An easier method for constructing the hierarchical micro-/nano-structures on the surface of dental implants in the clinic is needed. In this study, three different titanium surfaces with microscale grooves (width 0.5-1, 1-1.5, and 1.5-2 μm) and nanoscale nanoparticles (diameter 20-30, 30-50, and 50-100 nm, respectively) were obtained by treatment with different concentrations of hydrofluoric ac...

Let Ratk be the space of based holomorphic maps from S 2 to itself of degree k. Let βk denote the Artin’s braid group on k strings and let Bβk be the classifying space of βk. Let Ck denote the space of configurations of length less than or equal to k of distinct points in R with labels in S. The three spaces Ratk , Bβ2k , Ck are all stably homotopy equivalent to each other. For an odd prime p, ...

Let εD = v+u √ D be the fundamental unit of Z[ √ D] with Z being the ordinary integers, or maximal order, in the rational field Q. We prove that for any square-free integer D > 1, with D not dividing u, there exists a prime fD such that the relative class number HD(fD) = hf2 DD/hD = 1, where hD is the ideal class number of Z[ √ D] and hf2 DD is the ideal class number of Z[fD √ D], the order of ...

Single crystal X-ray diffraction shows the hydrogen bond within [F−H−F]− anion of Sr[HF2]2 to be symmetric with H−F lengths 1.143(5) Å and an intramolecular F⋅⋅⋅F distance 2.2826(18) Å. The [HF2]− adopts crystallographic C2-symmetry, however, it is essentially linear a F−H−F angle 174(4)°. Solid-state quantum chemical calculations agree experimental findings, showing slightly bent 177.8°. decom...

Thirty-two 160 kg dairy heifers were used to measure the effects of increasing dietary protein content on growth and heat production. A basal diet containing (g/kg) 550 sodium hydroxide-treated straw, 220 barley, 220 sugarbeet pulp and 10 urea was offered with 0, 76 and 152 g fishmeal/kg dry matter of the basal diet (F0, F1 and F2 levels respectively). The three diets were each given at two lev...

The title compound, octaaqua-(hydrogendifluorido)-di-cop-per(II) hexa-fluoridoaluminate dihydrate, was obtained under hydro-thermal conditions. The structure is isotypic with that of the analogous Fe(III) compound, [Cu(2)(HF(2))(H(2)O)(8)][FeF(6)]·2H(2)O. The coordination sphere of the Cu(II) atom is formed by one F and three water O atoms at short distances < 2 Å and is augmented by two additi...

In this study, the effect of feeding different types and amounts of dietary fiber (DF) on luminal environment and morphology in the small and large intestine of sows was studied. Three diets, a low-fiber diet (LF) and 2 high-fiber diets (high fiber 1, HF1, and high fiber 2, HF2) were used. Diet LF (DF, 17%; soluble DF 4.6%) was based on wheat and barley, whereas the 2 high-fiber diets (HF1: DF,...

The NH2-terminal amino acid sequences have been determined by automated Edman degradation for the heavy and light chains of five monoclonal IgM anti-DNA autoantibodies that were produced by human-human hybridomas derived from lymphocytes of two patients with systemic lupus erythematosus. Four of the antibodies were closely related to the idiotype system 16/6, whereas the fifth antibody was unre...

The title compound, octaaqua-(hydrogenfluorido)dicopper(II) hexa-fluoridoferrate(III) dihydrate, was synthesized under hydro-thermal conditions. The Cu atom is coordinated by one F and five O atoms within a highly distorted octa-hedron, forming dimeric [Cu(2)(H(2)O)(8)HF(2)](3+) units by edge sharing. These units are hydrogen bonded to [FeF(6)](3-) anions and to an inter-stitial water mol-ecule...