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Jayapura, Indonesia

Universitas Cenderawasih is a university in Jayapura, in the province Papua, Indonesia. The university is the leading educational institution in the province.The university has faculties in economics, law, teacher training and education, medical, engineering, and social and political science. Until 2002 the university had a faculty of agricultural science at Manokwari, which was then separated to form the Universitas Negeri Papua. The university is divided into two areas: mainly the "Kampus lama" which is in the Jayapura suburb of Abepura and the "Kampus baru" which is in the hillside of Waena walley. Wikipedia.

Mandik Y.I.,Cenderawasih University | Mandik Y.I.,Prince of Songkla University | Cheirsilp B.,Prince of Songkla University | Boonsawang P.,Prince of Songkla University | Prasertsan P.,Prince of Songkla University
Bioresource Technology

This study aimed to optimize flocculation efficiency of lipid-rich marine Chlorella sp. biomass and evaluate its composition in different cultivation modes. Among three flocculants including Al3+, Mg2+ and Ca2+ tested, Al3+ was most effective for harvesting microalgal biomass. Four important parameters for flocculation were optimized through response surface methodology. The maximum flocculation efficiency in photoautotrophic culture was achieved at pH 10, flocculation time of 15min, Al3+ concentration of 2.22mM and microalgal cells of 0.47g/L. The flocculation in mixotrophic culture required lower amount of Al3+ (0.74mM) than that in photoautotrophic and heterotrophic cultures (2.22mM). The biomass harvested from mixotrophic culture contained lipid at the highest content of 42.08±0.58% followed by photoautotrophic (32.08±3.88%) and heterotrophic (30.42±1.13%) cultures. The lipid-extracted microalgal biomass residues (LMBRs) contained protein as high as 38-44% and several minerals showing their potential use as animal feed and their carbohydrate content were 16-29%. © 2015 Elsevier Ltd. Source

Cheirsilp B.,Prince of Songkla University | Mandik Y.I.,Prince of Songkla University | Mandik Y.I.,Cenderawasih University | Prasertsan P.,Prince of Songkla University
Aquaculture International

Marine microalgae are used in aquaculture as a suspension to feed young fishes and shrimps. Marine Chlorella sp. is one of the most attractive marine microalgae because in addition to pigments it can accumulate lipids at a high content (>30 %) and release exopolymeric substances (EPSs) into the culture medium. This study aimed to evaluate the optimal cultivation of marine Chlorella sp. as potential sources of lipids, EPSs and pigments. Among the culturing regimes tested, mixotrophic cultivation mode produced the highest yields of biomass, lipids and EPSs. Several factors affecting mixotrophic cultivation were optimized. An increase in light intensity up to 65 μmol m−2 s−1 and carbon dioxide up to 10 % v/v in air enhanced both biomass and product formation. An increase in glucose concentration up to 1 % w/v enhanced biomass and EPS yields but decreased lipid and chlorophyll contents. A semi-continuous cultivation under optimal conditions produced microalgal biomass of 2.76 g L−1 with a high lipid content of 44.9 % and EPS of 1.46 g L−1. This study has also shown that the microalgal lipid and EPS have potential to be used as biodiesel feedstocks and bioflocculants, respectively. The concomitant production of these valuable products together with the microalgal biomass would be a potential way to offset the production cost and contribute greatly to developing industrialized microalgae cultivation. © 2015, Springer International Publishing Switzerland. Source

Brodie J.F.,University of British Columbia | Pangau-Adam M.,Cenderawasih University

Cassowaries are important seed dispersers in tropical rainforests of New Guinea, but little is known about their population ecology or their responses to human disturbance. We used camera traps to measure the occurrence, local abundance, and activity patterns of northern cassowaries Casuarius unappendiculatus in lowland forests near Nimbokrang, Papua, and dwarf cassowaries Casuarius bennetti in the Arfak Mountains, West Papua. Our goals were to assess human impacts on cassowaries at multiple spatial scales and to measure their activity patterns over an elevational divide. At fine spatial scales local abundance of cassowaries was strongly reduced in areas frequented by humans. At larger spatial scales the distance to the nearest village or drivable road did not affect local abundance but altered the stage structure of the individuals detected, with a higher proportion of juveniles relative to adults. Local abundance of cassowaries was unrelated to site usage by introduced pigs. Both populations studied were strongly diurnal and their activity patterns were not significantly different. Efforts to control hunting remain critical to sustaining cassowaries and the seed dispersal services they provide. Copyright © Fauna & Flora International 2015 Source

Pangau-Adam M.,University of Gottingen | Pangau-Adam M.,Cenderawasih University | Noske R.,Charles Darwin University | Muehlenberg M.,University of Gottingen
Human Ecology

It is well known that wild game provides a significant proportion of the dietary protein of the indigenous people of the eastern half of New Guinea (PNG), but almost nothing is known of its importance in the western half (the Indonesian province of Papua or Irian Jaya). We quantified hunting effort, harvest rates and wild meat consumption and sale in the Jayapura region of north-east Papua through interviews with 147 hunters from 21 villages and meal surveys in 93 households. Ten species of mammals, seven species of birds and at least two species of reptiles were harvested in our study area, but the introduced wild pig and rusa deer were the major target species. Hunting in our study area has shifted from a purely subsistence activity towards a more commercial form at least partly due to the emergence of markets created by Indonesian transmigrants. Although the hunting of non-indigenous and certain native species might be sustainable, the maintenance of populations of large threatened species will require sensitive management. © 2012 The Author(s). Source

Supeno S.,Cenderawasih University | Supeno S.,National University of Malaysia | Daik R.,Cenderawasih University | Daik R.,National University of Malaysia | El-Sheikh S.M.,Central Metallurgical Research and Development Institute

The synthesis of a macro-initiator from cellulose in mixtures of zinc-based ionic liquid and polar solvents including deep eutectic solvent, dimethylformamide, acetone, and tetrahydrofuran (THF) was studied. The results of FTIR and NMR spectroscopies indicated that the cellulose-based macro-initiator can only be obtained in an inert ether solvent, THF. When the amounts of cellulose and zinc-based ionic liquid were fixed at 0.5 g and 18 mL, respectively, the degree of substitution of the cellulose-based macro-initiator obtained was increased from 11.0% to 17.4% as the reaction temperature was increased from room temperature to 40 °C, as calculated from TGA thermograms. When the amount of cellulose was cut in half, a degree of substitution of 27.5% was achieved due to lower viscosity and better homogeneity of the reaction medium. A green, new, and relatively cheap approach has been shown to be suitable for synthesizing a cellulose-based macro-initiator. Source

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