Results 71 to 80 of about 5,995,783 (336)

Level of Precompetitive Anxiety and Self-Confidence in High Level Padel Players

open access: yesFrontiers in Psychology, 2022
The objectives of the present study were firstly to evaluate precompetitive anxiety and self-confidence (SC) in padel players according to their playing level; and secondly, to study the factors that influence the levels of precompetitive anxiety and SC.
Alfonso Castillo-Rodriguez   +6 more
doaj   +1 more source

Spherical Categories

open access: yesAdvances in Mathematics, 1999
This paper is a study of monoidal categories with duals where the tensor product need not be commutative. The motivating examples are categories of representations of Hopf algebras and the motivating application is the definition of 6j-symbols as used in topological field theories. We introduce the new notion of a spherical category.
Bruce W. Westbury, John W. Barrett
openaire   +3 more sources

Category theory : definitions and examples [PDF]

open access: yes, 1990
Category theory was invented as an abstract language for describing certain structures and constructions which repeatedly occur in many branches of mathematics, such as topology, algebra, and logic.
Srinivas, Yellamraju V.
core  

C‐mannosylation promotes ADAMTS1 activation and secretion in human testicular germ cell tumor NEC8 cells

open access: yesFEBS Letters, EarlyView.
C‐mannosylation is a unique form of protein glycosylation. In this study, we demonstrated that ADAMTS1 is C‐mannosylated at Trp562 and Trp565 in human testicular germ cell tumor NEC8 cells. We found that C‐mannosylation of ADAMTS1 is essential for its secretion, processing, enzymatic activity, and ability to promote vasculogenic mimicry. These findings
Takato Kobayashi   +5 more
wiley   +1 more source

Internal categories in Mal’cev categories

open access: yesJournal of Pure and Applied Algebra, 1999
The main result of this article is that the category of internal categories and functors in a Mal'cev exact category is again a Mal'cev exact category (exactness here is in the sense of \textit{M. Barr}). This result applies not only to categories of groups, rings, Lie algebras etc., but also to some non-varietal categories such as the duals of the ...
openaire   +2 more sources

The Category of Matroids [PDF]

open access: yesApplied Categorical Structures, 2017
31 pages, 10 diagrams, 28 ...
Chris Heunen, Vaia Patta
openaire   +6 more sources

Microbial exopolysaccharide production by polyextremophiles in the adaptation to multiple extremes

open access: yesFEBS Letters, EarlyView.
Polyextremophiles are microorganisms that endure multiple extreme conditions by various adaptation strategies that also include the production of exopolysaccharides (EPSs). This review provides an integrated perspective on EPS biosynthesis, function, and regulation in these organisms, emphasizing their critical role in survival and highlighting their ...
Tracey M Gloster, Ebru Toksoy Öner
wiley   +1 more source

Fibration categories are fibrant relative categories [PDF]

open access: yesAlgebraic & Geometric Topology, 2016
A relative category is a category with a chosen class of weak equivalences. Barwick and Kan produced a model structure on the category of all relative categories, which is Quillen equivalent to the Joyal model structure on simplicial sets and the Rezk model structure on simplicial spaces.
openaire   +6 more sources

The Image of the Derived Category in the Cluster Category [PDF]

open access: yesInternational Mathematics Research Notices, 2012
Cluster categories of hereditary algebras have been introduced as orbit categories of their derived categories. Keller has pointed out that for non-hereditary algebras orbit categories need not be triangulated, and he introduced the notion of triangulated hull to overcome this problem.
Amiot, Claire, Oppermann, Steffen
openaire   +5 more sources

The nicotinamide hypothesis revisited—plant defense signaling integrating PARP, nicotinamide, nicotinic acid, epigenetics, and glutathione

open access: yesFEBS Letters, EarlyView.
Nicotinamide (NIC) and nicotinic acid (NIA) are proposed as stress signaling compounds in plants. Oxidative stress may lead to single strand breaks (SSB) in DNA, which activate poly(ADP‐ribose) polymerase (PARP). NIC and NIA are then formed from NAD. NIC and NIA can promote epigenetic changes leading to the expression of defense genes specific for the ...
Torkel Berglund, Anna B. Ohlsson
wiley   +1 more source

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