Essays about: "pigment cells"

Showing result 1 - 5 of 7 essays containing the words pigment cells.

  1. 1. Body patterning and cognition in cephalopods - a literature review

    University essay from SLU/Dept. of Animal Environment and Health

    Author : Georgina Chu; [2023]
    Keywords : cephalopods; octopus; body patterning; colour alteration; chromatophores; pigment cells; cognition; learning and memory;

    Abstract : Cephalopods are a valuable model for studying the evolution of cognition due to their distinctive brain structure, organisation, and connectivity patterns compared to vertebrates. The development of large brains and behavioural complexities are believed to be triggered by evolutionary pressures stemming from factors like heightened predation, more demanding foraging conditions, and intense mating competition. READ MORE

  3. 2. Vitiligo image classification using pre-trained Convolutional Neural Network Architectures, and its economic impact on health care

    University essay from KTH/Hälsoinformatik och logistik

    Author : Nour Bashar; MRami Alsaid Suliman; [2022]
    Keywords : Vitiligo; deep CNN architectures; Image classification; pre-trained models; dataset; AUC; economic impact.; Vitiligo; djupa CNN-arkitekturer; bildklassificering; förtränade modeller; dataset; AUC; ekonomisk påverkan.;

    Abstract : Vitiligo is a skin disease where the pigment cells that produce melanin die or stop functioning, which causes white patches to appear on the body. Although vitiligo is not considered a serious disease, there is a risk that something is wrong with a person's immune system. READ MORE

  4. 3. Study of the vibronic mixing in chlorophylls with multidimensional spectroscopy

    University essay from Lunds universitet/Kemiska institutionen

    Author : Ignacio Martínez Casasús; [2021]
    Keywords : Two-dimensional spectroscopy; Ultrafast spectroscopy; Chlorophyll a; Chlorophylls; Photosynthesis; Light harvesting; Vibronic mixing; Quantum coherence; Chemical physics; Chemistry;

    Abstract : Chlorophylls comprise one of the most important families of molecules for the photosynthetic process. Chlorophyll-like molecules have been classically interpreted under the Gouterman model, being thought to feature two independent transitions, Qy(S1) and Qx(S2). READ MORE

  5. 4. Fate and Transport of Nano-TiO2 in Saturated Porous Media: Effect of pH, Ionic Strength and Flow Rate

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Tsegay Mengestab; [2015]
    Keywords : Nanoparticles; TiO2; saturated porous media; transport; DLVO theory;

    Abstract : Titanium dioxide nanoparticles are widely used in a variety of products, such as pigments, paints, paper, plastics, cosmetics, nano-fibers, food coloring and photovoltaic cells, and the industry is growing at anexponential rate. It is believed that by 2025, 2.5 million tons of nano-TiO2 will be manufactured annually. READ MORE

  6. 5. Structural and functional analysis of violaxanthin de-epoxidase

    University essay from Lunds universitet/Kemiska institutionen

    Author : Kuo Guo; [2013]
    Keywords : Proteinvetenskap; Protein Science; Chemistry;

    Abstract : Non photochemical quenching (NPQ) is an important way for plants to protect themselves from photooxidative damage. In higher plants, the major and most rapid part of NPQ is qE, which is controlled by the Violaxanthin de-epoxidase (VDE) and zeaxanthin epoxidase (ZE). VDE converts Violaxanthin (Vx) to Antheraxanthin (Ax), and then to Zeaxanthin (Zx). READ MORE