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Resolution Enhancement of Optical Surface Plasmon Resonance Sensor Using Metamaterial

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Photonic Sensors 2015年第4期5卷 330-338页

作者： Sarika PAL Y. K. PRAJAPATI J. P. saini V. SINGH Sarika Pal Department of Electronics & Communication Engineering KIET Ghaziabad (U.P.) India yogendra Kumar Prajapati Department of Electronics & Communication Engineering MNNIT Allahabad-211004 (U.P.) India jai Prakash saini Department of Electronics & Communication Engineering BIET Jhansi-284128 (U.P.) India Vivek Singh Department of Physics Faculty of Science Banaras Hindu University Varanasi (U.P.) India

In this paper, we present and discuss a an optical surface plasmon resonance （SPR） path to extend the enhancement of the resolution of sensor. Basically, our approach is to combine bi-metamaterial layers to design the SPR sensor. The calculation shows that the proposed SPR sensor structure has a preference over the conventional SPR sensors and bimetallic SPR sensors since it gives a much sharper reflectance dip and can achieve considerable sensitivity improvement when compared to the recently reported investigations. The effects of the metamaterial permittivity, permeability, and thickness on the reflectance curve are studied. It is also seen that metamaterial layers improve the field of the proposed SPR structure, which may provide a novel tool to significantly enhance the sensitivity and resolution of the sensors.

关键词： Surface plasmon resonance sensor metamaterials Fresnel equations reflectance

Current trends of antibiotic resistance in clinical isolates of Staphylococcus aureus

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Frontiers in Biology 2014年第4期9卷 287-290页

作者： Kapil Dev SHARMA Rajendra Prasad saini Loganathan KARTHIK Dhanwantri Hospital and Research Centre Jaipur Rajasthan India Department ofBiosciences Shri Jagdishprasad Jhabarmal Tibrewala University Jhunjhunu Rajasthan 333 001 India

Staphyloccus aureus （S. aureus） is a well known human pathogen known to causes a verity of infections in humans. In recent years S. aureus is reported to show drug resistant toward commonly known drugs. Therefore, this study was designed to study the pattern of antibiotic resistance in 50 clinical isolates ofS. aureus isolated at Dhanwantri Hospital and Research Centre, Jaipur, Rajasthan, India. S. aureus cultures were isolated from different clinical samples, pus, throat swabs and urine on Blood agar and MacConkey agar and Chrom agar plats and characterized by an array of microscopic and biochemical tests. Antibiotic sensitivity test was performed by standard disc diffusion method （Kirby bayer＇s method） on Muller Hinton agar plates. During this study, among 50 S. aureus isolates 48 （96%） were found to be resistance toward Aztreonam and Doxicycline followed by Ciprofloxacin （n = 45, 90%）, Cefpodoxime and Ceftazidime （n = 44, 88%）, Cefuroxime （n = 40, 80%）, Pipracillin ＋ Tazobactum （n = 38, 76%）, Cefoparazone （n = 36, 72%）, Amoxicillin ＋ Clavulanic acid and Ceftriaxone （n = 33, 66%）, Levofloxacin （n = 32, 64%）, Moxifloxacin （n = 31, 62%）, Ofloaxacin （n = 25, 50%）, Cloxacillin （n = 22, 44%）, Azithromycin （n = 21, 42%）, Clindamycin （n = 19, 38%）, Meropenem （n = 18, 36%）, Clarithromycin （n = 16, 32%）, Ampicillin ＋ sulbactam （n = 13, 26%）, Amikacin （n = 12, 24%）, Impipenem （n = 8, 16%）, Linezolid and Methicillin （n = 7, 14%） and Teicoplanin （n = 3, 6%）. In conclusion, the isolated S. aureus found to be resistant toward common antibiotics, however all isolates were found to be susceptible to Vancomycin.

关键词： Staphyloccus aureus infections antibiotic resistance

Microwave Irradiated Cross Coupling of Carboxylic Acids and Crotyl Bromides: Efficient Application to Make Arachidonic Acid Esters

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International Journal of Organic Chemistry 2018年第4期8卷 341-348页

作者： Mohammad Al-masum Arpona Hira Department of Chemistry Tennessee State University Nashville USA

A microwave irradiated palladium-catalyzed reaction of carboxylic acids and crotyl type bromides creates series of esters in good to high yields. This facile ester synthesis then is applied to make esters from arachid... 详细信息

关键词： Arachidonic Acid Esters by Cross Coupling Microwave

High day and night temperatures impact on cotton yield and quality——current status and future research direction

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棉花研究(英文) 2023年第3期6卷 209-225页

作者： saini Dinesh K. IMPA S.M. MCCALLISTER Donna PATIL Gunvant B. ABIDI Noureddine RITCHIE Glen JACONIS S.Y. JAGADISH Krishna S.V. Department of Plant and Soil Science Texas Tech UniversityLubbockTX 79410USA Department of Agricultural and Applied Economics Texas Tech UniversityLubbockTX 79410USA Institute of Genomics for Crop Abiotic Stress Tolerance Texas Tech UniversityLubbockTX 79410USA Fiber and Biopolymer Research Institute Texas Tech UniversityLubbockTX 79410USA Cotton Incorporated CaryNC 27513USA

Heat waves,and an increased number of warm days and nights,have become more prevalent in major agricultural regions of the *** well adapted to semi-arid regions,cotton is vulnerable to high temperatures,particularly during flowering and boll *** maintain lint yield potential without compromising its quality under high-temperature stress,it is essential to understand the effects of heat stress on various stages of plant growth and development,and associated tolerance *** ongoing efforts to gather data on the effects of heat stress on cotton growth and development,there remains a critical gap in understanding the distinct influence of high temperatures during the day and night on cotton yield and ***,identifying mechanisms and target traits that induce greater high day and night temperature tolerance is essential for breeding climate-resilient cotton for future uncertain *** bridge these knowledge gaps,we embarked on a rigorous and comprehensive review of published literature,delving into the impact of heat stress on cotton yields and the consequential losses in fiber *** review encompasses information on the effects of heat stress on growth,physiological,and biochemical responses,fertilization,cotton yield,and ***,we discuss management options for minimizing heat stress-induced damage,and the benefits of integrating conventional and genomics-assisted breeding for developing heat-tolerant cotton ***,future research areas that need to be addressed to develop heat-resilient cotton are proposed.

关键词： Controlled environment Cotton Fiber yield and quality Heat stress Heat tents Reproductive failure

Microwave Irradiated Palladium-Catalyzed Cascade Type Cross Coupling of Phenols and Halides for the Synthesis of Polyphenolic Ethers

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International Journal of Organic Chemistry 2020年第4期10卷 135-143页

作者： Mohammad Al-masum Houra A. Alalwan Department of Chemistry Tennessee State University Nashville TN USA

A mild, cascade type methodology was developed for the synthesis of polyphenolic ethers by the palladium-catalyzed cross coupling of phenols and halo compounds under microwave heating. In most cases, reactions run in neat conditions and in some cases, IPA/water mixture, and 1,4-dioxane were employed as solvents to furnish the products. By applying this new method, we were able to synthesize and purify a good number of polyether compounds with complete spectral data.

关键词： Polyphenolic Ether Cross-Coupling Cascade Type Reaction Microwave Heating

The Gondwana Orogeny in northern North Patagonian Massif:Evidences from the Caita Có granite, La Se?a and Pangaré mylonites,Argentina

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Geoscience Frontiers 2016年第4期7卷 621-638页

作者： Daniel A.Gregori Bernhardt saini-Eidukat Leonardo Benedini Leonardo Strazzere Mercedes Barros José Kostadinoff Cátedra de Geología Argentina Departamento de Geología Universidad Nacional del Sur and INGEOSUR Department of Geosciences North Dakota State University Cátedra de Campos Gravitacionales Departamento de Física Universidad Nacional del Sur

Structural analyses in the northern part of the North Patagonia Massif, in the foliated Caita Co granite and in La Sefia and Pangare mylonites, indicate that the pluton was intruded as a sheet-like body into an opening pull-apart structure during the Gondwana Orogeny. Geochronological studies in the massif indicate a first, lower to middle Permian stage of regional deformation, related to movements during indentation tectonics, with emplacement of foliated granites in the western and central areas of the North Patagonian Massif. Between the upper Permian and lower Triassic, evidence indicates emplacement of undeformed granitic bodies in the central part of the North Patagonian Massif. A second pulse of deformation between the middle and upper Triassic is related to the emplacement of the Caita CO granite, the development of mylonitic belts, and the opening of the Los Menucos Basin. During this pulse of deformation, compression direction was from the eastern quadrant.

关键词： Gondwana Orogeny Northern Patagonia Foliated granite Mylonites Argentina

Tectonics induced switching of provenance during the Late Quaternary aggradation of the Indus River Valley, Ladakh, India

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Geoscience Frontiers 2019年第1期10卷 285-297页

作者： Ravish Lal H.S.saini N.C.Pant S.A.I.Mujtaba Department of Geology University of Delhi Geological Survey of India

The Indus River flows through Ladakh, one of the driest and coldest places on earth, in a tectonically active domain. Fluvial, glaciofluvial, lacustrine and debris dominated sequences represent the Late Quaternary sedimentary record along the river course. Karakoram Fault, a major crustal scaled feature reported to be active during the Quaternary, is associated with the Indus River drainage. Linkages between a major, active fault and deposits formed during the activity period of the fault are explored using heavy mineral deduced provenance and Optically Stimulated Luminescence(OSL) *** deposits in a ~200 km long stretch of the Indus River have been examined for a ~80 ka period to decipher the climate linked aggradation history. Damming of the Indus River at ~79 ka and existence of the Spituk Lake for >30 ka is demonstrated. Using geology of the provenance in relation to the mineralogical attributes of the Quaternary deposits, the major drainage reorganization when the connection of the Tangtse Valley to the Indus was blocked, is inferred at ~73 ka. It is supported by the geologicalgeomorphological evidence. The study demonstrates the application of provenance linked mineralogy in terrestrial aggradation in a tectonically active region.

关键词： Karakoram Fault Indus Drainage reorganization Heavy minerals Aggradation

Reconstruction of chronic acromioclavicular joint disruption with artificial ligament prosthesis

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Chinese Journal of Traumatology 2013年第4期16卷 216-220页

作者： Devendra Kumar Chouhan Uttam Chand saini Mandeep Singh Dhillon Department of Orthopaedics Post Graduate Instituteof Medical Education & Research Sector 12 Chandigarh160012 India

Rockwood 类型 3 acromioclavicular 混乱的 ObjectiveManagement 是争论的一件事。我们起初应该采用保守或起作用的措施表示吗？它不是清楚的，但是大多数证据赞成保守管理。我们在场我们在管理长期的 Rockwood 类型 3 acromioclavicul... 详细信息

Rockwood 类型 3 acromioclavicular 混乱的 ObjectiveManagement 是争论的一件事。我们起初应该采用保守或起作用的措施表示吗？它不是清楚的，但是大多数证据赞成保守管理。我们在场我们在管理长期的 Rockwood 类型 3 acromioclavicular 关节混乱的八个盒子的一个未来的系列通过手术对待的在场的这些病人 *** 的经验。coracoclavicular 系带的解剖重建被病人是的人工的编织聚酯系带 *** 做能从第 14 手术后的天的一般水准执行每日的活动。所有病人疼痛地感到了改进，与在平均视觉类似物规模从的减少外科手术前到 2.0 个点(范围 0-5 点) 的 6.5 个点(范围 3-9 点) ，从 59% ～ 91% 的经常的分数和美国肩膀和肘外科医生手术后地从 65 ～ 93 个点承担 20。改进或至少在中间的后续上仍然保持静止的这些结果，和没有恶化在人工的系带修复术的 46 *** 期中考试结果分析的平均后续被记录是有修复术的第一如此的后续研究。我们的结果是令人鼓舞的并且认为这种相对新、容易可再现的技术的进一步的使用和评估正当。

关键词：人工关节假体韧带慢性锁手术治疗视觉模拟

Detection of Leptospirosis Bacteria in Rodent Urine by Surface Plasmon Resonance Sensor Using Graphene

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Photonic Sensors 2021年第3期11卷 305-313页

作者： Surjeet Raikwar Y.K.Prajapati D.K.Srivastava J.B.Maurya J.P.saini Department of Electronics and Communication Engineering Bundelkhand Institute of Engineering and TechnologyJhansiUttar Pradesh284128India Department of Electronics and Communication Engineering Motilal Nehru National Institute of Technology AllahabadPrayagrajUttar Pradesh211004India Netaji Subhas University of Technology DwarkaNew Delhi110078India

In this paper, a graphene-coated surface plasmon resonance sensor is designed for the examination of Rodent urine which is responsible for Leptospirosis bacteria. Rodent urine is considered as sensing medium. Graphene surface is activated by phosphate-buffered saline solution for better attachment of Leptospirosis bacteria on its surface. Oliguria and Polyuria are the Rodent urine with high and low concentrations of Leptospirosis bacteria, respectively. The transfer matrix method is used for the formulation of reflection intensity of p-polarized light. The reflectance curves for angular interrogation are plotted and the results are obtained in terms of sensitivity, detection accuracy, and quality factor. The significantly high sensitivity and detection accuracy for Oliguria distinguishes it from Polyuria having lower sensitivity.

关键词： Surface plasmon resonance sensor active metal layer Leptospirosis bacteria