Results 101 to 110 of about 25,433 (194)

The EUROmediCAT Network and Databases: A Resource for Pharmacovigilance in Pregnancy

open access: yesPharmacoepidemiology and Drug Safety, Volume 35, Issue 5, May 2026.
ABSTRACT Background The evidence gap relating to the risk of congenital anomalies (CA) associated with first trimester medication exposure in pregnancy is well recognized. Aims We describe the EUROmediCAT network and databases, and the methodological approach to pregnancy pharmacovigilance.
Helen Dolk   +27 more
wiley   +1 more source

Modeling The Physicochemical Characteristics of Benzene Compounds Through the Application of Zagreb Omicron Indices

open access: yesCumhuriyet Science Journal
The examination of quantitative structure-property relationship (QSPR) paradigms uses topological indices to explain the chemical and physical properties of molecular entities. In the current study, the analysis primarily focused on the omicron degree of
İdris Çiftçi
doaj   +1 more source

The Zagreb indices 30 years after [PDF]

open access: yesCroatica chemica acta, 2003
The original formulation of the Zagreb indices is presented and their relationship to topological indices such as self-returning walks, Platt, Gordon-Scantlebury and connectivity indices is discussed. Their properties are also listed. Modified Zagreb indices are introduced and the Zagreb complexity indices reviewed.
Nikolić, Sonja   +3 more
openaire   +4 more sources

Demographic and Structural Variability Modulate Growth Dynamics in European Beech Primary Forests

open access: yesGlobal Change Biology, Volume 32, Issue 5, May 2026.
Climate change is increasing drought and heat stress on European beech (Fagus sylvatica L.), causing widespread tree vitality losses and growth declines across Europe. Using a large tree ring network from montane primary beech forests, we found that trees of various ages and sizes respond differently to climate warming, leading to contrasting within ...
Krešimir Begović   +13 more
wiley   +1 more source

Entropy measures of dendrimers using degree based indices

open access: yesSouth African Journal of Chemical Engineering
Topological indices play a crucial role as molecular descriptors in QSAR/QSPR research. Graph entropy measurements are of great importance in various fields like chemistry, discrete mathematics, and biology.
Ali Ovais   +4 more
doaj   +1 more source

Bounds for Zagreb indices

open access: yes, 2017
Let \(G\) be a graph with vertex set \(V(G)\) and edge set \(E(G)\). Let \(d_i\) be the degree of the vertex \(v_i \in V(G)\). The first and second Zagreb indices, \(M_1 = \sum_{v_i \in V(G)} d_i^2\) and \(M_2 = \sum_{v_iv_j \in E(G)} d_i\,d_j\) are the oldest and most thoroughly investigated vertex degree-based molecular structure descriptors.
Borovićanin, Bojana   +3 more
openaire   +1 more source

Computing connection-based topological indices of a carbon nanotubes

open access: yesSouth African Journal of Chemical Engineering
Topological indices (TIs) are mathematical codings of the molecular graphs that predict the physicochemical, biological, toxicological, and structural properties of the chemical compounds.
Ejaz Ul Haq   +4 more
doaj   +1 more source

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