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Search Results: 1 - 10 of 13845 matches for " Chunli Xue "
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Investigation on the Competition Interaction of Synthetic Food Colorants and Ciprofloxacin Hydrochloride with Bovine Serum Albumin by Fluorescence Spectroscopy
Baosheng Liu,Chao Yang,Jing Wang,Chunli Xue,Yunkai Lü
Journal of Thermodynamics , 2011, DOI: 10.1155/2011/137531
Abstract: The effects of synthetic food colorants like tartrazine (TTZ), sunset yellow (SY), and erythrosine (ETS) on the binding reaction between ciprofloxacin hydrochloride (CPFX) and bovine serum albumin (BSA) were investigated by fluorescence spectroscopy in the aqueous solution of pH = 7.40. Results showed that CPFX caused the fluorescence quenching of BSA through a static quenching procedure and the primary binding site was located at subdomain IIA of BSA (site I). According to the calculated thermodynamic parameters, it confirmed that CPFX bound to BSA by electrostatic interaction. In addition, the colorants affected the formation of BSA-CPFX complex. This resulted in an increase of the free, biological active fraction of CPFX. The binding distance of BSA-CPFX systems was evaluated according to Förster's theory. Results suggested that the binding distance were increased in the presence of synthetic food colorants.
Investigation on the Competition Interaction of Synthetic Food Colorants and Ciprofloxacin Hydrochloride with Bovine Serum Albumin by Fluorescence Spectroscopy
Baosheng Liu,Chao Yang,Jing Wang,Chunli Xue,Yunkai Lü
Journal of Thermodynamics , 2011, DOI: 10.1155/2011/137531
Abstract: The effects of synthetic food colorants like tartrazine (TTZ), sunset yellow (SY), and erythrosine (ETS) on the binding reaction between ciprofloxacin hydrochloride (CPFX) and bovine serum albumin (BSA) were investigated by fluorescence spectroscopy in the aqueous solution of pH = 7.40. Results showed that CPFX caused the fluorescence quenching of BSA through a static quenching procedure and the primary binding site was located at subdomain IIA of BSA (site I). According to the calculated thermodynamic parameters, it confirmed that CPFX bound to BSA by electrostatic interaction. In addition, the colorants affected the formation of BSA-CPFX complex. This resulted in an increase of the free, biological active fraction of CPFX. The binding distance of BSA-CPFX systems was evaluated according to F?rster's theory. Results suggested that the binding distance were increased in the presence of synthetic food colorants. 1. Introduction When drugs are absorbed, they enter the circulatory system and bind to serum albumin extensively and reversibly [1]. The effectiveness of drugs depends on their combination abilities. Binding of drugs to serum albumin has significance in pharmacology, since it controls their free concentrations and, as a consequence to the degree and time of action in the body, affects duration and intensity of their effects [2–4]. In other words, binding to serum albumin will significantly affect the distribution, metabolism, and excretion of drugs. Drugs are subjected to the influences of many factors in vivo, among which dietary habits cannot be ignored. Interactions between diet and drugs reflect the change of pharmacodynamics and the incompatibilities. There are various researches about the influences of sugar, wine, and tea on the efficacy of a medicine [5, 6]. However, researches about the effects of synthetic food colorants on medication have not been reported. Ciprofloxacin hydrochloride (CPFX, the structure is shown in Figure 1) which belongs to the third-generation synthetics of quinolones shows striking potency against enteric Gram-negative bacilli, lesser activity against nonenteric Gram-negative bacilli and staphylococci, and generally marginal activity against streptococci and anaerobes [7, 8]. It has received much attention because of its broad-spectrum pharmacological activities and extensive biological effects. Tartrazine (TTZ), sunset yellow (SY), and erythrosine (ETS, structures are shown in Figure 1) are common synthetic food colorants, which are widely used in food like drinks, candies, and in sugar-coated capsules for
Temperature Calculation of Pellet Rotary Kiln Based on Texture  [PDF]
Chunli Lin, Yufan Wu
Intelligent Control and Automation (ICA) , 2017, DOI: 10.4236/ica.2017.82005
Abstract: In order to improve the quality of clinker produced by pellet rotary kiln, flame temperature that it is a very important factor of affecting on the quality of clinker is studied. The flame images collected from pellet rotary kiln are decomposed into three gray images by the method of RGB, so we can get more information of flame. Taking advantage of gray level co-occurrence matrix, the monitoring model for flame temperature based on image texture is established with RGB channels. In order to test the universality of the algorithm, candle flame temperature is detected by this method. The maximum error of the model is less than 3%.
Translation of English and Chinese Addressing Terms from the Cultural Aspect
Chunli Yang
Journal of Language Teaching and Research , 2010, DOI: 10.4304/jltr.1.5.738-742
Abstract: Terms of address are frequently used in social communication to show the identity, rank and relationship between the speaker and the hearer. It is important to have a profound understanding of addressing terms, especially in cross-cultural communication. However, due to the difference in history, religion and culture, terms of address vary in different countries and regions. In this paper, the author discusses the translation of English and Chinese addressing terms from the aspect of cultural background. First, the author defines terms of address and gives the reason why people use terms of address in social communication. Then, the differences between English and Chinese terms of address are analyzed from the point of kinship terms and social terms of address. Last, four translation methods are given according to different situations, namely, literal translation, translating flexibly, specification or generalization and domestication and foreignization.
Cultural Differences on Chinese and English Idioms of Diet and the Translation
Chunli Yang
English Language Teaching , 2010, DOI: 10.5539/elt.v3n1p148
Abstract: Idioms is a special culture which is shaped in the daily lives of the local people, particularly the idioms of diet has a close relation with various elements, such as the eating custom , history, fairy tales, geographic situations. Also, different ways of translation on different diet idioms in English and Chinese will be analyzed in this article. As a result, it will be very important to know the great culture contents in the idioms of diet in order to do a better job in the research of cross-culture communication and the translation.
A New Specific Property of Schweizer-Sklard Operators
Chunli WANG,Shiqiang ZHANG
Studies in Mathematical Sciences , 2011, DOI: 10.3968/1975
Abstract: A new specific property of Schweizer-Sklard operators is discovered that Schweizer-Sklard operations are continued fuzzy operators. The relation between Schweizer-Sklard operators and other Fuzzy operators is analysis. The conclusion that Schweizer-Sklard operations could partly replace other fuzzy operations most in use is given. At the same time the relation between Schweizer-Sklard operations and Zadeh operations as well as probability operators is given.
The Crisis Management of Enterprise's Collective Brain Drain
Chunli Yuan,Chunying Zhang
International Business Research , 2009, DOI: 10.5539/ibr.v1n4p104
Abstract: This paper take enterprise's collective brain drain as the research object, by using of questionnaire method, historical data, experts consultation method, and other methods of construct the collective brain drain of forewarning indicators, and then use the alternative ranking method to determine and evaluate comprehensively system of indicators to the weight. By constructing the forewarning system to real-time monitor, identify, diagnose and evaluate the trend of enterprise's collective brain drain and on this basis to pre-control, the prior development of corrective measures, the crisis will be resolved in the embryonic stage. Therefore, constructing the forewarning system of enterprise's collective brain drain for the long-term stable development of enterprises has important practical significance.
Stability of Gorenstein objects in triangulated categories
Zhanping Wang,Chunli Liang
Mathematics , 2014,
Abstract: Let $\mathcal{C}$ be a triangulated category with a proper class $\xi$ of triangles. Asadollahi and Salarian introduced and studied $\xi$-Gorenstein projective and $\xi$-Gorenstein injective objects, and developed Gorenstein homological algebra in $\mathcal{C}$. In this paper, we further study Gorenstein homological properties for a triangulated category. First, we discuss the stability of $\xi$-Gorenstein projective objects, and show that the subcategory $\mathcal{GP}(\xi)$ of all $\xi$-Gorenstein projective objects has a strong stability. That is, an iteration of the procedure used to define the $\xi$-Gorenstein projective objects yields exactly the $\xi$-Gorenstein projective objects. Second, we give some equivalent characterizations for $\xi$-Gorenstein projective dimension of object in $\mathcal{C}$.
Subarea Tree Routing (STR) in Multi-hop Wireless Ad hoc Networks  [PDF]
Guikai LIU, Chunli SHAN, Gang WEI, Hongjiang WANG
Wireless Sensor Network (WSN) , 2009, DOI: 10.4236/wsn.2009.11006
Abstract: Subarea Tree Routing (STR), a new routing protocol for multi-hop wireless ad hoc networks, is proposed. The novelty of the STR protocol is to divide the whole network into many subareas constructed as a result of establishing subarea trees. Its main idea is to identify root nodes by manual configuration or auto-discovery process firstly, then the root nodes originate the process of establishing subarea trees, and finally each node either joins in a subarea tree or become an interconnect node. STR belongs to hierarchical routing protocol and does not attempt to consistently maintain routing information in every node. Furthermore, through the use of tree’s intrinsic routing function, the STR protocol exhibits hybrid behavior of proactive and on-demand routing protocols. We prove the correctness of STR, and our simulation results show that the pro-posed scheme achieves lower route discovery delays, lower route discovery load and better performance of normalized routing load in large, mobile, ad hoc networks as compared with AODV.
Neuroprotective Effects of Ginkgo Biloba Extract (GbE) on Oxygen-Glucose Deprivation (OGD) in PC12 Cells  [PDF]
Chunli Mei, Xuelu Han, Jing Zhang, Ling Gao, Huimin Liu
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.510B030
Abstract:

Ischemic cerebrovascular disease is a global health problem. According to the World Health Organization, ischemic stroke is actually the most common cause of death in the world. Ginkgo biloba extract (GbE) is a traditional Chinese medicine for angina pectoris. Ginkgo biloba plays a role in expanding blood vessels, increasing coronary and cerebral blood flow, preventing platelet aggregation, inhibiting thrombosis, and improving the microcirculation. In the present study, we investigated the mechanisms involved in the neuroprotective effects of GbE in a model of hypoxic-ischemic brain disease. We used NGF(100 ng/ml for 6 days)and OGD(5% CO2and 95% N2, 1 mmol/l NaS2O4insugar-free DMEM for 16 h) to stimulate PC12 cells and convert them into neurons in order to establish an ischemia model. The results showed that PC12 cells transformed into cells that looked like neurons and that MAP2 was up-regulated in NGF-treated PC12 cells. Cell apoptosis was found to be up-regulated after NGF stimulation and OGD. The apoptosis rate after 16 hours of OGD was 19.44%. GbE (50ng/ml) reduces apoptosis rate to 11.35%. These results may help to show that NGF treatment can be combined with OGD to establish anin vitromodel of acute ischemic brain damage. In the present study, we find that GbE effectively increases the survival rate of PC12 cells and relieves OGD damage. These results suggest that GbE has the neuroprotective effects of ischemic brain damage.


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