Materials Literature
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Abstract Metastatic breast cancers are treated with chemotherapy drugs in clinic. However, patients usually develop therapy resistance quickly due to intrinsic and acquired mechanisms. Poor drug delivery to tumor cells may also contribute to therapy resistance. To address both biological and mass transport barriers to…
Nano-, micro- and macroporous ion-exchangers based on renewable vegetable raw materials have been synthesized by two-step process including catalytic o-alkylation of pine sawdust with epoxide resin ED-20 and subsequent amination of formed α-oxide derivative. The optimal conditions of synthesis, composition, structure…
Zusammenfassung Ein methodisch neuer Ansatz zur Charakterisierung der Feststoffphase in Suspensionen mit Ultraschall wird vorgestellt. Gegenüber bekannten Transmissionsverfahren ermöglicht die Messung in Reflexion auch die Analyse höher konzentrierter Stoffsysteme. Mit der inline aus dem Schallsignal abgeleiteten Info…
Nanomaterials are materials in which 50% or more of the contained particles are in the range of 1 nm to 100 nm. They have several potential clinical applications, including antithrombotic therapy, cell therapy, treatment of atherosclerosis, drug delivery, and nanorods for induction of angiogenesis. This article discus…
Abstract Quantum-chemical calculations at the RHF/6-31G(d) and MP2/6-31G(d) levels of two stable structures of 1,3-diphenyl-3-methyl-3-(trichlorogermyl)butanone-1 molecule were executed. According to calculations at the RHF/6-31G(d) level, the structure with pentacoordinated Ge atom is by 7.49 kJ/mol energetically mo…
Xylene is one of the materials that could be used for synthesis of different carbon nanoparticles including perfect carbon spheres with diameters of 1 to 8 microm and ellipsoids. Its changes in the course of the pyrolytic process in a hermetically sealed stainless steal container have been examined by stopping the pro…
Zusammenfassung Vorgestellt wird eine elektrochemische Messzelle als Bestandteil eines neuartigen Messsystems für Korrosionsuntersuchungen am Bewehrungsstahl von Stahlbetonbauwerken. Es wurde eine konstruktive Lösung für eine Aufsatzzelle gefunden, mit der der Anwender in der Lage ist, in Kombination den Zustand der B…
The effective algorithm of static calculation of geometrically nonlinear compound thin structures is offered. Linear differential equations of moment theory are used. Nonlinearity is considered by assigning unknown initial angular displacement of each segment retaining the form of the generating line. Unknown values o…
Various gold nanomaterials are successful obtained using a mild and simple chemical approach, involving the use of gold halide and lithium tert-butoxide in organic solvents. It was found that the presence of bromide ions in a polar solvent is required to produce faceted gold nanoparticles such as nanorods/nanowires. T…
The progress of solid-state physics for the past half a century is reviewed in view of theory, materials, and experiments. The entry point for the review is the development of density-functional theory (DFT) in 1964, which ushered the so-called rst-principles computational electronics. The review mainly focuses on two…
Abstract Background: Brain metastases (BM) represent an important cause of morbidity and mortality from breast cancer (BC). Whole brain radiotherapy (WBRT) remains the most widely used treatment, especially for pts with multiple intracranial lesions. The purpose of this study is first, to analyze the clinical characte…
Haydeh, Ob; Wennberg, Mb; CarlswärdKjellin, Ab; Gezelius, Bc; Blom, Ac; Landén, Ma,b,c Author Information
In this study, we have investigated the effects of Mn and Co co-doping on defects, J-E curves and grain boundary characteristics of ZnO-Bi2O3 (ZB) varistor. Admittance spectra and dielectric functions show two bulk defects of Zn ·· (0.17∼0.18 eV) and V· (0.30∼0.33 eV). From J-E characteristics the nonlinear coefficien…
Dendrimers, highly branched spherical polymers, are known for their ability to act as solubility enhancers of various types of drugs. In the present study, we investigated the potential of poly(amidoamine) (PAMAM) dendrimers G1-G4 in concentration from 0 to 10 mg/mL for solubility of two iminodiacetic acid derivatives…
Chaperonins are ubiquitous molecular chaperones that are found in all animal kingdoms. They all share a common structure and function to assist the folding of other proteins. All chaperonins consist of two stacked rings, which come together to form a central cavity where folding can take place. The eukaryotic cytosoli…
최근 들어 광, 온도, pH, 전기, 자성, 압력 등과 같은 외부 환경의 작은 변화에도 반응하여 모양/부피가 변하거나 기계적, 광학적, 전기적, 화학적 특성 등이 가역적으로 바뀌는 스마트 소재에 대한 관심이 높아지고 있다. 이러한 스마트 소재들 중 광조사에 의해 소재의 다양한 특성을 가역적으로 제어할 수 있는 광응답 스마트 소재가 많은 관심을 받고 있다. 본 논문에서는 광에너지를 받아 기계적 에너지로 바로 전환되어 인공근육, 모터 등과 같은 액츄에이터 기능을 할 수 있는 광구동형 스마트 고분자 소재들에 대해 소개하고자 한다. 특히, 광구동형 스마트 고분자 소재 중에…
Bitlis Masifi'ndeki Yolcular Metamorfitleri içinde gözlenen aplit daykları feldispat minerallerince zenginleşme göstermektedirler. Bu çalışmada Bitlis Masifi'nin alt birliğini kesen aplit dayklarının K-feldispat kaynağı olarak kullanılabilirliği araştırılmıştır. Yolcular Metamorfitleri amfibolit, metagranit, paragnays…
Polianilin (PANI) ve PANI/ZnO nanokompozitleri, sırasıyla anilin ve ZnO nanoparçacık ilave edilmiş anilinin kimyasal oksidatif polimerizasyonu ile sentezlenmiştir. ZnO nanoparçacıkları ark-deşarj yöntemi ile sentezlenerek PANI/ZnO nanokompozitlerinin hazırlanmasında kullanılmıştır. ZnO nanoparçacıklarının PANI’nin kar…
New materials always have the possibility of revolutionizing manufacturing processes and the way we live. Bronze, steel alloys, vulcanized rubber, ceramics, and fiber optic cables are just of few of the materials man has discovered which improved his quality of life. One of the more recent additions to the field of ma…
BCP, Mg-BCP, Si-BCP 분말을 공침법(co-precipitation process)을 이용하여 합성하였다. 제조된 분말을 X-선 회절 분석(XRD), 적외선분광분석(FTIR)을 이용하여 특성을 분석하였다. Ca/P 몰 비율이 1.602인 칼슘 결손 아파타이트 공침물을 제조하여 $1000^{\circ}C$ 열처리 과정을 통하여 HAp와 ${\beta}$ -TCP 상이 혼재된 BCP, Mg-BCP, Si-BCP을 합성할 수 있었다. 제조된 분말의 생체활성 거동을 평가하기 위하여 Hanks' Balanced Salt Solution(HBSS)에 침적시켜 시간…