2,906 research outputs found

    Local structural characterization of gold nanowires using extended X-ray absorption fine structure spectroscopy

    No full text
    Gold nanowires were prepared via seed-mediated growth process. Standard X-ray powder diffraction pattern of nanowires & foil are nearly identical. The intensities of the (220) & (111) diffraction peaks was higher than the conventional value, which implied that the nanowires were abundant in {110} facets. This is in accordance with electron diffraction analysis of mature nanowires, the wires grow along the [110] directions. X-ray absorption spectroscopy indicates that coordination number of gold nanowires was slightly smaller than that gold foil. Moreover, the Debye–Waller factor of the refinement result of gold nanowires implies that there were some structural defects

    (6(3):47-52)AN EXPERIMENT ON THE DEMONSTRATION OF FERTILIZATION FOR WHEAT

    No full text
    本示範自民國四十三年十月間開始至民國四十四年三月完成。為欲使農民明瞭三要素肥料配合施用的重要性,在臺中地區選定十處舉行本示範。每處同設有四處理,即氮肥區、氮燐肥區、氮鉀肥區、完全區等四種。肥料施用量參照臺中地區過去舉辦之三要素施肥標準量試驗成績而定。惟恐燐肥過少故將其提高,實際三要素施用量為、氣、燐、鉀100:80:60(公斤/公頃)。示範結果除一兩處差異較少外,餘均甚顯著。以氮肥區產量為100時,氮鉀、氮燐、完全區之指數為麥實107,108,132麥稈為124,106,142之順序。計每公斤氯化鉀可增產鮮態麥實6.8~9.5公斤,過燐酸鈣可增產0.8~1.6公斤。 再本示範對農民印象檢討如下: (1) 播種後各處理間之差異均日見顯明,因此引起農民興趣,藉可使其澈底瞭解三要素肥料的重要性。 (2) 使用鉀肥的增產量均極顯著。農民未明鉀肥功效者,由此當可獲得深切瞭解。 (3) 肥料配合適當與否,非但可影響產量增減,即其成熟收穫期之遲早亦大受影響。僅使用硫酸錏區的成熟期顯明的較其他各區為遲。 (4) 燐肥對小麥之初期發育如發芽、分蘗及促進成熟等之肥效,均引起了農民的注意。 From October 1954 to March 1955, a demonstration on the application of NPK fertilizers on wheat has been carried out in order to show the importance of using phosphorus and potassium fertilizers in combination with nitrogen, a fact which is not well recognized by local farmers. Ten demonstration fields were selected in the Taichung, Fongyen, and Wufong districts. Four treatments, namely, N, NP, NK, NPK, were laid in each demonstration and the amounts of N, P2O5, & K2O fertilizers applied were respectively 100:80:60 kg/ha. The average increase of yields can be computed into the following indexes: for grain, N 100, NK 117, NP 108, NPK 132. for straw, N 100, NK 124, NP 106, NPK 142. Each kilo of potassium chloride can produce 6.8 to 9.5 kilos of grain and each kilo of superphosphate can give 0.8 to 1.6 kilo of grain. This demonstration evidenced the following facts to farmers: 1. The differences among 4 different treatments were quite significant in most localities. Farmers were deeply impressed and had a clear understanding of the purpose of the demonstration. 2. The increase of grain and straw yields due to the application of potash were most significant in every locality. The farmers have gained a better knowledge of the effects of potash. 3. Whether the three elements are used in a correct proportion or not, it may affect not only the yield of wheat but also the time of maturity. In this demonstration, the N plots were still immature while NPK plots were ready for reaping. 4. The phosphatic fertilizer can improve the development of plant in the first stage of growth and can hasten the maturity. Farmers were much interested and paid great attention to this effect

    The Construction and Political Function of Han Ch'ang-An

    No full text
    本文依據文獻記載與考古資料,討論西漢各代長安城的營建和規劃,進而研究都城的社會結構及建築物所代表的政治意義。This article is written according to historical documents and archiological findings. My purpose is to discuss the construction and planning of Ch'ang-An during Former Han period, and to study the political significance behind the city's social and architectural structure

    Photograph of a bust of the author Tasma

    No full text
    Photograph of a bust of the author Tasma (Jessie Catherine Couvreur). Pencilled on verso of photo 'Tasma - enlargement of an original lent to H.M. Green? by Mrs Erdos, a neice of Tasma
    corecore