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Search Results: 1 - 10 of 15717 matches for " hypoerellin B "
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Quenching of fluorescence in membrane protein by hypocrellin B
Jiachang Yue,Suzhen Pang
Science China Life Sciences , 1997, DOI: 10.1007/BF02882048
Abstract: The hypocrellin B (HB) was used as a fluorescence quencher to study the basic physical charactcristics of HB in membrane systems, including the diffusion speed of quencher from aqueous phase into membrane phase, the partition coefficient (P) of quenchtr between membrane and water, and the fluorescence quenching constant of protein (Ksv; Kq,). The experimental results show that the quenching of fluorescence in membrane protein by HB can be determined by the principle of dynamic quenching. The experimental process of fluorescence quenching was observed in detail by using the ESR technique. The signal of HB- was found to arise from an electron transfer from excited trytophan to HB.
Occult Hepatitis B Flare-up after Chemotherapy Treatment in HBsAg Negative Patient  [PDF]
Shoaib Ahmad, Vu Le, Tauseef Ali
International Journal of Clinical Medicine (IJCM) , 2011, DOI: 10.4236/ijcm.2011.25103
Abstract: Reactivation of Hepatitis B virus causing liver damage is a concern in patients with chronic HBV infections who receive immunosuppressive or cytotoxic treatments. HBV screening should be considered for all patients going to receive immunosuppressive regimens which have the potential to induce reactivation of HBV infection. We discuss here a case of occult Hepatitis B flare after chemotherapy in a patient who had negative acute hepatitis profile including HBsAg prior to therapy and baseline serum AST, ALT, INR, albumin, bilirubin and serum creatinine were within normal limits.
b-Chromatic Number of M[Cn],M[Pn],M[F1,n] and M[Wn]  [PDF]
Duraisamy Vijayalakshmi, Kandasamy Thilagavathi, Narayanan Roopesh
Open Journal of Discrete Mathematics (OJDM) , 2011, DOI: 10.4236/ojdm.2011.12010
Abstract: In this paper, we discuss about the b-colouring and b-chromatic number for middle graph of Cycle, Path, Fan graph and Wheel graph denoted as M[Cn],M[Pn],M[F1,n] and M[Wn] .
The Effect of Media on Biomass and Oil Production in Botryococcus braunii Strains Kossou-4 and Overjuyo-3  [PDF]
Khalid A. Al-Hothaly, Aidyn Mouradov, Abdulatif A. Mansur, Brian H. May, Andrew S. Ball, Eric M. Adetutu
International Journal of Clean Coal and Energy (IJCCE) , 2015, DOI: 10.4236/ijcce.2015.41002
The green algae Botryococcus braunii is widely recognized as a source of oil, including hydrocarbons. However, the slow rate of growth B. braunii hampers its commercial development. This stu- dy addresses this by examining the effects of three growth media on biomass and oil production in two B. braunii Race B strains, Kossou-4 and Overjuyo-3. Growth of B. braunii strains in BG11 medium resulted in significantly higher growth (2.3 - 4.2 and 2.9 - 6.0 fold increases in Kossou-4 and Overjuyo-3 respectively) compared to the JM and BBM-3N media after 15 days. A similar trend was obtained when biomass was measured indirectly using optical density (OD) and chlorophyll fluo-rescence. Oil production was also significantly higher in BG11 whether measured as oil weight or absorbance (ODs at 680 and 750 nm). However, the presence of extracellular oil was shown to in-crease absorbance values making OD measurements less reliable than dry weight assays. Maximum recovery of oil was recorded when hexane was used as solvent compared to hexane-isopro- panol and heptane. These results suggest that BG11 is the best growth medium for these two strains under the conditions of this experiment.
Hepatitis B Virus Infection in B-Cell Non-Hodgkin’s Lymphoma, and Effect of Entecavir in Prophylactic Antiviral Therapy  [PDF]
Jinjing Chen, Haizhen Yi, Hong Cen, Wei Yan
Health (Health) , 2016, DOI: 10.4236/health.2016.85053
Abstract: Background: specialized studies on hepatitis B virus (HBV) infection and B-NHL (B-cell Non-Hodgkin’s Lymphoma) are limited, as well as prophylactic antiviral therapy for B-NHL patients with HBV infection who are receiving anticancer chemotherapy. This study aims to investigate the association between HBV infection and B-NHL, and to evaluate the effect of prophylactic antiviral therapy for HBV-infected B-NHL patients. Study design: A retrospective, case-control study was performed. The study group included 420 patients with B-NHL who were consecutively diagnosed from May 2003 to October 2013 (age range, 14 - 71 years), and the control group included 1280 Chinese residents in Guangxi who participated in the Health Survey (age range, 18 - 74 years). We compared the prevalence rate of HBV infection and clinic-pathologic characteristics between the two groups. The prevalence rate of HBV infection in our study was 34.7% (146/420), higher than the prevalence rate of 13.9% (178/1280) in the general population (P < 0.001). Among 146 B-NHL patients who received anticancer chemotherapy, 104 patients (71.2%) received prophylactic antiviral therapy. Conclusion: This study provides evidence that HBV may play an important role in development of B-NHL. Entecavir maybe the better antiviral drugs than Lamivudine, and antiviral therapy is maintained more than 6 months that maybe the optimal duration of prophylactic antiviral therapy. But further investigation should be conducted for determination of optimal duration and monitoring of antiviral therapy.
Krige Method Application for the Coverage Analysis of a Node-B in a WCDMA Network  [PDF]
Jazmín Ponce-Rojas, Sergio Vidal-Beltrán, José Luis López-Bonilla, Montserrat Jimenez-Licea
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2011, DOI: 10.4236/ijcns.2011.43022
Abstract: This paper shows the procedure and application of the Krige Method (or Kriging) for the analysis of the power level radiated by a Base Station (also called Node B), through a group of samples of this power level, measured at different positions and distances. These samples were obtained using an spectrum analyzer, which will allow to have georeferenced measurements, to implement the interpolation process and generate coverage maps, making possible to know the power level distribution and therefore understand the behavior and performance of the Node B.
How Suppliers Marketing Their Competence to Customers—From the Perspective of Customer Reference

刘石兰, 叶娜
Modern Marketing (MOM) , 2015, DOI: 10.12677/MOM.2015.52003
Customer reference is a key tool and way for suppliers to marketing their competencies to cus-tomers in B2B markets. This paper put forward four methods of competence marketing based on the role of customer reference in marketing competence: showing referrer customer lists and their reference letters, communicating successful stories and customer cases, distributing news material and media reports about their technology successes, and arranging potential customers to visit referrer customer’s firm. These conclusions provide some new opinions and insights for other scholars to research this topic, and offer some different approaches for industrial suppliers to do marketing of competence to customers.
Performance Evaluation of Enterprise-Wide Network that Its Backbone Is Based on Leased Trunk  [PDF]
Ajibo Augustine, Igboeli Chukwudi, Ani Cosmas
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2015, DOI: 10.4236/ijcns.2015.810037
Abstract: Asynchronous Transfer Mode (ATM) has been recommended and has been accepted by industry as the transfer mode for Broadband network. Currently, large scale effort has been undertaken both in the industry and academic environment to design and build high speed ATM networks for corporate bodies. These networks are meant to support both real-time and non-real time applications with different quality of service (QoS) requirements. The resources to support the applications QoS requirements are typically limited and therefore the need to dynamically allocate resource in a fair manner becomes inevitable. In this work, an evaluation is carried out on the performance of enterprise-wide network that its backbone is based on leased trunk. The performance of the leased trunk is evaluated when loaded with homogeneous and heterogeneous traffic. The evaluation is carried out in order to determine the exact effect of traffic overload on resources-trunk transmission capacity and buffer. The aim is to define the optimum loading level and the associated QoS parameter values. A typical network was adopted, modeled and simulated in MATLAB environment by using Simulink tool and the results obtained were analyzed by using Microsoft Excel.


物理学报 , 1996,
Abstract: 采用LMTO-ASA方法,对几种不同方法获得的不尽相同的Ag(111)“稳定表面”的表面电子结构进行了系列对比研究,给出了这些不同表面弛豫结构的电子结构特性.根据表面能的大小,指出了最稳定表面结构应为单层向内弛豫表面,并对该类表面结构的电子结构特性作了分析和讨论.作为对比,还分析讨论了清洁理想Ag(001)表面的电子结构特性.根据Ag(111)和Ag(001)表面能的区别,指出Ag(001)表面较Ag(111)表面稳定
Evolution of Hepatitis B Genotype D in the Middle East and South Asia
Seyed Mohammad Jazayeri,William F.Carman
Hepatitis Monthly , 2009,
Abstract: Hepatitis B virus (HBV) has been classified into 8 genotypes, from A to H and there are some hints that the outcome of the disease and the response to therapy might be correlated to these genomic groups (although not as serious as hepatitis C virus [HCV]).Hepatitis B virus genotypes show a characteristic geographic distribution with a proposed association with human migration. Several scientific fields are employed for the study of human population history, including archaeology, linguistics, anthropology and, recently, genetics. Thanks to the introduction of modern technology into genetics in the past two decades, humans have been facing some very interesting findings about their history. Besides mitochondrial DNA sequence analysis, persistent viruses have opened a new window into this area, especially HBV. But why?It is of interest that the prevalence of HBV genotypes throughout the world is clearly linked to migration. For example, the ancestors of Eskimos migrated from South East (SE) Asia to the North and passed through the Behring channel to Alaska, which partially explains why there was as high a prevalence of hepatitis B surface antigen (HBsAg) positivity in this area as in SE Asia (1).Second, in some studies (2-5) from South America, genotypes E and A, which are the dominant types in Africans, were found in an area with genotype F/H dominancy. They derived from those with African descent who came into South America during the slave trading period a few hundred years ago. In our own research (6) in the Pacific region (which is an endemic area with genotype C dominancy) we compared HBV surface and core genes with the ones from SE Asian patients and from international databases. The gradient of nucleotide and amino acid variations from west to east in our study were most consistent with the hypothesis of migration of Polynesian people from Southern China through Melanesia and Fiji and their radiation across the Pacific to fill the Polynesian triangle in different times. We also found an interesting association that supported the immigration history of SE Asian ancestors southwards and their colonization in the Pacific islands.D is the most prevalent and the most distributed genotype. It is found in Western populations, the Indian subcontinent, The Middle East and North of Africa. Genotype D contains 4 subgroups (D1 to D4) and 2 subtypes (ayw2 and ayw3). We have collected all the available data from India (7-18), Bangladesh (Jazayeri, unpublished), Turkey (19-33), Pakistan (34-39), and Iran (40-48). We considered the relationship between the potenti
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