Search results for "Smut"
showing 10 items of 493 documents
Understanding distortions of inorganic substructures in chloridobismuthates(III)
2021
The molar ratio variations of organic and inorganic reactants of chloridobismuthates(III) with N,N-dimethylethane-1,2-diammonium, [(CH3)2NH(CH2)2NH3]2+, and N,N,N′,N′-tetramethylguanidinium, [NH2C{N(CH3)2}2]+, cations lead to the formation of four different products, namely, tris(N,N-dimethylethane-1,2-diammonium) bis[hexachloridobismuthate(III)], [(CH3)2NH(CH2)2NH3]3[BiCl6]2 (1), catena-poly[N,N-dimethylethane-1,2-diammonium [[tetrachloridobismuthate(III)]-μ-chlorido]], {[(CH3)2NH(CH2)2NH3][BiCl5]} n (2), tris(N,N,N′,N′-tetramethylguanidinium) tri-μ-chlorido-bis[trichloridobismuthate(III)], [NH2C{N(CH3)2}2]3[Bi2Cl9] (3), and catena-poly[N,N,N′,N′-tetramethylguanidinium [[dichloridobismutha…
An interpretation of EPR spectra of azide ligated superoxide dismutase from Propionibacterium shermanii
1995
A self-consistent description of the EPR spectra of the azide ligated SOD is obtained by taking into account the general configuration of the crystal field splitting in the crystal field Hamiltonian. The spread in the rhombicity parameter due to the presence of different conformational substates is introduced.
Copper(II) Polyamine Complexes withN-Benzothiazole Sulfonamides as Counterions — Synthesis, Crystal Structures, and Properties of [Cu(dien)2](L1)2[HL…
2003
Copper(II) complexes of new N-benzothiazole sulfonamides (HL1= N-2-(benzothiazole)naphtalensulfonamide and HL2 = N-2-(6-chlorobenzothiazole)toluenesulfonamide) with ethylenediamine (en) and diethylenetriamine (dien) have been synthesized and characterised. The crystal structures of [Cu(dien)2](L1)2 (1) and [Cu(en)2(H2O)2](L2)2 (2) compounds have been determined. The metal centre adopts a “4+2” distorted octahedral environment in both complexes. Unusually, the sulfonamidate anions act as counterions. Spectroscopic properties are in good agreement with the crystal structures. The superoxide dismutase (SOD)-like activity of complex 2 has been tested. Kupfer(II)-Polyamin-Komplexe mit N-Benzothi…
The active center of superoxide dismutase from Propionibacterium shermanii
1996
A self-consistent description of the EPR spectra and of the Mossbauer spectra of the natural superoxide dismutase from Propionibacterium shermanii with ferric iron as an active centre is presented. The spectra were measured at pH 6.5, 7.8 and 9.4. The theoretical approach is based on the use of the complete crystal field Hamiltonian for the high-spin ferric complexes with due regard for the terms of the fourth power of the electronic spin. It is shown that a SOD molecule can exist in two conformations. The low-pH conformation has predominantly trigonal symmetry, while the high-pH conformation has the symmetry close to the «extreme rhombic». This interpretation is in full agreement with EXAF…
Squaraine Dyes for Photodynamic Therapy: Mechanism of Cytotoxicity and DNA Damage Induced by Halogenated Squaraine Dyes Plus Light (>600 nm)¶
2004
Halogenated squaraine dyes 1 and 2 possess favorable photophysical and in vitro photobiological properties that make these new class of molecules interesting for photodynamic therapeutic applications. For a better understanding of the mechanism of their photobiological activity, we have analyzed the DNA damage and the cytotoxicity induced by these photosensitizers in mammalian cells and cell-free systems in the presence and absence of various additives and scavengers. Both photoactivated squaraines were found to be similar efficient in inducing single-strand breaks (SSB) in cell-free DNA when compared with the cellular DNA. Superoxide dismutase and catalase did not show any influence. Howev…
OZONE THERAPY: MECHANISMS OF ACTION, RECENT LITERATURE AND NEWLY DISCOVERED BIOCHEMICAL PATHWAYS
2018
Ozone therapy is widely used in many countries since many years. Recently, the increasing widespread of this complementary therapy has been accomplished by an increased number of basic and clinic papers published on international journals. This lecture will deal on the first approach by a pharmacological point of view in the aim to characterize the mechanisms activated at sub-cellular level by ozone when used for medical and beauty application at low graded doses. The first theory was based upon the fact that the exposure to low, non-toxic, ozone concentrations could increase the efficacy of the endogenous antioxidant system by increasing the production or the activity of some enzymes exert…
Bismuta halkogenīdu plānu kārtiņu secīgās sintēzes pielietojumiem termoelektriskajās ierīcēs un to īpašību izpēte
2018
Bismuta halkogenīdi kā Bi2Se3 un Bi2Te3, pašreiz tiek īpaši aktīvi pētīti, jo nesen tika atklāts, ka bez izcilām termoelektriskajām (TE) īpašībām, tiem piemīt arī topoloģiskās īpašības. Topoloģiskie izolatori ir materiāli, kuri tilpumā ir elektriskie izolatori, bet uz virsmas tiem ir vadoši stāvokļi, kas paver iespējas termoelektriskās efektivitātes paaugstināšanā. Šajā darbā tika sintezētas Bi2Se3 un Bi2Te3 plānās kārtiņas, kā arī tās tika secīgi sintezētas viena uz otras, izmantojot fizikālo tvaiku nogulsnēšanās metodi. Pārklājumiem tika noteiktas elektriskās un TE īpašības, kā arī tika noteikts paraugu biezums, morfoloģija un sastāvs. Secīgi sintezētu kārtiņu īpašības tika salīdzinātas a…
Helicobacter pylori standarta trīskāršās klaritromicīnu saturošās un alternatīvās augstu devu amoksicilīnu un bismutu saturošās eradikācijas terapiju…
2020
Ievads. Antibakteriālā terapija ir standarta terapija H. pylori infekcijas eradikācijai. Standarta trīskāršā terapija sastāv no divu veidu antibakteriāliem preparātiem un nereti šī kombinācija izraisa plašu blakusparādību spektru, samazinot pacientu vēlmi turpināt terapiju, infekcijas izārstēšanas iespējamību, kā arī palielina rezistences veidošanās risku. Klaritromicīna rezistence šobrīd pasaulē ir augsta, bet Latvijā tā ir 5,7 %. Darba mērķis. Salīdzināt standarta trīskāršās H. pylori eradikācijas terapijas ar klaritromicīnu un alternatīvās augstu devu amoksicilīna / bismuta subcitrāta eradikācijas efektivitāti un terapijas blakusparādību spektru. Materiāli un metodes. Prospektīvs randomi…
CCDC 930933: Experimental Crystal Structure Determination
2016
Related Article: Mark Feyand, Enrico Mugnaioli, Frederik Vermoortele, Bart Bueken, Johannes M. Dieterich, Tim Reimer, Ute Kolb, Dirk de Vos, Norbert Stock|2012|Angew.Chem.,Int.Ed.|51|10373|doi:10.1002/anie.201204963
Antioxidant properties, superoxide dismutase and glutathione reductase activities in HepG2 cells with a fungal endophyte producing apigenin from pige…
2012
Abstract A fungal endophyte MD89 with obvious antioxidant activities was isolated from pigeon pea and identified as Chaetomium globosum by ITS sequence. Different fractions from MD89 culture were compared and evaluated by total phenol (TP) content, total flavonoid (TFL) content, DPPH radical scavenging, reducing power and lipid peroxidation assays, respectively. Results showed that EtOAc extracts had high content of TP and TFL, and strong antioxidant activities (IC 50 value was 6.87, 15.19, 16.78 μg/mL, respectively). Furthermore, the EtOAc extracts were analyzed by LC–MS/MS and a good antioxidant compound, apigenin, was found. The activities of superoxide dismutase (SOD) and glutathione re…