Recently, the acceptance of micro electromechanical systems (MEMS) technology is growing in various areas such as medical, optical, automobile and telecommunication. In realizing the needs in MEMS, techniques derived from mechanical engineering plays an essential role in the determination of geometric design variables and process parameters, experiments in fabrication and the elastic and plasti...

On-line electrogeneration of mass tags in a microspray emitter is used to quantify the number of cysteine groups in a given peptide. A finite-element simulation of the multi-step process yields the relative distribution and concentration of tags, untagged and tagged species in the microchannel before the spray event. The work focuses on the tagging of cysteine moieties in peptides or proteins b...

The principal results of daily observations with the RATAN-600 radio telescope of X-ray binary with relativistic jets microquasar SS433 in 1986–2003 are presented. We have measured the flux densities at 0.96, 2.3, 3.9, 7.7, 11.2 and 21.7 GHz in different sets, duration from a week to some months. In general there are 940 observations of SS433 and more than 4500 flux density measurements in the ...

Biomolecular solid-state NMR experiments have traditionally been collected through detection of 13C or 15N nuclei. Since these nuclei have relatively low sensitivity stemming from their smaller gyromagnetic ratios relative to 1H, the time required to collect multi-dimensional datasets serves as a limitation to resonance assignment and structure determination. One improvement in the field has be...

A preconcentration system for multi-element electrothermal atomic absorption spectrometry was developed with a microcolumn packed with a chelating resin. The proposed method was applied successfully to the simultaneous determination of Co, Ni and Cu in seawater. A sample volume of 2 ml was required for the analysis. Retention of metal ions as a complex on the microcolumn was achieved by using M...

According to the requirements and characteristics of software quality comprehensive evaluation, a matter-element extension synthesis evaluation method is introduced, and its shortcomings and problems are also discussed in the practical evaluation process. Especially, the matter-element model, correlation function, matter-element value space and multilevel metrics data transmission in the origin...

This Application Note shows the determination of protein molecular weight and size, together with linear quantifi cation using the Agilent 1260 Infi nity Multi-Detector Bio-SEC Solution. The molecular weights and sizes of proteins, ranging from cytochrome C (11 kDa) to thyroglobulin (670 kDa) were correctly determined, independent of sample loading. Using the dual angle light scattering detecto...

the objective of the present study was to investigate the effects of a sustained-release multi-trace element ruminal bolus on sex ratio, the reproductive performance and lambs growth of afshari ewes. eighty afshari cycling ewes during breeding season were used in the trial. the animals were synchronized using cidr for 14 days and assigned into 4 groups including: group 1 (n=20) received a singl...

In recent years, in order to reducing die design and manufacturing costs, Multi point forming technique has gained an increasing interest because of its high flexibility. In this process, the conventional fixed shape solid die sets are replaced with a pair of opposite matrices of controllable elements. In this paper, the fundamental principles of multi-point forming was described and the possib...