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Search Results: 1 - 10 of 53677 matches for " Y. Ramana Reddy "
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Optical, Structural and Morphological Properties of Photocatalytic ZnO Thin Films Deposited by Pray Pyrolysis Technique  [PDF]
Durgam Komaraiah, Eppa Radha, Y. Vijayakumar, J. Sivakumar, M. V. Ramana Reddy, R. Sayanna
Modern Research in Catalysis (MRC) , 2016, DOI: 10.4236/mrc.2016.54011
Abstract: Photocatalytic ZnO thin films have been deposited onto glass substrate by spray pyrolysis technique. The sprayed solution consists of 0.1 M of zinc acetate dihydrate dissolved in double distilled water and sprays onto ultrasonically cleaned glass substrates maintained at 350°C, through an air-atomizing nozzle. The X-ray diffraction (XRD), scanning electron microscopy (SEM), EDX and UV-VIS spectrophotometer were applied to describe the structural, morphological, compositional and optical properties of ZnO catalyst. XRD analysis confirms that the films were found to be single phase hexagonal wurtzite structure. The SEM micrograph of the films is shown highly uniform, crack free and found to be fiber like structures. The optical transmittance spectra of the ZnO thin films were found to be transparent to visible light and the average optical transmittance was greater than 85%. The direct optical band gap energy values of the films shift towards the lower energy as a consequence of the thermal annealing. The Urbach energy of the films was found to increase with annealing temperature. The refractive index of the films was calculated and the refractive index dispersion curve of the films obeys the single oscillator model. The values of oscillatory energy Eo, dispersion energy Ed, and static dielectric constant εs for the ZnO thin films were determined. The films were evaluated for their ability to degrade methylene blue. The Langmuir-Hinshelwood kinetic model was used to interpret quantitatively the observed kinetic experimental result. The photocatalytic activity of ZnO thin films was enhanced by annealing temperature.
Evaluation of in vitro gas production and nutrient digestibility of complete diets supplemented with different levels of thermotolerant yeast in Nellore rams
Ch. Harikrishna,M Mahender,Y Ramana Reddy,M Gnana Prakash
Veterinary World , 2012, DOI: 10.5455/vetworld.2012.477-485
Abstract: Aim: The objective of the present study was to know the effect of dietary supplementation of varied levels of thermotolerant yeast to determine best levels for sheep diets by in vitro gas production. An in vivo study on Nellore rams was used for further evaluation of diets with three best levels of yeast (obtained from in vitro data) to determine diet with optimum yeast level for growing lambs by assessing nutrient digestibility, plane of nutrition and nitrogen balance. Materials and methods: A complete diet was formulated and supplemented with five levels (0 g/kg (D ); 1 g/kg (D ); 2 g/kg 1 2 (D ); 3 g/kg (D ); 4 g/kg (D ) and 5 g/kg (D ) of thermotolerant yeast (Saccharomyces cerevisiae, OBV-9) @ 5x108 cfu/g to 3 4 5 6 determine best levels for sheep diets by IVGP technique. An in vivo study was conducted on Nellore rams (39.75 0.24 kg body weight, aged 3 years) in a 4 x 4 latin square design for further evaluation of diets with three best yeast levels based on in vitro data, to determine optimum yeast level for diets of growing lambs by assessing nutrient digestibility, plane of nutrition and nitrogen balance. The rams were housed individually in metabolic cages that allowed separation of urine and faeces to evaluate digestibility of nutrients and N balance. Animals were given 10 days adaptation period followed by 7-day collection period, feed intake and refusals were recorded. During the digestibility and N balance study, feed, refusals and faeces were analyzed for dry matter (DM), organic matter (OM) and crude protein (CP) as per AOAC, USA, while fibre fractions like neutral detergent fibre (aNDF) and acid detergent fibre (ADF) were analyzed. Data were analyzed as per the procedures suggested by Snedecor, G. W. and Cochran, W. G. (1994) and the difference between treatment means was tested for significance by Duncan's multiple-range and F Test. Results: Higher (P<0.01) IVGP volumes, in vitro organic matter degradability, metabolizable energy (ME) and total degradable organic matter were recorded for rations D to D over control, whereas the difference among D to D diets was not 2 6 2 4 significant. Significant (P<0.05) partitioning factor and efficiency of microbial biomass synthesis (EMBP) values for rations D and D and significant (P<0.01) microbial biomass production for D to D diets, recorded. Significant (P<0.01) nitrogen 2 3 2 6 (N) retention was recorded in yeast supplemented rations with high EMBP than control. Dry matter intake (DMI), DMI (% b. wt.), DMI/kg W0.75 and the digestibility of dry matter, organic matter, crude protein, crude fibr
Effect of feeding processed sweet sorghum (Sorghum bicolour (L) moench) crushed residue based complete ration on growth performance and feeding behavior of murrah buffalo calves
Ch.Venkata Seshaiah,S. Jagadeeswara Rao,Y. Ramana Reddy,D.Nagalakshmi
Veterinary World , 2013, DOI: 10.5455/vetworld.2013.151-155
Abstract: Aim: The objective of the present study is to know the effect of feeding processed sweet sorghum (Sorghum bicolour (L) moench) crushed residue (SSCR) based complete ration on growth, feeding behavior and cost of gain in Murrah buffalo calves in order to compare the feeding value of SSCR with sorghum straw (SS) and also find out the efficient way of utilization of SSCR in the diets of growing buffalo calves. Materials and Methods: Experimental complete rations were formulated with SSCR and concentrate in 50:50 ratio and processed in to SSCR chopped and concentrate (SSCRC), mash (SSCRM) and expander extruder pellets (SSCRP). The control ration was SS based complete feed processed in to mash (SSM). 24 Murrah buffalo calves (Average 137 kg body weight and aged 1 year 2 months) were randomly distributed into 4 experimental groups of 6 animals each in a completely randomized design and the experimental rations were offered to 4 groups randomly for a period of 150 days. A 7 day digestion trial was conducted at the end of 150 day growth trial to find out the nutrient digestibility of experimental rations. Eating and ruminating activities were noted every 5 minutes, and each activity was assumed to persist for the entire 5 minutes. Sorting behavior in the calves was observed physically at the time of feeding. The cost of the rations was calculated on the basis of processing cost and the prevailing market prices of the feed ingredients. Results: The DM intake (g/d), digestibilities of DM, organic matter, crude protein and nitrogen free extract and nitrogen (N) balance were higher (P<0.05) in buffalo calves fed SSCRP ration but, comparable among SSCRC, SSCRM and SSM rations. Higher (P<0.01) average daily gain (g), lower feed conversion ratio (FCR) was observed in calves fed SSCRP ration, while comparable among SSCRC, SSCRM and SSM rations. Eating, rumination and total chewing time (minutes/d,minutes/kg DMI and minutes/kg NDFI) and number of chews for eating, rumination and total chewing (per d, per kg DMI and per kg NDFI) were higher (P<0.01) in calves fed SSCRC ration and lower (P<0.01) in SSCRP ration and comparable among SSCRM and SSM rations. Sorting and selection of ration against large fibrous particles in favour of concentrate portion of the ration was observed in SSCRC ration and was not observed in SSCRP, SSCRM and SSM rations. lower (P<0.05) cost (INR) per kg gain was observed in buffalo calves fed SSCRP ration than those fed SSCRC, SSCRM and SSM rations. Conclusion: The present study indicated that SSCR may be used as roughage source in place of SS in c
DEVELOPMENT AND CHARACTERIZATION OF TASTE MASKED COMPRESSED ODT FORMULATION OF LOW BITTER DRUG
Venkata Ramana Reddy S
International Journal of Pharmaceutical Research and Development , 2010,
Abstract: Hypertension is very dangerous problem; it may occur any time to elder patients, so drugs are available for all the times and administered by patients are very easy mode. Normally all drugs are administered by oral route with water or some other liquid vehicles. At the time of emergency (for hypertension patients) water may get or not. So, to overcome these problems, tablets are to be developed and administered with out need of water. The purpose of this research was to develop oral disintegrating tablets (ODT) of low bitter hypertensive drugs like amlodipine besylate using taste enhancers as a taste masking agents. ODT of amlodipine besylate were prepared using different superdisintegrants by direct compression method. Mannitol was used as a diluent and sodium lauryl sulphate was used as a wetting (surfactant) agent. Aspartame and Acesulfame Potassium were used for unpleasant taste masked from the amlodipine besylate by cosifting and serial of blending with other excipients. The mixed final blend was then compressed into tablets. The formulations were evaluated for weight variation, hardness, friability, wetting time, disintegrating time, dissolution, taste evaluation study and in vitro dissolution. All the formulation showed low weight variation with different disintegration time and rapid in vitro dissolution. The results revealed that the tablets containing taste enhancers had a good palatability for the patients. The optimized formulation showed good taste masking, less disintegration time (<30seconds) and release profile with maximum drug being released at all time intervals. The present study demonstrated potentials for rapid disintegration in oral cavity with out water, improved taste masking and patient compliance.
The superficial ulnar artery: development and clinical significance
Reddy, Srinivasulu;Vollala, Venkata Ramana;
Jornal Vascular Brasileiro , 2007, DOI: 10.1590/S1677-54492007000300013
Abstract: the principal arteries of the upper limb show a wide range of variation that is of considerable interest to orthopedic surgeons, plastic surgeons, radiologists and anatomists. we present here a case of superficial ulnar artery found during the routine dissection of right upper limb of a 50-year-old male cadaver. the superficial ulnar artery originated from the brachial artery, crossed the median nerve anteriorly and ran lateral to this nerve and the brachial artery. the superficial ulnar artery in the arm gave rise to a narrow muscular branch to the biceps brachii. at the elbow level the artery ran superficial to the bicipital aponeurosis where it was crossed by the median cubital vein. it then ran downward and medially superficial to the forearm flexor muscles, and then downward to enter the hand. at the palm, it formed the superficial and deep palmar arches together with the branches of the radial artery. the presence of a superficial ulnar artery is clinically important when raising forearm flaps in reconstructive surgery. the embryology and clinical significance of the variation are discussed.
Carobomer Based Controlled Release Designs of Atorvastatin Calcium Tablets Evaluated Using Quality by Design (QbD) Approach  [PDF]
Arunkanth Krishnakumar Nair, Peddakotla Venkata Ramana, P. Venkat Bhaskar Rao, Bapatu Hanimi Reddy, Hari Kishan Reddy Ganthi, Useni Reddy Mallu
American Journal of Analytical Chemistry (AJAC) , 2017, DOI: 10.4236/ajac.2017.83016
Abstract: The study carried out here was focused on developing conventional monolithic controlled release matrix tablet of Atorvastatin calcium using carbomer as release controlling polymer. This system ensures the drug release at the alkaline pH region where the drug has got maximum solubility. Further the study was concentrated on comparing the impact of gelling agent polyvinyl pyrrolidone on drug release. Quality by design tools were considered during formulation development and the polymer concentrations were optimized adopting the statistical tool, design of experiments (DoE). The optimized formulation of present study exhibited desired controlled drug release characteristics in the alkaline pH conditions and at acidic environment the drug dissolution was minimal as intended.
Molecular Structure, Vibrational Analysis and First Order Hyperpolarizability of 4-Methyl-3-Nitrobenzoic Acid Using Density Functional Theory  [PDF]
Jyothi Prashanth, Gaddam Ramesh, Jarupula Laxman Naik, Jai Kishan Ojha, Byru Venkatram Reddy, Gandham Ramana Rao
Optics and Photonics Journal (OPJ) , 2015, DOI: 10.4236/opj.2015.53008
Abstract: The Fourier Transform Infrared (FTIR) and FT-Raman spectra of 4-methyl-3-nitrobenzoic acid have been recorded in the range 4000 - 400 cm-1 and 3500 - 50 cm-1, respectively. The optimized geometry of the molecule, its vibrational frequencies along with corresponding intensities have been computed using the Density Functional Theory (DFT) employing B3LYP/6-311++G basis set. The scaled values of harmonic vibrational frequencies obtained in the computations have been compared with their experimental counter parts. The scaling factors have been refined to reproduce the frequencies with an RMS error of 11.68 cm-1 between the experimental and computed frequencies. The theoretically constructed spectra agree satisfactorily with those of experimental spectra. First order hyperpolarizability constants have also been evaluated.
Cyamella in Man - Its Morphology and Review of Literature
Reddy,Sreenivasulu; Vollala,Venkata Ramana; Rao,Rajashekar;
International Journal of Morphology , 2007, DOI: 10.4067/S0717-95022007000200024
Abstract: a sesamoid bone is a little bone embedded in a joint capsule or tendon. we observed a very rare sesamoid bone (cyamella) in the popliteus muscle of a 48 - year - old male cadaver. further, the related literature is reviewed and the probable functions, morphology and clinical significance of the variation are discussed
Absence of Inferior Gluteal Artery: A Rare Observation
Reddy,Sreenivasulu; Ramana ?Vollala ?,Venkata; Rao,Mohandas;
International Journal of Morphology , 2007, DOI: 10.4067/S0717-95022007000100012
Abstract: the gluteal region is an important anatomical and clinical area which contains muscles and vital neurovascular bundles. they are important for their clinical and morphological reasons. in this manuscript we report a rare case of absence of inferior gluteal artery. in the same specimen the superior gluteal artery was taking origin from the anterior division of internal iliac artery. the structures normally supplied by the inferior gluteal artery were supplied by a branch coming from the superior gluteal artery. the developmental and clinical significance of the anatomical variation is discussed
Cyamella in Man - Its Morphology and Review of Literature Cyamella en el Hombre - Su Morfología y Revisión de la Literatura
Sreenivasulu Reddy,Venkata Ramana Vollala,Rajashekar Rao
International Journal of Morphology , 2007,
Abstract: A sesamoid bone is a little bone embedded in a joint capsule or tendon. We observed a very rare sesamoid bone (cyamella) in the popliteus muscle of a 48 - year - old male cadaver. Further, the related literature is reviewed and the probable functions, morphology and clinical significance of the variation are discussed Un hueso sesamoideo es un peque o hueso incrustado en una cápsula articular o tendón. Observamos un raro hueso sesamoideo (cyamella) en el músculo poplíteo de un cadáver de un hombre de 48 a os de edad. Además, revisamos la literatura relacionada y las funciones probables y se discute su morfología y significación clínica
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