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Search Results: 1 - 10 of 117241 matches for " Bo Zhang "
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Extraction Process Validation of Isatis Radix  [PDF]
Junshan Li, Bo Zhang
Pharmacology & Pharmacy (PP) , 2014, DOI: 10.4236/pp.2014.54043

This study is aimed to validate the extraction process of Isatis Radix. Using near infrared spectroscopy and high performance liquid chromatography to determine the uridine, adenosine, guanosine contents in Isatis Radix Solution, as well as NIR to monitor the extraction process. The results indicate that the existing extraction is optimized to extract thoroughly.

Influence of the Artificial Substrates on the Attachment Behavior of Litopenaeus vannamei in the Intensive Culture Condition
Bo Zhang
International Journal of Animal and Veterinary Advances , 2011,
Abstract: This study evaluated the influence of artificial substrates on the attachment behavior of Litopenaeus vannamei reared in the intensive culture condition. L. vannamei were grown from PL60 (60-day-old postlarvae) for 8 weeks at high density (500 shrimp per m2) in 12 independent aquaria (1.0×1.0×1.5 m, water surface area 1 m-2, water volume 1000 l). The experimental design consisted of four treatments: Group A (GA), artificial substrates were immersed in water all the time; Group B (GB), artificial substrates immersed in water were taken out of water weekly and returned immediately; Group C (GC), artificial substrates were exchanged weekly by new one, and Group D (GD) without artificial substrates. With a longer rearing time, the increase of the percentage of shrimp attachment on artificial substrates demonstrated continuous in GA but discontinuous in GB and GC. Meanwhile, based on the mean of weeks, the percentage of shrimp attachment on artificial substrates in GA was significantly higher than those in GB and BC from the second week. The final weight, survival rate and final biomass of the shrimp reared in the treatment with artificial substrates were significantly higher than those in other treatment without artificial substrates. However, there was not significant difference in Food Conversion Rate (FCR) among different experimental treatments. So, we suggested that the differences of shrimp growth parameters were affected mainly by the living space added with the addition of artificial substrates.
Evaluation of Plant Extracts from Illicium verum for the Control of Museum Insect Pest Demestes maculatus
Bo Zhang
International Journal of Animal and Veterinary Advances , 2012,
Abstract: To assess the insecticidal activity of extracts from Illicium verum against museum insect pest Demestes maculates, mortalities of its larvae and adults under different dose or treatment time were investigated by bioassay methods. Results showed that both extracts (anise oil and (E)-anethole) were highly toxic to both life stages (larvae and adults) of D. maculatus. Furthermore, the insecticidal activity was dependent upon both dose and exposure time. With the increasing of the dose level and the exposure time, higher mortality was obtained. On the other hand, results also indicated that D. maculatus adults were more tolerant against the extracts from I. verum than larvae. At the same time, it was interesting to demonstrate that the toxicity of anise oil was more effective than (E)-anethole against D. maculatus under the same experimental condition. The highest mortality 95% was achieved at 72 h with anise oil against larvae at a dose of 32/cm3. As naturally occurring insect-control agents, the I. verum extracts described could be useful for managing populations of museum pest D. maculates.
Some New Results about The Period of Recurring Decimal
Bo Zhang
International Journal of Advanced Computer Sciences and Applications , 2011,
Abstract: This study mainly discusses period problem of recurring decimals.According to Euler theorem, this paper gives the computation formula of period of recurring decimal, relation of the period and least positive period, and the necessary and sufficient condition that the period is eaqual to least positive period.
Identification Problem of Source Term of A Reaction Diffusion Equation
Bo Zhang
International Journal of Advanced Computer Sciences and Applications , 2011,
Abstract: This paper will give the numerical difference scheme with Dirichlet boundary condition, and prove stability and convergence of the difference scheme, final numerical experiment results also confirm effectiveness of the algorithm.
Study on the Efficacy of Freezing Against Museum Pest Insect Demestes maculates
Bo Zhang
Current Research Journal of Biological Sciences , 2012,
Abstract: Museum taxidermies have traditionally relied on toxic chemicals for the prevention and treatment of pest infestations. However, concern over the health and safety implications of the use of chemicals in the museum environment, effectiveness, and potential adverse effects on museum specimens and associated materials has promoted investigation into alternative control methods. One such method is the use of freezing. The efficacy of freezing against museum pest insect Demestes maculates was evaluated. Results show that all pests tested at the surface of tanned skin failed to survive beyond 6 h of exposure of the temperature -20oC. However, the insulating properties of both the tanned skin and the stuff straw affected insecticidal effect by slowing the spread rate of cold air. Moreover, results also indicated that the rate of cooling played a key role in the course of eradication with freezing. With the increasing of the time of temperature equilibrium, the time from the point of equilibrium temperature to the point of obtaining 100% mortality increased significantly. It was suggested that the adaptation of pest insect against freezing would be strengthened and the freezing time would be prolonged if the temperature decreased slowly.
Development of Sandglass Shape FBG Sensor to Reduce Cross Sensitivity Effect
Bo Zhang
International Journal of Optics , 2013, DOI: 10.1155/2013/636987
Abstract: Fiber Bragg grating (FBG) sensors have received considerable attention in applications of temperature, axial strain, and transverse pressure measurement. However, the cross-sensitivity of strain and temperature measurement is the key problem of FBG sensors. In this paper, a sandglass shape FBG is proposed to divide cross-sensitivity of temperature and transverse pressure. The principle and structure of sandglass FBG are introduced, and the experiment results show cross-sensitivity avoidable in the transverse pressure sensor. 1. Introduction Fiber Bragg grating (FBG) has unique advantages compared to metal sensors such as immunity to electromagnetic interference, compact size, potential low cost, and the possibility of distributed measurement over a long distance, which have been reported as sensors for many measurements including temperature, strain, vacuum, and refractive index. FBG sensors have received great attention for applications in modern stress measurement and optical distribution sensing networks [1]. However, the cross-sensitivity effects of FBGs, like force, displacement, or pressure effects tangled with temperature effect, make it difficult to separately determine the temperature and other parameters by measurement of the wavelength shift of single-FBG sensor, which reduce the utilization value in the field [2, 3]. In this paper, an approach to resolve the cross-sensitivity of FBGs is proposed and demonstrated, which is using the sandglass coat shape of FBG with and polyimide polymers to resolve the cross-sensitivity problem during the demodulation. As an application of this approach, simultaneous measurement of axial strain, and temperature with sandglass FBG coatings is reported. 2. Cross-Sensitivity Effect of FBGs As shown in Figure 1, an FBG of 1?cm in the grating length was inscribed on a standard telecommunication single-mode optical fiber (corning SMF-28). Figure 1: Refractive index distributions of FBG and transmission and reflection characters. The Bragg resonance wavelength of a FBG, , which is the center wavelength of light back reflected from the grating, depends on the effective index of refraction of the core and the periodic spacing of the grating ( ) through the relation . Parameters such as and are affected by changes in strain and temperature. The shift in the Bragg resonance wavelength due to the changes in the temperature and strain can be described by The first term in (1) represents the temperature effect on the FBG and the second term describes the strain effect. The fractional wavelength shift corresponding to a
Our Journal is Moving Forward
Bo Zhang
Trends in Renewable Energy , 2017, DOI: 10.17737/tre.2017.3.1.0032
Abstract: Happy New Year to all enthusiastic authors and editorial team members. The Trends in Renewable Energy (TRE) successfully concluded the second volume, and heading to another year. We deeply appreciate your support, and are looking forward to continuously working with all colleagues around the world. The 2016 TRE Author of the Year Award goes to Dr. Athanasios G. Lazaropoulos at the National Technical University of Athens, Greece. Dr. Lazaropoulos contributed over 10 high quality papers to our journal during last two years. The great support of the authors encourages us to improve. The 2016 TRE Paper of the Year goes to “A Review of Hydrothermal Carbonization of Carbohydrates for Carbon Spheres Preparation” (DOI: 10.17737/tre.2015.1.1.009). Within a short period of time, this paper received 6 citations including 3 external citations. Both the effort of authors and the power of open-access showed impacts to the renewable energy field. During last two years, we have been accumulating knowledge of running a scientific journal. Now is the time to move forward. We are pursuing to be indexed in renowned indexes, such as the Directory of Open Access Journals (DOAJ), the Science Citation Index (SCI of Web of Science Core Collection), and Ei Compendex. To prepare this journal to pass the evaluations conducted by multiple indexes, the journal is now an open accessed, peer-reviewed semi-annual journal with completely Free-of-Charge publication policy (i.e. no cost to authors and readers). We will continue the TRE’s mission to publish quality reviews, original research, and application-oriented papers, providing a communication platform that is run exclusively by scientists working in the renewable energy field. Papers are invited on any individual topic related to renewable energy or those that are interdisciplinary.
Statistical Heuristic Search
Zhang Bo,Zhang Ling
计算机科学技术学报 , 1987,
Abstract: Under certain hypothesis a heuristic search can be considered as a random sampling process.Thus,itis possible to transfer the statistical inference method to the heuristic search.Based on the idea above,in1—4]we have incorporated some specific statistical inference method into heuristic searches,andobtained some new statistical heuristic search algorithms——SA,WSA etc.The characteristics and thedetails of the algorithms have also been discussed.In this paper we go further into the subject and discuss the combination of the two techniques over awider range.
A Relation Matrix Approach to Labelling Temporal Relations in Scheduling
Zhang Bo,Zhang Ling
计算机科学技术学报 , 1991,
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