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Effect of Aging on Hardening Behavior of 15-5 PH Stainless Steel

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Journal of Iron and Steel Research International 2015年第7期22卷 607-614页

作者： Xin-yuan PENG Xian-liang ZHOU Xiao-zhen hua Zhen-wei WEI hua-ying liu School of Materials Science and Technology Nanjing University of Aeronautics and Astronautics School of Materials Science and Engineering Nanchang Hangkong University Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province

Microstructure transformation and aging hardening behavior of 15-5 PH stainless steel were studied by optical microscopy （OM）, X-ray diffraction （XRD） and transmission electron microscopy （TEM）. The results showed that the 15-5 PH stainless steel consists of NbC precipitates and lath matensite with a high dislocation density after solution treatment. With increasing aging temperature and aging time, the martensitic laths were resolved gradually. Meanwhile, the nanometric-sized Cu precipitates gradually coarsened and lost their coherency with＇the martensite matrix, which exhibited an elliptical shape finally. Fine Cu precipitates can lead to significant dispersion hardening effect, while the coarsened Cu precipitates have no contribution to strengthening. The reversed austenite was observed in the speci- mens aged at 550 ℃ and above; moreover, the amount of reversed austenite increased as aging temperature in- creased. The precipitation hardening behavior of 15-5 PH stainless steel may depend on the balance between the softening caused by the formation of reversed austenite and the hardening caused by the precipitation of copper.

关键词： 15-5 PH stainless steel Cu precipitate reversed austenite aging hardening behavior

Perianorectal abscesses and fistula due to ingested jujube pit in infant:Two case reports

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World Journal of Clinical Cases 2020年第20期8卷 4930-4937页

作者： ying-hua liu Zhi-Bao Lv Jiang-Bin liu Qing-Feng Sheng Department of General Surgery Children’s Hospital of ShanghaiShanghai Jiao Tong UniversityShanghai 200333China

BACKGROUND About 90%of perianal infection is caused by cryptoglandular *** a few cases of peritonitis or intra-abdominal abscesses secondary to perforation of the digestive tract by an ingested foreign body have been *** most common sites of impaction and perforation include the appendix,cecum and the terminal *** rectum is an unusual site of foreign body *** report intends to highlight that ingested foreign body impacted in the rectum is an extremely rare cause of perianal abscess and subsequent fistula in *** SUMMARY Two cases of perianal abscess and fistula due to ingested jujube pit impacted in the rectum are *** cases are infants with free previous medical history suffered from recurrent perianal *** caregivers of the two patients denied ingestion of a foreign body or any history of *** examination combined with ultrasound or computed tomography scan established the *** of the patients underwent operation under general *** case 1,a jujube pit with sharp ends was discovered embedded within a subcutaneous *** jujube pit was then removed intact along with fistula *** wound was successfully laid open to allow healing by secondary *** case 2,a jujube pit was found with its sharp end puncturing the rectum,surrounded by pus and necrotic *** incision and adequate drainage were *** whole jujube pit was then removed from the abscess cavity at the same *** patients received colonoscopy to rule out inflammatory bowel disease or other potential damages by the ingested jujube *** postoperative period was *** 1.5 year follow-up,no recurrent abscess or fistula were found in either *** An impacted foreign body must not be overlooked as an unusual cause of perianal abscess and fistula,especially in young children.

关键词： Perianal abscess Perianal fistula Nuts Foreign bodies Infant Case report

Identification and Characterization of Lysobacter enzymogenes as a Biological Control Agent Against Some Fungal Pathogens

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Agricultural Sciences in China 2009年第1期8卷 68-75页

作者： QIAN Guo-liang HU Bai-shi JIANG ying-hua liu Feng-quan Department of Plant Pathology College of Plant Protection Nanjing Agricultural University~Key Laboratory of Monitoring and Managementof Crop Diseases and Pest Insects Ministry of Agriculture Nanjing 210095 P.R.China

Strain OH11, a Gram-negative, nonspore forming, rod-shaped bacterium with powerful antagonistic activity, was isolated from rhizosphere of green pepper in Jiangsu Academy of Agricultural Sciences of China and characterized to determine its taxonomic position. 16S rRNA gene sequence analysis revealed that strain OH11 belongs to the Gammaproteobacteria and had the highest degree of sequence similarity to Lysobacter enzymogenes strain C3 （AY074793）（99%）, Lysobacter enzymogenes strain N4-7 （U89965）（99%）, Lysobacter antibioticus strain （AB019582）（97%）, and Lysobacter gummosus strain （AB16136）（97%）. Chemotaxonomic data revealed that strain OHI 1 possesses a quinine system with Q-8 as the predominant compound and C15：0 iso, C17：1 iso ω9c as the predominant iso-branched fatty acids, all of which corroborated the assignment of strain OH11 to the genus Lysobacter. Results of DNA-DNA hybridization and physiological and biochemical tests clearly showed that strain OH11 was classified as Lysobacter enzymogenes. Strain OH11 could produce protease, chitinase, and β-1,3-glucanase. It showed strong in vitro antifungal activity against Rhizoctonia solani, Sclerotinia scletotiorum, and several other phytopathogenic fungi. This is the first report of identification and characterization of Lysobacter enzymogenes as a biological control agent of plant diseases in China.

关键词： Lysobacter enzymogenes identification characterization biological control

Pancharatnam Phase of a Mesoscopic Coupled Circuit

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Communications in Theoretical Physics 2005年第3X期44卷 555-558页

作者： JI ying-hua liu Qing LUO Hai-Mei HU Ju-Ju Department of Physics Jiangxi Normal University Nanchang 330027 China

We derive a formula of the nonadiabatic noncyclic Pancharatnam phase for a mesoscopic circuit with coupled inductors and capacitors. It shows that, because of coupling effect, the circuit is in squeezed quantum state initially, and the time evolution of Pancharatnam phase exhibits an oscillation in a complex way. Especially we find that when the capacity of the coupled capacitors is larger than that of other ones in the circuit, with the variation of time Pancharatnam phase becomes nearly periodic square-wave, which perhaps can provide a new approach for the realization of quantum logic gate.

关键词： mesoscopic coupled circuits Pancharatnam phase oscillation

H-Bonding Self-assembled Template-directed Synthesis of a Reactive Amide-bridged Ladder Polyvinylsiloxane

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Chinese Chemical Letters 2006年第10期17卷 1361-1364页

作者： You Zhi WAN ying hua liu Ping XIE Rong Ben ZHANG Department of Applied Chemistry School of Science Beijing University of Chemical Technology Beijing 100029 State Key Laboratory of Polymer Physics and Chemistry Joint Laboratory of Polymer Science and Materials Institute of Chemistry Chinese Academy of Sciences Beijing 100080

A novel, reactive amide-bridged ladder polyvinylsiloxane （abbr. LP） with Mn= 2.4×10^4 was synthesized for the first time by means of aryl amide H-bonding self-assembled template. The regularity of LP was characterized by the XRD, ^29Si NMR and DSC methods. XRD analysis demonstrated the ladder width w = 9.09A and the ladder thickness t = 3.89A, respectively, which are approximately consistent with the molecular simulation-calculated ones： w＇= 10.60A and t＇= 3.06A. ^29Si NMR displayed a resonance peak with small half peak width, △1/2 - 4 ppm, for the moiety [=Si（Vi）O2/2-]n of LP. Besides, as a collateral evidence, DSC measurement revealed a high glass transition temperature Tg = 225℃, suggesting high stiffness of the ladder main chain of LP.

关键词： Ladder polyvinylsiloxane stepwise coupling polymerization amido H-bonding interaction.

Shoot multiplication of Syringa reticulata *** from in vitro cultured seedlings

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Journal of Forestry Research 2017年第1期28卷 41-46页

作者： Chun-ping liu hua-ying liu Bo-wen Yang Ling Yang Peng Zhang Hai-long Shen School of Forestry Northeast Forestry UniversityHarbin 150040China State Key Laboratory of Forest Genetics and Breeding Northeast Forestry UniversityHarbin 150040China Academic Journal Publishing Division Higher Education PressBeijing 100029China College of Landscape Architecture Northeast Forestry UniversityHarbin 150040China

We developed a shoot multiplication protocol for Syringa reticulata Blume vat. mandshurica Hara from in vitro cultured seedlings that derived from in vitro germinated seeds. The shoots could be induced on Murashige and Skoog （MS） medium with proper plant growth regulator combinations of 6-benzylaminopurine （BA） and indole-3-butyric acid （IBA）. The better medium for shoot multiplication and growth was MS ＋ 5 mg L-1 BA ＋ 0.5 mg L-1 IBA ＋ 20 g L-1 sucrose ＋ 7 g L-1 agar, and the corresponding shoot induction rate was 75 %. The plantlets grew well after rooting on I/2MS medium （macro-elements of MS medium are at half-strength） sup- plemented with 1 mg L-1 IBA, and the survival percentage was 〉80 % at 16 weeks after transplanting.

关键词： Manchurian lilac Micropropagation Plantgrowth regulator Shoot multiplication Sucroseconcentration

A new fluorescence probing strategy for the detection of parathion-methyl based on N-doped carbon dots and methyl parathion hydrolase

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Chinese Chemical Letters 2017年第8期28卷 1675-1680页

作者： Wei Song Hai-Juan Zhang ying-hua liu Cui-Ling Ren Hong-Li Chen College of Chemistry and Chemical Engineering Lanzhou UniversityLanzhou 730000China Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province Lanzhou 730000China Lanzhou Institute of Chemical Physics Chinese Academy of SciencesLanzhou 730000China

A new facile fluorescence probing strategy, which was based on N-doped carbon dots（NCDs） and methyl parathion hydrolase（MPH）, was developed for the determination of parathion-methyl（PM）. The fluorescence intensity of NCDs-MPH system was proportional to PM concentration in the range of 2.38–73.78 mmol/L, with a detection limit of 0.338 mmol/L. Moreover, the present simple and facile method could be used to determine methyl parathion in environmental and agricultural samples ***, the detection mechanism of this system is inner filter effect and molecular interactions between NCDs and p-nitrophenol, which is the hydrolysis product of PM catalyzed by methyl parathion hydrolase.

关键词： N-doped carbon dots Parathion-methyl Methyl parathion hydrolase Inner filter effect Fluorescence

Metformin for adolescents with polycystic ovary syndrome

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Journal of Reproduction and Contraception 2015年第2期26卷 103-111页

作者： ying-hua liu Li-hui HOU Yan LI Ming liu Fang XU ying WANG Heilongjiang University of Chinese Medicine Gynecologial Clinic of the First Affiliated Hospital Heilongjiang University of Chinese Medicine

Polycystic ovary syndrome （PCOS） is a common endocrine disorder in women of reproductive age characterized by chronic anovulation, hyperhandrogenism, and is increasingly recognized as a disease developed in adolescent period. The management of adolescents with PCOS is a difficult challenge. The objective of the review was to provide an overview on the effects of metformin for adolescents with PCOS.

关键词： polycystic ovary syndrome (PCOS) metformin adolescents

Synthesis and Biological Activity of Novel 2,3-Dihydro-2-phenylsulfonylhydrazono-3-(2′,3′,4′,6′-tetra-O-acetyl-β-D-glucopyranosyl)thiazoles

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Chemical Research in Chinese Universities 2009年第1期25卷 52-55页

作者： WANG Hao-an LI Yu-xin LI Zheng-ming CHENG Hai-ying WANG Su-hua liu Bin Elemento-Organic Chemistry Institute State Key Laboratory of Elemento-Organic Chemistry National Pesticide Engineering Research Center Nankai University Tianjin 300071 P. R. China

A series of novel 2,3-dihydro-2-phenylsulfonylhydrazono-3-（2＇,3＇,4＇,6＇-tetra-O-acetyl-β-D-glucopyranosyl）thiazoles were designed and synthesized via the reaction of thiosemicarbazide with chloroaldehyde. Their chemical structures were characterized by ^1H and ^13C NMR spectroscopy and elemental analysis. The bioassay results indicate that some of these compounds exhibit moderate fungicidal and herbicidal activities.

关键词： Synthesis 2,3-Dihydrothiazole Biological activity