检索结果-南通市图书馆

Geoscience Frontiers 2013年第4期4卷 409-421页

作者： enver akaryali Necati Tysz Gumushane University Department of Geology Karadeniz Technical University.Department of Geology

The Arzular mineralization is one of the best examples of epithermal gold deposits in the eastern Pontides orogenic belt. The mineralization is hosted by the subduction-related basaltic andesites and is mainly controlled by E W and NE SW trending fracture zones. The main ore minerals are galena. sphalerite, pyrite, chalcopyrite, tetrahedrite and gold. Homogenization temperatures of fluid inclu- sions are between 130 and 295 C for quartz and between 90 and 133 C for sphalerite. Sulphur isotope values obtained fiom pyrite, galena and sphalerite vary between 1.2‰ and 3‰ indicating that sulphur belongs to magmatic origin and was derived from the Lutetian non-adakitic granitic intrusions in the region. Oxygen isotope values are between 15.0‰, and 16.7‰ and hydrogen isotope values are between -87‰ and 91‰ The sulphur isotope thermometer yielded temperatures in the range of 244-291 C for the ore formation. Our results support the hypothesis that the Arzular mineralization is a low-sulfidation epithermal gold deposit associated with non-adakitic subduction- related granitic magmas that were generated by slab window-related processes in a south-dipping subduction zone during the Lutetian.

关键词： Slab windowEpithermal goldIsotopeFluid inclusionMineralizationTectonics

Prediction of mine drainage generation potential and the prevention method of the groundwater pollution in the Gümüskoy(Kütahya)mineralization area,NW Turkey

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2020年第10期17卷 2387-2404页

作者： Selcuk ALEMDAG enver akaryali Mehmet Ali GuCER Department of Geological Engineering Faculty of Engineering and Natural SciencesGumusşhane UniversityGumushane29100Turkey

One of the leading factors of seepage contamination is mine drainage,which creates serious ecological risks on the environment both during operation and post-mining *** this study,experimental processes have been carried out to determine the occurrence of mine drainage in the Gümüskoy(Kütahya)mineralization area(Northwest Turkey).The prevention method for potential mine drainage occurrence has been also *** enrichment was observed which are directly related to mineralization in trace element concentrations,especially in potentially toxic metals such as Ag,Cd,Mo,Ba,Bi,and *** on short-term tests,mine drainage formation has not been expected according to the p H(7.36-9.38),contact leaching,and acid-base accounting ***,in the long-term,acid generation potential has been expected because of weathering and oxidation in terms of rock type and mineralization in the ***,in order to prevent groundwater contamination in the event of a possible formation of mine drainage,the hydraulic conductivity of the stock area bedrock was evaluated by the in situ tests performed in the field and it was found to be moderately permeable(K=1.9×10^-6 m/s).In order to make the stock area bedrock impermeable,natural clay will be laid and compressed at the base of the stock *** the finite elements were modeled by seepage analysis,the seepage discharge to be formed on the base rock at a depth of 5 m was determined as 3.17×10^-19 m^3/*** the discharge value determined in the seepage analysis after modeling is very close to zero,contamination of possible ground and surface water will be prevented.

关键词： Ecological risks Environmental assessment Mine drainage Seepage analysis

The nature of transition from adakitic to non-adakitic magmatism in a slab window setting:A synthesis from the eastern Pontides,NE Turkey

在线全文

学校读者我要写书评

暂无评论

Geoscience Frontiers 2013年第4期4卷 353-375页

作者： Yener Eyuboglu M.Santosh Francis O.Dudas enver akaryali Sun-Lin Chung Kemal Akdag Osman Bektas Department of Geological Engineering.Karadeniz Technical University School of Earth Sciences and Resources.China University of Geosciences(Beijing) Department of Earth.Atmospheric and Planetary Sciences.Massachusetts Institute of Technology Department of Geological Engineering.Gumushane University Department of Geosciences National Taiwan University

The eastern Pontides orogenic belt provides a window into continental arc magmatism in the Alpine-Himalayan belt. The late Mesozoic-Cenozoic geodynamic evolution of this belt remains controversial. Here we focus on the nature of the transition from the adakitic to non-adakitic magmatism in the Kale area of Gumushane region in NE Turkey where this transition is best preserved. The adakitic lithologies comprise porphyries and hyaloclastites. The porphyries are represented by biotite-rich andesites, hornblende-rich andesite and dacite. The hayaloclastites represent the final stage of adakitic activity and they were generated by eruption/intrusion of adakitic andesitic magma into soft carbonate mud. The non-adakitic lithologies include basaltic-andesitic volcanic and associated pyroclastic rocks. Both rock groups are cutting by basaltic dikes representing the final stage of the Cenozoic magmatism in the study area. We report zircon U-Pb ages of 48.71 ± 0.74 Ma for the adakitic rocks, and 44.68 ± 0.84 Ma for the non-adakitic type, suggesting that there is no significant time gap during the transition from adakitic to non-adakitic magmatism. We evaluate the origin, magma processes and tectonic setting of the magmatism in the southern part of the eastern Pontides orogenic belt. Our results have important bearing on the late Mesozoic-Cenozoic geodynamic evolution of the eastern Mediter- ranean region.

关键词： AdakiteGeochemistryZircon U-Pb geochronologyMagma tectonicsEastern Pontides

Is endoscopic ultrasound a promising technique in the diagnosis and treatment of liver diseases?

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2024年第22期30卷 2920-2922页

作者： enver Zerem Željko Puljiz Boris Zdilar Suad Kunosic Admir Kurtcehajic Omar Zerem Department of Medical Sciences The Academy of Sciences and Arts of Bosnia and HerzegovinaSarajevo 71000Sarajevo CantonBosnia and Herzegovina Department of Gastroenterology and Hepatology University Clinical Center SplitSplit 21000Croatia Department of Medicine Croatian Military AcademyZagreb 10000Croatia Department of Physics Faculty of Natural Sciences and MathematicsUniversity of TuzlaTuzla 75000Tuzla KantonBosnia and Herzegovina Department of Gastroenterology and Hepatology Blue Medical GroupTuzla 75000Tuzla KantonBosnia and Herzegovina Department of Internal Medicine Cantonal Hospital“Safet Mujić”MostarMostar 88000Bosnia and Herzegovina

Percutaneous ultrasound has been a longstanding method in the diagnostics and interventional procedures of liver *** some countries,its use is restricted to radiologists,limiting access for other clinicians,such as *** ultrasound,as a novel technique,plays a crucial role in diagnosis and treatment of digestive ***,its use is sometimes recommended for conditions where no clear advantage over percutaneous ultrasound exists,leaving the impression that clinicians sometimes resort to an endoscopic approach due to the unavailability of percutaneous options.

关键词： Endoscopic ultrasound Percutaneous ultrasound Liver biopsy Fine needle aspiration Focal liver lesion Liver abscess drainage

Could near focus endoscopy,narrow-band imaging,and acetic acid improve the visualization of microscopic features of stomach mucosa?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Endoscopy 2024年第3期16卷 157-167页

作者： Admir Kurtcehajic enver Zerem Tomislav Bokun Ervin Alibegovic Suad Kunosic Ahmed Hujdurovic Amir Tursunovic Kenana Ljuca Department of Gastroenterology and Hepatology Blue Medical GroupTuzla 75000Tuzla KantonBosnia and Herzegovina Department of Medical Sciences The Academy of Sciences and Arts of Bosnia and HerzegovinaSarajevo 71000Bosnia and Herzegovina Department of Gastroenterology and Hepatology University Clinical Hospital DubravaZagreb 10000Croatia Department of Gastroenterology and Hepatology University Clinical Center TuzlaTuzla 75000Tuzla KantonBosnia and Herzegovina Department of Physics Faculty of Natural Sciences and MathematicsUniversity of TuzlaTuzla 75000Tuzla KantonBosnia and Herzegovina Department of Internal Medicine Blue Medical GroupTuzla 75000Tuzla KantonBosnia and Herzegovina Department of Surgery University Clinical Center TuzlaTuzla 75000Bosnia and Herzegovina School of Medicine University of TuzlaTuzla 75000Bosnia and Herzegovina

BACKGROUND Conventional magnifying endoscopy with narrow-band imaging(NBI)observation of the gastric body mucosa shows dominant patterns in relation to the regular arrangement of collecting venules,subepithelial capillary network,and gastric *** To evaluate the effectiveness of a new one-dual(near)focus,NBI mode in the assessment of the microscopic features of gastric body mucosa compared to conventional *** During 2021 and 2022,68 patients underwent proximal gastrointestinal endoscopy using magnification endoscopic modalities subsequently applying acetic acid(AA).The GIF-190HQ series NBI system with dual focus capability was used for the investigation of gastric *** the time of the endoscopy,the gastric body mucosa of all enrolled patients was photographed using the white light endoscopy(WLE),near focus(NF),NF-NBI,AA-NF,and AA-NF-NBI *** The WLE,NF and NF-NBI endoscopic modes for all patients(204 images)were classified in the same order into three *** images from each patient for the AA-NF and AA-NF-NBI endoscopic modes were classified in the same *** to all three observers who completed the work independently,NF magnification was significantly superior to WLE(P<0.01),and the NF-NBI mode was significantly superior to NF magnification(P<0.01).After applying AA,the three observers confirmed that AA-NF-NBI was significantly superior to AA-NF(P<0.01).Interobserver kappa values for WLE were 0.609,0.704,and 0.598,respectively and were 0.600,0.721,and 0.637,respectively,for NF *** the NF-NBI mode,the values were 0.378,0.471,and 0.553,*** AA-NF,they were 0.453,0.603,and 0.480,respectively,and for AA-NF-NBI,they were 0.643,0.506,and 0.354,*** When investigating gastric mucosa in microscopic detail,NF-NBI was the most powerful endoscopic mode for assessing regular arrangement of collecting venules,subepithelial capillary network,and gastric pits among the five endoscopic

关键词： Gastric mucosa Endoscopic microanatomy Magnifying endoscopy Near focus Narrow-band imaging Acetic acid

Influence of Fluoride Content of Artificial Saliva on Metal Release from 17-4 PH Stainless Steel Foam for Dental Implant Applications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2013年第6期29卷 582-588页

作者： Ilven Mutlu enver Oktay Department of Metallurgical and Materials Engineering Istanbul UniversityIstanbulTurkey

Highly porous 17-4 PH stainless steel foam for implant applications was produced by space holder technique. Metal release and weight loss from 17-4 PH stainless steel foams were investigated in fluoride added artificial saliva environment by static immersion test. An inductively coupled plasma-mass spectrometer was employed to measure the concentrations of various metal ions. Effects of fluoride content of artificial saliva on metal release and weight loss from the steel foams were investigated. Effects of immersion time, pH value and process parameters on the weight loss and metal release were determined. Pore morphology, pore size and mechanical properties of the 17-4 PH stainless steel foams were also characterized.

关键词： Metal release Dental implant Metal foam Fluoride Artificial saliva

Treatment of severe acute pancreatitis and its complications

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第38期20卷 13879-13892页

作者： enver Zerem Department of Gastroenterology University Clinical Center Tuzla Department of Medical Sciences The Academy of Sciences and Arts of Bosnia and Herzegovina

Severe acute pancreatitis(SAP),which is the most serious type of this disorder,is associated with high morbidity and mortality. SAP runs a biphasic course. During the first 1-2 wk,a pro-inflammatory response results in systemic inflammatory response syndrome(SIRS). If the SIRS is severe,it can lead to early multisystem organ failure(MOF). After the first 1-2 wk,a transition from a pro-inflammatory response to an anti-inflammatory response occurs;during this transition,the patient is at risk for intestinal flora translocation and the development of secondary infection of the necrotic tissue,which can result in sepsis and late MOF. Many recommendations have been made regarding SAP management and its complications. However,despite the reduction in overall mortality in the last decade,SAP is still associated with high mortality. In the majority of cases,sterile necrosis should be managed conservatively,whereas in infected necrotizing pancreatitis,the infected non-vital solid tissue should be removed to control the sepsis. Intervention should be delayed for as long as possible to allow better demarcation and liquefaction of the necrosis. Currently,the step-up approach(delay,drain,and debride) may be considered as the reference standard intervention for this disorder.

关键词： Acute necrotizing pancreatitis Infection Sepsis Drainage Gastrointestinal endoscopy

Ultrasound guided percutaneous treatment for splenic abscesses: The signifi cance in treatment of critically ill patients

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2006年第45期12卷 7341-7345页

作者： enver Zerem Jacob Bergsland Interventional Ultrasonography Department University Clinical Centar Tuzla Bosnia and Herzegovina

AIM: To analyze the results of ultrasound guided percu- taneous needle aspiration (PNA) and percutaneous catheter drainage (PCD) in the treatment of splenic abscess. METHODS: Thirty-six patients (14 females and 22 males, with an average age of 54.1 ± 14.1 years) with splenic abscess were treated with ultrasound guided PNA and/or PCD. Patients with splenic abscess < 50 mm in diameter were initially treated by PNA and those with abscess ≥ 50 mm and bilocular abscesses were initially treated by an 8-French catheter drainage. The clinical characteristics, underlying diseases, organism spectra, therapeutic methods, and mortality rates were analyzed. RESULTS: Twenty-seven patients had unilocular and 9 bilocular abscess. PNA was performed in 19 patients (52.8%), and 8 of them (42.1%) required PCD because of recurrence of abscess. In 17 patients (47.2%), PCD was performed initially. PCD was performed twice in six patients and three times in two. PNA was defi nitive treatment for 10 and PCD for 21 patients. One patient with PCD was referred for splenectomy, with successful outcome. In all 4 deceased patients, malignancy was the underlying condition. Twenty-one patients (58.3%) underwent 33 surgical interventions on abdomen before treatment. Cultures were positive in 30 patients (83.3%). Gram-negative bacillus predominated (46.7%). There were no complications related to the procedure. CONCLUSION: Percutaneous treatmnet of splenic abscess is an effective alternative to surgery, allowing preservation of the spleen. This treatment is especially indicative for the patients in critical condition postoperatively. We recommend PNA as primary treatment for splenic abscesses < 50 mm, and PCD for those ≥ 50 mm in diameter and for bilocular abscesses.

关键词： Interventional ultrasound Needle aspiration Catheter drainage Spleen preservation

Comments on the article about the treatment of peripancreatic infection

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2010年第18期16卷 2321-2322页

作者： enver Zerem Goran Imamovic The University Clinical Centre Tuzla

We read with great interest the article by Tang et al published in issue 4 of World Journal of Gastroenterology *** results of their study indicate that percutaneous catheter drainage in combination with choledochoscope-guided debridement is a simple,safe and reliable treatment procedure for peripancreatic infections secondary to severe acute ***,there are some points that need to be addressed,including data about the patients in the study and their clinical characteristics,data about infection and superinfection during the treatment and type of treatment of patients with acute necrotizing pancreatitis.

关键词： Acute pancreatitis Pancreatic necrosis Infection Non-surgical management

Biomarkers for noninvasive biochemical diagnosis of nonalcoholic steatohepatitis:Tools or decorations?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2009年第34期15卷 4346-4347页

作者： Yusuf Yilmaz enver Dolar Department of Gastroenterology Marmara UniversitySchool of Medicine Department of Gastroenterology Uludag University Medical School

In light of the growing epidemics of nonalcoholic fatty liver disease(NAFLD),identification and validation of the novel biochemical surrogate markers for nonalcoholic steatohepatitis(NASH)are paramount to reduce the necessity for liver *** availability of such markers has tremendous potential to radically alter the management strategies of NAFLD patients and to monitor the disease *** current biomarkers do not entirely fulfill the many requirements for the identification of patients with NASH,they should not discourage our quest,but remind us that we need to cognize the challenges ahead.

关键词： Nonalcoholic fatty liver disease Nonalcoholic steatohepatitis Biomarkers Liver biopsy