Stress concentration on a bolt thread, resulting from its own special shape, poses threat to the fatigue strength of bolt, which directly affects safety and reliability aircraft. In this paper, deep rolling was applied thread improve resistance. The properties plastic deformation layer, including surface morphology, microstructure, hardness, residual stress, as well life were characterized by m...

Chemical modification of α-amylase from locale bacteria isolate Bacillus subtilis ITBCCB148 using citraconic anhydride has been performed. increase thermal stability of the enzyme has successfully been done. The results showed that the modified enzymes with citraconic anhydride with modification degree of 45, 73, 82, 83, and 88% have similar optimum pH of 5.5 and optimum temperature of 60°C; ki...

The determination of creatinine levels in biological fluids is an increasingly important clinical requirement. Amperometric biosensors have been developed based on a three-enzyme system which converts creatinine to amperometrically measurable hydrogen peroxide. The development of the amperometric creatinine biosensor has been slow due the complexity of the three-enzyme system. This paper, the f...

Chemical RNA modifications are present in all kingdoms of life and many of these post-transcriptional modifications are conserved throughout evolution. However, most of the research has been performed on single cell organisms, whereas little is known about how RNA modifications contribute to the development of metazoans. In recent years, the identification of RNA modification genes in genome wi...

Do women suffering from borderline symptomatology differ from women without these symptoms regarding their motives for body modifications?A sample of 289 women with body modifications were questioned about their tattoos, piercings and motives for body modifications as well as about symptoms of borderline personality disorder. Women with borderline symptomatology were compared to women without b...

starch is a versatile and useful polymer having physicochemical properties that can be altered by chemicals or enzymatic modification and/or physical treatment. native starches possess many disadvantages that decrease their application and industrial use, but could be modified to obtain the desired properties to meet industrial needs for a wide range of starch applications. physically modified ...

proteins are not only considered as a nutritional source but also are responsible for a number of functional properties such as solubility, emulsification, foaming capacity and gel formation in food products. however, insolubility of the proteins (as can be seen in gluten) and therefore their insufficient functional properties have created some limita-tions for their incorporation in formulated...

The robustness and service life of inkjet printed electronic circuit structures are highly influenced by the state of the interface between these structures and the substrate. In the case of polymeric substrate materials, surface modification is necessary to realise a favourable interface, as these materials are generally not very receptive to chemical bond formation with the deposited ink. Thi...

BACKGROUND The aim of this study was to evaluate nutritional status, food intake, and dysphagia in long-term head and neck cancer survivors. METHODS Thirty-two patients with stage III-IV head and neck cancer treated by chemoradiotherapy were invited to evaluate nutritional status (malnutrition, relative weight loss), food intake (food modification; quality), and dysphagia. RESULTS At a medi...

New types of modifications of histones keep emerging. Recently, histone H4K8 2-hydroxyisobutyrylation (H4K8hib) was identified as an evolutionarily conserved modification. However, how this modification is regulated within a cell is still elusive, and the enzymes adding and removing 2-hydroxyisobutyrylation have not been found. Here, we report that the amount of H4K8hib fluctuates in response t...