Timeline:TheDiscoveryofElements Assigningcreditforthediscoveryofanewelementisoftenadifficultand complicatedprocess.First,manyelementswereinusewellbefore recordedhistory.Insomecases,theseelementswereknownintheform oftheircompounds,butnotaspureelements.Elementsthatfallintothis categoryincludecarbon,copper,gold,iron,lead...
The latter has made possible the synthesis of element 108 by 'cold' fusion of iron 58 and lead 208. Element 108 is unexpectedly stable and suggests the feasibility of eventually preparing the elusive superheavy elements.doi:10.1016/0160-9327(85)90040-7Peter Armbruster...
Trace element and isotopic composition of GJ-red zircon standard by laser ablation CK chondrites constitute the most oxidized anhydrous carbonaceous chondrite group; most of the Fe occurs in magnetite and in FeO-rich mafic silicates. The ... S Elhlou,E Belousova,WL Griffin,... - 《Geochimica...
The activity of nanomaterials (NMs) in catalytically scavenging superoxide anions mimics that of superoxide dismutase (SOD). Although dozens of NMs have been demonstrated to possess such activity, the underlying principles are unclear, hindering the disc
of sodium alkaline rock series (Atlantic type).It is rich in large ion lithophile elements such as K and Rb, and high field strength elements such as Ta, Zr, and Hf, while depleted in high field strength elements such as Ti, P and U as well as large ion lithophile element, such ...
Hence, this element was termed the β-NF-responsive element (β-NF-RE). This study provided the evidence that the regulation of GSTYa is mediated by a regulatory element that is different from that of XRE. 2.2. Antioxidant response element The further unravelling of this distinct β-NF-RE ...
The key element in this work was the conjecture that nature possesses an electroweak symmetry, mathematically described by the Lagrangian of the theory, which is spontaneously broken, granting mass to the W and Z bosons. An additional feature of this model is that it provides a mechanism for ...
Therefore, they are likely field halo stars born in GCs. If true, we estimate that at least 3+/-2% of the local field metal-poor star population was born in GCs. 展开 关键词: astrophysics, cosmology and astronomy astronomy astrophysics dwarf stars element abundance galaxies hydrogen iron ...
IRON SHINES UNDER LUCIA'S LIGHTIron (Fe) is an essential element for all living organisms, being the main cofactor of electron transfer proteins of photosynthesis, respiration and biosynthetic pathways. The control of Fe distribution to ... H Roschzttardtz,L Grillet,TTM Hoang,... 被引量: 0...
Dysregulation of iron homeostasis occurs in haematological disorders and in other diseases such as cancer and neurodegeneration. Crielaard and colleagues discuss the progress made in interfering with iron metabolism as a therapeutic strategy, as well as