ORCID Profile
0000-0002-5608-4747
Current Organisations
University of Adelaide
,
Universiti Teknologi PETRONAS
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Publisher: Department of Biodiversity, Conservation and Attractions
Date: 26-10-2017
DOI: 10.58828/NUY00847
Publisher: The Royal Society
Date: 22-01-2020
Abstract: The ersification dynamics of the Australian temperate flora remains poorly understood. Here, we investigate whether differences in plant richness in the southwest Australian (SWA) bio ersity hotspot and southeast Australian (SEA) regions of the Australian continent can be attributed to higher net ersification, more time for species accumulation, or both. We assembled dated molecular phylogenies for the 21 most species-rich flowering plant families found across mesic temperate Australia, encompassing both SWA and SEA regions, and applied a series of ersification models to investigate responses across different groups and timescales. We show that the high richness in SWA can be attributed to a higher net rate of lineage ersification and more time for species accumulation. Different pulses of ersification were retrieved in each region. A decrease in ersification rate across major flowering plant lineages at the Eocene–Oligocene boundary ( ca 34 Ma) was witnessed in SEA but not in SWA. Our study demonstrates the importance of historical ersification pulses and differential responses to global events as drivers of present-day ersity. More broadly, we show that ersity within the SWA bio ersity hotspot is not only the result of recent radiations, but also reflects older events over the history of this planet.
Publisher: Elsevier BV
Date: 05-2021
Publisher: MDPI AG
Date: 16-08-2021
Abstract: The aqueous phase reforming (APR) of glycerol was studied using sonochemically synthesized 10%Ni-x%Ca/ZrO2 catalysts (where x = 0, 0.5, 3, and 5) for the production of value-added liquid products. The APR reaction was performed in a batch reactor under the following conditions: 20 bar, 230 °C 450 rpm, and 1 h of reaction time. The synthesized catalysts were characterized using XRD, FESEM, BET, and H2-TPR to observe the effect of Ca doping on the physio-chemical properties of the catalysts. The results revealed that, at higher Ca loading, the catalysts experienced serious particles’ agglomeration, which resulted in a larger particles’ size, smaller surface area, and smaller pore volume owing to uneven distribution of the particles. The characterization results of the catalysts confirmed that the Us catalysts have a slightly higher surface area, pore volume, and pore size, as well as highly reducible and fine crystalline structure, compared with WI catalysts. The catalytic performance of the catalysts shows that 1,3-propanediol (1,3-PDO) and 1,2-propanediol (1,2-PDO) were the two main liquid products produced from this reaction. The highest selectivity of 1,3-PDO (23.84%) was obtained over the 10%Ni/ZrO2 catalyst, while the highest selectivity of 1,2-PDO (25.87%) was obtained over the 10%Ni-5%Ca/ZrO2 catalyst.
Publisher: Springer Science and Business Media LLC
Date: 09-02-2019
Publisher: Department of Biodiversity, Conservation and Attractions
Date: 17-08-2022
DOI: 10.58828/NUY01037
Publisher: Department of Biodiversity, Conservation and Attractions
Date: 24-06-2021
DOI: 10.58828/NUY01000
Publisher: MDPI AG
Date: 15-01-2021
DOI: 10.3390/SU13020788
Abstract: Dependence on fossil fuels for meeting the growing energy demand is damaging the world’s environment. There is a dire need to look for alternative fuels that are less potent to greenhouse gas emissions. Biofuels offer several advantages with less harmful effects on the environment. Biodiesel is synthesized from the organic wastes produced extensively like edible, non-edible, microbial, and waste oils. This study reviews the feasibility of the state-of-the-art feedstocks for sustainable biodiesel synthesis such as availability, and capacity to cover a significant proportion of fossil fuels. Biodiesel synthesized from oil crops, vegetable oils, and animal fats are the potential renewable carbon-neutral substitute to petroleum fuels. This study concludes that waste oils with higher oil content including waste cooking oil, waste palm oil, and algal oil are the most favorable feedstocks. The comparison of biodiesel production and parametric analysis is done critically, which is necessary to come up with the most appropriate feedstock for biodiesel synthesis. Since the critical comparison of feedstocks along with oil extraction and biodiesel production technologies has never been done before, this will help to direct future researchers to use more sustainable feedstocks for biodiesel synthesis. This study concluded that the use of third-generation feedstocks (wastes) is the most appropriate way for sustainable biodiesel production. The use of innovative costless oil extraction technologies including supercritical and microwave-assisted transesterification method is recommended for oil extraction.
Publisher: Department of Biodiversity, Conservation and Attractions
Date: 17-08-2022
DOI: 10.58828/NUY01034
Publisher: Informa UK Limited
Date: 07-06-2021
Publisher: American Chemical Society (ACS)
Date: 17-11-2020
Publisher: Elsevier BV
Date: 09-2021
Publisher: CSIRO Publishing
Date: 2018
DOI: 10.1071/SB17062
Abstract: A molecular study on Ptilotus nobilis (Lindl.) F.Muell. var. nobilis and P. exaltatus Nees var. exaltatus led to the conclusion that these taxa are conspecific, resulting in the synonymisation of the latter under the former as P. nobilis subsp. nobilis. In this study, we test previous taxonomic concepts in the P. nobilis–P. exaltatus species group by examining (1) the morphology of specimens in the herbarium and field, and (2) ecological and geographic partitioning of two widespread and broadly sympatric taxa in the group, using Maxent and CART models. We provide strong evidence supporting the reinstatement of P. exaltatus as distinct from P. nobilis, on the basis of multiple morphological characters and strong ecological and geographic partitioning, the latter showing how large-scale ecological data can be used to help resolve taxonomic issues. In addition, we raise P. nobilis subsp. angustifolius (Benl) Lally & W.R.Barker to the rank of species as P. angustifolius (Benl) T.Hammer and reinstate P. semilanatus (Lindl.) F.Muell. ex J.M.Black.
Publisher: Elsevier BV
Date: 08-2021
Publisher: Wiley
Date: 02-2022
DOI: 10.1002/AJB2.1790
Abstract: Continental-scale disjunctions and associated drivers are core research interests in biogeographic studies. Here, we selected a species-rich Australian plant genus (Calytrix Myrtaceae) as a case study to investigate these patterns. Species of this endemic Australian starflower genus have a disjunct distribution across the mesic fringes of the continent and are largely absent from the arid center. We used high-throughput sequencing to generate unprecedented resolution and near complete species-level nuclear and plastid phylogenies for Calytrix. BioGeoBEARS and biogeographic stochastic mapping were used to infer ancestral areas, the relative contributions of vicariance and dispersal events, and directionality of dispersal. Present-day disjunctions in Calytrix are explained by a combination of scenarios: (1) retreat of multiple lineages from the continental center to the more mesic fringes as Australia became progressively more arid, with subsequent extinction in the center as well as (2) origination of ancestral lineages in southwestern Australia (SWA) for species-rich clades. The SWA bio ersity hotspot is a major ersification center and the most common source area of dispersals, with multiple lineages originating in SWA and subsequently spreading to the adjacent arid Eremaean region. Our results suggest that major extinction, as a result of cooling and drying of the Australian continent in the Eocene-Miocene, shaped the present-day biogeography of Calytrix. We hypothesize that this peripheral vicariance pattern, which is similar to the African Rand flora, may explain the disjunctions of many other Australian plant groups. Further studies with densely s led phylogenies are required to test this hypothesis.
Publisher: Elsevier BV
Date: 08-2021
Publisher: American Chemical Society (ACS)
Date: 13-07-2021
Publisher: Department of Biodiversity, Conservation and Attractions
Date: 16-03-2017
DOI: 10.58828/NUY00819
Location: France
No related grants have been discovered for Mohd Hizami Mohd Yusoff.