Effect of dietary zinc on the growth and metabolic enzyme activities of golden mahseer (Tor putitora) fry

The golden mahseer (Tor putitora) is an important and high valued sport and food fish of national and international importance. Therefore for promotion of golden mahseer, proper mineral supplementation in early developmental stages is very important. The present study evaluated the effects of dietary zinc on growth, survivaland physiological response of Tor putitora fry. One thousand eight hundred fry (avg.wt 54.35±3.09 mg) were randomly distributed into 6 treatment groups with triplicates each. Six iso-nitrogenous (40±0.02% to 41.44±0.01% crude protein) semi-purified diets were prepared with graded levels of dietary zinc. Zinc sulphate was added as the dietary zinc source to the basal diet. The results indicated that specific growth rate (SGR) was of value 2.52 ±0.23 gm of T. putitora fry which increased with dietary zinc levels up to a concentration of 40 mg Zn Kg-1 in diet. The zinc dependent metabolic enzymes and antioxidant enzymes was also observed to be highest in groups supplemented with 40 mg zinc/kg feed. The overall results of the present study suggest the efficacy of dietary zinc on growth, survival and physiological response of golden mahseer fry in order to garner the possibility of establishing the species to commercial aquaculture

On Photo-graphy and Teacher (Self)Education

In the current imagistic context, the photographic image has taken on a different role due to its large-scale production and dissemination. As a consequence, contemporary approaches to teacher education in Visual Arts have emphasized Image as one of the main objects of investigation. It results from the significant and complex range of meanings that it raises, as a cultural and symbolic product of humanity. Considering this reality, this paper discusses the importance of (trans)forming photo-graphy, by making images and memories present in us, according to Gilbert Durand’s idea of memory as a reservoir of human imaginary. Therefore, the discussion addresses photo-graphy as a non-verbal text and support for the (re)presentation of personal symbolic universes of learners and teachers-to-be, as well as autobiographical narratives which result from the poetic reverie theorized by Gaston Bachelard. Thus, I consider photo-graphy the booster of two fundamental instauration movements: the internalization of externalities, through revisited memories; and the externalization of interiority, through the exercise of photographic language based on dynamic changes between everyday relationships and the environment. The exercises of reading the world through signs and of analyzing and producing images as visible supports for subjectivities enable us to reveal things and reveal ourselves by transgressing presence and absence limits. It broadens the human capacity of symbolization by capturing the photographic language in its structural and pragmatic articulation which enables imaginary manifestation. Results show that relationships established between the past and the present create a relational circuit in which the imagining action of photo-graphy is enhanced, thus, providing feedback to self-education processes and enriching college students’ experiences

Bioremediation of petroleum based contaminants with biosurfactant produced by a newly isolated petroleum oil degrading bacterial strain

Petroleum based hydrocarbon degrading and biosurfactant producing bacterial strain was isolated from an automobile engine. The strain was identified as Bacillus cereus DRDU1 on the basis of 16S rDNA sequencing analysis. The strain was found to be efficiently degrading 96% of kerosene making it a potential tool for bioremediation of petroleum based contaminants. Production and optimization of the biosurfactant produced by the isolate were also carried out. Surface hydrophobicity trait of isolate was found to be 60.67 ± 1.53% and foaming percentage of the crude biosurfactant was found to be 31.33 ± 0.58%. The presence of amino acids and sugar moieties in the biosurfactant was confirmed by biochemical tests and were further validated by FTIR (the Fourier transform infrared) spectrometric analysis revealing the presence of υOH, υCOO, υCOOH, υCH (stretching), υNH, υCH2, υCH3, and υCH (bending), and υCO (ester) in the surfactant. The decrease in contact angle of hydrocarbon oil from (30.67 ± 1.15)° to (21.3 ± 1.53)° respectively after 3 and 6 days of incubation reveals its potential to emulsify petroleum oil. Further, emulsification index (E24) of biosurfactant against kerosene, crude oil, and used engine oil were determined to be 55.33 ± 1.53%, 29.67 ± 1.53%, and 20 ± 1% respectively which attracts its future application in MEOR (microbial enhanced oil recovery) process

Not Available

Not AvailableThe golden mahseer (Tor putitora) is an important and high valued sport and food fish of national and international importance. Therefore for promotion of golden mahseer, proper mineral supplementation in early developmental stages is very important. The present study evaluated the effects of dietary zinc on growth, survival and physiological response of Tor putitora fry. One thousand eight hundred fry (avg.wt 54.35±3.09 mg) were randomly distributed into 6 treatment groups with triplicates each. Six iso-nitrogenous (40±0.02% to 41.44±0.01% crude protein) semi-purified diets were prepared with graded levels of dietary zinc. Zinc sulphate was added as the dietary zinc source to the basal diet. The results indicated that specific growth rate (SGR) was of value 2.52 ±0.23 gm of T. putitora fry which increased with dietary zinc levels up to a concentration of 40 mg Zn Kg-1 in diet. The zinc dependent metabolic enzymes and antioxidant enzymes was also observed to be highest in groups supplemented with 40 mg zinc/kg feed. The overall results of the present study suggest the efficacy of dietary zinc on growth, survival and physiological response of golden mahseer fry in order to garner the possibility of establishing the species to commercial aquaculture.Not Availabl

Figure showing clear zone of inhibition around the well containing Pd NPs confirm its antimicrobial activity against MDR <i>Cronobactersakazaki</i> AMD04 strain; whereas the aqueous plant extract (PE) shows no effect and Pd(OAc)₂ shows minor effect against the isolate.

<p>Figure showing clear zone of inhibition around the well containing Pd NPs confirm its antimicrobial activity against MDR <i>Cronobactersakazaki</i> AMD04 strain; whereas the aqueous plant extract (PE) shows no effect and Pd(OAc)₂ shows minor effect against the isolate.</p

Oxidation of selective alcohols in aqueous media catalyzed by PdNPs as catalyst.

<p>Oxidation of selective alcohols in aqueous media catalyzed by PdNPs as catalyst.</p

The high resolution spectrum of the starch-assisted PdNPs (Pd 3d region); inset: curve fitted 3d5/2 peak.

<p>The high resolution spectrum of the starch-assisted PdNPs (Pd 3d region); inset: curve fitted 3d5/2 peak.</p