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During postharvest storage, spinach is prone to problems such as oxidation, dehydration, wilting and decay, causing severe losses. In view of this, postharvest spinach was treated with 1 μL/L 1-methylcyclopropene (1-MCP), 0.1% phytic acid (PA) or their combination to explore the effects of preservatives on the physiology and storage quality of spinach. Spinach not treated with preservatives was used as a control. All samples were stored at room temperature (20 ± 1) ℃ and a relative humidity between 80% and 90%. The decay index, mass loss percentage, chlorophyll content, soluble solid content, ethylene release, peroxidase (POD) activity and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging capacity were measured. In addition, sensory evaluation was performed in terms of appearance, morphology and smell. The results showed that all three treatments were effective in maintaining spinach quality. Specifically, compared with the other three groups, combined treatment with 1-MCP and PA significantly enhanced peroxidase (POD) activity and DPPH radical-scavenging capacity, thereby delaying the increase in decay index, mass loss percentage and ethylene release and increasing the chlorophyll content of spinach and maintaining high soluble solid content and sensory evaluation score during storage. As a result, 1 μL/L 1-MCP + 0.1% PA composite treatment had the best preservation effect, which could effectively delay the postharvest senescence and quality deterioration of spinach.

In this paper the single-use protective clothing for medical use was sterilized by γ-ray irradiation. Compared with the non-irradiated control, the apparent morphology of PP melt-blown fiber and amboss had no fracture. According to the national standard of GB/T 19082-2009, the mechanical properties, resistance to synthetic blood penetration, resistance to water penetration and filtering efficiency were measured. The results showed that the post-irradiation effects did not decrease the resistance to synthetic blood penetration or water penetration. Moreover, the filtering efficiency remained higher than 99.8%. On the other hand, the mechanical properties were reduced significantly due to the degradation of poly chain of PP induced by γ-ray irradiation. It has been assured that the important properties of single-use protective clothing for medical use are still above the quality level after γ-ray irradiation sterilization process. which can supply reference for the produce single-use protection of clothing of medical purpose at high quality.

Abstract Objective This paper intends to report our experiences by using an operation of off-pump occlusion of trans-thoracic minimal invasive surgery (OPOTTMIS) on the treatment of consecutive 210 patients with simple congenital heart diseases (CHD) including atrial septal defect (ASD), ventricular septal defect (VSD) and patent ductus arteriosus (PDA). Methods The retrospective clinical data of OPOTTMIS in our institute were collected and compared to other therapeutic measures adopted in the relevant literatures. After operation, all the patients received electrocardiography (ECG) and echocardiography (echo) once a month within the initial 3 months, and no less than once every 3 ~ 6 months later. Results The successful rate of the performed OPOTTMIS operation was 99.5%, the mortality and complication incidence within 72 hours were 0.5% and 4.8%, respectively. There were no major complications during peri-operation such as cardiac rupture, infective endocarditis, strokes, haemolysis and thrombosis. The post-operation follow-up outcomes by ECG and echo checks of 3 months to 5 years showed that there were no III° AVB, no obvious Occluder migration and device broken and no moderate cardiac valve regurgitation, except 1 VSD and 1 PDA with mild residual shunts, and 2 PDA with heart expansion after operation. However, all the patients' heart functions were in class I~II according to NYH standard. Conclusion The OPOTTMIS is a safe, less complex, feasible and effective choice to selected simple CHD patients with some good advantages and favorable short term efficacies.

A method for determination of the content of neutral aromatic components from cigarette mainstream smoke by semi-preparative high performance liquid chromatography (semi-preparative HPLC) coupled with gas chromatography-mass spectrometry (GC-MS) was developed: the fraction collection time was determined to three time periods by optimizing the conditions of semi-preparative HPLC in order to ensure that the compounds to be measured don't cross in the fractions. The selected ion chromatogram showed that all target compounds could be separated completely in three fractions and the method could satisfy the demands of quantitative analysis. Quantitative analysis was performed by establishing a GC-MS internal standard curve. The analysis results showed that the correlation coefficients were greater than 0. 999 0, the limits of detection (LOD) were 0.55~13.06 µg/kg and the limits of quantitation (LOQ) were 1.85~43.55 µg/kg. It showed that the method has high sensitivity. The results of sample determination and recovery experiment showed that the average added standard recovery of the neutral aromatic components from cigarette mainstream smoke was in the range of 64.39%~93.57% and the relative standard deviations were less than 10%. It showed that the method could satisfy the requirement of quantitative analysis of trace compounds, with good reproducibility. [ABSTRACT FROM AUTHOR]

Bi1-xHoxFeO3(BHFO, x = 0, 0.05, 0.10, 0.15, 0.20) nanoparticles were successfully synthesized via a simple double solvents based sol-gel route. X-ray diffraction analysis shows the BHFO samples with x = 0-0.10 are pure-phased perovskite structure. Scanning electron microscopy images reveal that the BHFO particles are in nano scale. UV-Vis measurement was taken to determine the band gap of BHFO samples, suggesting the band gap of BHFO samples can be modulated by Ho doping. The absorption spectra of RhB solution show that the BHFO nanoparticles have photocatalytic effect of degrading RhB organic dye which reaches a maximum of 42% for x = 0.10. Well-shaped M–H hysteresis loops of BHFO nanoparticles were observed at 300 K. The magnetism at room temperature is obviously enhanced by Ho doping. For x = 0.10, the BHFO sample performed the strongest ferromagnetism (Ms= 5.3 emu/g, Mr= 1.5 emu/g). The result confirms the contribution of Ho3+towards enhancement of ferromagnetic properties of BiFeO3. [ABSTRACT FROM AUTHOR]

Bi1-xCexFe1-yCoyO3(BCFCO, x = 0, 0.05, 0.1, 0.15; y = 0, 0.05, 0.1, 0.15) particles were synthesized by a sol-gel method to enhance the electrical and magnetic properties of BiFeO3. The structure and morphology properties of Bi1-xCexFe1-yCoyO3particles were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM). XRD patterns show that the BCFCO particles are main single-phase perovskite structure with R3c space group. The enhancement of room-temperature ferromagnetism was obtained in the BCFCO particles. Obvious hysteresis loops of BCFCO were observed, which indicate ferromagnetic order. BCFCO particles exhibit reduction in leakage current density. [ABSTRACT FROM AUTHOR]

Six representative strains were selected from peanut stem rot plants collected from Shandong Province. Morphological characteristics, pathogenicity and biological characteristics of 6 representative strains were studied. Ribosomal DNA - ITS sequence analysis showed that the sequence homology of these 6 strains was up to 99% . The tested 6 isolates were confirmed as one species. The homology of DNA - ITS sequences of the 6 strains was up to more than 99% compared with Lasiodiplodia spp (synonyms Diplodia) in GenBank. According to morphological characteristics, pathogenicity test and biological characteristics of the 6 tested strains, and combined with the ribosomal rDNA - ITS sequence analysis, the pathogen of peanut stem rot from Shandong Province was identified as Diplodia gossypina [ABSTRACT FROM AUTHOR]

BiFeO3(BFO), BiFe0.95Co0.05O3(BFCO), Bi0.9Nd0.1FeO3(BNFO) and Bi0.9Nd0.1Fe0.925Co0.075O3(BNFCO) thin films were prepared on Pt/Ti/SiO2/Si(111) substrates by chemical solution deposition (CSD) method. The structural and electrical properties of the thin films were studied. X-ray diffraction analysis showed that the films were single perovskite structure and a phase transition appeared in BNFO and BNFCO thin films. Electrical measurements indicated that the ferroelectric properties of BFO thin films were significantly improved by Nd and Co codoping. Well saturated hysteresis characteristic with large remanent polarization were observed in BNFCO thin film. The conduction mechanisms were investigated to understand the different conduction behavior in these thin films. [ABSTRACT FROM AUTHOR]