匿名使用者
匿名使用者 發問時間: 社會與文化語言 · 1 0 年前

請英文達人~幫忙吧!

When the

calculus dimensions were so small that they do not allow

powdering, the bulk sample was merely deposited on the

tape. For quantification, certified standards of apatite, soil

and SO2Zn were used. Special care was taken to avoid

intercontamination among the samples and also standards

during the sample preparation procedure.The X-ray fluorescence analysis was carried out at the

D09B-XRF beamline of the Laboratorio Nacional de Luz

Sı´ncrotron (LNLS, Campinas, Brazil). Storage ring and

beamline characteristics were described in a previous article.

10 The setup conditions for the measurements are shown

in Table II. The features and energies of the incident radiation

make this analytical method insensible to the presence

TABLE I

The Sites and Teeth from Which Dental Calculi Were Extracted

Site M41 D41 M31

D31

MD33

M32

D42

D32

M42

M42

D32

D42

M32

MD43

MD33

D31 M31 D41 M41

Month 1 2 3 4 5 6 7 8 9 10 11 12

A period of 1 month was left between the collection of each sample. M, mesial side; D, distal side.

TABLE II

Characteristics of the Radiation Beam, Sample, and Experimental Setup

Beam Spectrum

Critical

Energy

Photon

Fluxa

Irradiation

Area Filters Geometry Detector

White 0.57 keV 3.0921012 5 mm2 Al 0.5 mm 45–45° Si(Li)

Atmosphere

Measuring

Time (LT) Samples Sample Area Sample Holder

Sample

Weights Standards

Air

200 sec per

sample 19 4 mm2 Scoth tape

15–65

mg/cm2

Apatite, soil,

SO2Zn

aBeam flux in [photons/mrad s(0.1%E/E)] units.

624 ABRAHAM ET AL.

of organic materials and do not induce changes in crystal

structures.

The whole process of beam alignment, shaping, and positioning

is made by remote-controlled stepper motors and

monitored with local videocameras. In this way, the entire

sample area was irradiated during the measurements, keeping

the excitation of the cellophane tape as small as possible

to reduce scattering contributions.

2 個解答

評分
  • 1 0 年前
    最佳解答

    什麼時候

    微積分尺寸如此小以致於他們不允許

    給撲粉,那些體積取樣僅僅在上沈積

    帶子。 對確定數量來說,證明磷灰石,土壤的標準

    並且SO2Zn被使用。 特別的小心被帶避免

    在樣品以及標準中的intercontamination

    在那些樣品準備procedure.The X射線期間瑩光分析被進行對

    Laboratorio Nacional de Luz的D09B-XRF beamline

    Si crotron(LNLS,Campinas,巴西) . 存儲環和

    beamline 特性被在一篇以前的文章裡描述。

    尺寸的10種安裝條件被顯示

    在表格II。 事件輻射的特徵和能量

    使這種分析的方法對存在不省人事

    列入議程我

    牙齒的Calculi被選出的場所和牙齒

    M41 D41 M31 場所

    D31

    MD33

    M32

    D42

    D32

    M42

    M42

    D32

    D42

    M32

    MD43

    MD33

    D31 M31 D41 M41

    月 1 2 3 4 5 6 7 8 9 10 11 12

    1個月的時間被在每個樣品的收集之間留下。 M,中間的邊; D,遠端的邊。

    列入議程II

    輻射梁,樣品和實驗安裝的特性

    梁範圍

    關鍵

    能量

    光子

    Fluxa

    照射

    領域過濾器幾何學檢測器

    白色的0.57 keV 3.0921012 5 mm2艾爾0.5毫米45 5 &-#176;Si(李)

    空氣

    測量

    時間(LT) 樣品樣品地區樣品持有者

    樣品

    重物標準

    空氣

    200秒每

    取19 4條mm2 Scoth 帶子樣

    15 5

    毫克/厘米2

    磷灰石,土壤,

    SO2Zn

    aBeam 流在裡 [photons/mrad s(0.1%的E/E) ]單位。

    624亞伯拉罕東部時間AL。

    有機材料和沒引起水晶般變化

    架構。

    梁調整的整個過程,形成,並且確定的位置

    被遙遠控制的步進電機做和

    用本地攝像機監控。 以這種方法,整個

    樣品地區被在尺寸期間照射,保持

    儘可能小的玻璃紙帶子的激勵

    降低散佈貢獻。

    2006-04-02 02:45:42 補充:

    賣女孩的火柴:爛!!是很爛..僅供參考..你那麼行.你來翻吧..要嘛你來翻更好的!!不然不要批評.謝謝你的指教

    • 登入以對解答發表意見
  • 這是直接用網頁翻過來的吧~爛死了

    • 登入以對解答發表意見
還有問題?馬上發問,尋求解答。