用于修饰淀粉的碳水化合物酶

用各种碳水化合物酶处理的被修饰淀粉的功能特性在食品科技界被广泛关注。酶被用于修饰淀粉,改变其结构特性,以便在食品和其它工业中应用。水解直链淀粉的酶如环糊精降解酶能用于生产各种直链淀粉。当去比例酶与淀粉反应,支链淀粉的支链将被改变,得到的被修饰淀粉在冻融过程中很稳定,在食品工业中有极大的应用前景。作者试图将地衣芽孢杆菌(bacilluslicheniformis)中的麦芽基因淀粉酶(maltogenicamylase)基因引入土豆基因组来改造土豆淀粉,生产新型碳水化合物。在该转基因土豆淀粉中,支链淀粉的支链长度有重新分配。     

Optimization of Digital Growth of Thick N-Polar InGaN by MOCVD

Smooth 200 nm thick N-polar InGaN films were grown by metal–organic chemical vapor deposition (MOCVD) on sapphire using a digital approach consisting of a constant In, Ga, and N precursor flow with pulsed injection of H2 into the N2 carrier gas. Using this growth scheme, the H2 injection time was altered and the effect on the morphology and indium incorporation in the films observed. The effect of periodic insertion of additional GaN inter-layers on the surface morphology of the InGaN layers was also studied.     

Novel Design of Master Manipulator for Robotic Catheter System

International Journal of Control, Automation and Systems - This paper presents a new master manipulator applied to robotic systems for arrhythmia ablation. The manipulator is designed to implement...     

Software and hardware-based audio-video crypto steganalysis model for enhancing robustness and imperceptibility of secured data

Nowadays for the privacy and security of secret data, information like audio, signature, thumb, voice, and fingerprints are the most emerging parameters and hence its authentication has received more attention due to its need for different applications. This paper develops innovative and efficient forensic software and hardware-based audio-video crypto -steganalysis model to enhance robustness and imperceptibility. All the existing diamond encoding (DE) approaches are always used to conceal one secret bit to create a diamond shape with objectionable manipulation error and hence, it is not a perfect solution for the security of hidden secret data, embedding capacity (EC), imperceptibility, and robustness. To overcome these limits, the proposed approach integrates all kinds of secret data such as Text, Image, Mp3, .Wav, Voice with many bits vertically and horizontally using the Adaptive Pixel Block Mapping Diamond Encoding Technique (APBMDET). It is used to generate a New Diamond Characteristic Value (NDCV) function which is equal to log₂(4s²?+?4s?+?5) - ary notations. Moreover, to enhance the security of hidden data, robustness, and imperceptibility, the forensic authentication technique and various types of attacks are applied to stego video. It is observed that original and stego audio-video does not deviate from each other. The obtained theoretical analysis and experimental results through LabVIEW and Field Programmable Gate Array (FPGA) show the effectiveness of the proposed novel technique which is used to maintain a very good recovery of both original and secret data without any distortion with larger data conceal capacity as compared to any existing techniques.

     

phenanthrene biodegradation in soil slurry systems: Influence of salicylate and triton X-100

The effects of a nonionic surfactant (Triton X-100) and a metabolic inducer (salicylate) were investigated in order to enhance the biodegradation rate of phenanthrene in soil slurry systems. The addition of salicylate reduced the time for the complete degradation of phenanthrene up to about 3 times (12.9 mg/L-d) even at highly concentrated soils of 650 mg/kg. The inducer was beneficial not only by increasing metabolic activity of existing cells, but also by increasing cell mass since it was utilized as an additional carbon source. The fraction of fast growing bacteria in total with salicylate addition was much higher compared to that without salicylate. The addition of Triton X-100 ranging from 0 to 10 g/L increased the apparent solubility of phenanthrene in soil slurry, but significantly inhibited the phenanthrene degradation in both slurry and pure liquid systems without any inhibition to cell growth. The phenanthrene degradation was inhibited much more with increasing the surfactant concentration. The inhibition by surfactant addition might be due to the prevention of bacterial adhesion to phenanthrene sorbed to soil and/or decrease of micellar-phase bioavailability     

Study on the heating behavior of Ni-embedded thermoplastic polyurethane adhesive film via induction heating

The heating behavior of nanoscopic and microscopic Nickel particle-embedded thermoplastic polyurethane (TPU) adhesive under induction heating is studied. Different particle sizes and content of Nickel were applied to TPU with varying film thicknesses and output power of the induction heater. From the results, heat generation of the TPU films increased with increases in Nickel content, TPU film thickness, and output power. The heat generation of the Nickel particle-embedded TPU films was in the order of 70 nm > 1 µm > 70 µm > 20 µm in terms of particle size, and this result can be explained by increases in the ratio of eddy current heating to hysteresis heating with increases in particle size.