Effect of Different Light Intensities on Total Phenolics and Flavonoids Synthesis and Anti-oxidant Activities in Young Ginger Varieties (Zingiber officinale Roscoe)

Nowadays, phytochemicals and antioxidants in plants are raising interest in consumers for their roles in the maintenance of human health. Phenolics and flavonoids are known for their health-promoting properties due to protective effects against cardiovascular disease, cancers and other disease. Ginger (Zingiber officinale) is one of the traditional folk medicinal plants and it is widely used in cooking in Malaysia. In this study, four levels of glasshouse light intensities (310, 460, 630 and 790 μmol m(-2)s(-1)) were used in order to consider the effect of light intensity on the production, accumulation and partitioning of total phenolics (TP), total flavonoids (TF) and antioxidant activities in two varieties of Malaysian young ginger (Zingiber officinale). TF biosynthesis was highest in the Halia Bara variety under 310 μmol m(-2)s(-1) and TP was high in this variety under a light intensity of 790 μmol m(-2)s(-1). The highest amount of these components accumulated in the leaves and after that in the rhizomes. Also, antioxidant activities determined by the 1,1-Diphenyl-2-picryl-hydrazyl (DPPH) assay in both of varieties, increased significantly (p ≤ 0.01) with increasing TF concentration, and high antioxidant activity was observed in the leaves of Halia Bara grown under 310 μmol m(-2)s(-1). The ferric reducing (FRAP) activity of the rhizomes was higher than that of the leaves in 310 μmol m(-2)s(-1) of sun light. This study indicates the ability of different light intensities to enhance the medicinal components and antioxidant activities of the leaves and young rhizomes of Zingiber officinale varieties. Additionally, this study also validated their medicinal potential based on TF and TP contents.     

The Observation of Lomer-Cottrell Dislocations in Boron-diffused (111) Silicon by Berg-Barrett Skew Reflections†

Skew reflections wore employed to obtain a series of Berg—Barrett x-ray diffraction micrographs of shallow boron-diffused layers in (111) silicon. Diffusion-induced dislocations with 〈110〉 singular lines were observed, and their Burgers vectors, distribution and relative density were determined. The dislocations are Lomer-Cottrell locks. Their distribution indicates that the two-step deposition-and-drive diffusion process, of the type commonly used in integrated-circuit fabrication, produces a solute profile which deviates considerably from the assumed Gaussian form. It is demonstrated that the images recorded on the x-ray micrographs represent well-defined dislocation aggregates rather than individual dislocations.     

TF成型法在冷弯中的探索及应用

随着使用者对产品外观质量要求越来越高,冷弯成型技术的不断发展和进步,TF成型法在冷弯成型中起到了很好的作用。     

一种新型RB控制策略及其实践

介绍了一种有别于传统的新型RB控制策略。实践表明该方法行之有效,对类似工程具有借鉴意义。     

Quantitative and qualitative study of spelt and wheat fibres in varying milling fractions

The fibre composition of four spelt genotypes and of three wheat genotypes was studied on three grindings: bran, whole bare grains flour for all genotypes, and whole hulled grains flour for spelt only. Insoluble fibre and soluble fibre contents were measured after removal of proteins, starch and ashes from the sample (Lee, Prosky, & De Vries, 1992). Cellulose, hemicellulose and lignin contents were measured according to the same principles with different chemical degradations of the sample (Van Soest & Wine, 1967). Spelt and wheat bran and whole grain flour displayed significant statistical differences for hemicellulose and cellulose contents. Variability amongst the spelt genotypes was much higher than amongst the wheat genotypes. The study also highlighted the special profile of the true baking variety Ressac and the richness in fibres of the landrace 140. Finally, various methods of measurement were compared and a combination of these methods was proposed for cereal grains dietary fibre analysis.     

Design and Simulation of TF and TA Controller for Missile

A nonlinear terrain following(TF) and terrain avoidance(TA) controller is proposed for missile control systems. Based on classical TF algorithm (adaptive angle method), a new method for TF controller is proposed by using angle of attack. A method of obtaining terrain outline data from digital elevation map (DEM) for TF control is discussed in order to save store space. A TA algorithm is proposed by using bank-to-turn technique. The block control model, which is suitable for backstepping design, is given for nonlinear model of missile. Making full use of the characteristics of the system and combining block control principle and backstepping technique, a robust controller design method is proposed. Uncertainties in every sub-block are allowed, and can be canceled by using the idea of nonlinear damping. It is proved that the state tracking errors are converged to a neighborhood of the origin exponentially. Finally, nonlinear six-degree-of-freedom simulation results for the missile model are presented to demonstrate the effectiveness of the proposed control law.     

高频激励CO2激光器1.5kW低阶模多折腔研究

介绍了高频激励千瓦级激光器低阶模多折腔的设计过程和实验结果,获得模式结构TEM00+TEM01的1.5kW输出,发散角为1.63mrad,M2=1.70。     

针对高速公路场景下的TF协同优化思路与方案

随着LTE的建设与应用推广,TDD-LTE由于其频率特性及上下行时隙配比等原因,在容量、深度覆盖方面已难以满足用户日益增长的业务需求。在此背景下,TF协同优化成为了容量分流、提升客户感知的重要思路并广受关注。然而,不同场景的业务及用户分布等特性各异,在制定具体策略时,需针对该场景特点制定个性化的协同优化策略。机场高速作为城市的门户与形象窗口,其网络质量一直是各运营商优化工作关注的重点。本文基于某市机场高速场景,探讨了TF协同优化实现原理、策略与具体优化方案,为制定场景个性化TF协同策略,解决重点场景负荷过高、用户体验感知差、深度覆盖不足等提供了思路。     

Estimation of theaflavin content in black tea using electronic tongue

Biochemical components like theaflavins (TF) play very important role in the quality of finished CTC (cut, torn, and curled) variety of tea. TF are known to provide characteristic astringency to the taste of finished CTC tea. The quality indicators like brightness, briskness, strength, color and overall quality of tea liquor are also due to the amount of TF present. A positive correlation is normally observed between the amount of TF and the quality scores of finished tea. Biochemical tests that yield the percentage of TF are often time consuming, require meticulous effort of sample preparation, storage and measurement. This paper proposes an alternative approach of quality evaluation of CTC tea by predicting the amount of TF that may be present in a given tea sample, using a voltammetric electronic tongue.     

Thermal analysis of toroidal field coil in EAST at 3.7 K

The thermal performance of toroidal field (TF) coil is studied at 3.7 K in Experimental Advanced Superconducting Tokamak device (EAST) to obtain the higher stability for the higher plasma parameters operation. It is a good way to lower the operating temperature of TF coil to acquire the higher stability margin. This paper describes the structure and cooling process design of TF coil and case firstly. Based on the thermal load in the case, the thermal performance of the TF coil is performed at the plasma disruption state. The helium temperature in the cable-in-conduit conductor (CICC) and case is evaluated during the 1.5 MA plasma disruptions. Then, the experimental results of TF coil which has been cooled at 3.7 K and discharged in 10 kA are shown including the thermal loss evaluation. Finally, the thermal stability performance of TF coil is analyzed according to the 3.7 K experimental results and the stability prediction is performed at 1.5 MA plasma current operations.