In this review the phenomenon of proton conductivity in materials and the elements of proton conduction mechanismsproton transfer, structural reorganization and diffusional motion of extended moietiesare discussed with special emphasis on proton chemistry. This is characterized by a strong proton localization within the valence electron density of electronegative species (e.g., oxygen, nitrogen) and self-localization effects due to solvent interactions which allows for significant proton diffusivities only when assisted by the dynamics of the proton environment in Grotthuss and vehicle type mechanisms. In systems with high proton density, proton/proton interactions lead to proton ordering below first-order phase transition rather than to coherent proton transfers along extended hydrogen-bond chains as is frequently suggested in textbooks of physical chemistry. There is no indication for significant proton tunneling in fast proton conduction phenomena for which almost barrierless proton transfer is suggest...

Proton Conductivity: Materials and Applications

Effective removal of Cu (II) ions from aqueous solution by amino-functionalized magnetic nanoparticles.

Study on the adsorption of Cu(II) by EDTA functionalized Fe3O4 magnetic nano-particles

Biosorption of copper(II) by immobilizing Saccharomyces cerevisiae on the surface of chitosan-coated magnetic nanoparticles from aqueous solution.

Fresh water accounts for 3% of water resources on the Earth. Human and industrial activities produce and discharge wastes containing heavy metals into the water resources making them unavailable and threatening human health and the ecosystem. Conventional methods for the removal of metal ions such as chemical precipitation and membrane filtration are extremely expensive when treating large amounts of water, inefficient at low concentrations of metal (incomplete metal removal) and generate large quantities of sludge and other toxic products that require careful disposal. Biosorption and bioaccumulation are ecofriendly alternatives. These alternative methods have advantages over conventional methods. Abundant natural materials like microbial biomass, agro-wastes, and industrial byproducts have been suggested as potential biosorbents for heavy metal removal due to the presence of metal-binding functional groups. Biosorption is influenced by various process parameters such as pH, temperature, initial concentration of the metal ions, biosorbent dose, and speed of agitation. Also, the biomass can be modified by physical and chemical treatment before use. The process can be made economical by regenerating and reusing the biosorbent after removing the heavy metals. Various bioreactors can be used in biosorption for the removal of metal ions from large volumes of water or effluents. The recent developments and the future scope for biosorption as a wastewater treatment option are discussed.

/pdf/application-of-biosorption-for-removal-of-heavy-metals-from-2wwi5v412f.pdf

Application of Biosorption for Removal of Heavy Metals from Wastewater

Brahmi (Bacopa monnieri) is an important medhyarasayan plant and it is widely used in Indian traditional system of medicine for the improvement of memory/brain function. This medicinal herb is exploited from the wild population all over world so there is need to develop the in vitro protocol for the mass multiplication under various conditions and its conservation. The International Union for Conservation of Nature and Natural Resources (IUCN) has a long time ago listed B. monnieri as a threatened species. MS medium containing 8.9 μM BA was found most suitable for induction of high frequency shoot buds from different explants e.g., leaf and node. We had evaluated different concentration range (0.5-10%) of different carbon sources (sucrose, mannitol and glucose) for enhancement of this regeneration event. It was observed that MS media modified with 5% sucrose was found most effective for shoot bud induction and shoot regeneration from nodal explants and it ranges 22.6 shoots/explants and for leaf explant 3% sucrose was found effective with 20.6 shoots/explant. These shoots were further elongated on MS basal media without growth regulator. For getting maximum rooting these elongated shoots were transferred on MS media containing 4.9 μM IBA. The plantlets after acclimatization transferred into field with 90% survival rate. Thus the present study could be utilized for better multiplication and conservation of this important threatened species.

https://www.plantsjournal.com/archives/2017/vol5issue3/PartC/5-3-24-108.pdf

Effect of different carbon sources on in vitro regeneration of Brahmi Bacopa monnieri (L.) An important memory vitalizer

Metal(II) complexes of the compositions M(HL)Cl2 [M = Mn, Co, Zn, Cd, Hg], Ni(HL)2Cl2·4HS2O, Cu(HL)Cl2·3H2O, M(L)2·nH2O [M = Mn, Co, Ni, Cu, Zn] and the oxovanadium(IV) complex, VO(L)2, [HL = 2-acetylpyridine-2-furoylhydrazone] have been prepared and characterized Molar conductivities indicate non-electrolytic behaviour of the complexes Magnetic and spectral data such as infrared, electronic and ESR of the complexes are used to establish the stereochemistry and mode of bonding in these complexes

Studies on 2-Acetylpyridine-2-furoylhydrazone Complexes of Some Bivalent Transition Metal Ionsa

2-Acetylfuran-2-furoylhydrazone (1), [HL] reacts with metal ions to yield the complexes of two types, compounds [VO(HL)SO4] and M(HL)2Cl2 [M = CoII, NiII or CuII] and compounds M(L)2(H2O)2 [M = CoII, NiII or CuII], depending on the pH of the medium. These complexes have been characterized by elemental analyses, molar conductance, magnetic susceptibility, visible, e.s.r. and i.r. spectral studies. Square pyramidal geometry for [VO(HL)SO4] and octahedral geometry for the remaining complexes are proposed.

2-Acetylfuran-2-furoylhydrazone complexes of some 3d-metal ions

Cancer continues to be a worldwide killer, despite the enormous amount of research and rapid developments seen during the past decade. It has been suggested that by 2020 more than 15 million new cases of cancer will be diagnosed. Since it is commonly believed that many are preventable, there is urgent need to identify/develop natural medicines as effective chemopreventive agents. The purpose of this current study was to assess the effect of isolated and characterized salicin on cyclooxygenase (COX) proteins by molecular docking studies and by assessments of the effects of drug-ligand interaction. Salicin isolated from Desmodium gangeticum, a medicinal legume, is a COX inhibitor. The present study report the extraction, isolation and identification of salicin and its interaction with COX-1 and COX-2 derivatives, which may be useful for drug-designing for anti-cancer activities. Molecular modeling and docking studies revealed the binding orientations of salicin into the active sites of COX-1 and COX-2 enzymes. Extraction, isolation and characterization of the compound 2-(hydroxymethyl) phenyl hexopyranoside, also known as ‘salicin’, from the leaves of D. gangeticum first time. Anticancer evaluation of salicin in in vivo mice model.

https://www.longdom.org/open-access/screening-and-identification-of-salicin-compound-from-desmodium-gangeticum-and-its-in-vivo-anticancer-activity-and-docking-studies.pdf

Screening and Identification of Salicin Compound from Desmodium gangeticum and its In vivo Anticancer Activity and Docking Studies with Cyclooxygenase (COX) Proteins from Mus musculus

Exchange coupled structures of half metallic ferromagnets, Heusler Alloy (FM), Co2FeAl (CFA) and antiferromagnet (AF), NiO were fabricated by electron beam evaporation technique on n- and p-type Si substrates. These fabricated bilayer structures were further characterized for structural, morphological and magnetic point of views using x-ray diffraction (XRD), atomic/magnetic force microscopy (AFM/MFM) and vibrating sample magnetometer (VSM) techniques. Structural study shows the presence of CFA alloy and NiO phase. Surface morphology shows the granular feature of the top surface with grain size of 200–300 nm due to clustering of smaller grains. Smaller sized magnetic domains have been observed for the structures. Hysteresis behaviour of NiO/CFA/Si structures shows the ferromagnetic behaviour for in-plane orientation with negligible exchange bias whereas a significant exchange bias for out of plane orientation has been observed. The observed result could be understood due to surface roughness and arrangements of spins near the interface of ferromagnetic and anti-ferromagnetic layers.

P. C. Srivastava

Papers

Effect of different carbon sources on in vitro regeneration of Brahmi Bacopa monnieri (L.) An important memory vitalizer

Studies on 2-Acetylpyridine-2-furoylhydrazone Complexes of Some Bivalent Transition Metal Ionsa

2-Acetylfuran-2-furoylhydrazone complexes of some 3d-metal ions

Screening and Identification of Salicin Compound from Desmodium gangeticum and its In vivo Anticancer Activity and Docking Studies with Cyclooxygenase (COX) Proteins from Mus musculus

Magnetic and Structural Properties of Exchange Coupled Heusler Alloy NiO/Co 2 FeAl Interfaces with n -and p -TypeSilicon Substrates