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Tytuł:
Experimental investigation of recast layer formation on the surface of Ti-6Al-4V titanium alloy during EDM process (machining carried out at lower range of machining parameters)
Badania wpływu parametrów procesu cięcia elektroerozyjnego na warstwę przetopioną stopu Ti-6Al-4V (przy zastosowaniu małych wartości wyładowań elektrycznych)
Autorzy:
Thesiya, D.
Patel, S.
Powiązania:
https://bibliotekanauki.pl/articles/175849.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
EDM
Ti6Al4V titanium alloy
SEM
recast layer
stop tytanu Ti-6Al-4V
warstwa przetopiona
Opis:
The recast layer forms during the machining of Ti-6Al-4V titanium alloy carried out with a use of electrical discharge machining (EDM). The paper presents the description of EDM process carried out at lower range of machining parameters also the formation process of recast layer. The recast layer was analyzed using scanning electron microscopy and 3D viewer image. The performed experiments involved application of copper and graphite electrode with positive polarity. In order to analyze the results, the authors used design of experiment (DOE) method – Taguchi technique (L18) with mixedlevel design. The influence of peak current (A), servo voltage (V), pulse on time (Ton) and pulse off time (Toff) on the recast layer was described in the article.
W artykule przedstawiono wyniki badań mikrostruktury warstwy przetopionej stopu tytanu Ti-6Al-4V w wyniku cięcia elektroerozyjnego (EDM), w zakresie małych wartości wyładowań elektrycznych z zastosowaniem miedzianej i grafitowej elektrody spolaryzowanej dodatnio. Dokonano analizy badań mikroskopowych przeprowadzonych z użyciem skaningowego mikroskopu elektronowego SEM, stosując zaawansowaną metodę DOE (ang. DOE – Design Of Experiments) wyznaczania wpływu zmiennych wejściowych na wynik analizowanego procesu. Wyznaczono wpływ parametrów prądowych – napięcia, czasu włączenia i wyłączenia układu na jakość warstwy przetopionej stopu tytanu.
Źródło:
Advances in Manufacturing Science and Technology; 2014, 38, 4; 53-59
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sedimentological and palaeoecological significance of the trace fossils of the Jurassic rocks of the Jhura Dome, Mainland Kachchh, western India
Autorzy:
Patel, S. J.
Patel, N. J.
Powiązania:
https://bibliotekanauki.pl/articles/2077327.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Jurassic
ichnoassemblages
ichnoguilds
ichnofacies
depositional environment
Kachchh
India
jura
skamieniałość śladowa
Indie
Opis:
The Middle to Late Jurassic succession of the Jhura Dome (Jhurio and Jumara formations) of the Mainland Kachchh, western India, comprises a ~500 m thick succession of clastic carbonates and mixed siliciclastic-carbonates, intercalated with shales. The sequence, as based on sedimentological characteristics, exhibits six sedimentary facies and four subfacies. Certain exceptional bands of the ripplemarked calcareous sandstone, shale and oolitic limestone facies are rich in ammonites, belemnites, brachiopods and bivalves. Thirty four ichnogenera were also identified and analysed paleoecologically. These trace fossils represent five ethological categories and six ichnoassemblages. Seventeen ichnoguilds are demonstrated based on space utilization for characterising the ecological complexity of ichnoassemblages. Bathymetric control of the trace fossils resulted with development of Skolithos, Cruziana and Zoophycos ichnofacies type conditions. The sedimentological and ichnological data analysis revealed seven distinctive depositional regimes ranging from offshore shelf below storm wave base to middle shoreface.
Źródło:
Volumina Jurassica; 2015, 13, 2; 101--139
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ichnology of mixed siliciclastic-carbonate sedimentary cycles and their sequence stratigraphic context: Kaladongar Formation (Middle Jurassic) of Kachchh, western India
Autorzy:
Joseph, J. K.
Patel, S. J.
Powiązania:
https://bibliotekanauki.pl/articles/2077326.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
sequence stratigraphy
mixed siliciclastic-carbonates
ichnology
Kachchh Basin
western India
stratygrafia sekwencji
ichnologia
Kachchh
Indie
Opis:
The Middle Jurassic Kaladongar Formation, Patcham Island, Kachchh, western India, comprises of a 353 m-thick mixed siliciclastic-carbonate succession of asymmetrical shallowing and deepening upward sedimentary cycles. It is subdivided into five main facies i.e., micritic sandstone, allochemic sandstone, sandy allochem limestone, micritic mudrock, and sandy micrite along with shales and conglomerates. Eight trace fossil assemblages comprising 34 ichnogenera are defined, including the Asterosoma, Gyrochorte, Rhizocorallium, Thalassinoides, Planolites–Palaeophycus, Phycodes, Ophiomorpha, and Skolithos assemblages that reflect five depositional facies: offshore, transitional, lower, middle, and upper shoreface. The sedimentary packages and associated trace fossil assemblages are separated by various discontinuities, stratigraphic surfaces and stratigraphic boundaries within the succession of the Kaladongar Formation and reveal three phases of regression (RST-I, RST-II and RST-III) and three phases of transgression (TST-II, III and IV) within the 3rd order systems tracts developed in the slowly transgressing sea during the Bajocian-Bathonian time interval.
Źródło:
Volumina Jurassica; 2015, 13, 2; 81--99
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Palaeoecologic significance of the Callovian-Oxfordian trace fossils of Gangeshwar Dome, Southeast of Bhuj, Mainland Kachchh, India
Autorzy:
Bhatt, N. Y.
Patel, S. J.
Powiązania:
https://bibliotekanauki.pl/articles/2060982.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
trace fossils
Gangeshwar Dome
Mainland Kachchh
India
Late-Middle Jurassic
ichnocoenoses
skamieniałości śladowe
Indie
Opis:
The shallow marine deposits of the Late-Middle Jurassic (Callovian–Oxfordian) Jumara Formation of the Gangeshwar Dome of Mainland Kachchh, India, comprise a succession of ~247 m thick clastic sediments with few non-clastic bands and contain a diverse group of ichnofauna. The succession is subdivided into seven lithofacies, viz., laminated shale-siltstone facies (LSS), sheet sandstone facies (SS), herringbone sandstone facies (HS), bivalve sandstone facies (BS), bioclastic limestone facies (BL), intraformational conglomerate facies (IC) and oolitic limestone facies (OL). The ichnofaunal study shows 29 ichnospecies of 23 ichnogenera including Arenicolites, Bifungites, Bolonia, Chondrites, Didymaulichnus, Diplocraterion, Gyrochorte, Helminthopsis, Isopodichnus, Laevicyclus, Lockeia, Monocraterion, Taenidium, Ophiomorpha, Palaeophycus, Planolites, Phycodes, Protopalaeodictyon, Rhizocorallium, Skolithos, Thalassinoides, Tisoa, and Zoophycos. These trace fossils are distributed among nine ichnocoenose, characterized by Chondrites, Diplocraterion, Gyrochorte, Ophiomorpha, Rhizocorallium, Skolithos, Taenidium, Thalassinoides and Zoophycos. Their occurrence in the facies corresponds to their trophic and ethological properties. The colonisation of the opportunistic Diplocraterion and the Skolithos ichnocoenose shows a high den¬sity and marks foreshore/nearshore environmental conditions. The Gyrochorte, the Rhizocorallium, the Taenidium and the Thalassinoides ichnocoenose indicate the typically lower energy zone of the shoreface-offshore region. The Chondrites ichnocoenosis indicates fluctuation in bottom water oxygen while the Zoophycos ichnocoenosis typically exploited a calm water niche in the offshore region. These ich-nocoenose recur throughout the sequence and belong to the Skolithos and the Cruziana ichnofacies which marked changes in energy gradient, substrate stability, water depth and mode of life of invertebrate organisms. The study of trace fossil assemblages with sediment characteristics gives a detailed and accurate picture of foreshore to offshore palaeoenvironmental conditions.
Źródło:
Volumina Jurassica; 2017, 15, 1; 17--40
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
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:
Anti-solvent sonocrystallisation of lactose
Autorzy:
Patel, S.R.
Murthy, Z.V.P.
Powiązania:
https://bibliotekanauki.pl/articles/185611.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
n-propanol
odzyskiwanie laktozy
antyrozpuszczalnik
lactose recovery
anti-solvent
sonocrystallisation
Opis:
The present work deals with ultrasound assisted crystallisation of lactose from lactose solution. The crystallisation of lactose was completed rapidly by applying the ultrasound waves in the presence of an anti-solvent (n-propanol), at the room temperature (30š3°C). The yield of lactose was found to be more than 85% (w/w) in 4 minutes of sonication. The spread of the crystal size distribution was found to decrease with increase in sonication time.
Źródło:
Chemical and Process Engineering; 2011, 32, 4; 379-389
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis, characterization, and antimicrobial activity of heterocyclic azo dye derivatives
Autorzy:
Patel, Pinka
Patel, Pankaj S.
Powiązania:
https://bibliotekanauki.pl/articles/1178086.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Schiff bases
UV absorber
antimicrobial-screening
heterocyclic dyes
Opis:
The novel mordent and disperse heterocyclic dyes were prepared by coupling of various diazo solution of aromatic amines with N-{4-[2-{3,5-bis(4-methoxyphenyl)-4,5-dihydro-pyrazol-1-yl}-2-oxoethoxy]phenyl}-1-(phenyldiazenyl)methanimine The resultant mordent and disperse heterocyclic dyes were characterized by elemental analyses, IR and NMR spectral studies. The UV-visible spectral data have also been discussed in terms of structural property relationship. All the disperse azo dyes were applied on polyester textile fibers. The percentage dye bath exhaustion and fixation on the polyester fibers have been found to be very good. Moderate to very good light fastness and washing fastness properties were indicated by the dyed fabrics. Structures of synthesized compounds were confirmed by physical and spectral analysis. The compounds are evaluated for their antimicrobial activities.
Źródło:
World Scientific News; 2018, 95; 265-272
2392-2192
Pojawia się w:
World Scientific News
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:
Two Step One-Pot Synthesis of Novel 5-(4-Fluorophenyl)-1H-Beno[e][1,4]Diazepin-2(3H)-One and it’s Base Catalyzed Transformation to N-Alkyl and C-3 Arylidene Derivatives
Autorzy:
Patel, Anil S.
Khunt, H. R.
Ghelani, S. M.
Babariya, J. S.
Vilapara, K. V.
Naliapara, Y. T.
Powiązania:
https://bibliotekanauki.pl/articles/412124.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
benzodiazepines
base catalyzed
cross-aldol
Opis:
We have demonstrated two step one-pot synthesis of novel 5-(4-Fluorophenyl)-1H-Beno[e][1,4]Diazepin-2(3H)-one using 2-Amino-4’-fluorobenzophenone as initial stating material. The small library of N-alkylation and C-3 benzylidene derivatives have been synthesized by base catalyzedreaction of 5-(4-fluorophenyl)-1H-benzo[e][1,4]diazepin-2(3H)-one (3) nucleus with various alkyl halides and aromatic aldehydes respectively.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 11, 2; 106-115
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
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:
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:
Synthesis and in vitro antimicrobial evaluation of some new chalcones containing vinyl ester group and substituted alkyl chain
Autorzy:
Sharma, Vinay S.
Patel, R. B.
Powiązania:
https://bibliotekanauki.pl/articles/1191249.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Antibacterial
Antifungal
Chalcone
Vinyl ester
Opis:
A novel series of chalconyl vinyl ester based derivatives were designed and synthesized. The newly synthesized compounds were studied for efficacy against several bacteria (E.Coli, P.Aeruginosa, S.Aureus, S.Pyogenus) and fungi (C.Albicans, A.Niger, Clavatus) using the broth dilution technique. Chalcones were prepared by treatment of 4-iodo acetophenone with 4-hydroxy benzaldehyde by Claisen-Schimidt condensation reaction. Various chalconyl vinyl ester derivatives (C1-C8) were prepared by reaction of chalcone with 4-n-alkoxy cinnamic acids derivatives. Compound C8 shows the best bioactive desired antibacterial analogue with less MIC value against different tested strains. All the final synthesized compounds were characterized by IR, 1H NMR, and elemental analysis.
Źródło:
World Scientific News; 2016, 54; 240-251
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical properties of fresh mahua
Autorzy:
Patel, M.
Pradhan, R.
Naik, S.
Powiązania:
https://bibliotekanauki.pl/articles/24590.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
density
flower
fresh mahua
Madhuca indica
mahua
mass
moisture content
physical property
surface area
Madhuca latifolia zob.Madhuca indica
Sapotaceae
tree
fruit
edible fruit
edible flower
Źródło:
International Agrophysics; 2011, 25, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
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