Search for dissertations about: "pu"

Showing result 1 - 5 of 78 swedish dissertations containing the word pu.

  2. 1. Dynamical Analysis of Chemical Activity of Sterically Encumbered Lewis acid/base Pairs

    Author : Maoping Pu; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : This licentiate thesis is about the dynamics analysis of chemical reactions involving a stoichiometric mixture of sterically hindered Lewis base (LB) and Lewis acid (LA) – the so-called frustrated Lewis pairs (FLPs). The tool for dynamical description of chemical reactions is the ab initio molecular dynamics (AIMD) simulations together with the calculation of minimum energy paths (MEPs) on the potential energy surfaces (PESs). READ MORE

  4. 2. Human ovarian follicles and oocytes : collection, cryopreservation, culture and gene expression

    Author : Pu Zhang; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Ovarian follicle; oocyte; follicular aspirate; organ culture; cAMP; cGMP; cryopreservation; microarray; human gene expression; embryonic stem cell; preimplantation;

    Abstract : Infertility affects approximately 15% of couples globally. The most effective treatment today is in vitro fertilization. However, not all couples can be helped with the current techniques. To achieve better success, techniques of storage and in vitro maturation of ovarian follicles have to be improved. READ MORE

  5. 3. A molecular exploration of sensory responses in c. elegans

    Author : Longjun Pu; Changchun Chen; Simon Tuck; Sara I Wilson; Zhiyong Shao; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; C. elegans; sensation; CRISPR Cas9; G protein-coupled receptors; neuropeptides; acute hypoxia; pathogen; chemosensation; hydrogen sulfide; HIF-1; iron;

    Abstract : Sensation provides a pivotal ability, allowing animals to survive in complex environments. The cues sensed by animals are represented by external stimuli and internal signals. However, the mechanisms mediating sensations in molecular and cellular level are still not well-studied. In this thesis, by using free-living nematodes C. READ MORE

  6. 4. Molecular Motion in Frustrated Lewis Pair Chemistry: insights from modelling

    Author : Maoping Pu; Timofei Privalov; Todd Martinez; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; CO2 capture; hydrogen activation; molecular motion; ab initio molecular dynamics; frustrated Lewis pair; quantum chemical modelling; reaction mechanism; Organic Chemistry; organisk kemi;

    Abstract : Mechanisms of reactions of the frustrated Lewis pairs (FLPs) with carbon dioxide (CO2) and hydrogen (H2) are studied by using quantum chemical modelling. FLPs are relatively novel chemical systems in which steric effects prevent a Lewis base (LB) from donating its electron pair to a Lewis acid (LA). READ MORE

  7. 5. Theory of transformation optics and invisibility cloak design

    Author : Pu Zhang; Sailing He; Hao Yang; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Transformation optics; Maxwell’s equations; invisibility cloak; half-space cloak; reduced cloak; inverse transformation; carpet cloak; Electrical engineering; Elektroteknik;

    Abstract : Research on metamaterials has been growing ever since the first experimental realization of double negative media. The theory of transformation optics provides people with a perfect tool to make use of vast possibilities of the constitutive parameters for metamaterials. READ MORE