黑料网大事记

At the end of each year, TSP students, academics and other 黑料网大事记 Science community members gather to celebrate the collaborative work students and researchers have achieved over the past few months.

Students choose a research project or research group in one of the schools of 黑料网大事记 Science or 黑料网大事记 Medicine to work on current challenges that our academics are trying to solve. This is an opportunity for our students to be immersed in the research realm where they may attend research group meetings, perform laboratory experiments and be at the forefront of science discovery.

  • Posters

    • Name: Thomas Nguyen
      Supervisor: Sarah Brough

    • Name: Hannah Wah Day
      Supervisors:听Martina Lessio and Fabio Colasuonno

    • Name:听Kerri Belinda Wainstein
      Supervisor:听Marc Wilkins

    Presentations

    • Name:听Yashwanth Madan
      Supervisor:听Sarah Martell

      Lithium is a rare element, constituting 1% of the universe, and is known for its susceptibility to destruction through nuclear fusion in stars. Subsequently, astronomers expect that the lithium content within a star will gradually diminish over time due to the fusion and convection that occur throughout its lifespan. An intriguing puzzle emerges as several thousand red giant stars have been observed to be rich in lithium content. This defies our expectations as the red giant phase is late in a star's life cycle, by which time most of the initial lithium abundance should have been destroyed. Studies of the other properties of lithium-rich red giants aim to pinpoint what is special about them, and what unusual processes they may have undergone. This project investigates the recent observation that ~55% of lithium rich stars also exhibit strong absorption in the helium absorption line at 10830 脜, using optical and near-infrared spectroscopy for a set of 49 red giants obtained with the Very Large Telescope in Chile. Within this data set we do not find any correlation between high lithium abundance and high helium absorption, with 2 stars having high helium absorption and none of those stars having high lithium abundance. Future work in this project will include simulating evolution of lithium abundance in a population of red giants to understand which processes are effective at creating lithium richness.

    • Name: Joseph Evans
      Supervisor:听Michael Janitz

      Circular RNAs (circRNAs) are small noncoding molecules that are increasingly believed to play an important role in gene expression. They consist of a single strand of RNA, covalently looped to itself to form a circular molecule. As a relatively new focus in the literature, there are limited tools and softwares available for analysing circRNAs. In particular, the presence of microRNA recognition elements (MREs) and RNA-binding protein (RBP) sites, as well as the visualisation of the molecule, are the key features that could be considered using bioinformatics. Here, we investigated two bioinformatics softwares for circRNA analysis: CircView and CRAFT. We found that CircView was capable of basic visualisation of circRNAs, but was unable to provide any deeper MRE or RBP site analysis. CRAFT provided a much more promising bioinformatics platform for functional predictions involving MREs and RBP sites.鈥

    • Name:听Auguste McNally
      Supervisor:听Martina Stenzel

      Lithium metal anodes are ideal for lithium-ion battery use due to their high energy density. The use of zero excess lithium in batteries (i.e. anode-free batteries) offers the remarkable energy density of the lithium metal anode while minimising the risk and reducing cost by forming the anode in situ on the current collector. However, these anode free batteries suffer from poor cyclability due to formation of unreactive lithium from the plating and stripping process. This project investigated the use of lab made aluminium-lithium alloy as a cathode collector for anode free batteries to increase their cyclability and capacity. Current results show that the lithium, at low current rates, can be sufficiently stripped from the alloy and thus potentially act as an extra lithium source for anode free batteries.听

    • Names:听Willow Heller and Alyssa Lim
      Supervisor:听Gavan McNally

      Fibroplast growth factor (FGF21) is a liver-derived hormone with pharmaceutical applications in diabetes treatment. Further, recent research has nominated a potential circuit-specific function in suppressing alcohol consumption in both humans and rodents. Prior research has not examined the effect of this compound when animals are given a choice between alcohol and an alternative. Furthermore, the effect of this drug following escalated alcohol consumption has yet to be observed. The present study examined the effect of different dosages of an FGF21 analogue PF-05231023 on home-cage intermittent ethanol consumption in mice exhibiting pre-existing escalated alcohol consumption, freely choosing between water and ethanol. We observed that a 3% dosage of PF-05231023 but not a 1% or 10% dosage significantly reduced ethanol preference and consumption in the first day following injections. We conclude that PF-05231023 has some effect in reducing alcohol consumption in this model of alcohol use disorder, however its effects are less clear over extended periods.

    • Name:听Xiangjun Tan
      Supervisor:听Susan Coppersmith

      It is well known that quantum algorithms can simulate the many-body problem. Our work specifically focuses on simulating collective oscillations, which can contribute non-linearly to the evolution of flavours. We simulate the time evolution of a model with three neutrino flavours for one neutrino and collective neutrino oscillations using U 鈭 SU(4) representation on a noisy quantum processor. We explore a generalization of the Trotter-Suzuki approximation for time-dependent Hamiltonian dynamics. Additionally, we suppress errors using strategies like the Trotter and Cartan decomposition to reduce the gate cost. A noise model for the corresponding quantum processor is also created to perform Zero-Noise Extrapolation (ZNE) and Probabilistic Error Cancellation (PEC) error mitigation on NISQ devices.

    • Name: Angela Lin
      Supervisor:听Maitreyee Roy

      Epiretinal membrane (ERM), a prevalent eye condition primarily affecting the elderly, is characterised by fibrocellular tissue on the retina's inner surface. While Optical Coherence Tomography (OCT) has long served as the conventional method for ERM detection, the assessment process remains a formidable and time-consuming challenge for ophthalmologists. Recent advancements in the medical field have witnessed a transformative integration of deep learning-based artificial intelligence (AI) in the diagnosis of ERM. This innovative approach facilitates detecting and staging common ocular disorders, such as ERM, which possess distinctive features. This study delves into the research papers that have explored the capabilities of various AI models in ERM determination and conducted comparative analyses of their performance. The findings across these studies are remarkable, underscoring the AI models' superior performance metrics, including accuracy, specificity, and sensitivity in ERM diagnosis when compared to traditional ophthalmological assessments. In essence, the research unequivocally demonstrates that AI models exhibit a significantly enhanced capability to detect and diagnose ERM, thus presenting an advancement in the field of ophthalmology.

  • Posters

    • Name: Peta Gilbert
      Supervisor: Grace Lindner and听
      Dr Michael Janitz

    • Name: Karina Guo
      Supervisors: Jason Bragg and Will Cornwell

    • Name:听Carmen Ossimitz
      Supervisors:听Jai Tree, Thomas Zammit and Brandon Sy

  • Presentation Abstracts

    • Name: Vanessa Prajitno
      Supervisor:
      Dr. Blake Cochran & Dr. Kerry-Anne Rye

      Type 1 Diabetes (T1D) is a metabolic autoimmune disease caused by pancreatic 尾-cell dysfunction as a result of immune system disorders. Viral infections such as SARS-CoV-2 may induce activation of inflammatory chemokines which precipitates to chronic inflammation that may aggravate 尾-cell dysfunction as the patient鈥檚 immune system starts to produce auto-antibodies against virally infected 尾-cells. Reduced 尾-cell functions cause lower expression of insulin, resulting in persistent hyperglycaemia. However, studies have found that 尾-cell dysfunction can be mitigated by HDL apolipoprotein mimetic peptides such as D6PV. We demonstrated this by using NOD mice to analyse D6PV treatment efficacy, measuring blood glucose concentration and characterizing the severity of insulinitis in pancreatic islet cells. Our results found a significant reduction of blood glucose levels and less inflammatory infiltrates present in pancreatic islets of D6PV-treated mice, thus indicating that there is great potential in the usage of D6PV to treat patients with T1D.

    • Name: Hugo Sebesta听
      Supervisor:
      Prof. Rajib Rahman and Dr Edyta Osika

      When a particle is constrained in a number of degrees of freedom, it becomes best described by quantum physics. Within this theory, a sufficiently small particle is best described by a wave function, the evolution of which is determined with Schrodinger鈥檚 equation. The quantum dot is a 1D approximation of an electron constrained in all three dimensions, such as at a phosphorus impurity in a silicon lattice. Such a quantum system can be described as 鈥渢wo-level鈥, making it relevant in the quantum computing scene. I have performed several typical calculations relating to this system, showcasing some important quantum effects and ideas including Hamiltonians, anticrossing and detuning, time evolution with a changing electric field (loosely simulating some interaction) and resonance-driven quantum state transitions between the computational base states.

    • Name: Yingze (Rita) Lyu
      Supervisor:
      Dr. Benjamin Montet听

      Star spots are areas of the reduced surface caused by magnetic fields inhibiting the process of convection or the transfer of heat due to the movement of plasma within a star. They appear as dark patches on the photosphere of stars, so it reduces the star鈥檚 overall brightness. Therefore, star spot activities may lead to erroneous planetary properties for transiting exoplanets. This may provoke false planet detections and reduce the precision of astrometry. In my research project, I have developed a python function that calculates the astrometric shift of the photometric centre of light caused by their star spots and used real-life sunspot data to test and validate the function.

    • Name: Felix Lempriere
      Supervisor:
      Scott Kable

      Prior experimental investigations of the roaming photodissociation of formaldehyde (H2CO -> CO + H2) through Velocity Map Imaging (VMI) of the dissociating CO fragment revealed anisotropic behaviour in the velocity distributions. This anisotropic behaviour is linked to the correlations between the v, J and 渭 vectors which in turn describe the mechanism behind the molecular reaction. An energy-dependent change in these correlations indicates potential energy-dependent switching between reaction mechanisms. In this project we aimed to determine the energy-dependent anisotropy of previous experimental CO data, to look for patterns in isotropy to guide further experimental investigation of these vector correlations, and better understand the dissociation mechanisms behind formaldehyde roaming.

    • Name: Claudia Tran鈥
      Supervisor: Dr鈥疢aitreyee鈥疪oy鈥

      Keratoconus is鈥痑n eye鈥痙isease of鈥痗hildren & young鈥痑dults,鈥痺here vision is鈥痝radually鈥痙istorted through changes to the front surface of the eye. There is limited鈥痵uccess鈥痙etecting keratoconus鈥痠n鈥痩ess equipped clinics,鈥痵o the鈥痑im of the鈥痯roject is to鈥痙evelop鈥痑鈥痭ecessary鈥痵creening鈥痶est.鈥疘 have been involved in the conceptual development of SPARK,鈥痑nd I hope鈥痶o present鈥痶he work so far鈥痑t the鈥痗onference.鈥疭PARK鈥痠nvolves鈥痶he use of a smartphone and contact鈥痩ens鈥痶o鈥痙etect keratoconus,鈥痷sing MATLAB to simulate鈥痶he鈥痵urface of the eye.鈥

      I was fortunate鈥痶o work with Dr鈥疢aitreyee鈥疪oy鈥痑nd Jack Gordon,鈥痜ostering an鈥痠ntroductory鈥痷nderstanding of鈥痥eratoconus鈥痑nd machine learning鈥痶hrough literature reviews.鈥疶hese鈥痠nvolved鈥痗oncepts such as鈥痶he鈥痚missions spectra of LEDs鈥&鈥疜枚hler鈥痠llumination,鈥痶he application of decision trees,鈥痶he鈥疌ylite Hyperparallel OCT, as well鈥痶he role of the鈥疊asement鈥疢embrane in keratoconus鈥痙etection.

    • Name: Emily Huynh
      Supervisor:

      Strokes are the cause of death for many people each year and by observing blood supply to the brain, therapies for stroke prevention and treatment can be developed. In particular, the brain鈥檚 response to losing oxygen and being reoxygenated is an interesting area for further research. In this presentation, I consider the significance of a paper published earlier this year that proposed a new model to monitor the brain. Instead of rodent models, which requires complex machinery and techniques, a group of Japanese scientists experimented with Zebrafish. This species has transparent larvae and has many advantages in terms of management, monitoring and data collection.

    • Name: Jessica Whetters
      Supervisor:
      Richard Vickery & Ingvars Birznieks

      Electrical stimulation is a core tenant of research in sensory neurophysiology, as it allows the measurement of neural responses and the testing of specific variables on the sensation of touch. One form of electrical stimulation is Transcutaneous Electrical Stimulation (TENS) 鈥 a method which uses electrodes (often silver chloride) placed on the skin to deliver repetitive electrical pulses. Previous research demonstrates that nerve impulses tend to 鈥榝use鈥 and plateau in response to TENS frequencies of 80-100Hz, demonstrating the inability of TENS to consistently recruit afferents at high frequency. To determine if this is the result of stimulus issues or physiology of nerve afferents, I will do a literature review of the current research 鈥 particularly focusing on how repetitive stimulation of frequencies 100Hz and upwards affects nerve recordings as SNAP recordings. I will also explain the relevance of this question to the research being conducted in Richard and Ingvars鈥 lab.

    • Name: Kaya Dahlke
      Supervisor:
      Dr Michael Janitz

      mRNA transmits information so cells can make proteins from the information contained in DNA. Mature mRNA has a chain of Adenine bases at its end for protection called a poly A tail. I used data collected using nanopore sequencing to compare the poly A tail length distribution between healthy uterus tissue and endometrial cancer. I did this for the full distribution, as well as for only the mitochondrial mRNA. I also compared the poly A tail length at different points along the chromosome between healthy and cancerous tissue. The aim of this was to cross check that the sequenced data was correct and follows known patterns.

    • Name: Konstantina Harellis
      Supervisor:
      Dr Dominic Glover

      As part of the iGEM 2021 黑料网大事记 PROTECC Coral team, we investigated two systems that could be used to improve the thermotolerance of the algal species Symbiodinium goreaui. Elevated ocean temperatures due to global warming result in the production of reactive oxygen species (ROS) in the algal species which get released and disrupt the coral-algae symbiotic relationship. The ROS result in the expulsion of the algae from the coral host, leading to the starvation of the host and subsequent coral bleaching. Our proposed glutathione system aims to neutralise ROS and hence prevent the expulsion of the algae. Additionally, the introduction of small heat shock proteins in the algae prevents protein aggregation and denaturation that might occur in higher temperatures. Therefore, introducing these two systems could hypothetically increase thermotolerance and prevent coral bleaching. This is what our research tested and what I will present in the TSP conference.

    • Name: Bethany Yee
      Supervisor:
      Lawrence Lee

      Nature has been able to optimise biochemical reactions by bringing together, or colocalising, natural catalysts called enzymes. These structures are called multi-enzyme complexes (MECs). While there has been research into designing synthetic MECs that could be tailored for specific reactions there has been little work in using base-pairing complementarity between RNA as a scaffold and RNA-binding proteins. This would allow the structures to be modular, highly controlled and be able to self-assemble in vivo. Through Molecular Dynamic Simulation, Pymol and kinetic modelling we assessed the validity of RNA scaffolds and fine-tuned a MEC design based of the biochemical pathway of the cofactor f420. Further research will involve expressing the MEC in both in vitro and in vivo experiments in order to construct and characterise the function and synthesis of the multi-enzyme complex.

  • Posters

    • Student: Konstantina Harellis

      As part of the TSP Student Conference, I decided to create and present a poster about cellular reprogramming