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| 1 | Gastrointestinal imaging-practical magnetic resonance imaging approach显示文摘Over the past two decades, advances in cross-sectionalimaging such as computed tomography and magneticresonance imaging(MRI) have dramatically changed theconcept of gastrointestinal imaging. MR is playing anincreasing role in the evaluation of gastrointestinal disorders. MRI combines the advantages of excellent soft-tissue contrast, noninvasiveness, functional informationand lack of ionizing radiation. Furthermore, recent developments of MRI have led to improved spatial and temporal resolution as well as decreased motion artifacts. Inthis article we describe the technical aspects of gastroin-testinal MRI and present a practical approach for a well-known spectrum of gastrointestinal disease processes. | Baodong Liu Miguel Ramalho Mamdoh AlObaidy Kiran K Busireddy Ersan Altun Janaka Kalubowila Richard C Semelka | 2014 | World Journal of Radiology2014，6，8： | 11 |
| 2 | Vitamin B complex and vitamin B12 levels after peripheral nerve injury显示文摘The aim of the present study was to evaluate whether tissue levels of vitamin B complex and vitamin B12 were altered after crush-induced peripheral nerve injury in an experimental rat model. A total of 80 male Wistar rats were randomized into one control(n = 8) and six study groups(1, 6, 12, 24 hours, 3, and 7 days after experimental nerve injury; n = 12 for each group). Crush-induced peripheral nerve injury was performed on the sciatic nerves of rats in six study groups. Tissue samples from the sites of peripheral nerve injury were obtained at 1, 6, 12, 24 hours, 3 and 7 days after experimental nerve injury. Enzyme-linked immunosorbent assay results showed that tissue levels of vitamin B complex and vitamin B12 in the injured sciatic nerve were significantly greater at 1 and 12 hours after experimental nerve injury, while they were significantly lower at 7 days than in control group. Tissue level of vitamin B_(12) in the injured sciatic nerve was significantly lower at 1, 6, 12 and 24 hours than in the control group. These results suggest that tissue levels of vitamin B complex and vitamin B_(12) vary with progression of crush-induced peripheral nerve injury, and supplementation of these vitamins in the acute period may be beneficial for acceleration of nerve regeneration. | Idiris Altun Ergül Belge Kurutas | 2016 | Neural Regeneration Research2016，11，5： | 6 |
| 3 | Altered spontaneous contractions of the ileum by anesthetic agents in rats exposed to peritonitis显示文摘AIM:To investigate in vitro effects of propofol,midazolam and dexmedetomidine,which are commonly used anaesthesic or sedatives,on spontaneous contractions of the ileum both in normal rats and those exposed to hyperdynamic peritonitis.METHODS:Spontaneous contractions of isolated ileum muscle segments from sham operated rats and those exposed to peritonitis,were studied in vitro.The amplitude and the frequency of spontaneous contractions of ileum muscle segments were studied after adding dexmetetomidine,propofol,and midazolam to the organ bath in a cumulative manner.RESULTS:Both amplitude(85.2±6.6 vs 47.4±7.1)and frequency(32.8±4.6 vs 20.2±3.9)of spontaneous contractions in ileum smooth muscle segments were decreased significantly in the peritonitis group compared to the control group(P<0.05).Dexmedetomidine significantly increased the amplitude of spontaneous contractions(85.2±6.6 vs 152.0±5.4,P<0.05)whereas,propofol(85.2±6.6 vs 49.6±4.8,P<0.05)and midazolam(85.2±6.6 vs 39.2±4.5,P<0.05)decreased it in both control and peritonitis groups.The frequency of spontaneous contractions were significantly decreased by propofol in both control(32.8±4.6 vs 18.2±3.4,P<0.05)and peritonitis groups 20.2±3.9 vs 11.6±3.2,P<0.05).Dexmedetomidine and midazolam did not cause significant changes in the number of spontaneous contractions in both control and the peritonitis groups(P>0.05).CONCLUSION:Propofol,midazolam and dexmedetomidine have various in vitro effects on spontaneous contractions of the rat ileum.While dexmedetomidine augments the spontaneous contraction of the rat ileum,propofol attenuates it.However,the effects of these compounds were parallel in both control and peritonitis groups. | Cengiz Aydin Ihsan Bagcivan Sinan Gursoy Ahmet Altun Omer Topcu Ayhan Koyuncu | 2009 | World Journal of Gastroenterology2009，15，13： | 6 |
| 4 | 含碳酸钙的海泡石钻井液的封堵性能显示文摘通过室内实验和理论分析,研究了不同温度、压力条件下添加碳酸钙前后海泡石水基钻井液对不同渗透性地层的封堵性能,论证将碳酸钙作为堵漏剂添加到海泡石钻井液中的可行性。在实验温度为27~204℃、实验压力为2 070 kPa和6 895 kPa条件下进行流变性和滤失性测试,结果表明,除了在149℃时,其他各温度下海泡石钻井液流变性质较好、悬固能力较强,高温高压滤失量较低。孔隙堵塞器(PPA)实验中用孔径10~90μm的渗透性陶瓷盘模拟地层,实验结果表明,不含碳酸钙的海泡石钻井液不能封堵孔隙,而含碳酸钙的海泡石钻井液可在较短时间内封堵孔隙,且在高温下也能保持碳酸钙颗粒悬浮,使用温度可高达193℃。扫描电镜分析及理想充填理论分析结果验证了PPA实验结果。 | ETTEHADI Ali ALTUN Gursat | 2017 | 石油勘探与开发2017，44，3： | 6 |
| 5 | 热解炭去除污水中Cr(Ⅵ)(英文)显示文摘以胡桃壳在450℃裂解得到生物质炭BC450,以胡桃壳与20%沥青砂在450℃裂解得到BCTS20,与商业活性炭(CAC)进行对比研究去除污水中Cr(Ⅵ)的能力。与BC450相比,BCTS20具有更丰富的表面官能团。在适当条件下,BC450、BCTS20、CAC对Cr(Ⅵ)的去除率分别为80.47%、90.01%、95.69%。采用Langmuir、Freundlich、D-R模型研究吸附等温线,其中Langmuir模型最佳。BC450、BCTS20、CAC的最大Langmuir吸附容量分别为36.55、49.76、51.94 mg/g。这些炭材料对Cr(Ⅵ)的吸附可能归因于由离子交换、静电作用与螯合作用引起的化学过程。 | Türkan Altun Yakup Kar | 2016 | 新型炭材料2016，31，5： | 5 |
| 6 | Strength properties of xanthan gum and guar gum treated kaolin at different water contents显示文摘Nowadays,using biopolymer as a ground improvement method has become very popular.However,since biopolymers are organic and degradable,their long-term effect is not fully known.In this study,the effects of biopolymers on the mechanical behavior of kaolin clay were investigated through a comprehensive program of experiments.Two types of biopolymer,i.e.xanthan gum and guar gum were chosen to investigate the effect of biopolymer type.For this purpose,specimens were prepared using standard Proctor energy at four different water contents(25%,30%35%and 40%)with 0.5%,1%,1.5%and 2%biopolymer inclusions.The specimens were cured for 1 d,7 d,28 d and 90 d.Moreover,some of the specimens were kept in the curing room for 3 years to observe the long-term effect of the biopolymers.At the end of the curing periods,the specimens were subjected to unconfined compression test,and scanning electron microscopy(SEM)analysis was performed to observe the mechanism of strength improvement.The results revealed that the unconfined compressive strength(UCS)of the specimens treated with biopolymers increased in all biopolymer inclusion levels and water contents up to a 90-d curing period.For specimens containing xanthan gum,the maximum strength increase was observed at 25%water content and 2%xanthan gum with 90-d curing.The strength increased 5.23 times induced by xanthan gum addition when compared to the pure clay.Moreover,the increase in strength reached 8.53 times in specimens treated with guar gum.Besides,increasing water content caused more ductile behavior,thus increasing the axial deformation. | Irem Bozyigit Akbar Javadi Selim Altun | 2021 | Journal of Rock Mechanics and Geotechnical Engineering2021，13，5： | 4 |
| 7 | Effects of tyrosine kinase inhibitor E7080 and eNOS inhibitor L-NIO on colorectal cancer alone and in combination显示文摘Objective:To investigate the effects of E7080 and N5-(1-iminoethyl)-L-ornithine dihydrochloride(L-NIO)on colorectal cancer alone and in combination.Methods:HT29 colorectal cancer cell line from Sap Institute was used.Real-time cell analysis(xCELLigence system)was performed to determine the effects of E7080 and L-NIO on colorectal cell proliferation.While apoptosis was determined with Annexin V staining,and the effect of agents on angiogenesis was determined with chorioallantoic membrane(CAM)model.Results:We found that E7080 has a strong antiproliferative effect with an half maximum inhibition of concentration(IC50)value of 5.60×10–8mol/L.Also it has been observed that E7080 showed antiangiogenic and apoptotic effects on HT29 colorectal cancer cells.Antiangiogenic scores of E7080 were 1.2,1.0 and 0.6for 100,10 and 1 nmol/L E7080 concentrations,respectively.Furthermore,apoptosis has been detected in71%of HT29 colorectal cancer cells after administration of 100 nmol/L E7080 which may indicate strong apoptotic effect.Meanwhile administration of L-NIO alone did not show any effect,but the combination of E7080 with L-NIO increased the antiproliferative,antiangiogenic and apoptotic effects of E7080.Conclusions:Results of this study indicate that E7080 may be a good choice in treatment of colorectal tumors.Furthermore the increased effects of E7080 when combined with L-NIO raise the possibility to use a lower dose of E7080 and therefore avoid/minimize the side effects observed with E7080. | Ahmet Altun Tijen Kaya Temiz Ezgi Balc Zübeyde Ak n Polat Mustafa Turan | 2013 | Chinese Journal of Cancer Research2013，25，5： | 4 |
| 8 | Patients with Inflammatory Bowel Disease Have a Lower Response Rate to HBV Vaccination Compared to Controls显示文摘 | Mustafa Erhan Altun?z Ebubekir ?enate? Atakan Ye?il Turan ?alhan Ay?e Oya Kurda? ?vün? | 2012 | Digestive Diseases and Sciences2012，，4： | 3 |
| 9 | 中外高校暑期课程的对比及对国际化课程的启示显示文摘暑期国际化课程是适应高等教育国际化要求的一种创新性教学形式,旨在整合教育资源,以提升本科人才培养质量为目标,实现与国际教学资源的对接和交流、拓展本科生的国际视野,感受不同的教育文化和教学模式。以东北大学暑期国际化课程“Introduction to Mineral Processing”为例,以点带面,对暑期国际化课程的时间设置、内容设置、培养目标、考核方式、课程收费情况进行介绍,并与国外几所一流大学的暑期课程进行对比分析。对如何整合学校特色、提高暑期国际化课程的教学质量,充分发挥其在人才培养中的作用,提出几点启示。 | 李丽匣 卢冀伟 孟庆有 袁致涛 单敬淳 Naci Emre Altun | 2019 | 高教学刊2019，0，26： | 3 |
| 10 | Precontoured buttress plate vs reconstruction plate for acetabulum posterior wall fractures: A biomechanical study显示文摘BACKGROUND The purpose of open reduction and internal fixation of acetabulum posterior wall fractures is to restore anatomical structure and stability of the hip joint, in order to start weight bearing as soon as possible and prevent hip arthrosis; restoration of the anatomy should preserve function of the joint as well. Although 'special shaped precontoured plates' have been developed in recent years for surgical treatment of this region, studies comparing the traditional plates with the newly designed precontoured plates are lacking.AIM To evaluate the biomechanical properties of precontoured anatomic buttress and conventional curved reconstruction plates(CCRPs) for posterior wall acetabulum fracture treatment.METHODS Twelve pelvis models were created for testing plate treatment of fracture in the posterior wall of the acetabulum. These 12 pelvis models were used to create 24 hemipelvis models(experimental) by cutting from the sagittal plane and passing over the center of gravity, after which the posterior wall acetabular fractures(of similar type and size) were created. In these experimental models, the right acetabulum was fixed with a 5-hole CCRP, while the left was fixed with a precontoured anatomic buttress plate(PABP). Samples were placed through thetest device and were subjected to static load testing, with a constant testing velocity of 2 mm/min until the load reached 2.3 kN or the acetabular fixation failed. Dynamic tests were also performed with sinusoidal wave load, with a maximal load of 2.3 kN and a load ratio of 0.1.RESULTS The average stiffness values were 460.83 ± 95.47 N/mm for the PABP and 291.99± 118.58 N/mm for the 5-hole CCRP. The precontoured anatomic acetabulum buttress plates had significantly higher rigidity than the CCRPs(P = 0.022). There was a statistically significant difference between the unloaded and 2.3 kN-loaded values of AL(posterosuperior fracture line vertical to the ground surface) and CL(posteroinferior fracture line vertical to the ground surface) parameters for both the PABPs and the 5-hole CCRPs(P = 0.036 and P = 0.045, respectively).According to the static tests, the amount of total displacement was significantly less in the PABPs than in the CCRPs. Comparative analysis of the displacement in the BL(posterior wall fracture line horizontal to the ground) parameter yielded no statistically significant differences between the PABP and the 5-hole CCRPs(P= 0.261).CONCLUSION PABP provides more stable fixation in acetabulum posterior wall fractures than5-hole CCRP, allowing for proximal or distal fracture line screw application without reshaping. | Güray Altun Gürsel Saka Teyfik Demir Fatma Kübra Erbay Elibol Mehmet Or?un Polat | 2019 | World Journal of Orthopedics2019，10，5： | 3 |
| 11 | Analysis of serum antibody profile against H pylori VacA and CagA antigens in Turkish patients with duodenal ulcer显示文摘AIM: To investigate the frequency of seropositivity aga- inst CagA, VacA proteins and to determine their indepen- dent effects on the development of duodenal ulcer (DU) in Turkish patients. METHODS: The study was designed as a prospective one from a tertiary referral hospital. Dyspeptic patients who were referred to our endoscopy unit for upper gas- trointestinal endoscopy between June 2003 and March 2004 and diagnosed to have DU or nonulcer dyspepsia (NUD) were included. Biopsies from the antrum and body of the stomach were taken in order to assess the current H pylori status by histology, rapid urease test and culture. Fasting sera were obtained from all patients and H pylori status of all sera was determined by IgG antibo- dies using an enzyme-linked immunosorbent assay (ELI- SA) kit. All seropositive patients were further analysed using Western blot assays detecting IgG antibodies aga- inst CagA and VacA proteins. The χ2 test was used for statistical comparison of the values and age-sex adjusted multiple regression analysis was used to determine the independent effects of CagA and VacA seropositivities on the development of DU. RESULTS: Sixty-three patients with DU and 62 patients with NUD were eligible for the final analysis. Seropositi- vity for anti-CagA was detected in 51 of 62 (82%), andin 55 of 63 (87%) patients with NUD and DU, respec- tively (p = no significance), and seropositivity for anti- VacA was found in 25 of 62 (40% ) and in 16 of 63 (25%) patients, with NUD and DU, respectively. CONCLUSION: These findings suggest that none of the- se virulence factors is associated with the development of DU in the studied Turkish patients with dyspepsia. | Yusuf Erzin Sibel Altun Ahmet Dobrucali Mustafa Aslan Sibel Erdamar Ahmet Dirican Murat Tuncer Bekir Kocazeybek | 2006 | World Journal of Gastroenterology2006，12，42： | 3 |
| 12 | Food impaction in older age:Think about an eosinophilic esophagitis显示文摘Eosinophilic esophagitis is an inflammatory condition of esophagus.It is generally seen in childhood and young population.Men are more commonly affected than women.However,it is not common in an advanced age.Eosinophilic esophagitis decreases the ability of the esophagus to stretch and accommodation against foods.Therefore,the major symptom in adults with eosinophilic esophagitis is difficulty in swallowing solid food(dysphagia).Specifically,the food gets stuck in the esophagus after it is swallowed.Less common symptoms include heartburn and chest pain.Because of this,it may be incorrectly diagnosed as a gastroesophageal reflux disease.Here,we reported a case presented with food impaction at advanced age.As a conclusion,eosinophilic esophagitis is a rare entity that must be remembered in advance aged patients presenting with food impaction. | Umit Akyüz Filiz Akyüz Kamil zdil Hasan Altun Ahmet Faruk Agan Aysegül Agan | 2013 | World Journal of Gastrointestinal Endoscopy2013，5，2： | 2 |
| 13 | The effect of PVD coatings on the wear behaviour of magnesium alloys显示文摘 | ALTUN H SEN S | 2007 | Materials Character2007，58，10： | 1 |
| 14 | Potential evolution of Turkish agricultural residues as bio-gas, bio-char and bio-oil sources显示文摘 | DEMIRBAS A PEHLIVAN E ALTUN T | 2006 | International Journal of Hydrogen Energy2006，31，： | 1 |
| 15 | Effect of CaF2 and MgO on sintering of cement clinker显示文摘 | ALTUN I | 1999 | Cem Concr Res1999，29，11： | 1 |
| 16 | A case of acute pancreatitis in a patient with systemic lupus erythematosus显示文摘 | Altun H Hamatoglu E | 2005 | Acta Chir Belg2005，105，： | 1 |
| 17 | , Locally advanced nasopharyngeal carcinoma: computed tomography findings, clinical evaluation, and treatment outcome显示文摘 | Musa Altun Nuri Tenekeci Esra Kaytan | 2000 | Int J Radiat Oncol Biol Phys2000，47，2： | 1 |
| 18 | Effect of Post-Oxidizing on Tribological and Corrosion Behaviour of Plasma Nitrided AISI 5140 Steel显示文摘 | Akgun Alsaran Hikmet Altun Mehmet Karakan | 2004 | Surface and Coatings Technology2004，176，： | 1 |
| 19 | Serum levels of MMP-9 and TIMP-1 in primary hypertension and effect of antihy- pertensive treatment显示文摘 | Onal IK Altun B Onal | 2009 | Eur J Intern Med2009，20，4： | 1 |
| 20 | Nasopharyngeal cancer:epidemiology,staging,and treatment显示文摘 | Fandi A Altun M Azli N | 1994 | Seminars in Oncology1994，21，3： | 1 |
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