Results 111 to 120 of about 129,894 (264)

Highlights in the knowledge of brown spider toxins

open access: yesJournal of Venomous Animals and Toxins including Tropical Diseases, 2017
Brown spiders are venomous arthropods that use their venom for predation and defense. In humans, bites of these animals provoke injuries including dermonecrosis with gravitational spread of lesions, hematological abnormalities and impaired renal function.
Daniele Chaves-Moreira   +5 more
doaj   +1 more source

Contact Urticaria and Related Conditions: Clinical Review

open access: yesContact Dermatitis, EarlyView.
ABSTRACT Contact urticaria (CoU) is an immediate contact reaction occurring within minutes to an hour after exposure to specific proteins or chemicals. CoU is categorised into non‐immunologic (NI‐CoU) and immunologic (I‐CoU) types, with I‐CoU potentially leading to anaphylaxis. Both forms of CoU can be associated with protein contact dermatitis and the
Mojca Bizjak   +15 more
wiley   +1 more source

An Economic Dilemma between Molecular Weapon Systems May Explain an Arachno-Atypical Venom in Wasp Spiders (Argiope bruennichi)

open access: yesBiomolecules, 2020
Spiders use venom to subdue their prey, but little is known about the diversity of venoms in different spider families. Given the limited data available for orb-weaver spiders (Araneidae), we selected the wasp spider Argiope bruennichi for detailed ...
Tim Lüddecke   +7 more
doaj   +1 more source

Venomics Approach Reveals a High Proportion of Lactrodectus-Like Toxins in the Venom of the Noble False Widow Spider Steatoda nobilis

open access: yesToxins, 2020
The noble false widow spider Steatoda nobilis originates from the Macaronesian archipelago and has expanded its range globally. Outside of its natural range, it may have a negative impact on native wildlife, and in temperate regions it lives in ...
John P. Dunbar   +5 more
semanticscholar   +1 more source

The molecular mechanisms of defensive‐grade organic acid biosynthesis in ground beetles

open access: yesInsect Molecular Biology, EarlyView.
Formic acid and methacrylic acid are the primary defensive chemicals in the pygidial gland secretions of Platynus angustatus and Pterostichus moestus, respectively. Comparative transcriptomics suggests the folate cycle and valine catabolism may be involved in the biosynthesis of formic acid and methacrylic acid, respectively.
Adam M. Rork   +3 more
wiley   +1 more source

δ-Ctenitoxin-Pn1a, a Peptide from Phoneutria nigriventer Spider Venom, Shows Antinociceptive Effect Involving Opioid and Cannabinoid Systems, in Rats

open access: yesToxins, 2016
PnTx4(6-1), henceforth renamed δ-Ctenitoxin-Pn1a (δ-CNTX-Pn1a), a peptide from Phoneutria nigriventer spider venom, initially described as an insect toxin, binds to site 3 of sodium channels in nerve cord synaptosomes and slows down sodium current ...
Bruna Luiza Emerich   +7 more
semanticscholar   +1 more source

Making with the Trouble: Un/Enfolding Posthuman Participants with Young People in Creative Post‐Qualitative Research

open access: yesInternational Journal of Art &Design Education, EarlyView.
Abstract This paper explores how ‘what matters’ can surface in multisensory arts‐informed projects as ways for young people to survive and stay with gender and sexuality troubles that are always more than theirs. Situated in an ex‐mining post‐industrial locale, we make an agential cut in a longitudinal research and engagement project called Unboxing ...
EJ Renold
wiley   +1 more source

Spider Neurotoxins, Short Linear Cationic Peptides and Venom Protein Classification Improved by an Automated Competition between Exhaustive Profile HMM Classifiers

open access: yesToxins, 2017
Spider venoms are rich cocktails of bioactive peptides, proteins, and enzymes that are being intensively investigated over the years. In order to provide a better comprehension of that richness, we propose a three-level family classification system for ...
Dominique Koua, Lucia Kuhn-Nentwig
doaj   +1 more source

Testing Mean Stability of Heteroskedastic Time Series

open access: yesJournal of Time Series Analysis, EarlyView.
ABSTRACT Time series models are often fitted to the data without preliminary checks for stability of the mean and variance, conditions that may not hold in much economic and financial data, particularly over long periods. Ignoring such shifts may result in fitting models with spurious dynamics that lead to unsupported and controversial conclusions ...
Violetta Dalla   +2 more
wiley   +1 more source

Spider Venom as Bio-Insecticide

open access: yes, 2023
Insecticidal toxins derived from insect predators and parasitoids are of growing interest in the development of bio-insecticides at present. One of the major features contributing to the overall success of spiders is the production of a highly toxic venom from their venom glands that they employ to subdue prey and deter predators.
openaire   +2 more sources

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