scholarly journals Selective cysteine modification of metal-free human metallothionein 1a and its isolated domain fragments: Solution structural properties revealed via ESI-MS

2017 ◽  
Vol 26 (5) ◽  
pp. 960-971 ◽  
Author(s):  
Gordon W. Irvine ◽  
Melissa Santolini ◽  
Martin J. Stillman
Keyword(s):  
Structural Properties ◽  
Cysteine Modification ◽  
Metal Free ◽  
Esi Ms

Structural properties of metal-free apometallothioneins

2012 ◽  
Vol 425 (2) ◽  
pp. 485-492 ◽  
Author(s):  
Kelly L. Summers ◽  
AnjanPreet K. Mahrok ◽  
Michael D.M. Dryden ◽  
Martin J. Stillman
Keyword(s):  
Structural Properties ◽  
Metal Free

scholarly journals Template Synthesis of New Type of Macrocyclic Molecule Derived from Pyridine-2, 6-decarboxaldehyde and 1,2-bis(2-Aminoethoxy) Ethane

2011 ◽  
Vol 35 (1) ◽  
pp. 61-65 ◽  
Author(s):  
Md Mahbubul Alam
Keyword(s):  
Schiff Base ◽  
Template Synthesis ◽  
Metal Source ◽  
Metal Free ◽  
Esi Ms ◽  
Template Condensation ◽  
New Type ◽  
Academy Of Sciences

The cyclic (2+2) template condensation of pyridine-2,6-dicarboxaldehyde with 1,2-bis(2- aminoethoxy) ethane using Pb(SCN)2 as the metal source gave dinuclear lead (II) complex, Pb2L1(SCN)4 (1), where L1 is tetra-Schiff-base macrocycle. Treatment of 1 with NaBH4 in methanol gave a metal-free reduced macrocycle L2 which has been characterized by 1HNMR and ESI-MS spectroscopy.DOI: http://dx.doi.org/10.3329/jbas.v35i1.7971Journal of Bangladesh Academy of Sciences, Vol.35, No.1, 61-65, 2011

pH dependence of the non-cooperative binding of Bi3+ to human apo-metallothionein 1A: kinetics, speciation, and stoichiometry

Metallomics ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 435-448 ◽  
Author(s):  
Natalie C. Korkola ◽  
Patti M. Scarrow ◽  
Martin J. Stillman
Keyword(s):  
Ph Dependence ◽  
Cooperative Binding ◽  
Stopped Flow ◽  
Cysteine Modification ◽  
Esi Ms ◽  
Stopped Flow Kinetics

ESI-MS along with cysteine modification show that the binding of Bi3+ to apo-metallothionein is non-cooperative with a coordination of BiS(cys)3 up to Bi6MT. Stopped flow kinetics reveal that the rate of binding depends on the pH and the Bi3+ anion.

The Shadow Widths of Very Small Particles are Formed Independently of the Metal Cap Build Up on the Particle

1981 ◽  
Vol 39 ◽  
pp. 568-569
Author(s):  
George C. Ruben
Keyword(s):  
Gold Particle ◽  
Film Surface ◽  
Small Particles ◽  
Geometric Process ◽  
Metal Free ◽  
Shadow Area

The formation of shadows behind small particles has been thought to be a geometric process (GP) where the metal cap build up on the particle creates a shadow width the same size as or larger than the particle. This GP cannot explain why gold particle shadow widths are generally larger than the gold particle and may have no appreciable metal cap build up (fig. 1). Ruben and Telford have suggested that particle shadow widths are formed by the width dependent deflection of shadow metal (SM) lateral to and infront of the particle. The trajectory of the deflected SM is determined by the incoming shadow angle (45°). Since there can be up to 1.4 times (at 45°) more SM directly striking the particle than the film surface, a ridge of metal nuclei lateral to and infront of the particle can be formed. This ridge in turn can prevent some SM from directly landing in the metal free shadow area. However, the SM that does land in the shadow area (not blocked by the particle or its ridge) does not stick and apparently surface migrates into the SM film behind the particle.

Recent advancement in the electrocatalytic synthesis of ammonia

Nanoscale ◽  
2020 ◽  
Vol 12 (15) ◽  
pp. 8065-8094 ◽  
Author(s):  
Xudong Wen ◽  
Jingqi Guan
Keyword(s):  
Metal Oxide ◽  
Oxide Catalysts ◽  
Single Atom ◽  
Metal Oxide Catalysts ◽  
Metal Free ◽  
Recent Advancement ◽  
Nanocomposite Catalysts

Different kinds of electrocatalysts used in NRR electrocatalysis (including single atom catalysts, metal oxide catalysts, nanocomposite catalysts, and metal free catalysts) are introduced.

Transition-metal-free catalytic hydroboration reduction of amides to amines

2020 ◽  
Vol 7 (21) ◽  
pp. 3515-3520
Author(s):  
Wubing Yao ◽  
Jiali Wang ◽  
Aiguo Zhong ◽  
Shiliang Wang ◽  
Yinlin Shao
Keyword(s):  
Transition Metal ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Value Added ◽  
Metal Free

The selective catalytic reduction of amides to value-added amine products is a desirable but challenging transformation.

Deaminative carbonylative thioesterification of activated alkylamines with thiophenols under transition-metal-free conditions

2021 ◽  
Author(s):  
Fengqian Zhao ◽  
Xiao-Feng Wu
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Metal Free

A transition-metal-free radical carbonylation of activated alkylamines with thiophenols has been successfully developed. Various thioesters were selectively produced with moderate to good yields.

Newborn's Preference for Faces

1996 ◽  
Vol 1 (3) ◽  
pp. 200-205 ◽  
Author(s):  
Carlo Umiltà ◽  
Francesca Simion ◽  
Eloisa Valenza
Keyword(s):  
Visual System ◽  
Structural Properties ◽  
Sensory Properties ◽  
Human Face ◽  
System Experiment ◽  
Face Experiment

Four experiments were aimed at elucidating some aspects of the preference for facelike patterns in newborns. Experiment 1 showed a preference for a stimulus whose components were located in the correct arrangement for a human face. Experiment 2 showed a preference for stimuli that had optimal sensory properties for the newborn visual system. Experiment 3 showed that babies directed their attention to a facelike pattern even when it was presented simultaneously with a non-facelike stimulus with optimal sensory properties. Experiment 4 showed the preference for facelike patterns in the temporal hemifield but not in the nasal hemifield. It was concluded that newborns' preference for facelike patterns reflects the activity of a subcortical system which is sensitive to the structural properties of the stimulus.

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