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Showing 1 to 20 of 23 for “"PEK"”.

  1. The preparation and characterization of PEK/TEOS glasses by the sol-gel method

    Noell, John Lee WatsonVirginia Tech1987

    … system prepared by this procedure is the new PEK/TEOS glasses. The PEK represents the bisphenol-A polyarylene ether either ketone thermoplastic polymer endcapped with triethoxysilane functional groups. By mixing the PEK and TEOS components at different weight compositions in the starting …

    vt Repository record

  2. Physiological IRE-1-XBP-1 and PEK-1 signaling in Caenorhabditis elegans larval development and immunity

    Kinkel, Stephanie AMassachusetts Institute of Technology2012

    … mechanism, mediated by IRE-1, PERK- 1/PEK-1 and ATF-6 in metazoans, resolves an overcrowded ER lumen in part through the increase of protein degradation and folding. Typical studies focus on activation of the UPR in response to characterized chemical agents that potently alter ER …

    mit Repository record

  3. Investigating The Role of Pancreatic eIF2-alpha kinase (PEK) In DLK/ Wallenda (Wnd)-mediated Neurodegeneration In Drosophila

    Quagraine, Yaw Acquaah2025

    … Response (UPR) kinase Pancreatic eIF-2α kinase (PEK) and the Dual Leucine Zipper Kinase (DLK) signaling kinase Wallenda (Wnd) are important regulators of neuronal health and neurodegeneration. Although these two (2) kinases are very important, their interaction in degenerative and regenerative …

    unr Repository record

  4. From Turkeys To Tamales: Paleoindian To Preclassic Period Faunal Use At Maya Hak Cab Pek Rockshelter In Southern Belize

    Orsini, Stephanie Raye2019

    … excavations at the rockshelter Maya Hak Cab Pek (MHCP). The site has evidence for human activities from the Paleoindian period (11,500 BC to 8,000 BC) through the Preclassic Maya period (2,000 BC to AD 250). This research uses zooarchaeological analysis to investigate animal use in the …

    mississippi Repository record

  5. Synthesis and characterization of polyether-ester liquid crystalline polyesters and poly(arylene ether ketone)-lcp segmented copolymers

    Waehamad, Wae-asaeVirginia Tech1991

    … engineering polymer, poly(arylene ether ketone)(PEK) were successfully synthesized. The synthetic method was somewhat similar to that of carboxyl terminated poly(arylene ether sulfone) oligomers. The PEKCOOH oligomers were quantitatively endcapped and their molecular weights could be controlled. …

    vt Repository record

  6. Gas permselectivity in amorphous linear and crosslinked poly(arylene ether ketones)

    Skischally, Silvia ParisiVirginia Tech1990

    … film of amorphous Poly(Arylene Ether Ketones) or PEK. The methodology for the preparation of crosslinked maleimide terminated PEK (or MIPEK) films from several blend ratios of different molecular weights of MIPEK is discussed in detail. The primary focus of this work has been to investigate the …

    vt Repository record

  7. An Investigation Into the Properties and Fabrication Methods of Thermoplastic Composites

    Livingston-Peters, Ann E2014

    … commonly used in industry. Polyaryletherketones (PEK) have high service temperatures, good mechanical properties, and improved processing capabilities compared to thermoplastics used in the past making them important to the aerospace industry. The wide range of types of PEK make them suitable for …

    calpoly Repository record

  8. Investigating the role of the Caenorhabditis elegans unfolded protein response in immunity and development

    Richardson, Claire EMassachusetts Institute of Technology2012

    … ER localized transmembrane sensors IRE-1, PERK/PEK-1, and ATF6/ATF-6. The molecular mechanisms and output of the UPR have been defined largely by exogenously inhibiting ER protein folding, either chemically or through overexpression of unfoldable mutant ER proteins, while genetic studies have …

    mit Repository record

  9. Genetic analysis of the neuronal integrated stress response in developmental plasticity and organismal physiology of C. elegans

    Kulalert, WarakornMassachusetts Institute of Technology2017

    … and approaches that led to identification of the PEK-1/PERK branch of the UPR, functioning in a pair of chemosensory neurons, as a novel regulator of the dauer developmental decision. Chapter III will examine the systemic effects of eIF2[alpha] phosphorylation, downstream of PERK/PEK-1 activation, …

    mit Repository record

  10. XX. Yüzyılda Amerika Birleşik Devletleri'nde Selefîlik

    Aygın, Münire GözdeSosyal Bilimler Enstitüsü2019

    … olmak üzere İslamcılık, Vehhâbîlik gibi pek çok diğer kavramla siyâsî menfaatler gözetilerek özdeşleştirilmiştir. Amerika Birleşik Devletleri Selefîlerinin ise kendilerini Selefîliğin yanı sıra, İslâmî kökenci, Ehl-i Âsâr, Ehl-i Hadîs ve Vehhâbî olarak anmaktadırlar. Suudî Arabistan …

    ankara Repository record

  11. 4734 sayılı Kamu İhale Kanunu bağlamında ihaleye konu edilebilecek hizmetlerin belirlenebilirliği

    Kılıç, HarunAnkara : Ankara Üniversitesi : Sosyal Bilimler Enstitüsü : Hukuk Fakültesi : Kamu Hukuku Ana Bilim Dalı2020

    4734 sayılı Kanun, pek çok kayda değer yenilikle birlikte yürürlük kazanmış, bu yönüyle de kamu ihale tarihinde haklı bir yer edinmiş olsa da hizmetler özelinde hep sorunlu bir Kanun olagelmiştir. Bunun temelde iki nedeni vardır. İlki, kapsamdaki hizmetlere belirliliğin, ismen sayılan birkaç hizmet …

    ankara Repository record

  12. S10 silikon plastinasyon tekniği aşamalarında kas dokusunda meydana gelen renk değişimlerinin kantitatif olarak değerlendirilmesi

    İnsal, BurcuSağlık Bilimleri Enstitüsü2017

    … bozulmadan korunmasını sağlamak için kullanılan pek çok prezervasyon tekniği bulunmaktadır. Geçmişten günümüze kadar ki süreçte bilim adamları, organların ve tüm vücut kadavraların, renk, koku, doku gibi duyusal özellikler ve esneklik bakımından mümkün olduğunca canlı hayvan dokularına benzer …

    ankara Repository record

  13. Composing Malaysian popular music for the Orchestra in the early 21st century

    Pek, I.Middlesex University2021

    This music composition practice-based thesis is aimed at documenting and analysing my professional context as a popular music orchestral composer in Malaysia. Out of the 120 minutes of music I had composed, conducted and recorded during my doctoral study in London, I have selected four pieces to be …

    middlesex Repository record

  14. Automated deductive verification of systems software

    Pek, EdgarUniversity of Illinois at Urbana-Champaign2016

    Software has become an integral part of our everyday lives, and so is our reliance on his correct functioning. Systems software lies at the heart of computer systems, consequently ensuring its reliability and security is of paramount importance. This thesis explores automated deductive verification …

    uiuc Repository record

  15. High performance polymeric networks and thermoplastic blends: microwave versus thermal processing

    Hedrick, Jeffrey C.Virginia Tech1990

    … of functionalized poly(arylene ether ketone)s (PEK) has also been demonstrated. PEK's are typically classified as high performance thermoplastics; however, with the appropriate terminal functionalities these ductile thermoplastics may also be transformed into tough, solvent resistant networks. …

    vt Repository record

  16. Ekolojik dünya tasarımı: Medya ve reklamcılık endüstrisinde sürdürülebilirliğin temsili ve alımlanması üzerine karşılaştırmalı bir analiz

    Akarsu, EsraAnkara Üniversitesi2024

    … ve enerji krizi ile zorunlu iklim göçleri gibi pek çok sıkıntıyı getirirken, buna bağlı olarak eşitsizliği ve belirsizliği dünya genelinde pekiştirmektedir. İnsan çağında insan kaynaklı tahribattan ve politik iktisadi sistemin hasarlarından az veya çok tüm ülkeler etkilenecektir. Bu nedenle …

    ankara Repository record

  17. Reflectance spectroscopy system for real time and non-invasive detection of transcutaneous bilirubin level

    Ong, Pek EkUniversiti Tun Hussein Onn Malaysia2018

    Blood bilirubin level would be elevated when one's liver is unable to remove bilirubin sufficiently from the blood. The conventional methods used for monitoring and measuring the bilirubin level are time consuming, tedious and invasive in nature. This study aims to investigate the feasibility of …

    uthm Repository record

  18. Compositional Exploration and Microstructural- Environmental Evaluation of Alloys for Glass Vitrification Applications

    Pek, Ming EnUniversity of Cambridge2025

    This thesis investigates the multi-environment performance of alternative alloys for high-temperature glass vitrification, with the aim of improving the durability of Co-101 alloy spinners used in glass mineral wool production. These components operate under aggressive thermal and chemical …

    cambridge Repository record

  19. On the development of new PolyArylEtherKetone bulk solids for Powder Bed Fusion

    Richard Davies (21068291)2026

    … Ltd, including Victrex™ PEEK 450PF, Victrex™ PEK HT22PF and developmental LMPAEK™ were received in fine powdered form. Ten of the grades were split and thermally pre-processed to improve flow and bulk density, creating a total group of twenty-four powder bulk solid candidates for study. Each …

    exeter

  20. Part I. Cleavage of Carbamates to Isocyanates: Selectivity, Extension to the Solid Support, and Synthesis of Multivalent Glycoforms With Inter-Saccharide Carbamate Linkages. Part II. Conjugation of Carbohydrate Moieties to a Rigid Aromatic Linker for the Study of Glycoside Internal Dynamics

    Chong, Pek Y. ChristineUniversity of Illinois at Urbana-Champaign2015

    Part II. A synthetic protocol for the synthesis of carbohydrate-linker moieties that will allow conjugation of a saccharide to a protein is reported. This approach was demonstrated in the synthesis of the saccharide-linker moieties of the four glucopyranosyl-beta-D-glucopyranosides. The results …

    uiuc Repository record

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