OBJECTIVE When utilizing a single implant-supported crown to replace a central incisor, understanding the final shape of the implant restoration is an important factor to help achieve a successful esthetic outcome. In today's dentistry, tooth shape is a critical factor when dental implant prostheses are considered in the esthetic zone. The major esthetic goal for this type of restoration is to ...

The relationship between scenic beauty grade and measured tree indicators was studied through evaluation of 427 photos of individual Pinus tabulaeformis trees by using the scenic beauty estimation (SBE) method. Thirteen indices to reflect trunk, crown and stem-to-canopy ratios of individual trees were evaluated by invited students. Results showed that students preferred large diameters at breas...

Novel 2-benzothiazole-, 4-pyridine-, and 2- and 4-quinoline-based styryl dyes containing an N-methylbenzoaza-15(18)-crown-5(6)-ether moiety were synthesized. A detailed electronic spectroscopy study revealed high performance of these compounds as optical molecular sensors for alkali and alkaline-earth metal cations. They were shown to considerably surpass analogous chromoionophores based on N-p...

The crystal structure of the title compound C(8)H(10)N(3) (+)·ClO(4) (-)·C(12)H(24)O(6)·H(2)O, consists of an organic (1H-benzimidazol-2-yl)methanaminium cation, an inorganic ClO(4) (-) anion, one 18-crown-6 mol-ecule and one water mol-ecule. In the crystal, the cations and 18-crown-6 mol-ecules are linked by N-H⋯O hydrogen bonds. The crystal packing is stabilized by inter-molecular O-H⋯O, O-H⋯...

Tropical cities can use urban greening designs featuring trees that provide shade and cooling in hot outdoor environments. The cooling effect involves numerous tree characteristics that are not easy to control during planting design, such as the canopy size and the optical properties of leaves. Planting the appropriate tree species dominates the cooling effects and the human thermal environment...

OBJECTIVE To determine the location of center of resistance and the relationship between height of retraction force on power arm (power-arm length) and movement of anterior teeth (degree of rotation) during sliding mechanics retraction. MATERIALS AND METHODS Three human subjects with maxillary protrusion were selected for this study. Initial tooth displacements of maxillary right central inci...

Tomato (Solanum lycopersicum) crops can be severely damaged due to parasitism by the root-knot nematode (RKN) Meloidogyne incognita, but are protected when intercropped with crown daisy (Chrysanthemum coronarium L.). Root exudate may be the determining factor for this protection. An experiment using pots linked by a tube and Petri dish experiments were undertaken to confirm that tomato-crown da...

Macrocyclic compounds (crown ethers), specifically 18-crown-6 (18-C-6), benzo-15-crown-5 (B-15-C-5), di-benzo-18-crown-6 (DB-18-C-6) and di-cyclohexano-18-crown-6 (DC-18C-6), are used as extractants as well as synergists with amine-group extractants. Platinum and rhodium belong to platinum-group metals (PGMs) and have very similar ionic radii and similar properties. The separation of PGMs is mo...

AbstractIn practice, a supplier with limited capacity often puts on allocation, i.e., rationing through quantity competition of retailers rather than pricing mechanism. Capacity allocation is common occurrence in industries which expansion costly and time consuming price given exogenously (e.g., steel paper). A can use his prior beliefs own the retailers’ needs to construct mechanism for among ...