Synthesis of solid enantioselective macromer of trimesic acid for the enantiomeric separation of chiral alcohols

Ingole, Pravin G.,Bajaj, Hari C.,Singh, Kripal Techno-Press 2013 Advances in materials research Vol.2 No.1

Enantioselective macromer of trimesic acid was prepared using S(-) menthol with trimesoyl chloride on polyimide (PI) ultrafiltration membrane. The chemical composition of macromer as well as polyimide ultrafiltration membrane was determined by ATR-FTIR Spectroscopy. The optical resolution of chiral alcohols was performed in pressure driven process. The effect of monomer solutions concentration, effect of air-drying time of S(-) menthol solution, effect of reaction time, effect of operating pressure, effect of feed concentration of racemate on the performance of macromer was studied. The synthesised material exhibits separation of chiral alcohols (menthol ~23% and sobrelol ~21%).

Joint parameter identification of a cantilever beam using sub-structure synthesis and multi-linear regression

Ingole, Sanjay B.,Chatterjee, Animesh Techno-Press 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.45 No.4

Complex structures are usually assembled from several substructures with joints connecting them together. These joints have significant effects on the dynamic behavior of the assembled structure and must be accurately modeled. In structural analysis, these joints are often simplified by assuming ideal boundary conditions. However, the dynamic behavior predicted on the basis of the simplified model may have significant errors. This has prompted the researchers to include the effect of joint stiffness in the structural model and to estimate the stiffness parameters using inverse dynamics. In the present work, structural joints have been modeled as a pair of translational and rotational springs and frequency equation of the overall system has been developed using sub-structure synthesis. It is shown that using first few natural frequencies of the system, one can obtain a set of over-determined system of equations involving the unknown stiffness parameters. Method of multi-linear regression is then applied to obtain the best estimate of the unknown stiffness parameters. The estimation procedure has been developed for a two parameter joint stiffness matrix.

Role of functional nanoparticles to enhance the polymeric membrane performance for mixture gas separation

Ingole, Pravin G.,Baig, Muhammad Irshad,Choi, Wook,An, Xinghai,Choi, Won Kil,Lee, Hyung Keun Elsevier 2017 Journal of industrial and engineering chemistry Vol.48 No.-

<P><B>Abstract</B></P> <P>To improve the water vapor/gas separation the hydroxylated TiO<SUB>2</SUB> (OH-TiO<SUB>2</SUB>) nanopartilces have been synthesized and surface of polysulfone (PSf) hollow fiber membrane (HFM) has been coated as thin film nanocomposite (TFN) membranes. To remove the water vapor from mixture gas, hollow fiber membrane has been fabricated and while coating, the OH-TiO<SUB>2</SUB> nanoparticles have been incorporated in the <I>m</I>-phenylenediamine (MPD) solution to make TFN membrane. Aqueous MPD—OH-TiO<SUB>2</SUB> nanoparticles mix solutions and organic trimesoyl chloride (TMC) were used to prepare the TFN membranes on the surface of the PSf HFM substrate. Pristine TiO<SUB>2</SUB> surface was modified to initiate functional groups on the TiO<SUB>2</SUB> surface to increase the hydrophilicity of the nanoparticles. Fourier transform infrared (FT-IR) spectroscopy was used to confirm the hydroxylation of TiO<SUB>2</SUB> nanoparticles. The membranes were well characterized using different physicochemical characterization techniques. The membrane performances were evaluated based on water vapor permeance, selectivity, water vapor flux and water vapor removal efficiency. Obtained experimental results designated that the incorporated OH-TiO<SUB>2</SUB> nanoparticles were dispersed well while interfacial polymerization in the TFN layer and their addition enhanced membrane performances. With an increasing concentration of OH-TiO<SUB>2</SUB> nanoparticles from 0.025 to 0.2wt.% compare with MPD solution during the fabrication, water vapor permeance and selectivity significantly enhanced due to the amplified water vapor permeation corridors afforded by the modified OH-TiO<SUB>2</SUB> nanoparticles. After increasing the concentration of OH-TiO<SUB>2</SUB> more than 0.2wt.% in the monomer solution the agglomeration was started. The results revealed that the addition of modified hydroxylated TiO<SUB>2</SUB> in MPD solution up to 0.2w/w% (membrane sample TFN-4 (MT(0.5, 0.2)-OH-TiO<SUB>2</SUB>-0.2)) increased the permeate flux and showed the best permeance 1396 GPU and selectivity 510 among the all prepared membranes.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Hydrophilic functional TiO<SUB>2</SUB> NPs are synthesized to prepare TFN membranes. </LI> <LI> Interfacial interactions between MPD, TMC and OH-TiO<SUB>2</SUB> nanoparticles are studied. </LI> <LI> The incorporated 0.2wt.% OH-TiO<SUB>2</SUB> nanoparticles show superior results. </LI> <LI> The relationship between TNF morphology and performance is investigated. </LI> <LI> Tunable water vapor permeance and selectivity are achieved. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Structural joint modeling and identification: numerical and experimental investigation

Ingole, Sanjay B.,Chatterjee, Animesh Techno-Press 2015 Structural Engineering and Mechanics, An Int'l Jou Vol.53 No.2

In the present work, structural joints have been modeled as a pair of translational and rotational springs and frequency equation of the overall system has been developed using sub-structure synthesis. It is shown that using first few natural frequencies of the system, one can obtain a set of over-determined system of equations involving the unknown stiffness parameters. Method of multi-linear regression is then applied to obtain the best estimate of the unknown stiffness parameters. The estimation procedure has been developed first for a two parameter joint model and then for a three parameter model, in which cross coupling terms are also included. Two cases of structural connections have been considered, first with a cantilever beam with support flexibility and then a pair of beams connected through lap joint. The validity of the proposed method is demonstrated through numerical simulation and by experimentation.

Modifications of nutrient regime, chlorophyll-a, and trophic state relations in Daechung Reservoir after the construction of an upper dam

Ingole, Neha P.,An, Kwang-Guk The Ecological Society of Korea 2016 Journal of Ecology and Environment Vol.40 No.1

Background: Previous numerous studies on watershed scale demonstrated that the constructions of upper dams may influence the below dams due to modifications of flow regime and nutrient inputs. Little is known about how the dam constructions influence the downstream lakes or reservoirs in the regional scale. This study demonstrates how the construction of upper dam (i.e., Yongdam Dam) influences nutrient regime, trophic relations, and empirical models in Daechung Reservoir (DR). Yongdam Dam was constructed at the upstream region of DR in year 2000. Results: The analysis of hydrological variables showed that inflow and discharge in the DR were largely reduced after the year 2000. The construction of upper dam construction also resulted in increases of water temperature, pH and conductivity (as an indicator of ionic content) in the DR. Empirical models of TP-CHL and N:P ratio-CHL suggested that stronger responses of CHL to the phosphorus were evident after the upper dam construction, indicating that algal production at a unit phosphorus increased after the upper dam construction. Mann-Kendall tests on the relations of N:P ratios to TN showed weak or no relations ($t_{au}=-0.143$, z = -0.371, p = 0.7105) before the dam construction, while the relation of N:P ratios to TP showed strong in the periods of before- ($t_{au}=-0714$, z = -2.351, p = 0.0187) and after the construction ($t_{au}=-0.868$, z = -4.270, p = 0.0000). This outcome indicates that TP is key determinant on N:P ratios in the reservoir. Scatter Plots on Trophic State Index Deviations (TSIDs) of "TSI(SD) - TSI(CHL)" against "TSI(TP) - TSI(CHL)" showed that the dominance of clay turbidity or light limitation was evident before the upper dam construction [TSI(TP) - TSI(CHL) > 0 and TSI(SD) - TSI(CHL) > 0] and phosphorus limitation became stronger after the dam construction [(TSI(TP) - TSI(CHL) < 0 and TSI(SD) - TSI(CHL) > 0]. Conclusions: Overall, our analysis suggests that the upper dam construction modified the response of trophic components (phytoplankton) to the nutrients or nutrient ratios through the alteration of flow regime, resulting in modifications of ecological functions and trophic relations in the low trophic levels.

Modifications of nutrient regime, chlorophyll-a, and trophic state relations in Daechung Reservoir after the construction of an upper dam

Neha P. Ingole,안광국 한국생태학회 2016 Journal of Ecology and Environment Vol.40 No.1

Background: Previous numerous studies on watershed scale demonstrated that the constructions of upper dams may influence the below dams due to modifications of flow regime and nutrient inputs. Little is known about how the dam constructions influence the downstream lakes or reservoirs in the regional scale. This study demonstrates how the construction of upper dam (i.e., Yongdam Dam) influences nutrient regime, trophic relations, and empirical models in Daechung Reservoir (DR). Yongdam Dam was constructed at the upstream region of DR in year 2000. Results: The analysis of hydrological variables showed that inflow and discharge in the DR were largely reduced after the year 2000. The construction of upper dam construction also resulted in increases of water temperature, pH and conductivity (as an indicator of ionic content) in the DR. Empirical models of TP-CHL and N:P ratio-CHL suggested that stronger responses of CHL to the phosphorus were evident after the upper dam construction, indicating that algal production at a unit phosphorus increased after the upper dam construction. Mann-Kendall tests on the relations of N:P ratios to TN showed weak or no relations (tau = −0.143, z = −0.371, p = 0.7105) before the dam construction, while the relation of N:P ratios to TP showed strong in the periods of before- (tau = −0714, z = −2.351, p = 0.0187) and after the construction (tau = −0.868, z = −4.270, p = 0.0000). This outcome indicates that TP is key determinant on N:P ratios in the reservoir. Scatter Plots on Trophic State Index Deviations (TSIDs) of “TSI(SD) - TSI(CHL)” against “TSI(TP) - TSI(CHL)” showed that the dominance of clay turbidity or light limitation was evident before the upper dam construction [TSI(TP) - TSI(CHL) > 0 and TSI(SD) - TSI(CHL) > 0] and phosphorus limitation became stronger after the dam construction [(TSI(TP) - TSI(CHL) < 0 and TSI(SD) - TSI(CHL) > 0]. Conclusions: Overall, our analysis suggests that the upper dam construction modified the response of trophic components (phytoplankton) to the nutrients or nutrient ratios through the alteration of flow regime, resulting in modifications of ecological functions and trophic relations in the low trophic levels.

Viral Coat Protein Analysis of a Polydnavirus, Cotesia plutellae Bracovirus, by a Tandem Mass MALDI-TOF

Nitin V.Ingole,Yonggyun Kim 한국응용곤충학회 2012 한국응용곤충학회 학술대회논문집 Vol.2012 No.05

A polydnavirus, Cotesia plutellae bracovirus (CpBV), is symbiotic to an endoparasitoid wasp, C.plutellae, which specifically parasitizes young larvae of the diamondback moth, Plutella xylostella. A recent study on CpBV replication by analysis of ovary transcriptome of C.Plutellae suggests several candidate coat protein genes. This study was conducted to confirm the coat protein genes by analyzing coat proteins of CpBV viral particles by a tandem mass MALDI-TOF. Immunoprecipitation of ovary protein extract with a polyclonal CpBV antibody captured three proteins named as p35, p60, and p70. More number of coat proteins were resolved in a protein extract directly from viral particles. All candidate coat proteins are analyzed in amino acid sequences by MALDI-TOF. A comprehensive analysis of viral proteomics and ovary transcriptome determined novel viral coat proteins from CpBV

Adsorption of Phenol onto Banana Peels Activated Carbon

Ramakant S. Ingole,Dilip H. Lataye,Prashant T. Dhorabe 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.1

The present paper reports adsorption of phenol onto Banana Peels Activated Carbon (BPAC). The effect of adsorbent dose (m), initial pH (pH0), contact time (t), initial phenol concentration (Co) and temperature (T) on the adsorption of phenol has been studied using batch experiments. The study revealed that about 83% phenol gets removed at an initial concentration of 50 mg/l, whereas the removal is 60% at an initial concentration of 500 mg/l. The phenol uptake of 6.98 and 48.58 mg per gram of BPAC at respective concentrations was found at an optimum dose of 6 g/l at 303 K. The optimum pH and contact time were found to be 6 and 60 minutes respectively. The pseudo second order kinetic model found best representing the kinetic study. Toth and Redlich-Peterson models were found best suited for describing the adsorption equilibrium data. From thermodynamic study it is confirmed that, phenol adsorption decreases with increase in temperature and is spontaneous and exothermic in nature.

Joint parameter identification of a cantilever beam using sub-structure synthesis and multi-linear regression

Sanjay B. Ingole,Animesh Chatterjee 국제구조공학회 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.45 No.4

Complex structures are usually assembled from several substructures with joints connecting them together. These joints have significant effects on the dynamic behavior of the assembled structure and must be accurately modeled. In structural analysis, these joints are often simplified by assuming ideal boundary conditions. However, the dynamic behavior predicted on the basis of the simplified model may have significant errors. This has prompted the researchers to include the effect of joint stiffness in the structural model and to estimate the stiffness parameters using inverse dynamics. In the present work, structural joints have been modeled as a pair of translational and rotational springs and frequency equation of the overall system has been developed using sub-structure synthesis. It is shown that using first few natural frequencies of the system, one can obtain a set of over-determined system of equations involving the unknown stiffness parameters. Method of multi-linear regression is then applied to obtain the best estimate of the unknown stiffness parameters. The estimation procedure has been developed for a two parameter joint stiffness matrix.

Role of functional nanoparticles to enhance the polymeric membrane performance for mixture gas separation

Pravin G. Ingole,Muhammad Irshad Baig,최욱,Xinghai An,최원길,이형근 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.48 No.-

To improve the water vapor/gas separation the hydroxylated TiO2 (OH-TiO2) nanopartilces have beensynthesized and surface of polysulfone (PSf) hollowfiber membrane (HFM) has been coated as thinfilmnanocomposite (TFN) membranes. To remove the water vapor from mixture gas, hollowfiber membranehas been fabricated and while coating, the OH-TiO2 nanoparticles have been incorporated in the mphenylenediamine(MPD) solution to make TFN membrane. Aqueous MPD—OH-TiO2 nanoparticles mixsolutions and organic trimesoyl chloride (TMC) were used to prepare the TFN membranes on the surfaceof the PSf HFM substrate. Pristine TiO2 surface was modified to initiate functional groups on the TiO2surface to increase the hydrophilicity of the nanoparticles. Fourier transform infrared (FT-IR)spectroscopy was used to confirm the hydroxylation of TiO2 nanoparticles. The membranes were wellcharacterized using different physicochemical characterization techniques. The membrane performanceswere evaluated based on water vapor permeance, selectivity, water vaporflux and water vaporremoval efficiency. Obtained experimental results designated that the incorporated OH-TiO2 nanoparticleswere dispersed well while interfacial polymerization in the TFN layer and their additionenhanced membrane performances. With an increasing concentration of OH-TiO2 nanoparticles from0.025 to 0.2 wt.% compare with MPD solution during the fabrication, water vapor permeance andselectivity significantly enhanced due to the amplified water vapor permeation corridors afforded by themodified OH-TiO2 nanoparticles. After increasing the concentration of OH-TiO2 more than 0.2 wt.% in themonomer solution the agglomeration was started. The results revealed that the addition of modifiedhydroxylated TiO2 in MPD solution up to 0.2 w/w% (membrane sample TFN-4 (MT(0.5, 0.2)-OH-TiO2-0.2))increased the permeateflux and showed the best permeance 1396 GPU and selectivity 510 among the allprepared membranes.