Some Disassembly Required
siRNA-loaded nanoparticles can be taken apart in and cleared by the kidneys, leaving room for optimization of these charged delivery vehicles.
Materials Literature
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Biscyclohexane‐Annulated Diethyl Dipyrrindicarboxylates: Observation of a Dipyrrin Form with Absent Visible Absorption
Abstract A series of 2,3;7,8‐biscyclohexano‐fused diethyl 5‐aryldipyrrin‐1,9‐dicarboxylates have been synthesized [aryl = phenyl, 3,4‐dimethoxyphenyl and 2,3,5,6,8,9,11,12‐octahydro‐1,4,7,10,13‐benzopentaoxacyclopentadecine‐15‐yl (m‐benzo‐15‐crown‐5)]. The obtained compounds were shown to exist in two equilibrium form…
Kinetics of Model Reactions for Interfacial Polymerization
To model the rates of interfacial polycondensations, the rates of reaction of benzoyl chloride and methyl chloroformate with various aliphatic monoamines in acetonitrile were determined at 25 °C. Buffering with picric acid slowed these extremely fast reactions so the rate constants could be determined from the rate of…
Prediction of iron losses in doubly salient permanent magnet machine with rectangular current waveform
Iron losses in doubly salient permanent magnet (DSPM) machine are difficult to predict, as the flux waveforms are complex and dc bias existed. This paper measures iron losses at no load for different rotor speeds and these measured loss data are used to calibrate the iron loss model of the DSPM machine. Then the iron…
Estimation of Empirical Fatigue Crack Propagation Model of AZ31 Magnesium Alloys under Different Maximum Loads
본 논문의 목적은 AZ31 마그네슘합금의 균열성장거동의 경향을 묘사할 수 있는 실험적 피로균열전파모델을 평가하여 적합한 모델을 제시하는 것이다. 3가지 최대하중 조건을 변화시키면서 피로균열전파실험을 수행하여 평가에 필요한 통계적 균열성장 데이터를 획득하였다. 평가에 사용된 실험적 모델은 Paris-Erdogan 모델, Walker 모델, Forman 모델, 수정된 Forman 모델이며, 각 모델의 파라미터를 통계적으로 추정하기 위하여 최우추정법을 사용하였다. 마그네슘합금의 균열성장거동의 경향을 잘 묘사하는 모델은 Paris-Erdogan 모델과 Walker 모델이며…
Purification and characterization of a thermostable glutamate dehydrogenase from a thermophilic bacterium isolated from a sterilization drying oven
Glutamate dehydrogenase from axenic bacterial cultures of a new microorganism, called GWE1, isolated from the interior of a sterilization drying oven, was purified by anion-exchange and molecular-exclusion liquid chromatography. The apparent molecular mass of the native enzyme was 250.5 kDa and was shown to be an hexa…
Barrier-Guided Growth of Micro- and Nano-Structured Graphene
A novel approach for the rational synthesis of low-defect density, patterned graphene from the bottom up, called barrier-guided chemical vapor deposition, is introduced. A patterned barrier layer impedes the growth of graphene in selected areas of the copper substrate, guiding the growth of graphene into desired micro…
Carbon Dioxide Reforming of Methane to Syngas: Modeling Using Response Surface Methodology and Artificial Neural Network
Kesan oksigen terhadap mangkin 1% berat Rhodium di dalam Magnesium Oksida (MgO) dikaji untuk proses pembentukan semula metana dengan menggunakan gas karbon dioksida (CORM). Kesan tiga parameter utama: suhu, nisbah reaktan (O2/CH4) dan berat mangkin terhadap penukaran metana, kememilihan gas sintesis dan nisbah H2/CO d…
Poly (amido amine) dendrimer silences the expression of epidermal growth factor receptor and p53 gene in vitro
To understand more about the lower generations of poly(amido amine) dendrimer (PAMAM) as a non-viral vector for antisense (ANS) therapy, a 21-mer epidermal growth factor receptor (EGFR) ANS was delivered by generation five of PAMAM in T47D breast carcinoma cells in culture. The semi-quantitative polymerase chain react…
The Molecular Structure of 1,2:5,6-Di-O-isopropylidene-3-O-toluenesulfonyl-α-D-glucofuranose
The crystal and molecular structure of 1,2:5,6-di-O-isopropylidene-3-O-toluenesulfonyl-α-D-glucofuranose is reported. This compound crystallizes from a petroleum ether/ethyl acetate mixture with the chiral orthorhombic space group P212121 with four molecules in the unit cell. The unit cell parameters are: a = 9.7945(7…
Toughening of PLA stereocomplex by Impact modifiers
광학 이성질체인 PLLA와 PDLA를 전 조성에서 블렌드하여 PLA stereocomplex(SC)를 제조하였고 DSC를 통해 PLLA matrix안의 SC결정 형성 정도를 파악하였다. 결과적으로 PLA SC blend의 PDLA 함량이 SC 결정 생성 정도에 영향을 주며 PLLA/PDLA=50/50의 조성일 때 가장 많은 SC 결정이 생성되었다. 더 나아가 고유의 낮은 충격강도를 보강하기 위하여 PLLA/PDLA=92/8, 85/15 조성에서 충격보강제(Impact modifiers)를 도입하였다. 제조된 PLA SC/Impact modifiers의 열적기계적 성…
Preparation and Electrocatalytic Performance of Thin-shell Ni/Pt Core-shell Nanoparticles
The Ni/Pt core-shell nanoparticles with different shell thicknesses were prepared by composite coating of colloid particles and then characterized by HRTEM, EDS, XPS and XRD. Electrochemical properties for the oxygen electro-reduction reaction and methanol electro-oxidation were measured by potentiodynamic and cyclic…
Atom probe tomography study of GaMnN thin films
Abstract Determining the nanoscale atomic distribution of transition metals is essential for understanding the magnetic behavior of III‐nitride semiconductors. Atom probe tomography is a characterization technique that can provide direct physical detection of the location of atoms and thus is ideal for investigating n…
Analysis of the Inhibition Layer of Galvanized Dual-Phase Steels
The formation of the Fe-Al inhibition layer in hot-dip galvanizing is a confusing issue for a long time. This study presents a characterization result on the inhibition layer formed on C-Mn-Cr and C-Mn-Si dual-phase steels after a short time galvanizing. The samples were annealed at $800^{\circ}C$ for 60 s in $N_{2}$…
Comparison of Straight and Helical Nanotube Production in a Swirled Fluid CVD Reactor
Research into Carbon Nanotubes and their applications is fast becoming an extremely popular topic, and any means to greatly improve the synthesis process has a huge marketability. While investigating the feasibility of continuous production of single-walled carbon nanotubes in a vertical Swirled Fluid Chemical Vapour…
Spin transfer switching characteristics in a [Pd/Co]m/Cu/[Co/Pd]n pseudo spin-valve nanopillar with perpendicular anisotropy
We successfully demonstrate spin transfer switching (STS) characteristics in a [Pd/Co]m/Cu/[Co/Pd]n pseudo spin-valve nanopillar with 100 nm diameter. We observed lower critical current density and high giant magnetoresistance (GMR) ratio in our devices compared to other fully perpendicularly magnetized pseudo spin-va…
Synthesis and Photocatalytic Properties of CNT/Fe-Ni/TiO2 by Fluidized Bed-chemical Vapor Deposition Method
以Fe-Ni/TiO 2 为催化剂, 采用流化床化学气相沉积法(FBCVD)在TiO 2 表面原位生长碳纳米管(CNT), 得到CNT/Fe-Ni/ TiO 2 复合光催化剂. 通过SEM、XRD、UV-Vis等方法表征其结构和性能, 以亚甲基蓝溶液降解为模型考察其光催化性能. 结果表明: Fe-Ni/TiO 2 催化剂在FBCVD过程中, 镍主要起到了CNT生长催化活性位的作用; 在生长CNT后的复合光催化剂中, 比例较低的Fe 3+ 主要作为电子俘获剂, 抑制TiO 2 光生电子空穴的复合; Ni和CNT共同起到将电子迅速地从TiO 2 中导出, 从而降低光生电子-空穴复合几率的作用. 三者的协同作用显著改善了TiO2的光催化…
Investigation of the Catalytic Performance of a Novel Nickel/Kit-6 Nanocatalyst for the Hydrogenation of Vegetable Oil
Highly ordered mesoporous materials are opening the door to new opportunities in catalysis due to their extraordinary intrinsic features. In this study, Nickel was supported on highly ordered mesoporous silica (KIT-6) by the wet impregnation method, and its performance in the hydrogenation of edible vegetable oil was…
Sustainable Engineering and Eco Design
The material consumption in the United States of America now exceeds ten tones per person per year. The average level of global consumption is about eight times smaller than this but is growing twice as fast. The materials and the energy needed to make and shape them are drawn from natural resources: ore bodies, miner…
Halide-controlled Construction and Structural Determination of a Series of Thiolato-bridged 16-Nuclear Copper(I) Clusters from Benzothiazoline
Abstract Treatment of [Cu(CH3CN)4]+ with 2-(4-dimethylaminophenyl)benzothiazoline in the presence of halide ions (X = Cl−, Br−, and I−) gave [Cu16L12X]3+ (L = (C6H4NMe2)CH=N(C6H4)S−) with a spherical Cu16S12 structure, while similar treatment in the absence of halide ions afforded [Cu8L8]2+ with a cyclic Cu8S8 structu…