Advanced applications such as neurosurgical planning and simulation require both surface and interior anatomical information in order to be truly effective. We are developing a segmentation scheme based on collections of active surface templates embedded within an active volume. This composite system encodes high-level anatomical knowledge of both cortical surface and interior brain structures ...

We study the task of object part extraction and labeling, which seeks to understand objects beyond simply identifiying their bounding boxes. We start from bottom-up segmentation of images and search for correspondences between object parts in a few shape models and segments in images. Segments comprising different object parts in the image are usually not equally salient due to uneven contrast,...

Twenty-two ionic and nonionic surface-active agents were applied to a standardized pea root meristem test system. Mitosis was inhibited by 16 surfactants at concentrations of 0.1% v/v. Two surfactants caused a slight depression in the mitotic index; the remaining four had no recognizable effect. Several compounds were irreversibly toxic at levels of 0.1% v/v. Five of the six known biodegradable...

Quaternary quinolinium salts differing in alkyl chain length are members of a widespread group of cationic surfactants. These compounds have numerous applications in various branches of industry and research. In this work, the preparation of quinoline-derived cationic surface active agents differing in the length of the side alkyl chains (from C₈ to C₂₀) is described. An HPLC method was success...

To simply reduce HAuCl(4) using 2-thiophenemethanol in an aqueous solution at room temperature, a novel metallic Au nanostructure with a high SERS activity was obtained. Flat sheet-like Au nanoleaves possessing many nanogap hotspots bound with a large percentage of high-index facets were obtained.

Growth of Stapylococcus aureus in various ionic surface-active agents resulted in loss of the ability to produce penicillinase, whereas growth in nonionic surface-active agents had no effect on penicillinase production. The curing effect of various alkyl sulfates was found to be dependent upon the chain length. Curing by surface-active agents could be inhibited by magnesium. Reciprocal transduc...

A universal surface modification for glass and fused silica microchannels has been developed. The method allows for the formation of catalytic surfaces within a channel after channel closure. These surfaces can contain ligand systems or functionalities of choice covalently attached to the robust surface modification. The utility of the system is demonstrated by the formation of Jacobsen and Gla...

UNLABELLED Bacteria produce a variety of biosurfactants capable of significantly reducing liquid (aqueous) surface tension (γ) with a range of biological roles and biotechnological uses. To determine the lowest achievable surface tension (γMin ), we tested a diverse collection of Pseudomonas-like isolates from contaminated soil and activated sludge and identified those expressing biosurfactants...

Abstract. Surface active compounds (surfactants) are frequently found in atmospheric aerosols and droplets. As they adsorb to the surfaces of microscopic systems, surfactants can decrease aqueous surface tension simultaneously deplete bulk concentration. These processes may influence activation into cloud droplets investigation their role microphysics has been ongoing for decades. In this work,...