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Ramya Suresh,Baskar Rajoo,Maheswari Chenniappan,Manikandan Palanichamy 대한환경공학회 2021 Environmental Engineering Research Vol.26 No.5
The present study focused on the various advanced oxidation processes; Ozone, UV radiation, O₃/H₂O₂, O₃/UV, UV/H₂O₂ and O₃/UV/H₂O₂ for treatability of dairy industry wastewater. With this aim, the trials were carried out in cylindrical reactor fortified with UV radiation and Ozone injection. Efficiency of the treatment process was evaluated considering Chemical Oxygen Demand (COD), lactose reduction and process parameters were determined to be reaction time, pH, circulation rate, and H₂O₂ dosage. 32.5%, 35.2% , 25%, 83% COD and 40.6%, 43.6%, 38.2%, 80% lactose reduction efficiency were obtained under the operating conditions for O₃/H₂O₂, O₃/UV, UV/H₂O₂ and O₃/UV/H₂O₂ processes, respectively. As per this outcome, UV/H₂O₂/O₃ process gave more than 65% of COD and 52.36% of lactose reduction efficiency than other hybrid processes. Optimum conditions for UV/H₂O₂/O₃ process (pH = 5, time = 180 mins, circulation rate = 50 mL/h and H₂O₂ dosage of 0.5 mL) resulted in 88% of COD and 93.4% lactose reduction.
( Ramya Sivanesan ),( Alvia Anwar ),( Abhishek Talwar ),( Menaka. R ),( Karthik. R ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.9
With millions of people across the globe suffering from Parkinson`s disease (PD), an objective, confirmatory test for the same is yet to be developed. This research aims to develop a system which can assist the doctor in objectively saying whether the patient is normal or under risk of PD. The proposed work combines the eye-hand co-ordination behaviour with the DaTscan images in order to determine the risk of this disorder. Initially, eye-hand coordination level of the patient is assessed through a hardware module. Then, the DaTscan image is analysed and used to extract certain geometrical parameters which shall indicate the presence of PD. These parameters are then finally fed into a Multi-Layer Perceptron Neural Network using Levenberg-Marquardt (LM) Back propagation training algorithm. Experimental results indicate that the proposed system exhibits an accuracy of around 93%.
Ramya A.,Vijayakumar V. N.,Rajakumar K.,Balasubramanian V.,Balamuralikrishnan S. 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.77 No.12
A new class of intermolecular hydrogen bonded liquid-crystal complex (HBLC) was designed and synthesized from non-mesogenic benzylmalonic acid (BMA) and mesogenic 4n-pentyloxybenzoic acid (5OBA). Intermolecular hydrogen bonds (H-bond) and vibrational functional groups were characterized by using Fourier transform-infrared spectroscopy (FTIR). Textural characterizations and the corresponding transition temperature along with enthalpy values were observed using polarizing optical microscopy (POM) and differential scanning calorimetry (DSC). The optical absorption and emission bandgap energies were calculated by using ultraviolet-visible (UV-vis) and photoluminescence (PL) spectra. The phase transition temperature, thermal stability factor, and thermal span width were calculated and their impact on the liquid crystal properties are discussed. An interesting feature of the BMA+5OBA HBLC complex was the observation of schlieren textures, and the induced thermoluminescence with parachromic variation in the nematic phase is an alternative tool for the manufacture of opto-electronic devices.
Ramya R.S.,Srivastava Chitra,Subramanian Sabtharishi,Ranjith M. 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.1
Resistance developed by Tribolium castaneum (Herbst), a major pest of stored grain and grain products, to phosphine is a serious concern. Treatment of phosphine is given to all the stages (egg, larva, pupa and adult) of insects simultaneously in the infected commodity. Effective resistance management tactics need a proper un derstanding of expression of resistance in relation to dosage in immature stages including larvae. So, this study was undertaken to understand the genetic basis of phosphine resistance in larval stage of T. castaneum by crossing the resistant and susceptible parents to obtain the F 1 , F 2 and the back-cross progenies. The resistant parent had a resistance ratio of 37.75 when compared to the susceptible parent. The susceptibility levels of the reciprocal F 1 hybrids did not show any significant difference indicating autosomal mode of inheritance of resistance. Level of dominance for the reciprocal F 1 hybrids was estimated (-0.70 and − 0.68) which showed that the resistance is expressed as incompletely recessive in larval stage of T. castaneum. χ 2 analysis showed that the observed and expected mortalities differed significantly (P < 0.05) in most of the concentrations indicating that more than one gene is responsible for phosphine resistance. Two plateaus at ~ 40 % and ~ 90 % mortality levels for the backcross progeny to the resistant parent further confirmed the involvement of two or more genes in imparting resistance to phosphine. Our results will aid in enhancing the knowledge on the development of resistance to phosphine in the field and thus facilitate in designing suitable resistance management tactics.
Orchid floral volatiles: Biosynthesis genes and transcriptional regulations
Ramya, Mummadireddy,An, Hye Ryun,Baek, Yun Su,Reddy, Kondreddy Eswar,Park, Pue Hee Elsevier 2018 Scientia horticulturae Vol.235 No.-
<P>Floral scent and colour are key trait for many floricultural crops. Floral volatiles are biologically and economically important plant derived compounds and they play vital role in pollinator attraction, plant defense and interaction with surrounding the environment. Orchidaceae is one of the largest and most widespread families of flowering plants, with more than 25,000 species. Orchids are one of the most significant plants in ecologically adopted every habitation on earth. Floral volatiles is not limited in its role to pollinator attraction, it's widely used for perfumes, cosmetics, flavourings and therapeutic applications. Even though biochemistry of floral volatiles is still new field for investigation. Due to importance of the plant biology orchid floral scent research were deeply needed. Analysis of the biosynthesis mechanisms involved in floral scent is necessary to understand the fine-scale molecular functions and to breed to new cultivars through floral volatile genetic engineering approaches. Now a days many researchers developed floral scent models in plants. However, little is known about the pathways responsible for floral scent in orchids, due to the long life cycle and large genome size. Only some terpenoid pathways were reported in orchids. In this review, we mainly concentrated orchid floral volatile regulation and compounds synthesis responsible pathways. Moreover,we mentioned emission of orchid floral volatiles and their function in pollination ecology. This information will provide a basic information on orchid floral scent research.</P>
Insilico profiling of microRNAs in Korean ginseng (Panax ginseng Meyer)
Ramya Mathiyalagan,Sathiyamoorthy Subramaniyam,Sathishkumar Natarajan,Yeon Ju Kim,Myung Suk Sun,Se Young Kim,Yu-Jin Kim,Deok Chun Yang 고려인삼학회 2013 Journal of Ginseng Research Vol.37 No.2
MicroRNAs (miRNAs) are a class of recently discovered non-coding small RNA molecules, on average approximately 21 nucleotides in length, which underlie numerous important biological roles in gene regulation in various organisms. The miRNA database (release 18) has 18,226 miRNAs, which have been deposited from different species. Although miRNAs have been identified and validated in many plant species, no studies have been reported on discovering miRNAs in Panax ginseng Meyer, which is a traditionally known medicinal plant in oriental medicine, also known as Korean ginseng. It has triterpene ginseng saponins called ginsenosides, which are responsible for its various pharmacological activities. Predicting conserved miRNAs by homologybased analysis with available expressed sequence tag (EST) sequences can be powerful, if the species lacks whole genome sequence information. In this study by using the EST based computational approach, 69 conserved miRNAs belonging to 44 miRNA families were identified in Korean ginseng. The digital gene expression patterns of predicted conserved miRNAs were analyzed by deep sequencing using small RNA sequences of flower buds, leaves, and lateral roots. We have found that many of the identified miRNAs showed tissue specific expressions. Using the insilico method, 346 potential targets were identified for the predicted 69 conserved miRNAs by searching the ginseng EST database, and the predicted targets were mainly involved in secondary metabolic processes, responses to biotic and abiotic stress, and transcription regulator activities, as well as a variety of other metabolic processes.