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The deposition of diamond-like carbon(DLC) coating on the surface of martensitic stainless steel improves the wear properties and corrosion properties of the material. However, as the thermal expansion coefficients and elastic moduli of the martensitic stainless steel and the DLC coating are not matched and the affinity of the interface atoms is poor, the bonding force between the DLC coating and the martensitic stainless steel is insufficient and the thickness of the coating is limited. As a result, the application of the coating is also limited. In view of the above deficiencies, the effective measures and achievements made by domestic and foreign scholars to improve the adhesion and corrosion resistance of DLC coating deposited on the surface of martensitic stainless steel were summarized. The measures mainly included nitriding treatment of the surface of martensitic stainless steel, optimizing process parameters, and designing one-layer and multi-layer transition layer structures to alleviate the problems of corrosion resistance and bonding force between DLC coating and martensitic stainless steel. Finally, the development trend of preparation of DLC protective coating on martensitic stainless steel surface was prospected.

In order to further explore the application effect of bio-organic fertilizer and microbial agents instead of some chemical fertilizers on peanuts, the experiment was conducted with no fertilization, local usual fertilization and recommended conventional fertilization as the control group, respectively. Then, the effects of 80%, 60%, 50% and 40% conventional fertilizer combined with the bio-organic fertilizer and microbial agent on the growth, yield, fertilizer contribution rate and economic benefits of peanut were studied. The results showed that there was no significant difference in the main agronomic traits and pod traits between the treatment of 40%-80% conventional fertilizer combined with the bio-organic fertilizer and microbial agent and the treatment of local usual fertilization and conventional fertilizer. In terms of yield, fertilizer contribution rate and economic benefit, 50% conventional fertilizer + 50% bio-organic fertilizer + microbial agent had the best performance, and the fertilizer contribution rate was 10.60%. Compared with the local usual fertilization and conventional fertilization, the yield increased by 1.43% and 1.96%, respectively, and the income increased by 3.56% and 0.60%, respectively. The performance of 60% conventional fertilizer + 40% bio-organic fertilizer + microbial agent was the second, and the fertilizer contribution rate was 10.31%. Compared with the local usual fertilization and conventional fertilization, the yield increased by 1.10% and 1.63%, respectively, and the income increased by 3.28% and 0.35%, respectively. In summary, under the conditions of this experiment, it was advisable to reduce the amount of chemical fertilizer by 40%-50% on the basis of the application of bio-organic fertilizer and microbial agent. [ABSTRACT FROM AUTHOR]

Xinhua phosphorus is a sedimentary phosphate deposit in China with strong REEs enrichment. In this study, Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) and Inductively Coupled Plasma-Atomic Emission Spectrometer (ICP-AES) as well as rock-mineral identification, major and trace elements analysis together with sedimentology theory have been used to study geochemical characteristics of REEs in Xinhua phosphate rocks. ∑REEs of Xinhua phosphate rocks range from 800×10-6 to 1200×10-6 and are dominated by LREEs and Yttrium. REEs occur in collophanite by isomorphism dominantly. REEs pattern curves show remarkably negative Ce anomaies with values ranging from 0.28 to 0.36 in Xinhua phosphate rocks, which are similar to those of Kunyang phosphate rocks, indicating phosphorus in the south of the upper Yangtze was formed in an oxidative environment and precipitated at the stable epicontinental sea of the passive continental margin. However, REEs pattern curves of the upper black shales and weak Ce and Eu anomalies are different from those of Xinhua phosphate rocks, which reflect black shales were formed in a deep and bathyal sea of a reductive environment. The Meishucunian period had a transgression process and the Meishucunian stage had an upward deep regressive sequence, the boundary between phosphate rocks and black shales possibly being a third-order even less scale sequence boundary. All of this sedimentology information is helpful to reveal the sequence of stratigraphy and marine sedimentary environment, which provides evidence for biological outbreak and stratigraphy sequence of early Cambrian in the Yangtze area, South China.

Objective: To establish chromatographic fingerprint of Pericarpium Citri Reticultae from Guangdong province by HPLC and comparison of citrus herbs similarity with different strains and different origin, it was expected to fix standard of quality control., Methods: 26 samples' analysis was performed on Diamonsil C18 column (250 mm x 4.6 mm, 5 microm) with gradient mobile phase of acetonitrile-1% acetic acid,fingerprint was finished in 65 min, the monitoring wavelength was at 330 nm with the flow rate of 1.0 mL/min., Results: Establishing the fingerprint of Pericarpium Citri Reticultae from Guangdong province, 17 common peaks were found in the HPLC fingerprints from different sources, the similarity of Pericarpium Citri Reticultae from Guangdong province above 0.975 and quite different for different origin drugs., Conclusion: This method is simple, accurate with good reproducibility, and can be used specifically for the quality control of Pericarpium Citri Reticultae from Guangdong province.

Objective: to evaluate the risk factors for postoperative pulmonary complications following transoral operation for the atlanta-axis disorders., Methods: total 104 cases were collected from January 2005 to June 2009. Twelve variables among patients with PPCs and without PPCs were analyzed by logistic regression analysis., Results: the incidence of postoperative pulmonary complications following transoral operation for the atlanta-axis disorders was 22.1% (23/104). There was significantly difference in 9 variables between patients with PPCs and without PPCs, and 5 variables as serum albumin < 35 g/L (OR = 15.185, P = 0.003), tracheotomy (OR = 32.254, P = 0.015), Frankle grade (OR = 8.866, P = 0.001), the duration of intubation > 4 d (OR = 7.934, P = 0.002), the duration of surgery > 6 h (OR = 16.889, P = 0.006) were found to be significantly related to the development to postoperative pulmonary complications by multivariate analysis., Conclusion: serum albumin < 35 g/L, tracheotomy, Frankle grade, the duration of intubation > 4 d, the duration of surgery > 6 h are the risk factors for postoperative pulmonary complications following transoral operation for the atlanta-axis disorders.

Objective: To determine the contents of hesperidin, nobiletin and tangeretin in Citrus reticulata 'Chachi' from various habitats and different collecting periods (from October to December) and study the dynamic change of three flavonoids constituents., Methods: The HPLC method was used for analysis the contents of flavonoids in Citrus reticulata 'Chachi'. The system used a Diamonsil C18 column (250 mm x 4.6 mm, 5 microm) with gradient mobile phase of acetonitrile-methanol (80:20)-2% acetic acid. The monitoring wavelength was at 283 nm and 330 nm and the column temperature was at 25 degrees C with the flow rate of 1.0 ml/min., Results: The contents of hesperidin, nobiletin and tangeretin in Citrus reticulata 'Chachi' collecting from various habitats descended gradually with the mature of fruit, especially in nobiletin and tangeretin., Conclusion: The method was simple, convenient and can be used to provide some foundation for the quality control of Citrus reticulata 'Chachi'.