In the title compound, C(32)H(28), the central cyclo-octa-tetra-ene ring has a boat conformation, and the mol-ecule is saddle shaped. The seat is defined by the mean plane of the four-atom attachment points (r.m.s. deviation = 0.014 Å) of the two bicyclo-heptenyl substituents. These substituents comprise the pommel and cantle, with each mean plane defined by four atoms proximate to the seat (r....

The problem of determining which activated ~and slow! transitions can occur from a given initial state at a finite temperature is addressed. In the harmonic approximation to transition state theory this problem reduces to finding the set of low lying saddle points at the boundary of the potential energy basin associated with the initial state, as well as the relevant vibrational frequencies. Al...

The harmonic approximation to transition state theory simplifies the problem of calculating a chemical reaction rate to identifying relevant low energy saddle points in a chemical system. Here, we present a saddle point finding method which does not require knowledge of specific product states. In the method, the potential energy landscape is transformed into the square of the gradient, which c...

Hyperbolic paraboloid surfaces or saddle-shaped materials can exist in two equilibrium shapes when the saddle shape reverses on itself and, therefore, be used as structural elements of new stimuli-responsive and shape-changing materials. Here we propose a fast easy approach to nanoarchitectonics graphene oxide nanosheets form curved interfaces. Our technology involves computer-aid design, three...

Steel ball surface-defect inspection was performed by using a new saddle-type eddy current sensor (SECS), which included a saddle coil and a signal conditioning circuit. The saddle coil was directly wound on the steel ball's outer bracket in a semi-circumferential direction. Driven by a friction wheel, the test steel ball rotated in a one-dimensional direction, such that the steel ball surface ...

purpose: to report two cases of granulomatosis with polyangiitis (gpa) presented ocular manifestations. cases report: we report two cases of scleritis with red eye, one of them was a 30 years old female patient with saddle nose and positive c-anca and the other one was a 56 year-old female patient with lung cavitation and positive c-anca. both cases undergone corticosteroid and immunosuppressiv...

OBJECTIVE To analyze the stress-strain states of bone and abutment teeth during the use of different prosthetic designs of fixed partial dentures with the use of relevant mathematical modeling principles. MATERIALS AND METHODS The use of Comsol Multiphysics 3.5 (Comsol AB, Sweden) software during the mathematical modeling of stress-strain states provided numerical data for analytical interpre...

Lake surface water temperature (LSWT) monitoring is significant as it provides valuable information on climate changes and resultant in lakes. Here, monthly moderate resolution imaging spectroradiometer LSWT data of 364 lakes during 2001–2015 were analysed to determine spatiotemporal patterns daytime (LSWTd), nighttime (LSWTn), daily (LSWTm) their drivers the Qinghai-Tibet Plateau at monthly, s...

Correspondence to: Sanjiv Kaul, MD, Cardiovascular Division, Box 800158, Medical Center, University of Virginia, Charlottesville, VA 22908-0158, USA; [email protected] . . . . . . . . . . . . . . . . . . . . . . . I n order to appreciate the spatiotemporal relation between the mitral leaflets and mitral annular plane during the cardiac cycle, one has to begin with the ‘‘neutral’’ position of the ...