نتایج جستجو برای: pristine environment

تعداد نتایج: 523838  

Journal: :Environmental monitoring and assessment 2013
Michael H Kido

Based upon ecological data provided by a 6-year study of native species assemblage structure and function in near-pristine Limahuli Stream (Kauai), The Hawaii Stream Index of Biological Integrity (HS-IBI) incorporates 11 metrics covering five ecological categories (taxonomic richness, sensitive species, reproductive capacity, trophic-habitat capacity, and tolerance capacity). The HS-IBI was sho...

Journal: :Nature nanotechnology 2013
Zhaohui Zhong

C arbon nanomaterials such as carbon nanotubes 1 and graphene 2 are low-dimensional materials that can have defect-free lattices over microscopic length scales, which is a feature that only a few other nanomaterials can offer. Despite the excitement that these materials have generated in the condensed-matter physics community due to their potential as playgrounds for quantum transport study, th...

Journal: :The Journal of chemical physics 2012
Davide Vanzo Dusan Bratko Alenka Luzar

Graphane is a hydrogenated form of graphene with high bandgap and planar structure insensitive to a broad range of chemical substitutions. We describe an atomistic simulation approach to predict wetting properties of this new material. We determine the contact angle to be 73°. The lower hydrophobicity compared to graphene is explained by the increased planar density of carbon atoms while we dem...

2008
Chaozong Liu Brian J. Meenan

This paper reports the adsorption of Bovine Serum Albumin (BSA) onto Dielectric Barrier Discharge (DBD) processed Poly(methyl methacrylate) (PMMA) surfaces by a Quartz Crystal Microbalance with Dissipation monitoring (QCM-D) technique. The purpose is to study the influence of DBD processing on the nature and scale of BSA adsorption on PMMA surface in vitro. It was observed that DBD processing i...

2012
Elizabeth M. P. Madin Steven D. Gaines Joshua S. Madin Anne-Katrin Link Peggy J. Lubchenco Rebecca L. Selden Robert R. Warner

Efforts to restore top predators in human-altered systems raise the question of whether rebounds in predator populations are sufficient to restore pristine foodweb dynamics. Ocean ecosystems provide an ideal system to test this question. Removal of fishing in marine reserves often reverses declines in predator densities and size. However, whether this leads to restoration of key functional char...

Journal: :Mathematical and Computer Modelling 1989

Journal: :Clinical oral implants research 2014
P Galindo-Moreno A Fernández-Jiménez G Avila-Ortiz F J Silvestre P Hernández-Cortés H L Wang

OBJECTIVES To assess differences in marginal bone loss around implants placed in maxillary pristine bone and implants placed following maxillary sinus augmentation over a period of 3 years after functional loading. MATERIAL AND METHODS Two cohorts of subjects (Group 1: Subjects who received sinus augmentation with simultaneous implant placement; Group 2: Subjects who underwent conventional im...

2013
Lin Zhang Hu Huang Hongwei Zhao Zhichao Ma Yihan Yang Xiaoli Hu

The physical properties of the machining-induced new surface depend on the performance of the initial defect surface and deformed layer in the subsurface of the bulk material. In this paper, three-dimensional molecular dynamics simulations of nanoindentation are preformed on the single-point diamond turning surface of single-crystal copper comparing with that of pristine single-crystal face-cen...

Journal: :Physical chemistry chemical physics : PCCP 2015
Xiao Zhang Mingshan Zhu Penglei Chen Yongjun Li Huibiao Liu Yuliang Li Minghua Liu

Advanced functional hybrids based on carbon materials (CMs) represent one of the main achievements of scientific communities. To achieve the hybridization, pristine CMs have to be chemically modified, or surfactants, which are nonfunctional for the performances of the hybrids, have to be employed as a cross-linkage. The construction of pristine CM-based hybrids using dual-functional coupling re...

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