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矿产综合利用 1986年第4期 93-98页

作者： v·P·petrov 汪镜亮

非金属组原料是划分为两个大组——燃料矿物和金属矿石后,作为“剩余”部分而出现的。当然,这两个大组和非金属组要清楚区分开是非常困难的。例如,琥珀、沥青岩或矿物石蜡是燃料矿物,而同时也可将它们视作典型的非金属原料。钛矿石在... 详细信息

非金属组原料是划分为两个大组——燃料矿物和金属矿石后,作为“剩余”部分而出现的。当然,这两个大组和非金属组要清楚区分开是非常困难的。例如,琥珀、沥青岩或矿物石蜡是燃料矿物,而同时也可将它们视作典型的非金属原料。钛矿石在较小程度上

关键词：沥青岩金属矿石粘土类层状硅酸盐矿物对原料工业工业矿物矿床形成铝土矿资源碳酸盐岩

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空气-等离子镀覆技术的进展

热处理 2014年第1期29卷 8-14页

作者： В.Я.Фролов Г.К.Петров Б.А.Юшин Д.В.Иванов СПбГПУ г.Санкт-Петербург

空气-等离子喷涂工艺在许多领域得到了应用。近年来,国立圣彼得堡综合技术大学在等离子体发生器的创建和涂覆工艺方面进行了研究,业已研制成多种涂层,既可用于新制零件的防护,也可用于磨损件的修复。国立圣彼得堡综合技术大学和雷波尼茨... 详细信息

空气-等离子喷涂工艺在许多领域得到了应用。近年来,国立圣彼得堡综合技术大学在等离子体发生器的创建和涂覆工艺方面进行了研究,业已研制成多种涂层,既可用于新制零件的防护,也可用于磨损件的修复。国立圣彼得堡综合技术大学和雷波尼茨(INP greifswald)等离子体及工艺研究院联合进行的理论和试验研究,可显著减少研发等离子体发生器和空气-等离子涂覆工艺的试验工作量。

关键词：空气-电弧涂覆电弧等离子体发生器耐磨涂层修复涂层耐蚀涂层绝热涂层绝缘涂层保护-装饰涂层

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Imaging investigation of pancreatic cystic lesions and proposal for therapeutic guidelines

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World Journal of Radiology 2012年第8期4卷 372-378页

作者： Atanas D Hilendarov georgi petrov Deenichin Kichka georgieva velkova Department of Diagnostic Imaging Medical University Faculty of Medicne4001 PlovdivBulgaria Department of Sergery III Medical University66 Pestersko Shose str.Plovdiv 4001Bulgaria Department of Diagnostic Imaging Medical UniversityPlovdiv 4001Bulgaria

AIM:To propose a diagnostic algorithm for preoperatively predicting the need for surgical ***:The study included 56 patients(27 men and 29 women) with a final diagnosis of cystic pancreatic *** following materials were used:ultrasonic equipment with 3.5 and 7 MHz linear,convex and biopsical *** computed tomography(MDCT) investigations were performed using a 16-slice *** were obtained following the oral administration of 200 mL water and 100 mL intravenous iopamidol(300 mg/mL) administered by pump injector at a rate of 3 mL/s(40 and 60 s post-injection,respectively) using 0.5 mm detectors,reconstructed at 1 mm(pancreatic phase) or 2 mm(portal venous phase) *** table feed was 10 mm per *** were acquired in the pancreatic and portal venous phases of contrast *** 'Chiba' needles 18,20,22,23 g and an automatic aspiration system were used in conjunction with the followingmethods of guiding the interventional procedures:(1) 'free-hand' biopsy and puncture method under ultrasound(US) or computed tomography(CT) control;(2) guiding method using biopsical ***:All 56 patients in this study underwent at least two cuts imaging survey methods,such as US,CT or magnetic resonance imaging(MRI).The most common preoperative diagnostic examination was US scan-56 patients(100%).MDCT studies were conducted in 49(87.50%) and MRI in 13(23.21%).More than half of patients surveyed(37) underwent some type of interventional procedure:25-fine-needle aspiration and 29-fine needle aspiration biopsy(FNAB),as part of the ***-four patients of all 56 patients underwent surgery because of histological evidence of malignancy after the FNAB for cystic lesions of the *** pancreatectomy with splenectomy was the most common operative approach in 13 patients,followed by Whipple resection in 11 and distal pancreatectomy without splenectomy in *** patients were treated with

关键词： Pancreatic cystic neoplasm Diagnostic intervention Fine-needle biopsy

Immunohistochemical Expression of Ki-67, PCNA, pRb, p16, p53, Bcl-2 and Bax in Esophageal Adenocarcinoma and Barrett’s Associated Dysplasia

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Journal of Cancer Therapy 2012年第6期3卷 1092-1110页

作者： Andrey Iskrenov Kotzev Margarita Angelova Kamenova Alexander petrov Tcherveniakov Department of Clinical Pathology “Pirogov” University Hospital Sofia Bulgaria Department of gastroenterology University Hospital “Alexandrovska” Sofia Bulgaria First Surgical Clinic “Pirogov” University Hospital Sofia Bulgaria.

Background: Esophageal adenocarcinoma (EAC) has an extremely poor prognosis. There is a need to characterize the molecular alterations in the carcinogenesis of EAC in order to improve the diagnosis and treatment. Materials and Methods: We used 7 markers to explore the changes in the cell cycle, proliferation and apoptosis in patients with EAC and Barrett’s esophagus (BE)-associated dysplasia. The protein expression of Ki-67, PCNA, pRb, p16, p53, Bcl-2 and Bax was evaluated by immunohistochemistry in archival tissue samples, collected from 15 patients with EAC and 5 patients with BE-associated dysplasia. We analyzed also lymph-node, omentum and liver metastases from the primary esophageal tumors. Results: Ki-67, PCNA, pRb, p16, p53, Bcl-2 and Bax expression was observed in 100%, 87%, 60%, 40%, 100%, 7% and 93% of tumor samples, and in 100%, 80%, 0%, 80%, 80%, 20% and 100% of dysplasia samples, respectively. Significant difference in the expression of the markers between EAC and BE-associated dysplasia was detected for pRb (p = 0.006). Ki-67 expression was associated with clinicopathological parameter T (p = 0.012;v = 0.585). Ninefold higher risk to develop EAC was established for the patient with strong p53 expression, than the lacking p53 patient. Patients with strong p53 expression survived 6.8 months longer than the patients with weak p53 expression and 8.6 months longer than the patients with moderate p53 expression. No correlation was found between the expression of the other markers and prognosis. Conclusion: The results suggest that Ki-67, PCNA, pRb, p16, p53 and Bax participate in the pathogenesis of EAC, whereas Bcl-2 does not play essential role in EAC and BE-associated dysplasia. The balance between cell proliferation and apoptosis is lost in EAC and BE-associated dysplasia. Abnormal p53 protein expression has predictive and prognostic value in EAC. Larger prospective studies are needed to confirm these findings.

关键词： Esophageal Adenocarcinoma Biomarkers Cell Cycle Proliferation Apoptosis

Zeolite Synthesis under Insertion of Silica Rich Filtration Residues from Industrial Wastewater Reconditioning

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Advances in Chemical Engineering and Science 2014年第2期4卷 120-134页

作者： Andrea Hartmann v.petrov J.-C.Buhl K.Rübner M.Lindemann C.Prinz A.Zimathies Institut für Mineralogie Universitat HannoverHannoverGermany Fachgruppe vII.1 Baustoffe Bundesanstalt für Materialforschung und-prüfung(BAM)BerlinGermany Fachbereich 1.3 Strukturanalytik Richard-Willstätter Bundesanstalt für Materialforschung und-prüfung(BAM)BerlinGermany

Zeolite synthesis was studied using two silica rich filtration residues (FR 1 and FR 2) as Si-source and sodium aluminate in a direct synthesis at 60°C at strong alkaline conditions (8 M - 16 M NaOH). In addition to these one-pot syntheses, a two-step process was investigated. Here, an alkaline digestion of FR at 60°C was followed by gel precipitation with sodium aluminate and gel crystallization under usual conditions of 80°C - 90°C. The results show that the substitution of chemical reagent sodium silicate by a waste material like FR as Si-source is possible but requires fine tuning of the reaction conditions as zeolite crystallization is a process under kinetic control. The solubility behaviour and impurities of the inserted filtration residues strongly influenced the course of reaction. Thus zeolites like hydrosodalite or intermediate zeolite between cancrinite and sodalite, or zeolite NaA or Z-21 in cocrystallization with hydrosodalite could be observed in the one pot syntheses already in a short time interval between 1 - 4 h depending on the alkalinity. The two step process yield to zeolites NaA and NaX in very good quality. The reaction process of FR in both reaction methods was characterized by chemical analyses, X-ray powder diffraction, Fourier transform infrared spectroscopy as well as scanning electron microscopy. Surface area and water content of selected products were further characterized by the BET-method and by thermogravimetry. Summing up the results, we can show that zeolite formation from filtration residues is possible by several reaction procedures as model cases for a re-use of industrial waste materials. Beside the importance for environmental protection, the reactions are of interest for zeolite chemistry as the re-use of FR is possible under economically conditions of low energy consumption at 60°C and short reaction periods.

关键词： Zeolites Superalkaline Conditions Filtration Residues Re-Use of Industrial Waste Reaction Kinetics Silica Residue

Upper Hybrid Resonance RADAR Scattering Diagnostics of Small Scale Turbulence in FT-1 Tokamak

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中国核科技报告 1999年第S4期 384-384页

作者： A.D.gurchenko,E.Z.gusakov,M.M.Larionov,K.M.Novik,Yu.v.petrov,A.N.Saveliev,v.L.Selenin,A.Yu.Stepanov Ioffe Physico-Technical Institute Politekhnicheskaya 26 194021 St.Petersburg Russia Ioffe Physico-Technical Institute Politekhnicheskaya 26 194021 St.Petersburg Russia Ioffe Physico-Technical Institute Politekhnicheskaya 26 194021 St.Petersburg Russia Ioffe Physico-Technical Institute Politekhnicheskaya 26 194021 St.Petersburg Russia Ioffe Physico-Technical Institute Politekhnicheskaya 26 194021 St.Petersburg Russia Ioffe Physico-Technical Institute Politekhnicheskaya 26 194021 St.Petersburg Russia Ioffe Physico-Technical Institute Politekhnicheskaya 26 194021 St.Petersburg Russia Ioffe Physico-Technical Institute Politekhnicheskaya 26 194021 St.Petersburg Russia

The new diagnostic technique, utilizing RADAR microwave scattering in the Upper Hybrid Resonance (UHR) has been developed and applied for study of spontaneous magnetic field and density turbulence in the FT-1 tokamak.... 详细信息

关键词： Upper Hybrid Resonance RADAR Scattering Diagnostics of Small Scale Turbulence in FT-1 Tokamak FT

The Study of Different Structuring Techniques for Creation of Non-Evaporable getters

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Materials Sciences and Applications 2013年第8期4卷 57-61页

作者： Anton Boyko Dahir gaev Sergei Timoshenkov Yuri Chaplygin vladimir petrov Kabardino-Balkarian State University Moscow Russia National Research University of Electronic Technology Moscow Russia Research Institute of Advanced Materials and Technology Moscow Russia

The results of observation of different structuring techniques of thin metal layers applied in micro system technologies are presented. The Ti v getter films formed by magnetron sputtering have been explored using scanning electron and atomic-force microscopy, Brunauer-Emmett-Teller method, thermogravimetric analysis and fractal geometry. The film sorption capacity for hydrogen given by thermogravimetry was of 7.7 m3·Pa·g-1. To estimate the effective surface area, the fractal geometry tools were used and the calculated value of the specific surface area was about 155 m2/m3. The second object under investigation was a structure composed of micro- and mesoporous silicon and copper layer deposited electrochemically on the pore walls. Porous silicon when coupled with a reactive metal or alloy is expected to be an effective getter for micro system techniques. The use of porous silicon and specific conditions of depositions allows to form the structure of complex fractal type with a specific surface area of 167 m2/cm3.

关键词： Non-Evaporable getters MEMS Structuring Magnetron Sputtering Electrodeposition Porous Silicon

The Methodological Way to Diagnostic of Efficiency Active Leaching Materials

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Materials Sciences and Applications 2012年第2期3卷 116-119页

作者： Nikolay N. petrov Roman v. gorokhov Tatyana N. Musorina Tatyana B. Kasatkina Natalya A. Shkabara Nikolay N. Bukov 不详

It was demonstrated possibility of express diagnostic of characters and prediction efficiency of leaching materials on the bases comparison release rate of active substance and accelerated field tests. It makes on the... 详细信息

关键词： Barrier Diffusion Moderator Release Rate Antifouling Diagnostic of Efficiency

gaN基功率型微波双异质结构场效应晶体管的技术发展(英文)

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电子工业专用设备 2013年第2期42卷 17-20,64页

作者： S.I.petrov A.N.Alexeev D.M.Krasovitsky v.P.Chaly SemiTEq股份公司 Svetlana-Rost股份公司

有关结果表明,在氨分子束外延STE3N2系统中,以极高的温度(1 100-1 150℃)让氮化铝缓冲层进行增长是为DHFET(双异质结构场效应晶体管)通道获得高品质gaN(氮化镓)层的关键步骤。缓冲层从包含AlN(氮化铝)、AlgaN/AlN(氮化铝镓/氮化铝)超晶... 详细信息

有关结果表明,在氨分子束外延STE3N2系统中,以极高的温度(1 100-1 150℃)让氮化铝缓冲层进行增长是为DHFET(双异质结构场效应晶体管)通道获得高品质gaN(氮化镓)层的关键步骤。缓冲层从包含AlN(氮化铝)、AlgaN/AlN(氮化铝镓/氮化铝)超晶格与AlgaN(氮化铝镓)过渡层的c-蓝宝石衬底开始排列。透射电子显微镜的研究表明,穿透位错密度从AlN层的(2～4)×1010cm-2逐渐减少到顶部gaN活动层的(9～10)×108cm-2。结构质量的改善使得电子迁移率大幅度增长至600～650 cm2/v.s,而在一个1.5μm厚、略含硅元素的gaN顶层中高达3×1016～5×1016cm-3。这些结果表明生长于蓝宝石上的金属有机气相沉积gaN具有良好品质,并且比传统的分子束外延好几倍。在带有Alxga1-xN顶部阻挡层(x=0.25-0.4)的双异质结构(DH)中使用这样一个gaN层可以让二维电子气中的电子面密度、迁移率与薄层电阻分别在1 300～1 700 cm2/v.s、(1.0～1.8)×1013cm-2与230～400Ω/sq的范围内发生变化。该技术的应用以及为了在SiC(碳化硅)基板上生长而采用的DH设计使得我们可以为0.03～4.0 gHz的超宽频功率放大器(输出功率为2.5 W、增益为17～25 dB、效率为30%)制造出一个带有0.5μm门信号宽度的DHFET。

关键词：分子束外延(MBE)系统氮化铝(AIN) 氮化镓(gaN) 三族氮化物双异质结构场效应晶体管(DHFET)

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THE LASER TOMOgRAPHICAL METHOD USINgMINIMUM OF PROJECTION FOR BIOLOgICAL OBJECT STRUCTURE STUDY

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激光生物学报 1995年第3期 679-684页

作者： Yuri N. Kulchin Oleg B. vitrik Oleg v. Kiricheiko Yuri S.petrov Oleg T. Kamenev(Far Eastern State Technical University 690600,vladivostok,Pushkinskaya 10,Department of Physics,Russia)

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ＴＨＥＬＡＳＥＲＴＯＭＯＧＲＡＰＨＩＣＡＬＭＥＴＨＯＤＵＳＩＮＧＭＩＮＩＭＵＭＯＦＰＲＯＪＥＣＴＩＯＮＦＯＲＢＩＯＬＯＧＩＣＡＬＯＢＪＥＣＴＳＴＲＵＣＴＵＲＥＳＴＵＤＹＹｕｒｉＮ．Ｋｕｌｃｈｉｎ；ＯｌｅｇＢ．Ｖｉｔｒｉｋ；ＯｌｅｇＶ．Ｋｉｒｉｃｈｅｉ...

关键词： Tomography Nondistructive study of biological objects Measuring schema.