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Moorthy, S. M.,Das, S. K.,Kar, N. B.,Urs, S. Raje Korean Society of Sericultural Science 2007 International Journal of Industrial Entomology Vol.14 No.2
The success of rearing with presently available conventional bivoltine is unpredictable in some seasons of the tropical regions due to highly fluctuating adverse climatic conditions. Thus, in order to popularize bivoltine breeds in tropical parts of India, it is very much essential to have a bivoltine breed(s), which can give stable cocoon crop under variable environments. With this objective a breeding programme was undertaken to improve the survival trait in bivoltine silkworm by introducing multivoltine genes into bivoltine through back crossing. Resultant bivoltine lines showed significantly higher survival in compared to the receptor (Bivoltine) parent and control bivoltine breed. Esterase isozyme analysis revealed similar banding pattern in the developed bivoltine and in the donor multivoltine, which predicts the introgression of multivoltine character into evolved bivoltine.
Moorthy, M.S.,Kim, H.B.,Sung, A.R.,Bae, J.H.,Kim, S.H.,Ha, C.S. Elsevier 2014 Microporous and mesoporous materials Vol.194 No.-
A new fluorescent mesoporous organosilicas bearing ethidium bromide in the framework was conveniently synthesized using 3-aminopropyltriethoxysilane as bridging organosilane functionality. Powder X-ray diffraction, N<SUB>2</SUB> sorption, transmission electron microscopy and scanning electron microscopy, and UV-visible absorption and fluorescence spectroscopy have been employed to characterize the materials. This material showed a selective monitoring of Hg<SUP>2+</SUP> and Fe<SUP>3+</SUP> ions with fluorescence quenching and visible color transition over a wide range of tested metal ions, which is due to the selective interactions of Hg<SUP>2+</SUP> and Fe<SUP>3+</SUP> ions with integrated functional groups at its pore wall framework. The experimental measurements reveal that the mesoporous organosilica material shows Hg<SUP>2+</SUP> and Fe<SUP>3+</SUP> ion selectivity upon addition of various concentrations of other competitive metal ions. Thus, the synthesized mesoporous organosilicas could monitor Hg<SUP>2+</SUP> and Fe<SUP>3+</SUP> ions in water and biological cells even in the trace amount.
Moorthy, S.M.,Krishnan, N.,Bhattacharya, Tanmay,Chaudhuri, A. Korean Society of Sericultural Science 2007 International Journal of Industrial Entomology Vol.15 No.2
A differential specific pattern of variation in the metabolism of protein and cholesterol was noticed in non -diapause and diapause eggs due to the significant differences in embryonic development. The rate of metabolism was different due to specific demands of such metabolites during active embryogenesis and maintenance of diapause respectively. In general, the metabolic rate was found to be accelerated in non- diapause eggs just after egg deposition, while it was very slow in diapause eggs. When the diapause eggs were treated with hydrochloric acid within 16-20 hrs, the rate of turnover was found to very similar to non- diapause eggs, though the base level of protein and cholesterol was recorded to be different.
Moorthy, S.M.,Das, S.K.,Mukhopadhyay, S.K.,Mandal, K.,Urs, S. Raje Korean Society of Sericultural Science 2007 International Journal of Industrial Entomology Vol.15 No.1
An indigenous multivoltine silkworm, Nistari was evaluated for their thermo tolerance by exposing the larvae to various temperature regimes for eight hours. Among different temperature exposed, this strain has significant tolerance at $32^{\circ}C$. Analysis of heat shock protein revealed the expression of 70 kDa and 64 kDa polypeptides in fat body and midgut tissues. Interestingly esterase isozyme pattern in midgut showed characteristic expression of Est-1 and Est-3 at different temperatures signifying role in heat and cold shock.
Moorthy, Madhappan Santha,Kim, Mi‐,Ju,Bae, Jae‐,Ho,Park, Sung Soo,Saravanan, Nagappan,Kim, Sun‐,Hee,Ha, Chang‐,Sik WILEY‐VCH Verlag 2013 European journal of inorganic chemistry Vol.2013 No.17
<P><B>Abstract</B></P><P>This paper reports a new approach towards the construction of a multifunctional periodic mesoporous organosilica (PMO), which integrates a range of advantages, such as mesoporous structural order, selective nucleobase‐recognition properties, stimuli‐responsive site‐specific delivery of anticancer agents to cancer tissues, and Cu<SUP>2+</SUP> adsorption, into a single entity. First, the appropriate organic‐functional‐receptor precursor was synthesized by a chemical process and used to fabricate a multifunctional pyridine‐containing PMO material (DMPy‐PMO) by a hydrolysis and condensation route. The designed organic–inorganic hybrid mesoporous silica chemosensor showed an intrinsic selective recognition of nucleobase, specifically thymidine, through multipoint hydrogen‐bonding interactions with suitably arrayed receptor sites loaded into the rigid silica framework. An in vitro cytotoxicity test showed that the designed chemosensor materials have good biocompatibility and, therefore, could be promising candidates for the delivery of a range of therapeutic agents. Confocal laser scanning microscopy (CLSM) confirmed that the material can be internalized effectively by cancer cells (MCF‐7 cells). In addition, the DMPy‐PMOs showed efficient Cu<SUP>2+</SUP> ion removal capacity at pH 5.0 with significantly high levels of adsorption (0.95 mmol g<SUP>–1</SUP>). These results suggest that the prepared multifunctional PMO hybrid has potential use as a smart material for a range of applications, such as biomolecule recognition, biomedical applications, and as an efficient adsorbent for the removal of metal ions.</P>
Ion-imprinted mesoporous silica hybrids for selective recognition of target metal ions
Moorthy, M.S.,Tapaswi, P.K.,Park, S.S.,Mathew, A.,Cho, H.J.,Ha, C.S. Elsevier 2013 Microporous and mesoporous materials Vol.180 No.-
A novel ion-imprinted functional ligand derivative bearing periodic mesoporous organosilica (IIPMO) was obtained using a sol-gel process from a chemically synthesized organopolysilane precursor with a metal template (Co<SUP>2+</SUP> ion) imprinted ligand centre with tetraethylorthosilicate (TEOS) and cetyltrimethylammoniumbromide (CTAB) as a structural directing surfactant under basic conditions. The imprinted metal template was easily leached out from the hybrid materials during an acid treatment, which resulted in a template-free ion-imprinted network in the PMO pore wall framework with an unaltered particle size and morphology. The ion-imprinted hybrid PMO materials were characterized by X-ray diffraction, Fourier transform-infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, solid-state <SUP>29</SUP>Si and <SUP>13</SUP>C cross polarization magic angle spinning nuclear magnetic resonance spectroscopy, N<SUB>2</SUB> adsorption-desorption analysis and elemental analysis. Furthermore, the removal of the imprinted metal template was confirmed by inductively coupled plasma-atomic emission spectroscopy. The selective rebinding ability of the template ions on the ion-imprinted PMO hybrid adsorbents was examined using a cobalt nitrate solution. The rebinding results showed that the selective efficiency of Co<SUP>2+</SUP> ions on the IIPMOs were 10.1, 7.4 and 9.3 for Cu<SUP>2+</SUP>, Cd<SUP>2+</SUP> and Zn<SUP>2+</SUP>, respectively.
Mesoporous organosilica hybrids with a tunable amphoteric framework for controlled drug delivery
Moorthy, Madhappan Santha,Park, Ji-Hye,Bae, Jae-Ho,Kim, Sun-Hee,Ha, Chang-Sik The Royal Society of Chemistry 2014 Journal of Materials Chemistry B Vol.2 No.38
<P>The chemical conversion of nitrile groups integrated in the pore wall frameworks of mesoporous organosilica hybrids (MSHs) into either carboxylic acid groups or amine groups by an acid or base hydrolysis method without altering the mesostructural order is suggested. By this approach, bifunctional derivatives could be produced in the silica pore walls. The nitrile groups integrated covalently into the pore walls of the mesoporous organosilica hybrids were converted to reactive functionalities, such as carboxylic acid (-COOH) or amine (-NH2) groups, by treatment with H2SO4or LiAlH4as the catalytic reagents. This facile approach allows the production of high amounts of either -COOH groups (3.26 mmol g<SUP>−1</SUP>) or amine (-NH2) groups (4.13 mmol g<SUP>−1</SUP>) into the pore walls of the mesoporous organosilica hybrids. The synthesised materials were characterised by X-ray diffraction, N2sorption isotherms, Fourier transform infrared spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM) and solid state<SUP>13</SUP>C cross-polarization magic angle spinning nuclear magnetic resonance spectroscopy (CP MAS NMR). Owing to the presence of hydrophilic basic diurea functional groups and -COOH or -NH2derivatives in the pore walls, the obtained samples could behave like bifunctional materials. The mesoporous organosilica hybrids with chemically derivatised carboxylic acid groups or amine functionalities in the pore wall frameworks were found to be suitable drug carriers for the controlled delivery of both hydrophilic (for example, 5-FU) and hydrophobic (<I>e.g.</I>IBU) drugs under an intracellular environment. The biocompatibility of the synthesised materials was also evaluated using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The cellular uptake was monitored by confocal laser scanning microscopy (CLSM). These results show that the synthesised materials have potential use as efficient carriers for drug delivery applications.</P>