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9 results on '"Yin, Sheng‐Nan"'

8. Preparation and Characterization of Diatomite/Ground Calcium Carbonate Composite Humidity Control Material

Author

HU Zhi-Bo, Sun Qin, Yan Yang, Yin Sheng-Nan, and Zheng Shui-Lin

Subjects
Materials science, Calcium hydroxide, Moisture, 020209 energy, Mineralogy, Humidity, 02 engineering and technology, Raw material, Inorganic Chemistry, chemistry.chemical_compound, Calcium carbonate, chemistry, Chemical engineering, Calcium silicate, 0202 electrical engineering, electronic engineering, information engineering, General Materials Science, Relative humidity, Mesoporous material
Abstract

Humidity control material is a kind of healthy environmental friendly material. The diatomite/ground calcium carbonate composite humidity control material (DE/GCC) was prepared by calcinations using diatomite (DE) and ground calcium carbonate (GCC) as raw materials. The obtained samples were characterized by X-ray diffraction, field emission scanning electron microscope, Fourier transform infrared spectroscope and low-temperature nitrogen adsorption method to determine the mineral compositions, functional groups, microstruc- ture, surface element compositions and pore structure, respectively. The moisture absorption performance of sam- ples were tested under high relative humidity conditions (RH=70%, 80%, 90%) and the constant temperature of 30 . The moisture absorption dynamics and humidity control mechanism were analyzed. It is indicated that the ℃ calcium silicate and calcium hydroxide are formed in the DE/GCC during the calcinations process. Compared with the raw materials, the content of mesopore increases in the DE/GCC sample, which is in favor of the capillary con- densation. After 36 h test in the environment with relative humidity of 70%, 80% and 90%, the moisture contents of DE/GCC reach 7.213%, 11.159% and 14.701%, which are about 2.1, 2.9 and 3.0 fold as those of DE, respectively. The moisture absorption kinetics follows the pseudo-second-order model.

Published
2016
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9. Dual-energy CT to differentiate gallbladder polyps: cholesterol versus adenomatous.

Author

Yin SN, Chi J, Liu L, Ding N, Ji YD, and Yuan JM

Subjects
Adenomatous Polyps surgery, Adult, Aged, Cholecystectomy, Cholesterol, Diagnosis, Differential, Female, Gallbladder diagnostic imaging, Gallbladder surgery, Gallbladder Neoplasms surgery, Humans, Male, Middle Aged, Polyps surgery, Radiographic Image Interpretation, Computer-Assisted methods, Reproducibility of Results, Retrospective Studies, Young Adult, Adenomatous Polyps diagnostic imaging, Gallbladder Neoplasms diagnostic imaging, Polyps diagnostic imaging, Radiography, Dual-Energy Scanned Projection methods, Tomography, X-Ray Computed methods
Abstract

Background: Dual-energy computed tomography (DE-CT) scans were acquired to identify cholesterol and adenomatous gallbladder (GB) polyps, which have not been well evaluated before surgery., Purpose: To evaluate the DE-CT findings of GB polyps 1.0-2.0 cm in size and differentiate between cholesterol and adenomatous polyps., Material and Methods: Forty-six patients with GB polyps were surgically treated from December 2017 to December 2019 and divided into two groups according to their postoperative pathologic results: a cholesterol group with 26 patients and an adenomatous group with 20 patients. All of these patients underwent DE-CT imaging with tube voltages of 80 kVp and 140 kVp within two weeks before surgery. Mean attenuation values were measured for every GB polyp at 80/140 kVp and at 40/140 keV. The mean attenuation value changes between 140 kVp and 80 kVp (MAVC 140-80 kVp ) and mean attenuation value changes between 100 keV and 40 keV (MAVC 100-40 keV ) were calculated., Results: The CT image parameters of all 46 patients with GB polyps were analyzed. There were significant differences in MAVC 140-80 kVp and MAVC 100-40 keV between cholesterol and adenomatous polyps ( P <0.05); these values were positive for cholesterol polyps and negative for adenomatous polyps., Conclusion: The unique energy spectrum information provided by DE-CT scans is helpful in differentiating between cholesterol and adenomatous polyps 1.0-2.0 cm in size.

Published
2021
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