Hasanuddin University

About: Hasanuddin University is a education organization based out in Makassar, Indonesia. It is known for research contribution in the topics: Population & Medicine. The organization has 5839 authors who have published 5267 publications receiving 25893 citations. The organization is also known as: Universitas Hasanuddin.

A new orthogonality and angle in a normed space

Abstract: We introduce the notion of $$g\!g$$ -orthogonality in a normed space and discuss its basic properties. We also show the connection between $$g\!g$$ -orthogonality and g-orthogonality introduced by Milicic (Mat Vesnik 39:325–334, 1987). Using $$g\!g$$ -orthogonality, we introduce the notion of $$g\!g$$ -angle between two vectors in a normed space and discuss its properties. Moreover, we apply the $$g\!g$$ -angle to examine whether or not a normed space is strictly convex.

Lipid Composition of Winged Bean (Psophocarpus tetragonolobus)

Abstract: The lipids were extracted from the winged bean (Psophocarpus tetragonolobus) seed with water-saturated n-butanol. Lipids were separated into groups by preparative TLC on silica gel G. The amount of each lipid type was determined by analysis of the fatty acid constituents in each lipid type. Glyceride was the major lipid accounting for 89.6% of the total, followed by an unknown lipid 4%, free fatty acid of 2.3%, 1, 3-diglyceride, 1, 2diglyceride and steryl ester as 1% each and finally a polar lipid as 0.2%. The results show that winged bean oil should be suitable for edible purposes. Triglycerides showed a similar profile of fatty acids to those of whole lipid: the major fatty acids were palmitic (10.9%), stearic (4.5%), oleic (37.1%), linoleic (19.0%), eicosenoic (3.6%), behenic (18.5%) and lignoceric (4.2%) acids. Compared to soybean oil, winged bean oil contained long chain fatty acids and a fairly small amount of linolenic acid which is favorable regarding oil stability against autoxidation.

Analysis of Risk Factors of Biopsychosocial with Early Childhood Caries (ECC) in Indonesian Pre-School Children

Abstract: Objective: To describe the Early Childhood Caries (ECC) in Indonesian preschool children based on biopsychosocial risk factors. Material and Methods: This research is an analytic observational with a cross sectional design toward 506 preschool children aged 2-6 years at East Luwu Regency, Indonesia. The biopsychosocialdata studied were gender, ethnicity, personal hygiene, child psychology, age, nutritional status, and dental and oral health behavior. These data were obtained through a questionnaire and clinical examination (nutritional status). Multiple linear regression analysis was performed. The statistical tests were performed at the significance level of 0.05. Results: Characteristics of respondents based on parents' origin, found that the majority of respondents were parents from Bugis tribes (68.4%) with ECC frequency of 72.2%. Regarding the visit to the dentist, 12.6% were afraid of the dentist, with ECC frequency of 71.9%. Most children had normal nutritional status (67%) with ECC frequency of 69.3%. Biopsychosocial factors, which significantly affect the Early Childhood Caries, were parents’ tribe (p=0.022) and age (p=0.011). There was an association between ECC with brushing teeth before going to bed (p=0.049), use of mouthwash (p=0.002) and consumption of snacks (p<0.001). Conclusion: Biopsychosocialfactor indicators are affect the Early Childhood Caries towards Indonesian preschool children.

Geography and spawning season drive genetic divergence among populations of the hard coral Acropora tenuis from Indonesia and Western Australia

Abstract: It has long been hypothesized that Western Australian coral reefs are genetically connected to those in Indonesia via long-distance dispersal, and that this connection may influence the timing of annual mass coral spawning on Western Australian coral reefs. This genetic connection has not been tested, and it requires re-evaluation because spawning patterns of Western Australian corals are not as synchronous or seasonal as originally thought. Here, we used population genetics to examine patterns of gene flow among populations of the scleractinian coral Acropora tenuis in Indonesia and Western Australia. Analysis of microsatellite data showed that Indonesian and Australian populations are highly genetically differentiated. Importantly, this genetic divergence is associated with differences in the seasonal spawning time of A. tenuis between the two regions, with Indonesian populations dominated by ‘spring’ spawners and Western Australian populations dominated by ‘autumn’ spawners, indicating that spawning season has an important influence on genetic structure. Furthermore, negligible gene flow between Indonesia and Western Australia indicates that the recolonization of inshore Western Australian populations since the Last Glacial Maximum was independent of input from Indonesian populations.

Late Holocene (0–6 ka) sea-level changes in the Makassar Strait, Indonesia

Abstract: . The Spermonde Archipelago, off the coast of southwest Sulawesi, consists of more than 100 small islands and hundreds of shallow-water reef areas. Most of the islands are bordered by coral reefs that grew in the past in response to paleo relative sea-level changes. Remnants of these reefs are preserved today in the form of fossil microatolls. In this study, we report the elevation, age, and paleo relative sea-level estimates derived from fossil microatolls surveyed in five islands of the Spermonde Archipelago. We describe 24 new sea-level index points, and we compare our dataset with both previously published proxies and with relative sea-level predictions from a set of 54 glacial isostatic adjustment (GIA) models, using different assumptions on both ice melting histories and mantle structure and viscosity. We use our new data and models to discuss Late Holocene (0–6 ka) relative sea-level changes in our study area and their implications in terms of modern relative sea-level estimates in the broader South and Southeast Asia region.