
    Meher, Ramakanta
    Patel, N. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/122591.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    Differential Transform Method
    Jeffery-Hamel flow
    Eyring-Powell fluid
    heat transfer
    metoda transformacji różnicowej
    przepływ Jeffery-Hamela
    przenikanie ciepła
    płyn Eyringa-Powella
    Opis:
    In this paper, we study and analyse the variations of velocity profiles for different values of the Reynolds number, Eckert number, Prandtl number and Hartmann number in the Magneto Hydrodynamics Jeffery-Hamel flow with heat transfer in Eyring-Powell fluid in both divergent and convergent channels. The Differential Transform Method (DTM) is used to obtain an analytical solution of the Jeffery Hamel flow problem and to determine the velocity profiles of the fluid flow. Finally, the efficiency of DTM has been shown, and the results have been validated by comparing the obtained results with the numerical results (fourth order RK method) in both convergent and divergent channels.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2019, 18, 3; 57-68
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-technical complications predict 30-day perioperative mortality in abdominal surgery. A propensity score matched analysis
    Powikłania nietechniczne prognozują 30-dniową śmiertelność okołooperacyjną w chirurgii jamy brzusznej. Analiza dopasowania tendencji
    Autorzy:
    Vasavada, Bhavin B.
    Patel, Hardik
    Powiązania:
    https://bibliotekanauki.pl/articles/1623542.pdf
    Data publikacji:
    2020
    Wydawca:
    Krakowska Akademia im. Andrzeja Frycza Modrzewskiego
    Tematy:
    mortality
    hepatobiliary surgery
    surgical critical care
    complication
    śmiertelność
    chirurgia wątrobowo-żółciowa
    chirurgiczna opieka krytyczna
    komplikacje
    Opis:
    Introduction: Surgical complications are a major cause of mortality and morbidity. Non-technical complications seem to be more dangerous than technique-related complications, however they are commonly neglected by surgeons. Aim: To study the relationship between non-technical complications and mortality after gastrointestinal and hepatobiliary surgery. Material and Methods: All gastrointestinal and hepatobiliary procedures performed over 3 years in one center were analysed. Non-technical postoperative complications were defined as perioperative complications related to patients’ physiological health or comorbidities, rather than surgical procedures or techniques. To avoid selection bias we conducted a 1:1 propensity score match analysis with non-technical complications as a dependent factor. The propensity scores were calculated using logistic regression. Preoperative confounding factors such as age, sex, American Society of Anesthesiologists (ASA) score and type of surgery were entered into our model as covariates. We used the nearest-neighbor protocol with a caliber of 0.2. The cases were not reusable after matching. The statistics were analyzed using SPSS version 23. Results: A total of 348 patients underwent gastrointestinal and HPB (Hepato Pancreatico Biliary) surgery in Hepatobiliary and Liver Transplant Department of Shalby Hospitals, India between April 2017 and March 2020. Twenty-four patients developed non-technical complications. ASA scores independently predicted non-technical complications (p=0.001, odds ratio 3.955, 95% C.I.: 1.774–8.813). After matching with 23 controls, non-technical complications were still significantly correlated with mortality (p<0.0001). Intraoperative factors did not predict non-technical complications. Surgery-related complications were not associated with mortality after matching. Conclusion: Non-technical complications are associated with a significant risk of mortality.
    Wprowadzenie: Powikłania chirurgiczne są główną przyczyną śmiertelności i zachorowalności. Powikłania pozatechniczne wydają się być bardziej niebezpieczne niż powikłania techniczne, jednak chirurdzy często je zaniedbują. Celem pracy było zbadanie związku między powikłaniami niezwiązanymi z techniką chirurgiczną a śmiertelnością po rozległych zabiegach operacyjnych w obrębie przewodu pokarmowego, wątroby i dróg żółciowych. Materiał i metody: Przeprowadzono analizę danych wszystkich chorych leczonych w Hepatobiliary and Liver Transplant Department of Shalby Hospitals w Indiach w okresie 3 lat z powodu schorzeń przewodu pokarmowego, wątroby i dróg żółciowych. Powikłania nietechniczne zostały zdefiniowane jako wszystkie powikłania związane ze stanem ogólnym i chorobami współistniejącymi, niemające związku z samą techniką chirurgiczną. Aby zmniejszyć ryzyko błędu wynikającego z doboru chorych, przeprowadzono dodatkowo analizę porównawczą z odpowiednio dobraną pod kątem wszystkich innych cech grupą chorych, u których takie powikłania nie wystąpiły. W analizie wykorzystano regresję logistyczną. Przedoperacyjne czynniki, takie jak: wiek, płeć, wynik w skali Amerykańskiego Towarzystwa Anestezjologów (ASA) i rodzaj operacji, zostały wprowadzone do naszego modelu jako zmienne zaburzające. Użyto protokołu najbliższego sąsiada o kalibrze 0,2. Przypadki nie były wykorzystywane ponownie po dopasowaniu. Statystyki przeanalizowano za pomocą programu SPSS w wersji 23. Wyniki: Ogółem operowanych było 348 chorych w okresie od kwietnia 2017 r. do marca 2020 r. U 24 chorych rozwinęły się powikłania niechirurgiczne. Wystąpienie tych powikłań było związane z wyższym wynikiem oceny przedoperacyjnej w skali ASA (p=0,001, OR 3,955, 95% CI: 1,774–8,813). W analizie grup porównawczych stwierdzono wyższe ryzyko zgonu (p<0,0001) w grupie chorych z powikłaniami niechirurgicznymi. Powikłania techniczne związane z zabiegiem operacyjnym nie wpłynęły na zwiększenie ryzyka zgonu. Wniosek: Powikłania niechirurgiczne u chorych operowanych w obrębie przewodu pokarmowego, wątroby i dróg żółciowych wiążą się ze zwiększeniem ryzyka zgonu.
    Źródło:
    Państwo i Społeczeństwo; 2020, 4; 37-47
    1643-8299
    2451-0858
    Pojawia się w:
    Państwo i Społeczeństwo
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and Characterization of N-Methyl Indole Derivatives via Desulfitative Displacement by Various Amines and Its Antimicrobial Activity
    Autorzy:
    Chodvadiya, Vijay D.
    Pambhar, Kaushik D.
    Parmar, Nilesh D.
    Dhamsaniya, Ashish P.
    Safi, Shahrukh khan A.
    Chhatbar, Pratiksha V.
    Ram, Hemal N.
    Khunt, Ranjan C.
    Patel, P. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1065130.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Anti-microbial agents
    Desulfitative displacement
    N-methyl indole
    S-methyl
    Opis:
    A modular three step synthetic approach of N-methyl indole derivatives has been carried out by the condensation of N-methyl indole with cyanoacetic acid using acetic anhydride as solvent to yield 3-cyanoacetyl N-methyl indole, which further reacts with carbon disulphide and methyl iodide in basic condition to obtain 2-(1-methyl-1H-indole-3-carbonyl)-3,3-bis(methylthio)acrylonitrile as a scaffold. Subsequent, the scaffold when reacts with substituted various amine derivatives via desulfitative displacement forms new derivatives of 3-((substitutedphenyl)amino)-2-(1-methyl-1H-indole-3-carbonyl)-3-(methylthio)acrylonitrile in moderate to good yields. All the novel compounds were evaluated for their antimicrobial activity against Gram+ve and Gram-ve bacteria and different fungal species which demonstrated well to moderate antimicrobial activity.
    Źródło:
    World Scientific News; 2019, 120, 2; 181-191
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Association of hand grip strength with psychological stress, exercise habits and body composition amongst medical students: a cross-sectional study
    Autorzy:
    Barre, Samira
    Inyingi, Laura
    Orrego Castellanos, Julianna
    Patel, Agastya
    Ruckemann-Dziurdzinska, Katarzyna A.
    Bryl, Ewa D.
    Witkowski, Jacek M.
    Powiązania:
    https://bibliotekanauki.pl/articles/33897312.pdf
    Data publikacji:
    2024-06-18
    Wydawca:
    Gdański Uniwersytet Medyczny
    Tematy:
    exercise
    psychological stress
    medical students
    Hand grip strength
    Opis:
    Background The aim of this study was to assess the effectiveness of hand grip strength (HGS) test in identifying highly stressed individuals and to examine the effect of exercise and lifestyle on HGS and stress measures. Material and methods It is cross-sectional study. Students of the Medical University of Gdańsk, Poland were asked to fill out a questionnaire, undergo body composition analysis, perform HGS test and provide a saliva sample for cortisol measurement. Results Self-rated stress (SRS) was significantly higher in pre-clinical years (PCY) compared to clinical years (CY). HGS was significantly lower in PCY males than CY males. Participants who performed some form of exercise had significantly higher HGS compared with those who did not exercise. A positive correlation between HGS and BMI was noted. Students with low HGS were found to have lower levels of salivary cortisol (SC). However, there was no significant difference in SC levels between PCY and CY students. Conclusions HGS may be a reliable method of identifying stressed individuals and promoting healthy lifestyle behaviors. HGS testing is a safe, cheap and easy to perform method for a large number of participants while being time economical.
    Źródło:
    European Journal of Translational and Clinical Medicine; 2024, 7, 1; 33-46
    2657-3148
    2657-3156
    Pojawia się w:
    European Journal of Translational and Clinical Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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