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51.
Biochemistry of lipid metabolism in olive and other oil fruits 总被引:4,自引:0,他引:4
Salas JJ Sánchez J Ramli US Manaf AM Williams M Harwood JL 《Progress in lipid research》2000,39(2):151-180
52.
Soil erosion by water is considered as one of the most significant forms of land degradation that affects sustained productivity
of agricultural land use and water quality. It is influenced by a considerable number of factors (including climate, soil,
topography, land use and types of land management), so that the information on the spatial distribution of soil erosion rate
and its related effects can be effectively employed as a baseline data for land use development and water protection. The
principal aim of this study is three-fold: (i) to map existing land use; (ii) to assess and map the spatial distribution of
average annual rate of soil losses in the study area; (iii) to evaluate spatial matching between existing and proposed land
use including a distance analysis from the water body (the Bili-Bili Dam). An analytical procedures used, respectively, include
supervised classification of satellite imagery, application of RUSLE (Revised USLE), and overlay analysis in a raster GIS
environment, utilising available information in the region covering some parts of Jeneberang catchment, South Sulawesi, Indonesia.
The results suggest that the outputs of this study can be used for the identification of land units on a cell-basis with different
land use types, rate of soil loss, inconsistency between proposed and planned land use, as well as the threat of land degradation
to the main river and the dam. The analytical procedures developed in this research may be useful in other areas, particularly
in the studies related to the assessment and mapping of land use and erosion for the importance of sustainable land use at
a relatively large area. 相似文献
53.
Idris Abd Ghani Hamady Dieng Zainal Abidin Abu Hassan Norazsida Ramli Nadia Kermani Tomomitsu Satho Hamdan Ahmad Fatimah Bt Abang Yuki Fukumitsu Abu Hassan Ahmad 《PloS one》2013,8(12)
Background
Due to problems with chemical control, there is increasing interest in the use of microsporidia for control of lepidopteran pests. However, there have been few studies to evaluate the susceptibility of exotic species to microsporidia from indigenous Lepidoptera.Methodology/Principal Findings
We investigated some biological characteristics of the microsporidian parasite isolated from wild Plutella xylostella (PX) and evaluated its pathogenicity on the laboratory responses of sympatric invasive and resident noctuid moths. There were significant differences in spore size and morphology between PX and Spodoptera litura (SL) isolates. Spores of PX isolate were ovocylindrical, while those of SL were oval. PX spores were 1.05 times longer than those of SL, which in turn were 1.49 times wider than those of the PX. The timing of infection peaks was much shorter in SL and resulted in earlier larval death. There were no noticeable differences in amplicon size (two DNA fragments were each about 1200 base pairs in length). Phylogenetic analysis revealed that the small subunit (SSU) rRNA gene sequences of the two isolates shared a clade with Nosema/Vairimorpha sequences. The absence of octospores in infected spodopteran tissues suggested that PX and SL spores are closely related to Nosema plutellae and N. bombycis, respectively. Both SL and S. exigua (SE) exhibited susceptibility to the PX isolate infection, but showed different infection patterns. Tissular infection was more diverse in the former and resulted in much greater spore production and larval mortality. Microsporidium-infected larvae pupated among both infected and control larvae, but adult emergence occurred only in the second group.Conclusion/Significance
The PX isolate infection prevented completion of development of most leafworm and beet armyworm larvae. The ability of the microsporidian isolate to severely infect and kill larvae of both native and introduced spodopterans makes it a valuable candidate for biocontrol against lepidopteran pests. 相似文献54.
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The ellobiid Ellobium scheepmakeri (Petit de la Saussaye, 1850) is reported from the banks of the Selangor River estuary, 57 years after it was first collected in Peninsular Malaysia. It was found in abundance under logs in the dryland mangrove forest of a dominantly Nypa swamp at the upper reaches of the Kuala Selangor estuary where sediment pore water salinity was recorded at 6–7 ppt. 相似文献
57.
Different approaches to gray and white matter measurements in magnetic resonance imaging (MRI) have been studied. For clinical use, the estimated values must be reliable and accurate when, unfortunately, many techniques fail on these criteria in an unrestricted clinical environment. A recent method for tissue clusterization in MRI analysis has the advantage of great simplicity, and it takes the account of partial volume effects. In this study, we will evaluate the intensity of MR sequences known as T1-weighted images in an axial sliced section. Intensity group clustering algorithms are proposed to achieve further diagnosis for brain MRI, which has been hardly studied. Subjective study has been suggested to evaluate the clustering group intensity in order to obtain the best diagnosis as well as better detection for the suspected cases. This technique makes use of image tissue biases of intensity value pixels to provide 2 regions of interest as techniques. Moreover, the original mathematic solution could still be used with a specific set of modern sequences. There are many advantages to generalize the solution, which give far more scope for application and greater accuracy. 相似文献
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Flowers morphology and nectar concentration determine the preferred food source of stingless bee,Heterotrigona itama 总被引:1,自引:0,他引:1
Norasmah Basari Sarah Najiah Ramli Nur Adawiyah Abdul-Mutalid Nur Fariza M. Shaipulah Nur Aida Hashim 《Journal of Asia》2021,24(2):232-236
Heterotrigona itama is a stingless bee species from Meliponini tribe. The bee collects nectar, pollen and resin to produce honey, bee bread, and propolis. The bee is also known to visit and collect nectar from various types of flowers but there are limited studies on why this species of bee prefers to visit certain types of flowers. This study was conducted to identify the nectar concentration in selected flowers favoured by H. itama and the relationship between the bee and the morphology of the flowers. Nectar was obtained from different species of flowers and the concentrations were measured using a digital refractometer. The tube length of each flower species and the tongue length of the bees were also measured. The results revealed that flowers preferred by H. itama have high nectar concentrations. The tube lengths of the preferred flowers were between 2.0 and 4.0 mm, which is compatible with the tongue length of the bee. This study revealed that both nectar concentration and flower morphology are important factors for the bees in choosing their food sources. The results from this study will benefit the beekeepers in the identification of flowers that should be planted in their farms to improve stingless bee beekeeping activities. Understanding the relationship between the bees and their flower preferences could also help us to understand the importance of conserving both the bee colonies and the various species of flowering plants to ensure the sustainability of flora and fauna in the ecosystem. 相似文献
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