Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
1870 年代から 1880 年代にかけて結成された製糸結社は、構成員に売上金を分配するために生糸を等級別に分類したから、一つの荷口に様々な品質の生糸が混入することによって生じる逆選択を解消する役割を果たした。しかし、日本の生糸生産者は一時期の碓氷社を除いて原商標を括の上に付けていたので、流通業者による原商標の剥奪と格付の偽装など様々な不正行為を許すことになった。1910 年代末から日米間で激化した格付問題の本質は、日本産生糸では注文した格付通りの生糸が届けられたのかを原商標によって確認することができないという点にあった。1920 年代にアメリカの生糸最終消費者（＝絹製品製造業者）が原票、即ち原商標による生糸取引を要求したのは、商…
[[abstract]]本實驗將3D聚酯纖維進行無電極鍍鎳，探討其織物3D結構對於電磁波之吸收效益，並加以改變其外在條件，改變其無電極鍍鎳的時間，本實驗依參考文獻提供的無電極鍍鎳方法將pH值固定4～6，溫度固定為90℃時電鍍時間設定為5 分鐘、10分鐘、15分鐘、20分鐘、25分鐘，依序增加其時間，觀察其電鍍時問改變對於電磁波吸收效益之影響，希望找到其3D聚酯織物最佳的吸收溫度條件，進而能使吸收電磁波的效果提升，本實驗電鍍時間為15分鐘時，電磁波吸收值最高可達27dB，經由阻抗匹配電磁波吸收值最高可達33.1dB。 ln this study, 3D-free polyester fiber nickel electrodes t…
[[abstract]]本研究係利用椰子纖維與聚乙烯醇水溶液且添加不同比例之壓克力樹脂，經充分均勻混合後微波發泡製作出各式纖維集合體當作無土栽培之樣本。探討不同壓克力樹脂添加之比例，對其發泡效果與發泡的成型性和物性的影響。實驗結果顯示，椰纖與聚乙烯醇水溶液和壓克力樹脂比例為2：3：0.15時具有最佳成型性；且添加壓克力樹脂後之pH值為5.7，EC值為1.7ms／cm，皆符合一般植物栽培的環境條件。 In this study, we use the coconut fibers and polyvinyl alcohol (PVA) with adding different proportion of acrylic resin…
[[abstract]]本實驗之目的在於探討輸送帶基布PET／Nylon織物經遠紅外線預熱處加工時，改變遠紅外線加熱器與基布問距離影響之研究。實驗中分別對加熱器與基布距離為5公分、6公分、7公分三個距離處理後，對於基布的拉昇強力、外觀、藥劑吸收量與藥劑處理後之剝離強力進行觀察。輸送帶在業界強力要求，布與布、布與膠剝離強力分別需達到12kgf和14kgf，由實驗得知，經二段式遠紅外線預熱處理，間距為5公分的條件下，布與布剝離強力為17.90 kgf，較原布提升38.2%，布與膠剝離強力為18.13kgf，較原布提升30.4%。 This research is PET/Nylon fabric pre-treatment by fa…
NRC publication: Yes
Atactic polypropylene is generated as a byproduct during the industrial production of polypropylene. Atactic polypropylene has limited applications in the industry. However, if atactic polypropylene is modified chemically, it can be used in various industrial applications.
Bu çal›flmada termoplastik elastomerlerin haz›rlanmas›nda at›k lastikve plastiklerin kullan›m› incelenmifltir. Ö¤ütülmüfl lastik tozu, at›kEPDM kauçu¤u, at›k nitril kauçuk, lateks at›¤› ve at›k plastiklerdenelde edilen termoplastik elastomerler(TPE’ler) bileflimlerine ve fizikselözelliklerine göre ayr› ele al›nm›flt›r…
The synthesis, crystal structure, and dielectric properties of the novel double perovskite Pb2TmSbO6 are described. The room-temperature crystal structure was determined by ab initio procedures from neutron powder diffraction (NPD) and synchrotron X-ray powder diffraction (SXRPD) data in the monoclinic C2/c (No. 15) s…
A presente tese tem como objetivo principal a investigação do processo de intercalação e esfoliação do hexaniobato lamelar em soluções de hidróxidos de tetraalquilamônios e, também, do emprego das partículas do niobato na preparação de materiais híbridos com polissacarídeos. O material de composição H2K2Nb6O17 foi sus…
As ligas de ferro fundido branco multicomponente são aços rápidos resistentes ao desgaste em temperaturas elevadas. Estes aços apresentam carbonetos eutéticos do tipo MC e M2C quando no estado bruto de fundição. Neste trabalho foi caracterizada a microestrutura dos produtos de decomposição após tratamentos térmicos do…
Neste trabalho é apresentado um estudo espectroscópico sobre vidros de germanato contendo nanopartículas (NPs) metálicas e semicondutoras dopados com íons de terras-raras (TRs) Eu3+, Nd3+ e Er3+ visando o desenvolvimento de novos materiais para aplicações em fotônica. Estes vidros apresentam larga janela de transmissã…
A corrosão do aço de reforço e de grande preocupação na construção civil, pois e a causa mais comum da degradação no concreto armado. Inicialmente o aço embutido e naturalmente protegido da corrosão pela alta alcalinidade da estrutura de concreto. No entanto, esse estado passive pode ser rompido pela destruição da pel…
Subclass B1 β-lactamases are Zn(II)-dependent hydrolases that confer bacterial resistance to most clinically useful β-lactam antibiotics. The enzyme BcII from Bacillus cereus is a prototypical enzyme that belongs to this group, the first Zn(II)-dependent β-lactamase to be discovered. Crucial aspects of the BcII cataly…
0.0001)among the four groups and Duncan's multiple range test showed that microwave cured + fibers significantly higher transverse strength followed by heat cured +fibers, microwave alone, while heat alone shows significantly lowest transverse strength. Residual monomer test: Analysis of variance(ANOVA) for the four g…
Lattice-matched KY(WO4)2:Gd3+,Lu3+,Tm3+ layers with a thickness of 6 μm have been grown onto pure KY(WO4)2 substrates. Channel waveguides of 7.5 μm to 12.5 μm width have been microstructured to a depth of 1.5 μm using Ar+ beam milling. Laser experiments with buttcoupled mirrors demonstrate laser oscillation near 1844…
In KY(WO4)2:Gd3+,Lu3+,Yb3+ channel waveguides, we produced 418 mW of output power at 1023 nm with 71% slope efficiency versus launched pump power. Grating tuning in an extended cavity provided laser operation from 981 nm to 1045 nm. When pumping at 973 nm, lasing at 981 nm with a record-low quantum defect of 0.8% was…
Bruce Montgomery examines how both silk weavers and designers are making the tie an increasingly relevant contemporary style choice, with the traditional British necktie continuing to gain favor both in the UK and in global markets such as Japan, Korea and the US. Central to the whole process is the silk, viewed as a…
Disordered networks are found in many natural and artificial materials, from gels or cytoskeletal structures to metallic foams or bones. Here, the energy distribution in this type of networks is modeled, taking into account the orientation of the struts. A correlation between the orientation and the energy per unit vo…
This PhD dissertation is framed in the emergent fields of Reverse Logistics and ClosedLoop Supply Chain (CLSC) management. This subarea of supply chain management has gained researchers and practitioners' attention over the last 15 years to become a fully recognized subdiscipline of the Operations Management field. Mo…
The design and prototyping of radiating elements with tunable phase response, for reconfigurable patch array antennas, is presented. Different options are found in the technical literature to obtain feasible reconfigurable array antennas: placing the active circuitry in the transmission lines or directly over the radi…