It is known that ice growing freely from supercooled water has a morphological transition at T= -2.7C, from a flat dendritic structure at higher temperatures to a twelve-sided doublepyramid structure at lower temperatures. The double-pyramid structure, which can be described as two hollow six-sided pyramids joined at their apices, is built from dendrites growing in well defined growth direction...

Phages encoding production of Vero cytotoxins VT1 or VT2 were isolated from strains of Escherichia coli of human and bovine origin. Two human strains of serotype O157: H7 produced both VT1 and VT2 and each carried two separate phages encoding either VT1 or VT2. The phages were morphologically similar to each other and to a VT2 phage previously isolated from a strain of serotype O157: H-; all ha...

PURPOSE The aim of this study was to describe and compare endothelial cell parameters and central corneal thickness (CCT) in four different groups of patients (patients with cataract, patients with glaucoma, elderly healthy subjects, and young healthy subjects) and identify correlations between these characteristics, patient age, and sex. METHODS Before conducting invasive procedures, 104 pat...

In 8-day-old embryos stereocilia can be identified on the hair cells of the chick cochlea; within each is a small population of actin filaments which extend from the tip of the stereocilium to the apical cytoplasm of the cell. These filaments are not ordered in a regular way, however, and tend to be found near the lateral margins of the stereocilia with large spaces between adjacent filaments. ...

Bamboo weaving is an intangible cultural heritage in China. Exploring people’s aesthetic preferences for bamboo patterns to better serve the design of architectural decoration can help promote upgrading traditional crafts. This study explored differences between genders oculomotor indicators different through eye-movement experimental combined with a subjective questionnaire explore whether hav...

the first geometric-arithmetic index was introduced in the chemical theory as the summationof 2 du dv /(du  dv ) overall edges of the graph, where du stand for the degree of the vertexu. in this paper we give the expressions for computing the first geometric-arithmetic index ofhexagonal systems and phenylenes and present new method for describing hexagonal systemby corresponding a simple graph...

With the rapid development of earth observation, satellite navigation, mobile communication, and other technologies, order magnitude spatial data we acquire accumulate is increasing, higher requirements are put forward for application storage data. As a new form management, global discrete grid can be used efficient large-scale data, which digital multiresolution georeference model that helps t...

Solar greenhouse occupies a large proportion of types in China and is the most widely used agricultural facility northern China. The application solar agriculture mainly to cultivate fruits, vegetables flowers, bottom surface rectangular. So this paper, based on regular hexagon, with hexagonal structure designed, miniature model constructed according scale. Then select some reasonable component...

Adjunct Hexagonal Array Token Petri Net Structures (AHPN) are recently introduced hexagonal picture generating devices which extended the Hexagonal Array Token Petri Net Structures . In this paper we consider AHPN model along with a control feature called inhibitor arcs and compare it with some expressive hexagonal picture generating and recognizing models with respect to the generating power.

Double hexagonal chains” can be considered as benzenoids constructed by successive fusions of successive naphthalenes along a zig-zag sequence of triples of edges as appear on opposite sides of each naphthalene unit. In this paper, we discuss the numbers of k-matchings and k-independent sets of double hexagonal chains, as well as Hosoya indices and Merrifield–Simmons indices, and obtain some ex...