Advanced Materials Research Vols. 941-944

Abstract: YABBY family proteins are plant-specific transcriptional factors which have been identified to play roles in the growth and development of plants. The expression character of YABBY genes was important to gene functions. Members of the YABBY gene have been cloned in tomato. Our results showed that SlYABBY2 was expressed in stems, leaves and stem apexes, but barely in roots of MLK1(Lycopersicon esculentum Mill) and FL1(Lycopersicon esculentum Mill) tomato. Meanwhile, the effect of low light on SlYABBY2 expression was analyzed in MLK1 and FL1. The results showed that SlYABBY2 expression decreased after low light in leaves and stem apex of MLK1 and FL1 tomato. All results suggested that SlYABBY2 might be transcribed in stems, leaves and stem apexes and low light might have an effect on SlYABBY2 expression.

Abstract: Based on the unique redox property of electrically conductive polymers, Ca²⁺ was incorporated into polypyrrole (PPy) film that previously doped with polyelectrolyte heparin. Then the apatite-forming ability of the Ca²⁺-doped PPy was examined by a biomimetic method using stimulated body fluid (SBF), which has ion concentration nearly equal to those of human blood plasma. It was found that the Ca²⁺-doped PPy successfully formed bonelike apatite deposition on its surface after soaking in SBF for only 3 days, whereas the similar apatite deposition was formed on Ca²⁺-free PPy after soaking in SBF for 7 days. These indicated that the entrapment of Ca²⁺ into PPy could accelerate the formation of apatite deposition and the Ca²⁺-doped PPy was possessed of enhanced bioactivity. It is expected that the Ca²⁺-doped PPy would be a useful bioactive coating material of metallic medical devices or tissue engineering scaffolds to promote the bone tissue regeneration.

Abstract: A new vacuum assisted extraction (VAE) method was established and applied for the extraction of indirubin from Radix Isatidis. The major factors of VAE process such as boiling temperature, ethanol level, extraction time and extraction cycles, which have influence on the extraction yield of indirubin were tested by an orthogonal array L₉ (3⁴).The results show that the optimum extraction conditions are ethanol level 40% (v/v), boiling temperature 60 °C, extraction time 3 h and extraction 3 cycles. Under these conditions the extraction efficiency of indirubin reaches 1.091 mg/g, which is 30% higher than that by conventional heat reflux extraction at atmospheric pressure. The present results demonstrated that VAE is an efficient, simple and fast method for extracting indirubin from Radix Isatidis, which shows great potential for becoming an alternative technique for industrial scale-up applications.

Abstract: Lidar is the main standoff detection system against bioagent/bioaerosol, An infrared lidar has been developed for bioagent/bioaerosol monitoring. The overall architecture and specifications of the lidar were described. The results of overlap coefficient, horizontal and slant measurements at Hefei, such as comparison of observed horizontal extinction coefficients between commercial MPL Lidar and the IRLidar, the slant path time-space extinction coefficient distributions have been revealed and discussed. The results show that the IRLidar is a reliable lidar with advanced performances.

Abstract: Every year billion kilograms of unused feathers result from the poultry industry worldwide, which in effect impose a difficult disposal process to the environment. Chicken feathers are considered as a valuable and renewable keratin protein source, which could be used advantageously in a number of applications as alternatives to feather meal and feather disposal. Although the potential applications of keratin derived from chicken feathers have been investigated, the initial purification phase has not been fully described in the literature. Original chicken feathers contain many biological organisms along with other contaminants after plucking. Unprocessed chicken feathers are considered as potentially hazardous biological materials due to the presence of blood borne pathogens; therefore, the decontamination process is very important. The purpose of this work is to compare the effects of different purification techniques on chicken feathers prior to keratin isolation. These processes include surfactant washing, soxhlet extraction with ethanol, ozone, and sodium chlorite solutions. Thermogravimetric analysis, vibrational spectroscopy, and wide angle X-ray scattering were used to characterise the purified feathers prior to keratin extraction.

Abstract: Taking ‘Fuji’ fresh-cut apples as material, studied on the effect of different temperatures (-2 ̊C,0 ̊C,2 ̊C and 4 ̊C) on storage quality of fresh-cut apples during 25 days. The results indicated that low temperature can significantly keep the storage quality of fresh-cut apples and inhibit browning. Moreover, compared to the other treatment groups, treatment at 0 ̊C better maintained the firmness, color, as well as higher contents of titratable acid and lower MDA content, which showed 0 ̊C can extent storage time.

Abstract: Plates are most commonly used fixation devices on treatment of femoral fracture, Hwoever, due to the unique mechanical properties and the strong bearing capacity of the femur, the cases of plate broken are at the top of the body skeleton. With the femur’s healing, the stress on the femur and plate is in the process of dynamic transfer. Therefor, healing factors of femur should be considered to more fully describe the stress conditions, on femoral fracture fixation study. This paper study on titanium plate fixation of femoral fracture, analyzed the stress of the femur and plate in different healing period of the femur under different loads.

Abstract: This paper investigated the influence of operating parameters such as inlet air temperature, compressed air flow rate, concentration of carrier agent and type of carrier on the physicochemical properties of fruit juice powders produced by spray drying.The results indicated that increasing inlet air temperature resulted in the larger size particles with smoothly spherical appearance, and to lower bulk density and moisture content. The bulk density of powders also decreased with increasing carrier agent concentration, decreasing compressed air flow rate. The higher feed flow rate negatively affected process yield and positively influenced moisture content, and occurring the wall deposition easily. Additionally, the anthocyanin retention mainly depends on the inlet air temperature and type of carrier. Moreover, the novel methods and ideas to this problem in the next studies were presented.

Abstract: A novel cement fluid loss additive P1402, which synthesized using the monomers of 2-acrylamido-2-methyl-propane sulphonic acid (AMPS), acrylic acid (AA), N,N dimethyl acrylamide (DMAM) and N-Vinyl-2-pyrrolidone (NVP) by the method of aqueous solution polymerization. The ratio of monomers AMPS:AA:DMAM:NVP at 2:1.5:1:1, reaction PH at 10.8, reaction temperature at 65°Cand reaction time about 5 hours. The IR spectrum of P1402 show that the polymer with the structure of all the monomers .The fluid loss performance testing show that the forpolymers P1402 has an excellent thermal stability. The fluid loss additive P1402 has an excellent tolerance to salt and high temperature.

Abstract: A novel self-oscillating polymer displaying a high lower critical solution temperature (LCST) was developed. The novel polymer chain underwent soluble-insoluble self-oscillation induced by a Belousov–Zhabotinsky reaction. The driving force of the self-oscillation was the differing solubility of the polymer chain in the reduced and oxidized states. The amplitude of self-oscillation was hardly affected by the concentration of the oxidant, sodium bromate. In addition, the period of the polymer solution could be controlled by careful selection of the concentration of the sodium bromate.