Results 41 to 50 of about 2,629 (205)

Who was the real sabertooth predator: Thylacosmilus or Thylacoleo?

The Anatomical Record, EarlyView.
Abstract Sabertoothed mammalian predators, all now extinct, were almost exclusively feloid carnivorans (Eutheria, Placentalia): here a couple of extinct metatherian predators are considered in comparison with the placental sabertooths. Thylacosmilus (the “marsupial sabertooth”) and Thylacoleo (the “marsupial lion”) were both relatively large (puma ...
Christine M. Janis
wiley   +1 more source

Electrophysiological evaluation of the effect of peptide toxins on voltage-gated ion channels: a scoping review on theoretical and methodological aspects with focus on the Central and South American experience [PDF]

Journal of Venomous Animals and Toxins including Tropical Diseases
The effect of peptide toxins on voltage-gated ion channels can be reliably assessed using electrophysiological assays, such as the patch-clamp technique.
Jessica Rojas-Palomino, Alejandro Gómez-Restrepo, Cristian Salinas-Restrepo, César Segura, Marco A. Giraldo, Juan C. Calderón   +5 more
doaj   +1 more source

The perturbed prox-preconditioned spider algorithm: non-asymptotic convergence bounds [PDF]

IEEE Statistical Signal Processing Workshop, Jul 2021, Rio de Janeiro, Brazil, 2021
A novel algorithm named Perturbed Prox-Preconditioned SPIDER (3P-SPIDER) is introduced. It is a stochastic variancereduced proximal-gradient type algorithm built on Stochastic Path Integral Differential EstimatoR (SPIDER), an algorithm known to achieve near-optimal first-order oracle inequality for nonconvex and nonsmooth optimization.
arxiv  

Exposed weapons: A revised reconstruction of the facial anatomy and life appearance of the saber‐toothed cat Megantereon (Felidae, Machairodontinae)

The Anatomical Record, EarlyView.
Abstract Megantereon was a widespread saber‐toothed felid from the Pliocene and Pleistocene of the Old World and North America, but its rarity in the fossil record makes it complicated to restore its life appearance. Lack of complete specimens makes it necessary to combine information from fossils of different individuals to reconstruct their facial ...
Mauricio Antón, Gema Siliceo, Juan Francisco Pastor, Qigao Jiangzuo, Manuel J. Salesa   +4 more
wiley   +1 more source

Neuroactive venom compounds obtained from Phlogiellus bundokalbo as potential leads for neurodegenerative diseases: insights on their acetylcholinesterase and beta-secretase inhibitory activities in vitro

Journal of Venomous Animals and Toxins including Tropical Diseases, 2021
Background Spider venom is a rich cocktail of neuroactive compounds designed to prey capture and defense against predators that act on neuronal membrane proteins, in particular, acetylcholinesterases (AChE) that regulate synaptic transmission through ...
Simon Miguel M. Lopez, Jeremey S. Aguilar, Jerene Bashia B. Fernandez, Angelic Gayle J. Lao, Mitzi Rain R. Estrella, Mark Kevin P. Devanadera, Cydee Marie V. Ramones, Aaron Joseph L. Villaraza, Leonardo A. Guevarra Jr., Myla R. Santiago-Bautista, Librado A. Santiago   +10 more
doaj   +1 more source

An Inductive Approach to Strongly Antimagic Labelings of Graphs [PDF]

arXiv, 2022
An antimagic labeling for a graph $G$ with $m$ edges is a bijection $f: E(G) \to \{1, 2, \dots, m\}$ so that $\phi_f(u) \neq \phi_f(v)$ holds for any pair of distinct vertices $u, v \in V(G)$, where $\phi_f(x) = \sum_{x \in e} f(e)$. A strongly antimagic labeling is an antimagic labeling with an additional condition: For any $u, v \in V(G)$, if $\deg(u)
arxiv  

Spiritual and religious information experiences: An Annual Review of Information Science and Technology (ARIST) paper

Journal of the Association for Information Science and Technology, EarlyView.
Abstract This chapter examines the contours of the religious and spiritual information experiences subfield through a review and content analysis of selected contributions from the past two decades in both information science and related fields. The research question that guides this review is: How have spirituality and religion been conceptualized in ...
Nadia Caidi, Pranay Nangia, Hugh Samson, Cansu Ekmekcioglu, Michael Olsson   +4 more
wiley   +1 more source

Advances in the Role of Antimicrobial Peptides in the Management of Sexually Transmitted Infections

Journal of Clinical Laboratory Analysis, EarlyView.
The article reviews recent advancements in the use of antimicrobial peptides (AMPs) for the treatment and prevention of sexually transmitted infections (STIs), with a particular focus on research progress in combating infections such as gonorrhea, HIV, HSV, and Chlamydia, as well as the challenges and future directions in this field.
Shuangwen Xiao, Wei Zuo, Qing Xiang, Yafeng Xie, Yongjian Xiao   +4 more
wiley   +1 more source

Spider venom peptides as potential drug candidates due to their anticancer and antinociceptive activities

Journal of Venomous Animals and Toxins including Tropical Diseases
Spider venoms are known to contain proteins and polypeptides that perform various functions including antimicrobial, neurotoxic, analgesic, cytotoxic, necrotic, and hemagglutinic activities.
Ting Wu, Meng Wang, Wenfang Wu, Qianxuan Luo, Liping Jiang, Huai Tao, Meichun Deng   +6 more
doaj   +1 more source

Periumbilical Pain with Radiation to Both Legs Following Tarantula Bite; a Case Report

Archives of Academic Emergency Medicine, 2018
Tarantulas have recently become as pets in most parts of the world that increased the probability of encountering emergency physicians with patients hurt with these spiders. Their attacks usually do not cause general manifestation, however there are some
Mahboob Pouraghaei, Samad Shams Vahdati, Ibrahim Mashhadi, Taranoom Mahmoudieh   +3 more
doaj   +1 more source