20 results on '"Yu, Sheng Qin"'
Search Results
2. Establishment and effectiveness evaluation of pre-test probability model of coronary heart disease combined with cardiopulmonary exercise test indexes
- Author
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Liu, Si Xu, Yu, Sheng Qin, Yang, Kai Jing, Liu, Ji Yi, Yang, Fan, Li, Ye, Yao, Chang Li, Zhao, Guang Sheng, and Sun, Feng Zhi
- Published
- 2023
- Full Text
- View/download PDF
3. Soil carbon sequestration under long-term rice-based cropping systems of purple soil in Southwest China
- Author
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Hong-zhu FAN, Qing-rui CHEN, Yu-sheng QIN, Kun CHEN, Shi-hua TU, Ming-gang XU, and Wen-ju ZHANG
- Subjects
rice-based cropping systems ,long-term fertilization ,soil organic carbon ,purple soil ,Agriculture (General) ,S1-972 - Abstract
Carbon sequestration in agricultural soils is a complex process controlled by farming practices, climate and some other environment factors. Since purple soils are unique in China and used as the main cropland in Sichuan Basin of China, it is of great importance to study and understand the impacts of different fertilizer amendments on soil organic carbon (SOC) changes with time. A research was carried out to investigate the relationship between soil carbon sequestration and organic carbon input as affected by different fertilizer treatments at two long-term rice-based cropping system experiments set up in early 1980s. Each experiment consisted of six identical treatments, including (1) no fertilizer (CK), (2) nitrogen and phosphorus fertilizers (NP), (3) nitrogen, phosphorus and potassium fertilizers (NPK), (4) fresh pig manure (M), (5) nitrogen and phosphorus fertilizers plus manure (MNP), and (6) nitrogen, phosphorus and potassium fertilizers plus manure (MNPK). The results showed that annual harvestable carbon biomass was the highest in the treatment of MNPK, followed by MNP and NPK, then M and NP, and the lowest in CK. Most of fertilizer treatments resulted in a significant gain in SOC ranging from 6.48 to 29.13% compared with the CK, and raised soil carbon sequestration rate to 0.10–0.53 t ha−1 yr−1. Especially, addition of manure on the basis of mineral fertilizers was very conducive to SOC maintenance in this soil. SOC content and soil carbon sequestration rate under balanced fertilizer treatments (NPK and MNPK) in the calcareous purple soil (Suining) were higher than that in the acid purple soil (Leshan). But carbon conversion rate at Leshan was 11.00%, almost 1.5 times of that (7.80%) at Suining. Significant linear correlations between soil carbon sequestration and carbon input were observed at both sites, signifying that the purple soil was not carbon-saturated and still had considerable potential to sequestrate more carbon.
- Published
- 2015
- Full Text
- View/download PDF
4. Intrusion Detection System Based on Immune Algorithm and Support Vector Machine in Wireless Sensor Network.
- Author
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Yu Sheng Chen, Yu Sheng Qin, Yu Gui Xiang, Jing Xi Zhong, and Xu Long Jiao
- Published
- 2010
- Full Text
- View/download PDF
5. Microtubule affinity regulating kinase 4: A promising target in the pathogenesis of atherosclerosis
- Author
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Yu-Sheng Qin, Zongbao Wang, Shu-Zhi Wang, Chao-Ke Tang, and Heng Li
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biology ,Physiology ,Kinase ,Chemistry ,Clinical Biochemistry ,Inflammation ,Lipid metabolism ,Cell Biology ,Protein Serine-Threonine Kinases ,Atherosclerosis ,medicine.disease_cause ,Microtubules ,Cell biology ,Insulin receptor ,Microtubule ,medicine ,biology.protein ,Humans ,Glucose homeostasis ,Phosphorylation ,medicine.symptom ,Oxidative stress ,Signal Transduction - Abstract
Microtubule affinity regulating kinase 4 (MARK4), an important member of the serine/threonine kinase family, regulates the phosphorylation of microtubule-associated proteins and thus modulates microtubule dynamics. In human atherosclerotic lesions, the expression of MARK4 is significantly increased. Recently, accumulating evidence suggests that MARK4 exerts a proatherogenic effect via regulation of lipid metabolism (cholesterol, fatty acid, and triglyceride), inflammation, cell cycle progression and proliferation, insulin signaling, and glucose homeostasis, white adipocyte browning, and oxidative stress. In this review, we summarize the latest findings regarding the role of MARK4 in the pathogenesis of atherosclerosis to provide a rationale for future investigation and therapeutic intervention.
- Published
- 2021
6. TIGAR mitigates atherosclerosis by promoting cholesterol efflux from macrophages
- Author
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Ling-Xiao Liao, Xiao-Hua Yu, Heng Li, Yao Wu, Shang-Ming Liu, Xiang-Jun Wan, Min Zhang, Li Zhou, Jin Zou, Yu-Sheng Qin, Chao-Ke Tang, and Zhen-Wang Zhao
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0301 basic medicine ,Mice, Knockout, ApoE ,030204 cardiovascular system & hematology ,03 medical and health sciences ,chemistry.chemical_compound ,Mice ,0302 clinical medicine ,CYP27A1 ,Animals ,Glycolysis ,Liver X receptor ,Liver X Receptors ,Gene knockdown ,biology ,Chemistry ,Cholesterol ,Macrophages ,Reverse cholesterol transport ,Atherosclerosis ,Phosphoric Monoester Hydrolases ,Cell biology ,030104 developmental biology ,ABCG1 ,ABCA1 ,biology.protein ,lipids (amino acids, peptides, and proteins) ,Cardiology and Cardiovascular Medicine ,Apoptosis Regulatory Proteins ,ATP Binding Cassette Transporter 1 ,Foam Cells - Abstract
Background and aims TP53-induced glycolysis and apoptosis regulator (TIGAR) is now characterized as a fructose-2,6-bisphosphatase to reduce glycolysis and protect against oxidative stress. Recent studies have demonstrated that TIGAR is associated with cardiovascular disease. However, little is known about its role in atherosclerogenesis. In this study, we aimed to investigate the effect of TIGAR on atherosclerosis and explore the underlying molecular mechanism. Methods The Gene Expression Omnibus (GEO) datasets were used to analyze the differential expression of relative proteins. THP-1-derived macrophages were used as an in vitro model and apolipoprotein E-deficient (Apoe−/−) mice were used as an in vivo model. [3H] labeled cholesterol was used to assess the capacity of cholesterol efflux and reverse cholesterol transport (RCT). Both qPCR and Western blot were used to evaluate the mRNA and protein expression, respectively. Lentiviral vectors were used to disturb the expression of TIGAR in vitro and in vivo. Oil Red O, hematoxylin-eosin, and Masson staining were performed to evaluate atherosclerotic plaques in Apoe−/− mice fed a Western diet. Conventional assay kits were used to measure the levels of reactive oxygen species (ROS), plasma lipid profiles and 27-hydroxycholesterol (27-HC). Results Our results showed that TIGAR is increased upon the formation of macrophage foam cells and atherosclerosis. TIGAR knockdown markedly promoted lipid accumulation in macrophages. Silencing of TIGAR impaired cholesterol efflux and down-regulated the expression of ATP-binding cassette transporter A1 (ABCA1) and ABCG1 by interfering with liver X receptor α (LXRα) expression and activity, but did not influence cholesterol uptake by macrophages. Additionally, this inhibitory effect of TIGAR deficiency on cholesterol metabolism was mediated through the ROS/CYP27A1 pathway. In vivo experiments revealed that TIGAR deficiency decreased the levels of ABCA1 and ABCG1 in plaques and aorta and impaired the capacity of RCT, thereby leading to the progression of atherosclerosis in Apoe−/− mice. Conclusions TIGAR mitigates the development of atherosclerosis by up-regulating ABCA1 and ABCG1 expression via the ROS/CYP27A1/LXRα pathway.
- Published
- 2020
7. Long non-coding RNA PCA3 inhibits lipid accumulation and atherosclerosis through the miR-140-5p/RFX7/ABCA1 axis
- Author
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Jin Zou, Zhen-Wang Zhao, Xiao-Hua Yu, Heng Li, Gang Wang, Ling-Xiao Liao, Xiang-Jun Wan, Min Zhang, Chao-Ke Tang, Yu-Sheng Qin, and Li Zhou
- Subjects
0301 basic medicine ,THP-1 Cells ,Regulatory Factor X Transcription Factors ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Downregulation and upregulation ,Western blot ,microRNA ,medicine ,Oil Red O ,Humans ,Molecular Biology ,Reporter gene ,biology ,medicine.diagnostic_test ,Chemistry ,Reverse cholesterol transport ,Cell Biology ,Atherosclerosis ,Lipid Metabolism ,Cell biology ,MicroRNAs ,030104 developmental biology ,030220 oncology & carcinogenesis ,ABCA1 ,biology.protein ,lipids (amino acids, peptides, and proteins) ,RNA, Long Noncoding ,Chromatin immunoprecipitation ,ATP Binding Cassette Transporter 1 ,Signal Transduction - Abstract
Objective The purpose of this study was to explore the role of long noncoding RNA (lncRNA) prostate cancer antigen 3 (PCA3) in atherosclerosis and the underlying mechanism. Methods The Gene Expression Omnibus (GEO) datasets were used to divide differentially expressed lncRNAs, microRNAs (miRNAs), and mRNAs. The expression of PCA3, miR-140-5p, RFX7 and ABCA1 were determined by qPCR or Western blot in ox-LDL-treated macrophages. Macrophage lipid accumulation s was evaluated using the Oil Red O staining and high-performance liquid chromatography. Target relationships among PCA3, miR-140-5p, RFX7, and ABCA1 promoter area were validated via dual-luciferase reporter gene assay or chromatin immunoprecipitation assay. The apoE−/− mouse model in vivo was designed to evaluate the effect of PCA3 on the reverse cholesterol transport (RCT) and atherosclerosis. Results PCA3 was down-regulated in foam cells, whereas miR-140-5p was highly expressed. Overexpression of PCA3 promoted ABCA1-mediated cholesterol efflux and reduced lipid accumulation in macrophages. Besides, RFX7 bound to the ABCA1 promoter and increased ABCA1 expression. Targeted relationships and interactions on the expression between miR-140-5p and PCA3 or RFX7 were elucidated. PCA3 up-regulated ABCA1 expression by binding to miR-140-5p to up-regulate RFX7 and ABCA1 expression in macrophages. PCA3 promoted RCT and impeded the progression of atherosclerosis by sponging miR-140-5p in apoE−/− mice. Meanwhile, miR-140-5p also inhibit ABCA1 expression via downregulation of RFX7 to impede RCT and aggravate atherosclerosis. Conclusions lncRNA PCA3 promotes ABCA1-mediated cholesterol efflux to inhibit atherosclerosis through sponging miR-140-5p and up-regulating RFX7.
- Published
- 2020
8. Soil carbon sequestration under long-term rice-based cropping systems of purple soil in Southwest China
- Author
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Yu-sheng Qin, Wen-ju Zhang, Qing-rui Chen, Ming-gang Xu, Shi-hua Tu, Fan Hongzhu, and Kun Chen
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Agriculture (General) ,chemistry.chemical_element ,Plant Science ,Carbon sequestration ,engineering.material ,Biochemistry ,S1-972 ,Food Animals ,long-term fertilization ,Ecology ,rice-based cropping systems ,Phosphorus ,Soil organic matter ,Soil chemistry ,Soil carbon ,Manure ,soil organic carbon ,Agronomy ,chemistry ,Soil water ,engineering ,Environmental science ,Animal Science and Zoology ,Fertilizer ,Agronomy and Crop Science ,Food Science ,purple soil - Abstract
Carbon sequestration in agricultural soils is a complex process controlled by farming practices, climate and some other environment factors. Since purple soils are unique in China and used as the main cropland in Sichuan Basin of China, it is of great importance to study and understand the impacts of different fertilizer amendments on soil organic carbon (SOC) changes with time. A research was carried out to investigate the relationship between soil carbon sequestration and organic carbon input as affected by different fertilizer treatments at two long-term rice-based cropping system experiments set up in early 1980s. Each experiment consisted of six identical treatments, including (1) no fertilizer (CK), (2) nitrogen and phosphorus fertilizers (NP), (3) nitrogen, phosphorus and potassium fertilizers (NPK), (4) fresh pig manure (M), (5) nitrogen and phosphorus fertilizers plus manure (MNP), and (6) nitrogen, phosphorus and potassium fertilizers plus manure (MNPK). The results showed that annual harvestable carbon biomass was the highest in the treatment of MNPK, followed by MNP and NPK, then M and NP, and the lowest in CK. Most of fertilizer treatments resulted in a significant gain in SOC ranging from 6.48 to 29.13% compared with the CK, and raised soil carbon sequestration rate to 0.10–0.53 t ha−1 yr−1. Especially, addition of manure on the basis of mineral fertilizers was very conducive to SOC maintenance in this soil. SOC content and soil carbon sequestration rate under balanced fertilizer treatments (NPK and MNPK) in the calcareous purple soil (Suining) were higher than that in the acid purple soil (Leshan). But carbon conversion rate at Leshan was 11.00%, almost 1.5 times of that (7.80%) at Suining. Significant linear correlations between soil carbon sequestration and carbon input were observed at both sites, signifying that the purple soil was not carbon-saturated and still had considerable potential to sequestrate more carbon.
- Published
- 2015
9. Artesunate inhibits atherosclerosis by upregulating vascular smooth muscle cells-derived LPL expression via the KLF2/NRF2/TCF7L2 pathway
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Chao-Ke Tang, Ming-Xin Chen, Jia-Hui Gao, Feng-Jiao Wen, Yu-Sheng Qin, Lin-Hao He, Jing-Jing Luo, Da-Wei Zhang, Xiao-Hua Yu, and Zongbao Wang
- Subjects
Male ,0301 basic medicine ,Vascular smooth muscle ,Mice, Knockout, ApoE ,NF-E2-Related Factor 2 ,Myocytes, Smooth Muscle ,Kruppel-Like Transcription Factors ,Artesunate ,Diet, High-Fat ,Muscle, Smooth, Vascular ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Western blot ,Downregulation and upregulation ,In vivo ,medicine ,Animals ,Oil Red O ,Aorta ,Cells, Cultured ,Pharmacology ,Lipoprotein lipase ,medicine.diagnostic_test ,nutritional and metabolic diseases ,Lipid metabolism ,Atherosclerosis ,Lipids ,Molecular biology ,Plaque, Atherosclerotic ,Up-Regulation ,Disease Models, Animal ,Lipoprotein Lipase ,030104 developmental biology ,chemistry ,KLF2 ,lipids (amino acids, peptides, and proteins) ,Transcription Factor 7-Like 2 Protein ,030217 neurology & neurosurgery ,Signal Transduction - Abstract
Lipoprotein lipase (LPL) plays a central role in hydrolyzing triglyceride and its deficiency leads to atherosclerosis. Artesunate (ART), a derivative of artemisinin, has been demonstrated that ART reduces the formation of atherosclerotic plaques. However, it remains unclear whether ART-alleviated atherosclerotic lesion is involved in regulating lipid metabolism. ApoE-/- mice were fed a high-fat diet to form atherosclerotic plaques and then injected with artesunate or not. Oil Red O, HE and Masson staining were performed to assess atherosclerotic plaques. Both Western blot and qRT-PCR were applied to detect protein expression. The Luciferase reporter gene and Chromatin immunoprecipitation assays were used to assess the interaction between proteins. Immunofluorescence assay was performed to show the localization of target proteins. In vitro, our data shown that ART increased LPL expression and inhibition of NRF2 blocked the binding of TCF7L2 to LPL promoter region in VSMCs. Downregulated Klf2 could decrease the nuclear enrichment of NRF2, TCF7L2 and LPL expression. In vivo, ART decreased atherosclerotic plaque formation and increased VSMC counts and LPL expression within atherosclerotic plaques. We observed the reduced tendency of serum lipids, and increased in serum LPL activity in mice. In support of vitro data, the markedly increased KLF2, TCF7L2 and LPL expression have been detected in aorta. Our study suggests that ART may be a novel therapeutic drug for inhibition of atherosclerotic plaque formation. The molecular mechanism may involve in upregulation of LPL expression via the KLF2/NRF2/TCF7L2 pathway in VSMCs.
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- 2020
10. Effects of Different Nitrogen Fertilizers on Wheat Growth and Cadmium Uptake*
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Chang-Quan Wang, Yu Cheng, Shi-Hua Tu, Ming-Lan Liao, Yu-sheng Qin, La-Tie Jiaka, Hua Yu, Jing Zhao, and Wen-Qiang Feng
- Subjects
Cadmium ,Agronomy ,chemistry ,Genetics ,chemistry.chemical_element ,Pollution ,Agronomy and Crop Science ,Applied Microbiology and Biotechnology ,Nitrogen - Published
- 2010
11. Effect of nitrogen fertilizer type and application rate on cadmium uptake and grain yield of paddy rice
- Author
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Jing Zhao, Wen-Qiang Feng, Shi-Hua Tu, Chang-Quan Wang, Ming-Lan Liao, La-Tie Jiaka, Hua Yu, and Yu-sheng Qin
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Cadmium ,Nitrogen fertilizer ,Ecology ,Agronomy ,Chemistry ,Soil Science ,Grain yield ,chemistry.chemical_element ,Plant Science ,Agronomy and Crop Science ,Ecology, Evolution, Behavior and Systematics - Published
- 2010
12. Electron-beam irradiation on poly(propylene carbonate) in the presence of polyfunctional monomers
- Author
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Yu Sheng Qin, Fosong Wang, Jia Zhen Sun, Xianhong Wang, Xiao Jiang Zhao, and Qing Wei Ma
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Materials science ,Polymers and Plastics ,Condensed Matter Physics ,chemistry.chemical_compound ,Monomer ,chemistry ,Mechanics of Materials ,visual_art ,Ultimate tensile strength ,Propylene carbonate ,Polymer chemistry ,Materials Chemistry ,visual_art.visual_art_medium ,Thermal stability ,Propylene oxide ,Irradiation ,Polycarbonate ,Glass transition ,Nuclear chemistry - Abstract
Poly(propylene carbonate) (PPC) showed predominantly degradation under electron-beam irradiation, accompanied by deterioration of its mechanical performance due to sharp decrease of the molecular weight. Crosslinked PPC was prepared by addition of polyfunctional monomer (PFM) to enhance the mechanical performance of PPC. When 8 wt% of PFM like triallyl isocyanurate (TAIL) was added, crosslinked PPC with a gel fraction of 60.7% was prepared at 50 kGy irradiation dose, which showed a tensile strength at 20 degrees C of 45.5 MPa, whereas it was only 38.5 MPa for pure PPC. The onset degradation temperature (T-i) and glass transition temperature (T-g) of this crosslinked PPC was 246 degrees C and 45 degrees C, respectively, a significant increase related to pure PPC of 211 degrees C and 36 C. Therefore, thermal and mechanical performances of PPC could be improved via electron-beam irradiation in the presence of suitable PFM.
- Published
- 2007
13. [Protective effects of intermedin preconditioning on hypoxic injury in rat's cardiac myocytes]
- Author
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Qiu-xiang, Du, Yu-sheng, Qin, Jia, Liu, Jun-hong, Sun, and Ying-yuan, Wang
- Subjects
Rats, Sprague-Dawley ,Cell Survival ,Myocardium ,Myocardial Ischemia ,Animals ,Apoptosis ,Calcium ,Myocytes, Cardiac ,Hypoxia ,Cell Hypoxia ,Rats - Abstract
To observe the effects of intermedin preconditioning on hypoxic injury in rat's cardiac myocytes and to provide the hypothetical mechanism of sudden cardiac death in the field of forensic pathology.The H9c2 cultured rat cardiac myocytes were randomly divided into control group, hypoxia group and IMD group. The myocardial cell viability, cellular ultrastructure, intracellular calcium concentration and apoptosis rate were determined by MTT assay, transmission electron microscopy, laser scanning confocal microscope and flow cytometry, respectively.Compared with the control group, cell viability obviously decreased with inner ultrastructure injury in the hypoxia group (P0.05), while cell viability significantly increased in the IMD group by reducing the hypoxia injury of cardiac myocytes (P0.05). Compared with the control group, [Ca2+]i (fluorescence intensity) and apoptosis rate significantly increased in the hypoxia group, but decreased in the IMD group (P0.05).IMD increases the cell survival rate and decreases the cell apoptosis inhibited by intracellular calcium overload from hypoxia. This finding may reveal the mechanism of protective effects of myocardial hypoxia, and provide a scientific basis for the identification sudden cardiac death.
- Published
- 2014
14. [Distribution characteristics of soil cadmium in different textured paddy soil profiles and its relevance with cadmium uptake by crops]
- Author
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Yu-Sheng, Qin, Shao-Jun, Zhan, Hua, Yu, Shi-Hua, Tu, and Zheng-Yin, Wang
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Crops, Agricultural ,China ,Soil ,Spectrophotometry, Atomic ,Soil Pollutants ,Oryza ,Triticum ,Cadmium ,Environmental Monitoring - Abstract
Adopting atomic absorption spectrometry (novAA400), the present study investigated the distribution characteristics of soil cadmium (Cd) in different textured paddy soil profiles under rice-wheat rotation and its correlation with Cd uptake by rice and wheat in Chengdu Plain through repeatedly taking soil and plant samples at the fixed sites in the field. The results revealed that Cd in the paddy soil profiles was mainly concentrated at the plough layer (0-15 cm) that obviously featured 'Cd accumulates towards the rooting layer'. Soil total Cd and available Cd (1 mol x L(-1) MgCl2 extraction) in the profile declined with soil depths and its average values at 30-45 cm only accounted for 47.60% and 39.49% of those at 0-15 cm. The potential downward movement of Cd in the different textured soil profiles was observed as sandy loamheavy loamloam. There was no significant correlation between soil pH and available Cd(r = - 0.46) at 0-15 cm soil depth, while significantly negative correlations between soil pH and available Cd were observed at 15-30 cm (r = -0.78) and 30-45 cm (r = -0.86). The results further demonstrated that the Cd contents in either grain or straw of rice and wheat were not well correlated with soil total Cd at any soil depth (r = -0.092-0.383 for rice and r = 0.174-0.424 for wheat), but significantly correlated with soil available Cd at 0-15 cm and at 15-30 cm (r = 0.766*-0.953**) despite insignificant correlation at 30-45 cm (r = 0.526-0.584). It is strongly suggested that the soil available Cd can be used as a better criterion than the total soil Cd to rate Cd contaminated soils in relation to safety of agricultural products.
- Published
- 2013
15. Intrusion Detection System Based on Immune Algorithm and Support Vector Machine in Wireless Sensor Network
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Yu Gui Xiang, Yu Sheng Qin, Yu Sheng Chen, Xu Long Jiao, and Jing Xi Zhong
- Subjects
Anomaly-based intrusion detection system ,Computer science ,business.industry ,Network data ,Pattern recognition ,Feature selection ,Intrusion detection system ,Support vector machine ,Host-based intrusion detection system ,Network intrusion detection ,Artificial intelligence ,business ,Wireless sensor network ,Algorithm - Abstract
In order to improve the reality and whole performance of network intrusion detection system (IDS), after the characteristics of data used in IDS were analyzed, an approach, in which intruders are recognized, was presented in the paper, which was based on immune algorithm (IA) and support vector machine (SVM). In this method, immune algorithm is used to preprocess the network data, SVM is adopted to classify the optimization data, and recognize intruders. Experimental results showed that the method was feasible and efficient.
- Published
- 2011
16. Cadmium Uptake by Paddy Rice and Soil Available Cd under Water Flooding as Affected by Nitrogen Fertilizer
- Author
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Yu-sheng Qin, Zheng-yin Wang, La-tie Jiaka, and Shi-hua Tu
- Subjects
Cadmium ,food and beverages ,chemistry.chemical_element ,engineering.material ,Straw ,Nitrogen ,Soil contamination ,chemistry.chemical_compound ,chemistry ,Agronomy ,Soil pH ,engineering ,Urea ,Fertilizer ,Incubation - Abstract
In order to tackle the problem of Cd pollution in paddy soils and investigate soil available Cd as affected by nitrogen fertilizers, incubation and pot experiments were carried out to study effects of different nitrogen fertilizers and rates of urea on cadmium uptake by paddy rice and soil available Cd under water flooding condition. Results revealed that soil pH increased sharply after the soil was flooded, especially at the beginning of incubation, and gradually decreased with incubation time and finally tended to approach the neutral values. The patterns of soil pH change were just opposite to those of soil available Cd, a negative correlation observed between the two. Soil flooding made the soil available Cd drop by 58.2%-84.1%. Among 4 nitrogen fertilizers, the NH4Cl treatment significantly increased Cd content in rice more than the other three treatments including urea, (NH4)2SO4 and NH4NO3 and facilitated transfer of Cd from rice straw to grains; there was no significant difference in Cd contents in both straw and grains between the latter three nitrogen treatments. Optimal rate (N 0.2 g•kg-1) of urea could significantly lower the Cd concentration in rice grains, while either no N or high rate of urea treatment significantly enhanced the Cd concentration in grains. Results further revealed that on the Cd contaminated paddy soil, employing a Cd resistant rice cultivar in combination with optimized fertilizer and water management practices could lower the Cd content in rice grains far below the maximum permissible level of 0.2 mg•Cd kg-1 set by the state for the pollution-free rice production.
- Published
- 2010
17. [Effect of different N, P and K fertilizers on soil pH and available Cd under waterlogged conditions]
- Author
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Ka-La-Tie, Jia, Hua, Yu, Wen-Qiang, Feng, Yu-Sheng, Qin, Jing, Zhao, Ming-Lan, Liao, Chang-Quan, Wang, and Shi-Hua, Tu
- Subjects
Soil ,Nitrogen ,Potassium ,Water Movements ,Soil Pollutants ,Oryza ,Phosphorus ,Hydrogen-Ion Concentration ,Fertilizers ,Floods ,Cadmium ,Environmental Monitoring - Abstract
In order to tackle the problem of Cd pollution in paddy soils and investigate soil available Cd as affected by different fertilizers, incubation experiments were carried out to study the effects of different N, P and K fertilizers and pH by adding acid or base on soil available Cd under waterlogged conditions. Results revealed that soil pH increased sharply after the soil was flooded, especially at the beginning of incubation, and gradually decreased with incubation time and finally tended to approach the neutral values. The patterns of soil pH change were just opposite to those of soil available Cd, a negative correlation observed between the two. Soil flooding made the soil available Cd drop by 58.2%-84.1%. There were significant differences between different fertilizer types/varieties on soil available Cd, being most complex with N fertilizers and followed by K and P fertilizers. Among the fertilizers studied, ammonium chloride showed the unique ability in reducing soil pH and enhancing soil available Cd, and urea, single super phosphate and potassium chloride also promoted to a less extent amounts of Cd extracted from the soil. Ammonium sulfate, potassium sulfate and mono-ammonium phosphate significantly decreased soil available Cd compared to the CK treatment. Whether or not the soil was flooded, soil available Cd was highly negatively correlated with soil pH after adding acid or base (R = - 0.994 without incubation and R = - 0.919 after incubation for 60 d). The results further suggest that in the Cd polluted paddy soil, use of ammonium chloride should be avoided, S bearing fertilizers in combination with alkaline materials can be adopted, and the rice field should be flooded all the time during growing season, all the these practices can effectively lower soil available Cd.
- Published
- 2010
18. [Methodology improvement in background elimination in plant Cd measurement by graphite furnace atom absorption]
- Author
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Hua, Yu, Wen-qiang, Feng, Yu-sheng, Qin, Qing-rui, Chen, Xiang-zhong, Zeng, and Shi-hua, Tu
- Abstract
A problem of higher background value and lower measured Cd value exists when Cd is digested by conventional dry digestion method, measured by graphite furnace atomic absorption, and calculated with peak height numeration. This problem results in difficulty for evaluating samples with Cd contents in the neighborhood of critical values. In order to solve the problem, the present paper focused on background measurement with graphite furnace atomic absorption, modified the pre-preparation procedures of the traditional method, and screened the optimal concentration of the modifier. Results showed that addition of Mg (NO3)2 as a modifier into the samples before incineration was preferred. It could not only yield a clear solution but also reduce its background by ten times, considerably eliminating background interference. In addition, using 3% HNO3 in stead of 1 mol x L(-1) HCl as dilution for the incinerated sample could eliminate the background. The improved methods could acquire a zero concentration of measurement for the blank, re-correct the values measured by graphite furnace atomic absorption and obtain more reliable results.
- Published
- 2009
19. PROGRESS IN FUNCTIONAL CARBON DIOXIDE BASED ALIPHATIC POLYCARBONATES
- Author
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Yu-sheng, Qin, primary, Lin, Gu, additional, and Xian-hong, Wang, additional
- Published
- 2013
- Full Text
- View/download PDF
20. A Method of Choosing Important Features Used to Intrusion Detection System in Wireless Sensor Networks
- Author
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Wang, Shu, primary, Sha, Jia Xiang, additional, Yu, Gui Xiang, additional, Yu, Sheng Qin, additional, and Yu, Sheng Chen, additional
- Published
- 2012
- Full Text
- View/download PDF
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