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American Journal of Analytical Chemistry 2011年第4期2卷 401-410页

作者： satheesh kumar shetty K.V Surendranath P Radhakrishnanand Roshan M Borkar Prashant S Devrukhakar Johnson Jogul Upendra Mani Tripathi United States Pharmacopeia-India Private Limited Research and Development Laboratory ICICI Knowledge Park Turkapally Shameerpet Hyderabad India

A novel, sensitive and precise UHPLC method has been developed and validated for the simultaneous determination of the all the active components of a Polypill viz Zycad, i.e., Aspirin (ASP) Atorvastatin (ATV), Ramipril (RMP) and Metoprolol (MTP) in Zycad tablet dosage form in the presence of degradation products. Forced degradation of individual as well as combination of all the drug substances components of Polypill was conducted in accordance with ICH guidelines. Acidic, basic, neutral, and oxidative hydrolysis, thermal stress, and photolytic degradation were used to assess the stability-indicating power of the method. Use of 100 × 2.1 mm, 1.7 μm stationary phases with simple mobile phase combination buffer consisting of 0.1% Perchloric acid (adjusted to pH 2.5) and Acetonitrile, delivered in a gradient mode and quantitation was carried out using ultraviolet detection at 215 nm with a flow rate of 0.6 mL?min–1. The method was optimized using samples generated by forced degradation studies. The method was validated for linearity, accuracy (recovery), precision, Specificity and robustness. The method was linear in the range of 37.5 to 150.0 μg?mL–1 for ASP, 5.0 to 20.0 μg?mL–1 for ATV and 2.5 to 10.0 μg?mL–1 for RMP and 25.0 to 100.0 μg?mL–1 for MTP.

关键词： Liquid Chromatography UHPLC Polypill Aspirin Atorvastatin Ramipril And Metoprolol Succinate Forced Degradation Validation Stability Indicating

Recent advances in RNA-targeting therapy for neurological diseases

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Neural Regeneration Research 2023年第12期18卷 2663-2664页

作者： satheesh kumar Guei-Sheung Liu Center for Eye Research Australia Royal Victorian Eye and Ear HospitalEast MelbourneVICAustralia Menzies Institute for Medical Research University of TasmaniaHobartTASAustralia Ophthalmology Department of SurgeryUniversity of MelbourneEast MelbourneVICAustralia Aier Eye Institute ChangshaHunan ProvinceChina

Advances in sequencing and molecular technology now allow us to understand the genetic underpinnings of complex diseases such as neurological *** variations(or mutations) in the DNA sequence of single genes have been implicated in neurological diseases such as Huntington's disease and spinal muscular *** a result,the development of gene therapies for neurological diseases is now a feasible endeavor.

关键词： diseases neurological Huntington

Inspection strategies for quality products withrewards in a multi-stage production

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Journal of Control and Decision 2023年第4期10卷 596-609页

作者： R.satheesh kumar A.Nagarajan Department of Mathematics PSNA College of Engineering and TechnologyDindigulIndia

In a multi-stage manufacturing system,defective components are generated due to deteriorating machine parts and failure to install the feed *** these circumstances,the system requires inspection counters to distinguish imperfect items and takes a few discreet decisions to produce impeccable *** the prioritisation of employee appreciation and working on reward is one of the important policies to improve *** we look at the multistage manufacturing system as an M/PH/1 queue model and rewards are given for using certain inspection strategies to produce the quality items.A matrix analytical method is proposed to explain a continuous-time Markov process in which the reward points are given to the strategy of inspection in each state of the *** constructing the value functions of this dynamic programming model,we derive the optimal policy and the optimal average reward of the entire system in the long *** addition,we obtain the percentage of time spent on each system state for the probability of conformity and non-conformity of the product over the long *** results of our computational experiments and case study suggest that the average reward increases due to the actions are taken at each decision epoch for rework and disposal of the non-conformity items.

关键词： Sequential process infinitesimal operator Markov decision processes value function optimal policy optimal average reward

Corrosion,mechanical and microstructural properties of aluminum 7075-carbon nanotube nanocomposites for robots in corrosive environments

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International Journal of Minerals,Metallurgy and Materials 2023年第6期30卷 1140-1151页

作者： Arun David satheesh kumar Gopal Poovazhagan Lakshmanan Amith Sukumaran Chenbagam Sri Sivasubramaniya Nadar College of Engineering KalavakkamChennai-603110India

The introduction of in-pipe robots for sewage cleaning provides researchers with new options for pipe inspection,such as leakage,crack,gas,and corrosion detection,which are standard applications common in the current industrial *** question that is frequently overlooked in all these cases is the inherent resistance of the robots to *** mechanical,microstructural,and corrosion properties of aluminum 7075 incorporated with various weight percentages(0,0.5wt%,1wt%,and 1.5wt%)of carbon nanotubes(CNTs)are *** is fabricated using a rotational ultrasonication with mechanical stirring(RUMS)-based casting method for improved corrosion resistance without compromising the mechanical properties of the robot.1wt%CNTs-aluminum nanocomposite shows good corrosion and mechanical properties,meeting the requirements imposed by the sewage environment of the robot.

关键词： aluminum 7075 carbon nanotubes rotational ultrasonication with mechanical stirring mechanical characterization microstructure robot

Implementation of High-Q Embedded Band Pass Filter in Wireless Communication

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Intelligent Automation & Soft Computing 2023年第5期36卷 2191-2200页

作者： V.satheesh kumar S.Ramesh Department of Electronics and Communication Engineering T.J.S Engineering CollegeChennaiTamilNadu601206India Valliammai Engineering College ChennaiTamil Nadu603203India

At 12.8 MHz center frequency,the advanced miniaturized polymer-based planar high quality factor(Q)passive elements embedded bandpassﬁlter works in the *** most of the demands operate inside the spectrum,the wideband or high-speed operation necessary to enhance must be acquired in microwave frequency *** channel has a quiet,high-performance micro-ﬁlter with wideband *** and inductors are used in the high quality factor(Q)passive components,and related networks are incorporated in theﬁ*** layers are concatenated using Three-Dimensional Integrated Circuit(3D-IC)integration,parasitics are removed,and interconnection losses are negotiated using de-embedding methods.A wireless application-based Liquid Crystalline Polymer(LCP)viewpoint is employed as a substrate material in this *** polymer processes,their properties,and the incorporated high-Q Band Pass Filter *** suggestedﬁlter model is computed and manufactured utilizing the L-band frequency spectrum,decreasing total physical length by 31%while increasing bandwidth by 45%.

关键词： Bandpassﬁlter wireless communication frequency spectrum embedded technology

On some aspects of a bivariate alternative zero-inflated logarithmic series distribution

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Statistical Theory and Related Fields 2023年第2期7卷 130-143页

作者： C.satheesh kumar A.Riyaz Department of Statistics University of KeralaTrivandrumKeralaIndia

In this paper,we discuss some important aspects of the bivariate alternative zero inflated log-arithmic series distribution(BAZILSD)of which the marginals are the alternative zero-inflated logarithmic series ditributions of kumar and Riyaz(*** alternative version of zero-inflated logarithmic series distribution and some of its *** of Statistical Computation and Simulation,85(6),1117-1127).We study some important properties of the distribution by deriving expressions for its probability mass function,factorial moments,conditional probabil-ity generating functions,and recursion formulae for its probilities,raw moments and factorial *** parameters of the BAZILSD are estimated by the method of maximum likelihood and certain test procedures are also *** certain real-life data applications are cited for ilustrating the usefulness of the model.A simulation study is conducted for assessing the performance of the maximum likelihood estimators of the parameters of the BAZILSD.

关键词： Factorial moments generalized lkeliood ratio test probability generating function Rao's score test zero-inflated distributions

Organometallic L-Alanine Cadmium Iodide Crystals for Optical Device Fabrication

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Journal of Electronic Science and Technology 2022年第4期20卷 345-355页

作者： Kathiravan Vaiyapuri Thangavel Subramani Ashok kumar Rajamani Muthu Lakshmi Thangavel satheesh kumar Ganesan Selvarajan Palanisamy kumaresavanji Malaivelusamy Crystal Growth Laboratory PG and Research Department of PhysicsGovernment Arts College(Autonomous)Karur 639005 PG and Research Department of Physics Thiruvalluvar Government Arts CollegeRasipuram 637401 PG and Research Department of Physics Jairam College of Arts and ScienceKarur 639003 PG and Research Department of Physics National College(Autonomous)Tiruchirappalli 620001 Department of Physics Aditanar College of Arts and ScienceTiruchendur 628216

Single crystals of L-alanine cadmium iodide(LACI)were grown by the slow evaporation technique at room temperature.A single-crystal X-ray diffraction(SXRD)model was used to evaluate the crystal structure of the as-grown LACI *** energy dispersive X-ray(EDX)analysis and ultraviolet-visible-near infrared(UV-vis-NIR)transmittance studies were carried out,and the results reveal the presence of elements in the title *** the transmittance data,the optical bandgap as a function of photon energy was estimated,and the different optical constants were calculated.A fluorescence study was performed for the LACI *** and differential thermal analyses have also been studied to investigate the thermal property of the LACI *** efficiency of the second harmonic generation(SHG)of the title crystal was *** magnetic and electrical properties were estimated by the vibrating sample magnetometer(VSM)analysis and impedance study,respectively.

关键词： Fluorescence impedance thermal analysis vibrating sample magnetometer(VSM) X-ray diffraction

Role of monovalent co-dopants on the PL emission properties of YAl_3(BO_3)_4:Ce^(3+) phosphor

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Journal of Rare Earths 2014年第10期32卷 927-932页

作者： R.satheesh kumar V.Ponnusamy V.Sivakumar M.T.Jose Department of Physics Anna UniversityM.I.T. Campus Research and Development Laboratory Department of PhysicsSaveetha Engineering College Radiological Sefety Division Indira Gandhi Centre for Atomic Research

The cerium （Ce3＋） doped yttrium aluminium borate （YAB） phosphor was synthesized by modified solid state reaction. The phosphor＇s phase purity and its emission properties were studied using powder X-ray diffraction pattern and photoluminescence spectroscopy. The synthesized YAB had rhomobohedral crystal structure. The phosphor had two different excitation and emission spectra. By 325 nm excitation, the phosphor had emission at 373 nm and with 363 nm excitation; the phosphor gave violet-blue emission at 418 nm. The UV emission of the phosphor originated due to Ce3＋ ions at the yttrium site and violet-blue emission owing to Ce3＋ ions at non-regular sites viz., A13＋ and interstitial sites. The emission intensity of the phosphor was enhanced when monovalent ions （K＋, Na＋, and F） were added as co-dopants. The crucial role of ionic radii of monovalent co-dopants on the emission enhancement of the YAB：Ce3＋ phosphor was reported. Thermogravimetric study showed that the YAB possessed high thermal stability at up to 900 ℃.

关键词： yttrium aluminium borate cerium monovalent codopants ionic radii thermogravimetric analysis rare earths

Comparative study of haematological,serum electrolyte and nonelectrolyte parameters of male and female Persian sturgeon(Acipenser persicus)brood stocks

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Acta Oceanologica Sinica 2016年第8期35卷 39-43页

作者： ADEL Milad PALANISAMY satheesh kumar SHAFIEI Shafigh FAZLI Hasan ZORRIEHZAHRA Mohammad Jalil Department of Aquatic Animal Health and Diseases Iranian Fisheries Science Research Institute(IFSRI)Agricultural Research Education and Extension Organization(AREEO)Tehran 13185-116Iran Department of Chemistry BiologicalPharmaceutical and Environmental ScienceUniversity of MessinaMessinaItaly Department of Aquatic Animal Health and Diseases Faculty of Veterinary MedicineUniversity of TehranTehran 14155-6453Iran Caspian Sea Ecological Research Institute Khazarabad BoolvarSari 961Iran

Sturgeons are the most important principal market species in the Caspian Sea. In the present study, measurement of blood parameters was carried out with the aim of evaluating the normal value of hematological and serum biochemical parameters of brood stocks Acipenser persicus during spawning season. Blood samples were collected from 36 brood stocks of A. persicus（18 males and 18 females） during the spawning season. Higher value of red blood cells, white blood cells, haemoglobin, haematocrit was observed in male breeders with significant differences between female breeders（p〉0.05）. Haemoglobin and haematocrit value in this study was within the range of 8.70 to 9.2 g/d L and 29.73% to 30.26%, respectively. The statistically significant differences between mean corpuscular volumes, mean corpuscular haemoglobin, lymphocyte and neutrophil percentages, aspartate aminotransferase, alkaline phosphatase and creatine kinase were observed in the male and female brood *** is concluded from this study, some of the hematological and serum biochemical parameters of male and female A. persicus breeders were significantly varied from each other. In comparative investigation with earlier reports,the values of red blood cells, haemoglobin and haematocrit are highly varied due to age variations of ***, further studies are necessary to understand the impact of sexual, age, size, length, and season and habitat variation. Serum biochemical parameters can be used for confirming the maturity of A. persicus and monitoring any changes in the water quality parameters and soil.

关键词： aquaculture brood stocks biochemistry haematology spawning

Biodiversity and seasonal variation of benthic macrofauna in Minicoy Island, Lakshadweep,India

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Acta Oceanologica Sinica 2014年第10期33卷 58-73页

作者： Dalia Susan V satheesh kumar P. Pillai N. G. K Central Marine Fisheries Research Institute Kochi Kerala 682018 India

From the Indian coast only limited data are available on the benthic fauna of the seagrass communities. In this study, seasonal variation in the distribution of macrobenthos and influence of environmental parameters was explored at four seagrass beds and two mangrove stations along the Minicoy Island, Lakshadweep, India, from September 1999 to August 2001. A total of 160 macrobenthic species from eight major groups represented the macrofauna of the Minicoy Island. Of the identified taxa, molluscs 70（gastropods 41.46%, bivalves 7.5%）, polychaetes 27（16.88%）, crustaceans 30（18.75%）, echinoderms 11（6.88%） and remaining others. Average seasonal abundance of benthic macrofauna ranged from 219 to 711 ind./m2, species diversity varied from 1.45 to 3.64 bits per individual, species richness index ranged from 4.01 to 26.17, evenness 0.69 to 1.66. In general, the higher abundance and species diversity was noticed in southern seagrass stations and northern seagrass stations, but in the mangrove stations comparatively low species diversity was observed. Three-way analysis of variance indicated that all communities resulted as being significantly different between seagrass and mangrove station, mainly when the seasonal interaction was considered. Multivariate analyses were employed to help define benthic characteristic and the relationship between environmental parameters at the six monitoring stations. Results of cluster analyses and multidimensional scale plot suggest that for mangrove region, different physiographic provinces, lower salinity, dissolved oxygen and sediment biotic structure have a higher influence on the species composition and diversity than other oceanographic conditions.

关键词： abundance seagrass macrobenthos mangrove Minicoy Island Lakshadweep