Applied Mechanics and Materials Vols. 633-634

Abstract: The spectral characteristics of benzoyl peroxide in the range of 0.3 to 1.6 in THz region is obtained by THz time-domain spectroscopy, the refraction and absorption spectra of benzoyl peroxide is got,meanwhile. The experimental result shows that, the benzoyl peroxide has the absorption peak at the wave band of 0.36621THz,0.498THz,0.92285THz,1.11328THz, the most obvious of which is at the wave band of 0.92285THz.The terahertz absorption spectra of the mixture of flour and benzoyl peroxide is studied at the same time.This experimental study provides a new method to detect benzoyl peroxide illegally added in food.

Abstract: With the increasing social demand for oil and gas resources, the exploration and development of unconventional oil and gas reservoirs will pay more and more attention. Tight sandstone reservoir classification is one of the important tasks in the research of unconventional oil and gas exploration and development.Limitations exist in tight sandstone reservoir classification by various conventional logging.A method for the classification of tight sandstone reservoir based on support vector machine is presented in this paper, combining with the core data and flow unit to establish the reservoir classification standard. Tight sandstone reservoirs of no coring wells are classified based on the model made by support vector machine using conventional logging.The application results show that this method has high suitability and identification accuracy.

Abstract: Pathological changes in animal models of autoimmune hepatitis and liver cells were similar to the mechanism of injury and viral hepatitis, the thesis of the active component of several common liver substances studied, wild chrysanthemum extract has anti-bacterial, anti-viral, pharmacological effects such as anti-inflammatory and immune liver and nerve protection, Dicliptera polysaccharide with excellent hepatoprotective activity of the liver that can be used as an adjunct to clinical medicine. Introduction

Abstract: Effects of sorbitol derivative surfactants on the stability of pyrolysis oil emulsion prepared from plastic waste were experimentally investigated. The water-pyrolysis oil mixture emulsified by Sorbitan monooleate (Span 80) surfactant is more stable than the water-in-oil emulsions prepared by other Sorbitol derivative surfactants which have lower hydrophilic-lipophilic balance (HLB) numbers. The Span 80 concentration of 1.5% by volume was found to produce the most stable emulsion and the smallest average water droplet. This optimal surfactant concentration is the same as critical micelle concentration.

Abstract: In order to test the performance of the resulting membrane oxygenator, a model was constructed to simulate the inner and extracorporeal gas exchange of the human body. The oxygenation capacity of the membrane oxygenator was studied using fresh bovine blood with added anticoagulants as the test medium. The oxygenation performance of the prepared membrane was equal to that of the commercial membrane. After six hours of operation, the oxygen saturation (SaO2) was above 95%, and the partial pressure of oxygen (PaO2) was over 13.5 kPa (100 mmHg). This model was constructed in accordance with the basic principles of extracorporeal circulation, and could be used to investigate the oxygenation performance of a membrane oxygenator, as well as to study the basic principles of extracorporeal circulation.

Abstract: In this paper, the nonlinear dynamic system of microbe continuous fermentation products 1,3-propanediol (1,3-PD) is rewritten by improving the specific cellular growth rate, specific substrate consumption rate and specific product formation rate. Firstly, under the condition of substrate glycol excess and active trans-membrane transport, according to the dynamic behavior the fermentation process, we consider the glycerol and 1,3–PD concentration within the cell, and improve the specific cellular growth rate, specific substrate consumption rate and specific product formation rate, then rewrite the dynamic system of microbial continuous fermentation process. Secondly, taking the dynamic system as main constraint condition, we establish the parameter identification model and prove the existence of the optimal solution. Lastly, the numerical results calculated by particle swarm algorithm show that the improved model is suitable for describe the dynamic behavior of 1,3-PD, but is not accurate enough for by-products.

Abstract: Sugarcane bagasse was used as start materials to extract nanocellulose fibers. The morphology was investigated by scanning electron microscopy. The result indicated that the nanocellulose is successfully extracted by a series of alkali and acid treatment. The nancellulose is characterized by nanowire structure, and possesses high aspect ratio.

Abstract: In order to improve the mechanical properties of bio composites and reduce the cost of materials, this paper studies the Impact of three fillers-talcum powder, montmorillonite and lignin sulfonate-on the compressive strength and impact absorbing energy of biomass composite, and observes the effects of three fillers on the foam structures by SEM experiments. The study found that sodium lignosulfonate is a good dispersant and water reducing agent, forming the most uniform pore structure in the molded foam process, and this mesh frame structure of biomass composite with three-dimensional and uniform pores shows better effect of compressive resistance and buffering.

Abstract: Polysaccharides, the mainly bioactive ingredient of Radix Astragali, were evaluated for its effects on the oxidative stress induced by exhaustive swimming exercise of mice. A total of 48 mice were randomly divided into four groups: control group, low-dose polysaccharide from Astragali radix (RAP) treated group, medium-dose RAP treated group, and high-dose RAP treated group. The control group received only distilled water ig, and the RAP treated groups received different doses of RAP (50, 100, and 200 mg/kg, ig) for 28 days. After the final treatment with RAP, the mice were subjected to swimming to exhaustion and the superoxide dismutase (SOD), glutathione peroxidase (GPx) and catalase (CAT) were measured. The data showed that RAP promote increases in the activities of SOD, GPX and CAT in liver and muscle of mice, and the high-dose RAP (200 mg/kg) presented the best effect. These results indicated that RAP possessed protective effects against exercise-induced oxidative stress.

Abstract: The present study reports that a sustained release profile could be transferred into a biphasic drug release profile when a hydrophilic polymer was encapsulated into the medicated microparticles. The multiple component composite microparticles were fabricated using a single fluid electrospraying process to treat a co-dissolving solution consisting of a polymer matrix (shellac), an active ingredient (FA), and an additional hydrophilic polymer (poly vinyl pyrrolidone, PVP). FESEM results showed that the microparticles M1 consisting of shellac and FA had an average diameter of 1.27 ± 0.38 μm, whereas the microparticles M2 consisting of shellac, FA and PVP had an average diameter of 1.51 ± 0.34 μm. Both the two types of microparticles were essentially amorphous composites due to the favourable secondary interactions between the components, as demonstrated by ATR-FTIR tests. In vitro dissolution tests demonstrated that the addition of PVP in the microparticles M2 made them give a typical biphasic drug release profile, whereas the double-component microparticles provided a sustained release profile. This study shows a simple way for developing advanced drug delivery systems through tailoring the components of polymer excipients using electrospraying.