XLV.—On Hexactinellid spicules and their names.—Part II. Supplementary
نویسندگان
چکیده
منابع مشابه
Carbonaceous preservation of Cambrian hexactinellid sponge spicules.
Early fossil sponges offer a direct window onto the evolutionary emergence of animals, but insights are limited by the paucity of characters preserved in the conventional fossil record. Here, a new preservational mode for sponge spicules is reported from the lower Cambrian Forteau Formation (Newfoundland, Canada), prompting a re-examination of proposed homologies and sponge inter-relationships....
متن کاملIdentification of a silicatein(-related) protease in the giant spicules of the deep-sea hexactinellid Monorhaphis chuni.
Silicateins, members of the cathepsin L family, are enzymes that have been shown to be involved in the biosynthesis/condensation of biosilica in spicules from Demospongiae (phylum Porifera), e.g. Tethya aurantium and Suberites domuncula. The class Hexactinellida also forms spicules from this inorganic material. This class of sponges includes species that form the largest biogenic silica structu...
متن کاملReview of the Magnetohydrodynamic Waves and Their Stability in Solar Spicules and X-Ray Jets
One of the most enduring mysteries in solar physics is why the Sun’s outer atmosphere, or corona, is millions of kelvins hotter than its surface. Among suggested theories for coronal heating is one that considers the role of spicules – narrow jets of plasma shooting up from just above the Sun’s surface – in that process (Athay & Holzer, 1982; Athay, 2000). For decades, it was thought that spicu...
متن کاملSatisfaction of Supplementary Insurance and Medical Services during Trips in War Survivors and their Families
Introduction: During trips the imposed costs are aggravated due to time and financial limits, not being familiar with treatment centers that are covered by the insurances and charges for accommodation. Insurance, especially supplementary treatment services insurance can be an appropriate solution to decrease these costs. These kinds of insurances cover a range of services inclu...
متن کاملTwo new Cu(II) and Zn(II) Schiff base complexes: Synthesis, characterization and their biological activity
New two nano- sized Schiff base complexes [M(L)], where L= 2, 2'-((1E, 1E')-(1, 2 phenylen bis (azanylylidene)) bis (methanylylidene)) bis (4-bromo phenolato) and M=Cu or Zn, (a, b complexes) were synthesized by ultrasonic irradiation. These complexes were characterized by elemental analysis, molar conductivity, FT-IR, fluorescence emission, 1H NMR, field emission scanning electron spectroscopy...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Annals and Magazine of Natural History
سال: 1910
ISSN: 0374-5481
DOI: 10.1080/00222931008692776