RESUMEN
One of the most conspicuous features of a mountain belt is the main drainage divide. Divide location is influenced by a number of parameters, including tectonic uplift and horizontal advection. Thus, the topography of mountain belts can be used as an archive to extract tectonic information. Here we combine numerical landscape evolution modelling and analytical solutions to demonstrate that mountain asymmetry, determined by the location of the main drainage divide, increases with increasing uplift gradient and advection velocity. Then, we provide a conceptual framework to constrain the present or previous tectonic uplift and advection of a mountain belt from the location and migration direction of its main drainage divide. Furthermore, we apply our model to Wula Shan horst, Northeastern Sicily, and Southern Taiwan.
RESUMEN
Sinusoidal fringe pattern is widely used in optical profilometry; however, the traditional constant-frequency sinusoidal fringe pattern reduces 3D measurement accuracy in the defocus region. To this end, this paper presents a variable-frequency sinusoidal fringe pattern method that is optimized by the measurement depth. The proposed method improves the pixel matching accuracy and thus increases measurement accuracy. This paper theoretically determines the optimal frequency by analyzing the pixel matching error caused by intense noise in a captured image; presents the online frequency optimization along abscissa and ordinate axes in the sinusoidal fringe patterns; and details the encoding and decoding to use variable-frequency fringe patterns for 3D profilometry. Simulations and experiments demonstrate that our proposed method can improve the 3D measurement accuracy and increase measurement robustness.
RESUMEN
Trans-anethole (AT) has a variety of antimicrobial properties and is widely used as food functional ingredient. However, the applications of AT are limited due to its low water solubility, strong odor and low physicochemical stability. Therefore, the aim of this work was to encapsulate AT with ß-cyclodextrin (ß-CD) for obtaining inclusion complex by co-precipitation method. The measurements effectively confirmed the formation of inclusion complex between AT and ß-CD. The results showed that the inclusion complex presented new solid crystalline phases and was more thermally stable than the physical mixture and ß-CD. The phase solubility study showed that the aqueous solubility of AT was increased by being included in ß-CD. The calculated stability constant of inclusion complex was 1195M-1, indicating the strong interaction between AT and ß-CD. Furthermore, the release study suggested that ß-CD provided the protection for AT against evaporation. The release behavior of AT from the inclusion complex was controlled.
RESUMEN
Phenanthrene-degrading bacterium strain ZX4 was isolated from an oil-contaminated soil, and identified as Sphingomonas paucimobilis based on 16S rDNA sequence, cellular fatty acid composition, mol% G + C and Biolog-GN tests. Besides phenanthrene, strain ZX4 could also utilize naphthalene, fluorene and other aromatic compounds. The growth on salicylic acid and catechol showed that the strain degraded phenanthrene via salicylate pathway, while the assay of catechol 2,3-dioxygenase revealed catechol could be metabolized through meta-cleavage pathway. Three genes, including two of meta-cleavage operon genes and one of GST encoding gene were obtained. The order of genes arrangement was similar to S-type metapathway operons. The phylogenetic trees based on 16S rDNA sequence and meta-pathway gene both revealed that strain ZX4 is clustered with strains from genus Sphingomonas.
Asunto(s)
Fenantrenos/metabolismo , Sphingomonas/aislamiento & purificación , Sphingomonas/metabolismo , Secuencia de Aminoácidos , Composición de Base , Secuencia de Bases , Biodegradación Ambiental , Catecol 2,3-Dioxigenasa , ADN Bacteriano/química , ADN Bacteriano/genética , ADN Ribosómico/genética , Dioxigenasas/genética , Dioxigenasas/metabolismo , Genes Bacterianos , Glutatión Transferasa/genética , Glutatión Transferasa/metabolismo , Datos de Secuencia Molecular , Operón , Filogenia , Proteínas/genética , Proteínas/metabolismo , Microbiología del Suelo , Contaminantes del Suelo/metabolismo , Sphingomonas/genética , Sphingomonas/crecimiento & desarrolloRESUMEN
Adult somatic cell cloned calves were produced by somatic cell nuclear transfer prepared by fusion of cultured ear fibroblast from a Holstein cow into enucleated oocytes of Luxi Yellow cow. In order to determinate the source of mitochondrial DNA of cloned calves, we designed the breed-specific PCR primers by aligning the known D-loop sequences of Bos taurus and analyzed the displacement loop sequences of five live cloned calves by breed-specific primers PCR. The results demonstrated that mtDNA originated from Holstein breed and that from Luxi breed co-exist in all five live calves.
