Results 61 to 70 of about 4,882,656 (297)

DIRIGINDO O OLHAR PARA O EFEITO ESTUFA NOS LIVROS DIDÁTICOS DE ENSINO MÉDIO: É SIMPLES ENTENDER ESSE FENÔMENO?

Ensaio Pesquisa em Educação em Ciências
Os livros didáticos, pela disponibilidade e acesso, são uma fonte importante de pesquisa para o professor de Ensino Médio, ao selecionar conteúdos e preparar suas aulas.
Anderson Cezar Lobato, Cristina Neres da Silva, Rochel Montero Lago, Zenilda de Lourdes Cardeal, Ana Luiza de Quadros   +4 more
doaj   +1 more source

Chemical Modification of Kraft Lignin: Effect on Chemical and Thermal Properties

BioResources, 2014
Esterified kraft lignins (KL) were prepared by reaction with maleic anhydride (MA), succinic anhydride (SA), and phthalic anhydride (PA) in acetone solutions.
Yao Chen, Nicole M. Stark, Zhiyong Cai, Charles R. Frihart, Linda F. Lorenz, Rebecca E. Ibach   +5 more
doaj   +1 more source

Low Shrinkage Bleaching of Unbleached Neutral Sulphite Semichemical Pulp [PDF]

, 1959
The main objective of this research project was the investigation of the most feasible method for the bleaching of a soft-cooked unbleached neutral sulphite semichemical aspen pulp cooked to a 70 percent yield.
Morrison, Jobe B.
core   +1 more source

Effect of chemical substitution in Rh17S15

, 2011
Rh17S15 has recently been shown to be a strongly correlated superconductor with a transition temperature of 5.4 K. In order to understand the nature of strong correlations we study the effect of substitution of some of the Rh and S atoms by other ...
Arumugam Tamizhavel, Naren H R, Naren H R, Ramakrishan S   +3 more
core   +1 more source

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

Research Progress on Dynamic Mechanical Response Characteristics of High-Velocity Particle Flow Impacting Multilayer Sandwich Composite Structures

Gaoya wuli xuebao
Multilayer sandwich composite structures have significant applications in impact protection. In particular, they demonstrate superior protective performance when subjected to impacts from explosive fragment particle clusters.
Wei ZHENG, Kunxuan WANG, Dengwang WANG, Jun LI, Yubo GAO   +4 more
doaj   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Dataset on target chemical and bioassay analysis—Exploring contaminants of emerging concern in a low mountain river of central Germany

Data in Brief
Chemical pollution of the aquatic environment is nowadays characterised by increasing levels of anthropogenic organic compounds at low concentrations and is recognised as one of the main drivers of the deteriorated ecological state of European ...
Fabian G. Weichert, Werner Brack, Mario Brauns, Patrick Fink, Sarah Johann, Martin Krauss, Henner Hollert   +6 more
doaj   +1 more source

Meson Excitation at Finite Chemical Potential

, 2018
We consider a probe stable meson in the holographic quark-gluon plasma at zero temperature and chemical potential. Due to the energy injection into the plasma, the temperature and chemical potential are increased to arbitrary finite values and the meson ...
Ali-Akbari, Mohammad, Hajilou, Ali
core   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source