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SYNTHESIS OF EXFOLIATED ISOTACTIC POLYPROPYLENE/FUNCTIONAL ALKYL-TRIPHENYLPHOSPHONIUM-MODIFIED CLAY NANOCOMPOSITES BY IN SITU POLYMERIZATION

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Chinese Journal of Polymer Science 2013年第11期31卷 1501-1508页

作者： Kai Du 贺爱华 Fu-yong bi Charles C.Han Fine Chemicals Department Beijing Research Institute of Chemical IndustrySINOPEC State Key Laboratory of Polymer Physics and Chemistry Joint Laboratory of Polymer Science and MaterialsBeijing National Laboratory for Molecular ScienceInstitute of ChemistryChinese Academy of Sciences Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-PlasticsSchool of Polymer Science and EngineeringQingdao University of Science and Technology State Key Laboratory of Polymer Physics and Chemistry Joint Laboratory of Polymer Science and MaterialsBeijingNational Laboratory for Molecular ScienceInstitute of ChemistryChinese Academy of Sciences

Diphenyl （4-hydroxyphenyl） hexadecyl phosphonium bromide （POH） -modified montmorillonite （POHMMT） was used to prepare a novel TiC14/MgC12/POHMMT compound catalyst and exfoliated iPP/POHMMT nanocomposites were prepared by the in situ intercalative polymerization of propylene with the TiC14/MgC12/POHMMT compound catalyst. The POH surfactants don＇t change the catalytic characteristic of the Z-N catalyst and the obtained PP presents high isotacticity, normal molecular weight and molecular weight distribution. The WAXD, SAXS and TEM results demonstrate the highly exfoliated iPP/POHMMT nanocomposites were produced by the in situ polymerization with this novel catalyst, while the intercalated iPP/Na＋MMT nanocomposites were produced with the TiC14/MgC12/Na＋MMT compound catalyst. Through this approach, in situ propylene polymerization can actually take place between the silicate layers and lead not only to PP with high isotacticity and molecular weight, but also to highly exfoliated PP nanocomposites.

关键词： Clay Nanocomposites Poly(propylene) (PP) Ziegler-Natta polymerization.

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Anaerobic ammonium oxidation for advanced municipal wastewater treatment: is it feasible?

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Journal of Environmental Sciences 2005年第6期17卷 1022-1024页

作者： LI Jie XIONG bi-yong ZHANG Shu-de YANG Hong ZHANG Jie School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China Key Lab of Water Quality Science and Water Environment Recovery Engineering Beijing University of Technology Beijing 100022 China

Anaerobic ammonium oxidation（ANAMMOX） is a recently developed process to treat ammonia-rich wastewater. There were numerous articles about the new technology with focus on the ammonium-rich wastewater treatment, but few on advanced municipal wastewater treatment. The paper studied the anaerobic ammonium oxidation （ANAMMOX） process with a down flow anoxic biofilter for nitrogen removal from secondary clarifier effluent of municipal wastewater with low COD/N ratio. The results showed that ANAMMOX process is applicable to advanced wastewater treatment with normal temperature as well as ammonia-rich high temperature wastewater treatment. The results indicated that ammonia removal rate was improved by raising the nitrite concentration, and the reaction rate reached a climax at 118.4 mgN/L of the nitrite nitrogen concentration. If the concentration exceeds 118.4 mgN/L, the ANAMMOX process was significantly inhibited although the ANAMMOX bacteria still showed a relatively high reactivity. The data also indicated that the ratio of NO2^- -N：NH4 ＊ -N = 1.3：1 in the influent was appropriate for excellent nitrogen removal. The pH increased gradually along the ANAMMOX biofilter reactor. When the ANAMMOX reaction was ended, the pH was tend to calm. The data suggested that the pH could be used as an indicator to describe the course of ANAMMOX reaction.

关键词： ANAMMOX anoxic biofilter advanced treatment nitrogen removal nitrite

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Rapid hologram generation through backward ray tracing and adaptive-resolution wavefront recording plane

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Chinese Physics B 2024年第11期33卷 291-295页

作者： Jianying Zhu yong bi Minyuan Sun Weinan Gao Applied Laser Research Center Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

An advanced method for rapidly computing holograms of large three-dimensional(3D)objects combines backward ray tracing with adaptive resolution wavefront recording plane(WRP)and adaptive angular spectrum *** the initial phase,a WRP with adjustable resolution and sampling interval based on the object’s size is defined to capture detailed information from large 3D *** second phase employs an adaptive angular spectrum method(ASM)to efficiently compute the propagation from the large-sized WRP to the small-sized computer-generated hologram(CGH).The computation process is accelerated using CUDA and *** experiments confirm that the algorithm can generate high-quality holograms with shadow and occlusion effects at a resolution of 1024×1024 in 29 ms.

关键词： computer-generated hologram(CGH) wavefront recording plane(WRP) backward ray tracing

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Induces Resistance Against Fusarium and Pink Rots by Acibenzolar-S-Methyl in Harvested Muskmelon (***)

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Agricultural Sciences in China 2008年第1期7卷 58-64页

作者： GE yong-hong bi Yang LI Xuan LI Mei College of Food Science and Engineering Gansu Agricultural University Lanzhou 730070 P.R.China

Acibenzolar-S-methyl （ASM） is a chemical activator of systematic resistance in many plants. The effect of preharvest and postharvest application of ASM was evaluated for its ability to induce resistance in muskmelon fruit. The results indicated that 50 and 100 mg L^-1 ASM or 1 mL L^-1 imazalil at 1 week or 1 day before harvest were effective in reducing the lesion area with 100 mg L^-1 ASM the most effective. No treatment inhibited the infection rate. The postharvest results showed that 50 and 100 mg L^-1 ASM, and 0.1 mL L^-1 imazalil were effective in reducing the lesion area with 100 mg L^-1 ASM the most effective. No treatment inhibited the infection rate. There was a clear time-dependent response of the fruit to postharvest ASM treatment, in which treatments applied 1, 3, and 5 day before inoculation provided the best results. ASM did not demonstrate any fungicide effect in vitro and suppressed lesion area in treated muskmelons, indicating that disease resistance was induced. The protection of ASM was associated with the activation of peroxidase （POD） in treated muskmelons.

关键词： acibenzolar-S-methyl (ASM) induced resistance muskmelon peroxidase (POD)

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Fluoroscopic removal of fractured,retained,embedded Z self-expanding metal stent using a guidewire lasso technique:A case report

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World Journal of Clinical Cases 2022年第8期10卷 2516-2521页

作者： yong-Hua bi Jian-Zhuang Ren Jin-Dong Li Xin-Wei Han Department of Interventional Radiology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina Department of Thoracic Surgery The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina

BACKGROUND There are few reports of a fractured esophageal self-expanding metallic stent(SEMS)and the lasso retrieval technique,forming a guidewire loop by directing the guidewire back up the external stent for *** SUMMARY A 74-year-old man complained of dysphagia approximately 6 mo after radical resection of esophageal *** anastomotic stenosis was diagnosed,and a 20 mm in diameter and 60 mm in length esophageal covered SEMS was inserted after repeated balloon *** 13.5 mo after stenting,dysphagia recurred and esophagography showed severe stenosis above the proximal stent and stent removal was ***-third of the stent was removed and the fractured stent remained in the proximal esophagus.A suction tube was introduced through the guidewire and then the guidewire was grabbed,acting like a“lasso”on *** remaining fractured stent was successfully removed by slowly pulling back the guidewire,with no fragments of stent wires *** The guidewire lasso technique is a simple,effective method of removing esophageal SEMS in rare cases of stent fracture.

关键词： Self-expanding metallic stent Stenosis Guidewire lasso technique Stent removal Esophagus Case report

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UVB-irradiated human keratinocytes and interleukin-1■ indirectly increase MAP kinase/AP-1 activation and MMP-1 production in UVA-irradiated dermal fibroblasts

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Chinese Medical Journal 2006年第10期 827-831页

作者： WANG Xiao-yong bi Zhi-gang Department of Dermatology First Affiliated Hospital of NanjingMedical University Nanjing 210029 China

Background Solar ultraviolet （UV） irradiation induces the production of matrix metalloproteinases （MMPs） by activating cellular signalling transduction pathways. MMPs are responsible for the degradation and/or inhibition of synthesis of collagenous extracellular matrix in connective tissues. We mimicked the action of environmental ultraviolet on skin and investigated the effects of UVB-irradiated human keratinocytes HaCaT and IL-1α on mitogen activated protein （MAP） kinase activation, c-Jun and c-Fos （AP- 1 is composed of Jun and Fos proteins） mRNA expression and MMP-1 production in UVA-irradiated dermal fibroblasts.

关键词： ultraviolet keratinocytes fibroblasts interleukin-1α matrix metalloproteinase-1

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Drug coated balloon angioplasty for renal artery stenosis due to Takayasu arteritis: Report of five cases

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World Journal of Clinical Cases 2019年第18期7卷 2888-2893页

作者： yong-Hua bi Jian-Zhuang Ren Meng-Fei Yi Jin-Dong Li Xin-Wei Han Department of Interventional Radiology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina Department of Thoracic Surgery the First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina

BACKGROUND Takayasu arteritis is a rare but intractable chronic disease in young female patients. Percutaneous transluminal angioplasty of the involved renal arteries has been reported;however, few studies have reported the use of drug coated balloon angioplasty in the treatment of Takayasu arteritis. We aimed to demonstrate five young female patients who presented with a history of hypertension due to Takayasu arteritis. CASE SUMMARY From April 2017 to October 2018, five female patients were diagnosed with hypertension due to Takayasu arteritis by computed tomography angiography (CTA) and laboratory tests. Four patients had a complaint of headache with or without dizziness, and one patient showed no symptom. There was no significant family or past history of hypertension or kidney disease, and the physical examinations were almost normal on admission. We performed a treatment by drug coated balloon angioplasty. Blood pressure decreased dramatically in all patients after balloon angioplasty, and the patency of treated renal artery was demonstrated with CTA over 5 months after the angioplasty procedure. CONCLUSION Drug coated balloon angioplasty is safe and effective for renal artery stenosis due to Takayasu arteritis. A prospective study with a larger sample size is necessary to further demonstrate the effectiveness of the treatment.

关键词： Hypertension Renal artery stenosis Takayasu arteritis Balloon angioplasty Case report

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Effects of methylmercury chloride on the brain chromatin structure in rats at various developing stages

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吉林大学学报(医学版) 1997年第3期 4-7页

作者： Li Zhichao,Li yong′an,bi Xiaoying (Department of Toxicology) \ \

妊娠７～１１ｄ的孕鼠，经腹腔连续注入氯化甲基汞（２ｍｇ／ｋｇ体重），采用Ｈｅｗｉｓｈ和Ｂｕｒｇｏｙｎｅ法分离纯化不同发育阶段新生大鼠的脑细胞核，来探讨氯化甲基汞对其脑染色质结构的影响。接触或不接触氯化甲基汞的大鼠脑细... 详细信息

妊娠７～１１ｄ的孕鼠，经腹腔连续注入氯化甲基汞（２ｍｇ／ｋｇ体重），采用Ｈｅｗｉｓｈ和Ｂｕｒｇｏｙｎｅ法分离纯化不同发育阶段新生大鼠的脑细胞核，来探讨氯化甲基汞对其脑染色质结构的影响。接触或不接触氯化甲基汞的大鼠脑细胞核分别经ＤＮａｓｅ１和ＥｃｏＲ１核酸内切酶消化后进行缺口翻译。结果接触氯化甲基汞生后３ｄ的大鼠脑细胞核３Ｈ－ｄＡＭＰ的掺入量明显低于相应未接触氯化甲基汞的对照组（Ｐ＜０．０５）。我们认为氯化甲基汞对大鼠发育过程中脑染色质结构的影响可能与胎、幼鼠对甲基汞神经毒性的易感有密切关系。

关键词： Methylmercury chloride Rat Brain chromatin

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Controlling the light wavefront through a scattering medium based on direct digital frequency synthesis technology

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Chinese Physics B 2021年第1期30卷 283-287页

作者： Yuan Yuan Min-Yuan Sun yong bi Wei-Nan Gao Shuo Zhang Wen-Ping Zhang Center of Applied Laser Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100190China

Phase modulation is a crucial step when the frequency-based wavefront optimization technique is exploited to measure the optical transmission matrix(TM) of a scattering medium. We report a simple but powerful method, direct digital frequency synthesis(DDS) technology to modulate the phase front of the laser and measure the TM. By judiciously modulating the phase front of a He–Ne laser beam, we experimentally generate a high quality focus at any targeted location through a 2 mm thick 120 grit ground glass diffuser, which is commercially used in laser display and laser holographic display for improving brightness uniformity and reducing speckle. The signal to noise ratio(SNR) of the clear round focus is 50 and the size is about 44 μm. Our study will open up new avenues for enhancing light energy delivery to the optical engine in laser TV to lower the power consumption, phase compensation to reduce the speckle noise, and controlling the lasing threshold in random lasers.

关键词： optical transmission matrix direct digital frequency synthesis technology phase modulation wavefront optimization

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Identification of differentially-expressed genes of rice in overlapping responses to bacterial infection by Xanthomonas oryzae *** and nitrogen deficiency

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Journal of Integrative Agriculture 2015年第5期14卷 888-899页

作者： YU Chao CHEN Hua-min TIAN Fang bi yong-mei Rothstein J Steven Leach E Jan HE Chen-yang State Key Laboratory for biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural Sciences Department of Molecular and Cellular biology College of Biological ScienceUniversity of Guelph Department of bioagricultural Sciences and Pest Management Colorado State University

Bacterial blight of rice caused by Xanthomonas oryzae ***（Xoo） is one of high nitrogen（N） responsive *** plants became more disease resistant with decreasing N suggesting that the crosstalk between disease resistance and N utilization pathways might ***,the co-regulatory components in such crosstalk have not been ***,we comparatively analyzed the gene expression profiling of rice under Xoo inoculation,low N treatment,or a combination of both stresses,and identified the differentially-expressed genes（DEGs） in overlapping *** DEGs were involved in different biological processes,including innate immunity and nitrogen *** randomly-selected DEGs expression was validated by quantitative real-time PCR *** expression of six genes from different functional categories suggested that N condition was the dominant factor when both stresses were *** DEGs identified provide novel insights into the coordinated regulatory mechanism in biotic and abiotic stress responses in rice.

关键词： Xanthomonas differentially overlapping abiotic blight responsive crosstalk pathogen encoding validated

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