9 DOCTORAL THESIS

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Doctoral Thesis 545

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Disclosing the Congestion Paradigm: A Critical Study of Urban Density in Shenzhen and Hong Kong

This dissertation investigates the paradigm shift in urban development where congestion, traditionally viewed as a pathological condition of cities, emerges as a deliberate strategy chosen in contemporary Asian megacities as a tool for fostering innovation and cultural vitality. In this context, congestion is defined not merely as the physical compression of urban space and bodies, but as a complex socio-spatial condition where extreme density generates new forms of urban organization, soc...

Bio-Based Materials: Advancing in Synthesis of Biopolymers and in Natural Fiber Composites

Nowadays, the concept of sustainability in the production of polymeric materials suitable for industrial and biomedical applications has assumed considerable importance and interest from the world of scientific research. The excessive use of fossil-based raw materials and the issues that arise from the manufacturing process of these contributes to increasing the global warming. In this regard, attention has shifted towards using bioresources and sustainable processes that promote the dev...

Development of Biopolymer-based Multifunctional Delivery Systems for Combination Cancer Therapy and Diagnosis

Cancer remains one of the most complex and life-threatening diseases, necessitating the development of advanced drug delivery strategies for effective treatment. This thesis explores the design and development of biopolymer-based multifunctional delivery systems tailored for combination cancer therapy and diagnosis. Utilizing natural biopolymer like hyaluronic acid (HA) and oligosaccharide like cyclodextrin (CD), both hydrogel-based and nanogel-based delivery platforms were formulated to...

Coordination chemistry of N-heterocyclic carbene gold complexes and their catalytic and anticancer activities

Over the past two decades, N-heterocyclic carbenes (NHCs) have gained significant attention as ligands, offering a versatile alternative to traditional phosphorus-based (e.g., phosphines, phosphites) and nitrogen-based (e.g., amines, imines) ligands. NHCs have been extensively studied in coordination chemistry, particularly for their strong σ-donor properties, making them exceptional ligands for coinage metals, especially gold(I). NHC-gold(I) complexes, with gold in a d10 electronic confi...

Acidity in coffee: a flavoromics approach comparing multiple extraction methods

This PhD thesis investigates coffee acidity through a multidisciplinary approach combining chemical analyses and sensory evaluation. Four main experiments were carried out. In experiment 1, a new analytical method using solid-phase extraction (SPE) and HPLC-DAD was developed and validated to quantify organic acids, chlorogenic acids and caffeine in espresso coffee. The method was applied to C. arabica samples with different roasting levels (light, medium, dark) to study chemical changes...

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