https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28722 Coregonus is the multitude of nominal species of obscure identity. The northeastern Europe is inhabited by, inter alia—the vendace, Coregonus albula (Linnaeus, 1758)—considered the European cisco—and the least cisco, C. sardinella Valenciennes, 1848—often referred to as the Siberian species. There is a large area in where the ranges of both species overlap. Using morphological- as well as genetic tools we attempted to test the working hypothesis that the Coregonus fish (ciscoes) inhabiting the above-mentioned transitional zone represent a single species. Materials and methods: Within 1995–2009 we collected 344 ciscoes from five lakes in Bolshoy Solovetsky Island and determined diagnostic morphological traits for the two species. For some samples, the polymorphism of the creatine kinase isoloci (CK-A1,2*) and the fragment of mitochondrial DNA (mtDNA) encoding the subunit 1 of NADH-dehydrogenize complex (ND-1 fragment) was also studied. Results: According to one of the main taxonomical characteristics—the number of vertebrae—the cisco of Solovetsky Island occupies an intermediate position between C. albula and C. sardinella. The molecular markers,however, did not reveal any differences between the ciscoes of Bolshoy Solovetsky Island and the vendace found elsewhere. All specimens had the type allele of creatine kinase (CK-A*100) which was considered to be typical for C. albula at other locations as well as the haplotype E of mtDNA widespread in vendace populations. Conclusion: The cisco from Solovetsky Island is more similar to typical vendace. Differences in some morphological traits between Solovetsky Island populations and the vendace from elsewhere are likely to reflect adaptation to environmental conditions. Thus it appears that morphological criteria do not allow reliable differentiation between two forms of ciscoes as well as between least cisco and vendace because they are influenced by environmental conditions. We believe that the presence of populations with intermediate features is a strong argument for combining C. albula and C. sardinella into a single species (C. albula).]]> Wed 11 Apr 2018 18:29:56 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:38384 Thu 02 Sep 2021 16:12:32 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:1576 Sat 24 Mar 2018 08:30:30 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:970 Sat 24 Mar 2018 08:29:53 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26848 Sat 24 Mar 2018 07:41:49 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26289 Sat 24 Mar 2018 07:40:42 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:4723 Sat 24 Mar 2018 07:21:51 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:4727 Sat 24 Mar 2018 07:21:50 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48217 Sat 11 Mar 2023 12:36:47 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33071 Hormosira banksii is a rich source of polyphenols, which can be utilized in the food or pharmaceutical industries. This study aimed to determine the impact of six drying methods on properties of the alga H. banksii. Our data revealed that drying conditions significantly affected recovery yield, residual moisture, extraction yield, total phenolic content (TPC) as well as antioxidant capacity of H. banksii (P < 0.05). Optimal conditions for oven, vacuum and de‐humidification were 40, 50 and 50C, respectively, and microwave power is 840 W. Under optimal conditions, H. banksii prepared by freeze, de‐humidification and vacuum had significantly higher levels of TPC, total flavonoid content (TFC) and proanthocyanidins as well as possessing stronger antioxidant capacity in comparison with those prepared by sun, microwave and oven drying methods. As freeze drying is costly and time‐consuming, de‐humidification (50C, air in and out of 11.1 and 15.4%) and vacuum (50C, 10 psi) were recommended for drying H. banksii. Practical Applications: Algae possess various antioxidants with potential benefits for health. Drying is considered as a method for preserving materials, transport with low costs and especially first step for extraction, isolation and purification of active compounds. Thus, it is important to investigate the effects of drying conditions on the properties of the dried alga H. banksii. From the findings, the different drying conditions significantly affected the phytochemical profile and antioxidant activity of the dried alga and the optimal drying conditions could be applied for preparation of dried H. banksii for further processing (extraction, fractionation and isolation of bioactive compounds) as well as potential industrial applications (as a reference for drying H. banksii and other algae).]]> Fri 24 Aug 2018 13:45:06 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33068 Hormosira banksii for total phenolic content (TPC) and antioxidant activities including total antioxidant capacity (ABTS), DPPH free radical scavenging capacity (DPPH) and ferric reducing antioxidant power (FRAP) using response surface methodology (RSM). Box–Behnken design was employed to assess the effect of ultrasonic temperature, time and power on the TPC and antioxidant activities of the extracts. The results showed that RSM was an accurate and reliable method in predicting TPC and antioxidant activities (ABTS, DPPH and FRAP) of the extracts with R² values of 0.97, 0.96, 0.92 and 0.94, respectively. The ultrasonic temperature and time had the significant impact on TPC and antioxidant capacities. The optimal UAE conditions for the maximal values of TPC and antioxidant activities were of 30 °C, 60 min and power 60%, or 150 W. The values of TPC and antioxidant activities (ABTS, DPPH, FRAP) achieved under these parameters were 23.12 (mg GAE g⁻¹), 85.64 (mg TE g⁻¹), 47.24 (mg TE g⁻¹) and 12.56 (mg TE g⁻¹), respectively. UAE was found to be more efficient in comparison to conventional extraction, with shorter time for extraction and higher of TPC level and antioxidant activities. Therefore, ultrasonic-assisted extraction using RSM is effective for extraction and further isolation and purification of phenolic compounds from H. banksii. In addition, this alga could be a potential rich source of natural antioxidants applied in food and pharmaceutical fields.]]> Fri 24 Aug 2018 13:44:59 AEST ]]>