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Research Article
Study on Characteristic Band Analysis of Soybean Protein, Soy Milk, Milk, and Coconut Milk Using SDS-PAGE Electrophoresis Technology
Zhang Yushan*,
Li Biyi,
Shen Zhihua,
Liu Yonggang
Issue:
Volume 11, Issue 6, December 2023
Pages:
189-192
Received:
Sep. 17, 2023
Accepted:
Oct. 31, 2023
Published:
Nov. 08, 2023
DOI:
10.11648/j.sd.20231106.11
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Abstract: In order to find out the characteristic bands of different kinds of proteins, this study took soybean protein, vitamin milk, milk and coconut milk as the research objects, and SDS-PAGE gel electrophoresis was used to identify the characteristic bands of the above proteins. The experimental results showed that the polyacrylamide band of soybean protein consisted of: b and c protein bands. The typical protein bands of milk protein were c and d protein bands. The typical protein bands of coconut milk protein were c, d, and e protein bands. The typical protein bands of Vitasoy protein showed b, c, and d three protein bands. The b-band was the characteristic band of soybean protein, with a molecular weight of about 35 kDa. The d-band was the characteristic band of milk protein, with a molecular weight of about 30 kDa. The e-band was the characteristic band of coconut milk protein, with a molecular weight of around 25 kDa. Based on these characteristic bands of proteins, the experimental results also suggested that Vitasoy and coconut milk contain a certain amount of milk. These results indicated that SDS-PAGE gel could be used to find the characteristic bands of different kinds of proteins. Based on these characteristic bands, molecular identification of different types of proteins can be carried out.
Abstract: In order to find out the characteristic bands of different kinds of proteins, this study took soybean protein, vitamin milk, milk and coconut milk as the research objects, and SDS-PAGE gel electrophoresis was used to identify the characteristic bands of the above proteins. The experimental results showed that the polyacrylamide band of soybean prot...
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Research Article
Evapotranspiration Characteristics of Forest and Grass Vegetation and Its Response to Environmental Factors on the Loess Plateau
Wang Fu,
Sha Xiao Yan,
He Qian,
Zhao Qiang,
Han Fen,
Zhang He
Issue:
Volume 11, Issue 6, December 2023
Pages:
193-208
Received:
Oct. 19, 2023
Accepted:
Nov. 06, 2023
Published:
Nov. 13, 2023
DOI:
10.11648/j.sd.20231106.12
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Abstract: In this paper, the evapotranspiration characteristics and water consumption rules of different types of vegetation in tree forest, shrub forest and grassland in the Loess Plateau of Longzhong region were analyzed, and the response relationship between vegetation evapotranspiration and meteorological factors was established by regression analysis method. The results showed that: (1) The monthly variation of Ea values of vegetation in this region showed an obvious inverted U-shaped bimodal variation, which the lowest Ea values were found in the germination stage of vegetation in early April and the dormancy stage of leaf litter in October, and the Ea values increased greatly in May and June with the enhancement of vegetation transpiration and soil evaporation by an average increase of 74.31%. The Ea values of all types of vegetation in this region reached the maximum value in July and August and began to decline significantly from September by an average decrease of 7.42mm and an average decrease of 24.31%. In October, the Ea values of vegetation rapidly decreased to the level of early April by an average decrease of 15.67mm and a decrease of 51.52% compared with August. (2) The difference in the perspective of spatial distribution of evapotranspiration water consumption of vegetation in this region was mainly manifested in the difference between east and west but a little difference between north and south. In Pingliang City, vegetation evapotranspiration water consumption in the east was higher than that in the west, the south was higher than that in the north, and the Jinghe River basin was higher than that in the Hulu River basin. The average difference of the total evapotranspiration water consumption of the same type of vegetation during the growth period was 19.43mm from east to west, 2.2mm from north to south, and 19.43mm from basin to basin. (3) Radiation and precipitation were the main influencing factors of Ea. Among the independent variable factors affecting evapotranspiration of forest and shrub forest, the difference of significance from large to small was the average monthly temperature, average monthly precipitation, average monthly wind speed and average monthly precipitation days. The effect of monthly mean wind speed on grassland Ea was relatively small.
Abstract: In this paper, the evapotranspiration characteristics and water consumption rules of different types of vegetation in tree forest, shrub forest and grassland in the Loess Plateau of Longzhong region were analyzed, and the response relationship between vegetation evapotranspiration and meteorological factors was established by regression analysis me...
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Research Article
Simulation Study of Temperature Field of GIL Pipe Gallery
Xu Dakun*,
Jiang Yangbin,
Wang Hao,
Ma Xiuting,
Zhang Wenke
Issue:
Volume 11, Issue 6, December 2023
Pages:
209-218
Received:
Oct. 24, 2023
Accepted:
Nov. 15, 2023
Published:
Nov. 21, 2023
DOI:
10.11648/j.sd.20231106.13
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Abstract: The thermal environment of the pipe gallery employing the gas-insulated metal-enclosed transmission lines (GIL) has a direct influence on the safe operation and service life of the line, so effectively eliminate the heat dissipation of the line can ensure the reasonable temperature distribution of the pipe gallery. The paper takes a underground GIL pipe gallery of Qingdao City as the research object and then the corresponding simulation analysis is conducted. The FLUENT software is employed to establish the physical model of GIL pipe gallery, and the ventilation mode adopting both mechanical air intake and mechanical exhaust air is set. Accordingly, the rules of indoor temperature distribution can be investigated for both normal and abnormal working conditions in winter or summer, The simulation results show that the inlet air temperature has a great influence on the temperature distribution of pipe gallery, the indoor overall temperature of the pipe gallery increases with the air supply temperature; in addition, the surrounding local temperature of GIL is too high under abnormal conditions in summer, and cannot meet the specification requirements because the temperature cannot be higher than 40°. Therefore, the timely maintenance should be conducted to avoid the occurrence of such conditions as far as possible. The research results of the paper can provide theoretical basis and technical guidance for the application of ventilation of GIL pipe gallery.
Abstract: The thermal environment of the pipe gallery employing the gas-insulated metal-enclosed transmission lines (GIL) has a direct influence on the safe operation and service life of the line, so effectively eliminate the heat dissipation of the line can ensure the reasonable temperature distribution of the pipe gallery. The paper takes a underground GIL...
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