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Articles by S. Arora
Total Records ( 5 ) for S. Arora
  J.K. Katnoria , S. Arora and A. Nagpal
  The present study was planned to estimate the content of some heavy metals and evaluate the genotoxic potential of extracts of soil samples collected from different agricultural fields of Amritsar, India, employing Ames test and Allium cepa root anaphase aberration assay (Al-RAAA). The water extraction of soil samples was carried out using distilled water (soil: water, 1:2 w/v). The extracts were evaporated to dryness and redissolved in distilled water to prepare different concentrations corresponding to 0.25, 0.5, 1.0, 2.0 and 2.5 g equivalent of soil per plate and were used with Salmonella typhimurium TA98 and TA100 strains, with and without in vitro metabolic activation (S9) to detect direct and indirect mutagenic effects. For Al-RAAA, different concentrations of extracts (10, 25, 50, 75 and 100%) were used for treatment of root tips of A. cepa. In situ conditions were also simulated by allowing the onion bulbs to root directly in soil samples contained in small pots. The genotoxic potential of soil samples was correlated with content of heavy metals like Chromium, cobalt, copper, manganese, mercury, nickel and zinc. The pH, alkalinity, water holding capacity, bulk density, moisture content, nitrates, phosphates and potassium were also studied. It was observed that soil samples, which showed the highest percentage of aberrations, also contained higher concentrations of one or more metals studied.
  N. Kataria , Abhimanu , S. Arora , A. Sharma , R. Maan , S. Soren , A.K. Kataria , N. Mohammad , P.K. Pilania , L.N. Sankhala , M.K. Thori , J.S. Gaur and A. Meena
  A study was carried out in male and female calves of Rathi breed belonging to arid tracts from India to find out status of free radical scavenging enzymes during hot ambience. Blood samples were collected during moderate and hot ambiences to harvest sera. Maximum ambient temperature ranged from 44.5-46.5°C during hot ambience. All calves were managed in similar conditions and were apparently healthy. Free radical scavenging enzymes included Superoxide Dismutase (SOD), Glutathione Reductase (GR) and Catalase (CAT). The moderate (control) mean values of serum SOD, GR and CAT were 173.00±1.43, 11.00±0.09 and 74.80±1.00 kU L-1, respectively irrespective of gender and age. Similar pattern of significant change (p≤0.05) was observed by all the three enzymes in heat stressed calves being higher during hot ambience. The mean values were 2.67, 2 and 1.41 times higher, respectively in heat stressed calves during hot ambience. The sex and age effects were significant (p≤0.05) in moderate and hot ambiences for all the three enzymes. The mean values were significantly (p≤0.05) higher in male animals than female animals. In each ambience the age effect showed a significant (p≤0.05) increase in the mean values being highest in the calves of 6 months to 1 year of age. Results clearly indicated that status of free radical enzymes changed in heat stressed calves probably to scavenge higher number of free radicals formed during hot ambience. All the three enzymes used are important biomarkers of oxidative stress. Present study provided data which can be used as reference values to assess the extent of oxidative stress. This will help in timely protection of calves from ensuing health disorders.
  R. Maan , N. Kataria , P.K. Pilania , A. Sharma , S. Arora , A. Joshi , L.N. Sankhala , S.K. Sharma , N. Mohammad , P. Nathawat and A.K. Kataria
  Serum Superoxide Dismutase (SOD) profiling was carried out in the Marwari breed of sheep from arid tracts in India. Animals were categorized according to sex and age. Blood samples were collected during moderate, extreme hot and cold ambiences to harvest sera. Mean value of serum SOD during moderate ambience was 171.76±2.72 kU L-1. Moderate mean value was considered as control. The mean value of serum SOD was significantly (p≤0.05) higher during hot and cold ambiences as compared to control. Mean value was 2.57 times higher in hot ambience and 1.54 times higher in cold ambience as compared to control. The sex and age effects were significant (p≤0.05) in all ambiences. The mean values were significantly (p≤0.05) higher in male animals than female animals. In each ambience the age effect showed a significant (p≤0.05) increase in the mean values being highest in the animals of 2.5-4.5 years of age. Increased SOD activities during extreme ambiences indicated the development of oxidative stress. Present study generated data of SOD which can be used as reference values for future studies and for diagnostic purposes. The pattern of variation of SOD activity indicated modulation of adaptive mechanisms to protect the body from changes in ambient temperatures and on this basis use of antioxidants in the animals during changing environments is recommended.
  R. Maan , N. Kataria , S. Sharma , S. Arora , A. Sharma , A. Joshi , N. Mohammad , P.K. Pilania and L.N. Sankhala
  Serum Monoamine Oxidase (MAO) activities were determined in the Marwari breed of sheep from arid tracts in India during extreme ambient temperature periods. Animals were categorised according to sex and age. Blood samples were collected during moderate, extreme hot and cold ambient temperatures to harvest sera. The overall mean value of MAO was 288.88±5.10 U L-1 which was obtained from 630 animals irrespective of sex and age. The range was 102-600 U L-1. Further mean values were determined according to ambient temperatures irrespective of sex and age. Moderate overall mean value was 162.14±4.61 U L-1 which was obtained from 210 animals during moderate ambience. The mean value of serum MAO was significantly (p≤0.05) higher during hot and cold ambient temperatures as compared to moderate mean value. The sex and age effects were significant (p≤0.05) in all ambient temperatures. The mean values were significantly (p≤0.05) higher in male animals than female animals. Age effect showed a significant (p≤0.05) increase in the mean values being highest in the animals of 2.5-4.5 years of age. The sex and age effects were significant (p≤0.05) in all ambient temperatures. Pattern of variations in serum MAO activities indicated that oxidative stress developed in sheep due to extreme ambient temperatures. Impact of hot ambient temperature was greater than cold ambient temperature.
  A. Joshi , N. Kataria , S. Sharma , A. Sharma , S. Arora , Abhimanu , R. Maan , S. Asopa , N. Arya , S. Khan and A.K. Kataria
  Present investigation was launched to detect oxidative stress in pregnant and non-pregnant Murrah buffaloes during extreme ambiences. Serum oxidase and peroxidase profiling was used as a tool to detect oxidative stress. Blood samples of apparently healthy adult female Murrah buffaloes were collected to harvest sera during extreme hot cold and moderate ambiences. Moderate mean value of serum oxidase was 50.32±1.21 UL-1 and of serum peroxidase was 49.51±1.11 mUL-1. Extreme hot and cold ambiences resulted into a significant (p≤0.05) rise in the activities of serum oxidase and peroxidase. Animals were classified as non pregnant milch, pregnant milch and pregnant dry and activities of both the enzymes were compared. It was observed that mean values of both the enzymes in non-pregnant milch, pregnant milch and pregnant dry differed significantly (p≤0.05) from each other, respectively in all the ambiences. Non pregnant milch animals showed lowest activities whereas pregnant dry animals exhibited highest activities of both the enzymes. Multipara animals showed significantly (p≤0.05) higher activities than primipara. Serum oxidase and peroxidase are considered as important markers to assess oxidative stress. Increased activities of both the enzymes reflected the presence of oxidative stress in the buffaloes. It was concluded that extreme ambiences resulted into oxidative stress affecting the animals of all the physiological states. In each ambience the magnitude of increase was greater in pregnant dry animals. Trend was similar in all the ambiences but impact was maximum during hot ambience. Multipara animals showed greater changes than primipara. It can be stated that multipara and pregnant dry animals require proper care and supplementation of immuno-nutrients in order to protect them from the ensuing risk of oxidative stress. Further serum oxidase and peroxidase activities can be used effectively in detection of oxidative stress.
 
 
 
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