Lupine Publishers Group

Sujit Kumar Biswas, Soma Rani Roy* and Mahbubul Alam

DOI : 10.32474/AOICS.2021.05.000221

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Purpose: To observe the outcome of chemical corneal tattooing suffering from disfiguring corneal scar by using platinum chlo-ride and hydrazine hydrate. Methods: Eighteen patients who had no other measures for visual improvement, unable to use cosmetic contact lenses and unwilling to do enucleation but wanted cosmesis were included. Overlying epithelium of corneal scar were removed, freshly pre-pared 2% platinum chloride solution applied for 3 to 4 minutes followed by application of freshly prepared 2% hydrazine hydrate solution for 30 seconds resulting in jet black color. After washing with Ringer’s lactate solution bandage contact lens were applied and patched for 24 hours [1]...... ReadMore

Felipe Salas, Mireya Santander Nelli, Denis Fuentealba, Jerónimo R Maze, Iván González* and Paulina Dreyse*

DOI : 10.32474/AOICS.2021.05.000219

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A series of Ir (III) complexes [Ir(F2ppy)2(neo)](PF6 ) (C1 ), [Ir(F2ppy)2 (biq)](PF6 ) (C2 ), [Ir(F2ppy)2 (dabiq)](PF6 ) (C3 ), [Ir(bzq)2 (- neo)](PF6 ) (C4 ), [Ir(bzq)2 (biq)](PF6 ) (C5 ), [Ir(bzq)2 (dabiq)](PF6 ) (C6 ), have been synthesized and their photophysical properties were investigated supported by theoretical calculations to propose emitters based on single complex or host-guest blend to potential applications in LEC devices. In acetonitrile, C1 and C4 showed emissions at higher energies (490-515 nm); C2 and C3 emitted λ580 nm, and C5 and C6 at low energy (λ615 nm). C1 reached the higher quantum yield (43%) and lower values (3-5%) were obtained with C5 and C6. The photophysical differences are consistent with cyclometalating and ancillary ligand natures, since both are involved in the triplet emitting states. The experimental..... ReadMore

Alexandra N Protsenko, Olga G Shakirova*

DOI : 10.32474/AOICS.2021.05.000218

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dustry, modern pro-duction needs new highly efficient and more environmentally acceptable catalysts, catalytic media, and solvents. Over the past few years, complexes of transition 3d-metals with nitrogen-containing cations of the composition (HL)n [MHal4 ] have attracted great interest in oil chemistry as new catalytic systems [1]. Tetrahalide complexes of copper (II) and cobalt (II) with 2,3,5-triphenyltetrazolium chloride of the composition (2,3,5-ph3 Tz)2 [MCl4 ] [2] show high catalytic activity in the joint lowtemperature process of isomerization and dehydrocyclization of n-heptane. In the present work, the complexes are formed because of the interaction of hydro-chloric acid solutions of halometalates (II) with aqueous solutions. According to the X-Ray data, the presented coordination compounds have a crystal structure, in which eac..... ReadMore

Krishnaveni Karuppiah, Murugesan Sepperumal and Siva Ayyanar*

DOI : 10.32474/AOICS.2021.05.000213

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A new indole based chemosensor, 2-((5-bromo-1H-indol-2-yl) methylene) hydrazono) methyl)-4, 6-diiodophenol (BHDL) has been developed for the selective and sensitive detection of biogenic tryptamine and F‒ ions. The binding affinity of probe BHDL towards F‒/tryptamine (TryptA) has been investigated by UV-visible/fluorescence spectroscopy. In the presence of TryptA, probe exhibits strong enhancement in an emission band at 433 nm and the band at 555 nm underwent a blue shift accompanied by a decrease in intensity by the inhibition of Excited State Intramolecular Proton Transfer (ESIPT) functioned on BHDL. Interestingly, complexation with F‒ ions as well triggers an enhancement in a fluorescence band at 430 nm with the concomitant disappearance of the emission band at 555 nm due to the inhibition of ESIPT and deprotonation process initi..... ReadMore

Maria G Burdanova* and Alexey P Tsapenko

DOI : 10.32474/AOICS.2021.05.000210

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Transient terahertz (THz) spectroscopy is a powerful non-contact, non-destructive technique for analysis of the photoinduced electronic properties of carbon nanotubes (CNTs). This technique allows measuring the photoinduced changes of the frequencydependent conductivity (photoconductivity) with a picosecond timescale. Thus, it makes this technique suitable for ultrafast processes occur in the nanotubes. Many important CNT parameters such as mobility, scattering rate, carrier concentration and a lifetime can be measured accurately using transient THz spectroscopy. The strong many-body interactions inherent in this material result in bright, dark excitons, trions coexistence with free charges and can be revealed using this technique. Therefore, in this perspective, we discuss the recent THz photoconductivity studies of CNTs. Carbon nanotube..... ReadMore

Mostafa Gouda*

DOI : 10.32474/AOICS.2021.05.000203

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Global interest of new consumption, nutrition trends, and market for dietary phytochemical functional supplements have greatly increased over recent decades. In which, commercially available food supplements based on microalgae such as Spirulina (Cyanobacteria) are becoming increasingly popular. Microalgae are rich in important nutritional phytochemicals such as phycocyanin novel protein in Spirulina, polyphenols, flavonoids, and vitamins, all which are known to positively impact human health. This review discusses the beneficial impacts of using microalgae and their phytochemicals in the different fields with their production limitation. Also, different recent analytical methods are highlighted to emphasize the trending of this very important approach which are directly related to the human health and the ..... ReadMore

Dahryn Trivedi, Mahendra Kumar Trivedi, Alice Branton and Snehasis Jana*

DOI : 10.32474/AOICS.2021.05.000202

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Cefazolin sodium is a broad-spectrum antibiotic, which is used for the treatment of a number of bacterial infections. In this study the impact of the Trivedi Effect-Biofield Energy Healing Treatment on the isotopic abundance ratio of cefazolin sodium using LCMS and GC-MS spectroscopy. The test sample cefazolin sodium powder was divided into two parts and termed as control and treated sample. The control test sample did not treat with the Consciousness Energy Healing Treatment. However, the treated test sample received the Consciousness Energy Healing Treatment remotely by the renowned Biofield Energy Healer, Dahryn Trivedi. The LC-MS spectra of both the samples at the retention time (Rt) 4.6 minutes exhibited the mass of the protonated molecular ion peak at m/z 455 [M+Hs. The peak area of the treated cefazolin was significantly increas..... ReadMore

Mohamed S Nagar*, Bayoumi MB and Walid M Morsy

DOI : 10.32474/AOICS.2021.05.000201

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In the Halaib area, South Eastern Desert, Egypt, numerous occurrences of uranium have been found. Uranium occurs as disseminated minerals (uraninite, uranophane, beta-uranophane) in G. Qash Amir muscovite monzogranite. The muscovite monzogranite (G. Qash Amir) is affected by deutric alteration and characterized by gradational contact with two-mica monzogranite, peraluminous in nature with visible primary and secondary uranium minerals, beryl and columbite. Uranium dissolution efficiency of 81.0 % was obtained using acid gitation leaching without oxidant addition, while dissolution efficiency increased to about 92% when ORP was increased to about 475mV using MnO2 as an oxidizing agent in Qash Amir uranium mineralization. Column tests were performed to study the effect of the parameters on uranium leaching and acid consumption. After 40 da..... ReadMore