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1.
To assess the pollution effects of detergents in Tehran ground water aquifer, from December 1974 to September 1975, out of 3756 wells within metropolitan Tehran, 316 wells were selected according to simple random sampling without replacement. Samples from the ground water were analyzed for concentration of detergents by Methylene Blue Colorimetric Method. The conclusion asserted is that with a confidence limit of 95%, standard error of 2, and permissible error of ± 0.005, the average concentration of detergents in Tehran ground water aquifer is within 0.1593 to 0.1163 mg 1?1 as MBAS. 相似文献
2.
Mahaveer Nogiya Bhupinder Singh Geeta Singh Mahesh Chand Meena Samar C. Datta 《Archives of Agronomy and Soil Science》2019,65(10):1387-1400
Iron deficiency is a serious nutritional disorder in aerobic rice, causing chlorosis, poor yields and reduced grain nutritional quality. The problem can be managed by complementing the use of Fe-efficient plant type with a suitable Fe management strategy. In the present paper, we report the effect of eight iron management practices to resolve the problem of iron (Fe) chlorosis through the use of an iron deficiency tolerant (IDTR) and iron deficiency susceptible (IDSR) rice genotype, i.e. Pusa 33 and ADT 39, respectively. Fe deficiency tolerance of these genotypes was related to the root release of PS which enabled a higher uptake of Fe in the IDTR than the IDSR under Fe deficiency. In general, IDTR performed better than the IDSR as evident from a significant increase in total iron, active iron, chlorophyll content and grain and straw yield. IDSR produced the highest grain and straw yield under slow iron release nano clay complex source. Grain Fe content of the IDTR and IDSR increased by 18.9 and 13.4%, respectively, under recommended dose of Fe. The results identified the most effective soil management strategies for the alleviating Fe deficiency chlorosis and improving Fe nutrition of both IDTR and IDSR genotypes. 相似文献
3.
Total phenolic content, reducing power, antioxidant and free radical scavenging activities of ethanol extracts of five mosses were determined in vitro. No correlation between the total phenolic content and antioxidant or scavenging activities was found. 相似文献
4.
Gouda Ahmed Amer Shimaa A. Gabr Sherin Tolba Samar A. 《Tropical animal health and production》2020,52(6):2987-2996
This experiment was conducted to investigate the effects of dietary supplemental L-ascorbic acid (AA) and folic acid (FA) on broiler chickens under heat stress (HS) conditions when supplemented either alone or in combination. For this aim, the effect of these supplements on the broilers’ growth performance, some blood parameters, antioxidant, and immune status were evaluated. Hatchling Cobb-500 broilers (total = 240) were fed either corn and soybean meal-based diet (control group) or basal diet supplemented with 200 mg AA/kg diet, 1.5 mg FA/kg diet, or 200 mg AA plus 1.5 mg FA/kg diet, for 35 days during the summer months (n = 6 replicates/group, 10 birds/replicate). The minimum and maximum average temperatures ranged from 84.5 to 96.2 °F, and the relative humidity ranged from 68.5 to 76.5%. Supplemented vitamins either alone and (or) in combination increased (P < 0.01) broilers’ growth performance, thyroid hormones levels, insulin growth factor1, blood hemoglobin, total protein, albumin, globulin, heat shock protein70, total antioxidant capacity, catalase enzyme activity, superoxide dismutase enzyme activity, antibody titer against Newcastle disease virus, and decreased (P < 0.01) heterophil/lymphocytes. The effects (P < 0.01) of the supplemented vitamins on the analyzed parameters were better when they were added in combination. In conclusion, the combination of AA and FA at 200 and 1.5 mg/kg, respectively, increased the broilers’ antioxidant status with coordinated improvement in the growth performance and health status under HS.
相似文献5.
H. Khosravi S. M. Samar E. Fallahi H. Davoodi M. Shahabian 《Journal of plant nutrition》2013,36(6):946-953
ABSTRACT Roots of young ‘Golden Delicious’ apple on M9 rootstock were inoculated with four strains of Azotobacter chroococcum, which were isolated from various soils. Effects of these strains in combination with different levels of nitrogen (N) fertilizer and compost on plant growth and nutrient uptake were studied over two seasons. Therefore, a factorial arrangement included four strains of A. chroococcum, two levels of N-fertilizer (0 and 35 mg N kg?1soil of ammonium nitrate) and two levels of compost (0 and 12 g kg?1 soil of air-dried vermicompost). Among the four strains, AFA146 was the most beneficial strain, as it increased leaf area, leaf potassium (K), magnesium (Mg), iron (Fe), manganese (Mn), zinc (Zn), and boron (B) uptake and root N, phosphorus (P), potassium (K), Mn, and Zn. The combination of AFA146 strain, compost and N fertilizer increased leaf uptake of Ca, Mg, Fe, Mn, Zn, and B, and root uptake of P, K, Ca, Mg, Mn, and copper (Cu), and root dry weight. 相似文献
6.
Trisha Roy Samar Chandra Datta Abhijit Sarkar Siddhartha Sankar Biswas 《Archives of Agronomy and Soil Science》2018,64(11):1564-1581
Non-renewable nature of rock phosphate (RP) reserves coupled with open ended nature of P cycle makes it imperative for maximum utilization of available P resources. In this context, use of Indian RPs from Purulia and Udaipur along with citric acid loaded nanoclay polymer composite (CA-NCPC) as P source to costly diammonium phosphate (DAP) was investigated through an incubation experiment followed by a greenhouse experiment with wheat-rice cropping sequence in a Luvisol (pH 5.14, available P 13.5 mg kg?1). Soil available P, crop yield parameters and dynamics of soil P fractions were taken to judge the efficacy of CA-NCPC in solubilizing RPs. Application of CA-NCPC and DAP resulted in 82% and 69% increase in available P over control, respectively under incubation study. Direct effect of treatment receiving CA-NCPC + RP on yield and P uptake by wheat was comparable with DAP but residual impact of CA-NCPC + RP (16.7 g pot?1) was better than DAP (13.8 g pot?1) in rice. The changes in inorganic P fractions were also significant as inclusion of RP increased calcium-P from 16.1 to 61.5 mg kg?1. Results indicated potentiality of RPs treated with CA-NCPC as an alternate P source which could prove promising amidst P scarcity. 相似文献
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8.
EF Alves SK Bose RC Francis M El Moussaouiti 《Journal of agricultural and food chemistry》2012,60(36):9202-9210
In most native lignins, at least 50% of the phenylpropane (C(9)) units are involved in β-O-4 linkages. It was recently observed that ethylguaiacol (EG) was efficient at trapping coniferyl alcohol generated from the cleavage of uncondensed β-O-4 dimeric structures during soda-anthraquinone (AQ) or SAQ delignification of sugar maple wood meal. Some of the coniferyl alcohol was transformed to vinylguaiacol and isoeugenol, and the α-carbon atom in all three monomers formed C-C bonds with the C-5 position of EG. In the present research, eucalyptus and sugar cane bagasse meals were also investigated, and the yields of uncondensed β-O-4 structures in the nonsyringyl fraction were quantitated. The estimates of the uncondensed fraction of the lignin in the three samples (assuming S units are 90-95% uncondensed) were in close agreement with results from traditional but more tedious methods such as permanganate oxidation or spectroscopic methods requiring a sample representative of native lignin. 相似文献
9.
Debate regarding the biological effect of electromagnetic radiation has been recently raised. The effects of this radiation on locomotor activity are not well known. Hence, in this study, we used Drosophila melanogaster as a model organism to investigate the possible effects of short-term exposure to ringing or talking cellphone modes on locomotor activity. Interestingly, an hour exposure to the cellphone ringing mode did not significantly affect the fly movement speed in the negative geotaxis assay. However, the flies exposed to sending or sending–receiving ringing modes showed disturbed movement paths compared with control flies. To verify these results, third-instar larvae were tested using a crawling assay. The larvae exposed to emissions of 1 h sending-rings tended to crawl in short, random and scattered paths, whereas control larvae crawled parallel to the wall of the petri dish. On the other hand, exposure to the cellphone talking mode induced significant reduction in the movement speed of adult Drosophila. The speed of flies exposed to sending mode showed a negative regression with the time of exposure. The flies exposed to receiving-talk mode were significantly slower than the controls at all tested time intervals. Furthermore, the flies exposed to 1 or 2 h sending-talks exhibited irritated zigzag locomotor paths and hyperactivity. The results suggest that prolonged exposure to signalling cellphone electromagnetic radiation may exert locomotor disorders as evident by significant alterations in the neuro-behavioural events related to locomotor equilibrium of D. melanogaster. 相似文献
10.
Khaled Abo-EL-Sooud Gamal A. Swielim Samar M. EL-Gammal Meray Nabil Ramsis 《Journal of veterinary pharmacology and therapeutics》2020,43(4):313-318
The pharmacokinetics of marbofloxacin (MAR) was compared in geese (Anser Anser domesticus) after single intravenous (IV) and intramuscular (IM) (thigh and pectoral muscles) administrations of 5 mg/kg. Serum concentrations of MAR were determined with high-performance liquid chromatography (HPLC) method. Serum MAR concentrations versus time were analyzed by a noncompartmental method. After IV administration, MAR showed high volume of distribution at steady state (Vdss) of 5.24 ± 1.08 L/kg. The serum body clearance (Cl) and elimination half-life (T1/2λz) of MAR were 0.79 ± 0.07 L hr−1 kg−1 and 6.94 ± 1.12 hr, respectively. The peak of MAR serum concentrations Cmax achieved at one and 0.50 hr after thigh and pectoral IM sites of injections, respectively, were 1.20 and 0.91 μg/ml. Significant differences were found in the mean absorption time (MAT), the systemic bioavailability (F%), and elimination parameters of MAR between two sites of injections, indicating that the absorption was fairly slow and complete after thigh IM injection. The pharmacokinetics of MAR in geese diverged according to the site of IM injection following a parallel study design. We recommend the thigh muscle as IM site of injection to obtain maximum concentrations of the administered drug in geese. 相似文献