Optimization of Antioxidant Activity and Phenolic Compound Extraction Conditions from Red Seaweed (Laurencia obtuse)     

Osman Kadir Topuz  Nalan Gokoglu  Pinar Yerlikaya  Ilknur Ucak  Bahar Gumus 《Journal Of Aquatic Food Product Technology》2013,22(3):414-422

ABSTRACT

Response surface methodology was used to investigate the effect of ultrasound-assisted extraction conditions including solvent:seaweed ratio (10:1–30:1), extraction temperature (30–50°C), and extraction time (30–60 min) on the total phenolic compounds and antioxidant activity of red seaweed (Laurencia obtuse) extracts. The optimum extraction parameters for maximum phenolic content were as follows: solvent:seaweed ratio, 30:1; extraction temperature, 50°C; and extraction time, 42.8 min. The experiment results showed that the solvent:seaweed ratio was the most significant parameter for the extraction. The optimum extraction conditions for maximum antioxidant activity were as follows: solvent:seaweed ratio, 24.3:1; extraction temperature, 45.3°C; and extraction time, 58 min. Under the above-mentioned conditions, the experimental total phenolic content and antioxidant activity value were 26.23 ± 0.75 mg GAE/g seaweed and 120.89 ± 0.81 TEAC, respectively, of seaweed tested, which are well compatible with the predicted contents.  相似文献   

Impact of grafting and rootstock on nutrient-to-water uptake ratios during the first month after planting of hydroponically grown tomato     

Dimitrios Savvas  Golgen Bahar Öztekin  Mahmut Tepecik  Andreas Ropokis  Yuksel Tüzel  Georgia Ntatsi 《The Journal of Horticultural Science and Biotechnology》2017,92(3):294-302

Tomato plants (cv. Primadonna F₁), non-grafted, self-grafted, or grafted onto the commercial rootstocks ‘He-man’ and ‘Maxifort’, were grown in recirculating nutrient solution. The uptake concentrations (UCs), i.e. mean nutrient-to-water uptake ratios of N, P, K, Ca, Mg, Fe, Mn, Zn, Cu, and B, were estimated based either on depletion from the nutrient solution or on accumulation in the plant biomass. Grafting onto both commercial rootstocks increased the total plant biomass. Hetero-grafting also increased the leaf N, Ca, and Cu concentrations but decreased those of Mg and Fe in comparison with self- and non-grafted plants. The mean UCs of N, Ca, and Cu were higher in plants grafted onto both commercial rootstocks in comparison with self- and non-grafted plants. However, hetero-grafting also raised the UCs of P, Fe, Mn, and B, because of an increased deposition of these nutrients to the roots in comparison with self-rooted plants. The method used to estimate the UCs, i.e. nutrient removal from the recirculating nutrient solution vs. nutrient recovery from plant biomass per volume unit of transpired water, resulted in similar values for N, Ca, Zn, and Cu, but had a significant impact on those of P, K, Mg, Fe, Mn, and B.  相似文献   

Gossypol‐induced fitness gain and increased resistance to deltamethrin in beet armyworm,Spodoptera exigua (Hübner)     

Muhammad Hafeez  Sisi Liu  Saad Jan  Bahar Ali  Muhammad Shahid  G Mandela Fernndez‐Grandon  Muhammad Nawaz  Aqeel Ahmad  Mo Wang 《Pest management science》2019,75(3):683-693

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Influence of Humic Substances and Nitrogen on Yield,Fruit Quality,and Leaf Mineral Elements of ‘Early Spur Rome’ Apple     

Esmaeil Fallahi  Bahar Fallahi  Mir M. Seyedbagheri 《Journal of plant nutrition》2013,36(10):1819-1833

The effects of humic substances (AgriPlus, Humi-Zyme, and Humic Acid 6%) and nitrogen (N) on growth, yield, quality, and leaf minerals in apple (Malus domestica Borkh.) were studied during 1997–2000. Trees receiving medium or high N tended to be larger than trees with other treatments in 2000. Trees receiving AgriPlus with high N had higher yield than untreated control trees in 1998. Trees receiving medium N had larger fruits than control trees. Fruits of trees receiving high N (alone) had less red color than the control. Soluble solids concentrations (SSC) in fruits of all treatments were higher than those of the control at harvest in 1999. Fruit from the untreated control and low Humi-Zyme tended to be firmer than that from other treatments. The untreated control and low Humi-Zyme trees had lower leaf N and manganese (Mn), but higher leaf potassium (K) than trees under most other treatments. Leaf iron (Fe) in trees receiving medium Humi-Zyme was higher than that in the untreated control in two years. AgriPlus-treated trees showed higher water retention in the root zone.  相似文献   

Changes in proportions of dry matter intakes by ponies with access to pasture and haylage for 3 and 20 hours per day respectively,for six weeks     

J. Ince  A.C. Longland  J.C. Newbold  P.A. Harris 《Journal of Equine Veterinary Science》2011,31(5-6):283

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Bioremediation of Arsenic-Contaminated Water: Recent Advances and Future Prospects     

Md Mezbaul Bahar  Mallavarapu Megharaj  Ravi Naidu 《Water, air, and soil pollution》2013,224(12):1-20

Arsenic contamination of groundwater and surface water is widespread throughout the world. Considering its carcinogenicity and toxicity to human and animal health, remediation of arsenic-contaminated water has become a high priority. There are several physicochemical-based conventional technologies available for removing arsenic from water. However, these technologies possess a number of limitations such as high cost and generation of toxic by-products, etc. Therefore, research on new sustainable and cost-effective arsenic removal technologies for water has recently become an area of intense research activity. Bioremediation technology offers great potential for possible future application in decontamination of pollutants from the natural environment. It is not only environmentally friendly but cost-effective as well. This review focuses on the state-of-art knowledge of currently available arsenic remediation methods, their prospects, and recent advances with particular emphasis on bioremediation strategies.  相似文献   

Mitigation Effects of Silicon on Maize Plants Grown at High Zinc     

Cengiz Kaya  A. Levent Tuna  Osman Sonmez  Faruk Ince  David Higgs 《Journal of plant nutrition》2013,36(10):1788-1798

The effects of exogenous silicon (Si) on key growth parameters and mineral nutrients were investigated in maize grown at high zinc (Zn). Four treatments with three replicates were investigated consisting of a control (basal nutrients with 0.05 mM Zn with or without 1.0 mM Si added), 0.5 mM Zn, and 0.5 mM Zn plus 1.0 mM Si. Plants growing with high Zn alone had a lower chlorophyll (Chl.) content, leaf relative water content (RWC) and produced less biomass than the control plants. Proline content and membrane permeability was higher in zinc-treated plants than in untreated controls. Compared with the plants treated with high Zn alone, added Si significantly increased plant growth, chlorophyll content, and RWC and significantly reduced the membrane permeability and proline content. As expected, added high Zn increased leaf and root Zn, but reduced leaf phosphorus (P) and iron (Fe). Added Si reduced Zn concentration and increased Fe in leaves of maize. It can be concluded that improvement in the key growth parameters tested and mineral nutrition status in maize plants grown at high Zn induced by Si addition may protect membrane permeability under high zinc, thus mitigating Zn toxicity and improving the growth of maize plants. The results of the present experiment support the conclusion that Si may be involved in physiological and nutritional changes in plants grown at high Zn.  相似文献   

Pollution attenuation by roadside greenbelt in and around urban areas     

Md Nazrul Islam  Khandkar-Siddikur Rahman  Md Mezbaul Bahar  Md Ahsan Habib  Keisuke Ando  Nobuaki Hattori 《Urban Forestry & Urban Greening》2012,11(4):460-464

Greenbelts are effective tools for mitigation of traffic induced air and noise pollution. In this study, the potential role of greenbelts along the roadside for the reduction of air pollution and noise levels has been assessed by using seasonally monitored data in a megacity of Bangladesh. Correlation analysis was performed between the vegetation status, measured by canopy density and shelterbelt porosity, and the total suspended particles (TSP) removal percentage. Further, the reduction of noise level was also analyzed. The results showed that the greenbelts greatly contributed to reduce TSP pollution and it was as much as 65%. Noise level reduction was also achieved up to 17 dB when compared to the open area. Moreover, TSP removal percentage was correlated to the crown density. Area having higher crown density demonstrated less air pollution and lower level of noise compared to the area having lower crown density. Greenbelt showed better performance in summer time than winter.  相似文献   

The morphology of the hypoglossal dorsal root and its ganglia in Holstein cattle     

Bahar S  Eken E  Sur E 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2006,68(6):533-536

This study was carried out to describe morphologically and morphometrically the hypoglossal dorsal root and its ganglia, using heads of 20 adult Holstein cattle of both sexes. The dorsal root of the hypoglossal nerve (XII) has always an evident dorsal root ganglion (DRG) including the accessory in 30% (6 of heads) or satellite ganglia in 10% (2 of heads). There were statistically significant differences between the lengths (right: 8.64+/-0.22 mm, left: 7.91+/-0.31 mm, p<0.01) of peripheral roots of the DRG in male. Statistical significance existed in the lengths (right: 7.01+/-0.43, left: 8.27+/-0.47, p<0.05) of the central roots of the DRG in male. Since the histological findings showed that each ganglion placed on the dorsal root of the XII had the general feature of a spinal ganglion, it can be said that the XII has the intracranial peripheral (sensory) fibers and carry directly sensory input to the brain stem. In conclusion, the present study is the first to reveal the morphology of the hypoglossal dorsal root with ganglia in Holstein cattle.  相似文献   

Development and utilization of diagnostic DAMD-PCR markers for <Emphasis Type="Italic">Capsicum</Emphasis> accessions     

Ayşe Gul Ince  Mehmet Karaca  A. Naci Onus 《Genetic Resources and Crop Evolution》2009,56(2):211-221

A polymerase chain reaction (PCR) based approach involving the directed amplification of minisatellite DNA region (DAMD-PCR) was used to identify accession specific DNA markers and study genetic relationships between and within 15 accessions corresponding to 11 species in genus Capsicum. A touch down PCR profile and unique chemical concentration of ingredients resulted in reproducible and reliable DNA amplifications. The number of amplified products varied from 1 to 12 fragments depending on the template DNA and the primers. The DAMD-PCR technique provided a total of 38 accession specific DNA markers (diagnostic DAMD-PCR) which can be utilized in accession identification, preservation and genetic studies of Capsicum germplasm. Based on 1,292 polymorphic and monomorphic DNA markers directed with 22 minisatellite specific primers, accessions were divided into four major groups, three of which corresponded to the three distinct Capsicum complexes. Capsicum chacoense was found to be the most distinct species.  相似文献