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Present and future of hydrology

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Water Science and Engineering 2013年第3期6卷 241-249页

作者： xiao-fang RUI Ning-ning LIU Qiao-ling LI xiao LIANG College of Hydrology and Water Resources Hohai University

The complexities of hydrological phenomena, the causes that lead to these complexities, and the essences and defects of reductionism are analyzed. The driving forces for the development of hydrology and the formation of branch subjects of hydrology are discussed. The theoretical basis and limitations of existing hydrology are summarized. Existing misunderstandings in the development of the watershed hydrological model are put forward. Finally, the necessity of the expansion of hydrology from linear to nonlinear is discussed.

关键词： hydrological phenomenon hydrological theory hydrological method hydrologicalmodel reductionism nonlinear

Nasal septal foreign body as a complication of dental root canal therapy: A case report

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World Journal of Clinical Cases 2021年第3期9卷 690-696页

作者： xiao-Wan Du Jun-Bo Zhang Shui-fang xiao Department of Otolaryngology Head and Neck SurgeryPeking University First HospitalBeijing 100034China

BACKGROUND Currently,there have been no reports on foreign bodies found in the nasal septum after dental root canal ***,we present an unusual case of a foreign body found in the nasal septum,which occurred after dental root canal therapy and two unsuccessful *** SUMMARY A 55-year-old man was referred to our department due to slight nasal discomfort that persisted for about 1 *** consulting our department,the patient visited three different hospitals/clinics and underwent two surgeries that were not successful in removing a foreign body completely.A computed tomography scan was performed to detect the shift of the foreign body from dental root to the nasal septum,which resulted in the healing of oral inflammation and nasal septum *** endoscopic foreign body extraction surgery(3rd removal surgery)was then successfully performed,using a needle as the *** nasal reconstruction was required after the *** healing was *** Medical healthcare professionals should consider past medical history when dealing with foreign body *** septal foreign body extraction surgery,a needle could be used as a helpful reference.

关键词： Foreign body Nasal septum Endodontic complications Fractured instruments Case report

Hydrogen induced cracking of X80 pipeline steel

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International Journal of Minerals,Metallurgy and Materials 2010年第5期17卷 579-586页

作者： Chao-fang Dong Kui xiao Zhi-yong Liu Wen-jing Yang xiao-gang Li Corrosion and Protection Center University of Science and Technology Beijing Beijing 100083 China

The hydrogen-induced cracking （HIC） behavior of X80 pipeline steel was studied by means of electrochemical charging, hydrogen permeation tests, tension test, and scanning electron microscopy （SEM）. The experimental results indicate that the increase of charging time and charging current density or the decrease of the solution pH value leads to an increase of the hydrogen content in X80 steel, which plays a key role in the initiation and propagation of HIC. It is found that the majority of macro-inclusions within the as-used X80 steel do not constitute a direct threat to HIC except aluminum oxides, which directly or indirectly lead to HIC. The hydrogen trap density at room temperature is estimated to be pretty high, and this is an essential reason why the steel is sensitive to HIC. After hydrogen charging, the elongation loss rate and area reduction of X80 steel decline obviously, taking a noticeable sign of hydrogen-induced plasticity damages. It is demonstrated that the losses of these plastic parameters have a linear relation to the fracture size due to hydrogen.

关键词： pipeline steel hydrogen induced cracking electrochemical charging fracture

Changes of corneal central thickness of aphakia following congenital cataract surgery under the first six months of life

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International Journal of Ophthalmology(English edition) 2011年第1期4卷 78-80页

作者： Wei xiao xiao-fang Liang and Jia-Jun Sun Department of Ophthalmology Shengjing Hospital of China Medical University Shenyang 110004 Liaoning Province China

AIM: To observe the central corneal thickness (CCT) changes in infants and young children who had been undergone bilateral congenital cataract surgery, and to compare the changes with normal control group which was selected from healthy population. METHODS: A cross section case-control study contained 28 cases (56 eyes) of bilateral aphakia (aphakic group) due to congenital cataract surgery combining with posterior continuous curvilinear capsulorhexis and with anterior vitrectomy during 2-6 months after birth. Fourteen children (28 eyes) of age-sex matched with the aphalic group were selected as normal control group. CCT and intraocular pressure (TOP) were measured postoperatively and the results were compared between groups. RESULTS: The mean CCT was 653.5 +/- 82.4 mu m in the aphakic group and 579.6 +/- 39.2 mu m in the control group, with a significant difference (P=0.000). The mean value of TOP in aphakic group (22.0 +/- 1.6mmHg) was greater than that of control group (16.9 +/- 2.1mmHg), P=0.023. There was a negative correlation between age and CCT in normal control group (r=-0.531, P=0.026), and there was no correlation in bilateral aphakia group (r=-0.324, P=0.165). CONCLUSION: Aphakic children due to congenital cataract surgery have a greater CCT than normal children. It is necessary to consider CCT in evaluating IOP for children after congenital cataract surgery.

关键词： congenital cataract surgery aphaka central corneal thickness introcular pressure

AtHAP5A regulates iron translocation in iron-deficient Arabidopsis thaliana

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Journal of Integrative Plant Biology 2020年第12期62卷 1910-1924页

作者： xiao fang Zhu Qi Wu Yu Ting Meng Ye Tao Ren fang Shen State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing210008China University of Chinese Academy of Sciences Beijing100049China

Iron(Fe)deficient plants employ multiple strategies to increase root uptake and root-to-shoot translocation of *** identification of genes that are responsible for these processes,and a comprehensive understanding of the regulatory effects of transcriptional networks on their expression,including transcription factors(TFs),is underway in Arabidopsis ***,we show that a Histone-or heme-associated proteins(HAP)transcription factor(TF),HAP5A,is necessary for the response to Fe deficiency in *** ex-pression was induced under Fe deficiency,and the lack of HAP5A significantly decreased Fe translocation from the root to the shoot,resulting in substantial chlorosis of the newly expanded leaves,compared with the wild-type(WT,Col-0).Further analysis found that the expression of a gene encoding nicotianamine(NA)synthase(NAS1)was dramatically decreased in the hap5a mutant,regardless of the Fe ***-one-hybrid and ChIP analyses suggested that HAP5A directly binds to the promoter region of ***,overexpression of NAS1 could rescue the chlorosis phenotype of hap5a in Fe deficient *** summary,a novel pathway was elucidated,showing that NAS1-dependent translocation of Fe from the root to the shoot is controlled by HAP5A in Fe-deficient Arabidopsis thaliana.

关键词： Arabidopsis translocation expanded

Role of Insulin-like Growth Factor II Receptor in Transdifferentiation of Free Silica-induced Primary Rat Lung Fibroblasts

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Biomedical and Environmental Sciences 2013年第12期26卷 979-985页

作者： HAO Chang Fu LI xiao fang YAO Wu Department of Occupational Health and Occupational Disease College of Public Health Zhengzhou University

Objective To study the role of insulin-like growth factor II receptor in free silica-induced transdifferentiation of primary rat lung fibroblasts Methods Rat lung fibroblasts and rat alveolar macrophages were cultured. A transdifferentiation model of primary rat lung fibroblasts was induced by free silica. Levels of a-SMA protein, IGF-liR protein and mRNA were measured by immunocytochemistry, Western blot and RT-PCR, respectively. Lung fibroblasts were treated with Wortmannin. Results The expression levels of a-SMA concentration and decreased after Wortmann and IGF-IIR increased with the increasing free silica n was used. Conclusion The IGF-IIR plays an important role in free silica-induced transdifferentiation of primary rat lung fibroblasts.

关键词： Transdifferentiation Lung fibroblasts Insulin-like growth factor II receptor Silicosis

Protein Expression in Silica Dust-induced Transdifferentiated Rats Lung Fibroblasts

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Biomedical and Environmental Sciences 2013年第9期26卷 750-758页

作者： HAO Chang Fu LI xiao fang YAO Wu Department of Occupational Health and Environmental Health College of Public HealthZhengzhou University

Objective To analyze the expression of different proteins in free silica-induced transdifferentiated rat lung fibrob^asts. Methods Rat lung fibroblasts and alveolar macrophages were cultured. A transdifferentiation model of rat lung fibroblasts was established. Free silica was used as a stimulator for rat lung fibroblasts. Changes in a-SMA were detected by immunohistochemistry and Western blot, respectively. Protein of lung fibroblasts was extracted and analyzed by two-dimensional electrophoresis （2-DE）. Results Six protein spots were identified by mass spectrometry, including glyceraldehyde 3-phosphate-dehydrogenase, peroxiredoxin 5, heterogeneous nuclear ribonucleoprotein A2, transgelin 2, keratin K6 and vimentin. Conclusion Some proteins are changed in free silica-induced transdifferentiaed rat lung fibroblasts

关键词： Transdifferentiation, Myofibrob^ast Two-dimensional electrophoresis Crystalline silica

Microstructure and Mechanical Properties of C/C-ZrC-SiC Composites Fabricated by Reactive Melt Infiltration with Zr,Si Mixed Powders

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Journal of Materials Science & Technology 2013年第8期29卷 702-710页

作者： Xin Yang Zhean Su Qizhong Huang xiao fang Liyuan Chai School of Metallurgical Science and Engineering Central South University State Key Laboratory of Powder Metallurgy Central South University

To meet the increasing demand for advanced materials capable of operation over 2000 ℃ for future thermal protection systems application, C/C-ZrC-SiC composites were fabricated by reactive melt infiltration （RMI） with Zr, Si mixed powders as raw materials. The structural evolution and formation mechanism of the C/C- ZrC-SiC composites were discussed, and the mechanical property of the as-prepared material was investigated by compression test. The results showed that after the RMI process, a special structure with ZrC-SiC multi-coating as outer layer and ZrC-SiC-PyC ceramics as inner matrix was formed. ZrC and SiC rich areas were formed in the composites and on the coating surface due to the formation of Zr-Si intermetallic compounds in the RMI process. Mechanical tests showed that the average compression strength of the C/C-ZrC-SiC composites was 133.86 MPa, and the carbon fibers in the composites were not seriously damaged after the RMI process.

关键词： Carbon/carbon composites Reactive melt infiltration Coating ZrC SiC

The application of clean production in organic synthesis

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Chinese Chemical Letters 2021年第5期32卷 1637-1644页

作者： Jun Jiang fang xiao Wei-Min He Leyong Wang School of Chemistry and Chemical Engineering University of South ChinaHengyang 421001China Xiangya School of Public Health Central South UniversityChangsha 410078China Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Clean production,as an important part of green chemistry,has received great attention and considerable development in recent *** this perspective article,we summarized some examples of(nearly)quantitative synthesis,clean separation and purification to emphasize clean *** reactions were carried out by using eco-friendly solvents and the pure products could be easily obtained through clean procedures.

关键词： Green chemistry Green solvent Water Solvent free Purification