Results 111 to 120 of about 111,464 (290)

Relations between topological indices of large chemical trees [PDF]

, 2003
1241-1245Several approximate relations have recently been established between molecular-graph-based structure descriptors of alkanes, in particular between (a) eigenvalue sum and Hosoya index.
Vesel, Aleksander, Vidovic, Dusica, Furtula, Boris, Gutman, Ivan   +3 more
core  

On degeneracy of -eigenvalue–based molecular descriptors and -equienergetic chemical trees [PDF]

, 2020
Among more than two hundreds of eigenvalue-based topological indices only a couple of them are defined using the eigenvalues devised from the adjacency matrix of a graph. The resolvent energy is probably the most recent-one such an index. In this article,
Redžepović, Izudin, Furtula, Boris
core   +1 more source

Análise da composição química foliar do ipê -amarelo (Tabebuia chrysotricha (Mart) Standl) na arborização urbana de Curitiba, PR

Ciência Florestal, 2002
The knowledgement about the nutritional status of the urban trees has a great importance for the evaluation and adoption of management practices. This work has the objective to investigate the foliar chemical composition of Tabebuia chrysotricha (Mart)
Daniela Biondi, Carlos Bruno Reissmann
doaj  

N-fixing tree species promote the chemical stability of soil organic carbon in subtropical plantations through increasing the relative contribution of plant-derived lipids

Forest Ecosystems
Biodiversity experiments have shown that soil organic carbon (SOC) is not only a function of plant diversity, but is also closely related to the nitrogen (N) -fixing plants.
Xiaodan Ye, Junwei Luan, Hui Wang, Yu Zhang, Yi Wang, Shirong Liu   +5 more
doaj   +1 more source

Mechanism of Trees / Bushes Like Pattern in Chemical System

E-Journal of Chemistry, 2009
Trees / bushes like pattern have been investigated in succinic acid + ethylacetoacetate + BrO3− + Fe (phen)3+2 + Ce+4 + H2SO4 system at 30 °C in a petridish after 6 hours.
P. K. Srivastava, Narendra Yadav
doaj   +1 more source

Measuring the Hall Effect in Hysteretic Materials

Advanced Materials, EarlyView.
The authors highlight common pitfalls in measuring the Hall effect: in hysteretic magnets, improper data processing can create signals that look exotic but are not real. This Perspective explains the origin of these artifacts and presents practical measurement strategies that help researchers identify reliable Hall responses in complex magnetic ...
Jaime M. Moya, Anthony Voyemant, Sudipta Chatterjee, Scott B. Lee, Grigorii Skorupskii, Connor J. Pollak, Leslie M. Schoop   +6 more
wiley   +1 more source

Chemical Weed Control in Trees

, 1969
Guide to chemical weed control in trees discusses when and how to apply chemicals, annual weeds, broad-leaved perennials, and quack ...
Parker, Robert, Derscheid, Lyle, Helwig, Lawrence   +2 more
core   +1 more source

High‐Performance Transparent, Deformable, and Recoverable Biomimetic Stevia–PVA Hydrogel Triboelectric Nanogenerator with Machine Learning‐Assisted Motion Recognition

Advanced Materials, EarlyView.
A transparent, deformable stevia–PVA hydrogel triboelectric nanogenerator delivers significantly enhanced mechanical strength and electrical output through biomimetic hydrogen‐bonded networks. Coupled with machine learning–assisted signal recognition, the self‐powered hydrogel enables accurate human‐motion sensing for intelligent wearable and IoT ...
Thien Trung Luu, Bui Minh Quang, Toan Minh Pham, Jinsoo Kim, Kyungwho Choi, Dukhyun Choi   +5 more
wiley   +1 more source

Immunolocalization of pectin and hemicellulose epitopes in the phloem of Norway spruce and Scots pine [Elektronisk resurs]

, 2017
Although there is considerable information on the gross chemistry of conifer bark, little is known on the chemistry of secondary phloem at the individual cell level.
Kim, Jongsik,, Sveriges lantbruksuniversitet., Daniel, Geoffrey,   +2 more
core   +1 more source

On chemical trees with minimum augmented Zagreb index [PDF]

Contributions to Mathematics, 2023
Wei Gao
doaj   +1 more source