Results 61 to 70 of about 171,423 (283)
Structural biology of ferritin nanocages
FEBS Letters, EarlyView.Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley +1 more source
The perfective and imperfective aspects in Xhosa
Stellenbosch Papers in Linguistics Plus, 2017 The present corpus study aims to investigate the semantics of the perfective and the imperfective aspects in Xhosa. In a large number of studies that investigate tense and aspect in the Nguni languages, the observations are mostly based on invented ...
Savić, Stefan
doaj +1 more source
Degree achievements and maximalization: a cross-linguistic perspective
Glossa, 2021 This paper discusses degree achievements cross-linguistically, focusing on the maximalization possibilities reported in the literature. I introduce a four-way typology where languages differ regarding whether they overtly mark (with lexical items) degree
Gabriel Martínez Vera
doaj +2 more sources
Unary probabilistic and quantum automata on promise problems
, 2015 We continue the systematic investigation of probabilistic and quantum finite automata (PFAs and QFAs) on promise problems by focusing on unary languages. We show that bounded-error QFAs are more powerful than PFAs. But, in contrary to the binary problems,
A Ambainis +19 more
core +1 more source
Enumerating Regular Languages with Bounded Delay
, 2022 We study the task, for a given language $L$, of enumerating the (generally infinite) sequence of its words, without repetitions, while bounding the delay between two consecutive words. To allow for delay bounds that do not depend on the current word length, we assume a model where we produce each word by editing the preceding word with a small edit ...
Amarilli, Antoine, Monet, Mikaël
openaire +5 more sources
FEBS Letters, EarlyView.Plasma membranes contain dynamic nanoscale domains that organize lipids and receptors. Because viruses operate at similar scales, this architecture shapes early infection steps, including attachment, receptor engagement, and entry. Using influenza A virus and HIV‐1 as examples, we highlight how receptor nanoclusters, multivalent glycan interactions ...
Jan Schlegel, Christian Sieben
wiley +1 more source
FEBS Open Bio, EarlyView.Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley +1 more source
Concentration Bounds for Unigrams Language Model [PDF]
, 2004 We show several high-probability concentration bounds for learning unigram language models. One interesting quantity is the probability of all words appearing exactly k times in a sample of size m. A standard estimator for this quantity is the Good-Turing estimator. The existing analysis on its error shows a high-probability bound of approximately O(k /
Evgeny Drukh, Yishay Mansour
openaire +2 more sources
Nuclear pore links Fob1‐dependent rDNA damage relocation to lifespan control
FEBS Open Bio, EarlyView.Damaged rDNA accumulates at a specific perinuclear interface that couples nucleolar escape with nuclear envelope association. Nuclear pores at this site help inhibit Fob1‐induced rDNA instability. This spatial organization of damage handling supports a functional link between nuclear architecture, rDNA stability, and replicative lifespan in yeast.
Yamato Okada +5 more
wiley +1 more source
Bounded parallelism and regular languages [PDF]
, 1974 Section i: Introduction and Overview. If we examine the rewriting systems of Ibarra (I), the so called Simple Matrix Grammars (SMG), we see that rewriting has the following three facets, namely (i) rewriting occurs in PARALLEL, (2) the parallelism is, a priori, BOUNDED, and (3) the rewriting is, a priori, CONTROLLED.
openaire +1 more source