Primordial organisms of the putative RNA world would have required polymerase ribozymes able to replicate RNA. Known ribozymes with polymerase activity best approximating that needed for RNA replication contain at their catalytic core the class I RNA ligase, an artificial ribozyme with a catalytic rate among the fastest of known ribozymes. Here we present the 3.0 angstrom crystal structure of t...

Abstract : this paper presents two techniques of geometric modelization in 3D-space for an hexapod robot. The direct and inverse models involving an alternating tripod walking pattern are described. The strategy of the first method consists in solving the problem in the plane of the body platform and then integrating the solution in the 3D analysis. The second method relies on an analytic appro...

OBJECTIVE To evaluate the postoperative results of patients with carpal tunnel syndrome by the endoscopic release technique with single portal. METHODS 78 patients (80 wrists) were evaluated preoperatively and postoperatively at 1, 3 and 6 months by the Boston questionnaire, the visual analogue scale (VAS) for pain, monofilament test sensitivity, grip strength, lateral pinch, pulp to pulp pin...

A significant group of compounds arise from substituted s-triazine derivatives that have tripodal heterocyclic compound. Compounds classified as possible created the largest and most diverse family organic compounds. In this study, we reported a new template has been syntheses cyanuric chloride its diamine derivative. The desired triamine 2, 4, 6-tris (p-aminoaanilino)-1, 3, 5-triazine (C21H21N...

An estimated three million insect species all walk using variations of the alternating tripod gait [1]. At any one time, these animals hold one stable triangle of legs steady while swinging the opposite triangle forward. Here, we report the discovery that three different flightless desert dung beetles use an additional gallop-like gait, which has never been described in any insect before. Like ...

Social Thought & Research, Vol. 30 After decades of seeing emotions as irrational and unimportant, scholars in social movements are beginning to value the role of emotions in social movements. This paper contributes to the burgeoning literature on emotions and contentious politics by proposing a synthesized tri-variate framework called the “emotional tripod.” The emotional tripod consists of th...

Methods of phylogenetic inference use more and more complex models to generate trees from data. However, even simple models and their implications are not fully understood. Here, we investigate the two-state Markov model on a tripod tree, inferring conditions under which a given set of observations gives rise to such a model. This type of investigation has been undertaken before by several scie...

A cost effective and highl platform, dubbed Norton, has been de study of near-bottom ocean processes collapsible lightweight aluminum transported in the back of a pickaccommodated on most vessels. B form of large ship anodes bolted to t desired sensors are attached to the tr typical deployment might utilize the f · Acoustic Doppler Current Profiler directional wave data. · Marsh McBirney electr...

A novel eccentric paddle mechanism based on the epicyclic gear mechanism (ePaddle-EGM) has been proposed to enhance the mobility of amphibious robot for multi-terrain tasks with diverse locomotion gaits. This paper presents a brief description for this mechanism. Based on the feature of ePaddle-EGM, a unique non-reciprocating legged gait planning method is proposed. This method could minimize t...