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Articles by H. Fallah
Total Records ( 2 ) for H. Fallah
  Y. Nicknejad , R. Zarghami , M. Nasiri , H. Pirdashti , D.B. Tari and H. Fallah
  An experiment was conducted at Iran Rice Research Institute-Deputy of Mazandaran (Amol) in 2007, to study the physiological and morphological indices of different rice varieties. The experiment was carried out with, Factorial experiment in randomized completely block design comprising four replications. Studied factors were limitation of source and sink in 4 treatments viz., (1) cut all of leaves except flag leaf, (2) cut flag leaves, (3) cut 1/3 end of panicle and (4) control. Variety in four treatment was as Tarom, Neda, Shafagh and Fajr. Completion of source and sink limitation treatments were carried out at 50% flowering stage. Results showed that the most CGR was related to Shafagh variety (25.18 g/m2/day) in 1650 GDD and the least CGR was produced in the Tarom variety (21.1 g/m2/day) in 1452 GDD. The most RGR was obtained in the Shafagh and the least RGR was obtained in the Neda variety at the 850 GDD. Completion source and sink limitation treatments on leaf area index showed that cut all leaves except flag leaves had least leaf area index also with cut all of leaves and flag leaves in all of varieties the RGR was decreased. Results of morphological characteristics measurement showed that highest plant height and least plant height were produced in the Tarom and Shafag varieties, respectively. Maximum leaves number in the Tarom variety was produced in the 1180 GDD. Also, the Neda variety with produced 24 tillers per plant had most tiller number. The Tarom variety with coefficient 81.25% had most conversion all tillers to fertile tiller percentage.
  A. Gholamhoseinian , H. Fallah , F. Sharifi-Far and M. Mirtajaddini
  Alpha 1,2-mannosidase is a key enzyme in N-glycan processing in the endoplasmic reticulum (ER) and Golgi apparatus, have been one of enzyme targets in the development of anti cancer therapies. One hundred species of plants with known and unknown medicinal properties were collected and botanically identified. Methanolic and aqueous extracts prepared by maceration method. Enzyme inhibitory effects against a-mannosidase was determined spectrophotometrically at pH 4.5 and 25 °C using 0.5 mM p-nitrophenyl- α-D-mannopyranoside as the substrate and 1 units mL-1 Jack bean alpha mannosidase in 0.02 M citrate buffer. Among 200 extracts, ten extracts showed more than 20% inhibitory activity on alpha mannosidase; Punica grantum, Damask rose and Quercus infectoria among them showed more than 40%. The kinetic study of the enzyme showed that the inhibition mechanism of the three more active extracts were non competitive. Under the control condition Km value for the enzyme was 1.59 mmol and Vmax was 0.039 mmol min-1 Vmax in presence of 4 μg mL-1 Punica grantum, Damask rose and Quercus infectoria extracts were 0.020, 0.022 and 0.025 mmol min-1, respectively. The data indicated that these plants are good candidates for therapeutic use and deserve to purify the active agents effective against α- mannosidase. Further in vitro and in vivo studies are needed to reveal the actual effectiveness of each of them.
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