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Kamaraj Chinnaperumal,Naveenkumar Selvam,Prem Pradisha,Ragavendran Chinnasamy,Subramaniyan Vetriselvan,Al-Ghanim Khalid A.,Malafaia Guilherme,Nicoletti Marcello,Govindarajan Marimuthu 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.4
Green nanoparticles represent a sustainable and eco-friendly approach to developing larvicides targeted at controlling mosquito populations. These nanoparticles are synthesized using natural, non-toxic materials and environmentally benign processes, emphasizing their potential to combat mosquito larvae while minimizing adverse effects on the ecosystem. This approach aligns with the growing need for sustainable solutions in vector control, providing an effective alternative to traditional larvicides with reduced environmental impact. The aim of the present investigation we have utilized the leaf from Laureliopsis philippiana (LP) to synthesize silver (Ag) and palladium (Pd) nanoparticles (NPs) and studied toxicity on deadly disease vectors larvae of Aedes aegypti and Anopheles stephensi. Biosynthesized Ag and Pd NPs were extensively characterized through physical and chemical methods. Gas chromatography–mass spectrometry analysis of L. philippiana assisted in identifying the secondary metabolites of the extract’s total flavonoid and phenolic compounds, which are in the reactants of the bioreduction process during the production of NPs. The in-silico analysis was conducted on mosquito sterol car rier protein-2 (1PZ4) and mosquito odorant binding protein (2L2C). The biosynthesized Ag and Pd NPs revealed the UV absorption peak at 417 and 370 nm, and X-ray diffraction results showed the crystalline structure of NPs. At the same time, in transmission electron microscopy representation, the Ag and Pd NPs were spherical, clus tered, and exhibited a noticeable average size of Ag NPs: 13.25 ± 2.53 nm and Pd NPs: 4.07 ± 1.64 nm. The biogenic Ag and Pd NPs showed concentration-dependent larvicidal mortality at 12 and 24-hour exposure with LC 50 values of 29.596, 17.804, and 23.915, 14.878 µg/mL on Ae. aegypti and 23.946, 13.938, 19.457, and 12.876 µg/mL against An. stephensi, correspondingly. In-silico studies proved that Laureliopsine A and isoterpinolene showed significant docking scores compared to permethrin on mosquito proteins (1PZ4 and 2L2C). Besides, the LP-Ag and Pd NPs non-toxicity analysis was carried out on zebrafish (Danio rerio) embryos at 72 h post- * Corresponding authors. E-mail addresses: kamarajc@srmist.edu.in (C. Kamaraj), guilhermeifgoiano@gmail.com (G. Malafaia). https://doi.org/10.1016/j.aspen.2023.102164 Received 31 August 2023; Received in revised form 9 October 2023; Accepted 11 October 2023 Available online 13 October 2023 1226-8615/© 2023 Korean Society of Applied Entomology. Published by Elsevier B.V. All rights reserv
Kamaraj, Chinnaperumal,Gandhi, Pachiyappan Rajiv,Elango, Gandhi,Karthi, Sengodan,Chung, Ill-Min,Rajakumar, Govindasamy Elsevier 2018 INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES Vol.107 No.1
<P><B>Abstract</B></P> <P>The future of this study was to prepare a natural pesticide which will not harm the environment and yet control pests. Neem gum nano formulation (NGNF), a novel biopesticide prepared from the Neem gum extract (<I>Azadirachta indica</I>) (NGE) was evaluated for its antifeedant, larvicidal and pupicidal activities against <I>Helicoverpa armigera</I> (Hub.) and <I>Spodoptera litura</I> (Fab.) at 100ppm. The NGNF showed significant (100%) antifeedant, larvicidal and pupicidal activities against <I>H. armigera</I> and <I>S. litura</I>. The LC<SUB>50</SUB> values of 10.20, 12.49 and LC<SUB>90</SUB> values of 32.68, 36.68ppm on <I>H. armigera</I> and <I>S. litura</I>, respectively at 100ppm. The NGNF treatments showed differences in the activities of detoxifying enzymes, carboxylesterases, glucosidases and glutathione S-transferases in the larval gut. Earthworm toxicity illustrated that 6.25ppm of chemical insecticides (cypermethrin) varied widely in their contact toxicities compared to 100ppm of NGNF and control in both contact filter paper and artificial soil test. The NGNF were characterized and confirmed by FTIR, XRD, SEM and EDX analysis. Ten compounds were identified from the Neem gum extract (NGE) by Gas Chromatography-Mass Spectrometry (GC–MS) analysis. The major compounds were fatty acids like Hexadecanoic acid, oleic acid, and ricinoleic acid. NGNF could be used as an agent to prepare novel bio-pesticides formulations.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Neem gum mediated nano formulation (NGNF) as a bio-pesticide agent against <I>Helicoverpa armigera</I> and <I>Spodoptera litura</I>. </LI> <LI> NGNF exhibited potential antifeedant, larvicidal and pupicidal activities against <I>Helicoverpa armigera</I> and <I>Spodoptera litura</I>. </LI> <LI> Environmental toxicity was assessed by earthworm (<I>Eudrilus eugeniae</I>) there is no significant toxicity observed in NGNF treatments. </LI> </UL> </P>
MOORE-PENROSE INVERSE IN AN INDEFINITE INNER PRODUCT SPACE
KAMARAJ, K.,SIVAKUMAR, K. C. 한국전산응용수학회 2005 Journal of applied mathematics & informatics Vol.19 No.1
The concept of the Moore-Penrose inverse in an indefinite inner product space is introduced. Extensions of some of the formulae in the Euclidean space to an indefinite inner product space are studied. In particular range-hermitianness is completely characterized. Equivalence of a weighted generalized inverse and the Moore-Penrose inverse is proved. Finally, methods of computing the Moore-Penrose inverse are presented.
Moore-Penrose inverse in an indefinite inner product space
K. Kamaraj,K. C. Sivakumar 한국전산응용수학회 2005 Journal of applied mathematics & informatics Vol.19 No.1-2
The concept of the Moore-Penrose inverse in an indefinite inner product space is introduced. Extensions of some of the formulae in the Euclidean space to an indefinite inner product space are studied. In particular range-hermitianness is completely characterized. Equivalence of a weighted generalized inverse and the Moore-Penrose inverse is proved. Finally, methods of computing the Moore-Penrose inverse are presented.
Eswaran Kamaraj,박상혁 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
We report a series of imidazole based fluorescent dyes and their photophysical properties in particularly ESIPT. The impact of structural variation on photophysical properties and their association with solvent’s polarity and proticity were throughly investigated by comparing with their analogues of blocked ESIPT functionality. We have investigated their photophysical properties, using experimental transient absorption and theoretical DFT/TDDFT. Besides, the urease inhibitory activity of these compounds against Jack bean urease was also studied. All but one of the obtained compounds displayed inhibitory potential, as demonstrated by highest inhibition activity (0.0288±0.0034). Docking stimulation was performed to into the crystal structure of Jack bean urease and caprin protein at the active site to the probable binding mode. Furthermore, anti-cancer activity of imidazole derivatives were peformed by MTT analysis towards stomach cancer cell lines (AGS).
The Anticancer Role of Capsaicin in Experimentally-induced Lung Carcinogenesis
Anandakumar, Pandi,Kamaraj, Sattu,Jagan, Sundaram,Ramakrishnan, Gopalakrishnan,Asokkumar, Selvamani,Naveenkumar, Chandrashekar,Raghunandhakumar, Subramanian,Vanitha, Manickam Kalappan,Devaki, Thiruven KOREAN PHARMACOPUNCTURE INSTITUTE 2015 Journal of pharmacopuncture Vol.18 No.2
Objectives: Capsaicin (CAP) is the chief pungent principle found in the hot red peppers and the chili peppers that have long been used as spices, food additives and drugs. This study investigated the anticancer potential of CAP through its ability to modify extracellular matrix components and proteases during mice lung carcinogenesis. Methods: Swiss albino mice were treated with benzo(a) pyrene (50 mg/kg body weight dissolved in olive oil) orally twice a week for four successive weeks to induce lung cancer at the end of $14^{th}$ week. CAP was administrated (10 mg/kg body weight dissolved in olive oil) intraperitoneally. Extracellular matrix components were assayed; Masson's trichome staining of lung tissues was performed. Western blot analyses of matrix metalloproteases 2 and 9 were also carried out. Results: In comparison with the control animals, animals in which benzo(a)pyrene had induced lung cancer showed significant increases in extracellular matrix components such as collagen (hydroxy proline), elastin, uronic acid and hexosamine and in glycosaminoglycans such as hyaluronate, chondroitin sulfate, keratan sulfate and dermatan sulfate. The above alterations in extracellular matrix components were effectively counteracted in benzo(a)pyrene along with CAP supplemented animals when compared to benzo(a) pyrene alone supplemented animals. The results of Masson's trichome staining for collagen and of, immunoblotting analyses of matrix metalloproteases 2 and 9 further supported the biochemical findings. Conclusion: The apparent potential of CAP in modulating extracellular matrix components and proteases suggests that CAP plays a chemomodulatory and anti-cancer role working against experimentally induced lung carcinogenesis.
Complex Neural Classifiers for Power Quality Data Mining
Vidhya, S.,Kamaraj, V. The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.4
This work investigates the performance of fully complex- valued radial basis function network(FC-RBF) and complex extreme learning machine (CELM) based neural approaches for classification of power quality disturbances. This work engages the use of S-Transform to extract the features relating to single and combined power quality disturbances. The performance of the classifiers are compared with their real valued counterparts namely extreme learning machine(ELM) and support vector machine(SVM) in terms of convergence and classification ability. The results signify the suitability of complex valued classifiers for power quality disturbance classification.