Results 51 to 60 of about 1,540 (187)

Ochrobactrum sp. MPV1 from a dump of roasted pyrites can be exploited as bacterial catalyst for the biogenesis of selenium and tellurium nanoparticles [PDF]

, 2017
Background: Bacteria have developed different mechanisms for the transformation of metalloid oxyanions to non-toxic chemical forms. A number of bacterial isolates so far obtained in axenic culture has shown the ability to bioreduce selenite and tellurite
Dell'Anna R., Lampis S., Monti F., Piacenza E., Presentato A., Vallini G., Zonaro E.   +6 more
core   +1 more source

Some Anionic Organotellurium Complexes

, 1982
Chemistry Department, Lucknow University, Lucknow-226 007 Manuscript received 9 September 1981, accepted 23 May 1982 Complexes of the formulae [R4N]\(\frac{2}{2}\)+[C5H10TeI2X'2]2- and [R4N]+[p-C6H5 -OC6H4TeCl2X']- , where, R=CH2 , C2H5, C2H7 or C4H9; X'=I, Br or Cl, have been synthesised by refluxing a solution of 1-telluracyclohexane 1 : 1 diiodide ...
T. N. SRIVASTAVA, R. C. SRIVASTAVA, (Miss) M. SRIVASTAVA   +2 more
openaire   +1 more source

The Role of Chalcogen Bonding in Organic Dichalcogenides of Biological Interest

Chemistry – An Asian Journal, Volume 20, Issue 10, May 15, 2025.
Experimental and theoretical studies consistently show that selenium and tellurium in dichalcogenides compounds can function as efficient chalcogen bond (ChB) donors. Their electrophilic behavior may suggest that the formation of a ChB could represent the preliminary step of the molecular mechanism resulting in the anti‐redox activity of ...
Abhishek Tripathi, Miriam Calabrese, Andrea Pizzi, Arun Dhaka, Nicola Demitri, David R. Turner, Glen B. Deacon, Antonio Frontera, Giuseppe Resnati, Harkesh B. Singh   +9 more
wiley   +1 more source

Kumada‐Tamao Catalyst‐Transfer Condensation Polymerization of AB2 Monomer: Synthesis of Well‐Defined Hyperbranched Poly(thienylene‐phenylene)

Macromolecular Rapid Communications, Volume 46, Issue 9, May 2025.
Kumada‐Tamao catalyst‐transfer condensation polymerization of AB2 monomer in the presence of Ni(dppe)Cl2 in THF affords hyperbranched poly(thienylene‐phenylene) with a narrow molecular weight distribution and controlled molecular weight, which is close to the theoretical molecular weight calculated from the ratio of consumed AB2 monomer to Ni(dppe)Cl2.
Yoshihiro Ohta, Toshiki Hirota, Arisa Yamamoto, Tsutomu Yokozawa   +3 more
wiley   +1 more source

Isonitrile Photochemistry: A Functional Group Class Coming in from the Cold

Chemistry – A European Journal, Volume 30, Issue 64, November 15, 2024.
Isonitriles, often neglected for their unpleasant smell, have fascinated many generations of chemists thanks to unique reactivity modes. The present concept article, by retracing the seeds of isonitrile photochemistry, points out the hidden opportunities offered by visible light photo(redox) catalysis to promote key advancements in the field.
Mariateresa Giustiniano
wiley   +1 more source

Activity of Heterocyclic Tellurium Derivatives Against Opportunistic Bacteria

Журнал медико-биологических исследований
Antimicrobial resistance is a serious challenge for medicine and society as a whole. Among the bacteria that pose the greatest threat to human health due to their growing antibiotic resistance are Escherichia coli, Staphylococcus aureus and Salmonella ...
Ashura I. Israpilova, Aina A. Adieva, Albina M. Dzhafarova, Gasan M. Abakarov   +3 more
doaj   +1 more source

Selenium- and Tellurium-Based Antioxidants for Modulating Inflammation and Effects on Osteoblastic Activity

Antioxidants, 2017
Increased oxidative stress plays a significant role in the etiology of bone diseases. Heightened levels of H2O2 disrupt bone homeostasis, leading to greater bone resorption than bone formation. Organochalcogen compounds could act as free radical trapping
Xi Lu, Gemma Mestres, Vijay Pal Singh, Pedram Effati, Jia-Fei Poon, Lars Engman, Marjam Karlsson Ott   +6 more
doaj   +1 more source

Organotellurium(II) and ‐(IV) Compounds with Picolinoylbis(thioureas): From Simple 1 : 1 Adducts to Multimetallic Aggregates

European Journal of Inorganic Chemistry, Volume 27, Issue 29, October 11, 2024.
Bifunctional 2,6‐dipicolinoylbis(N,N‐diethylthioureas) (H2LEt) form tellurium compounds of a remarkable structural variety. Tellurium(IV) or tellurium(II) products are formed depending on the reaction conditions applied. The formation of heterobimetallic products is observed when transition metal ions are present in such reaction mixtures. They contain
Sailer S. dos Santos, Vania D. Schwade, Ernesto Schulz Lang, Chien Thang Pham, Maximilian Roca Jungfer, Ulrich Abram, Hung Huy Nguyen   +6 more
wiley   +1 more source

From small to large—The application of in situ polymerization within tumor cells

Aggregate, Volume 5, Issue 4, August 2024.
In situ polymerization within tumor cells can be achieved by chain‐reaction polymerization and step‐growth polymerization. The former is classified as light‐triggered, transition metals‐triggered, reactive oxygen species‐triggered, and enzyme‐triggered polymerization based on the mode of initiation, while the latter includes condensation polymerization
Mingjie Jia, Yonghang Liu, Peng Wei, Tao Yi   +3 more
wiley   +1 more source

SYNTHESIS OF NOVEL UNSATURATED ORGANOTELLURIUM COMPOUNDS WITH POTENTIAL BIOLOGICAL ACTIVITY

Acta Biomedica Scientifica, 2012
Efficient synthetic approaches to novel organotellurium. compounds with potential biologically activity were elaborated, based, on acetylenes and tellurium, tetrahalid.es.
M. V. Musalova, V. A. Potapov, S. V. Amosova   +2 more
doaj