Late season harvest and storage of Rubus berries—Major antioxidant and sugar levels     

Liaqat Ali  Birgitta SvenssonBeatrix W. Alsanius  Marie E. Olsson 《Scientia Horticulturae》2011

Late season production of raspberries and blackberries has become more common due to increased consumer demand and new production techniques, but information is scarce regarding the effect on nutritional quality, especially during storage. Antioxidant levels in berries can be influenced by pre-harvest climate conditions (light intensity, day length and temperature) and post-harvest storage time. This study analysed the effect of these factors on the content of different antioxidants (vitamin C, ellagic acid, anthocyanins and total phenolics) in raspberries (Rubus idaeus L. cv. Polka) and blackberries (Rubus fructicosus L. cv. Loch Ness) during storage. The analyses were performed using high performance liquid chromatography (HPLC) with photodiode array detection. Ellagic acid content during storage ranged between 104 and 114 mg/100 g fresh weight in raspberries and 172 and 182 mg/100 g fresh weight in blackberries. Anthocyanin content increased during storage from 64 to 77 mg/100 g fresh weight in raspberries, but decreased from 199 to 162 mg/100 g fresh weight in blackberries. Vitamin C content in raspberries ranged during storage between 22 and 28 mg/100 g fresh weight, but in blackberries values were lower (10–12 mg/100 g fresh weight). Significant changes in total phenolics and sugars occurred during different storage periods (0–9 or 10 days). The results suggest that late season raspberries and blackberries maintain high quality in terms of antioxidant content.  相似文献   

The glucocorticoid receptor protein binds to transfer RNA   总被引：6，自引：0，他引：6  

M Ali  W V Vedeckis 《Science (New York, N.Y.)》1987,235(4787):467-470

  相似文献   

Infectious disease. Solving the Sisyphean problem of malaria in Zanzibar     

Smith DL  Cohen JM  Moonen B  Tatem AJ  Sabot OJ  Ali A  Mugheiry SM 《Science (New York, N.Y.)》2011,332(6036):1384-1385

  相似文献   

Organic and inorganic fertilization influenced on yield and quality of sugar beet genotypes     

Irshad Ahmad  Bashir Ahmad  Shahzad Ali  Han Qing Fang  Tiening Liu  Muhammad Kamran  Yang Wu  Mati Ur Rahman  Shah Faisal 《Russian Agricultural Sciences》2016,42(3-4):218-223

The objective of this study was to evaluate the effects of organic and inorganic fertilizers on yield and quality of sugar beet genotypes (Beta vulgaris L.). Therefore a field trial was carried out at New Developmental Farm of The University Agriculture, Peshawar, Pakistan during winter 2012–13. The field experiment was layout in randomized complete block design with split plot arrangement having three replications. Fertilizers treatments (control, higo organic plus (composted manure, it contains N 2%, P 3%, K 3%, organic matter 40%, organic carbon 11%, Zn 145 mg kg^–1, Cu 56 mg kg^–1, Fe 380 mg kg^–1 and Mg 228 mg kg^–1), maxicrop sea gold (extract of sea weeds i.e., Sargasssum, Laminara Polysaccharide and Ascophyllum Nodosum), farm yard manure, NP (90: 60 kg ha^–1), NP (120: 90 kg ha^–1) and NP (150: 120 kg ha^–1) were allotted to main plots while genotypes (Sandrina, Serenada and Kawe Terma) to the sub plots. Farm yard manure (10 t ha^–1) and higo organic Plus (5 t ha^–1) was incorporated in the soil before seed bed preparation. Maxicrop sea gold (5 lit ha^–1) was sprayed after the emergence of the crop. All phosphorus was applied @ of 60, 90 and 120 kg ha^–1 at the time of sowing while nitrogen @ of 90, 120 and 150 kg ha^–1 in two splits/3 of the dose was applied at the time of sowing while the remaing 1/3 of the dose was applied before earthen up. Plots treated with application of NP ratio 120: 90 kg ha^–1 produced maximum beet yield (76.4 t ha^–1), sugar yield (11.1 t ha^–1), Pol (polarizable sugar) percentage (14.67%) and more economic return (Rs.234 Thousand ha^–1) as compared to control plots. Sugar beet genotype Serenada had significantly produced maximum beet yield (55.5 t ha^–1), sugar yield (7.9 t ha^–1), pol (polarizable sugar) percentage (14.60%), brix percentage (14.60%) and more economic return (158) as compared to other genotypes. It was concluded from the above results that sugar beet genotype Serenada treated with NP ratio 120: 90 kg ha^–1 for improved sugar beet productivity and quality therefore it is recommended for general practice in agro-climatic conditions of Peshawar valley.  相似文献   

Ketamine-induced loss of phenotype of fast-spiking interneurons is mediated by NADPH-oxidase   总被引：1，自引：0，他引：1  

Behrens MM  Ali SS  Dao DN  Lucero J  Shekhtman G  Quick KL  Dugan LL 《Science (New York, N.Y.)》2007,318(5856):1645-1647

Abuse of the dissociative anesthetic ketamine can lead to a syndrome indistinguishable from schizophrenia. In animals, repetitive exposure to this N-methyl-d-aspartate-receptor antagonist induces the dysfunction of a subset of cortical fast-spiking inhibitory interneurons, with loss of expression of parvalbumin and the gamma-aminobutyric acid-producing enzyme GAD67. We show here that exposure of mice to ketamine induced a persistent increase in brain superoxide due to activation in neurons of reduced nicotinamide adenine dinucleotide phosphate (NADPH) oxidase. Decreasing superoxide production prevented the effects of ketamine on inhibitory interneurons in the prefrontal cortex. These results suggest that NADPH oxidase may represent a novel target for the treatment of ketamine-induced psychosis.  相似文献   

Effect of a novel edible composite coating based on gum arabic and chitosan on biochemical and physiological responses of banana fruits during cold storage     

Maqbool M  Ali A  Alderson PG  Zahid N  Siddiqui Y 《Journal of agricultural and food chemistry》2011,59(10):5474-5482

The composite effects of gum arabic (GA) (5, 10, 15, and 20%) and chitosan (CH) (1.0%) on the biochemical and physiological characteristics of banana fruits stored at 13 ± 1 °C and 80 ± 3% relative humidity (RH) for 28 days and afterward for 5 days at simulated marketing conditions (25 °C, 60% RH) were investigated. Significant (P ≤ 0.05) differences were observed for the entire GA plus CH treatments as compared to the control. However, the results showed that after 33 days of storage, the weight loss and soluble solids concentration of fruits treated with 10% GA plus 1.0% CH composite coating were 24 and 54% lower, whereas fruit firmness, total carbohydrates, and reducing sugars were 31, 59, and 40% higher than the control, respectively. Furthermore, the composite edible coating of 10% GA plus 1.0% CH delayed color development and reduced the rate of respiration and ethylene evolution during storage as compared to the control. Similarly, sensory evaluation results also proved the effectiveness of 10% GA plus 1.0% CH composite coating by maintaining the overall quality of banana fruits. Consequently, the results of scanning electron microscopy also confirmed that the fruits coated with 10% GA plus 1.0% CH composite edible coating had very fewer cracks and showed a smooth surface. These findings suggest that 10% GA plus 1.0% CH as an edible composite coating can be used commercially for extending the storage life of banana fruits for up to 33 days.  相似文献   

Dicyandiamide increases the fertilizer N loss from an alkaline calcareous soil treated with <Superscript>15</Superscript>N-labelled urea under warm climate and under different crops     

Tariq Mahmood  Rehmat Ali  Zahid Latif  Wajid Ishaque 《Biology and Fertility of Soils》2011,47(6):619-631

Using an alkaline calcareous soil, experiments were conducted to elucidate the effects of nitrification inhibitor dicyandiamide (DCD) on the fate of ¹⁵N-labelled urea applied to cotton, maize, and wheat under greenhouse conditions. Combined effects of DCD and two levels of wheat straw (applied to cotton) and of fertilizer application method (conventional broadcast vs. point injection in maize and wheat) on the recovery of the fertilizer N were also studied. High soil temperatures prevailed under cotton and maize, whereas the soil temperature was relatively moderate during the wheat growing season. The fertilizer N loss under cotton was lowest (44% of the applied) when urea was applied alone; the loss increased due to DCD (54%) or wheat straw (50–54%) and was highest (63–64%) when DCD and wheat straw were applied together. Under maize also, DCD increased the loss of the fertilizer N applied by the conventional method (51% without DCD vs. 66% with DCD) or by point injection (26% without DCD vs. 42% with DCD). With the conventional method under wheat, DCD had no effect on the fertilizer N loss (34–37% of the applied). The fertilizer N loss under wheat was least (16%) when urea solution was point-injected but increased (24–26%) due to DCD or/and when pH of the urea solution was reduced to 2. Besides, DCD significantly reduced the fertilizer N uptake and increased the fertilizer N immobilization in soil under cotton and maize. However, DCD applied in combination with a higher level of wheat straw significantly increased the cotton dry matter and N yields due to increased N availability from sources other than the fertilizer. The results suggested that the use of DCD may not be beneficial in alkaline calcareous soils and that point injection of urea solution without any amendment is more effective in conserving the fertilizer N as compared to the conventional broadcast method.  相似文献   

Structure and physical properties of starch/poly vinyl alcohol/sodium montmorillonite nanocomposite films     

Ali SS  Tang X  Alavi S  Faubion J 《Journal of agricultural and food chemistry》2011,59(23):12384-12395

Nanocomposites of starch, poly vinyl alcohol (PVOH), and sodium montmorillonite (Na(+)MMT) were produced by solution mixing and cast into films. Tensile strength (TS) and elongation at the break (E%) of the films ranged from 11.60 to 22.35 MPa and 28.93-211.40%, respectively, while water vapor permeability (WVP) ranged from 0.718 to 1.430 g·mm/kPa·h·m(2). In general, an increase in Na(+)MMT content (0-20%) enhanced TS and decreased E% and WVP. Use of higher molecular weight PVOH increased both TS and E% and also decreased WVP. Mechanical properties were negatively affected, but water vapor barrier properties improved with increasing starch content (0-80%). X-ray diffraction and transmission electron microscopy were used to analyze the nanostructure, and molecular conformations and interactions in the multicomponent nanocomposites were inferred from glass transition behavior. Interactions between starch and PVOH were strongest, followed by polymer/clay interactions. On the basis of this insight, a conceptual model was presented to explain the phenomena of intercalation and exfoliation in the starch/PVOH/Na(+)MMT nanocomposites.  相似文献   

Supporting undergraduate research     

Ali F  Jadavji NM  Ong WC  Pandey KR  Patananan AN  Prabhala HK  Yang CH 《Science (New York, N.Y.)》2007,317(5834):42

  相似文献   

Reversal of bone loss in mice by nongenotropic signaling of sex steroids     

Kousteni S  Chen JR  Bellido T  Han L  Ali AA  O'Brien CA  Plotkin L  Fu Q  Mancino AT  Wen Y  Vertino AM  Powers CC  Stewart SA  Ebert R  Parfitt AM  Weinstein RS  Jilka RL  Manolagas SC 《Science (New York, N.Y.)》2002,298(5594):843-846

  相似文献