9 results on '"Yunshuang Wang"'
Search Results
2. Advances in Research Into and Applications of Heterotrophic Nitrifying and Aerobic Denitrifying Microorganisms
- Author
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Weilai Fu, Guolong Song, Yunshuang Wang, Qiang Wang, Peifeng Duan, Chao Liu, Xian Zhang, and Zhiming Rao
- Subjects
heterotrophic nitrifying ,aerobic denitrifying ,nitrogen biotransformation pathway ,influencing factors ,HNADs ,Environmental sciences ,GE1-350 - Abstract
With the increasing use of animal and plant proteins, pollution due to nitrogen sources is attracting increasing attention. In particular, the amount of nitrogen-containing sewage discharged into the environment has increased significantly, causing eutrophication of water bodies and environmental degradation of water quality. Traditionally, nitrifying bacteria perform ammonia nitrification under aerobic conditions, while denitrifying bacteria perform nitrate/nitrite denitrification under anaerobic conditions. However, heterotrophic nitrifying and aerobic denitrifying microorganisms (HNADs) perform ammonia nitrification and nitrate/nitrite denitrification under the same aerobic conditions using an organic carbon source, which is a much simpler and more efficient process. In this review, the distribution and evolutionary relationships of novel HNADs strains are presented, and the influencing factors, metabolic pathways, key enzymes, and practical applications of HNADs are reviewed.
- Published
- 2022
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3. Temperature Drift Compensation of a MEMS Accelerometer Based on DLSTM and ISSA
- Author
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Gangqiang Guo, Bo Chai, Ruichu Cheng, and Yunshuang Wang
- Subjects
MEMS accelerometer ,temperature drift ,real-time compensation model ,DLSTM + ISSA ,Chemical technology ,TP1-1185 - Abstract
In order to improve the performance of a micro-electro-mechanical system (MEMS) accelerometer, three algorithms for compensating its temperature drift are proposed in this paper, including deep long short-term memory recurrent neural network (DLSTM-RNN, short DLSTM), DLSTM based on sparrow search algorithm (SSA), and DLSTM based on improved SSA (ISSA). Moreover, the piecewise linear approximation (PLA) method is employed in this paper as a comparison to evaluate the impact of the proposed algorithm. First, a temperature experiment is performed to obtain the MEMS accelerometer’s temperature drift output (TDO). Then, we propose a real-time compensation model and a linear approximation model for neural network methods compensation and PLA method compensation, respectively. The real-time compensation model is a recursive method based on the TDO at the last moment. The linear approximation model considers the MEMS accelerometer’s temperature and TDO as input and output, respectively. Next, the TDO is analyzed and optimized by the real-time compensation model and the three algorithms mentioned before. Moreover, the TDO is also compensated by the linear approximation model and PLA method as a comparison. The compensation results show that the three neural network methods and the PLA method effectively compensate for the temperature drift of the MEMS accelerometer, and the DLSTM + ISSA method achieves the best compensation effect. After compensation by DLSTM + ISSA, the three Allen variance coefficients of the MEMS accelerometer that bias instability, rate random walk, and rate ramp are improved from 5.43×10−4mg, 4.33×10−5mg/s12, 1.18×10−6mg/s to 2.77×10−5mg, 1.14×10−6mg/s12, 2.63×10−8mg/s, respectively, with an increase of 96.68% on average.
- Published
- 2023
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4. Isolation and Identification of an Efficient Aerobic Denitrifying Pseudomonas stutzeri Strain and Characterization of Its Nitrite Degradation
- Author
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Weilai Fu, Qiang Wang, Shuhui Chen, Yunshuang Wang, Yaru Wang, Peifeng Duan, Ganfeng Yi, Chao Liu, Xian Zhang, and Zhiming Rao
- Subjects
nitrogen pollution ,nitrite removal ,domestication ,Pseudomonas stutzeri ,Chemical technology ,TP1-1185 ,Chemistry ,QD1-999 - Abstract
Nitrogen pollution in water bodies is becoming increasingly serious, and how to remove nitrogen from water bodies economically and effectively has become a research hotspot. Especially in recent years, with the gradual expansion of aquaculture in China, the content of nitrite and other nitrogen-containing substances in water bodies has been increasing, which inhibits the growth of farm animals and is one of the causes of eutrophication in water bodies. In this study, a strain of bacteria was isolated from the sludge of an aquaculture fishpond and identified as Pseudomonas stutzeri, which can efficiently degrade nitrite. After continuous domestication in nitrite mixed solution, the nitrite nitrogen reduction capacity of P. stutzeri was significantly improved. Univariate experiments aiming to optimize the degradation conditions indicate that the optimal culture conditions for strain F2 are: medium with a carbon source of sodium succinate; C/N of 18; pH of 8; culture temperature of 28 °C; and shaking speed of 210 rpm in the shaker. Under the optimal culture conditions, the NO2−-N concentration of the culture solution was 300 mg/L, and the nitrite removal rate reached 98.67%. Meanwhile, the results of the nitrogen balance test showed that the strain converted 6.1% of the initial nitrogen into cellular organic nitrogen and 62.3% into gaseous nitrogen.
- Published
- 2021
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- View/download PDF
5. Clinical significance of the combined test of seven blood coagulation indexes, lipids and platelet agglutination on hypercoagulable state of blood in parturient women.
- Author
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Wenjuan Zhang, Tao Yu, Yunshuang Wang, Meili Hu, and Tianxiang Gao
- Subjects
BLOOD coagulation tests ,PARTIAL thromboplastin time ,THROMBIN time ,AGGLUTINATION ,BLOOD platelets - Abstract
Objective: To investigate the value of the combined test of seven blood coagulation indexes, lipids and platelet agglutination on the evaluation of the hypercoagulable state of blood in parturient women. Methods: This is a retrospective study. Total 50 high risk parturient women who underwent an antenatal examination in Baoding Maternal and Child Health Hospital from June 2021 to January 2023 were selected as the observation group, while 50 normal parturient women who underwent antenatal examination without comorbidities and complications were randomly collected in a ratio of 1:1 as the control group. All subjects had venous blood drawn for testing of seven blood coagulation indexes, lipids and platelet agglutination before delivery, and their general data were recorded. Results: The activated partial thromboplastin time(APTT) in the observation group was lower than that in the control group, while thrombin time(TT) and D-dimer(DD) were both higher than those in the control group, with statistically significant differences(p<0.05); total cholesterol (TC) and triglyceride (TG) in the observation group were both higher than those in the control group, with statistically significant differences (p<0.05); adenosine diphosphate (ADP) and arachidonic acid (AA) in the observation group were both higher than those in the control group, with statistically significant differences (p<0.05). Moreover, the overall incidence of adverse pregnancy was higher in the observation group than in the control group, with a statistically significant difference (p<0.05). Conclusions: The combined test of seven blood coagulation indexes, lipids and platelet agglutination results in excellent performance in predicting and judging the presence or absence of the hypercoagulable state of blood in parturient women, with the combination of APTT+TT+DD+TG+ADP+AA being the preferred test. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
6. Separation and Purification of Hyaluronic Acid from Fermentation Broth
- Author
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Jian Zhang, Yunshuang Wang, and Hao Liu
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Chitosan ,chemistry.chemical_compound ,Chromatography ,Membrane ,biology ,chemistry ,Volume (thermodynamics) ,Microfiltration ,Streptococcus zooepidemicus ,Ultrafiltration ,Fermentation ,biology.organism_classification ,Separation process - Abstract
The objective of this research was to compare different methods for the separation and purification of hyaluronic acid from Streptococcus zooepidemicus ATCC39920 for their ease of use and reliability. The most appropriate conditions of pretreatment stage were heated to 70 °C for 1 h and kept at room temperature for 5 h. The fermented broth was diluted with the equal volume deionized water. Ten milligrams chitosan was slowly added to 1 L of solution with stirring for 30 min, followed by the addition 20 g diatomaceous earth-type filter aid. The mixture was stirring for 1 h. Then, the mixture was filtrated with diatomite, microfiltration (MF) membranes (5 μm in pore diameter), and ultrafiltration (UF) membranes (MWCO 50KD) to achieve the separation stage.The retentate was washed by the equal volume deionized water and when the volume concentration ratio (VCR) reached 4, the UF stage ended. Finally, the purification procedure adopted Sevag process to remove protein. The overall yield of HA could reach 62.53 % and the removal rate of protein could reach 95.22 %.
- Published
- 2013
7. Apparent Digestibilities of Selected Feed Ingredients Fermented by Host Bacteria in Juvenile Turbot, Scophthalmus maxima L.
- Author
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Beili Zhang, Chaoqun Li, Xin Wang, Xionge Pi, Yunshuang Wang, Xuan Wang, Huihui Zhou, Kangsen Mai, and Gen He
- Subjects
FISH feeds ,PSETTA maxima ,PLANT proteins ,AMINO acids ,AQUACULTURE - Abstract
Fermentation is considered a promising method to improve the limited utilization of plant protein sources. In the present study, Shewanella sp. MR-7, isolated from the intestine of juvenile turbot, was used to ferment selected plant sources. We investigated the apparent digestibility coefficients (ADCs) of three plant sources fermented and not fermented by Shewanella sp. MR-7 in diets of juvenile turbot: soybean meal (SBM), fermented soybean meal (FSBM), peanut meal (PM), fermented peanut meal (FPM), corn gluten meal (CGM) and fermented corn gluten meal (FCGM). The ADCs of dry matter (DM), crude protein (CP), gross energy (GE), and amino acids(AA)were analyzed. Our results showed that the ADC of the plant protein sources improved significantly with fermentation. Moreover, the FSBM showed the highest improvement for apparent amino acid digestibility while FPM showed the lowest compared with the unfermented plant protein source. In conclusion, our results indicated that Shewanella sp. MR-7 fermentation can greatly improve the ADCs of SBM, PM, and CGM in diets of turbot. This study provided valuable information for the use of host bacteria as zymocyte in aquaculture. [ABSTRACT FROM AUTHOR]
- Published
- 2018
8. Study on Treatment of Domestic Wastewater by Submerged Flat MBR
- Author
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Y.H. Xie, Yunshuang Wang, Yingchun Wang, H.J. Zhang, and Tong Zhu
- Subjects
Industrial wastewater treatment ,Wastewater ,Chemistry ,Membrane fouling ,Environmental engineering ,Sewage sludge treatment ,Sewage treatment ,Membrane bioreactor ,Effluent ,Mixed liquor suspended solids - Abstract
The treatment of dormitory and refectory mixed wastewater by a submerged flat membrane bioreactor (MBR) was studied. The A/O MBR system treated wastewater 4 m3/d. The mean removal efficiency of BOD5 and CODCr was more than 95% with the influent concentration of 100~500 mg/L BOD5 and 120-900 mg/L CODCr. It was proved that active carbon treatment reduced effluent chroma effectively. At the steady working period (MLSS 8,000~15,000 mg/L), TN and NH3-N removal efficiencies were more than 85%, and that of TP was between 50% and 95%. Besides, this paper studied the membrane fouling mechanism and revealed that membrane fouling was affected by MLSS, particle size distribution of sludge and composition of raw water. We found that the diameter of sludge particles changes with the MLSS. We also found the small particles caused membrane fouling. The results proved that submerged flat MBR was suitable to treat small-or-medium-size domestic and industrial wastewater and would have a promising future.
- Published
- 2007
9. Clinical significance of the combined test of seven blood coagulation indexes, lipids and platelet agglutination on hypercoagulable state of blood in parturient women.
- Author
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Zhang W, Yu T, Wang Y, Hu M, and Gao T
- Abstract
Objective: To investigate the value of the combined test of seven blood coagulation indexes, lipids and platelet agglutination on the evaluation of the hypercoagulable state of blood in parturient women., Methods: This is a retrospective study. Total 50 high risk parturient women who underwent an antenatal examination in Baoding Maternal and Child Health Hospital from June 2021 to January 2023 were selected as the observation group, while 50 normal parturient women who underwent antenatal examination without comorbidities and complications were randomly collected in a ratio of 1:1 as the control group. All subjects had venous blood drawn for testing of seven blood coagulation indexes, lipids and platelet agglutination before delivery, and their general data were recorded., Results: The activated partial thromboplastin time(APTT) in the observation group was lower than that in the control group, while thrombin time(TT) and D-dimer(DD) were both higher than those in the control group, with statistically significant differences(p<0.05); total cholesterol (TC) and triglyceride (TG) in the observation group were both higher than those in the control group, with statistically significant differences (p<0.05); adenosine diphosphate (ADP) and arachidonic acid (AA) in the observation group were both higher than those in the control group, with statistically significant differences (p<0.05). Moreover, the overall incidence of adverse pregnancy was higher in the observation group than in the control group, with a statistically significant difference (p<0.05)., Conclusions: The combined test of seven blood coagulation indexes, lipids and platelet agglutination results in excellent performance in predicting and judging the presence or absence of the hypercoagulable state of blood in parturient women, with the combination of APTT+TT+DD+TG+ADP+AA being the preferred test., Competing Interests: Declaration of conflicting interest: None., (Copyright: © Pakistan Journal of Medical Sciences.)
- Published
- 2024
- Full Text
- View/download PDF
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