bluuebunny/crossref_metadata_2025 huggingface dataset:
Synchronization in coupled integer and fractional-order gauss map
Authors: Pakhare Sumit S , Rahangadale Khushbu , Gade Prashant M
Published: June 2021

Nonlinear maps are often used to model dynamical systems in engineering and sciences. In some cases, the entire memory dictates the time evolution of the system. Fractional-order maps have been proposed to model such situations. In a spatially extended system, different parts of the system may respond to memory differently. We propose a mixed order system where one variable has a fractional-order evolution while the other variable has integer-order evolution. It models an inhomogeneous system where certain variables retain memory while certain others do not. It is also relevant to control problems where fractional or integer-order control may be useful for achieving the desired state. In two coupled gauss maps, we consider unidirectional as well as bidirectional coupling. Bifurcation diagram of the system has been studied for various values of fractional-order parameter α. In particular, we study synchronization in these systems.
On properties of non-markovian random walk in one dimension
Authors: Warambhe Manoj C. , Gade Prashant M.
Published: June 2021

We study a strongly Non-Markovian variant of random walk in which the probability of visiting a given site i is a function f of number of previous visits v(i) to the site. If the probability is inversely proportional to number of visits to the site, say f(i)=1/(v(i)+1)α the probability distribution of visited sites tends to be flat for α>0 compared to simple random walk. For f(i)=exp(-v(i)), we observe a distribution with two peaks. The origin is no longer the most probable site. The probability is maximum at site k(t) which increases in time. For f(i)=exp(-v(i)) and for α>0 the properties do not change as the walk ages. However, for α<0, the properties are similar to simple random walk asymptotically. We study lattice covering time for these functions. The lattice covering time scales as Nz, with z=2, for α ≤ 0, z>2 for a >0 and z<2 for f(i)=exp(-v(i)).
Study of positional isomerism in N-propyl and Iso-propyl alcohol using ultrasonic technique
Authors: Thete Rupali , Sharma Satish , Rajagopalan S
Published: June 2021

In the present work, positional Isomerism is studied in the binary mixtures of n-propyl alcohol and Iso-propyl alcohol in nitrobenzene as the common solvent. Ultrasonic velocity and attenuation measurements using pulse–echo technique operated at 10 MHz have been taken at various concentrations of both alcohols in nitrobenzene, from 283.15K - 293.15K. It is observed that both the systems exhibit critical nature and show non-linear variation both in ultrasonic velocity of propagation and attenuation. Ultrasonic attenuation at lower concentrations of n-propyl alcohol in nitrobenzene reveals the dominant structural relaxation as compared to that of Iso-propyl alcohol in nitrobenzene.
Synthesis and structural analysis of trivalent europium (Eu3+) ions doped oxyfluoride (ZnBiNaPSr) glasses as prominent host materials for optical devices
Authors: Raju D Siva , Bindu S Hima , Krishna J Suresh , Krishna V Vinay , Raju Ch Linga
Published: June 2021

A series of trivalent europium (Eu3+) ions doped zinc sodium strontium activated bismuth phosphate (P2O5-Bi2O3-Na2CO3-SrCO3-ZnF2-Eu2O3) glasses of different dopant ion compositions have been prepared by conventional melt quenching technique. Physical and optical parameters of the prepared glasses such as density (ρ), molecular weight (Mi), molar volume (VM), rare-earth ion concentration (NRE), polaron radius (rp), inter nuclear distance (ri) field strength (F), oxygen to phosphorus (O/P) ratio, refractive index (n), dielectric constant (ϵ), reflection losses (R), molar refractivity (RM), electron polarizability (αM), susceptibility (χ) oxygen packing density (OPD), metallization (M) and reflection factor (P) have been evaluated using the standard formulae. The amorphous/glassy nature was confirmed by the XRD pattern showing the broad hump cantered at 2θ=28° Surface morphological studies have been carried out using SEM analysis and EDS spectra reveal the successful incorporation of Eu3+ ions into the host matrix. Structural information was obtained from FT-IR spectra, recorded in 4000-400 cm−1 spectral region which consists of symmetrical, asymmetrical stretching and bending P=O, P-O-P, O-P-O and P-O-H vibrations along with OH- groups. Furthermore, all the prepared glasses were subjected to study for their optical and luminescence properties in detailed.
Study of strontium doped Nd2FeO4+δ cathode material for intermediate temperature solid oxide fuel cells application
Authors: Punde J D , Chaudhari V N
Published: June 2021

The series of Nd2–x
Sr
x
FeO4+δ (x = 0.1 - 0.4) single phase compound is prepared with crystallite size in submicron range using combustion synthesis technique. The agglomeration of the submicron sized crystallites resulted into formation of porous electrode layer is realized from scanning electron microscopy. The dcconductivity results showed maximum σ for x = 0.2, which also exhibited minimum activation energy. The comparative low dc conductivity with literature reports is due to high porosity as obtained from agglomerated submicron crystallites. Variation in conductivity in Nd2–x
Sr
x
FeO4+δ is Sr-dependent and understood f rom defect chemistry. The complex impedance plots of the symmetric cell showed decrease in the real axis intercept with increased temperature in turn reduced area specific resistance (ASR). Nd1.8Sr0.2FeO4+δ cathode exhibits lowest ASR (= 1.92±0.015 Ohm cm2) at 973 K. The oxygen partial pressure dependent ASR indicated that the charge transfer at electrode-electrolyte interface is the rate limiting factor while oxygen reduction reaction (ORR).
Rare Earth (RE) doped color tunable phosphors for white light emitting diodes
Authors: Khan Saniya , Parauha Yatish R , Halwar Dharma K , Dhoble Sanjay J
Published: June 2021

Currently, white light-emitting diodes (WLEDs) are emerging lighting techniques and are highly desirable. These are one of the world’s highest lighting technologies. LEDs have attracted special attention of research society, scholars and society through their benefits and applications. Phosphor-converting light-emitting diodes (PC-LEDs) show immense potential for the future and, in the coming years, it is expected that LEDs will be easily available at a cheaper price with lower energy consumption. Rare earth activated phosphors are an integral and important part of white light generation. In this review, we have studied numerous research papers about phosphor-converted light-emitting diodes (pc-LED). The main objective of this review paper is to analyze inorganic materials that have been synthesized by various methods and are suitable for eco-friendly lighting applications. In this review, we propose the plan and discovery of new LED phosphors from two alternate points of view, i.e., basic crystal structure in various host systems and co-doped activators through energy transfer. The color-tunable properties of rare-earth activated phosphors explain in detail. Numerous color-tunable phosphor materials have been studied and discussed in this review. In addition, utilizations, difficulties and development or improvement of pc-WLEDs will be discussed.
Influence of Europium & Europium complex Eu (TTA)3phen on luminescence properties of electro spun polymer nanofibers.
Authors: Itankar S G , dandekar M P , Rewatkar S S
Published: June 2021

The europium ion (Eu3+) is well acknowledged and more popular for its strong luminescence when it is compared with other RE ions. Here we report the comparative study of electrospun polymer nanofibers by using europium and europium complex Eu(TTA)3phen by electrospinning technique. Electrospun fibers of Europium chloride and Europium complex Eu(TTA)3phen were prepared by using polymer PVDF to study the photoluminescence properties. Photoluminescence spectra of these electrospun nanofibers show very high intense red emission because of the strong hypersensitive behaviour of the 5D0 → 7F2 transition. These electrospun nanofibers are very much useful in the latest technology of Smart Textiles, for developing protective fabrics with thermal comfort. These fabrics also used to defend from wide variety of environmental hazards. This paper highlights the promising applications of electrospinning for developing protective fabrics and also shows the potential application in various polymer optoelectronic devices.
Wavelength down-conversion study of Ba3Y1-X (BO3)3: x Tb3+& Eu3+ [0.005 ≤ X ≤ 0.05] phosphor for solid state lighting applications
Authors: Hargunani S P , Chavan R M , Sonekar R P , Dhoble N S
Published: June 2021

In this work, we synthesized the Tb3+ and Eu3+ doped α-Ba3Y(BO3)3 phosphor using the solution combustion method. Using the powder XRD pattern and FTIR low-temperature phase of α-Ba3Y1-X(BO3): xTb3+& Eu3+ was confirmed. Element composition with percentage was verified by FE-SEM-EDS. Stoke’s shift values were calculated which confirms the high thermal stability of the phosphor& its use in high power WLED. Photoluminescence study at room temperature was done. Intrinsic absorption due to the 4f-4f transition of Eu3+ results intense red emission from α-Ba3Y1-X(BO3): xEu3+ makes it suitable for pc-WLED and confirms the Centro-inversion symmetry site of Eu3+ in the host. Green emission at NUV excitation from Ba3Y1-X(BO3): xTb3+ results from cross-relaxation of Tb3+ in a host. The concentration quenching reason for both activators was investigated by calculating and comparing critical distance. The purity of luminescence color was confirmed by plotting CIE-chromaticity co-ordinates on CIE-Color gamut. The entire work confirms the importance of synthesized phosphor along with previously reported same host materials. The reported phosphor may be suitable for NUV converted WLED, wavelength conversion devices, and high power RGB –WLED.
Inorganic thermoluminescent phosphors in radiation dosimetry: An overview
Authors: Satkar Rashmi C , Kadam Abhijeet R , Ovhal Digambar A , Dhoble S J
Published: June 2021

Thermoluminescence (TL) materials display a wide scope of uses in various zones, for example, personnel dosimetry, natural dosimetry, medical research and so forth Doping of various rare earth impurities in various hosts is liable for changing the properties of materials valuable for different applications in various fields. These materials can be lighted by various kinds of bars, for example, γ-rays, X-rays, electrons, neutrons and so on. Different radiation systems, just as their portion reaction range, assume a significant function in thermoluminescence dosimetry. In the proposed article, initially we momentarily illustrate several delegate families of TLD phosphors. Secondly, we suggest the plan system focused on revelation of novel phosphors with center around the crystal structural deliberation. Finally, we overlook the results of other researcher on the current progresses in innovation and structural design of TLD phosphors that demonstrate the accepted approaches, together with ((1) investigation of emerging phosphors from the auxiliary models, (2) preparation of new emerging phosphor materials of crystalline properties by doping and (3) basic change of the known phosphors. The crystalline properties of new emerging phosphor shows interest in crystal chemistry analysis for the development of new thermoluminescent dosimetric phosphors with the different properties like co-substitution and single particle analytical advances are also described in this literature.
Photoluminescence properties of wet-chemically synthesized Tb3+ and Sm3+doped K3Ca2(SO4)3Cl phosphor
Authors: Baig Nahida , Mahakhode J G , Kumari Puja , Parauha Yatish R , Dhoble N S , Dhoble Samikha B.
Published: June 2021

In this study, we are successfully synthesized terbium and samarium (Tb3+/Sm3+) doped K3Ca2(SO4)3Cl phosphors by wet chemical method, and synthesized phosphors were characterized by XRD, SEM, and Photoluminescence (PL) techniques, and studied in detail. Photoluminescence analysis, we can see that under the Near-UV (NUV) excitation of 380nm, the Tb3+ activated samples showed a prominent green emission peak at 546nm attributed to the 5D4→7F5 transition of Tb3+ions. While the PL emission spectra of 404 nm light excited K3Ca2(SO4)3Cl:Sm3+phosphorshowedthree emission lines at 565nm, 598nm and 645nm attributed to 4G5/2→6H5/2,
4G5/2→6H7/2, and4G5/2→6H9/2 transitions of Sm3+ ions, respectively. The CIE coordinates were calculated to be (0.263, 0.515) for K3Ca2(SO4)3Cl:Tb3+and (0.532, 0.462) for K3Ca2(SO4)3Cl: 1.5mol%Sm3+, which liedin the green and orange regions, respectively. The entire photoluminescence results indicated that phosphor K3Ca2(SO4)3Cl doped with Tb3+ and Sm 3+may turn out to be an important component of pc-white LEDs and display devices.
A review on morphological studies of phosphors by combustion route synthesis: The role of fuels
Authors: Pise Ashish D , Kadam Abhijeet R , Sahare Sakshi , Dhoble S J
Published: June 2021

There are several methods are developed for the synthesis of phosphor materials with different advantages like short reaction time and crystal lattice parameters. Solution combustion synthesis is one of the novel method for the synthesis of phosphor materials. In past few years, Solution combustion method has been used to develop novel nanostructured phosphor materials although there is special attention has been given to the morphological studies of the luminescent phosphors. Different kinds of fuels were employed for the synthesis of luminescent phosphor using fues like triethylamine, analine, urea, citric acid and hydrazine. This review focuses on the recent work on the phosphors prepared by solution combustion using different types of fuels.
FTIR spectral analysis of glycine doped ammonium dihydrogen phosphate (ADP) crystal
Authors: Khan A Z , Khan Z S , Patle S , Rewatkar K G , Zodape S
Published: June 2021

Ammonium Dihydrogen Phosphate crystals doped with Glycine (GADP) has been grown by slow evaporation method, Rotation method and Sankaranarayanan - Ramasamy (SR) methods with different molar concentration. The Fourier Transform Infra-Red (FTIR) studies have been investigated on the as grown GADP crystals. The FTIR spectrum shows the interaction between ADP and the dopant by the additional peaks which corresponds to the functional groups of Glycine. The standard spectrum statistics of FTIR confirms the presence of all the functional groups. The spectrum for ADP crystals doped with Glycine grown by Rotation and SR methods have similar peaks with slight variation as that of conventional slow evaporation method grown Glycine doped ADP crystals.
Recent development of Eu3+-doped phosphor for white LED application: A review
Authors: Lakde Jayashree , Mehare Chaitali M , Pandey Krishna Kumar , Dhoble N S , Dhoble S J
Published: June 2021

The phosphor converted w-LEDs gaincrucial attention in solid state lighting (SSL) for generation of illumination owing to their numerous meritorious advantages such as superior life time, excellent efficiency, compactness, reliability and power saving consumption as well as environmental friendly. The quality of w-LEDs in lighting and display is influence by host phosphorand the choice of activator. So greatlyattemptwere dedicated to developed inventiveuni-nucleiluminescent phosphor materials compose of chromatic stability, optimum CRI and low correlated color temperature. This review elaborate theintroduction ofEu3+rare earth activated red emitting phosphor assigned to 5D0→7FJ (J= 1,2,3,4) energy levelsand its fundamental merit for w-LEDs. This article represent the analyseofcombination of different types of Eu3+ activated luminescent materials by traditional and novel methods and its impact on photoluminescence for SSL.
Enhancement of photoluminescence emission of Gd3+ activated borate phosphors for phototherapy lamps: A review
Authors: Lanje M M , Yawalkar M M , Dahegaonkar J S , Dhoble S J
Published: June 2021

In this review paper, we discuss about photoluminescence emission of Gd3+ in various inorganic phosphors. Narrow band UVB (NB-UVB) emission of Gd 3+ in 312-315 nm is well sought after in medical field to treat photo-responsive diseases like atopic dermatitis, vitiligo, psoriasis, etc. However, this 4f-4f, 6Pj → 8S7/2 intra-configurational transition of Gd3+ is weak and hence needs to be sensitized. Suitable sensitizers like Bi3+, Pr3+ are found to enhance the PL emission of Gd3+. Such phosphors with sensitized Gd3+ emission is highly suitable for phototherapy lamps.
Synthesis and photoluminescence properties of novel red-emitting KMg4(PO4)3: Eu3+ phosphors for UV-excited white-light emitting diodes
Authors: Mehare Chaitali M , Jog Milind , Mehare M D , Dhoble N S , Dhoble S J
Published: June 2021

The trivalent Eu3+ activated KMg4(PO4)3 phosphor has been successfully prepared via solid state diffusion technique. The phase formation and structural morphological studies carried out by XRD pattern and SEM analysis. The photoluminescence excitation spectra centred at 395 nm attributed to 7F0→5L6 energy transition levels. PL emission spectra centred at 593 nm and 613 nm corresponds to 5D0→7FJ( J=1,2) transitions of Eu3+ in the host respectively. The experimental results showed that Eu3+ singly doped KMg4(PO4)3 phosphor under UV excitation gives intense red emissions. The critical Eu3+ quenching concentration (QC) was determined to be 1.0 mol% along with excellent CIE coordinates of (0.6326, 0.3670). All the above results exhibits, the prepared phosphor is promising material as UV excitable red emitting phosphor for w-LED.
Photoluminescence and upconversion emission of Er3+/Yb3+ codoped tungsten tellurite oxyfluoride glasses
Authors: Ansari Ghizal F , Parashar J , Mahajan S K
Published: June 2021

The codoped YbF3 / ErF3 with the optimum composition of TeO2-Li2O-WO3 (TWLEYF) oxyfluoride glasses in which minimizing the fluoride contain were synthesized by melt quenching technique. UV-Vis absorption spectrum of the sample was measured for identification of the absorption levels of Er3+/Yb3+ ions in the glass. Photoluminescence of glass sample produced the intense broad blue emission of Er3+(2mol%) under UV excitation at 380nm. The intense green upconversion at 535nm and weak green at 550nm under 800nm excitation has been measured. Also, a weak blue and red upconversion emission band of Er3+ ions was observed. Further for 2 mol% of YbF3 in TWLEYF samples is attributed to enhance 535nm emission due to energy-transfer process while the red emission is based on non-resonant energy transfer performs. At room temperature green fluorescence decay times of 4S11/2 level of Er3+ ions under 488nm pulse excitation duration at rate < 10ns have been measured. Moreover, 530nm upconversion emission process of tungsten tellurite oxyfluoride glasses were discussed which would be useful for optical devices.
Photoluminescence study of Ce3+ activated blue emitting Ca14Al10Zn6O35lamp phosphors
Authors: Rangari Varsha , Panse V R , Dhoble Samiksha B , Dhoble N S
Published: June 2021

The photoluminescence analytical study of Ce3+ doped Ca14Al10Zn6O35 phosphors is done in this research work. Powder X-ray diffraction technique (XRD) along with scanning electron microscope i.e. (SEM), CIE colour coordinates including their PL properties with emission intensity effect too were analyzed for the characteristics of prepared phosphors. In the instance of Ca14Al10Zn6O35:Ce3+, the emission spectra demonstrates an exclusive 442 nm centered band corresponding to Ce3+’s 4f–5d transition. The result specifies that the Ce3+ activated Ca14Al10Zn6O35 phosphor could find out applications in the light phosphor production.
Synthesis and photoluminescence properties of rare earth doped BaAl2S4 and MgAl2S4 phosphor
Authors: Gharpure A R , Wankhede S P
Published: June 2021

Different synthesis techniques for BaAl2S4 have been described in literature. Conventionally thioaluminates (BaAl2S4) were prepared by solid state reaction. BaAl2S4 was prepared by using BaS and Al2S3 in H2S atmosphere [1, 2]. Sulfurization reduction of multi component oxide precursor was used to prepare BaAl2S4 in CS2 atmosphere at 1050°C. [2, 3]. Oh et al. [4] prepared MgAl2S4 doped with Co2+ by the chemical transport reaction method. All these methods require proper apparatus and they are difficult to handle.

The synthesis method and photoluminescence properties of MgAl2S4:Eu2+ and BaAl2S4:Ce3+ phosphors are reported. In this paper wet chemical co-precipitation method is described for synthesis of magnesium and barium aluminates. BaAl2S4 and MgAl2S4 phosphors doped with Eu2+ and Ce3+ shows strong excitation in nUV region. This method is very simple and does not require H2S gas flow [2]. We successfully prepared MgAl2S4:Eu2+ and BaAl2S4:Ce3+ powders by this method. MgAl2S4 doped with Eu2+ act as blue component in display application.
Structural and optical properties of chromium doped zinc gallate long persistent phosphor prepared by surfactant assisted hydrothermal method
Authors: Kumari Puja , Mondal Amba , Kumar Choudhary Anil , Ambast Deepak K S
Published: June 2021

Herein, CTAB surfactant aided hydrothermal reaction was carried for preparing Cr3+ doped ZnGa2O4. Urea was used as fuel to continue the reaction. By fixing Cr3+ ions conc. to 0.5 mol%, the molar ratio of CTAB was varied. We used XRD, TEM, FTIR, PL, UV-VIS spectroscopy, decay kinetics, and afterglow decay experiments to characterize the samples. XRD data suggested a cubic phase matching with JCPDS card no. 00-038-1240. TEM images confirmed the formation of nanoparticles within the range 20-80 nm. The estimated band gap was around 4.8 eV. Excited by 227 nm UV lights elaborated a wide emission band extended from 600 to 800 nm and peaking at 696 nm. The afterglow decay curve showed a long persistent signal up to 1 hour after ceasing offthe excitation source.
Effect of copper concentration on ethanol sensing performance of Cu-stilbite thick film sensor
Authors: Mahabole M P , Lakhane M A , Naik K B , Kutte V D , Ghadge A , Khairnar R S , Bogle K A , Sabale P B
Published: June 2021

The present study deals with natural stilbite zeolite commonly named as Ca-stilbite. Ion exchange process is carried out for partial exchange of calcium ions by copper ions. Ion exchanged stilbite is characterized by different spectroscopic techniques as XRD, FTIR and EDS techniques. Thick films are deposited on pre-cleaned glass substrates using screen printing technique. The sintered films are finally used for ethanol detecting. The Ca-stilbite zeolite structure is confirmed by the characterization techniques XRD and FTIR. Incorporation of copper ions in stilbite structure can be confirmed by EDS data. The Cu-stilbite films showed good ethanol detectors. The operating temperature, ethanol response, response/recovery nature are observed to be the functions of concentration of copper ions. Higher the copper concentration (0.2M) lower is the operating temperature (90°C) and higher is the ethanol sensitivity (233). It can be concluded that partial replacement of calcium by copper ions in stilbite leads to change in operating temperature and sensitivity.
An introduction to flexible electronics: Manufacturing techniques, types and future
Authors: Sircar Aenakshi , Kumar Hemant
Published: June 2021

Flexible Electronics is an emerging technology in the fields of electronics. These are electronic circuits made on substrates which can be modified into various shapes. It can be rolled or twisted with minimal or no effect on its electronics components and its function. Flexible electronic components are usually made of a bi-layer of thin substrate which can be either plastic, metal or textile or any other suitable material with a second layer of active electronic component. Wide range of its application in solar cells, aerospace and medical fields have increased its demand by many folds. Flexible electronic circuits play a major role in components where density, availability of space, and weight of the material has to be taken into consideration. The following is the review of the current status of it the modern electronic industries, its manufacturing process, its application in various technological fields, and the role it will play in the future
Prediction of vibrational spectroscopic characteristics of bioactive natural product using density functional theory
Authors: Mishra Ashok Kumar , Gupta Vimlesh , Tewari Satya Prakash
Published: June 2021

The present study discusses the applicability of density functional theory to investigate the vibrational spectroscopy of some bioactive natural products implementing variety of functional-basis set combination to find out suitable theoretical model. The DFT at B3LYP/6-31+G (d, p) and at higher level functional-basis set combination have been obtained to be feasible for this purpose. The IR & Raman active vibrations at the normal modes have been obtained by the theoretical computation in the selected natural product namely Isodihydroaminocadambine. The vibrations in the various domains have been ascertained due to C-H stretching, C-H in plane bending, C–H out of plane bending, C–C stretching and other low domain frequencies calculated through the said theoretical approach. The theoretical IR spectra exhibit at most intensity at 3 88 cm−1. The strongest Raman activity has been observed at 3202 cm−1 which is the characteristics of this molecule. The spectroscopic characteristics reported in the present study may be applicable for characterizing the title molecule for exploring its different applications.
Reflectivity simulation by using transfer matrix method
Authors: Keskar D , Survase S , Thakurdesai M
Published: June 2021

Efficiency of optoelectronic devices can be enhanced by using Distributed Bragg Reflector (DBR). Distributed Bragg Reflector (DBR) is a multipair layered structure of high and low refractive indices. High reflectivity of DBR is due to constructive interference of reflected light from interfacial layers of DBR. In the present paper, reflectivity of DBR composed of II-VI compound semiconductor is simulated using Transfer Matrix Method (TMM). In this paper, reflectivity of 4, 8, 12, 16 and 20 periods for the incidence angle of 45+ is simulated. Also, the effect of interchange of constituent layers in DBR stack, on reflectivity is simulated.
Eco-friendly synthesis route of silver nanoparticle: A review
Authors: Gundo Sakshi , Parauha Yatish R , Singh Neelu , Dhoble S J
Published: June 2021

Nanotechnology is concerned with the production and use of nano-sized materials. In the development of nanotechnology, the synthesis of metal nanoparticles is a reliable and environmental friendly step. At the present time, the use of the biosynthesis method in the development of metal nanoparticles has been developed as an alternative synthesis route, removing the limitations of traditional synthesis methods such as physical and chemical methods. In the biosynthesis process, researchers are facing challenges to synthesize stable and geometrically controlled Silver Nanoparticles (AgNPs). In the past few years, the plant-mediated synthesis method has proved to be important in the development of stable, low cost and environment-friendly AgNPs and has been described by many researchers. In the past decade, silver nanoparticles (AgNPs) are the most studied and used nanoparticles due to their unique properties. In this review, we have discussed the eco-friendly synthesis route for the development of AgNPs and its application in various fields.
Evaluation of contact angle of water proof coated fabric made from melt-blown polyester non-woven and acrylic polymeric materials
Authors: Ramaiah G B , Mekonnen S , Solomon E , Melese B , Rao K P
Published: June 2021

Water proof fabrics are hydrophobic in nature. Contact angle measurement is a characterization technique used to gauge how well the water proof fabrics designed and developed is useful in preventing seepage of water through fabric surface. The water-proof coated fabric was developed using polyester non-woven fabric made by melt-blown process as base material. Binder made using acrylic polymer was used for preparation of the water-proof coated fabric using layering technique. Different layer configurations like single and double layers was used to develop the non-woven coated fabric. The developed fabrics was subjected to morphological studies using scanning electron microscope. The water proof coated fabrics was also analyzed for its static contact angle measured using rame-hart instrument. The contact angle was measured for both single layer and double layer water proof fabrics at different positions. The contact angle range was reported from 96° - 58° for single layer water proof coated fabrics. However, for double layer water proof coated fabrics the contact angle reported was in the range of 82°-68°. The contact angle changes for different angle of measurements and orientations. The results show that contact angle is not only a function of hydrophobic character of polyester non-woven fabric base material but also depends on the process parameters like number of layers, the thickness of coating, coating technique and the moisture levels that the acrylic polymer binder coating material absorbs the liquid from its surface. The forces acting on the surface of the coating material mainly influences the contact angle of the coated surface. The water repellency increases with the increase in static contact angle.
Photoluminescent studies of 2, 2’-dihydroxybiphenyl, ethylenediamine - formaldehyde copolymer
Authors: Chakole S P , Nandekar K A , Gurnule W B
Published: June 2021

Polymer resin-II (2,2’-DBPEDF) synthesized by the condensation polymerization of 2,2’-dihydroxybiphenyl (DBP), ethylenediamine (ED) and formaldehyde (F) in acidic medium with molar ratio 2:1:3 of monomer and refluxing in oil bath at 120°C for 5 hr. Synthesized copolymer as a ligand is combined with metal particles such as Ni2+, Cu2+ and Zn2+ ions is in 2:1 molar proportion to get metal complex. The reaction has been finished with refluxed at 60°C for three hour. Composition and structure of organic polymer resin-II have been determined by elemental analysis and molecular weight determination by non-aqueous conductometric titration. The UV-visible, FTIR, proton nuclear magnetic resonance and surface feature and crystalline behaviour of ligand and its complexes were analysed by SEM. Newly synthesized copolymer with metal complexes with copper and zinc metal may be used as supporting material for luminescence 2,2’-DBPEDF-Cu show higher photoluminescence than 2,2’-DBPEDF-Zn.
An investigation of mechanical properties of concrete by addition of sugarcane baggase ash and steel fiber
Authors: Solanke Shrikant S , Pawade P Y
Published: June 2021

Concrete is a powerful industrial substance into construction industry due to the durability and its strength properties. Construction industries have drained natural resources as well as build the poisonous material in the atmosphere by the utilization of raw materials. The substitute items have been found to conserve the natural resources and atmosphere to some degree. Utilization of this atmospheric waste material into the construction industry without much treatment may be a good alternative for natural aggregates. Accordingly, in this paper M30 grade of concrete mix (As per IS 10262:2009) is replaced with natural / industrial wastes like sugarcane bagasse ash and steel fiber. For casting the concrete cube, the replacement dosage of Sugarcane bagasse ash and steel fibre varied from 0% to 20% in the level of 5% and 0% to 1.5% in a level of 0.5% respectively by cement weight. Concrete cube having above ingredient of the mixes was cured for 7, 28 and 90 days. The impact of the mixture of sugarcane bagasse ash and steel fibre on different mechanical properties like compressive/flexural/split tensile strength was examined. It was observed that addition of 10 % of sugarcane bagasse ash and 1% of steel fibre into cement is a promising combination that provides optimum mechanical properties.
Synthesis and Single Crystal X-ray Studies of Cyclic Te(IV) Diiodide
Authors: Singh Puspendra , Singh Priyanka , Shabbaniand Gulam , Butcher Ray J
Published: June 2021

The cyclic tellurium(IV) diiodide, 2-Methyl-1,1-diiodo-1-telluracyclopentane, was prepared in good yields at room temperature by the incorporation of tellurium powder across Carbon–Iodine bond in presence of sodium iodide and acetone. The cyclic tellurium(IV) diiodide compound has been established by proton and 13carbon NMR spectroscopy along with elemental analysis. This compound was further characterized by 125Te NMR in DMSO. Molecular structures of cyclic tellurium(IV) diiodide was also established by single-crystal X-ray studies. In solid-state, molecular structures of cyclic tellurium(IV) diiodidepossess scarcely observed Te…I secondary bonding interactions (SBIs) and two molecule are co-crystallized. Both molecules are interconnected with each other by Te…I secondary bonding interactions. The five-membered rings acquire a twist-boat shape structure. Observed C–Te–C bond angles for molecule A, and molecule B are 85.0(1)°& 85.4(2)° respectively. Similarly observed, I–Te–I bond angles for both molecule A & B are 174.5(1)°&174.2(1)° respectively.
Synthesis and Single Crystal X-ray Studies of Dimesityl Ditelluride: [2,4,6-Me3C6H2Te]2
Authors: Singh Puspendra , Singh Priyanka , Shabbani Gulam , Butcher Ray J
Published: June 2021

The reaction of freshly prepared mesityl magnesium bromide with tellurium powder in anhydrous THF provided the dimesityl ditelluride: [2,4,6-Me3C6H2Te]2. A suitable needle-shaped crystal of dimesityl ditelluride was developed by evaporation of a solution in chloroform. The Te compound was developed with the orthorhombic space group Iba2 with a = 15.2916(7) Å, b = 15.7225(7) Å, c = 14.5272(7) Å and α,□β,□γ = 90°. The geometry about the central tellurium atoms adopt a bent-shaped geometry with torsion angle C10–Te2–Tel–C1 = 87.0(3)°□ and this may be considered a cisoid conformation. Intermolecular C–H….Te interactions give rise to a two-dimensional supramolecular synthons in its crystalline state. The crystal packing diagram shows Te….H [Te1….H5A, 3.2557(5) Å & Te1….H8C, 3.2578(5) Å] hydrogen-bonding interactions which are responsible for associative forces.
Molecular docking studies of N-(benzo[d]thiazol-2-ylcarbamothioyl)-2/4-substituted benzamides as an anti-bacterial inhibitor for E. coli dihydroorotase
Authors: Wanjari P , Bharati A , Wanjari M
Published: June 2021

In pharmacological studies, it is common that drug molecules fail in the final stages of testing. Human, as well as animal trials, have serious regulatory limitations. An alternate option to test energetically suitable binding conformations of synthesized ligands in a dynamic site cavity of a target receptor is to accomplish a molecular docking study. After carrying out the synthesis, characterization, and biological evaluation of molecular properties experimentally, to strengthen and investigate the findings further, we have carried out a molecular docking study to conform binding of ligand N-(benzo[d]thiazol-2-ylcarbamothioyl)-2/4-substituted benzamides against the protein E. coli dihydroorotase (PDB ID 2eg7). Among the synthesized compounds 3a, 3b, 3c, and 3e are found to have promising antibacterial activity. Moreover, the compound 3a is identified as a potential lead molecule with the lowest binding affinity value.
Effect of nanofluid additive and after treatment devices on engine emission - A review
Authors: Pitale Amol , Walke Pramod , Khond Vivek
Published: June 2021

This research paper summaries the research carried by various researcher in the field of Nanofuids and after treatment devices on performance and emission of CI engines. Basically there are two methods of reducing the emission in the engines. First method is completely burn the fuel i.e. converting hydrocarbon and eliminating the emission. Suppose if the fuel is not completely combustible and it produces emission but it can be reduced by treating it before it enter the atmosphere, this is another way of reducing exhaust emission. The major exhaust emission are NOx and PM i.e. particulate matter. It is evident from many research papers that combustion can be improved by adding Nano additives to reduce the emission. Researcher have used various nano particle of various size and material to improve the performance of the engine and reduce emission. Also they have used various after treatment device reduce emission.
Finite element analysis of diesel exhaust fluid tank holding bracket
Authors: Subhedar Aditi , Bohra Bhavesh
Published: June 2021

With low running costs, diesel engines have performance, longevity and reliability. In addition to their benefits, they play a very significant role in the degradation of the atmosphere. Hence after treatment technology is adopted to control the emissions caused by these engines to treat the exhaust gas coming from the engine. Selective catalytic reduction is one such method after treatment that is used to treat the NOx (Nitrogen Oxides) content of the engine’s exhaust gas. Diesel Exhaust Fluid tank holding bracket supports the (Diesel Exhaust Fluid) tank and its complete assembly. Diesel Exhaust Fluid tank and its assembly is responsible for storage, calculated injection of Aqueous Urea Solution 32. Weight reduction of the Diesel Exhaust Fluid tank holding bracket is a major parameter of concern as it helps us increase the payload capacity of the vehicle and also increase the overall fuel efficiency. This paper presents the steps followed while performing the Finite Element Analysis on the existing Diesel Exhaust Fluid tank holding bracket. Based on the results of the existing dimensions, the new dimensions are designed and analysed.
Adsorbent from waste tires as activated carbon for removal of heavy metals from waste water-A review
Authors: Sudame Aruna M , Ugale Manjusha , Raut Ekta R , Kapgate Bharat
Published: June 2021

Globally there is an increasing need for green solutions to environmental challenges. One of the many challenges that plagues our environment is the problem of heavy metals especially those from waste water. Heavy metals are very difficult to remove using simple chemical processes, and when not properly removed during distillation processes it can find its way to drinking water thereby causing serious health challenges like damage of important organs and even cancer. How ubiquitous this problem is and the fact that waste water is part of every thriving urban community calls for very innovative approach to solving this challenge of heavy metals in waste water. This study uses an innovative approach to solving this challenge, by using carbon found in waste tires as an adsorbent for removing heavy metals. Our approach is using a waste material very endemic in our communities to solve another waste material which is causing problem to health and environment. The ripple effect of our approach is that it helps reduce tires waste in our surrounding, while also removing heavy metals from waste water.
Sorption of Cu (II) Ions by Adsorption using Orange Peel
Authors: Malkhedeand S S , Rao Y R M
Published: June 2021

The purpose of the present work is to find out feasibility of the process to remove copper ions from the aqueous solution using powdered orange peel as an adsorbent. Powered activated carbon was also used along with pretreated orange peel to compare the efficiencies. Adsorption is taken into consideration to be one of the most excellent technologies broadly used in international environmental safety regions. Batch adsorption study was conducted to find out the impact related to the numerous strictures like pH, contact period, adsorbent dosage, concentration of preliminary metal Cu(II) ions besides the size of the adsorbent particle on the removal of copper ions from synthetic solutions. The statistics related to the adsorption isotherm which was obtained by carrying out the experiments, performing modeling of such data is very important so that forecasting of adsorption besides knowhow of adsorption. Experimental statistics were investigated with the use of numerous models related to the adsorption and that includes BET model, Freundlich model, Langmuir model as well as Modified Freundlich isotherms model. Equilibrium facts are also evaluated with the use of above-mentioned models related to the process of adsorption.
Pali lexicography using lexonomy
Authors: Sakhare Anupama Devendra , Shareef Arshad , Rangari Varsha
Published: June 2021

Lexonomy is a platform which is an open source for writing and publishing dictionaries. Pali Lexicography is actually a dictionary created by using Lexonomy, which is a web based tool for creating dictionaries. Since a dictionary is a means of understanding any language and its translation, the present work is about Pali Lexicography. It is a project that has been created using simple XML tags and technical skills without any cost. In this, word mapping is done using selected words that are chosen from the set of Pali Language which are also present in the Marathi Language set having almost similar meaning in Marathi Language. All the Pali words have their English meaning which are automatically sorted generating the Lexicographic order. Pali dictionary is created with a simple user interface and is easily operable.
Heart disease prediction using data mining
Authors: Fadnavis R , Dhore K , Gupta D , Waghmare J , Kosankar D
Published: June 2021

There is huge amount of information accessible within the healthcare systems. But there do not exist enough analysis tools to mine uncovered, unusual but useful patterns in data. Data mining has been used successfully in various fields to discover hidden patterns and trends, alerting about the hidden anomalies in the data or simply helping in the decision making process. This paper how classification techniques in data mining can be applied for heart disease prediction. To predict and alert about any future coronary ailment in the patients techniques like Naïve Bayes, and Decision tree are applied and efficiency of these algorithms is compared. The dataset taken is Cleveland dataset with 14 attributes.
Dynamical behaviours of Chaplygin gas, cosmological and gravitational ‘constants’ with cosmic viscous fluid in Bianchi type V space-time geometry
Authors: Kotambkar S , Kelkar R K , Singh G P
Published: June 2021

This paper is devoted to study modified Chaplygin gas and cosmological ‘constant’ as candidates of dark energy in the presence of cosmic viscous fluid with reference to the Bianchi type V space-time geometry. To represent a more viable cosmological model, variation of gravitational ‘constant’ is also considered. Precise solutions of equations of field have been acquired, where scale factors expand as monomial functions of cosmic time. Further, by use of graphical representation, behaviours of various parameters are also examined.
A comparative study of energy and task efficient load balancing algorithms in cloud computing
Authors: Gaikwad A D , Singh K R , Kamble S D , Raghuwanshi M M
Published: June 2021

The future growth of the Internet of Services has fundamentally changed the emergence of cloud computing. Cloud data centres serve multiple tenant demands for cloud applications that discharge vast amounts of electricity, leading to high operating costs and environmental diffusion of carbon dioxide (CO2). To fix this is the need for preservation to enable potential use by building a new structure and measuring the effect in a cloud data centre. Consequently, the use of pruned electricity reduces the cost of processing power. In order to meet energy-efficient data centres in the cloud, adjusting to optimal load balancing processing a good way for energy savings. To minimise the large energy use of cloud data centres herds, this focuses on increasing efficacy by breaking the workload evenly. In this paper, we plan to provide a comprehensive comparative analysis in cloud computing of current load balancing algorithms.
Analysis of Covid-19 in India using mathematical modeling
Authors: Pidurkar Smita R , Thakran B , Raut Seema , Thakre L P , Vaidya N V
Published: June 2021

An infectious disease COVID-19 is caused by virus called coronavirus. The corona virus transmitted from individual to individual through droplets / contact. The first conformed case of India was on 30 January 2020 occurred in Kerala. As still no vaccine is available for controlling it so from initial stage government of India started different initiatives like lockdown, work from home, suspension of train services and international flights, implemented rules and regulation such as limiting the number of passengers in the vehicle, banning on social gathering to control on this virus. Ministry of Health and Family Welfare (MoHFW) was launched a nationwide training for front line health worker on COVID19. Hence the implication of the study becomes very crucial. In this paper the special case of India is considered from the initial period to October 2020. Based on available data, the analysis of this viruses is studied also the different cases of stability is checked by considering logistic growth in prey population. The parameter which used to study this case are predators, prey, time, prey’s growth rate, attack rate, predator or consumer mortality rate, conversion efficiency and maximum curing capacitive rate.
A comparative study of Laplace and Kamal transforms
Authors: Katre N T , Katre R T
Published: June 2021

There are numerous integral transforms which are being extensively usedto solve many of the real life, science and engineering problems. In this paper, two integral transforms namely Kamal transform and very famous Laplace transform are studied comparatively. Application of these transforms to solve linear difference equations is demonstrated. Study shows that these integral transforms are in close connection to each other.
Anti-magic Labeling of Cartoon Flowers and Consecutive Wounded Flowers
Authors: Nemani S , Joshi G
Published: June 2021

An anti-magic labeling of a finite simple undirected graph G is a bijection from the set of edges to the set of integers {1, 2,…, |E(G)|} such that the vertex sums are pairwise distinct, where the vertex sum at one vertex is the sum of labels of all edges incident to such vertex. A graph is called anti-magic if it admits an anti-magic labeling. In this paper, we established an anti-magic labeling of the cartoon flowers. We further define a new subclass of the cartoon flower called the consecutive wounded cartoon flower and then established an anti-magic labeling of the consecutive wounded cartoon flowers.
Graphical indices of some chemical structure graphs
Authors: Puri Prafulla , Korde Vivek
Published: June 2021

In present situations for theory and applications point of view graph theory is useful. Graphs are used as a representative tool for many problems of applied consequence. For illustration, a system of towns, which are considered by vertices, and connections among them make a biased graph. In present work graphical structure of graphene and ferroelectric hysteresis curve is explain.
Energy efficient quaternary capacitive DAC switching scheme using sar analog to digital converter
Authors: Sangewar S , Gugulothu S , Khandelwal R
Published: June 2021

This article shows the outline of successive approximation register-ADC used to convert the signals obtain from the brain into electrical signal. Quaternary capacitive exchangin vitality conspires (QCS) within the execution of (C-DAC) is utilized which makes the vitality utilization in the C-DAC free of the yield advanced output code. This method accomplishes a 50% diminishment within the normal vitality utilization. The design is actualized in 0.25nm technologyusing complementary metal-oxide semiconductor (CMOS).