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Effect of alkaline metal ions on the photoluminescence properties of Eu^(3+)-doped Ca_3Al_2O_6 phosphors

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Journal of Rare Earths 2016年第12期34卷 1193-1198页

作者： kyeongsoon Park Joon Woo Pi Deshmukh abdul hakeem Faculty of Nanotechnology and Advanced Materials Engineering Sejong University

Ca3–xAl2O6：x Eu^3＋（0.02≤x≤0.10） and Ca（2.92）Al2O6：0.04Eu^3＋,0.04M^＋（M^＋=Li^＋, Na^＋, and k^＋） phosphors were prepared by sol-gel method and their photoluminescence properties were investigated. The crystal structure of the annealed Ca3–xAl2O6：x Eu^3＋ and Ca（2.92）Al2O6：0.04Eu^3＋,0.04M^＋ phosphors was analyzed with X-ray diffraction（XRD）. The size and morphological characteristics of the annealed phosphors were investigated with a field emission scanning electron microscope（FE-SEM）. The photoluminescence properties were evaluated with a spectrofluorometer. The phosphors were effectively excited by the light of 396 nm and showed intense red emission at 616 nm, which originated from the 5D0→7F2 transition of Eu^3＋. Among the prepared phosphors, the Ca（2.96）Al2O6：0.04Eu^3＋ phosphor showed the strongest emission intensity and the highest color purity. The addition of alkaline metal ions（Li^＋, Na^＋, and k^＋） to Ca（2.96）Al2O6：0.04Eu^3＋ phosphor degraded the emission intensity and color purity.

关键词： phosphor photoluminescence emission sol-gel method Eu3+ rare earths

Effects of space and temperature dependent internal heat generation/absorption on MHD flow of a nanofluid over a stretching sheet

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Journal of Hydrodynamics 2015年第6期27卷 945-954页

作者： GANGA B. SARANYA S. VISHNU GANESH N. abdul hakeem A.k. Department of Mathematics Providence College for Women Department of Mathematics Sri Ramakrishna Mission Vidyalaya College of Arts and Science

In this paper we analyzed the effects of space and temperature dependent intemal heat generation/absorption （non-uniform heat source/sink） on magnetohydrodynamic boundary layer flow of water based nanofluid over a stretching sheet with different nanoparticles. The flow is generated due to linear stretching of the sheet and influenced by uniform magnetic field, which is applied normally to the stretching sheet. A scaling group of transformation is used to reduce the governing momentum and energy equations into non-linear ordinary differential equations. The resulting differential equations are solved analytically using hypergeometric functions and numerically by the fourth order Runge-kutta method with shooting technique. The influence of nanoparticle volume fraction, magnetic field, Prandtl number, non uniform heat source/sink, local skin friction coefficient and reduced Nusselt number are investigated for different nanoparticles.

关键词： nanofluid MHD heat generation/absorption stretching sheet

Liver transplantation as an alternative for the treatment of non-resectable liver colorectal cancer: Advancing the therapeutic algorithm

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Hepatobiliary & Pancreatic Diseases International 2024年第2期23卷 154-159页

作者： Badi Rawashdeh Richard Bell abdul hakeem Raj Prasad Division of Transplant Surgery Department of General SurgeryMedical College of WisconsinMilwaukeeWI53226USA Leeds Teaching Hospital LeedsUK

Colorectal cancer is a leading cause of cancerrelated mortality,with nearly half of the affected patients developing liver *** three decades,liver resection(LR)has been the primary curative strategy,yet its applicability is limited to about 20%of *** transplantation(LT)for unresectable metastases was attempted unsuccessfully in the 1990s,with high rates of perioperative death and *** is now more interest in this strategy due to improvements in systemic therapies and surgical techniques.A significant study conducted by the Oslo group showed that patients receiving liver transplants had a 60%chance of survival after five *** better results have been achieved by using advanced imaging for risk stratification and further refining selection criteria,especially in the Norvegian SECA *** review carefully charts the development and history of LT as a treatment option for colorectal cancer liver *** revolutionary path from the early days of exploratory surgery to the current situation of cautious optimism is traced,highlighting the critical clinical developments and improved patient selection standards that have made LT a potentially curative treatment for such challenging very well selected cases.

关键词： Liver transplantation Colorectal cancer liver metastases Non-resectable liver metastases

Thermospheric neutral wind studies over the equatorial region:A review

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Earth and Planetary Physics 2025年第1期9卷 81-100页

作者： Siti Syazwani Nasuha Idahwati Sarudin Nurul Shazana abdul Hamid Ahmad Fairuz Omar School of Physics Universiti Sains Malaysia11800 USMPulau PinangMalaysia Department of Applied Physics Faculty of Science and TechnologyUniversiti Kebangsaan Malaysia43600 UKM BangiSelangorMalaysia Space Science Centre(ANGkASA) Institute of Climate ChangesUniversiti Kebangsaan Malaysia43600 UKM BangiSelangorMalaysia

Thermospheric neutral winds(TNWs)refer to the neutral gases in the thermosphere circulating as tides,which play a crucial role in the dynamics of the thermosphere-ionosphere system(TIS).Global geospace neutral winds,particularly over the magnetic equator,have been a subject of study for several ***,despite the known importance of neutral winds,a comprehensive understanding and characterization of the winds is still *** ground-based and satellite missions have provided valuable information on the contribution of neutral winds to the global atmospheric ***,efforts in the global monitoring of neutral winds are still lacking,and the drivers behind the behavior of TNWs as well as their influence on the TIS remain *** address these knowledge gaps in the global circulation of TNWs,it is crucial to develop a deep understanding of the neutral wind characteristics over different *** low-latitude equatorial region in particular has been observed to exert complex influences on TNWs because of the unique effects of the Earth’s magnetic field at the dip *** neutral winds over this region will provide valuable insights into the unique dynamics and processes that occur in this region,thereby enhancing our understanding of their role in the overall dynamics of the ***,through empirical observations,an improved ability to accurately model and predict the behavior of this region can be *** review article addresses challenges in understanding equatorial winds by reviewing historical measurements,current missions,and the interactions of ionospheric and thermospheric phenomena,emphasizing the need for comprehensive measurements to improve global atmospheric dynamics and weather forecasting.

关键词： thermospheric neutral wind thermosphere-ionosphere system dip equator equatorial region

Application of Alkaline Electrolytic Water on the Removal of Pesticide Residues and Improvement of the Quality of Cherry Tomato

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Application of Alkaline Electrolytic Water on the Removal of...

作者： abdul hakeem 西南科技大学

学位级别：硕士

化学农药在自然生态系统中浓度的迅速增加造成了农业土地和农产品的污染,这些污染通过食物链传播,并造成许多健康问题。使用碱性电解水是果蔬除农残的一种重要方法。本研究所用碱性电解水的p H为13.5,ORP为1200MV-900MV。本研究的主要... 详细信息

化学农药在自然生态系统中浓度的迅速增加造成了农业土地和农产品的污染,这些污染通过食物链传播,并造成许多健康问题。使用碱性电解水是果蔬除农残的一种重要方法。本研究所用碱性电解水的p H为13.5,ORP为1200MV-900MV。本研究的主要目的是利用碱性电解水去除果蔬中的农药残留,以及在生产过程中喷施碱性电解水来提高农产品的质量。试验研究了西蓝花（和辣椒）在采收前以及采收后喷施碱性电解水的除农残效果;对比了碱性电解水处理、自来水处理、盐水处理、小苏打水处理和洗涤剂处理,五种方式除农残效果;优化了碱性电解水除农残的处理时间,以及明确了碱性电解水是否能进行重复使用等问题。试验进一步研究在樱桃番茄的生产过程中喷施碱性电解水对植物氧化应激指标“丙二醛”含量的影响,并测定了番茄的单果重、糖含量、维生素C和β-胡萝卜素的含量,从而较系统的研究了在樱桃番茄生产过程中喷施碱性电解水对樱桃番茄品质的影响。试验结果表明:采收前和采收后施用碱性电解水能有效的降低农残;5种除农残效果的大小为:碱性电解水＞洗涤剂＞小苏打水＞食盐水＞自来水;喷雾处理和浸泡处理作为2种利用碱性电解水除农残的方式,均在处理2分钟后具有最佳的除农残效果;在利用碱性电解水除农残过程中,碱性电解水可以连续重复利用。在樱桃番茄的生产过程中,喷施碱性电解水能有效的降低植物氧化应激指标“丙二醛”的含量;喷施碱性电解水能有效的提高樱桃番茄的单果重、糖含量、维生素C和β-胡萝卜素的含量,从而有效的提高樱桃番茄的品质。综上所述,在农产品生产过程中应用碱性电解水,可以有效去除各种果蔬中的农药残留,同时提高蔬菜的品质。碱性电解水在蔬菜的生产过程中具有广阔的应用前景。

关键词：碱性电解水除农残蔬菜品质维生素糖含量单果重

Simulation of snowmelt-runoff under climate change scenarios in a data-scarce mountain environment

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International Journal of Digital Earth 2019年第8期12卷 910-930页

作者： Adnan Ahmad Tahir Samreen abdul hakeem Tiesong Hu Huma Hayat Muhammad Yasir Department of Environmental Sciences COMSATS Institute of Information TechnologyAbbottabadPakistan State key Laboratory of Water Resources and Hydropower Engineering Sciences Wuhan UniversityWuhanPeople’s Republic of China

Pakistan is an agriculture-based economy and major proportion of irrigation water for its cultivated lands is abstracted from the Upper Indus Basin(UIB).UIB water supplies are mostly contributed from the high-altitude snow and glacier fields situated in the Hindukush–karakoram–Himalayan *** change in the flows of these river catchments due to climate variability may result in the form of catastrophic events like floods and droughts and hence will adversely affect the economy of *** study aims to simulate snowmelt runoff in a mountainous sub-catchment(Shyok River basin)of the UIB under climate change *** Runoff Model(SRM)coupled with remotely sensed snow cover product(MOD10A2)is used to simulate the snowmelt runoff under current and future climate scenarios in the study *** results indicate that(a)SRM has efficiently simulated the flow in Shyok River with average Nash–Sutcliff coefficient value(R2)of 0.8(0.63–0.93)for all six years(2000–2006)of basin-wide and zone-wise simulations,(b)an increase of 10%(by 2050)and 20%(by 2075)in SCA will result in a flow rise of∼11%and∼20%,respectively,and(c)an increase of 1℃(by 2025),2℃(by 2050),3℃(by 2075)and 4℃(by 2100)in mean temperature will result in a flow rise of∼26%,∼54%,∼81%and∼118%,*** study suggests that SRM equipped with remotely sensed snow cover data is an effective tool to estimate snowmelt runoff in high mountain data-scarce environments.

关键词： Upper Indus Basin(UIB) Shyok River basin MOD10A2 Snowmelt Runoff Model(SRM) climate change

Inguinodynia following Lichtenstein tension-free hernia repair:A review

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World Journal of Gastroenterology 2011年第14期17卷 1791-1796页

作者： abdul hakeem Venkatesh Shanmugam Department of General Surgery Aintree University Hospital NHS TrustLiverpoolL9 7ALUnited Kingdom Department of General and Colorectal Surgery Nottingham University Hospital NHS TrustNottinghamshireNG7 2UHUnited Kingdom

Chronic Groin Pain (Inguinodynia) following inguinal hernia repair is a significant,though under-reported problem. Mild pain lasting for a few days is common following mesh inguinal hernia repair. However,moderate to severe pain persisting more than 3 mo after inguinal herniorrhaphy should be considered as pathological. The major reasons for chronic groin pain have been identified as neuropathic cause due to inguinal nerve(s) damage or non-neuropathic cause due to mesh or other related factors. The symptom complex of chronic groin pain varies from a dull ache to sharp shooting pain along the distribution of inguinal nerves. Thorough history and meticulous clinical examination should be performed to identify the exact cause of chronic groin pain,as there is no single test to confirm the aetiology behind the pain or to point out the exact nerve involved. Various studies have been performed to look at the difference in chronic groin pain rates with the use of mesh vs non-mesh repair,use of heavyweight vs lightweight mesh and mesh fixation with sutures vs glue. Though there is no convincing evidence favouring one over the other,lightweight meshes are generally preferred because of their lesser foreign body reaction and better tolerance by the patients. Identification of all three nerves has been shown to be an important factor in reducing chronic groin pain,though there are no well conducted randomised studies to recommend the benefits of nerve excision vs preservation. Both nonsurgical and surgical options have been tried for chronic groin pain,with their consequent risks of analgesic sideeffects,recurrent pain,recurrent hernia and significant sensory loss. By far the best treatment for chronic groin pain is to avoid bestowing this on the patient by careful intra-operative handling of inguinal structures and better patient counselling pre-and post-herniorraphy.

关键词： Hernia Lichtenstein repair Chronic groin pain Inguinodynia Mesh hernia repair Ilio-inguinal nerve Iliohypogastic nerve Genitofemoral nerve

A matched-pair analysis of laparoscopic versus open pancreaticoduodenectomy: oncological outcomes using Leeds Pathology Protocol

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Hepatobiliary & Pancreatic Diseases International 2014年第4期13卷 435-441页

作者： abdul R hakeem Caroline S Verbeke Alison Cairns Amer Aldouri Andrew M Smith krishna V Menon Department of HPB and Transplant Surgery St James's University Hospital NHS TrustLeeds Teaching Hospitals Beckett street Leeds LS9 7TF United Kingdom Division of Pathology Department of Laboratory Medicine Karolinska Institutet Stockholm Sweden Department of Histopathology St James's University Hospital NHS TrustLeeds Teaching Hospitals Beckett street Leeds LS9 7TF United Kingdom

BACkGROUND： Laparoscopic pancreaticoduodenectomy（LPD）is a safe procedure. Oncological safety of LPD is still a matter for debate. This study aimed to compare the oncological outcomes,in terms of adequacy of resection and recurrence rate following LPD and open pancreaticoduodenectomy（OPD）.METHODS： Between November 2005 and April 2009, 12LPDs（9 ampullary and 3 distal common bile duct tumors）were performed. A cohort of 12 OPDs were matched for age,gender, body mass index（BMI） and American Society of Anesthesiologists（ASA） score and tumor ***： Mean tumor size LPD vs OPD（19.8 vs 19.2 mm,P=0.870）. R0 resection was achieved in 9 LPD vs 8 OPD（P=1.000）. The mean number of metastatic lymph nodes and total number resected for LPD vs OPD were 1.1 vs 2.1（P=0.140）and 20.7 vs 18.5（P=0.534） respectively. Clavien complications grade I/II（5 vs 8）, III/IV（2 vs 6） and pancreatic leak（2 vs 1）were statistically not significant（LPD vs OPD）. The mean high dependency unit（HDU） stay was longer in OPD（3.7 vs 1.4 days,P〈0.001）. There were 2 recurrences each in LPD and OPD（logrank,P=0.983）. Overall mortality for LPD vs OPD was 3 vs 6（log-rank, P=0.283） and recurrence-related mortality was 2 vs *** was one death within 30 days in the OPD group secondary to severe sepsis and none in the LPD ***： Compared to open procedure, LPD achieved a similar rate of R0 resection, lymph node harvest and longterm recurrence for tumors less than 2 cm. Though technically challenging, LPD is safe and does not compromise oncological outcome.

关键词： pancreaticoduodenectomy minimally invasive laparoscopic open oncological outcomes resection margins pathology

Magnetotelluric Constraints on the Occurrence of Lower Crustal Earthquakes in the Intra-plate Setting of Central Indian Tectonic Zone

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Acta Geologica Sinica(English Edition) 2016年第3期90卷 884-899页

作者： k.k.abdul AZEEZ CSIR-National Geophysical Research Institute Uppal Road Hyderabad 500007 India

Lower crustal earthquake occurrence in the Central Indian Tectonic Zone （CITZ） of the Indian sub-continent was investigated using magnetotelluric （MT） data. MT models across the CITZ, including the new resistivity model across the 1938 Satpura lower crustal earthquake epicenter, show low resistive （〈80 Ωm） mid-lower crust and infer small volume （〈1 vol%） of aqueous fluids existing in most part of lower crust. This in conjunction with xenoliths and other geophysical data supports a predominant brittle/semi-brittle lower crustal theology. However, the local deep crustal zones with higher fluid content of 2.2%-6.5% which have been mapped imply high pore pressure conditions. The observation above and the significant strain rate in the region provide favorable conditions （strong/ moderate rock strength, moderate temperature, high pore pressure and high strain rate） for brittle failure in the lower crust. It can be inferred that the fluid-rich pockets in the mid-lower crust might have catalyzed earthquake generation by acting as the source of local stress （fluid pressure）, which together with the regional stress produced critical seismogenic stress conditions. Alternatively, fluids reduce the shear strength of the rocks to favor tectonic stress concentration that can be transferred to seismogenic faults to trigger earthquakes.

关键词： Resistivity fluids lower crustal earthquake intra-plate Central Indian Tectonic Zone