Rumahlatu D.,Pattimura University |
Leiwakabessy F.,Pattimura University
AACL Bioflux | Year: 2017
Gastropods belonging to the mollusk phylum are widespread in various ecosystems. Ecologically, the spread of gastropoda is influenced by environmental factors, such as temperature, salinity, pH and dissolved oxygen. This research was conducted to determine the correlation between the factors of physico-chemical environment and the diversity of gastropoda in coastal water of Ambon Island, Indonesia. This research was conducted at two research stations, namely Station 1 at Ujung Tanjung Latuhalat Beach and Station 2 at coastal water of Waitatiri Passo. The results of a survey revealed that the average temperature on station 1 was 31.14°C while the average temperature of station 2 was 29.90°C. The average salinity at Station 1 was 32.02%o whereas the salinity average at Station 2 was 30.31%o. The average pH in station 1 and 2 was 7.03, while the dissolved oxygen at station 1 was 7.68 ppm which was not far different from that in station 2 with the dissolved oxygen of 7.63 ppm. The total number of species found in both research stations was 65 species, with the types of gastropoda were found scattered in 48 genera, 19 families and 7 orders. The most commonly found gastropods were from the genus of Nerita and Conus. 40 species were found in station 1 and 40 species were found in station 2. The results of the analysis showed the diversity value was very high with the diversity average of gastropoda in station 1 as much as 3.64 and in station 2 as much as 3.60 and classified into moderate category. In addition, the results of the correlation analysis showed that there was a significantly positive correlation between physical-chemical environmental factors (temperature, salinity, pH and dissolved oxygen) and the diversity of gastropoda in Coastal Waters of Ambon Island. © 2017, BIOFLUX SRL. All rights reserved.
Leasa M.,Pattimura University |
Corebima A.D.,State University of Malang
Journal of Physics: Conference Series | Year: 2017
Learning models and academic ability may affect students' achievement in science. This study, thus aimed to investigate the effect of numbered heads together (NHT) cooperative learning model on elementary students' cognitive achievement in natural science. This study employed a quasi-experimental design with pretest-posttest non-equivalent control group with 2 x 2 factorial. There were two learning models compared NHT and the conventional, and two academic ability high and low. The results of ana Cova test confirmed the difference in the students' cognitive achievement based on learning models and general academic ability. However, the interaction between learning models and academic ability did not affect the students' cognitive achievement. In conclusion, teachers are strongly recommended to be more creative in designing learning using other types of cooperative learning models. Also, schools are required to create a better learning environment which is more cooperative to avoid unfair competition among students in the classroom and as a result improve the students' academic ability. Further research needs to be conducted to explore the contribution of other aspects in cooperative learning toward cognitive achievement of students with different academic ability. © Published under licence by IOP Publishing Ltd.
Elim H.I.,Pattimura University |
Zhu Y.,Hefei University of Technology |
Sow C.-H.,National University of Singapore
Journal of Physical Chemistry C | Year: 2016
Tube-length-dependent optical nonlinearities of vertically aligned multiwalled carbon nanotube (MWNT) films have been investigated by Z-scan and transient absorption measurements with femtosecond laser pulses in the near-IR spectral range from 780 to 1550 nm. Both saturable absorption and optical Kerr nonlinearity are found to be dependent on excitation wavelength and tube length, indicating that band-filling in semiconducting tubes and longitudinal surface plasmon resonance in metallic tubes play an important role, respectively. The 1 ps relaxation time for the nonlinear response of the MWNT films, however, is independent of tube length, as evidenced from dissipation of excited energy in the radial direction. Such ultrafast vertically length-dependent in CNT can significantly contribute to fabricate vertically nanochips in various types of integrated nanodevices just like a creation of a living three-dimensional fish bone (a kind of cowfish). © 2016 American Chemical Society.
Dangeubun F.D.W.,Pattimura University |
Tetelepta J.M.S.,Pattimura University
AACL Bioflux | Year: 2013
Ninety percent of Aru Islands community are fishers and mostly inhabit coastal areas and small islands. This area mostly comprises of small islands, having unique characteristics of marine resources and quite a lot of endemic species such as turtles, dugongs, and dolphins. This area also has quite complex and diverse resources ecosystem, resulting a variety of illegal practices in natural resources utilization. This study was aimed to analyze the fisher characteristics, and try to reveal social, economic and cultural factors which lead to natural resources degradation. Result shows that: (1) social problems faced by the community are the limited access to meet the needs of education, health, light, clean water, clothing, food and shelter as well as limited information of eco-friendly natural resources technology utilization; (2) this limited access triggers the community to increase revenue by optimizing the utilization of resources in the ecosystems of the island, mangrove, sea grass, coral reefs and open waters; (3) low income and high expenditure eliminate the implementation of local wisdom in the use of natural resources in sustainable way; and (4) the level of compliance and trustfulness of the community towards the leaders are still exist, hence can be used as a key component in motivating people in the management of South-East Aru conservation area.
Hadanu R.,Pattimura University |
Asian Journal of Chemistry | Year: 2013
Quantitative electronic structure-activity relationship (QSAR) analysis of a series of mangostin derivatives as antiplasmodial compounds have been conducted using atomic net charges (q), dipole moment (?) ELUMO, EHOMO, polarizability (a), log P and massa molecular as the descriptors. The descriptors were obtained from computational chemistry method using semi-empirical PM3. Antiplasmodial activities were taken as the activity of the drugs against chloroquine-resistant plasmodiumfalciparum FCR3 strain and are presented as the value of ln (1/IC50) where IC50 is an effective concentration inhibiting 50 % of the parasite growth. The best model of QSAR model was determined by multiple linear regression method and giving equation of QSAR: ln 1/IC50 = -189.029-(752.054) qC5 + (1249.672)qO6 + (3134.359) qC9 + (1174.323) qC10 + (329.121)qC13 -(1.409)? + (75.214) ELUMO -(23.683) ELUMO -(2.156) a-(3.372) log P + (0.309) MM. The equation was significant on the 95 % level with statistical parameters: n = 15; r = 0.951; r2 = 0.905; SE = 1.326498; Fcalc/Ftable = 1.029 and gave the PRESS = 5.650972. Its means that there were only a relatively few deviations between the experimental and theoretical data of antimalarial activity.
Matrutty D.D.P.,Pattimura University
AACL Bioflux | Year: 2015
Value system of pasi is one of community based management of fisheries resources in Lease Islands, Maluku which is maintained, practiced and strengthened in community. It was believed that this system had conservation values of exploited fisheries resources. The objectives of the present study were to formulate the value systems of pasi concept and to determine how much the system contained management of fisheries resources. Data were collected by using focus group discussion, interview, and observation and then analyzed descriptively. The relationship between each value with conservation composite was determined based on high score and percentage. The identification of basic values in pasi system was categorized into 3 (three) component values namely: ecological, social and technology basic values. All three basic values component were simplified to be value component or composite which having very strong relationship to conservation of fisheries resources in the area, mainly sustainability component with the value was > 90%. The results showed that value system of pasi had very high conservation element which needs to be maintained as a community based of fisheries management in Lease Islands. © 2015, BIOFLUX SRL. All rights reserved.
Melatunan S.,Marine Biology and Ecology Research Center |
Melatunan S.,Pattimura University |
Calosi P.,Marine Biology and Ecology Research Center |
Rundle S.D.,Marine Biology and Ecology Research Center |
And 2 more authors.
Marine Ecology Progress Series | Year: 2013
Phenotypic plasticity is a mechanism by which organisms can alter their morphology, life history or behaviour in response to environmental change. Here, we investigate shell plasticity in the intertidal gastropod Littorina littorea in response to the ocean acidification and elevated temperature values predicted for 2100, focusing on shell traits known to relate to protection from predators (size, shape and thickness) and resistance to desiccation (aperture shape). We also measured and desiccation rates (measured as percentage water loss). Ocean acidification was simulated by bubbling carbon dioxide into closed-circuit tanks at concentrations of 380 and 1000 ppm, giving respective pH levels of 8.0 and 7.7; temperatures were set at 15 or 20°C. Both low pH and elevated temperature disrupted the overall investment in shell material; snails in acidified seawater and elevated temperature in isolation or in combination had lower shell growth rates than control individuals. The percentage increase in shell length was also lower for individuals kept under combined acidified seawater and elevated temperature, and the percentage of shell thickness increase at the growing edge was lower under acidified and combined conditions. Shells were also more globular (i.e. had lower aspect ratios) under elevated temperature and lower pH. Desiccation rates were lower at low pH and high temperature. Counter to predictions, water loss did not relate to shell biometric measures but was negatively correlated with adenosine triphosphate (ATP) concentrations. Finally, ATP concentration was positively correlated with shell thickening and weight, confirming the idea that negative effects of exposure to elevated pCO2/low pH and elevated temperature on shell morphology may occur (at least in part) through metabolic disruption. © Inter-Research 2013.
Herman J.M.,Pattimura University
RINA, Royal Institution of Naval Architects - International Conference on Ship and Offshore Technology, ICSOT Indonesia 2012: Developments in Ship Design ad Construction | Year: 2012
This paper talk about rudder controlled to minimized error because of waves and streams. That error is done to minimized fuel consumption. That things is done by using MRAC (Model Reference Adaptive Control). Adaptive law is done by using Liapunov Method to ensure the system stability. Mode Parameter controller, Kpm and Kdm are found by using Linear Quadratic Optimal Control to minimise the energy consumption. To damped high frequency, a low pass filter is used so rudder position still fixed although control signal is oscilating.
Ellen R.,University of Kent |
Soselisa H.L.,Pattimura University
Ethnobotany Research and Applications | Year: 2012
We compare cassava (Manihot esculenta Crantz) diversity, local knowledge and management practices in two eastern Indonesian populations that differ both ecologically and socioculturally (Nuaulu on the island of Seram, and Debut in the Kei archipelago) and make some reference to a third population (Buano, west of Seram). The report is set within the wider problem of understanding the differences and similarities between M. esculenta in its homeland (South America) and in its diaspora, and specifically in island Southeast Asia. We show how under different conditions the importance of diversity and of toxicity varies, and how in particular this is related to environmental degradation and biocultural aspects of food ecology.
Hayward P.,Southern Cross University of Australia |
Mosse J.W.,Pattimura University
Journal of Marine and Island Cultures | Year: 2012
This article analyses the contemporary nature of the smoked tuna (ikan asar1Ikan asar is a term that refers to smoked fish in general (ikan: fish+asar: smoked) but is used almost exclusively in Ambon to refer to smoked tuna. To avoid ambiguity we refer to 'smoked tuna' throughout the article rather than using the Bhasa term that its retailers and consumers commonly employ.1) trade in Ambon city (in Maluku province, eastern Indonesia) with particular regard to the operation of its central precinct along Piere Tendean Road, between the outer city suburbs of Galala and Hative Kecil, and the connection between this area and the region's fishing grounds. The precinct is chosen as a focus since its location has been determined by a complex set of historically determined socio-political forces that are still actively in play. The article's case study emphasises the dynamic nature of circumstances concerning the supply chain of products in locations experiencing substantial population growth, socio-cultural disruption and/or modernisation. The 'foodways' involved in the article's case study are, thereby, not discrete and/or stable but, rather, volatile ones that have been variously shortcut, diverted and/or disrupted under external pressures of various degrees of magnitude and/or immediacy. The maintenance of the foodways involved has required adaptation, ingenuity and the investment of socio-cultural commitment over and above the simple inducement of commercial opportunity. The food product engendered by this dynamic system is therefore not purely a market commodity (as in a simplistic economic model) but rather a cultural one with distinct attributes and significance that crystallise the intersection of various spheres of human and environmental activity in a spatio-temporal context. In attempting to provide an analysis of Ambonese smoked tuna and its Galala-Hative Kecil precinct - and the context of the Ambonese circumstances that have delivered it - the article also reflects on the sustainability of the trade and the manner in which the dynamic development of the Ambonese population may overwhelm the adaptive potential of its entrepreneurs and patrons. © 2012 Institution for Marine and Island Cultures, Mokpo National University.