02337nas a2200277   4500008004100000022001400041245013100055210006900186260007400255300001400329490000700343520130900350653001801659653001301677653002401690653002101714653001801735100003101753700002701784700002901811700002001840700002401860700002501884700002601909856012401935       2011                        eng d  a1022-976000aPreparation and characterization of magnetic nanoparticles embedded in hydrogels for protein purification and metal extraction0 aPreparation and characterization of magnetic nanoparticles embed  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcNOV  a2285-22940 v183 a<p>The present work involves the development of hydrogel magnetic nanocomposites for protein purification and heavy metal extraction applications. The magnetic nanoparticles (MNPs) were prepared in situ in poly(acrylamide)-gum acacia (PAM-GA) hydrogels. The formation of magnetic nanoparticles in the hydrogel networks was confirmed by Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). Scanning electron (SEM) microscopy studies revealed the formation of MNPs throughout the hydrogel networks. The average size of MNPs formed in the hydrogel networks was 3-5 nm as determined by transmission electron microscopy (TEM). The thermal properties of the hydrogel magnetic nanocomposites were evaluated by dynamic scanning calorimetry (DSC) and thermogravimetric (TG) analysis. The magnetic properties of the developed hydrogel magnetic nanocomposites were determined by a vibrating sample magnetometer (VSM). The swelling properties of the hydrogel and the hydrogel magnetic nanocomposites were studied in detail. The hydrogel magnetic nanocomposites are utilized for the removal of toxic metal ions such as Co(II), Ni(II), and Cu(II) and for protein purification. The results confirm that the hydrogel magnetic nanocomposites exhibit superior extraction properties to hydrogels.</p>10aBioseparation10aHydrogel10amagnetic properties10aMetal absorption10aNanocomposite1 aNagireddy, Narayana, Reddy1 aYallapu, Murali, Mohan1 aKokkarachedu, Varaprasad1 aSakey, Ravindra1 aKanikireddy, Vimala1 aAlias, Joy, Pattayil1 aKonduru, Mohana, Raju  uhttps://library.ncl.res.in/content/preparation-and-characterization-magnetic-nanoparticles-embedded-hydrogels-protein-002103nas a2200229   4500008004100000022001400041245004000055210004000095260000900135300001600144490000800160520139800168100002501566700002301591700002001614700004901634700003201683700002701715700002501742700003101767856007501798       2015                        eng d  a1932-744700aChemically chargeable photo battery0 aChemically chargeable photo battery  cJUN   a14010-140160 v1193 a<p>Here we show a surrogate strategy for power production, wherein light is used to actuate a discharge Chemistry in the cathode of an aqueous rechargeable battery (ARB). The proposed photo battery consists of a titaninm nitride photoanode, promising. cathode:material iron(III) hexacyanoferrate(II) as the battery active species, and Na2S2O8 as the chemical charging agent The photo battery delivered negligible capacity in the dark and the capacity shot up to 77.8 mAh/g when artificially shined light, confirming that the battery chemistry is light driven. In the ambient light, the device retained 72% of its artificial light discharge capacity with a stable cycling for more than 100 cycles. Further, an unprecedented means for charging the battery rapidly is presented using Na2S2O8 and it revitalized the battery in 30 s without any external bias. This methodology of expending a photoanode extends to a battery that is free from dissolution of active materials, irreversible structural changes, spontaneous deinsertion reactions, and safety concerns commonly encountered in the state of the art anode materials in ARBs. Apart from bringing out a sustainable way for power production, this device opens up avenues for charging the battery in the likely events of electrical input unavailability, while solving the critcial issues of longer charging time and higher charging voltage.</p>1 aThimmappa, Ravikumar1 aPaswan, Bhuneshwar1 aGaikwad, Pramod1 aDevendrachari, Mruthyunjayachari, Chattanaha1 aKotresh, Harish, Makri Nimb1 aMohan, Ramsundar, Rani1 aAlias, Joy, Pattayil1 aThotiyl, Musthafa, Ottakam  uhttps://library.ncl.res.in/content/chemically-chargeable-photo-battery