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Electric transport properties and temperature stability of magnetoresistance of composite system between La_(8/9)Sr_(1/45)Na_(4/45)MnO_3 and Sb_2O_3

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Rare Metals 2013年第4期32卷 363-368页

作者： gui-ying wang Yong-Gang Tang Qi-Xiang Song Ming-Yu Zhang Zhen-Sheng Peng Anhui Key Laboratory of Spintronic and Nano-materials Research School of Mechanical and Electronic Engineering Suzhou University

The samples ofLa8/9Sr1/45Na4/45MnO3 （LSNMO）/x/2（Sb2O3） were prepared by the solid-state reaction method. The electric transport properties and the temperature stabil-ity of magnetoresistance （MR） of the samples were studied through the measurements of X-ray diffraction patterns, resistivity-temperature （ρ-T） curves, mass magnetization-temperature （σ-T） curves, and magnetoresistance-temper-ature （MR-T） curves. The results indicate that the p-Tcurves of the original material LSNMO show two peaks, and the phenomenon of two peaks of ρ-T curves disappears for the composite samples, which can be explained by a competition between surface-phase resistivity induced by boundary-dependent scattering and body-phase resistivity induced by paramagnetism-ferromagnetism transition. For all the sam-ples in the low temperature range, MR increases continu-ously with the decrease of temperature, which shows a characteristic of low-field magnetoresistance. However, MR basically keeps the same in the high temperature range. The paramagnetism-ferromagnetism transition is observed in the high temperature range due to a composite between perov-skite manganite and insulator, which can enhance the tem-perature of MR appearance in the high temperature range and make it to appear near room temperature. For the sample with x = 0.12, MR remains constant at the value of 7.5 % in the temperature range of 300-260 K, which achieves a tem-perature stability of MR near room temperature. In addition,for the sample with x = 0.16, MR is above 6.8 % in the high temperature range of 318-252 K （△T = 66 K）. MR almost remains constant in this temperature range, which favors the practical application of MR.

关键词： Electric transport property Temperaturestability of magnetoresistance Two-phase composite Perovskite manganite

Synthesis of ultralong Si_3N_4 nanowires by a simple thermal evaporation method

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Rare Metals 2013年第2期32卷 186-190页

作者： Wen-Qi wang Xiao-Ping Zou Nan-Jia Zhou Guang Zhu gui-ying wang Zhen-Sheng Peng Anhui Key Laboratory of Spintronics and Nano-materials (Cultivating Base) Suzhou University Research Center for Sensor Technology Beijing Key Laboratory for SensorBeijing Information Science and Technology University Department of Materials Science and Engineering Northwestern University Structure Research Laboratory University of Science and Technology of China

Largescale vaporsolid synthesis of ultralong silicon nitride （Si3N4） nanowires was achieved by using simple thermal evaporation of mixture powders of active carbon and monoxide silicon. The products were charac terized by Xray diffraction, scanning electron microscopy, energydispersive Xray spectroscopy, and transmission electron microscopy. The results suggest that the silicon nitride nanowires have a smooth surface, with lengths of up to several hundreds of microns and diameters of 100300 nm. A detailed study of both the chemical and structural composition was performed. Such ultralong sil icon nitride nanowires demonstrate potential applications as materials for constructing nanoscale devices and as reinforcement in advanced composites.

关键词： Si3N4 nanowires Ultralong Thermal evaporation

New cancer suppressor gene for colorectal adenocarcinoma:Filamin A

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World Journal of Gastroenterology 2015年第7期21卷 2199-2205页

作者： Zi-Qiang Tian Jian-Wei Shi Xiao-Ran wang Zhong Li gui-ying wang Department of Thoracic Surgery Fourth Hospital of Hebei Medical University Department of Surgical Oncology Affiliated Hospital of Hebei University Department of the Second General Surgery Fourth Hospital of Hebei Medical University

AIM:To determine the expression and significance of filamin A(FLNa)in colorectal adenocarcinoma ***:The expression of FLNa in 46 colorectal cancer tissues and normal tissues was detected by immunohistochemistry,reverse transcription polymerase chain reaction(RT-PCR)and Western blotting,and its relationship with clinical parameters and prognosis was ***:The positive expression of FLNa in cancer tissues was lower than that in normal mucosa,and the difference was statistically *** expression of FLNa correlated with liver metastasis,lymph node metastasis and rectal invasion depth,regardless of sex,age,tumor location,tumor size,gross shape and histological type of colorectal *** analysis showed that FLNa was an independent risk factor for postoperative survival of patients with colorectal ***,survival analysis showed that the expression level of FLNa was closely related with survival of patients with colorectal *** results of RT-PCR and Western blotting were consistent with those of ***:FLNa showed low expression in colorectal adenocarcinoma,high correlation with the incidence and development of colorectal cancer,and was considered an indicator of prognosis.

关键词： Colorectal carcinoma Filamin A Immunohistochemistr

White organic light-emitting devices based on fac tris(2-phenylpyridine) iridium sensitized 5,6,11,12-tetraphenylnap-hthacene

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Optoelectronics Letters 2008年第3期4卷 205-208页

作者： DING gui-ying wang Jin JIANG Wen-long wang Jing wang Li-zhong CHANG Xi College of Information Technology Jilin Normal University Siping 136000China

We have fabricated the white organic light-emitting devices （WOLEDs） based on 4,4＇ -bis（2,2 -diphenyl vinyl）-1,1＇ - biphenyl （DPVBi） and phosphorescence sensitized 5,6,11,12,-tetraphenylnaphthacene （rubrene）. The device structure is ITO/2T-NATA （20 nm）/NPBX （20 nm）/CBP： x%Ir（ppy）3：0.5% rubrene （8 nm）/NPBX （5 nm）/DPVBi （30 nm）/Alq（30 nm）/LiF（0.5 nm）/A1. In the devices, DPVBi acts as a blue light-emitting layer, the rubrene is sensitized by a phosphorescent material, fac tris （2-phenylpyridine） iridium [Ir（ppy）3], acts as a yellow light-emitting layer, and N,N＇ -bis- （1-naphthyl）- N,N＇ -diphenyl -1, 1＇ -biphenyl-4,4＇ -diamine （NPBX） acts as a hole transporting and exciton blocker layer, respectively. When the concentration of Ir （PPY）3 is 6wt%, the maximum luminance is 24960 cd/m^2 at an applied voltage of 15 V, and the maximum luminous efficiency is 5.17 cd/A at an applied voltage of 8 V.

关键词：光散射铱元素有机物磷光

Abnormal electric transport property and magnetoresistance stability of La-Sr-K-Mn-O system

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Rare Metals 2013年第3期32卷 258-263页

作者： Yong-Gang Tang gui-ying wang Guo-Qing Yan Qi-Xiang Song Ming-Yu Zhang Zhen-Sheng Peng Cultivating Base of Anhui Key Laboratory of Spintronics and Nano-materials Research School of Mechanical and Electronic Engineering Suzhou University

The perovskite samples La1-x（Sr1-yKy）xMnO3 （y = 0.0, 0.2, 04, 0.6, 0.8） were prepared by the solid-state reaction method with comparatively low sintering tem- perature and with comparatively short sintering time, and the electric transport property and temperature stability of MR of this system were studied. The p-T curves show the abnormal phenomenon that with the increase of K doping amount, resistivity increases, and the insulator-metal transition temperature decreases, which is because the influence of the occupation disorder degree of A-site ions σ2 on the electric transport property of perovskite manga- nites is larger than that of the radius of A-site ions （rA）. In the temperature range below 225 K, MR increases contin- uously with the decrease of temperature, which is the characteristic of low-field magnetoresistance; in the com- paratively wide temperature range near 250 K, the MR- T curves of all the samples are comparatively fiat, and the value of MR almost does not change with temperature, which shows the temperature stability of magnetoresis- tance, and can be explained by the competition between the low-field magnetoresistance induced by spin-dependent tunneling of surface phase and the intrinsic magnetoresis- tance of grain phase. The magnetoresistance value of the sample with y = 0.8 keeps at （7.92 ±0.36） % in the very wide temperature range of 225-275 K, and this is a goodreference for the preparation of this kind of sample with practical application value in the future.

关键词： Keywords Magnetoresistance K doping Disorder degree σ2 Electric transport property

Temperature stability of magnetoresistance (MR) and MR enhancement in La_(1-x)(Sr_(1-y)Ag_y)_x MnO_3 system

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Rare Metals 2013年第1期32卷 81-86页

作者： Yong-Gang Tang gui-ying wang Guo-Qing Yan Qi-Xiang Song Ming-Yu Zhang Zhen-Sheng Peng Cultivating Base of Anhui Key Laboratory of Spintronics and Nano-Materials Research School of Mechanical and Electronic Engineering Suzhou University

Polycrystalline samples of Lal-x（Srl-yAgy）x MnO3 （y = 0.0, 0.2, 0.4, 0.6, 1.0） were prepared by the solid-state reaction method. The temperature stability of magnetoresistance and magnetoresistance enhancement in Lal_x（Srl_yAgy）~MnO3 system with both univalent and bivalent elements doped at A site and with unchanged value of Mn~＋/Mn4＋ ratio were explored through the measurements of X-ray diffraction patterns, magnetiza- tion-temperature （M-T） curves, resistivity-temperature （p-T） curves and magnetoresistance-temperature （MR-T） curves. The results are as follows： there are two peaks in the p-T curves of the samples with Ag doping, one is caused by resistance change during the paramagnetism- ferromagnetism transition, and the other is from boundary- dependent scattering of conduction electrons on the boundaries of grains. The peak value of MR increases with increasing Ag doping content, and it increases from 8.2 % for y ---- 0.2 to 29.6 % for y ---- 1.0 under the magnetic field of B = 0.8 T; MR remains a constant of 12 % in the temperature range of 218-168 K for the sample with y = 1.0, and the temperature stability of MR is in favor of the practical application of MR.

关键词： Ag doping Magnetoresistance enhancement Temperature stability Perovskite manganite

Upregulated lncRNA PRNT promotes progression and oxaliplatin resistance of colorectal cancer cells by regulating HIPK2 transcription

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World Journal of Gastrointestinal Oncology 2024年第4期16卷 1564-1577页

作者： Sai-Nan Li Shan Yang Hao-Qi wang Tian-Li Hui Meng Cheng Xi Zhang Bao-Kun Li gui-ying wang The First Department of Surgery The Fourth Hospital of Hebei Medical UniversityShijiazhuang 050011Hebei ProvinceChina The Second Department of Surgery The Fourth Hospital of Hebei Medical UniversityShijiazhuang 050011Hebei ProvinceChina Department of General Surgery The Second Hospital of Hebei Medical UniversityShijiazhuang 050000Hebei ProvinceChina

BACKGROUND Colorectal cancer(CRC)is the third most common cancer and a significant cause of cancer-related mortality *** to chemotherapy,especially during CRC treatment,leads to reduced effectiveness of drugs and poor patient *** noncoding RNAs(lncRNAs)have been implicated in various pathophysiological processes of tumor cells,including chemotherapy resistance,yet the roles of many lncRNAs in CRC remain *** To identify and analyze the lncRNAs involved in oxaliplatin resistance in CRC and to understand the underlying molecular mechanisms influencing this *** Gene Expression Omnibus datasets GSE42387 and GSE30011 were reanalyzed to identify lncRNAs and mRNAs associated with oxaliplatin *** bioinformatics tools were employed to elucidate molecular *** expression levels of lncRNAs and mRNAs were assessed via quantitative reverse transcription-polymerase chain *** assays,including MTT,wound healing,and Transwell,were conducted to investigate the functional implications of lncRNA *** between lncRNAs and trans-cription factors were examined using RIP and luciferase reporter assays,while Western blotting was used to confirm downstream ***,a xenograft mouse model was utilized to study the in vivo effects of lncRNAs on chemotherapy *** LncRNA prion protein testis specific(PRNT)was found to be upregulated in oxaliplatin-resistant CRC cell lines and negatively correlated with homeodomain interacting protein kinase 2(HIPK2)*** was demonstrated to sponge transcription factor zinc finger protein 184(ZNF184),which in turn could regulate HIPK2 *** expression of PRNT influenced CRC cell sensitivity to oxaliplatin,with overexpression leading to decreased sensitivity and decreased expression reducing *** RIP and luciferase reporter assays indicated that ZNF184 and HIPK2 are targets of *** PRNT/ZNF184

关键词： Colorectal cancer Oxaliplatin resistance Prion protein testis specific Zinc finger protein 184 Homeodomain interacting protein kinase 2

Combination of endoscopic submucosal dissection and laparoscopic sentinel lymph node dissection in early mucinous gastric cancer:Role of lymph node metastasis

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World Journal of Clinical Cases 2020年第16期8卷 3474-3482页

作者： Hua Li Li-Li Zhao Xiao-Chong Zhang Deng-Xiang Liu gui-ying wang Zhi-Bin Huo Shu-Bo Chen Institute of Cancer Control Xingtai People’s HospitalXingtai 054001Hebei ProvinceChina Department of General Surgery Fourth Affiliated Hospital of Hebei Medial UniversityShijiazhuang 050000Hebei ProvinceChina

BACKGROUND Recent evidence showed that combining endoscopic submucosal dissection(ESD)and laparoscopic sentinel lymph node dissection may avoid unnecessary gastrectomy in treating early mucinous gastric cancer(EMGC)patients with risks of positive lymph node metastasis(pLNM).AIM To explore the predictive factors for pLNM in EMGC,and to optimize the clinical application of combing ESD and sentinel lymph node dissection in a proper subgroup of patients with *** Thirty-one patients with EMGC who had undergone gastrectomy with lymph node dissection were consecutively enrolled from January 1988 to December *** and multivariate logistic regression analyses were used to estimate the association between the rates of pLNM and clinicopathological factors,providing odds ratio(OR)with 95%confidence *** the association between the number of predictors and the pLNM rate was also *** Depth of invasion(OR=7.342,1.127-33.256,P=0.039),tumor diameter(OR=9.158,1.348-29.133,P=0.044),and lymphatic vessel involvement(OR=27.749,1.821-33.143,P=0.019)turned out to be significant and might be the independent risk factors for predicating pLNM in the multivariate *** patients with 1,2,and 3 risk factors,the pLNM rates were 9.1%,33.3%,and 75.0%,*** was not detected in seven patients without any of these risk *** ESD might serve as a safe and sufficient treatment for intramucosal EMGC if tumor size≤2 cm,and when lymphatic vessel involvement is absent by postoperative histological *** ESD and sentinel lymph node dissection could be recommended as a safe and effective treatment for EMGC patients with a potential risk of pLNM.

关键词： Endoscopic submucosal dissection Early gastric cancer Mucinous gastric cancer Laparoscopic sentinel lymph node dissection

An organic light-emitting devices of highly efficient white phosphor using an electron/exciton blocker

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Optoelectronics Letters 2008年第1期4卷 26-29页

作者： JIANG Wen-long , DING gui-ying, wang Jin,wang Jing , wang Li-zhong , CHANG Xi,HAN Qiang , wang Hong-mei , and ZHAO Xiao-hong College of information Technology , Jilin Normal University, Siping 136000,China College of information Technology Jilin Normal University Siping China

Highly efficient white phosphorescent organic light-emitting devices (WOLEDs) was fabricated using an electron/exciton blocker. The device structure is ITO/2T-NATA(25 nm)/ NPBX(25-dnm)/CBP:5%Ir(ppy)3:0.5%Rubrene(8 nm)/NPBX(dnm)/ DPVBi(30 nm)/TPBi(20 nm)/Alq(10nm)/LiF(1nm)/Al, in which N,N '-bis- (1-naphthyl)- N,N '-diphenyl -1, 1 '- bi- phenyl-4,4 '-diamine (NPBX) functions as a hole transport layer and electron/exciton blocker, 4,4,N,N '- dicarbazolebiphenyl (CBP) is host, 4,4'-bis(2,2 -diphenyl vinyl)-1,1 '-biphenyl (DPVBi) is blue fluorescent dye, 5,6,11, 12,-tetraphenylnaphthacene (rubrene) is fluorescent dye, factris (2-phenylpyridine) iridium (Ir(ppy)3) is phosphorescent sensitizer and tris(8-hydroxyquinoline) aluminum (Alq3) is an electron transport layer. The WOLEDs have obtained white light emission by adjusting the thickness of NPBX , when the concentration of Ir(ppy)3 is 5-wt% and rubrene is 0.5-wt%, respectively, the thickness of the doped emissive layer is 8 nm, the WOLEDs show a maximum luminous efficiency is 11.2 cd/ A with d of 10 nm at 7 V and a maximum luminance of 28170 cd/m2 at 17 V, the CIE coordinates is (0.***.0.42), which is in white region.

关键词：电子/激子阻断器白磷有机光发射装置制作方法