When ultraviolet (UV) absorption spectroscopy technology is used for nitric oxide (NO) detection, the background noise will directly affect accuracy of concentration inversion, especially in low concentrations. Traditional processing methods attempt to eliminate noise, which damages spectrum characteristics. However, stochastic resonance (SR) can utilize extract a weak characteristic signal. This paper reports monostable (MSR) model an UV NO spectrum. By analyzing characteristics NO,...

A new caffeoylgluconic acid derivative, trans-caffeoyl-6-O-d-gluconic methyl ester (1), together with two known compounds named trans-caffeoyl-6-O-d-glucono-γ-lactone (2) and (3), was isolated from the nearly ripe fruits of Evodia rutaecarpa (Juss.) Benth.. These were by various separation methods associated UPLC-Q-TOF-MS technique. Their structures elucidated on basis extensive spectroscopic methods.

To facilitate the biodegradation of diesel oil, an oil bacterial consortium was constructed. The alkane hydroxylase (alkB) gene Pseudomonas putida GPo1 constructed in a pCom8 expression vector, and pCom8-GPo1 alkB plasmid transformed into Escherichia coli DH5α. AlkB protein expressed by induction detected through SDS-polyacrylamide gel electrophoresis. culture recombinant (pCom8-GPo1 alkB/E. DH5α) with increased degradation ratio at 24 h from 31% to 50%, facilitation rates were as proportion...

Caffeoylgluconic acid derivatives are characteristic constituents isolated from the aqueous extract of Fructus Euodiae. In this research focusing on caffeoylgluconic derivatives, trans-caffeoyl-6-O-d-gluconic (CGA), methyl ester (CGA-ME), and trans-caffeoyl-6-O-d-glucono-γ-lactone (CGA-LT), a systematic study stability was performed under different temperatures pH levels by ultra performance liquid chromatography-diode array detector (UPLC-DAD) detector/electrospray...

Some highly efficient diesel oil-degrading bacteria were isolated from bilge water. One strain C7 was identified as Pseudomonas sp. based on its 16S rDNA gene sequence as well various morphological, physiological and phylogenetic characteristics. The biodegradation potential characteristics of in conditions analyzed. GC-MS analysis showed that this could degrade most components oil, the degradation rate up to 75.9% after ten days incubation at optimal condition which included a temperature...

Mucinous tumors of the ovary, Specific AT sequence binding protein 2, Cytokeratin 20, Pathological typing, Prognostic outcome.This study aims to evaluate co-expression specific 2 (SATB2 Group) and 20 (CK20 in mucinous ovarian their correlation with tumor pathological classification prognostic outcome.One hundred sixty cases diagnosed from January 2018 2020 were selected.They divided into four groups: cystadenocarcinoma group (age 62.78±7.92,n=53), borderline 63.82±9.26,n=55),...

Dynamic performance of a water hydraulic piston pump with flat valves was analyzed．Its mathematic model established and influence factors were studied by simulation. The results show that reducing clearance volume, lighting spool quality increasing spring stiffness are favorable to promote the valve. In addition, higher vacuum degree too high rotational speed will make valve delay more seriously. Work pressure also has on opening valve．

High nitrogen fertilizer input is the main manner to maintain high-yield crops in farmland China. The average application quantity of China significantly higher than some developed countries world. However, utilization efficiency very low. Thus, high sensitivity sensing and on-line monitoring ammonia concentration were needed quickly acquire soil nutrient information get efficiency. A sensor used has been based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) technology, frequency...

The laser opto micro actuator induced by a beam is proposed. In the Intermediate region of molecular gas dynamics, small fluid machinery rotated dynamics effect with energy conversion from to thermal energy. this paper effects supporting systems, rotor materials, powers on rotational phenomena are discussed experimental approach. systems an axis were changed permanent magnet for radial bearing. Aluminum and glass selected materials. By bearing rates faster than rate alumimum 2.5 times.

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Gaseous ammonia is the most abundant alkaline trace gas in atmosphere. As plays an important role acid deposition and aerosol formation, it influences regional air quality atmospheric visibility. TDLAS (Tunable Diode Laser Absorption Spectroscopy)is a method to obtain spectroscopy of single molecule absorption line characteristic spectrum region as distributed feed back (DFB) diode laser with narrow linewidth tunability, which makes possible detect trace-gas qualitatively or...

This non-invasive gas monitor for exhaust monitoring must has high reliability and requires little maintenance. Monitor in-situ measurements using tunable diode laser absorption spectroscopy (TDLAS) in the near infrared, can meet these requirements. TDLAS evolved over past decade from a laboratory especially to an accepted, robust reliable technology trace sensing. With features of tunability narrow linewidth distributed feedback (DFB) by precisely tuning output wavelength single isolated...

The boom of Internet applications has resulted in ever increasing demands for new network services support. Different require different QoS, protocols and security mechanisms to be deployed the network. These demand evolve keep pace with change application requirements. As current Internet's functions are very hard expand cope changing environment. A evolutionary node architecture is proposed this paper. New services, protocols, control management can dynamically on ENN so that exhibit a...

Varying some types of substrate structure, we measured temperature difference near the Ar^+ laser spot (Φ1[mm]) between front surface on which sputtered carbon film was fabricated and rear by thermocouple to compare thermal insulation properties. The point about 2mm far from diameter is 1.3[μm]. It cleared that can gain remarkable effect inserting air layer substrate. Maximum 3-layer (top layer: Glass, second Air, third Polyimide, total: 0.558[mm]) 4 times increased than single-layer...

Objective To investigate the impact of types and concentrations major medium components on growth marine oil-degrading bacterial strain Acinetobacter sp. Y9. Methods Carbon, nitrogen phosphorus sources in Y9 fermentation were screened optimized by using single factor orthogonal experiments, was applied for initial 10 L fermentor. Results After optimization, optimal included 1% glucose, 2% peptone, 0.1 mol/L phosphate buffer solution(Na2HPO4·12H2O + KH2PO4), 0.05% NaCl2, 0.001%...