scholarly journals KORONA/CORONA IN THE DERIVATIVE SYSTEM OF MODERN LANGUAGES

2020 ◽  
pp. 840
Author(s):  
R. G. Gataullin
Keyword(s):  
Derivative System

Dechlorination of DDT catalyzed by visible-light-driven system composed of vitamin B12 derivative and Rhodamine B

2013 ◽  
Vol 17 (01n02) ◽  
pp. 135-141 ◽  
Author(s):  
Keishiro Tahara ◽  
Kumiko Mikuriya ◽  
Takahiro Masuko ◽  
Jun-ichi Kikuchi ◽  
Yoshio Hisaeda
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Rhodamine B ◽  
Cobalt Complex ◽  
Light Irradiation ◽  
Vitamin B ◽  
Free Process ◽  
Driven System ◽  
Derivative System ◽  
Visible Light Driven

The visible-light-driven dechlorination of 1,1-bis(4-chlorophenyl)-2,2,2-trichloroethane (DDT) was carried out in the presence of a hydrophobic vitamin B12 , heptamethyl cobyrinate perchlorate and Rhodamine B . DDT was successfully dechlorinated to form 1,1-bis(4-chlorophenyl)-2,2-dichloroethane (DDD) as the mono-dechlorinated product upon visible light irradiation with a tungsten lamp (λ > 440 nm). Upon prolonged visible light irradiation to DDT, DDMU (1-chloro-2,2-bis(4-chlorophenyl)ethylene), DDMS (1-chloro-2,2-bis(4-chlorophenyl)ethane) and DCS (trans-4,4′-dichlorostilbene) were obtained as the di- and tri-dechlorinated products. The use of the photostable organic sensitizer enabled prolonged photocatalysis via a noble-metal-free process. The vitamin B12 derivative was replaced by an imine/oxime-type cobalt complex although the cobalt complex system showed a lower catalytic activity than the B12 derivative system. The dechlorination mechanism in the B12 -Rhodamin B system was investigated by various methods such as UV-vis absorption and fluorescence quenching.

Structure–activity relationship disturbed by a solvolytic process: Study on the [Cu(II)-4-nitropyridine N-oxide derivative] system

Polyhedron ◽  
2013 ◽  
Vol 50 (1) ◽  
pp. 146-153 ◽  
Author(s):  
Aniela Puszko ◽  
Andrzej Kochel ◽  
Joanna Wietrzyk ◽  
Beata Filip-Psurska ◽  
Julia Jezierska ◽  
...  
Keyword(s):  
Structure Activity Relationship ◽  
Activity Relationship ◽  
Process Study ◽  
Structure Activity ◽  
Derivative System ◽  
Oxide Derivative

Influence of symmetric benzene–polycarboxylate acids on the structures of silver-aminopyrimidyl derivative system

2010 ◽  
Vol 13 (1) ◽  
pp. 10-14 ◽  
Author(s):  
Geng-Geng Luo ◽  
Di Sun ◽  
Na Zhang ◽  
Qin-Juan Xu ◽  
Li-Rong Lin ◽  
...  
Keyword(s):  
Derivative System

scholarly journals Hepatocellular carcinoma and impact of aflatoxin difuranocoumarin derivative system: A case report

2016 ◽  
Vol 144 (11-12) ◽  
pp. 661-663 ◽  
Author(s):  
Miroslav Ilic ◽  
Srdjan Putnik ◽  
Natasa Prvulovic-Bunovic ◽  
Mirjana Vojinovic-Miloradov ◽  
Ivana Mihajlovic ◽  
...  
Keyword(s):  
Hepatocellular Carcinoma ◽  
Aflatoxin B1 ◽  
Enzyme Linked Immunosorbent Assay ◽  
Western Balkans ◽  
Liver Malignancy ◽  
Genetic Changes ◽  
System A ◽  
Derivative System ◽  
The Impact ◽  
Milk And Dairy Products

Introduction. Hepatocellular carcinoma (HCC) is the most frequent type of liver malignancy. As a carcinogen, aflatoxin B1 (AFB1) causes HCC by inducing deoxyribonucleic acid adducts that lead to genetic changes in liver cells and may be the cause of HCC in up to 30% of cases. The incidence of HCC has been on the rise and is an issue in the countries of the Western Balkans. Case Outline. This paper presents a case of a 37-year-old woman who was diagnosed with HCC, without hepatitis B, hepatitis C, or liver cirrhosis. The patient consumed milk and dairy products in quantities of over two liters per day over the course of 20 years, which indicates the impact of aflatoxin in milk on HCC. A positive signal for the presence of AFB1 was detected by ELISA (enzyme-linked immunosorbent assay) in-house using immunoperoxidase screening test. Conclusion. As carcinogenic difuranocoumarin derivative, aflatoxin B1 is the most likely cause of malignant transformation of hepatocytes, which resulted in hepatocellular carcinoma in this patient.

scholarly journals The Role of the CH/π Weak Interaction in the Geometrical Conformation: An Aromatic Acetamide Derivative System as an Example

2017 ◽  
Vol 56 (3) ◽  
Author(s):  
José-Zeferino Ramírez ◽  
Rubicelia Vargas ◽  
Itzia I. Padilla-Martínez ◽  
Anaid G. Flores-Huerta ◽  
Jorge Garza
Keyword(s):  
Density Functional ◽  
Basis Set ◽  
Conformational Search ◽  
Dft Methods ◽  
Theoretical Methods ◽  
Exchange Correlation ◽  
Dispersion Effects ◽  
Starting Point ◽  
Derivative System ◽  
The Many

In this work, three conformers of an aromatic amide derivative are theoretically analyzed. The theoretical methods used were based on the Kohn-Sham version of the density functional theory, considering three exchange-correlation functionals of different types: PBE, TPSS and B3LYP. The results obtained using these methods were compared to those obtained by the many-body perturbation theory to second order (MP2). All these methods where coupled with the 6-311++G(d,p) basis set. The X-ray structure was used as a starting point in the conformational search, as all the methods considered in this work had predicted that this structure would be the conformer with the highest energy, thus obtaining the first important result for this system. The second most important result discovered in this work refers to the large differences found in the predicted structures when applying DFT methods, as compared to the MP2 method. We attribute such differences to dispersion terms not included in the exchangecorrelation functionals considered; such a hypothesis is corroborated when a model system (stabilized by dispersion effects) is analyzed by applying the four theoretical methods. By incorporating dispersion effects with the exchange-correlation functional, we found they compared more favorably with the wave-function correlated method.

A canonical Hamiltonian analysis of Podolsky’s generalized electrodynamics in first-order formalism

2021 ◽  
Vol 36 (10) ◽  
pp. 2150068
Author(s):  
Jialiang Dai
Keyword(s):  
Degrees Of Freedom ◽  
Gauge Condition ◽  
Quantization Scheme ◽  
Constrained System ◽  
First Order ◽  
Higher Derivative ◽  
Gauge Fixing ◽  
Derivative System ◽  
New Variables ◽  
Hamiltonian Analysis

We give a canonical Hamiltonian analysis of Podolsky’s generalized electrodynamics by introducing two sets of new variables which help us transform the Lagrangian into an equivalent first-order formalism. After eliminating the unphysical sector, we calculate the physical degrees of freedom of the higher derivative system and obtain the Dirac brackets in the reduced phase space. Then with the aid of the first-class constraints, we construct the independent gauge generator which is closely connected with the BRST charge and the BRST-invariant Hamiltonian. Finally, by choosing appropriate gauge-fixing fermion, we evaluate the path integral of this higher derivative constrained system in BRST quantization scheme with the generalized Lorenz gauge condition.

STOLAINE CASSIDINES (COLEOPTERA, CHRYSOMELIDAE) WITH Xyp SEX CHROMOSOMES AND A DERIVATIVE SYSTEM XpneoXneoYp

1974 ◽  
Vol 16 (2) ◽  
pp. 433-440 ◽  
Author(s):  
E. S. de Vaio ◽  
A. Postiglioni
Keyword(s):  
Chromosome Number ◽  
Sex Chromosomes ◽  
High Chromosome Number ◽  
Multiple Sex Chromosomes ◽  
Autosome Translocation ◽  
Derivative System ◽  
Very High

Three species of Cassidines were cytologically studied. Chelymorpha indigesta and C. variabilis, with 10II + Xyp, have a relatively primitive Coleopteran karyotype and the sex chromosomes form a parachute-like bivalent. Botanochara angulata, belonging to the same tribe, Stolaini, presents an exceptional karyotype with a very high chromosome number (2n = 51 ♀) and multiple sex chromosomes XpneoXneoYp. This system has derived from the Xyp by a yp-to-autosome translocation.

Earthen Long Barrows and Timber Structures: Aspects of the Early Neolithic Mortuary Practice in Denmark

1979 ◽  
Vol 45 ◽  
pp. 301-320 ◽  
Author(s):  
Torsten Madsen
Keyword(s):  
Northern Europe ◽  
Timber Structures ◽  
Early Neolithic ◽  
Mortuary Practice ◽  
Radiocarbon Dates ◽  
Clear Cut ◽  
Derivative System ◽  
The Many ◽  
Neolithic Cultures ◽  
Early Phases

More than twenty years have elapsed since Stuart Piggott suggested the possibility of a connection between the primary Neolithic cultures of Britain and the early phases of the Funnel necked Beaker (TRB) Culture of northern Europe (Piggott 1956). What appeared at that time to many scholars, not least in Denmark, to be a very far fetched idea, must today in the light of the many new Danish excavations be considered seriously. Piggott pointed to three categories of finds which could possibly be advanced as indicators of contact: Pottery, causewayed camps and ‘unchambered’ earthen long barrows. In all three areas decisive new results have been obtained, and although this paper deals with the earthen long barrows, both the pottery and the causewayed camps will be briefly commented upon.C. J. Becker's division of the Danish early Neolithic pottery into four major classes, the A, B, non-megalithic and megalithic C types of pottery, is still useable for the general categorization of site inventories (Becker 1948). The neat derivative system that he built, with A originating somewhere in eastern Europe, followed by B, and terminating with two contemporary C-groups, is however no longer warranted, and especially not with reference to the radiocarbon dates. Nor can the clear-cut typological division of the pottery into the four groups be maintained, since many types of pots and ornamentation occur in more than one group. For instance the B type beaker, with lines of twisted cord beneath the rim, is an integral part of the inventory of non-megalithic C sites, and also occurs in connection with megalithic C pottery.

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