145 Result(s)
within
**min Zhu
Science, Humanities and Social Sciences, multidisciplinary
Science, multidisciplinary
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Article
Homology of a yeast actin-binding protein to signal transduction proteins and myosin-I
IN yeast, the cortical actin cytoskeleton seems to specify sites of growth of the cell surface1,2. Because the actin-binding protein ABPlp is associated with the cortical cytoskeleton of Saccharomyces cerevisiae,...
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Article
A primitive fossil fish sheds light on the origin of bony fishes
Living gnathostomes (jawed vertebrates) include chondrichthyans (sharks, rays and chimaeras) and osteichthyans or bony fishes. Living osteichthyans are divided into two lineages, namely actinopterygians (bichi...
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Article
A primitive sarcopterygian fish with an eyestalk
The discovery of two Early Devonian osteichthyan (bony fish) fossils1,2,3,4 has challenged established ideas about the origin of osteichthyans and their divergence into actinopterygians (teleosts and their relati...
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Article
A primitive fish close to the common ancestor of tetrapods and lungfish
The relationship of the three living groups of sarcopterygians or lobe-finned fish (tetrapods, lungfish and coelacanths) has been a matter of debate1,2,3,4,5. Although opinions still differ, most recent phylogeni...
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Article
First Devonian tetrapod from Asia
The earliest tetrapods (vertebrates with limbs rather than paired fins) date from the Late Devonian Period (370–354 million years ago)1,2 — nine genera have been described, all of which are from the Euramerican s...
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Article
The origin of the internal nostril of tetrapods
The choana, a unique ‘internal nostril’ opening from the nasal sac into the roof of the mouth, is a key part of the tetrapod (land vertebrate) respiratory system. It was the first component of the tetrapod bod...
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A primitive fish provides key characters bearing on deep osteichthyan phylogeny
Ray-finned bony fish (ranging from cod to guppies) and lobe-finned bony fish (lungfish, coelacanths and the ancestors of the land vertebrates) were clearly once close relatives, but a large morphological gulf ...
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Article
The oldest articulated osteichthyan reveals mosaic gnathostome characters
The evolutionary history of osteichthyans (bony fishes plus tetrapods) extends back to the Ludlow epoch of the Silurian period. However, these Silurian forms have been documented exclusively by fragmentary fos...
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Article
NAADP mobilizes calcium from acidic organelles through two-pore channels
Three signalling molecules cause increases in intracellular Ca2+ levels by triggering release of Ca2+ from intracellular stores due to their action on specific Ca2+-permeable receptors: inositol-1,4,5-trisphospha...
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Article
Fossil jawless fish from China foreshadows early jawed vertebrate anatomy
Almost all living vertebrates have jaws. The few that don't — the lampreys and hagfish — are so specialized in other ways that understanding how jaws evolved is problematic. Fossils can provide some clues. Syn...
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Article
Earliest known coelacanth skull extends the range of anatomically modern coelacanths to the Early Devonian
Coelacanths are known for their evolutionary conservatism, and the body plan seen in Latimeria can be traced to late Middle Devonian Diplocercides, Holopterygius and presumably Euporosteus. However, the group's e...
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Article
The earliest known stem-tetrapod from the Lower Devonian of China
Recent discoveries of advanced fish-like stem-tetrapods (for example, Panderichthys and Tiktaalik) have greatly improved our knowledge of the fin-to-limb transition. However, a paucity of fossil data from primiti...
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Article
Open AccessAnisotropic vanadium dioxide sculptured thin films with superior thermochromic properties
VO2 (M) STF through reduction of V2O5 STF was prepared. The results illustrate that V2O5 STF can be successfully obtained by oblique angle thermal evaporation technique. After annealing at 550°C/3 min, the V2O5 S...
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Article
A Silurian placoderm with osteichthyan-like marginal jaw bones
The gnathostome (jawed vertebrate) crown group comprises two extant clades with contrasting character complements. Notably, Chondrichthyes (cartilaginous fish) lack the large dermal bones that characterize Ost...
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Article
Open AccessA new cathode material for super-valent battery based on aluminium ion intercalation and deintercalation
Due to their small footprint and flexible siting, rechargeable batteries are attractive for energy storage systems. A super-valent battery based on aluminium ion intercalation and deintercalation is proposed i...
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Article
A mechanical-force-driven physical vapour deposition approach to fabricating complex hydride nanostructures
Nanoscale hydrides desorb and absorb hydrogen at faster rates and lower temperatures than bulk hydrides because of their high surface areas, abundant grain boundaries and short diffusion distances. No current ...
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Article
Open AccessAuricular Acupressure Reduces Anxiety Levels and Improves Outcomes of in Vitro Fertilization: A Prospective, Randomized and Controlled Study
The study was to explore whether auricular acupressure (AA) can relieve anxiety during the period from trans-vaginal oocyte retrieval to the embryo transfer in IVF treatment and whether AA can improve the outc...
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Article
Open AccessMethane uptake in forest soils along an urban-to-rural gradient in Pearl River Delta, South China
We investigated soil CH4 fluxes from six forests along an urban-to-rural gradient in Guangzhou City metropolitan area, South China. The most significant CH4 consumption was found in the rural site, followed by su...
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Article
Open AccessThe largest Silurian vertebrate and its palaeoecological implications
An apparent absence of Silurian fishes more than half-a-metre in length has been viewed as evidence that gnathostomes were restricted in size and diversity prior to the Devonian. Here we describe the largest p...
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Article
Open AccessOne order of magnitude faster phase change at reduced power in Ti-Sb-Te
To date, slow Set operation speed and high Reset operation power remain to be important limitations for substituting dynamic random access memory by phase change memory. Here, we demonstrate phase change memor...
