Results 81 to 90 of about 1,445 (260)

Care Praxis–Driven STEM Design for Sustainable and Just Communities in Middle School

Journal of Research in Science Teaching, EarlyView.
ABSTRACT Despite the growing interest in incorporating care ethics into STEM education, these topics are rarely integrated into K‐12 standards and pedagogical practice. We explore how care praxis, a political and ethical approach to STEM education, supports students' sense‐making in addressing real‐world problems throughout STEM design, merging social,
Wisam Sedawi, Angela Calabrese Barton, Edna Tan   +2 more
wiley   +1 more source

RAINBOW VERTEX CONNECTION NUMBER OF BULL GRAPH, NET GRAPH, TRIANGULAR LADDER GRAPH, AND COMPOSITION GRAPH (P_n [P_1 ])

Barekeng
The rainbow connection was first introduced by Chartrand in 2006 and then in 2009 Krivelevich and Yuster first time introduced the rainbow vertex connection. Let graph be a connected graph.
Muhammad Ilham Nurfaizi Annadhifi, Robiatul Adawiyah, Dafik Dafik, I Nengah Suparta   +3 more
doaj   +1 more source

Rainbow Connection Number of Graphs with Diameter 3

Discussiones Mathematicae Graph Theory, 2017
A path in an edge-colored graph G is rainbow if no two edges of the path are colored the same. The rainbow connection number rc(G) of G is the smallest integer k for which there exists a k-edge-coloring of G such that every pair of distinct vertices of G
Li Hengzhe, Li Xueliang, Sun Yuefang
doaj   +1 more source

Exploring Interactive Effects of Arsenic and Selenium Exposure on Larval Zebrafish (Danio rerio)

Environmental Toxicology, EarlyView.
ABSTRACT Arsenic contamination in aquatic ecosystems is a major environmental concern. Selenium (Se) helps mitigate oxidative stress and hence could reduce the toxic effects of arsenic. However, Se can also be toxic at high concentrations. Given that these metalloids commonly co‐occur in the environment, there is a pressing need for further research ...
Owen Luo, Jinnath Rehana Ritu, Md Helal Uddin, Sravan Kumar Putnala, Mahesh Rachamalla, Som Niyogi, Douglas P. Chivers   +6 more
wiley   +1 more source

Rainbow mean colorings of graphs

Discrete Mathematics Letters, 2019
Summary: A mean coloring of a connected graph \(G\) of order 3 or more is an edge coloring \(c\) of \(G\) with positive integers where the average of the colors of the edges incident with each vertex \(v\) of \(G\) is an integer. This average is the chromatic mean of \(v\).
Gary Chartrand, James Hallas, Ebrahim Salehi, Ping Zhang   +3 more
openaire   +2 more sources

Antimicrobial Residues in a Key Cerrado River: Distribution, Persistence, and Effects on Zebrafish Embryo‐Larval Development

Environmental Toxicology, EarlyView.
ABSTRACT The current study aimed to quantify the antimicrobials amoxicillin (AMX), cefazolin (CFZ), chloramphenicol (CHL), metronidazole (MTZ), and sulfamethoxazole (SX) in effluents and surface water of an important Cerrado river, calculate their half‐lives, and analyze their ecotoxicity following single and combined exposures.
Náthala Maria Simão, Igor Romeiro dos Santos, Jerônimo Raimundo de Oliveira Neto, Flávio Olimpio Sanches Neto, Felipe Cirqueira Dias, Jéssyca Moreira Morais, Lorranny Pereira de Assis Valadares, Naiara Raica Lopes de Oliveira, Mirelle Garcia Silva Bailão, Luiz Carlos da Cunha, Valter Henrique Carvalho‐Silva, Thiago Lopes Rocha, Elisa Flávia Luiz Cardoso Bailão   +12 more
wiley   +1 more source

Rainbow connection number of corona product of graphs

Electronic Journal of Graph Theory and Applications
In an edge-colored graph (where adjacent edges may have the same color), a rainbow path is a path whose edge colors are all distinct. The coloring is called a rainbow coloring if any two vertices can be connected by a rainbow path. The rainbow connection
Fendy Septyanto
doaj   +1 more source

Influence of Age and Exposure Pathway on Copper and Cadmium Mixture Toxicity: A Study on Daphnia magna

Environmental Toxicology, EarlyView.
ABSTRACT Metal contamination in aquatic ecosystems poses substantial risks to freshwater organisms, with mixture effects often deviating from predictions based on single‐metal toxicity. Understanding how age‐specific sensitivities and multiple exposure pathways influence mixture effects is critical for accurate risk assessment.
Sanah Majid, Karen Smeets, Mubiana K. Valentine, Ronny Blust   +3 more
wiley   +1 more source

Generalized Rainbow Connection of Graphs and their Complements

Discussiones Mathematicae Graph Theory, 2018
Let G be an edge-colored connected graph. A path P in G is called ℓ-rainbow if each subpath of length at most ℓ + 1 is rainbow. The graph G is called (k, ℓ)-rainbow connected if there is an edge-coloring such that every pair of distinct vertices of G is ...
Li Xueliang, Magnant Colton, Wei Meiqin, Zhu Xiaoyu   +3 more
doaj   +1 more source

Anti-Ramsey theory on complete bipartite graphs

AKCE International Journal of Graphs and Combinatorics, 2020
We consider quadruples of positive integers with and such that every proper edge-coloring of the complete bipartite graph contains a rainbow subgraph. We show that every such quadruple with and satisfies this property and find an infinite sequence where ...
Stephan Cho, Jay Cummings, Colin Defant, Claire Sonneborn   +3 more
doaj   +1 more source