Results 61 to 70 of about 225,485 (404)
Vacuoles in Bryophytes: Properties, Biogenesis, and Evolution
Frontiers in Plant Science, 2022 Vacuoles are the most conspicuous organelles in plants for their indispensable functions in cell expansion, solute storage, water balance, etc. Extensive studies on angiosperms have revealed that a set of conserved core molecular machineries orchestrate ...
Hao-ran Liu +8 more
doaj +1 more source
Hydro-osmotic instabilities in active membrane tubes [PDF]
Phys. Rev. Lett. 120, 138102 (2018), 2017 We study a membrane tube with unidirectional ion pumps driving an osmotic pressure difference. A pressure driven peristaltic instability is identified, qualitatively distinct from similar tension-driven Rayleigh type instabilities on membrane tubes.
arxiv +1 more source
Genetic Neural Architecture Search for automatic assessment of human sperm images [PDF]
Expert Systems with Applications, 2021, 2019 Male infertility is a disease which affects approximately 7% of men. Sperm morphology analysis (SMA) is one of the main diagnosis methods for this problem. Manual SMA is an inexact, subjective, non-reproducible, and hard to teach process. As a result, in this paper, we introduce a novel automatic SMA based on a neural architecture search algorithm ...
arxiv +1 more source
Fine morphological assessment of quality of human mature oocytes after slow freezing or vitrification with a closed device: a comparative analysis [PDF]
, 2014 BACKGROUND: Human mature oocytes are very susceptible to cryodamage. Several reports demonstrated that vitrification might preserve oocyte better than slow freezing. However, this is still controversial.
A. Borini +7 more
core +2 more sources
First order perturbations of the Einstein-Straus and Oppenheimer-Snyder models [PDF]
Phys.Rev.D78:084022,2008, 2008 We derive the linearly perturbed matching conditions between a Schwarzschild spacetime region with stationary and axially symmetric perturbations and a FLRW spacetime with arbitrary perturbations. The matching hypersurface is also perturbed arbitrarily and, in all cases, the perturbations are decomposed into scalars using the Hodge operator on the ...
arxiv +1 more source
A substrate localization model for the selective regulation of TORC1 downstream pathways
Communicative & Integrative Biology, 2018 Target of rapamycin complex 1 (TORC1) is a protein kinase complex conserved in eukaryotes that coordinates diverse cellular processes critical for cell growth to environmental conditions.
Eigo Takeda, Akira Matsuura
doaj +1 more source
The entry of unclosed autophagosomes into vacuoles and its physiological relevance.
PLoS Genetics, 2022 It is widely stated in the literature that closed mature autophagosomes (APs) fuse with lysosomes/vacuoles during macroautophagy/autophagy. Previously, we showed that unclosed APs accumulated as clusters outside vacuoles in Vps21/Rab5 and ESCRT mutants ...
Zulin Wu +17 more
doaj +1 more source
Light bending by the cosmological constant [PDF]
, 2021 We revisit the question of whether the cosmological constant $\Lambda$ affects the cosmological gravitational bending of light, by numerical integration of the geodesic equations for a Swiss cheese model consisting of a point mass and a compensated vacuole, in a Friedmann-Robertson-Walker background. We find that there is virtually no dependence of the
arxiv +1 more source
Plant, Cell and Environment, 2014 Cadmium (Cd) and arsenic (As) are toxic to all living organisms, including plants and humans. In plants, Cd and As are detoxified by phytochelatins (PCs) and metal(loid)-chelating peptides and by sequestering PC-metal(loid) complexes in vacuoles ...
Won-Yong Song +7 more
semanticscholar +1 more source
Uptake, sequestration and tolerance of cadmium at cellular levels in the hyperaccumulator plant species Sedum alfredii. [PDF]
, 2017 Sedum alfredii is one of a few plant species known to hyperaccumulate cadmium (Cd). Uptake, localization, and tolerance of Cd at cellular levels in shoots were compared in hyperaccumulating (HE) and non-hyperaccumulating (NHE) ecotypes of Sedum alfredii.
Brown, Patrick H +10 more
core +2 more sources