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Akter M.S.,Chonnam National University | Oh S.,Chonnam National University | Eun J.-B.,Chonnam National University | Ahmed M.,Chonnam National University | Ahmed M.,Hajee Mohammad Danesh Science and Technology University
Food Research International | Year: 2011

Camu-camu (Myrciaria dubia) fruits are promising sources of various bioactive compounds such as vitamin C, phenolic compounds and carotenoids. Camu-camu fruits are also good sources of potassium, iron, calcium, phosphorous and various kinds of amino acids such as serine, valine and leucine. Therefore, the presence of different bioactive compounds in camu-camu fruits could be used to retard or prevent various diseases such as cardiovascular and cancer. This is an update report on nutritional compositions and health promoting phytochemicals of camu-camu fruits. This review reveals that camu-camu fruits might be used as functional foods or for nutraceutical purposes. © 2011 Elsevier Ltd.


Ahmed M.,Chonnam National University | Ahmed M.,Hajee Mohammad Danesh Science and Technology University | Akter M.S.,Chonnam National University | Lee J.-C.,Dongshin University | Eun J.-B.,Chonnam National University
LWT - Food Science and Technology | Year: 2010

Purple-fleshed sweet potato flour could be used to enhance the colour, flavour and nutrients in food products. Thus, the investigation was to produce encapsulated flours from purple-fleshed sweet potato by spray drying using combinations of various levels of ascorbic acid (5 g kg-1 and 10 g kg-1) and maltodextrin (30 g kg-1 and 100 g kg-1) and to evaluate their effects on bioactive components, physicochemical and morphological properties. Encapsulated flours had higher total phenolic content, antioxidant capacity and water solubility index than non-encapsulated flour. There were no significant differences in anthocyanin content between encapsulated and non-encapsulated flours. However, water absorption index and flavonoids content of encapsulated flours depended on concentrations of ascorbic acid and maltodextrin. In addition, the high concentrations of ascorbic acid and maltodextrin encapsulated flours had higher glass transition temperature as compared to that of lower concentrations. In respect to morphology, the particles of encapsulated flours with high concentration of ascorbic acid and maltodextrin were more aggregated than those encapsulated with lower concentrations. Therefore, flours encapsulated with 10 g kg-1 ascorbic acid and 30 g kg-1 maltodextrin could be used to enhance the antioxidant activities of functional food ingredients. © 2010 Elsevier Ltd.


Saitanis C.J.,Agricultural University of Athens | Bari S.M.,Hajee Mohammad Danesh Science and Technology University | Burkey K.O.,U.S. Department of Agriculture | Stamatelopoulos D.,Agricultural University of Athens | Agathokleous E.,Hokkaido University
Environmental Science and Pollution Research | Year: 2014

The sensitivity to ozone of ten Bangladeshi wheat cultivars was tested by exposing plants to eight ozone exposure regimes (50, 60, 80, 100, 120, 135, 150, and 200 ppb for 14, 11, 8, 6, 5, 4, 3, and 1 days, respectively, for 8 h/day) in controlled environment chambers. Visible leaf injury, dry weight, chlorophyll, carotenoid content, leaf greenness (SPAD value), quantum yield of photosynthesis, and stomatal resistance were measured to evaluate response. Shoot biomass, total chlorophyll, leaf greenness, and carotenoid content were reduced in ozone-exposed plants. Based on the results of principal component analysis (PCA)-biplot analysis, the order of sensitivity to ozone was: Akbar >> Sufi ≥ Bijoy ≥ Shatabdi > Bari-26 ≥ Gourab > Bari-25 ≥ Prodip ≥ Sourav >> Kanchan. The most important parameters to discriminate cultivars with respect to ozone sensitivity were visible injury and chlorophyll b/a ratio, whereas quantum yield of photosynthesis was less important. Differences in stomatal resistance were not a significant factor in ozone response. Regression of cultivars’ PCA scores against year of release revealed no trend, suggesting that ozone tolerance was not incorporated during cultivar breeding. © 2014, Springer-Verlag Berlin Heidelberg.


Nine M.J.,Gyeongsang National University | Munkhbayar B.,Gyeongsang National University | Rahman M.S.,Hajee Mohammad Danesh Science and Technology University | Chung H.,Gyeongsang National University | Jeong H.,Gyeongsang National University
Materials Chemistry and Physics | Year: 2013

The article reports a simple, economical and highly productive synthesis process of cuprous oxide (Cu2O) and copper/cuprous oxide (Cu/Cu 2O) nanoparticles with an average size of below 30 nm. A hydrolysis of copper (Cu) particles (200 nm or even microsize) employing low energy ball milling in aqueous circumstance results a controlled synthesis of Cu 2O and cermets of Cu/Cu2O nanoparticles. Ground particles are found both in nanobar and spherical shape with cluster nano-clouds into aqueous solution. X-ray diffraction patterns of the sample powder confirm Cu2O nanoparticles and Cu/Cu2O cermets synthesized by complete and incomplete oxidation of Cu particles, respectively. The process is accomplished at room temperature in presence of de-ionized (DI) water and controlled by changing milling period and ball sizes. Enhanced thermal conductivity of Cu2O-water and Cu/Cu2O-water nanofluids are recorded and compared with non-ground Cu-water nanofluids. © 2013 Elsevier B.V. All rights reserved.


Siddique S.,University of Bonn | Matera C.,University of Bonn | Radakovic Z.S.,University of Bonn | Hasan M.S.,University of Bonn | And 6 more authors.
Science Signaling | Year: 2014

Plants and animals produce reactive oxygen species (ROS) in response to infection. In plants, ROS not only activate defense responses and promote cell death to limit the spread of pathogens but also restrict the amount of cell death in response to pathogen recognition. Plants also use hormones, such as salicylic acid, tomediate immune responses to infection. However, there are long-lasting biotrophic plant-pathogen interactions, such as the interaction between parasitic nematodes and plant roots during which defense responses are suppressed and root cells are reorganized to specific nurse cell systems. In plants, ROS are primarily generated by plasma membrane-localized NADPH (reduced form of nicotinamide adenine dinucleotide phosphate) oxidases, and loss of NADPH oxidase activity compromises immune responses and cell death. We found that infection of Arabidopsis thaliana by the parasitic nematode Heterodera schachtii activated the NADPH oxidases RbohD and RbohF to produce ROS, which was necessary to restrict infected plant cell death and promote nurse cell formation. RbohD- and RbohF-deficient plants exhibited larger regions of cell death in response to nematode infection, and nurse cell formation was greatly reduced. Genetic disruption of SID2, which is required for salicylic acid accumulation and immune activation in nematode-infected plants, led to the increased size of nematodes in RbohD- and RbohF-deficient plants, but did not decrease plant cell death. Thus, by stimulating NADPH oxidase-generated ROS, parasitic nematodes fine-tune the pattern of plant cell death during the destructive root invasion and may antagonize salicylic acid-induced defense responses during biotrophic life stages.


Alim M.A.,Hajee Mohammad Danesh Science and Technology University | Lim U.T.,Andong National University
Biocontrol Science and Technology | Year: 2011

In a previous study, we found that soybean fields could be supplemented with refrigerated eggs of Riptortus pedestris (Fabricius) (Hemiptera: Alydidae) to enhance parasitism. As a part of a study to evaluate the effect of host egg refrigeration on parasitism, host acceptance behavior and interspecific larval competition between Gryon japonicum (Ashmead) (Hymenoptera: Scelionidae) and Ooencyrtus nezarae Ishii (Hymenoptera: Encyrtidae) were studied in multiparasitized unrefrigerated and refrigerated eggs. O. nezarae showed complete host acceptance behavior when offered refrigerated host eggs that were preparasitized by G. japonicum. Adult emergence rate of O. nezarae was 43 and 74% when the interval between the first and second oviposition was 0 and 4 days, respectively, and was not different between refrigerated and unrefrigerated eggs. Refrigeration did not change host acceptance behavior of G. japonicum, but adult emergence declined from 80% in unrefrigerated eggs to 37% in refrigerated eggs that were pre-parasitized by O. nezarae on the same day. No negative effects of refrigeration on sex ratio, adult longevity, and adult size of the both parasitoids were found. Generally host egg refrigeration did not negatively affect host acceptance behavior of the both parasitoids on preparasitized eggs or larval competition between the two parasitoids in multiparasitized host eggs with exceptions in the development time and emergence rate of G. japonicum. Therefore, host egg refrigeration may not interrupt interactions between the parasitoid populations in the field. © 2011 Taylor & Francis.


Islam M.R.,Hajee Mohammad Danesh Science and Technology University | Sikder S.,Hajee Mohammad Danesh Science and Technology University
Bangladesh Journal of Botany | Year: 2011

Variations in the phenology and degree days of five fine rice cultivars viz., Rajshahi swarna, Silkumul, Kataribhog, Lal pajam and Sanla under organic and inorganic cultural conditions were studied following a split plot design. The requirement of days to attain various phenological stages was highest in Rajshahi swarna, medium in Silkumul, Kataribhog and Lal pajam and the lowest in Sanla for both the cultural conditions. The growing degree days (GDD) and heat use efficiency (HUE) were slightly higher under inorganic than organic culture because of higher life span of rice cultivars in inorganic culture. The highest GDD and HUE were found in Rajshahi swarna, whereas the lowest in Sanla. Results also showed that the requirement of days and GDD were initially higher up to maximum tillering stage under organic culture but thereafter these requirements were greater under inorganic culture for all the cultivars. The grain yield was somewhat lower in organic compared to inorganic culture. In Rajshahi highest grain yield of swarna was 2.90 and 2.74 t/ha under inorganic and organic culture, respectively.


Mehbub M.F.,Flinders University | Mehbub M.F.,Hajee Mohammad Danesh Science and Technology University | Lei J.,Flinders University | Franco C.,Flinders University | Zhang W.,Flinders University
Marine Drugs | Year: 2014

Marine sponges belonging to the phylum Porifera (Metazoa), evolutionarily the oldest animals are the single best source of marine natural products. The present review presents a comprehensive overview of the source, taxonomy, country of origin or geographical position, chemical class, and biological activity of sponge-derived new natural products discovered between 2001 and 2010. The data has been analyzed with a view to gaining an outlook on the future trends and opportunities in the search for new compounds and their sources from marine sponges. © 2014 by the authors.


Abdul Alim M.,Hajee Mohammad Danesh Science and Technology University | Lim U.T.,Andong National University
Journal of Economic Entomology | Year: 2011

Riptortus pedestris (F.) (Hemiptera: Alydidae) is a key pest of soybean [Glycine max (L.) Merr.] in Korea and Japan. Aggregation pheromone traps have been used to attract R. pedestris. An aggregation pheromone, produced by males of R. pedestris, also attracts the egg parasitoid, Ooencyrtus nezarae Ishii (Hymenoptera: Encyrtidae). As a new method of pest management, we propose the use of nonviable host eggs in the pheromone trap together to both trap R. pedestris and propagate parasitoids on host eggs attached to the trap. ≈Ten-thousand nonviable refrigerated host eggs were placed outside pheromone traps in three soybean fields (0.1670.284 ha.). During the sampling period from 7 August to 8 October in 2008, statistical significance of treatment was not found in any life stage of R. pedestris population. However, significantly higher parasitism of both natural (7891%) and refrigerated eggs (3659%) occurred in the treatment sites, compared with control sites where parasitism was 062% and 16-34% on natural and refrigerated eggs, respectively. The proportion of bean pods with stink bug feeding damage was significantly reduced by 47% in the treatment sites. This study is the first trial of an integrated pest management (IPM) strategy using both nonviable host eggs and trap that simultaneously targets both the pest and its natural enemy. © 2011 Entomological Society of America.


Islam M.O.,Hajee Mohammad Danesh Science and Technology University
Proceeding of the 15th International Conference on Computer and Information Technology, ICCIT 2012 | Year: 2012

Steganography is one of the arts and sciences of securing or hiding secret information in some cover media. In the present study, a new steganography technique is developed to hide large data in Bitmap image using stream builder and parity checker. This method uses the concept of odd and even parity for embedding and extracting of secret message. This method is an improvement of Least Significant Bit (LSB) method for hiding information in images. The proposed method can hide large data in a single Bitmap image retaining the advantages and discarding the disadvantages of the LSB method. © 2012 IEEE.

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