1.Asampleofwellwatertakefromalimestoneaquifercontains100mg/LofCa2+and10mg/LofCO32-.IsCaCO3(s)precipitating,dissolving,orinequilibriumwiththisgroundwater?ThepKsforCaCO3(s)=8.34 2.Phosphorus(phosphate)issometimesremovedfromwastewatersbyprecipitationasCa3(PO4)2(s).IfthedesiredconcentrationofdissolvedPO43-is...
Pencil ? Ruler (cm/mm) * A 1 Duration: 1 hour 7 3 0 2 * INSTRUCTIONS TO CANDIDATES ? ? ? ? ? Write your name, centre number and candidate number in the boxes above. Please write clearly and in capital letters. Use black ink. HB pencil may be used for graphs and diagrams only....
β-Cyclodextrin-conjugated zinc(II) phthalocyanines form stable host–guest complexes with a tetrasulfonated porphyrin and sodium 2-anthraquinonesulfonate (AQ) in water. Upon excitation of the porphyrin unit, they undergo excitation energy transfer followed by electron transfer as shown by various spectro...
Introduction to Organic Chemistry, Unit 3: Chirality at Carbon Centers A. Chiral Molecules
A cyclophane incorporating one 1,5-dioxynaphthalene ring system and one () unit bridged by [(2)CH(2)O] linkages has been synthesized. In this cyclophane, t... R Ballardini,V Balzani,J Becher,... - 《Journal of Organic Chemistry》 被引量: 241发表: 2000年 Synthesis and Characterization...
However, molecular-level transduction of force into luminescence in a synthetic system remains a challenge. Here, we show that bis(adamantyl)-1,2-dioxetane emits visible light when force is applied to a polymer chain or network in which this unit is incorporated. Bright-blue luminescence was ...
a focus of attention for the macro-submicro interplay problem is put in the relations between observations and inferences; we examine such relations with the aid of ideas from the philosophy of science and the specific philosophy of chemistry. We propose a model-based approach that recognises the...
The unit cell of anatase seems to expand prior to the transformation to rutile. This expansion has been attributed... S R Yoganarasimhan,C N R Raot - Solid State Chemistry:Selected Papers of C N R Rao 被引量: 21发表: 2014年 Distribution of heavy metals in the vicinity of a nuclear ...
A. Application of atomic force microscopy to characterize liposomes as drug and gene carriers. Talanta 73, 12–22 (2007). Article CAS Google Scholar Wess, T. J., Hammersley, A., Wess, L. & Miller, A. Type-I collagen packing, conformation of the triclinic unit-cell. J. Mol. Biol....
The pilosebaceous unit of the human skin consists of the hair follicle and the sebaceous gland. Within this "mini-organ", the sebaceous gland has been negl... BI Tóth,A Oláh,Attila G. Sz?ll?si,... - 《Pflügers Archiv European Journal of Physiology》 被引量: 43发表: 2011年 Interleu...