نتایج جستجو برای: pom
تعداد نتایج: 1613 فیلتر نتایج به سال:
Splitting of water to produce hydrogen and oxygen is a green effective method clean energy. Finding an efficient decomposition catalyst the key step realize decomposition. In this work, by choosing from literature, six polynuclear manganese (Mn) containing polyoxometalates (Mn-POMs) with different Mn-O clusters oxidation states Mn, [MnIIMnIIISiW10O37(OH)(H2O)]6? (Mn2-POM), [MnII3MnIII(H2O)2(PW9...
یک مسئله اساسی در نظریه اطلاعات کوانتومی تشخیص حالت کوانتومی است. آن عبارت است از مسئله تمیز دادن مابین حالتهایی است که یک سیستم فیزیکی ممکن است داشته باشد. عموما تشخیص حالت نمی تواند بطور دقیق انجام شود. بنابراین یک مسئله تشخیص حالت کوانتومی عبارت است از تعیین اینکه کدام استراتژی اندازه گیری، احتمال حدس صحیح حالت را بیشینه می سازد. چنین استراتژیهای اندازه گیری استراتژیهای بهینه نامیده می شود. ...
1. Lyotropic behavior of C12OazoE3OH: Pure amphiphiles with rigid segments like azobenzenes with a similar non-ionic head are able to form stable bilayers1. An aliquot of C12OazoE3OH (19 mM, in chloroform) was placed onto non-treated glass and evaporation the solvent at room temperature was allowed. Polarized optical microscopy (POM) observation through crossed polarizers revealed the smectic C...
No. 002-0001: Safeguarding CSR in Global Supply Chains: The Governance of Codes of Conduct in Buyer-Supplier Relationships Second World Conference on POM and 15th Annual POM Conference, Cancun, Mexico, April 30 May 3, 2004 By: Esben Rahbek Pedersen Department of Operations Management Copenhagen Business School Solbjerg Plads 3 DK-2000 Frederiksberg C E-mail: [email protected], Tel.: +45 38 15 27 41...
Pressed pellets of polyoxometalate (POM)-based materials are shown to undergo morphogenesis to produce microtubular network architectures without the need for a large single crystal precursor. The compression of the POM material into a pellet lowers the solubility sufficiently to allow tube initiation and growth from POMs that would otherwise be too soluble in their native crystalline state, th...
Acid and redox reaction rates of CH3OH-O2 mixtures on polyoxometalate (POM) clusters, together with isotopic, spectroscopic, and theoretical assessments of catalyst properties and reaction pathways, were used to define rigorous descriptors of reactivity and to probe the compositional effects for oxidative dehydrogenation (ODH) and dehydration reactions. P-MAS NMR, transmission electron microsco...
The impact of human activities on the concentrations and composition of dissolved organic matter (DOM) and particulate organic matter (POM) was investigated in the Walloon Region of the Meuse River basin (Belgium). Water samples were collected at different hydrological periods along a gradient of human disturbance (50 sampling sites ranging from 8.0 to 20,407 km) and during a 1.5 year monitorin...
In the mammalian brain, thalamic signals reach the cortex via two major routes: primary and higher-order thalamocortical pathways. While primary thalamocortical nuclei transmit sensory signals from the periphery, the function of higher-order thalamocortical projections remains enigmatic, in particular their role in sensory processing in the cortex. Here, by optogenetically controlling the thala...
Polyoxometalate (POM) chemistry has recently offered excellent examples of single ion magnets (SIMs) and molecular spin qubits. Compared with conventional coordination compounds, POMs provide rigid and highly symmetric coordination sites. However, all POM-based SIMs reported to date exhibit a very limited range of possibilities for chemical processability. We present herein two new families of ...
A sediment model has been developed to simulate the Sediment Oxygen Demand (SOD) and sediment nutrient fluxes after a sudden input of Particulate Organic Matter (POM). Compared with previous sediment models, the main model advancements are the use of a continuous function to represent the kinetics of POM diagenesis and inclusion of the biomass content in POM diagenesis. Laboratory experiments a...
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