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Rama Rao S. V.,Raju M.V.L.N.,Nagalakshm D.,Srilatha T.,Paul S.S.,Prakash B,Kannan A 아세아·태평양축산학회 2024 Animal Bioscience Vol.37 No.5
Objective: An experiment was conducted to study the effect of supplementing DL methionine (DL Met) at graded concentrations on performance, carcass variables, immune responses and antioxidant variables in broiler chicken fed folic acid (FA) fortified (4 mg/kg) lowmethionine diet.Methods: A basal diet (BD) without supplemental DL Met, but with higher level (4 mg/kg) of FA and a control diet (CD) with the recommended concentration of methionine (Met) were prepared. The BD was supplemented with DL Met at graded concentrations (0%, 10%, 20%, 30%, 40%, and 50% supplemental DL Met of CD). Each diet was fed ad libitum to 10 replicates of 5 broiler male chicks in each from 1 to 42 d of age.Results: Body weight gain (BWG) reduced, and feed conversion ratio (FCR) increased in broilers fed low-Met BD. At 30% and 20% inclusion of DL met, the BWG and FCR, respectively were similar to those fed the CD. Similarly, supplementation of 10% DL Met to the BD significantly increased ready to cook meat yield and breast meat weight, which were similar to those of the CD fed broilers. Lipid peroxidation reduced, the activity of antioxidant enzymes (GSHPx and GSHRx) in serum increased and lymphocyte proliferation increased with increased supplemental DL Met level in the BD. The concentrations of total protein and albumin in serum increased with DL Met supplementation to the BD.Conclusion: Based on the data, it can be concluded that supplemental Met can be reduced to less than 50% in broiler chicken diets (4.40, 3.94, and 3.39 g/kg, respectively in pre-starter, starter and finisher phases) containing 4 mg/kg FA. Objective: An experiment was conducted to study the effect of supplementing DL methionine (DL Met) at graded concentrations on performance, carcass variables, immune responses and antioxidant variables in broiler chicken fed folic acid (FA) fortified (4 mg/kg) lowmethionine diet. Methods: A basal diet (BD) without supplemental DL Met, but with higher level (4 mg/kg) of FA and a control diet (CD) with the recommended concentration of methionine (Met) were prepared. The BD was supplemented with DL Met at graded concentrations (0%, 10%, 20%, 30%, 40%, and 50% supplemental DL Met of CD). Each diet was fed ad libitum to 10 replicates of 5 broiler male chicks in each from 1 to 42 d of age. Results: Body weight gain (BWG) reduced, and feed conversion ratio (FCR) increased in broilers fed low-Met BD. At 30% and 20% inclusion of DL met, the BWG and FCR, respectively were similar to those fed the CD. Similarly, supplementation of 10% DL Met to the BD significantly increased ready to cook meat yield and breast meat weight, which were similar to those of the CD fed broilers. Lipid peroxidation reduced, the activity of antioxidant enzymes (GSHPx and GSHRx) in serum increased and lymphocyte proliferation increased with increased supplemental DL Met level in the BD. The concentrations of total protein and albumin in serum increased with DL Met supplementation to the BD. Conclusion: Based on the data, it can be concluded that supplemental Met can be reduced to less than 50% in broiler chicken diets (4.40, 3.94, and 3.39 g/kg, respectively in pre-starter, starter and finisher phases) containing 4 mg/kg FA.
Identity as Nidus: A Polyphonic Reading of Joseph Heller`s Good as Gold
( Rama Alapati ) 서울대학교 미국학연구소 2016 미국학 Vol.39 No.1
Joseph Heller is acknowledged as one of the prominent writers of twentieth century. His works have received great critical acclaim for his engaging response to the socio-economic-political events of the postwar period. As such, his works have become profound transcripts of a life and a vision that had lost its ideals. Also, he provides a satirical commentary of life through his novels which focus on the erosion of humanistic values and the ways in which language obscures and confuses reality. The present study attempts to analyze Heller’s Good as Gold (1979), through the lens of Mikhail Bakhtin’s theory of polyphony, which offers a rich exploration of the multiple voices of the text. At other end of the spectrum, the novel deals with the issue of identity and the desire to succeed in a situation where modern man is caught within the powerful tentacles of the society.
Rama Rao, S.V.,Raju, M.V.L.N.,Shyam Sunder, G.,Panda, A.K.,Pavani, P. Asian Australasian Association of Animal Productio 2007 Animal Bioscience Vol.20 No.2
An experiment was conducted to study the growth performance, bone mineralization and mineral excretion in broiler starter chicks fed high levels of cholecalciferol (CC) at sub-optimal levels of calcium (Ca) and non-phytate phosphorus (NPP). Five hundred and sixty day-old Vencobb female broiler chicks were housed in raised wire floor stainless steel battery brooder pens ($24"{\times}30"{\times}18"$) at the rate of five chicks per pen. A maize-soyabean meal basal diet was supplemented with dicalcium phosphate, oyster shell powder and synthetic CC to arrive at two levels each of Ca (0.50 and 0.60%), and NPP (0.25 and 0.30%) and four levels of CC (200, 1,200, 2,400 and 3,600 ICU/kg) in a $2{\times}3{\times}4$ factorial design. Each diet was fed ad libitum to chicks in 7 pens from 2 to 21days of age. Body weight gain, feed intake and bone weight increased (p<0.05) with increase in level of CC at both the Ca and NPP levels tested. The CC levels required to obtain significant improvement in body weight gain and feed intake reduced (2,400 ICU/kg vs. 1,200 ICU/kg) with increase in levels of P in diet (0.25% vs. 0.3%, respectively). The feed conversion ratio was significantly improved (p<0.05) with increase in level of CC from 200 to 1,200 ICU/kg diet at 0.5% Ca, while at 0.6% Ca, the level of CC in diet did not influence the feed efficiency. Tibia mineralization (density, breaking strength and ash content) and Ca and P contents in serum increased significantly (p<0.05) with increase in levels of CC in diet. The CC effect on these parameters was more pronounced at lower levels of Ca and NPP (0.5 and 0.25%, respectively). The data on body weight gain and feed intake indicated that NPP level in diet can be reduced from 0.30 to 0.25% by increasing CC from 200 to 2,400 ICU/kg. Similarly, the bone mineralization (tibia weight, density and ash content) increased non-linearly (p<0.01) with increase in CC levels in diet. Concentrations of P and Mn in excreta decreased (p<0.01), by increasing CC level from 200 to 2,400 ICU/kg diet. It can be concluded that dietary levels of Ca and NPP could be reduced to 0.50 and 0.25%, respectively by enhancing the levels of cholecalciferol from 200 to 2,400 ICU/kg with out affecting body weight gain, feed efficiency and bone mineralization. Additionally, phosphorus and manganese excretion decreased with increase in levels of CC in broiler diet.
Ag<sub>2</sub>S quantum dot-modified ZnO NP photoanodes for photovoltaic devices
( Rama Krishna Chava ),강미숙 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
Semiconductor quantum dot-sensitized solar cells (QDSSCs) technology has attracted considerable interest for solar energy harvesting and conversion efficiency. The concept of QDSSCs is similar to that of dye sensitized solar cells (DSSCs) but with the molecular dye replaced by a chalcogenide semiconductor quantum dots. The semiconductor quantum dots have two unique advantages. The band gap of the QDs can be tailored by changing the size of the QDs, allowing one to tune the visible response of the QDs. Second, the QDs can generate multiple electron-hole pairs per photon through the impact ionization effect. Ag<sub>2</sub>S is a promising photosensitizer for QDSSCs in photovoltaic cells due to its bandgap of ~1.0 eV and relatively high absorption coefficients. In this work, we report an investigation of ZnO NPs modified with Ag<sub>2</sub>S QDs and their performance in QDSSCs. A comparison of the properties between pure ZnO NPs and Ag<sub>2</sub>S QD-sensitized ZnO NPs is also investigated.
( Rama Krishna Chava ),강미숙 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) with a bandgap of ~2.7 eV, a metal-free polymeric organic semiconductor, has attracted significant attention due to its excellent performance in photocatalytic H<sub>2</sub> production. The fast charge recombination, limited optical absorption and low electrical conductivity of g-C<sub>3</sub>N<sub>4</sub> impede its practical applications. Modulating the intrinsic band gap structure to broaden light response region and enhancing the separation efficiency of photogenerated electrons and holes is a promising route to significantly improve its photocatalytic performance. In this situation, indium (In) doping into g-C<sub>3</sub>N<sub>4</sub> nano-sheets has been adopted to effectively modify the intrinsic bandgap structure to prolong the light absorption and adjust the redox potentials of g-C<sub>3</sub>N<sub>4</sub> to promote the higher photocatalytic performance.
( Rama Krishna Chava ),강미숙 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Fabrications of core-shell heteronanostructures with excellent optical properties and light induced charge separation effects have recently emerged as promising materials for solar to hydrogen conversion. In this work, 1D-2D hierarchical core-shell heteronanostructures (CSHNSs) CdS-MoS<sub>2</sub> with Au metal nanoparticles have been synthesized by a two-step hydrothermal method. The prepared heteronanostructures exhibit high efficiency toward visible photocatalytic hydrogen production. The enhanced hydrogen evolution activity of CSHNSs was attributed to the improved visible light absorption and the formation of heterojunctions between CdS, Au and MoS<sub>2</sub> components, which increases the charge separation efficiency and thereby suppressing the electron-hole recombination.