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Direct microwave leaching conditions of rare earth elements in fluorescent wastes

Journal of Rare Earths 2024年第6期42卷 1165-1174,I0007页

作者： a.bilen B.Birol M.N.Saridede S.S.Kaplan M.S.Sonmez Department of Metallurgical and Materials Engineering Yildiz Technical UniversityIstanbulTurkey Department of Chemical Engineering and Materials Science Stevens Institute of TechnologyNew JereyUSA Department of Metallurgical and Materials Engineering Istanbul Technical UniversityIstanbulTurkey

The luminescent phosphor powder in the fluorescent lamp constitutes 2%of the lamp’s *** can be mentioned that fluorescent wastes are a crucial raw material to produce rare earth *** the present study,microwave leaching process was conducted to dissolve rare earth elements yttrium(Y),europium(Eu),and remaining rare earth elements(REEs)present in the phosphor powder of the fluorescent *** the yields were *** the microwave leaching process,the effects of the temperature(80-160℃),acid type(hydrochloric acid(HCl),nitric acid(HNO_(3)),sulphuric acid(H_(2)SO_(4))),acid concentration(0.5-6 mol/L),solid to liquid ratio(0.1:10-0.5:10)and reaction time(5-90 min)parameters on leaching efficiencies of varying rare earth elements and calcium were *** highest yield was obtained in the direct microwave leaching of fluorescent waste with the experimental conditions of 6 mol/L HCl,160℃,0.1:10 solid-to-liquid ratio(S:L),and 90 *** energy calculations were made,and kinetic models of the reactions were obtained,and it is observed that Y and Eu dissolution is diffusion-controlled,on the other hand,lanthanum(La),cerium(Ce),and terbium(Tb)were examined to be chemical reaction ***,calcium(Ca)and gadolinium(Gd)seem coherent with the mixed ***,mathematical models of all experimental studies are created with the response surface Box-Behnken method and the correlation coefficients of all the models are over 90%.

关键词： Rare earth elements(REEs) Direct microwave leaching Fluorescent waste Kinetic models Response surface method

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A comparative study for petroleum removal capacities of the bacterial consortia entrapped in sodium alginate,sodium alginate/poly(vinyl alcohol),and bushnell haas agar

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Petroleum Science 2024年第1期21卷 705-715页

作者： Sezen bilen Ozyurek Department of Biology(Biotechnology) Faculty of ScienceHacettepe UniversityAnkaraBeytepe06800Turkey

The purpose of this study was to identify and compare the degradation efficiencies of free and entrapped bacterial consortia(Staphylococcus capitis CP053957.1 and Achromobacter marplatensis MT078618.1)to different polymers such as Sodium Alginate(SA),Sodium Alginate/Poly(Vinyl Alcohol)(SA/PVA),and Bushnell Haas Agar(BHA).In addition to SA and SA/PVA,which are cost-effective,non-toxic and have different functional groups,BHA,which is frequently encountered in laboratory-scale studies but has not been used as an entrapment material until *** on these,the polymers with different surface morphologies and chemical compositions were analyzed by SEM and *** the petroleum removal efficiency was higher with the entrapped bacterial consortia than with the free one,BHA-entrapped bacterial consortium enhanced the petroleum removal more than SA and SA/***,the degradation rate of bacterial consortia entrapped with BHA was 2.039 day^(-1),SA/PVA was 1.560,SA was 0.993,the half-life period of BHA-entrapped bacterial consortia is quite low(t_(1/2)=0.339)compared with SA(t_(1/2)=0.444)and SA/PVA(t_(1/2)=0.697).The effects of the four main factors such as:amount of BHA(0.5,1,1.5,2,2.5,3 g),disc size(4,5,6,7,8 mm),inoculum concentration(1,2.5,5,7.5,10 mL),and incubation period on petroleum removal were also *** maximum petroleum removal(94.5%)was obtained at≥2.5 mL of bacterial consortium entrapped in 2 g BHA with a 7 mm disc size at 168 h and the results were also confirmed by statistical *** a decrease was observed during the reuse of bacterial consortium entrapped in BHA,the petroleum removal was still above 50%at 10th *** on GC-MS analysis,the removal capacity of BHA-entrapped consortium was over 90%for short-chain n-alkanes and 80%for medium-chain ***,the obtained data are expected to provide a potential guideline in cleaning up the large-scale oil pollution in the *** there has been no similar stud

关键词： Entrapment of bacterial consortia Petroleum RemovalBushnell Haas agar Sodium alginate Sodium alginate/poly(vinyl alcohol)

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A novel preoperative inflammatory marker prognostic score in patients with localized and metastatic renal cell carcinoma

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Asian Journal of Urology 2017年第4期4卷 230-238页

作者： Rishi R.Sekar Dattatraya Patil Yoram Baum Jeffrey Pearl Anna Bausum Mehmet a.bilen Omer Kucuk Wayne B.Harris Bradley C.Carthon Mehrdad Alemozaffar Christopher P.Filson John G.Pattaras Peter T.Nieh Kenneth Ogan Viraj A.Master Department of Urology Emory University School of MedicineAtlantaGAUSA Department of Hematology and Medical Oncology Emory University School of MedicineAtlantaGAUSA Winship Cancer Institute of Emory University Emory University School of MedicineAtlantaGAUSA The Atlanta VA Medical Center Emory University School of MedicineAtlantaGAUSA

Objective:Several inflammatory markers have been studied as potential biomarkers in renal cell carcinoma(RCC),however few reports have analyzed their prognostic value in aggregate and in non-clear cell *** hypothesize that a combination of specific inflammatory markers into an RCC Inflammatory Score(RISK)could serve as a rigorous prognostic indicator of overall survival(OS)in patients with clear cell and non-clear cell ***:Combination of preoperative C-reactive protein(CRP),albumin,erythrocyte sedimentation rate(ESR),corrected calcium,and aspartate transaminase to alanine transaminase(AST/ALT)ratio was used to develop *** was developed using grid-search methodology,receiver-operating-characteristic(ROC)analysis,and sensitivity-specificity trade-off *** value of RISK was analyzed using the KaplaneMeier method and Cox proportional regression *** accuracy was compared with RISK to Size,Size,Grade,and Necrosis(SSIGN)score,University of California-LOS Angeles(UCLA)Integrated Staging System(UISS),and Leibovich Prognosis Score(LPS).

关键词： Renal cell carcinoma Inflammation Prognosis Biomarker

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Correlation between visual function and refractive,topographic, pachymetric and aberrometric data in eyes with keratoconus

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International Journal of Ophthalmology(English edition) 2016年第8期9卷 1127-1133页

作者： Neslihan Bayraktar bilen Ibrahim F.Hepsen Carlos G.Arce Department of Ophthalmology Ankara Numune Education and Research Hospital Department of Ophthalmology Gazi University Medical School Ocular Bioengineering & Refractive Surgery Sectors Institute of Vision Department of Ophthalmology Paulista School of Medicine Federal University of So Paulo Research & Development Consultant Zeimer Group AG

AIMTo analyze the relationship between two visual functions and refractive, topographic, pachymetric and aberrometric indicators in eyes with *** distance visual acuity (CDVA), and letter contrast sensitivity (CS) were correlated with refraction, corneal topography, pachymetry, and total corneal wavefront data prospectively in 71 eyes with keratoconus. The topographic indices assessed were simulated keratometry for the flattest and steepest meridians (SimK1 and SimK2), posterior steeper K (Ks), elevation value in best-fit sphere (BFS) maps, squared eccentricity (Є2), aspheric asymmetric index (AAI), pachymetry, thickness progression index (TPI), the amount of pachymetric decentralization (APD), and GalileiTM-keratoconus *** mean CDVA (expressed as logMAR) were 0.25±0.21. The mean CS was 1.25±0.46. The spherical refraction correlated well with CDVA (r=-0.526, P2 and maximum BFS correlated significantly with the visual function (P≤0.001 for all).CONCLUSIONIn this study, CS is more affected than CDVA as a visual function. The quantity and quality of vision is significantly correlated with well-known and new topographic indices. There is not a significant correlation between visual function and pachymetric parameters. The significantly correlated indices can be used in staging keratoconus and to follow the outcome of a treatment.

关键词： keratoconus topographic index contrast sensitivity visual quality corneal aberration

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Improvement in renal functions with transcatheter aortic valve implantation

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Journal of Geriatric Cardiology 2013年第4期10卷 317-322页

作者： Telat Keleş Huseyin Ayhan Durmaz Sarı Aslan AN Erdoğan KE Kasapkara.bilen Bayram Akçay Bozkurt Department of Cardiology Yıldırım Beyazıt University Bilkent 06800 Ankara Turkey Department of Cardiology Ankara Ataturk Education and Research Hospital Bilkent 06800 Ankara Turkey Department of Cardiovascular Surgery Ankara Ataturk Education and Research Hospital Bilkent 06800 Ankara Turkey.

BACKGROUND & OBJECTIVES:In recent years, emerging transcatheter aortic valve implantation (TAVI) has become an alternative for surgery。 However, with advanced age, several co-morbid factors together with contrast agent usage can cause deterioration in renal function and increase in the risk of acute kidney injury (AKI) with poor prognosis in patients with AKI。 Therefore, many patients cannot benefit from this treatment。 In this study, we aim to examine the effects of TAVI on renal functions。 METHODS AND RESULTS: Seventy patients, mean age of 77.6 years, underwent TAVI between July 2011 and December 2012。 Estimated glomerular filtration rate (eGFR) was calculated by using the Cockcroft and Gault Formula。 Patients were monitored for 48 h for urine output。 Stage 1 AKI, according to the VARC-2 AKIN system, developed in only five (7.1%) of the patients after the procedure。 There was a statistically significant increase between the mean 1(st) month eGFRs before (68。2 vs。 61.0, P < 0.01) and after (68。2 vs。 63.6, P < 0.05) the TAVI in the cohort。 After TAVI (48。5 mL/min, P < 0.01) and the 1(st) month (52.1 mL/min, P < 0.01), the eGFR of the 36 (51.4%) patients diagnosed with chronic kidney disease before the procedure showed a statistically significant increase in renal functions。 The hospital mortality rate was higher in the group which developed AKI (P < 0.01)。 First month eGFR showed a more statistically significant increase than pre-TAVI eGFR (62.8 and 69.8, P < 0.05, respectively) in AKI developing patients and this difference - though statistically not significant - continued into the sixth month。 CONCLUSIONS: In this study, we showed that the treatment of aortic stenosis through TAVI allows improvement of renal functions, and that AKI rates will be lower with careful patient selection, proper pre-procedural hydration, and careful use of contrast agent。

关键词： Improvement Kidney injury Transcatheter aortic valve implantation

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Radiation of Ultra Low Frequency Electromagnetic Waves from Atmosphere under the Influence of Strong Shock Waves

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Chinese Physics Letters 2015年第3期32卷 39-41页

作者： A. R. Aramyan S. A. Aramyan S. G. bilen L. Sh. Grigoryan H. F. Khachatryan Institute of Applied Problems of Physics National Academy of Sciences of Armenia Yerevan 0014 Republic of Armenia International Scientific and Educational Center National Academy of Sciences of Armenia Yerevan 0019 Republic of Armenia Pennsylvania State University University Park PA USA

We present preliminary results from the experimental investigation of the response of the atmosphere due to the impact of powerful shock waves. The response is evidenced as ultra low frequency electromagnetic wave radiation at frequency of 2-5 kHz and in duration of 3 7s. We hypothesize that this radiation appears due to the following process： the shock wave ionizes the neutral particles in the air and these charged and neutral particles continue their vertical motion, which forms in the trail of the shock wave. Such motion can cause the cyclotron-like radiation measured.

关键词： Radiation of Ultra Low Frequency Electromagnetic Waves from Atmosphere under the Influence of Strong Shock Waves

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Evaluation of CA125 and NT-proBNP values in patients undergoing transcatheter aortic valve implantation

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Journal of Geriatric Cardiology 2015年第2期12卷 100-106页

作者： Huseyin Ayhan Haca Ahmet Kasapkara Tahir Durmaz Telat Keles Cenk San Serdal Bastug Kemal Esref Erdogan Nihal Akar Bayram Emine bilen Murat Akgay Engin Bozkurt Faculty of Medicine Department of Cardiology Ytldtrtm Beyaztt University Ankara 06800 Turkey Department of Cardiology Ankara Ataturk Education and Research Hospital Ankara 06800 Turkey Faculty of Medicine Department of Cardiovascular Surgery Yddtrtm Beyaztt University Ankara 06800 Turkey

BackgroundTranscatheter 大动脉的阀门培植(TAVI ) 是在通过手术高的风险，或不能实行的病人的最低限度地侵略的、新兴的治疗。为风险分类使用的参数在病人的选择有一些缺乏。学习是在糖类抗原 125 上评估 TAVI 的影响的这的目的(CA125... 详细信息

BackgroundTranscatheter 大动脉的阀门培植(TAVI ) 是在通过手术高的风险，或不能实行的病人的最低限度地侵略的、新兴的治疗。为风险分类使用的参数在病人的选择有一些缺乏。学习是在糖类抗原 125 上评估 TAVI 的影响的这的目的(CA125 ) 和 N 终端职业人员大脑类型 Natriuretic 肽(NT-proBNP ) 作为在最近的年里经常被使用了的 biomarkers，并且也到 *** & 的这些 biomarkers 的关系；ResultsTranscatheter 大动脉的阀门培植在这研究在 31 个病人上被练习。然后，在病人学习在以前并且在 TAVI 以后的 CA125 和 NT-proBNP 层次被评估。病人也根据他们的左室的喷射部分(LVEF ) 被组织， CA125 铺平(LVEF ≥；40% 并且 <；40% ；CA125 ≤；35 U/L 和 >；35 U/L ) 。TAVI 手术成功地在所有病人被动。没有在里面医院死亡，在功能的能力的实质的改进在跟帖被检测。另外，统计上重要的减少在所有病人的 post-TAVI CA125 和 NT-proBNP 层次被检测(CA125 83.8 ±；18.1 U/L 对 64.3 ±；14.2 U/L， P = 0.008；NT-proBNP：4633.6 ±；627.6 pg/mL 对 2866.3 ±；536.8 pg/mL， P <；0.001 ) 。在根据 CA125 层次划分的组，也在 CA125 层次有统计上重要的 post-TAVI 衰落。在 CA125 > 以内；35 U/L 和 LVEF <；40% 组，对一个心律调整器的永久需要在(3.2%) 被要求病人和死亡在二被观察(6.4%) 在 TAVI 在以后的病人跟随 TAVI 能与 CA125 和 NT-proBNP 的高基线层次在病人有效地并且可靠地被执行的 *** 结果表演。当高 biomarker 层次与不希望得到的事件被联系时，这些 biomarkers 与 TAVI 实质地被减少，并且当然，这些 biomarkers 能为 TAVI 在耐心的选择被用于风险分类。

关键词：主动脉患者植入导管评价生物标志物水平划分 P值

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Plasma coenzyme Q10 levels in type 2 diabetic patients with retinopathy

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International Journal of Ophthalmology(English edition) 2013年第5期6卷 675-679页

作者： Orhan Ates Habip bilen Sadullah Keles H.Hakan Alp Mevlüt Sait Keles Kenan Yildirim Osman ndas L.Can Pinar Mustafa Civelekler Orhan Baykal Department of Ophthalmology Medical School of Ataturk University Department of Internal Medicine Division of Endocrinology and MetabolismSchool Medical of Ataturk University Department of Biochemistry Medical School of Ataturk University Department of Ophthalmology Etimesgut Military Hospital

AIMTo determine the relationship between proliferative diabetic retinopathy (PDRP) and plasma coenzyme Q10(CoQ10) concentration.

关键词： coenzyme Q10 diabetic retinopathy

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基于网格划分的无线传感器网络节点冗余分析

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东北石油大学学报 2013年第3期37卷 112-116,122页

作者：黄守志赵学增 bilen S G 张中华哈尔滨工业大学机电工程学院黑龙江哈尔滨150001 中国石油勘探开发研究院北京100083 Pennsylvania State University USA 16802 北京低碳清洁能源研究所北京102209

在无线传感器网络中,节点的大量随机部署导致冗余节点的存在,寻找冗余节点并使它定时休眠,可以减少网络冗余数据和信道拥塞、降低节点能耗,从而延长网络的生命周期.现有的CCP算法、圆周覆盖算法在去除冗余节点后网络产生覆盖盲区;基于Vo... 详细信息

在无线传感器网络中,节点的大量随机部署导致冗余节点的存在,寻找冗余节点并使它定时休眠,可以减少网络冗余数据和信道拥塞、降低节点能耗,从而延长网络的生命周期.现有的CCP算法、圆周覆盖算法在去除冗余节点后网络产生覆盖盲区;基于Voronoi图的算法计算量大且只能用于同构网络;节点时间表制定算法在判定过程中只考虑部分邻居节点,不能完全消除冗余节点.提出基于网格划分的冗余节点判定方法,并且将网格算法与EECRS协议结合,建立基于冗余节点消除的路由协议.仿真分析结果表明,网格算法冗余节点判定的准确性优于圆周覆盖算法和CCP算法的;网络生命周期比圆周覆盖算法的延长22.2%,比CCP算法的延长30.5%,该路由协议能够有效延长网络生命周期.

关键词：无线传感器网络冗余节点路由协议网络生命周期网格划分

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无线电未曾去过的地方

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科技纵览 2020年第8期 48-53,6页

作者： Sven bilen Dale Mortensen Richard Reinhart Alexander Wygllnski 宾夕法尼亚州立大学 NASA 马萨诸塞州伍斯特理工学院

太空仿佛是空旷无垠的,因此,似乎是无线电通信的理想环境。实际却并非如此,太空中有很多东西会干扰无线电通信。地球上变化不定的电离层会破坏卫星与地面站之间的链接。天线材料在受热和遇冷时会变形。在这个近乎真空的空间里,充满了被... 详细信息

太空仿佛是空旷无垠的,因此,似乎是无线电通信的理想环境。实际却并非如此,太空中有很多东西会干扰无线电通信。地球上变化不定的电离层会破坏卫星与地面站之间的链接。天线材料在受热和遇冷时会变形。在这个近乎真空的空间里,充满了被称为宇宙噪声的低等级环境无线电辐射,这些辐射来自遥远的类星体、太阳以及我们银河系的中心。

关键词：无线电通信宇宙噪声电离层类星体地面站辐射低等级银河系

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