نتایج جستجو برای: black widow spider

تعداد نتایج: 151112  

Journal: :Croatian medical journal 2003
Boris Dzelalija Alan Medic

AIM To analyze clinical and epidemiological characteristics of the black widow spider (Latrodectus tredecimguttatus) bites and asses the impact of antitoxin administration after the bite on the intensity and duration of pain. METHOD Retrospective analysis of clinical appearance, laboratory findings, and clinical assessment of the antitoxin administration efficacy in 32 patients with latrodect...

2013
Edward J. Otten

Venomous animals account for considerable morbidity and mortality worldwide. Snakes alone are estimated to inflict 2.5 million venomous bites annually, with approximately 125,000 deaths. The actual numbers may be much larger. Southeast Asia, India, Brazil, and areas of Africa lead the world in snakebite mortality. It is impossible to estimate the worldwide morbidity and mortality resulting from...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1978
M C Tzeng R S Cohen P Siekevitz

The effect of alpha-latrotoxin on cerebral cortex slices was studied by both biochemical and morphological methods. This toxin greatly stimulates the release of preloaded gamma-amino[3H]butyric acid from cortex slices. The response increases linearly with dose. The release is not dependent on the presence of extracellular Ca2+, and therefore it is not mediated by the release of other transmitte...

Journal: :The Journal of Cell Biology 1981
N Hirokawa J E Heuser

Taking advantage of the fact that nerve terminal mitochondria swell and sequester calcium during repetitive nerve stimulation, we here confirm that this change is caused by calcium influx into the nerve and use this fact to show that botulinum toxin abolishes such calcium influx. The optimal paradigm for producing the mitochondrial changes in normal nerves worked out to be 5 min of stimulation ...

Journal: :The Journal of Cell Biology 1979
R Fesce F Grohovaz W P Hurlbut B Ceccarelli

The intramembrane particles on the presynaptic membrane and on the membrane of synaptic vesicles were studied at freeze-fractured neuromuscular junctions of the frog. The particles on the P face of the presynaptic membrane belong to two major classes: small particles with diameters less than 9 nm and large particles with diameters between 9 and 13 nm. In addition, there were a few extralarge pa...

Journal: :The Journal of Cell Biology 1972
B. Ceccarelli W. P. Hurlbut A. Mauro

Curarized cutaneous pectoris nerve muscle preparations from frogs were subjected to prolonged indirect stimulation at 2/sec while recording from end plate regions. At the ends of the periods of stimulation, the curare was removed and the preparations were fixed for electron microscopy or treated with black widow spider venom to determine the degree to which their stores of transmitter had been ...

Journal: :The Astrophysical Journal 2022

Abstract Several redback and black widow millisecond pulsar binaries have episodes of flaring in X-rays optical. We initially detected such behavior from the Fermi selected candidate 1FGL J0523.5–2529 during optical time-series monitoring. Triggered observations with Neil Gehrels Swift Observatory over next ≈100 days showed episodic luminosity up to 8 × 10 33 erg s −1 (∼100 times minimum), a co...

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