43 results on '"Nian, Yao"'
Search Results
2. Exploring the Potential of Duck Egg White Jelly: Enhancing Texture, Reducing Phosphate, and Innovating Emulsified Meat Snacks
- Author
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Nian-Yao Zheng, Yen-Po Chen, Yu-Cheng Liu, Jia-Shian Shiu, Lian-Ben Chang, and Sheng-Yao Wang
- Subjects
duck egg white jelly ,emulsified meat snack ,phosphate ,texture ,Chemical technology ,TP1-1185 - Abstract
Duck egg white jelly, a protein-rich, alkali-induced gel, mirrors preserved duck egg white in appearance and properties, offering easier storage and utility, especially when excess egg white is available. This research focuses on incorporating duck egg white jelly into emulsified meat snacks to enhance texture while reducing the phosphate content. This study suggests that adding phosphate and duck egg white jelly increases raw meat paste pH, affecting its viscosity. With half the usual phosphate and either 3.0% or 6.0% jelly, the pH significantly increases compared to the control paste, containing 0.2% phosphate (p < 0.05). Viscosity remains unaffected in the group with 6.0% jelly and no phosphate versus the control (p > 0.05). The least favorable viscosity is observed in pastes without phosphate or jelly, suggesting that the jelly plays a similar role to phosphate. After boiling and shaping the pastes into emulsified meat snacks, their texture profiles and water-holding capacities were analyzed. Formulas with phosphate and jelly produced emulsified meat snacks with improved springiness, chewiness, reduced cooking loss, and decreased purge loss during storage. Color analysis showed no significant differences between the control and treatment groups (p > 0.05). Duck egg white jelly, when added, effectively reduces the phosphate content while enhancing texture and consumer acceptance of emulsified meat snacks. It serves as a versatile ingredient for low-phosphate, emulsified meat products, with potential for various meat combinations.
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- 2024
- Full Text
- View/download PDF
3. Insights into the pyrolytic coking process of RP-3 fuel from ReaxFF molecular dynamics
- Author
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Zhang, Houjun, Li, Wei, Nian, Yao, Liu, Menghui, Zhang, Jinli, and Han, You
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- 2024
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- View/download PDF
4. Promoting effect of oxygen vacancies in Co/CoAl2O4 catalyst steered with a straightforward method on hydrogenation of furfural to 2-methylfuran
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Li, Yongwang, Shen, Qi, Nian, Yao, Wang, Fumin, Zhang, Xubin, Zhang, Zhengliang, Bing, Changhao, Fan, Xiaolu, and Ahishakiye, Rosine
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- 2024
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5. Risk Factors and Predictive Models for Peripherally Inserted Central Catheter Unplanned Extubation in Patients With Cancer: Prospective, Machine Learning Study
- Author
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Jinghui Zhang, Guiyuan Ma, Sha Peng, Jianmei Hou, Ran Xu, Lingxia Luo, Jiaji Hu, Nian Yao, Jiaan Wang, and Xin Huang
- Subjects
Computer applications to medicine. Medical informatics ,R858-859.7 ,Public aspects of medicine ,RA1-1270 - Abstract
BackgroundCancer indeed represents a significant public health challenge, and unplanned extubation of peripherally inserted central catheter (PICC-UE) is a critical concern in patient safety. Identifying independent risk factors and implementing high-quality assessment tools for early detection in high-risk populations can play a crucial role in reducing the incidence of PICC-UE among patients with cancer. Precise prevention and treatment strategies are essential to improve patient outcomes and safety in clinical settings. ObjectiveThis study aims to identify the independent risk factors associated with PICC-UE in patients with cancer and to construct a predictive model tailored to this group, offering a theoretical framework for anticipating and preventing PICC-UE in these patients. MethodsProspective data were gathered from January to December 2022, encompassing patients with cancer with PICC at Xiangya Hospital, Central South University. Each patient underwent continuous monitoring until the catheter’s removal. The patients were categorized into 2 groups: the UE group (n=3107) and the non-UE group (n=284). Independent risk factors were identified through univariate analysis, the least absolute shrinkage and selection operator (LASSO) algorithm, and multivariate analysis. Subsequently, the 3391 patients were classified into a train set and a test set in a 7:3 ratio. Utilizing the identified predictors, 3 predictive models were constructed using the logistic regression, support vector machine, and random forest algorithms. The ultimate model was selected based on the receiver operating characteristic (ROC) curve and TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) synthesis analysis. To further validate the model, we gathered prospective data from 600 patients with cancer at the Affiliated Hospital of Qinghai University and Hainan Provincial People’s Hospital from June to December 2022. We assessed the model’s performance using the area under the curve of the ROC to evaluate differentiation, the calibration curve for calibration capability, and decision curve analysis (DCA) to gauge the model’s clinical applicability. ResultsIndependent risk factors for PICC-UE in patients with cancer were identified, including impaired physical mobility (odds ratio [OR] 2.775, 95% CI 1.951-3.946), diabetes (OR 1.754, 95% CI 1.134-2.712), surgical history (OR 1.734, 95% CI 1.313-2.290), elevated D-dimer concentration (OR 2.376, 95% CI 1.778-3.176), targeted therapy (OR 1.441, 95% CI 1.104-1.881), surgical treatment (OR 1.543, 95% CI 1.152-2.066), and more than 1 catheter puncture (OR 1.715, 95% CI 1.121-2.624). Protective factors were normal BMI (OR 0.449, 95% CI 0.342-0.590), polyurethane catheter material (OR 0.305, 95% CI 0.228-0.408), and valved catheter (OR 0.639, 95% CI 0.480-0.851). The TOPSIS synthesis analysis results showed that in the train set, the composite index (Ci) values were 0.00 for the logistic model, 0.82 for the support vector machine model, and 0.85 for the random forest model. In the test set, the Ci values were 0.00 for the logistic model, 1.00 for the support vector machine model, and 0.81 for the random forest model. The optimal model, constructed based on the support vector machine, was obtained and validated externally. The ROC curve, calibration curve, and DCA curve demonstrated that the model exhibited excellent accuracy, stability, generalizability, and clinical applicability. ConclusionsIn summary, this study identified 10 independent risk factors for PICC-UE in patients with cancer. The predictive model developed using the support vector machine algorithm demonstrated excellent clinical applicability and was validated externally, providing valuable support for the early prediction of PICC-UE in patients with cancer.
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- 2023
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6. Hospice preference of the family decision-makers for cancer patients in China: an exploratory study
- Author
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Nian Yao, Hao Chen, and Xiaobin Lai
- Subjects
Hospice enrollment ,Cancer ,Choice behavior ,Decision-making ,Physician–patient communication ,Chinese population ,Special situations and conditions ,RC952-1245 - Abstract
Abstract Background The reasons for hospice underuse in China need exploration from the perspective of patients with cancer and their families. Furthermore, existing literature about hospice decision-making among Chinese families with cancer patients is limited. This study aimed to investigate the awareness of hospice care among families with cancer patients, their preference for healthcare at the end-of-life stage of care, and the predictors of hospice preference. Methods This was an exploratory study conducted between July 2021 and January 2022. Overall, 300 decision-makers of cancer patients were recruited from the oncology ward of seven hospitals in Shanghai, China. Of these, 285 valid responses were included in the data analysis. A self-developed questionnaire about their preference for healthcare when the patient was at the end-of-life stage was completed. Descriptive analysis, t-test, chi-square test, and multivariable logistic regression were conducted to analyze the data. Results Only 46.0% of the participants have heard of hospice care. Most participants (78.2%) reported no introduction to hospice care from their doctors. More than half of the participants (58.2%) did not have a preference for healthcare at the end-of-life stage. Seventy-eight (65.5%) of the 119 participants who had a preference chose hospice care, and the other 41 participants (34.5%) refused hospice care. Having heard of hospice care had a significant impact on preferring healthcare at the end-of-life stage (adjusted OR = 14.346, 95%CI 7.219–28.509, p
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- 2022
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7. Exploring the Potential of Duck Egg White Jelly: Enhancing Texture, Reducing Phosphate, and Innovating Emulsified Meat Snacks.
- Author
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Zheng, Nian-Yao, Chen, Yen-Po, Liu, Yu-Cheng, Shiu, Jia-Shian, Chang, Lian-Ben, and Wang, Sheng-Yao
- Abstract
Duck egg white jelly, a protein-rich, alkali-induced gel, mirrors preserved duck egg white in appearance and properties, offering easier storage and utility, especially when excess egg white is available. This research focuses on incorporating duck egg white jelly into emulsified meat snacks to enhance texture while reducing the phosphate content. This study suggests that adding phosphate and duck egg white jelly increases raw meat paste pH, affecting its viscosity. With half the usual phosphate and either 3.0% or 6.0% jelly, the pH significantly increases compared to the control paste, containing 0.2% phosphate (p < 0.05). Viscosity remains unaffected in the group with 6.0% jelly and no phosphate versus the control (p > 0.05). The least favorable viscosity is observed in pastes without phosphate or jelly, suggesting that the jelly plays a similar role to phosphate. After boiling and shaping the pastes into emulsified meat snacks, their texture profiles and water-holding capacities were analyzed. Formulas with phosphate and jelly produced emulsified meat snacks with improved springiness, chewiness, reduced cooking loss, and decreased purge loss during storage. Color analysis showed no significant differences between the control and treatment groups (p > 0.05). Duck egg white jelly, when added, effectively reduces the phosphate content while enhancing texture and consumer acceptance of emulsified meat snacks. It serves as a versatile ingredient for low-phosphate, emulsified meat products, with potential for various meat combinations. [ABSTRACT FROM AUTHOR]
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- 2024
- Full Text
- View/download PDF
8. Characterization and fine mapping of RTMS10, a semi-dominant reverse thermo-sensitive genic male sterile locus in rice
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Jin-long, NI, De-zheng, WANG, Da-hu, NI, Feng-shun, SONG, Jian-bo, YANG, and Da-nian, YAO
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- 2022
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9. Trends and descriptors for tuning CO2 electroreduction to synthesis gas over Ag and Au supported on transition metal carbides and nitrides
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Nian, Yao, Wang, Yan, Biswas, Akash N., Chen, Xiaobo, Han, You, and Chen, Jingguang G.
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- 2021
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10. A preliminary study comparing the sedative, cardiorespiratory, and histaminic-releasing effects of intramuscular and intravenous administration of pethidine (meperidine) with midazolam in healthy cats
- Author
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Yang, Nian-Yao, Ko, Jeff C., Wang, Hsien-Chi, and Liu, Pin-Chen
- Published
- 2021
- Full Text
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11. Development of a heatable duck egg white translucent jelly: an evaluation of its physicochemical properties and thermal stability
- Author
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Zheng, Nian-Yao, Chen, Yi-Chen, Chen, Yen-Po, Shiu, Jia-Shian, and Wang, Sheng-Yao
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- 2021
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12. Ruthenium catalyst coordinated with [[formula omitted]][[formula omitted]] ionic liquid for acetylene hydrochlorination
- Author
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Han, You, Zhang, Hongyu, Li, Yu, Nian, Yao, Li, Wei, and Zhang, Jinli
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- 2020
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13. Catalytic reactivity of Co3O4 with different facets in the hydrogen abstraction of phenol by persulfate
- Author
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Wang, Cong, Jia, Shaoyi, Zhang, Yongchao, Nian, Yao, Wang, Yan, Han, You, Liu, Yong, Ren, Haitao, Wu, Songhai, Yao, Kexin, and Han, Xu
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- 2020
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14. A preliminary study comparing the sedative, cardiorespiratory, and histaminic-releasing effects of intramuscular and intravenous administration of pethidine (meperidine) with midazolam in healthy cats
- Author
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Nian-Yao Yang, Jeff C. Ko, Hsien-Chi Wang, and Pin-Chen Liu
- Subjects
Pethidine ,Midazolam ,Intravenous ,Sedation ,Histamine ,Cat ,Veterinary medicine ,SF600-1100 - Abstract
Pethidine is a synthetic opioid that is widely used in cats. However, the sedative, cardiorespiratory, and histaminic effects following administration of pethidine with midazolam in cats remain unclear. The objectives of this study were to evaluate and compare changes before and after intravenous (IV) and intramuscular (IM) administration of pethidine with midazolam in healthy cats. In this prospective randomized blind study, 12 cats were assigned equally to either the IV or IM treatment group. The IV group received pethidine 3 mg/kg and midazolam 0.1 mg/kg. The IM group received pethidine 6 mg/kg and midazolam 0.2 mg/kg. The sedative effects, heart rate, respiratory rate, non-invasive arterial blood pressures, and behavioral signs were recorded before and at 2, 5, 15, 30, 45, and 60 min after the injection. Blood samples were taken for an ELISA histamine assay at baseline and at 5 and 15 min after treatment. Cats that received IV treatment were rapidly induced a moderate degree of sedation but those received IM treatment were only mildly sedated. There was no significant difference in the cardiorespiratory values within and between the treatments over time. Plasma histamine concentrations increased by 3 and 5 times at 5 and 15 min after IV treatment, respectively, compared to baseline values. IM injections induced minimal changes in the plasma histamine concentration. In summary, intravenous pethidine with midazolam induced potentially superior sedative effects without serious side effects in clinically healthy cats. However, further studies with larger sample sizes are required to validate this finding.
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- 2021
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15. Development of a heatable duck egg white translucent jelly: an evaluation of its physicochemical properties and thermal stability
- Author
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Nian-Yao Zheng, Yi-Chen Chen, Yen-Po Chen, Jia-Shian Shiu, and Sheng-Yao Wang
- Subjects
heatable translucent jelly ,duck egg white ,ginger ,turmeric ,Animal culture ,SF1-1100 - Abstract
ABSTRACT: Though nutritional, the remaining separated duck egg white in duck egg processing plants presents challenges for its transportation and use, as it spoils easily and has a strong odor. Uses for the excess egg white are of paramount concern for agricultural resource reuse. The purpose of this study was to increase its value and use efficiency. Duck egg white was mixed with sodium hydroxide to produce translucent alkali-induced egg white jelly similar to that in preserved egg whites. To develop a heatable translucent egg white jelly, their physiochemical properties and thermal stabilities were investigated. A gel prepared with 150 mM sodium hydroxide at 25°C had optimal bloom strength and the densest microstructure. Storing the jelly at 5°C helped maintain its disulfide bonds and delayed liquefaction. Although heating decreased its bloom strength and total disulfide bond content as temperature increased (P < 0.05), scanning electron microscopy of the heated jelly revealed that the protein network structure was denser than that of unheated jelly. Heating caused parts of the structure to shrink and even dehydrate, leading to a wrinkled surface. However, no signs of liquefaction or collapse were observed, and the free alkali released during heating was lower than that from the white of existing preserved eggs. These results confirmed the thermal stability of the jelly and its potential to be served hot or used in food processing. Furthermore, in addition to disguising the odor and special flavor attributable to the alkaline treatment, adding ginger juice or turmeric to the preparation yielded higher bloom strength, resulted in lower free alkalinity, and delayed liquefaction, thus improving the jelly's thermal stability. Like preserved eggs on the market that can be served in hot congee, the proposed egg white jelly is rich in proteins and suitable for hot or instant serving. These findings may help address the problem of excessive remaining duck egg white created during food processing by diversifying duck egg processing and boosting its value.
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- 2021
- Full Text
- View/download PDF
16. Hospice preference among families with cancer patients in China: An exploratory study
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Nian YAO, Hao CHEN, and Xiao Bin LAI
- Abstract
Background: The reasons for hospice underuse in China needs exploration from the perspective of patients with cancer and their families. Furthermore, existing literature about hospice decision-making among Chinese families with cancer patients is limited. This study aimed to investigate the awareness of hospice care among families with cancer patients, their preference of healthcare at the end-of-life stage of care, and the predictors of hospice preference.Methods: This was an exploratory study conducted between July 2021 and January 2022. Overall, 300 decision-makers of cancer patients were recruited from the oncology ward of seven hospitals in Shanghai, China. Of these, 285 valid responses were included in the data analysis. A self-developed questionnaire about their preference of healthcare when the patient was at the end-of-life stage was completed. Descriptive analysis, t-test, chi-square test, and logistic regression were conducted to analyze the data.Results: Only 29.7% of the participants had heard of hospice care. Most participants (78.2%) reported no introduction of hospice care from their doctors. More than half of the participants (58.2%) did not have a preference of healthcare at the end-of-life stage. Seventy-eight (65.5%) of the 119 participants who had a preference chose hospice care, and the other 41 participants (34.5%) refused hospice care. Having heard of hospice care had a significant impact on having a preference for healthcare at the end-of-life stage (OR=14.346, 95%CI 7.219-28.509, pOR=0.180, 95%CI 0.052-0.617, p=0.006). Another family member being cared for at home had a significant impact on the participants’ hospice preference (OR=2.739, 95%CI 1.159-6.470, p=0.022).Conclusion: The end-of-life communication between healthcare providers and the families of cancer patients is insufficient. More efforts should be made in increasing the awareness of hospice care among patients with cancer and their families. Further study is needed to explore the reasons for a lack of discussion on hospice options between healthcare providers and the families. Additionally, the impact of at-home care burden on the hospice choice of families with cancer patients requires further study.
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- 2022
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17. Revealing synergetic structural activation of a CuAu surface during water–gas shift reaction
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Dong, Zejian, primary, Nian, Yao, additional, Liu, Hongpeng, additional, Chen, Jiacheng, additional, Wang, Yan, additional, Wang, Shuangbao, additional, Xu, Jing, additional, Han, You, additional, and Luo, Langli, additional
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- 2022
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18. Development of a heatable duck egg white translucent jelly: an evaluation of its physicochemical properties and thermal stability
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Yen Po Chen, Jia Shian Shiu, Yi-Chen Chen, Sheng-Yao Wang, and Nian Yao Zheng
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Food Handling ,ginger ,Alkalinity ,PROCESSING AND PRODUCT ,SF1-1100 ,chemistry.chemical_compound ,duck egg white ,Egg White ,Animals ,Thermal stability ,Food science ,Flavor ,Ovum ,heatable translucent jelly ,turmeric ,Liquefaction ,General Medicine ,Animal culture ,Ducks ,chemistry ,Odor ,Sodium hydroxide ,Animal Science and Zoology ,Protein network ,Chickens ,Egg white - Abstract
Though nutritional, the remaining separated duck egg white in duck egg processing plants presents challenges for its transportation and use, as it spoils easily and has a strong odor. Uses for the excess egg white are of paramount concern for agricultural resource reuse. The purpose of this study was to increase its value and use efficiency. Duck egg white was mixed with sodium hydroxide to produce translucent alkali-induced egg white jelly similar to that in preserved egg whites. To develop a heatable translucent egg white jelly, their physiochemical properties and thermal stabilities were investigated. A gel prepared with 150 mM sodium hydroxide at 25°C had optimal bloom strength and the densest microstructure. Storing the jelly at 5°C helped maintain its disulfide bonds and delayed liquefaction. Although heating decreased its bloom strength and total disulfide bond content as temperature increased (P < 0.05), scanning electron microscopy of the heated jelly revealed that the protein network structure was denser than that of unheated jelly. Heating caused parts of the structure to shrink and even dehydrate, leading to a wrinkled surface. However, no signs of liquefaction or collapse were observed, and the free alkali released during heating was lower than that from the white of existing preserved eggs. These results confirmed the thermal stability of the jelly and its potential to be served hot or used in food processing. Furthermore, in addition to disguising the odor and special flavor attributable to the alkaline treatment, adding ginger juice or turmeric to the preparation yielded higher bloom strength, resulted in lower free alkalinity, and delayed liquefaction, thus improving the jelly's thermal stability. Like preserved eggs on the market that can be served in hot congee, the proposed egg white jelly is rich in proteins and suitable for hot or instant serving. These findings may help address the problem of excessive remaining duck egg white created during food processing by diversifying duck egg processing and boosting its value.
- Published
- 2021
19. Limit theorems for non-Markovian marked dynamic contagion processes
- Author
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Mingqing Xiao and Nian Yao
- Subjects
Current (mathematics) ,Applied Mathematics ,010102 general mathematics ,Markov process ,Type (model theory) ,01 natural sciences ,Point process ,010104 statistics & probability ,symbols.namesake ,Law of large numbers ,symbols ,Statistical physics ,Limit (mathematics) ,0101 mathematics ,Rate function ,Analysis ,Mathematics ,Central limit theorem - Abstract
In this paper, we study a general dynamic contagion process that includes several standard point processes as special cases. We have developed (i) the corresponding large deviation principle; (ii) the corresponding law of large numbers; (iii) the corresponding central limit theorem, all of which are critical in describing the essential of this type of processes, and are not available in current literature. The proposed model provides a broader framework in the study of contagion processes in various applications. In particular, we obtain the finite-horizon and infinite-horizon ruin probability asymptotics for the risk model with marked dynamic contagion claim arrivals as an application.
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- 2018
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20. Self-assembled PMo12 3-DODA+ composite superlattice thin films with photochromic properties
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Rui Zhang, Tie, Feng, Wei, Lu, Ran, Yan Bao, Chun, Tong Zhang, Xin, Jin Li, Tie, Ying Zhao, Ying, and Nian Yao, Jian
- Published
- 2002
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21. A preliminary study comparing the sedative, cardiorespiratory, and histaminic-releasing effects of intramuscular and intravenous administration of pethidine (meperidine) with midazolam in healthy cats
- Author
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Hsien-Chi Wang, Pin-Chen Liu, Jeff C. Ko, and Nian-Yao Yang
- Subjects
genetic structures ,Respiratory rate ,medicine.drug_class ,Veterinary medicine ,Midazolam ,Sedation ,Article ,SF600-1100 ,mental disorders ,Heart rate ,Medicine ,heterocyclic compounds ,CATS ,General Veterinary ,business.industry ,Cat ,Pethidine ,surgical procedures, operative ,Anesthesia ,Sedative ,Arterial blood ,Animal Science and Zoology ,medicine.symptom ,Intravenous ,business ,psychological phenomena and processes ,Histamine ,medicine.drug - Abstract
Highlights • First reporting of the sedative quality of pethidine in combination with midazolam in healthy cat. • Intravenous injection of pethidine-midazolam was associated with transient elevation of plasma histamine concentration but self-limiting in healthy cat. • The pethidine-midazolam can provide short duration of sedation without obvious side effects in healthy cat., Pethidine is a synthetic opioid that is widely used in cats. However, the sedative, cardiorespiratory, and histaminic effects following administration of pethidine with midazolam in cats remain unclear. The objectives of this study were to evaluate and compare changes before and after intravenous (IV) and intramuscular (IM) administration of pethidine with midazolam in healthy cats. In this prospective randomized blind study, 12 cats were assigned equally to either the IV or IM treatment group. The IV group received pethidine 3 mg/kg and midazolam 0.1 mg/kg. The IM group received pethidine 6 mg/kg and midazolam 0.2 mg/kg. The sedative effects, heart rate, respiratory rate, non-invasive arterial blood pressures, and behavioral signs were recorded before and at 2, 5, 15, 30, 45, and 60 min after the injection. Blood samples were taken for an ELISA histamine assay at baseline and at 5 and 15 min after treatment. Cats that received IV treatment were rapidly induced a moderate degree of sedation but those received IM treatment were only mildly sedated. There was no significant difference in the cardiorespiratory values within and between the treatments over time. Plasma histamine concentrations increased by 3 and 5 times at 5 and 15 min after IV treatment, respectively, compared to baseline values. IM injections induced minimal changes in the plasma histamine concentration. In summary, intravenous pethidine with midazolam induced potentially superior sedative effects without serious side effects in clinically healthy cats. However, further studies with larger sample sizes are required to validate this finding.
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- 2021
- Full Text
- View/download PDF
22. Ruthenium catalyst coordinated with [N4444+][PF6-] ionic liquid for acetylene hydrochlorination
- Author
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Han, You, primary, Zhang, Hongyu, additional, Li, Yu, additional, Nian, Yao, additional, Li, Wei, additional, and Zhang, Jinli, additional
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- 2020
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23. Thermochromic Organoaminomodified Silica Composite Films Containing Phosphomolybdic Acid
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Rui Zhang, Tie, Feng, Wei, Lu, Ran, Yan Bao, Chun, Jin Li, Tie, Ying Zhao, Ying, and Nian Yao, Jian
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- 2002
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24. Interaction Between Photoreceptors and BR Signaling in Arabidopsis
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Da Nian Yao, Yuan Hu Xuan, Zhong Xin Zhu, Yu Ting Zhu, and Xiaofeng Zhu
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Arabidopsis ,Plant Science ,Biology ,biology.organism_classification ,Cell biology - Abstract
Extensive studies have been performed to elucidate the role of brassinosteroids (BRs), an important class of phy-tohormone in plant growth, development, and photomorphogenesis. Different wavelengths of light recognized by photoreceptors play a crucial role in plant development. The role of different photoreceptors in BR signaling has not been analyzed. Here we used photoreceptor single mutants, double mutants and even a quadruple mutant to analyze BR-dependent hypocotyl growth and gene regulation. All the photoreceptor mutants differed from the controls in their response to BR, and hypocotyl elongation as well as BR marker gene regulation were inhibited by application of propiconazole (PCZ), a BR biosynthesis inhibitor. In addition, altered Phytochrome and Cryptochrome expression in brassinosteroid insensitive 1 mutant bri1-5 and brassinazole-resistant 1 dominant mutant bzr1-D indicated that BR negatively regulates photoreceptors in transcriptional levels. This is the first study to investigate the connections between BR and photoreceptors in Arabidopsis.
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- 2015
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25. Sourcing under cost information asymmetry when facing time-sensitive customers
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Nian Yao, He Xu, and Shilu Tong
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Economics and Econometrics ,Supply chain ,ComputerApplications_COMPUTERSINOTHERSYSTEMS ,Management Science and Operations Research ,General Business, Management and Accounting ,Industrial and Manufacturing Engineering ,Strategic sourcing ,Information asymmetry ,Supplier relationship management ,Operations management ,Business ,Game theory ,Lead time ,Time sensitive ,Industrial organization - Abstract
We study a supply chain with a manufacturer and two different suppliers. One supplier is a big company abroad, who is prime and offers high quality modules with long lead time. The other supplier is a small local company, taken as the urgent supplier by the manufacturer, who can produce modules in inferior quality but with flexible delivery time. Excess customers beyond the orders from the prime supplier, who are sensitive to the delivery time, may be satisfied by modules from the urgent supplier. As the urgent supplier owns private cost information (either low or high cost type) and the prime one is the wholesale price setter, the manufacturer should carefully design his sourcing strategy. In this paper, we show that the manufacturer may deny the urgent supplier, allow only the low cost type or permit both cost types of the urgent supplier, which follows a threshold type policy. When both cost types participate, whether the manufacturer differentiates the urgent supplier is also threshold type controlled. With fully characterizing the contracting issue with the urgent supplier, we derive the optimal wholesale price of the prime supplier and related order quantity from him. We further analyze how the delivery time guarantee elasticity affects the performance of each party in the supply chain through either analytical or numerical studies.
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- 2013
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26. Moderate deviations for a stochastic wave equation in dimension three
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Ruinan Li, Ran Wang, Lingyan Cheng, and Nian Yao
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Partial differential equation ,Weak convergence ,Applied Mathematics ,Probability (math.PR) ,010102 general mathematics ,Mathematical analysis ,60H15, 60F05, 60F10 ,Space (mathematics) ,Wave equation ,01 natural sciences ,010104 statistics & probability ,symbols.namesake ,Dimension (vector space) ,Gaussian noise ,FOS: Mathematics ,symbols ,Moderate deviations ,0101 mathematics ,Mathematics - Probability ,Central limit theorem ,Mathematics - Abstract
In this paper, we proved a central limit theorem and established a moderate deviation principle for a perturbed stochastic wave equation defined on $[0,T]\times \rr^3$. This equation is driven by a Gaussian noise, white in time and correlated in space. The weak convergence approach plays an important role., 20 pages. arXiv admin note: text overlap with arXiv:1509.01757
- Published
- 2016
27. The detection of QTLs controlling bacterial wilt resistance in tobacco (N. tabacum L.)
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Da-nian Yao, Xueyong Sun, Li-na Zhang, Zhi-yong Wang, Da-zhou Wang, Chao-long Zu, Xin-sheng Wang, Yi-liang Qian, Zheng-liang Gao, and Hong-jun Zhang
- Subjects
Linkage (software) ,Genetics ,Ralstonia solanacearum ,biology ,Bacterial wilt ,food and beverages ,Plant Science ,Horticulture ,Quantitative trait locus ,biology.organism_classification ,Genetic linkage ,Botany ,Cultivar ,Plant breeding ,Agronomy and Crop Science ,Gene - Abstract
The bacterial tobacco wilt caused by Ralstonia solanacearum is one of the most destructive soil-borne diseases worldwide. One strategy to improve the resistance to bacterial wilt is to make use of plant varieties expressing wilt resistance genes. To characterize the genetics of wilt resistance and to identify relevant molecular markers for use in plant breeding, quantitative trait loci (QTLs) affecting tobacco bacterial wilt resistance were mapped in the F2:3 and F2:4 progeny produced from two crosses between the wilt-resistant breeding lines Enshu and Yanyan97 and the susceptible cultivar TI448A. A linkage map containing 118 loci in 24 linkage groups was constructed for 236 lines from the Enshu×TI448A cross, and a linkage map containing 96 loci in 24 linkage groups was constructed for 264 lines from the Yanyan97×TI448A cross. The wilt resistance of the progeny was examined in field trials conducted in Xuancheng, China, in 2010, 2011, and 2012. The disease severity was assessed on stems using separate rating scales. Mapmaker/EXP 3.0 and Mapmaker/QTL 1.1 were used to identify the qBWR-3a, qBWR-3b, qBWR-5a and qBWR-5b QTLs in linkage group 3 and 5; these four loci were strongly associated with resistance and explain 9.00, 19.70, 17.30, and 17.40 % of the variance in resistance, respectively. The close linkage of the markers PT20275 and PT30229 was detected in both the TI448A×Enshu and TI448A×Yanyan97 crosses, and this linkage group could be used to select individual resistant plants. These findings suggest that one strategy to combat bacterial wilt could be to exploit the resistance genes of the Enshu and Yanyan97 strains.
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- 2012
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28. Simple synthesis and characterization of mesoporous (N, S)-codoped TiO2 with enhanced visible-light photocatalytic activity
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Li Jian, Nian Yao, Jian Pu, Congcong Wu, Lichao Jia, Song Han, and Bo Chi
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Anatase ,Materials science ,Process Chemistry and Technology ,Nanotechnology ,Visible light photocatalytic ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,chemistry.chemical_compound ,Absorption edge ,X-ray photoelectron spectroscopy ,Thiourea ,chemistry ,Materials Chemistry ,Ceramics and Composites ,Photocatalysis ,Irradiation ,Mesoporous material ,Nuclear chemistry - Abstract
Mesoporous (N, S)-codoped TiO2 was simply prepared by a solvothermal method with thiourea as N and S source. The as-prepared products were characterized by XRD, SEM, XPS, BET and UV–vis. The results confirm that N and S have been incorporated into the lattice of anatase TiO2, which brings an obvious red-shift of the absorption edge into visible-light region. Moreover, the codoped products exhibit high photocatalytic activity under the visible-light irradiation.
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- 2012
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29. Theoretical study on the electronic and optical properties of (N, Fe)-codoped anatase TiO2 photocatalyst
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Bo Chi, Zongbao Li, Yuanyuan Li, Lichao Jia, Nian Yao, Li Jian, Congcong Wu, Jian Pu, and Song Han
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Anatase ,Materials science ,Band gap ,Mechanical Engineering ,Doping ,Metals and Alloys ,Physics::Optics ,Tio2 photocatalyst ,Photochemistry ,Condensed Matter::Materials Science ,Mechanics of Materials ,Condensed Matter::Superconductivity ,Physics::Atomic and Molecular Clusters ,Materials Chemistry ,Photocatalysis ,First principle ,Condensed Matter::Strongly Correlated Electrons ,Density functional theory ,Irradiation - Abstract
Electronic and optical properties of pure, N-doped, Fe-doped and (N, Fe)-codoped anatase TiO2 were evaluated, respectively, by using the density functional theory. The results indicate that the elemental doping narrows the band gap of TiO2 and realize its visible-light response activity; and incorporation of Fe into N-doped TiO2 further increases the photocatalytic activity under visible-light irradiation compared with that of the N-doped TiO2.
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- 2011
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30. Characterization of CIMMYT bread wheats for high- and low-molecular weight glutenin subunits and other quality-related genes with SDS-PAGE, RP-HPLC and molecular markers
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Ravi P. Singh, Zhonghu He, Dan Liang, Roberto J. Peña, Da-nian Yao, Jianwei Tang, Xiaoyong Shen, Xianchun Xia, and Xinyao He
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Gel electrophoresis ,Locus (genetics) ,Plant Science ,Horticulture ,Biology ,Molecular biology ,chemistry.chemical_compound ,Glutenin ,chemistry ,Genetic marker ,Molecular marker ,Genetics ,biology.protein ,Allele ,Common wheat ,Agronomy and Crop Science ,Polyacrylamide gel electrophoresis - Abstract
Two hundred and seventy-three CIMMYT bread wheat cultivars and advanced lines grown under irrigated conditions in Mexico during the 2005-06 Yaqui crop cycle were characterized for quality-related genetic traits using gene-specific markers for some high- and low-molecular-weight glutenin subunit (HMW-GS and LMW-GS) genes, polyphenol oxidase (PPO), phytoene synthase (PSY), and waxy genes. Of them, 142 were analyzed for quality parameters including SDS sedimentation volume (SDS-SV), dough mixing time, and Alveograph parameters, and for HMW-GS and LMW-GS compositions using sodium-dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE), and reversed-phase high-performance liquid chromatography (RP-HPLC). For the Ppo-A1 locus tested with the marker PPO18, the frequencies of alleles Ppo-A1a and Ppo-A1b were 79.1 and 20.2%, respectively, and no PCR fragment was amplified in 2 lines (0.73%), whereas 227 lines (83.2%) contained the allele Ppo-D1a and 46 lines (16.8%) had Ppo-D1b detected by markers PPO16 and PPO29. For the marker YP7A, 142 lines (52.0%) were assumed to have the allele Psy-A1a and 131 lines (48.0%) contained the allele Psy-A1b. In the case of the marker YP7B for the gene Psy-B1, the alleles Psy-B1a and Psy-B1b were detected in 155 (56.8%) and 43 (15.8%) lines, respectively, and 75 (27.4%) lines possessed the allele Psy-B1d detected by the marker YP7B-3. All 273 lines contained the alleles Wx-A1a and Wx-D1a as determined by markers MAG264 and MAG269, respectively. Using the marker Wx-B1, 204 lines (74.7%) were presumed to have the Wx-B1a allele and 69 (25.3%) possessed Wx-B1b. The over-expressing allele of Bx7 OE and subunit By8*, not clearly seen with SDS-PAGE, were detected by RP-HPLC. The numbers of lines with subunits Ax2*, By8, By9, Bx17, Bx20, Dx5, and Glu-B3j were 90, 16, 57, 5, 46, 118, and 33, respectively, in the 142 lines analyzed with molecular markers, and were consistent with the results obtained by SDS-PAGE, except for one line with the 1A.1R translocation. Subunits Ax1 and Ax2* at the Glu-A1 locus showed significantly better effects on all quality parameters than subunit Null. Subunits 5 + 10 gave significantly better effects for all parameters. Subunit Glu-A3b showed more positive effects than its alternative alleles on SDS-SV and SDS-sedimentation volume/protein content index (SPI). The allele Glu-B3g showed the best effect on SDS-SV and Alveograph W, whereas Glu-B3j, associated with the 1B.1R translocation, exhibited a strongly negative effect on all quality parameters.
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- 2009
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31. Transportation-information inequalities for Markov processes
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Christian Léonard, Arnaud Guillin, Liming Wu, and Nian Yao
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Statistics and Probability ,Discrete mathematics ,Continuous function (set theory) ,Ergodicity ,Mathematical analysis ,Poincaré inequality ,Measure (mathematics) ,Sobolev inequality ,symbols.namesake ,symbols ,Ergodic theory ,Statistics, Probability and Uncertainty ,Concentration inequality ,Analysis ,Mathematics ,Probability measure - Abstract
In this paper, one investigates the transportation-information T c I inequalities: α(T c (ν, μ)) ≤ I (ν|μ) for all probability measures ν on a metric space $${(\mathcal{X}, d)}$$ , where μ is a given probability measure, T c (ν, μ) is the transportation cost from ν to μ with respect to the cost function c(x, y) on $${\mathcal{X}^2}$$ , I(ν|μ) is the Fisher–Donsker–Varadhan information of ν with respect to μ and α : [0, ∞) → [0, ∞] is a left continuous increasing function. Using large deviation techniques, it is shown that T c I is equivalent to some concentration inequality for the occupation measure of a μ-reversible ergodic Markov process related to I(·|μ). The tensorization property of T c I and comparisons of T c I with Poincare and log-Sobolev inequalities are investigated. Several easy-to-check sufficient conditions are provided for special important cases of T c I and several examples are worked out.
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- 2008
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32. Moderate deviations for a fractional stochastic heat equation with spatially correlated noise
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Nian Yao, Shuguang Zhang, Ran Wang, and Yumeng Li
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Weak convergence ,Operator (physics) ,010102 general mathematics ,Mathematical analysis ,Probability (math.PR) ,Space (mathematics) ,Differential operator ,01 natural sciences ,Noise (electronics) ,Fractional calculus ,010104 statistics & probability ,symbols.namesake ,Gaussian noise ,Modeling and Simulation ,symbols ,FOS: Mathematics ,60H15 ,Heat equation ,0101 mathematics ,Mathematics - Probability ,Mathematics - Abstract
In this paper, we study the Moderate Deviation Principle for a perturbed stochastic heat equation in the whole space $\rr^d, d\ge1$. This equation is driven by a Gaussian noise, white in time and correlated in space, and the differential operator is a fractional derivative operator. The weak convergence method plays an important role., Comment: arXiv admin note: text overlap with arXiv:1401.2798, arXiv:1505.04671, arXiv:math/0610769 by other authors
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- 2015
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33. Overexpression of a SNARE protein AtBS14b alters BR response in Arabidopsis
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Da Nian Yao, Zhong Xin Zhu, Yuan Hu Xuan, and Hong Bo Ye
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Vesicle-associated membrane protein 8 ,Trafficking ,biology ,Research ,MSBP1 ,Binding protein ,fungi ,Arabidopsis ,Wild type ,Signal transducing adaptor protein ,Lipid bilayer fusion ,Plant Science ,biology.organism_classification ,Fusion protein ,Cell biology ,Biochemistry ,SNARE ,Signal transduction ,BR - Abstract
Background N-ethyl-maleimide sensitive factor adaptor protein receptor (SNAREs) domain-containing proteins were known as key players in vesicle-associated membrane fusion. Genetic screening has revealed the function of SNAREs in different aspects of plant biology, but the role of many SNAREs are still unknown. In this study, we have characterized the role of Arabidopsis Qc-SNARE protein AtBS14b in brassinosteroids (BRs) signaling pathway. Results AtBS14b overexpression (AtBS14b ox) plants exhibited short hypocotyl and petioles lengths as well as insensitivity to exogenously supplied BR, while AtBS14b mutants did not show any visible BR-dependent morphological differences. BR biosynthesis enzyme BR6OX2 expression was slightly lower in AtBS14b ox than in wild type plants. Further BR-mediated repression of BR6OX2, CPD and DWF4 was inhibited in AtBS14b ox plants. AtBS14b-mCherry fusion protein localized in vesicular compartments surrounding plasma membrane in N. benthamiana leaves. In addition, isolation of AtBS14b-interacting BR signaling protein, which localized in plasma membrane, showed that AtBS14b directly interacted with membrane steroid binding protein 1 (MSBP1), but did not interact with BAK1 or BRI1. Conclusion These data suggested that Qc-SNARE protein AtBS14b is the first SNARE protein identified that interacts with MSBP1, and the overexpression of AtBS14b modulates BR response in Arabidopsis.
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- 2014
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34. Comparison of photodegradative rate of rhodamine B assisted by two kinds of TI02 films
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Ying Ma and Jian-nian Yao
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Anatase ,Environmental Engineering ,Aqueous solution ,Health, Toxicology and Mutagenesis ,Kinetics ,Public Health, Environmental and Occupational Health ,Analytical chemistry ,General Medicine ,General Chemistry ,Photochemistry ,Pollution ,Rhodamine ,Absorbance ,chemistry.chemical_compound ,chemistry ,Photocatalysis ,Rhodamine B ,Environmental Chemistry ,Exponential decay - Abstract
Rhodamine B (RB) was used as a molecular probe to make a comparison of the photocatalytic properties between a P-25 coated film and a dip-coated anatase Ti02 film. It was found that RB on the two illuminated TiO2 surfaces underwent very different changes. The reduction of RB concentration on a P-25 film showed pseudo first-order kinetics during all the reaction time. In contrast, the concentration of the RB aqueous solution with an anatase Ti02 film did not show exponential decay through overall illumination time, but the kinetics of RB (or rhodamine) disappearance was apparently first order with respect to time before and after blue shift of the maximum absorbance (corresponding to N-de-ethylation) ended separately.
- Published
- 1999
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35. Photodegradation of Rhodamine B catalyzed by TiO2 thin films
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Ying Ma and Jian-nian Yao
- Subjects
Anatase ,General Chemical Engineering ,General Physics and Astronomy ,General Chemistry ,Photochemistry ,Rhodamine ,chemistry.chemical_compound ,symbols.namesake ,chemistry ,Rhodamine B ,Photocatalysis ,symbols ,Crystallite ,Thin film ,Raman spectroscopy ,Photodegradation - Abstract
Transparent TiO2 thin films were prepared on glass substrates by a sol-gel method. They were confirmed to be anatase crystallites by X-ray diffraction (XRD) and Raman spectra analyses. The photocatalytic properties of the sol-gel derived films were assessed by measuring the photodegradative oxidation of Rhodamine A in aqueous solution and compared with Degussa P-25 coated films. These SG-TiO2 films showed much higher photoactivity than P-25 coated films at the initial time of the reaction. Results of this study also indicate that the photodegradative mechanisms assisted by the two kinds of films are obviously different: highly efficient and fast N-de-ethylation accompanied the degradation of Rhodamine B catalyzed by a SG-TiO2 thin film, whereas only degradative reaction took place when P-25 coated film existed.
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- 1998
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36. The Fractal Aggregation of Latexes Sterically Stabilized by Hydrophilic Chains
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Peng Wei Zhu, Donald H. Napper, and Song Nian Yao
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Steric effects ,Ethylene oxide ,Electrolyte ,Fractal dimension ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Biomaterials ,chemistry.chemical_compound ,Colloid and Surface Chemistry ,Fractal ,Hydrophily ,chemistry ,Chemical engineering ,Polymer chemistry ,PEG ratio ,Cluster (physics) - Abstract
The fractal dimensions of aggregates of latex particles coated by poly(ethylene oxide) (PEO) have been measured in worse-than-θ-solvents for different electrolyte concentrations and temperatures. For the lowest molecular weight PEG studied (2 × 10 4 ), the measured fractal dimension of 2.1 was almost independent of temperature over the range studied. The value corresponds to partially reversible cluster aggregation, which leads to relatively compact aggregates. For the highest molecular weight PEG studied (6 × 10 5 ), the fractal dimension decreased significantly (from 2.4 to 1.7) with temperature, signifying the generation of more ramified aggregates. The results obtained for this hydrophilic polymer contrast markedly with those previously published for the aggregation or latexes coated by the hydrophobic polymer poly( N -isopropylacrylamide), which becomes hydrophobic as a result of a coil-to-globule transition.
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- 1995
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37. Investigation of glucose-modified liposomes using polyethylene glycols with different chain lengths as the linkers for brain targeting
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Xiankun Li, Nian Yao, Mingqing Yuan, Jie Tang, Qianyu Zhang, Wei Fan, Huali Chen, Qiang Zhang, Fulan Xie, Qin He, Yao Qin, Yong Wu, and Li Hai
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Medicine (General) ,Biodistribution ,Biophysics ,Drug delivery to the brain ,Pharmaceutical Science ,Bioengineering ,polyethylene glycols ,Blood–brain barrier ,Biomaterials ,Mice ,R5-920 ,Drug Delivery Systems ,Drug Stability ,In vivo ,International Journal of Nanomedicine ,Coumarins ,Drug Discovery ,medicine ,Animals ,Tissue Distribution ,brain-targeted ,Original Research ,Brain Chemistry ,Liposome ,Analysis of Variance ,Spectroscopy, Near-Infrared ,Chemistry ,Organic Chemistry ,Glucose transporter ,Brain ,General Medicine ,stomatognathic diseases ,Thiazoles ,medicine.anatomical_structure ,Glucose ,Biochemistry ,Blood-Brain Barrier ,Nanoparticles for drug delivery to the brain ,Liposomes ,liposome ,BBB ,Ex vivo - Abstract
Fulan Xie1,*, Nian Yao1,*, Yao Qin1, Qianyu Zhang1, Huali Chen1, Mingqing Yuan1, Jie Tang1, Xiankun Li1, Wei Fan1, Qiang Zhang2, Yong Wu1, Li Hai1, Qin He11Key Laboratory of Drug Targeting and Drug Delivery Systems, West China School of Pharmacy, Sichuan University, Chengdu, People's Republic of China; 2State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, People's Republic of China *These authors contributed equally to this workBackground: An intimidating challenge to transporting drugs into the brain parenchyma is the presence of the blood–brain barrier (BBB). Glucose is an essential nutritional substance for brain function sustenance, which cannot be synthesized by the brain. Its transport primarily depends on the glucose transporters on the brain capillary endothelial cells. In this paper, the brain-targeted properties of glucose-modified liposomes using polyethylene glycols with different chain lengths as the linkers were compared and evaluated to establish an optimized drug-delivery system.Methods: Coumarin 6-loaded liposomes (GLU200-LIP, GLU400-LIP, GLU1000-LIP, and GLU2000-LIP) composed of phospholipids and glucose-derived cholesterols were prepared by thin-film dispersion-ultrasound method. The BBB model in vitro was developed to evaluate the transendothelial ability of the different liposomes crossing the BBB. The biodistribution of liposomes in the mice brains was identified by in vivo and ex vivo nearinfrared fluorescence imaging and confocal laser scanning microscopy and further analyzed quantitatively by high-performance liquid chromatography.Results: Glucose-derived cholesterols were synthesized and identified, and coumarin 6-loaded liposomes were prepared successfully. The particle sizes of the four types of glucose-modified liposomes were around or smaller than 100 nm with a polydispersity index less than 0.300. GLU400-LIP, GLU1000-LIP, and GLU2000-LIP achieved higher cumulative cleared volumes on BBB model in vitro after 6 hours compared with GLU200-LIP (P < 0.05) and were significantly higher than that of the conventional liposome (P < 0.001). The qualitative and quantitative biodistribution results in the mice showed that the accumulation of GLU1000-LIP in the brain was the highest among all the groups (P < 0.01 versus LIP).Conclusion: The data indicated that GLU400-LIP, GLU1000-LIP, and GLU2000-LIP all possess the potential of brain targeting, among which GLU1000-LIP, as a promising drug-delivery system, exhibited the strongest brain delivery capacity.Keywords: glucose, polyethylene glycols, liposome, BBB, brain-targeted
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- 2012
38. Large deviation principles for Markov processes via Phi-Sobolev inequalities
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Liming Wu and Nian Yao
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Statistics and Probability ,Pure mathematics ,Mathematical analysis ,Banach space ,Markov process ,Sample mean and sample covariance ,large deviations ,Separable space ,Sobolev inequality ,symbols.namesake ,symbols ,functional inequalities ,Large deviations theory ,60F15 ,Statistics, Probability and Uncertainty ,Orlicz space ,Rate function ,Mathematics - Abstract
Via Phi-Sobolev inequalities, we give some sharp integrability conditions on $F$ for the large deviation principle of the empirical mean $\frac{1}{T}{\int_{0}^{T}{F(X_{s})}ds}$ for large time $T$, where $F$ is unbounded with values in some separable Banach space. Several examples are provided.
- Published
- 2008
39. Investigation of glucose-modified liposomes using polyethylene glycols with different chain lengths as the linkers for brain targeting.
- Author
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Fulan Xie, Nian Yao, Yao Qin, Qianyu Zhang, Huali Chen, Mingqing Yuan, Jie Tang, Xiankun Li, Wei Fan, Qiang Zhang, Yong Wu, Li Hai, and Qin He
- Published
- 2012
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40. Photochromic behavior of nanocomposite hybrid films of finely dispersed phosphotungstic acid particles into polyacrylamide.
- Author
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Wei Feng, Tie Rui Zhang, Yan Liu, Ran Lu, Yingying Zhao, and Jian Nian Yao
- Subjects
NANOSTRUCTURED materials ,PHOTOCHROMIC materials ,POLYACRYLAMIDE ,THIN films ,MATERIALS ,NANOTECHNOLOGY - Abstract
A series of nanocomposite hybrid films consisting of phosphotungstic acid (PW12) and polyacrylamide (PAM) were prepared. TEM images showed that PW12 particles with average diameter of tens of nanometer were finely dispersed in the film. FT-IR results suggested that the Keggin geometry of PW12 was still preserved inside the matrix and a charge-transfer bridge was built between PW12 and PAM through hydrogen bonds. Under UV irradiation, PW12 was reduced photochemically to yield various mixed-valency colored species ("heteropoly blues" or "heteropoly browns"). The extent of photoreduction was concerned with the concentration of PW12 and irradiation time. The presence and diffusion of oxygen played an important role in reversibility of photochromism. [ABSTRACT FROM AUTHOR]
- Published
- 2003
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41. Self-assembled PMo12 3-DODA+ composite superlattice thin films with photochromic properties.
- Author
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Rui Zhang, Tie, Feng, Wei, Lu, Ran, Yan Bao, Chun, Tong Zhang, Xin, Jin Li, Tie, Ying Zhao, Ying, and Nian Yao, Jian
- Abstract
A layered superlattice PMo
12 3- DODA+ self-assembled composite film has been successfully prepared. Infrared (IR) spectra revealed that the Keggin structure characteristic of the PMo12 O40 3- anion was preserved in the composite film. A well-ordered superlattice structure, d spacing of 2.945 nm, was identified by X-ray diffraction (XRD). The superlattice film showed good photochromic properties. On irradiation with UV light, the transparent film changed from light yellow to blue. Then, bleaching occurred when the film was in contact with ambient air or O2 in the dark. The photochromic mechanism was studied by electron spin resonance (ESR), IR spectra, and UV-Vis spectra. [ABSTRACT FROM AUTHOR]- Published
- 2002
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42. Self-assembled PMo123-DODA+composite superlattice thin films with photochromic properties
- Author
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Rui Zhang, Tie, Feng, Wei, Lu, Ran, Yan Bao, Chun, Tong Zhang, Xin, Jin Li, Tie, Ying Zhao, Ying, and Nian Yao, Jian
- Abstract
A layered superlattice PMo123-DODA+self-assembled composite film has been successfully prepared. Infrared (IR) spectra revealed that the Keggin structure characteristic of the PMo12O403-anion was preserved in the composite film. A well-ordered superlattice structure, d spacing of 2.945 nm, was identified by X-ray diffraction (XRD). The superlattice film showed good photochromic properties. On irradiation with UV light, the transparent film changed from light yellow to blue. Then, bleaching occurred when the film was in contact with ambient air or O2in the dark. The photochromic mechanism was studied by electron spin resonance (ESR), IR spectra, and UV-Vis spectra.
- Published
- 2002
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43. Photochromic Inorganic/Organic Self-Assembled Superlattice Films.
- Author
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Chen Zh, Ma Y, Zhang Xt, Liu B, and Yao Jn
- Abstract
Phosphotungstic acid (PW(12)) and 1,10-diaminodecane (1,10-DAD) molecules have been alternatively assembled on 3-aminopropyltriethyoxysilane modified quartz or silicon substrate to form multicomposite mutilayer thin films by the molecular deposition technique. Thus-obtained films were characterized by UV-visible, XRD, X-ray reflection (XRR), and XPS spectra. Results show that the layer-by-layer self-assembly of PW(12) and 1,10-DAD leads to a well-ordered superlattice-layered structure with a d-spacing of 3.19 nm, which exhibits extremely exciting photochromic properties. Based on the experimental data, a presumable interlayer structural model has also been suggested. Copyright 2001 Academic Press.
- Published
- 2001
- Full Text
- View/download PDF
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