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Resistivity Measurement of Field and Laboratory for Layered Soils
( Haryati Awang ),( Nor Hayati A. Hamid ),( M. Idris Ali ),( Noram I Ramli ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
This study is about characterising the properties and types of multilayered soil profile. The purpose is to compare between the resistivity value obtain from field and laboratory tests. The field measurement was carried out on the surface of an excavated ground. The laboratory test was conducted on the material collected from each layer of the subsurface. The results of this study showed that both profiles from resistivity images and actual profiles are matched to each other when overlaid. The resistivity images showed three (3) different resstivity layers indicated by three main resistivity values. The top, midle and bottom layers of the sub surface were characterised as a compacted filled soil of brownish and redish in colour with the thickness of 0.9m, dark brown of 0.3m thick and dark bluish gray soil of 1.1m thick accordingly. The soil of layer 1 (top), layer 2(midle) and layer 3 (bottom) were classified correspondingly as CLAY of Intermediate Plasticity, as SILT of High Plasticity and as CLAY of Intermediate Plasticity. In comparison to the resistivity value between field and laboratory, layer 1, layer 2 and layer 3 of actual profile are ranged from 40 ohm.m to 150 ohm.m, 10 ohm.m to 35 ohm.m, and 0 ohm.m to 9 ohm.m. In parallel to the field resistivity value, the soil material namely as geo-resistivity index of samples of each layer are in the range of 45 ohm-m to 55 ohm-m, 9 ohm-m to 14 ohm-m and 4.5 ohm-m to 9.6 ohm-m.
M. Shahul Hamid Rahamah Bivi,Adamu Saidu Paiko,Ahmad Khairulmazmi,M. S. Akhtar,Abu Seman Idris 한국식물병리학회 2016 Plant Pathology Journal Vol.32 No.5
Continuous supplementation of mineral nutrients andsalicylic acid (SA) as foliar application could improveefficacy in controlling basal stem rot (BSR) disease inoil palm seedling. It is revealed from the results thatthe highest disease severity index (58.3%) was recordedin T8 treatments at 9 months after inoculation. The best disease control was achieved by T7 treatments(calcium/copper/SA [Ca/Cu/SA]) (5.0%) followedby T1 (5.5%), T5 (5.8%), T3 (8.3%), T6 (8.3%),T4 (13.3%), and T2 (15.8%) treatments. Continuoussupplementation of Ca/Cu/SA was found to be themost effective in controlling the disease and the highperformance liquid chromatography results showedthe detection of ergosterol at very low concentration inthe treated samples. Moreover, the transmission electronmicroscopy analysis results clearly indicated thatT7 treatment was also enhancing lignification, whichwas responsible for the thickness of the secondarycell walls and middle lamella compared to untreatedsamples. It was therefore, concluded that continuoussupplementation of minerals nutrients and SA couldeffectively suppress disease severity by reducing ergosterolactivity and also improve the process of lignificationin the treated plants. Furthermore, this treatmentalso managed to delay the onset of BSR symptoms andpromote the growth of the seedlings and eventuallysuppress the BSR disease.
Bivi, M. Shahul Hamid Rahamah,Paiko, Adamu Saidu,Khairulmazmi, Ahmad,Akhtar, M.S.,Idris, Abu Seman The Korean Society of Plant Pathology 2016 Plant Pathology Journal Vol.32 No.5
Continuous supplementation of mineral nutrients and salicylic acid (SA) as foliar application could improve efficacy in controlling basal stem rot (BSR) disease in oil palm seedling. It is revealed from the results that the highest disease severity index (58.3%) was recorded in T8 treatments at 9 months after inoculation. The best disease control was achieved by T7 treatments (calcium/copper/SA [Ca/Cu/SA]) (5.0%) followed by T1 (5.5%), T5 (5.8%), T3 (8.3%), T6 (8.3%), T4 (13.3%), and T2 (15.8%) treatments. Continuous supplementation of Ca/Cu/SA was found to be the most effective in controlling the disease and the high performance liquid chromatography results showed the detection of ergosterol at very low concentration in the treated samples. Moreover, the transmission electron microscopy analysis results clearly indicated that T7 treatment was also enhancing lignification, which was responsible for the thickness of the secondary cell walls and middle lamella compared to untreated samples. It was therefore, concluded that continuous supplementation of minerals nutrients and SA could effectively suppress disease severity by reducing ergosterol activity and also improve the process of lignification in the treated plants. Furthermore, this treatment also managed to delay the onset of BSR symptoms and promote the growth of the seedlings and eventually suppress the BSR disease.
Nutrient Digestibility of Palm Kernel Cake for Muscovy Ducks
Mustafa, M.F.,Alimon, A.R.,Zahari, M.W.,Idris, I.,Bejo, M. Hair Asian Australasian Association of Animal Productio 2004 Animal Bioscience Vol.17 No.4
Expeller pressed and solvent extracted palm kernel cake (PKC) were force-fed to male and female Muscovy ducks at 7 weeks of age. The nutrient digestibility, apparent metabolizable energy (AME), true metabolizable energy (TME) and true available amino acid (TAAA) digestibilities were determined. There was no significant (p>0.05) effect of the type of PKC used on crude protein (CP), ether extract (EE), metabolizable energy (ME) and amino acid (AA) digestibilities. However, digestibilities of dry matter (DM) and neutral detergent fibre (NDF) was found to be higher in solvent extracted compared to expeller pressed PKC. The average digestibility of DM, CP, NDF and EE were 43, 58, 39 and 89%, espectively. It was found that the ducks utilized about 47% of the gross energy of PKC. The respective average AMEn and TMEn values of PKC for Muscovy ducks was 1,743 and 1,874 kcal/kg. The overall TAAA of PKC for Muscovy ducks was 65%. The data on the TMEn and digestible AA for PKC obtained from this study provide new information with regard to diet formulation for Muscovy ducks.
Phytoplankton in tropical mangrove estuaries: role and interdependency
A.S.M. Saifullah,Abu Hena Mustafa Kamal,Mohd Hanafi Idris,Amy Halimah Rajaee,Md. Khurshid Alam Bhuiyan 한국산림과학회 2016 Forest Science And Technology Vol.12 No.2
Mangrove estuaries are claimed to be productive and important breeding grounds for fishery resources. The role of particulate organic matter (POM), especially derived from decomposed litter detritus, is well documented in mangrove estuaries. However, being a primary producer, phytoplankton may play a significant role, which has not been well discussed, in governing the productivity of mangrove estuaries. Based on relevant published literature, this paper focuses on the role of phytoplankton in mangrove estuaries in the tropical coastal region and their interdependency. Analysis reveals that there are two-way interactions between phytoplankton and mangrove estuaries. The POM enriched water in mangrove estuaries acts as an ideal medium for phytoplankton succession. Simultaneously, diversified phytoplankton assemblages play a significant role in the food web of the estuarine mangrove ecosystem. Biomass and diversity of phytoplankton are influenced by nutrient and environmental parameters in mangrove estuaries and, concurrently, phytoplankton play a significant role in fish diversity and primary production in the same system. This review reveals that the inconsistent relationships between mangroves and coastal production could probably be due to the influence of seasonal changes. This paper unveils the latent potential and role of phytoplankton in tropical mangrove estuaries, which could be a source of thought for future research in this arena.
A. B. Idris,A. K. Husaan,M. T. Siti Hajar 한국응용곤충학회 2004 Journal of Asia-Pacific Entomology Vol.7 No.1
Responses of three different strains (resistance, susceptible and cross strains) of diamondback moth (DBM), Plutella xylostella L. on Bacillus thuringiensis var. aizawai (Bta) and fipronil were studied. Results showed that mortality of DBM larvae of all strains generally decrease with concentrations of the insecticides solutions. However, larval mortality seemed to be higher when treated with fipronil than with Bta. The LC50 value for the susceptible strain treated with Bta (0.00083 ppm) was significantly lower than that of fipronil (0.00124 ppm). In contrast, the LC50 for resistance strain treated with Bta (0.03702 ppm) was significantly higher than with fipronil (0.00112 ppm), indicating that DBM populations of Karak farm have been exposed to Bta longer than to fipronil. Similarly, the cross strain treated with Bta had a significantly higher LC50 value (0.00174 ppm) than that of fipronil (0.00078 ppm). This suggests that the mechanism of resistance of DBM larvae to Bta and fipronil is different and that it could be controlled by different set of gene loci. The use of Bta alternated with fipronil in the field with minimal cross-resistance development among DBM population is discussed.Key words Bacillus thuringiensis, diamondback moth, fipronil, insecticides, resistance