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Extension of holomorphic vector bundles across a totally real submanifold
No full textLet ϵ be a Hermitian-holomorphic vector bundle with compatible Chern connection ▽, defined on the complement of Rn inside a polydisc Δ ⊇ Cn. The main result of this notes provides a necessary and sufficient condition for unique extension of ϵ to Δ, namely that the curvature F▽, when contracted with a non-vanishing holomorphic vector field ξ, is ∂-exact. Applications to removable singularities for anti-self-dual connections across a real time line in C2 and solutions of the static monopole equation across a point in R3 are also given as corollaries
Density Functional Theory Studies of MXene-Based Nanosensors for Detecting Volatile Organic Compounds in Meat Spoilage Assessment
No full textEmission of selected volatile organic compounds (VOCs), such as methylamine (MA), dimethylamine (DMA), and trimethylamine (TMA), is associated with certain microbial reactions, causing intrinsic decomposition and spoilage of meat and fish. Efficient detection of MA, DMA, and TMA is vital for meat and fish spoilage assessment. Here, density functional theory (DFT) calculations are used to study the sensing properties of selected MXene monolayers (M2CTx; M = Ti, Nb, V; Tx = O, OH, F) toward MA, DMA, and TMA. We found that the binding energies of MA (−0.29 to −1.08 eV), DMA (−0.39 to −1.15 eV), and TMA (−0.28 to −1.19 eV) on M2CTx are ideal for reversible sensing. Appropriate binding of these VOCs is associated with measurable changes in the electronic properties of M2CTx, which is essential for a highly efficient sensing mechanism. Further, we used the Langmuir adsorption model to explore the sensing characteristics of M2CTx monolayers in varied temperature and pressure environments. Among the studied systems, Nb2C(OH)2 exhibits excellent sensing capabilities toward DMA and TMA at concentrations below parts per million (ppm), whereas Nb2CF2 exhibits selective adsorption of MA at concentrations below ppm. We strongly believe that our findings will pave the way for the development of highly sensitive nanosensors for monitoring the spoilage of meat and fish products
Commentary: Genome Sequence of Vibrio parahaemolyticus VP152 Strain Isolated From Penaeus indicus in Malaysia
No full textVibrio parahaemolyticus is a marine gram negative bacterium that has been gaining significant attention in the shrimp aquaculture industry given its direct association with early mortality syndrome (EMS) or acute hepatopancreatic necrosis disease (AHPND) in shrimps (Soto-Rodriguez et al., 2015). Despite its significant threat to the industry, the genomic representation of shrimp-associated V. parahaemolyticus isolated from Malaysia or South East Asia in general is relatively low (Kondo et al., 2014; Yang et al., 2014; Foo et al., 2017). Letchumanan and colleagues recently reported the draft genome of V. parahaemolyticus VP152 isolated from a banana prawn in Malaysia (Letchumanan et al., 2016b). Strain VP152 was sequenced on the Illumina MiSeq and its whole genome sequence was deposited in DDBJ/EMBL/GenBank under the accession number and Bioproject ID of LCUL01000000 and PRJNA281142, respectively
Amyloid Precursor Protein Is Required for Normal Function of the Rod and Cone Pathways in the Mouse Retina
No full textAmyloid precursor protein (APP) is a transmembrane glycoprotein frequently studied for its role in Alzheimer's disease. Our recent study in APP knockout (KO) mice identified an important role for APP in modulating normal neuronal development in the retina. However the role APP plays in the adult retina and whether it is required for vision is unknown. In this study we evaluated the role of APP in retinal function and morphology comparing adult wildtype (WT) and APP-KO mice. APP was expressed on neuronal cells of the inner retina, including horizontal, cone bipolar, amacrine and ganglion cells in WT mice. The function of the retina was assessed using the electroretinogram and although the rod photoreceptor responses were similar in APP-KO and WT mice, the post-photoreceptor, inner retinal responses of both the rod and cone pathways were reduced in APP-KO mice. These changes in inner retinal function did not translate to a substantial change in visual acuity as assessed using the optokinetic response or to changes in the gross cellular structure of the retina. These findings indicate that APP is not required for basic visual function, but that it is involved in modulating inner retinal circuitry
Updating a Model of Meat Demand in Australia to Test for the Impact of MSA
No full textEmpirical systems of equations modelling approaches were used to (i) try and ascertain the impacts of MSA graded meat on domestic quantities of meat demanded and to (ii) generate updated estimates of consumer responses to price and expenditure changes with respect to domestic retail meat demand. Little evidence was found to suggest that aggregate consumer preferences have changed since the introduction of the MSA grading scheme. However, consumer demand for beef, lamb and pigmeat has become less responsive to changes in their respective prices in recent years. The data compiled for this project provides an updated and consistent set of data that can be used to examine other influences on Australian domestic meat demand
The Consumers' Choice of Purchasing Location and the Preferences for Beef in Yogyakarta
No full textThis study aims to analyze the consumer preferences about choosing a place to buy beef and beef attribute product influence in buying decision of consumers in Yogyakarta. There were 300 beef consumers selected near traditional markets, butcher or meat shops, supermarkets, restaurants and food stalls for the survey using the questionnaire. The data were analyzed descriptively, and used the chi-square test to evaluate the relationship between demographic characteristics and the consumers' choice of place when buying beef in Yogyakarta. The study reveals that most respondents buy beef at butcher or meat shops, followed by traditional markets and supermarkets. Consumers consider price, top quality of beef, the freshness of the product, shopping convenience and friends with sellers as the top five reasons when they choose a place to buy beef. Further, there is no correlation between demographic aspects with consumer preferences in choosing a place to buy beef. Finally, the beef attributes consumers consider when buying beef are the halal slaughtering method, bright red colour, quality assured and beef cuts
Quantitative differences in rumen epithelium proteins and detection of lysine acetylation in lambs fed a low or high metabolizable energy diet
No full textThirty-six Merino wethers (10-month-old) were fed ad libitum for 30 days two diets;1) low metabolizable energy diet (LME; 30% lucerne: 70% cereal chaff) and 2) high ME diet (HME; 40% rolled barley grain: 50% lucerne: 10% cereal chaff). Effects of diet on dry matter intake (DMI), metabolizable energy intake (MEI), liveweight (LWT), average daily gain (ADG), carcass lean or fat gain, liver and empty rumen weight and plasma metabolites were analysed. A membrane enriched protein fraction of rumen epithelium isolated enzymatically from whole depth rumen wall was quantified for each sheep using tandem mass tag mass spectrometry (TMT MS). The presence or absence of acetylation of lysine residues on identified proteins was counted and the position of the lysine acetylation recorded. In lambs fed the HME diet, DMI (PPPPPPPP
Musical Worlds: Intertextual Representations of the Works of Author, L.M. Montgomery
No full textWhether music contains essential meaning is contested within academic discourse. To examine, investigate and utilise music’s many functions within society, music is assigned various contextual meanings and consequently, meaning in music is always constructed. This research project involves constructing such meaning and exploring through the creative practice of composition the ways in which music can relate to literary media, specifically the literary works of author, L.M. Montgomery and the themes found within her work. Montgomery’s work, including the intertextual relationship between her novels and her private journals, has continued to be academically explored since the journals were published in the mid-1980s. Although numerous adaptations of her novels have been produced, including television series, movies and stage musicals, the music in these adaptations participates in the overall screen or stage narrative. Using an arts-based research methodology, this creative project has produced a folio of contemporary art music composed for acoustic instruments that intertextually represents the worlds created by Montgomery. Conceptual frameworks of intertextuality and hermeneutics have been employed during the textual analysis of Montgomery’s novels and journals and a hybrid of deductive and inductive coding with a descriptive approach aided identifying themes in her work. These prominent themes formed the basis of the compositions. This research will continue the growing academic work around Montgomery and broaden the field to include non-traditional research in music, as well as provide a new adaptation of Montgomery’s literature
The Effect of 1-MCP on Grain Size and Yield-Related Traits of Eragrostis tef
No full textTef is an Ethiopian cereal that has the potential for increased global production. However, as a very small-seeded grain, it experiences high levels of post-harvest loss. As ethylene is reported to have a negative effect on grain size, this study sought to test whether 1-methylcyclopropene (1-MCP), an ethylene action inhibitor, is a suitable molecule to improve grain size of tef as well as to determine the optimum application time and concentration. The 1-MCP treatment was evaluated on well-watered plants as well as plants subjected to moderate water stress, with the stress treatment imposed one week before the expected flowering date. Application of 1 PPM 1-MCP to individual panicles improved grain size and thousand-grain weight (TGW) by 22% and 29% under moderate water stress and 10% and 16% under well-watered conditions, respectively. It also increased yield per panicle. However, when applied to whole plants, it was not effective, due to the extended flowering time of tef and differing responses of panicles at different developmental stages. These observations suggest that genetic modification leading to lower production of endogenous ethylene could benefit grain size in tef. However, 1-MCP treatment is unlikely to be effective in the field