Synthesis of New Brownmillerite Type Compounds Ba ₂(Sc, M')₂O₅ (M'=Lu, Yb, Tm or Er), Ba₂(Zn_1/2,M'_1/2)₂O₅ (M'=Ce, Zr or Hf), Ba₂(Zn_2/3, M'_1/3)₂O₅ (M'= Ta or Nb), and Ba₂(Zn_3/4W_1/4)₂O₅ and Their Crystal-Chemical Properties.

detection of volatile compounds of medicinal plants with some nano-sorbents using modified or new methodologies and investigation of antioxidant activity of their methanolic extracts

in this work, a novel and fast method for direct analysis of volatile compounds (davc) of medicinal plants has been developed by holding a filament from different parts of a plant in the gc injection port. the extraction and analysis of volatile components of a small amount of plant were carried out in one-step without any sample preparation. after optimization of temperature, extraction time a...

Ba3TM2Se9 (TM = Nb, Ta): synthesis and characterization of new polyselenides.

New ternary polyselenides Ba3TM2Se9 (TM = Nb, Ta) were synthesized through a solid-state reaction, and their structures were characterized using single-crystal X-ray diffraction. These compounds crystallized into a new structural type with a monoclinic space group P21/c. The structures were constructed from distorted, close-packed layers of ∞3[BaSe3]3.33– that incorporated TM atoms at octahedra...

cast or acrylic splints-their application in oral and maxillofacial surgery

چکیده ندارد.

Spotlight: Triphenylphosphine in conjunction with TCCA/ or NCBT/ or DDQ/ or DEAD provide practical and convenient systems for the synthesis of a wide range of organic compounds

Maryam Sadat Ghasemzadeh was born in Ghaen/ Southern Khorasan, Iran. She received her B.Sc. in Pure Chemistry from Imam Khomeini International University and M.Sc. in Organic Chemistry from Birjand University under the supervision of Professor Sara Sobhani. She is currently studying her Ph.D. in Ferdowsi University of Mashhad under the supervision of Professor Batool Akhlaghinia. Her current re...

Template-free synthesis and luminescent properties of hollow Ln:YOF (Ln = Eu or Er+Yb) microspheres