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Synthesis and Biological Studies of Novel Biphenyl-3,5-dihydro-2H-thiazolopyrimidines Derivatives
Maddila, S.,Damu, G.L.V.,Oseghe, E.O.,Abafe, O.A.,Rao, C. Venakata,Lavanya, P. Korean Chemical Society 2012 대한화학회지 Vol.56 No.3
A new series of ethyl 2-(4-substitutedbenzylidene)-5-(3'-(ethoxycarbonyl)biphenyl-4-yl)-7-methyl-3-oxo-3,5-dihydro-2H-thiazolo[3,2-a]pyrimidine-6-carboxylate derivatives ($\mathbf{8a-j}$) were synthesized. The newly synthesized compounds were characterized by $\mathbf{IR}$, $^1\mathbf{H}$ $\mathbf{NMR}$, $^{13}\mathbf{C}$ $\mathbf{NMR}$, $\mathbf{LCMS}$ $\mathbf{mass}$ and $\mathbf{C}$, $\mathbf{H}$, $\mathbf{N}$ analyses. All newly synthesized compounds were screened for their In vitro antioxidant activity (Scavenging of hydrogen peroxide, Scavenging of nitric oxide radical, and Lipid peroxidation inhibitory activity), antibacterial (Escheria coli, Pseudonmonas aeruginosa (gram-negative bacteria), Bacillus subtillis, Staphylococcus aureus (gram-positive bacteria)) and antifungal (Candida albicans Aspergillus niger) studies.
Degradation, mineralization of bromoxynil pesticide by heterogeneous photocatalytic ozonation
Suresh Maddila,Palakondu Lavanya,Sreekanth B. Jonnalagadda 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.24 No.-
The photocatalysts of Cs doped bare TiO2, 0.50 and 1.0 wt% were prepared by wet-impregnation method and characterized by XRD, SEM-EDX, TEM, BET, ICP, FTIR, and UV-DRS analyses. The degradation of bromoxynil was investigated under visible irradiation with ozone to compare the efficiency of these photoinduced advanced oxidation techniques. Photocatalysis with 1% Cs/TiO2 was yielded 100% degradation and mineralization of bromoxynil in 2 h at basic pH. The extent of degradation was confirmed by GC–MS. The oxidation products were identified by 1H NMR and GC–MS spectral analyses. The catalyst is fully recoverable and reusable multiple times with no loss of activity.
Teena Sharma,Ravi Kumar Maddila,Syed Alwee Aljunid 한국광학회 2019 Current Optics and Photonics Vol.3 No.6
Spectral Amplitude Coding Optical Code Division Multiple Access (SAC OCDMA) is an advanced technique in asynchronous environments. This paper proposes design and implementation of a novel quantum logic gate (QLG) code, with code construction algorithm generated without following any code mapping procedures for SAC system. The proposed code has a unitary matrices property with maximum overlap of one chip for various clients and no overlaps in spectra for the rest of the subscribers. Results indicate that a single algorithm produces the same length increment for codes with weight greater than two and follows the same signal to noise ratio (SNR) and bit error rate (BER) calculations for a higher number of users. This paper further examines the performance of a QLG code based SAC-OCDMA system with NAND and direct detection techniques. BER analysis was carried out for the proposed code and results were compared with existing MDW, RD and GMP codes. We demonstrate that the QLG code based system performs better in terms of cardinality, which is followed by improved BER. Numerical analysis reveals that for error free transmission (10 -9 ), the suggested code supports approximately 170 users with code weight 4. Our results also conclude that the proposed code provides improvement in the code construction, cross-correlation and minimization of noises.
Kotaiah, Y.,Krishna, N. Hari,Raju, K. Naga,Rao, C.V.,Jonnalagadda, S.B.,Maddila, Suresh Korean Chemical Society 2012 대한화학회지 Vol.56 No.1
In the present study, we have synthesized novel Isopropyl 2-(4-substitutedbenzylidene)-5-methyl-3-oxo-7-phenyl-3,7-dihydro-2H-thiazolo[3,2-a]-pyrimidine-6-carboxylate derivatives (6a-j). Elemental analysis, IR, $^1H$ NMR and mass spectral data elucidated structure of newly synthesized compounds. The newly synthesized compounds were screened for antiinflammatory and anti microbial studies. Their biological activity data of the 10 compounds indicates that two compounds posses potent anti-inflammatory and five have antimicrobial activities.