In this paper, LaBO3 perovskite type catalyst formulations were prepared by sol-gel auto combustion method using citric acid as the fuel. Activity of catalysts was tested in catalytic oxidation of toluene as a model of volatile organic compounds. LaCoO3 perovskite formulation showed the highest activity among LaBO3 (Fe, Mn and Co) perovskite catalysts. So, LaCoO3 perovskite based catalyst was s...

Where and how did the complex genetic instruction set programmed into DNA come into existence? The genetic set may have arisen elsewhere and was transported to the Earth. If not, it arose on the Earth, and became the genetic code in a previous lifeless, physical-chemical world. Even if RNA or DNA were inserted into a lifeless world, they would not contain any genetic instructions unless each nu...

The catalytic properties of ribozymes depend on the sophisticated structures of the respective ribozyme-substrate complexes. Although it has been suggested that ribozyme-mediated cleavage of RNA occurs via a rather strictly defined mechanism, recent findings have clearly demonstrated the diversity of reaction mechanisms.

BiFeO3 (BFO), Bi0.86Sm0.07Eu0.07FeO3 (BSEFO), and Bi0.86Sm0.07Cd0.07FeO3 (BSCFO) nano powders were prepared by the sol-gel combustion method and the catalytic performances were evaluated in the acetylation reaction of benzyl alcohol. The physical chemical properties of the catalysts were character...

TABLE S1, related to Table 1. Binding and reactivity of AUCG with closed complexes of different ribozymes, using the-1d,rSA or the-1d,rSA 5 substrates. Numbers in parentheses represent the values relative to the A261OH ribozyme.

요 약 최근 DNA와 같은 생체 분자를 이용한 정보 처리 기술에 대한 연구가 활발하게 이루어지고 있다. 이러 한 기술의 발전은 분자 수준에서의 생화학적 정보 처리의 가능성을 보여주며, 진단 목적의 유전자 발현 정보 처리와 같은 생물학 목적의 문제 해결을 위한 새로운 방법으로 떠오르고 있다. 생체 분자 정보 처 리 기술은 기존의 전자식 컴퓨터와 달리 생체 분자로 표현된 정보를 분자 수준에서 직접 처리함으로써 정보 변환 과정에서의 손실을 줄이고 효과적인 문제 해결을 가능하게 한다. Deoxyribozyme은 DNA이면 서도 마치 효소와 같은 특성을 가지며 특정 서열의 DNA나 RNA 분자를 자르거나 이어 붙이는 기능을 가 지고 있는 DNA 분자를 말한다. 본 논문에서는 deoxyribozyme을 이용하여 ...

Group II intron ribozymes fold into their native structure by a unique stepwise process that involves an initial slow compaction followed by fast formation of the native state in a Mg(2+)-dependent manner. Single-molecule fluorescence reveals three distinct on-pathway conformations in dynamic equilibrium connected by relatively small activation barriers. From a most stable near-native state, th...