The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform
Tingyi Leo Liu - One of the best experts on this subject based on the ideXlab platform.
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contact angle measurement of small Capillary Length liquid in super repelled state
Scientific Reports, 2017Co-Authors: Tingyi Leo Liu, Changjin Cj KimAbstract:The difficulty of measuring very large contact angles (>150 degrees) has become more relevant with the increased popularity of super-repellent surfaces. Measurement is more difficult for dynamic contact angles, for which theoretical profiles do not fit well, and small Capillary Length liquids, whose sessile droplets sag by gravity. Here, we expand the issue to the limit by investigating dynamic contact angles of liquids with an extremely small Capillary Length (<1.0 mm), empowered by the superomniphobic surface that can super-repel even fluorinated solvents, which highly wet all materials. Numerically simulating and experimentally testing 13 different liquids on the superomniphobic surface, we discover their dynamic contact angles can be measured with a consistent accuracy despite their vastly different Capillary Lengths if one keeps the lens magnification inversely proportional to the Capillary Length. Verifying the droplet equator height is a key parameter, we propose a new Bond number defined by the equator height and optical resolution to represent the measurement accuracy of large contact angles. Despite negligible improvement for most liquids today, the proposed approach teaches how to measure very large contact angles with consistent accuracy when any of the liquids in consideration has a Capillary Length below 1.0 mm.
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Contact Angle Measurement of Small Capillary Length Liquid in Super-repelled State
Scientific reports, 2017Co-Authors: Tingyi Leo Liu, Chang-jin “cj” KimAbstract:The difficulty of measuring very large contact angles (>150 degrees) has become more relevant with the increased popularity of super-repellent surfaces. Measurement is more difficult for dynamic contact angles, for which theoretical profiles do not fit well, and small Capillary Length liquids, whose sessile droplets sag by gravity. Here, we expand the issue to the limit by investigating dynamic contact angles of liquids with an extremely small Capillary Length (
Luis M. Cruz-orive - One of the best experts on this subject based on the ideXlab platform.
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Application of the fractionator and vertical slices to estimate total Capillary Length in skeletal muscle.
Journal of anatomy, 1999Co-Authors: E Artacho-pérula, R Roldán-villalobos, Luis M. Cruz-oriveAbstract:A new stereological method is proposed which combines vertical slice projections with the fractionator to estimate the total Capillary Length in a skeletal muscle. The method was demonstrated on the soleus muscle of a Wistar rat. The implementation required Capillary highlighting, tissue sampling, and data acquisition in the form of intersection counts between Capillary projections and cycloid test lines. The capillaries were demonstrated using vascular perfusion (with gelatine) of the hind leg of the rat. The sampling procedure followed the fractionator design, namely a multistage systematic sampling design with a known sampling fraction at each stage. To make the design unbiased, vertical slices were used; for efficiency, the vertical axis was chosen parallel to the main axis of the muscle. As prescribed to avoid bias, the cycloid test lines were superimposed on the slice projections, viewed under the light microscope, with their minor axes normal to the vertical axis. The estimation precision was compared for different sampling and subsampling fractions. The proposed method was globally highly efficient, unbiased, and easy to implement.
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Unbiased estimation of Capillary Length from vertical slices
Journal of Microscopy, 1995Co-Authors: S Batra, M. F. König, Luis M. Cruz-oriveAbstract:SUMMARY Previous stereological approaches to estimate feature Length include isotropic sections, which tend to be inefficient for highly anisotropic structures such as skeletal muscle capillaries, and semiparametric model-based methods, which require transverse and longitudinal sections only, but are biased to a variable, unknown degree. The recent method of vertical slices combines the advantages of both approaches, namely it is unbiased, efficient and convenient. This study illustrates for the first time how to apply the vertical slices method in biology by direct light microscopy and intersection counting with a properly orientated cycloid test system. Neither image processing nor confocal microscopy are used. The purpose of the study was to estimate Capillary Length in the left ventricle of rat heart. Beyond this, a novel histochemical method enables the staining of the venular Capillary region in red and the arteriolar Capillary region in blue, and hence estimates their separate Lengths. The vertical slices method to estimate feature Length seems to be a promising approach for biology.
Henning Laursen - One of the best experts on this subject based on the ideXlab platform.
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lung morphometry by unbiased methods in emphysema bronchial and blood vessel volume alveolar surface area and Capillary Length
Apmis, 1998Co-Authors: Britt Marie Wiebe, Henning LaursenAbstract:We have estimated lung volume, bronchial volume, vessel volume, alveolar surface area and Capillary Length in patients who died of lung failure due to emphysema and chronic obstructive pulmonary disease (COPD) and in patients with no clinical signs of respiratory disease. Unbiased morphometric methods were applied to the right lung. The patients with emphysema had equal lung volumes and bronchial and vessel volumes compared to the control group. The alveolar surface area and surface density were significantly decreased to about 67% of control values. The Capillary Length and Length density were significantly decreased to about 68% of control values. The proportional decreases in alveolar surface area and Capillary Length suggest that compensatory Capillary proliferation has not occurred. These unbiased morphometric studies of emphysema have yielded results in end-stage emphysema that are comparable to those previously reported using biased methods. However, the unbiased methods may provide new insights when applied to earlier stages of the disease.
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Human lung volume, alveolar surface area, and Capillary Length
Microscopy research and technique, 1995Co-Authors: Britt M. Wiebe, Henning LaursenAbstract:We compare the effectiveness of morphometric methods for estimating lung parameters. Various stereological methods are applied on human lungs and described in detail. The lung volume was estimated by Cavalieri's principle and by fluid displacement. Both methods are reliable, but Cavalieri's principle is superior when systematic sections are needed or when volumes of parts of the lung are wanted. Point counting demonstrated that 87.5% of the lung is parenchyma, 5.4% is vessel volume, and 7.1% is bronchia volume. Alveolar surface was estimated on vertical and isotropic uniform random tissue (IUR) sections. The Capillary Length and Length density was estimated on projected images of vertical slices (Gokhale method) and on IUR sections. Only minute differences were found whether IUR sections or vertical sections were used. Of the total variation, approximately 2% was due to the stereological variation and approximately 98% was due to the biological variation on IUR sections and vertical sections. Estimates for volumes, surfaces, and Lengths coming from model-based and design-based methods gave similar results for human lungs. In our hands, the design-based methods were easier to use and required less time. However, only the design-based methods offer the guarantee of an unbiased estimate.
Chang-jin “cj” Kim - One of the best experts on this subject based on the ideXlab platform.
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Contact Angle Measurement of Small Capillary Length Liquid in Super-repelled State
Scientific reports, 2017Co-Authors: Tingyi Leo Liu, Chang-jin “cj” KimAbstract:The difficulty of measuring very large contact angles (>150 degrees) has become more relevant with the increased popularity of super-repellent surfaces. Measurement is more difficult for dynamic contact angles, for which theoretical profiles do not fit well, and small Capillary Length liquids, whose sessile droplets sag by gravity. Here, we expand the issue to the limit by investigating dynamic contact angles of liquids with an extremely small Capillary Length (
Changjin Cj Kim - One of the best experts on this subject based on the ideXlab platform.
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contact angle measurement of small Capillary Length liquid in super repelled state
Scientific Reports, 2017Co-Authors: Tingyi Leo Liu, Changjin Cj KimAbstract:The difficulty of measuring very large contact angles (>150 degrees) has become more relevant with the increased popularity of super-repellent surfaces. Measurement is more difficult for dynamic contact angles, for which theoretical profiles do not fit well, and small Capillary Length liquids, whose sessile droplets sag by gravity. Here, we expand the issue to the limit by investigating dynamic contact angles of liquids with an extremely small Capillary Length (<1.0 mm), empowered by the superomniphobic surface that can super-repel even fluorinated solvents, which highly wet all materials. Numerically simulating and experimentally testing 13 different liquids on the superomniphobic surface, we discover their dynamic contact angles can be measured with a consistent accuracy despite their vastly different Capillary Lengths if one keeps the lens magnification inversely proportional to the Capillary Length. Verifying the droplet equator height is a key parameter, we propose a new Bond number defined by the equator height and optical resolution to represent the measurement accuracy of large contact angles. Despite negligible improvement for most liquids today, the proposed approach teaches how to measure very large contact angles with consistent accuracy when any of the liquids in consideration has a Capillary Length below 1.0 mm.
