 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 9 | 1/1 | 返回列表 |
| 查看: 3312 | 回復(fù): 8 | ||
[求助]
cpm是神馬單位？ 已有3人參與
|
| The confluent cells were incubated in serum-free medium for 30 min followed by the addition of 50,000-100,000 cpmcpm of 125I-labeled human growth hormone (hGH） |
回復(fù)此樓» 猜你喜歡
考研調(diào)劑
已經(jīng)有3人回復(fù)
-
317分 一志愿南理工材料工程 本科湖工大 求調(diào)劑
已經(jīng)有9人回復(fù)
-
297求調(diào)劑
已經(jīng)有10人回復(fù)
-
一志愿武漢理工，總分321，英一數(shù)二，求老師收留。
已經(jīng)有10人回復(fù)
-
343求調(diào)劑
已經(jīng)有5人回復(fù)
-
085601材料工程找調(diào)劑
已經(jīng)有7人回復(fù)
-
求調(diào)劑，一志愿 南京航空航天大學(xué) ，080500材料科學(xué)與工程學(xué)碩，總分289分
已經(jīng)有6人回復(fù)
-
一志愿南航 335分 | 0856 | GPA 4.07 | 有科研經(jīng)歷
已經(jīng)有5人回復(fù)
-
340求調(diào)劑
已經(jīng)有5人回復(fù)
-
一志愿北化求調(diào)劑
已經(jīng)有4人回復(fù)
» 本主題相關(guān)價(jià)值貼推薦，對(duì)您同樣有幫助:
- 這是個(gè)神馬東東？？？：l.dean@lap-publishing-house.com
已經(jīng)有3人回復(fù)
2樓2014-02-27 17:55:01
3樓2014-02-27 18:29:18
wizardfan
至尊木蟲 (著名寫手)
- BioEPI: 18
- 應(yīng)助: 599 (博士)
- 貴賓: 1.818
- 金幣: 24632.2
- 散金: 197
- 紅花: 48
- 沙發(fā): 2
- 帖子: 2254
- 在線: 400.7小時(shí)
- 蟲號(hào): 1879241
- 注冊(cè): 2012-07-05
- 性別: GG
- 專業(yè): 生物信息學(xué)
【答案】應(yīng)助回帖
感謝參與，應(yīng)助指數(shù) +1
|
和放射有關(guān)的就是counts per minute The measurement of ionizing radiation is sometimes expressed as being a rate of counts per unit time registered by a radiation monitoring instrument, of which counts per minute and counts per second are commonly used. This measurement is only of the rate of events registered by the measuring instrument, not the rate of events at the point of original emission. For radioactive decay measurements it must not be confused with disintegrations per unit time (dpm), which represents the rate of atomic disintegration events at the source of the radiation. Count rates are normally associated with the measurements of particles, such as alpha particles and beta particles. For gamma ray and X-ray dose measurements a unit such as the Sievert is normally used |
4樓2014-02-28 06:23:45
yipan 
銅蟲 (職業(yè)作家)
- BioEPI: 2
- 應(yīng)助: 214 (大學(xué)生)
- 金幣: 16396.4
- 散金: 275
- 紅花: 6
- 帖子: 4182
- 在線: 195.9小時(shí)
- 蟲號(hào): 2743878
- 注冊(cè): 2013-10-22
- 性別: GG
- 專業(yè): 整合生物學(xué)
5樓2014-02-28 10:13:58
091101008
金蟲 (正式寫手)
- 應(yīng)助: 2 (幼兒園)
- 金幣: 1046.2
- 帖子: 579
- 在線: 45.3小時(shí)
- 蟲號(hào): 2917254
- 注冊(cè): 2014-01-06
- 專業(yè): 基礎(chǔ)物理學(xué)
6樓2014-03-18 21:20:14
091101008
金蟲 (正式寫手)
- 應(yīng)助: 2 (幼兒園)
- 金幣: 1046.2
- 帖子: 579
- 在線: 45.3小時(shí)
- 蟲號(hào): 2917254
- 注冊(cè): 2014-01-06
- 專業(yè): 基礎(chǔ)物理學(xué)
7樓2014-03-18 21:22:09
fightcricket
金蟲 (正式寫手)
- 應(yīng)助: 4 (幼兒園)
- 金幣: 694.3
- 散金: 30
- 紅花: 1
- 帖子: 414
- 在線: 263.3小時(shí)
- 蟲號(hào): 972848
- 注冊(cè): 2010-03-16
- 專業(yè): 細(xì)胞信號(hào)轉(zhuǎn)導(dǎo)
8樓2014-03-20 07:13:42
fightcricket
金蟲 (正式寫手)
- 應(yīng)助: 4 (幼兒園)
- 金幣: 694.3
- 散金: 30
- 紅花: 1
- 帖子: 414
- 在線: 263.3小時(shí)
- 蟲號(hào): 972848
- 注冊(cè): 2010-03-16
- 專業(yè): 細(xì)胞信號(hào)轉(zhuǎn)導(dǎo)
|
雖然關(guān)了貼，但我想補(bǔ)一段。 Disintegrations per minute (dpm) and disintegrations per second are measures of the intensity of the source of radioactivity. The SI unit of radioactivity, the becquerel, is equivalent to one disintegration per second. It is included in this article to show that it should not be confused with cpm. Becquerels is the strength of the source of radiation, but cpm is the number of counts received by an instrument from that source. The efficiency of the radiation detector (e.g. scintillation counter) and its relative position to the source of radiation must be accounted for when relating cpm to dpm. Dpm is the number of atoms that have decayed, not the number of atoms that have been measured as decayed. SI Units for radioactive disintegration[edit] One becquerel (Bq) is equal to one disintegration per second; 1 becquerel (Bq) is equal to 60 dpm. One curie (Ci) is equal to 3.7×1010 Bq or dps, which is equal to 2.22×1012 dpm. 這才完整。 |
9樓2014-03-20 07:30:19
相關(guān)版塊跳轉(zhuǎn)
我要訂閱樓主 小雷想 的主題更新
| 9 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 348求調(diào)劑 +5 | 小懶蟲不懶了 2026-03-28 | 5/250 |
|
|---|---|---|---|---|
|
|
[考研] 329求調(diào)劑 +8 | 鈕恩雪 2026-03-25 | 8/400 |
|
|
[考研] 0856材料化工調(diào)劑 總分330 +14 | zhubinhao 2026-03-27 | 14/700 |
|
|
|
[考研] 各位老師好，我的一志愿為北京科技大學(xué)085601材料專碩 +8 | Koxui 2026-03-28 | 8/400 |
|
|
|
[考研] 305求調(diào)劑 +8 | RuiFairyrui 2026-03-28 | 8/400 |
|
|
|
[碩博家園] 招收生物學(xué)/細(xì)胞生物學(xué)調(diào)劑 +4 | IceGuo 2026-03-26 | 5/250 |
|
|
|
[考研] 一志愿211 初試270分 求調(diào)劑 +8 | 谷雨上岸 2026-03-23 | 9/450 |
|
|
|
[考研] 343求調(diào)劑 +5 | 愛(ài)羈絆 2026-03-28 | 5/250 |
|
|
|
[考研] 求化學(xué)調(diào)劑 +4 | wulanna 2026-03-28 | 4/200 |
|
|
|
[考研] 0703化學(xué)求調(diào)劑 +9 | 奶油草莓. 2026-03-22 | 10/500 |
|
|
|
[考研] 277跪求調(diào)劑 +5 | 1915668 2026-03-27 | 9/450 |
|
|
|
[考研] 0703化學(xué)/290求調(diào)劑/本科經(jīng)歷豐富/工科也可 +9 | 丹青奶蓋 2026-03-26 | 10/500 |
|
|
|
[考研] 一志愿南師大0703化學(xué) 275求調(diào)劑 +4 | Ripcord上岸 2026-03-27 | 4/200 |
|
|
|
[考研] 材料292調(diào)劑 +12 | 橘頌思美人 2026-03-23 | 12/600 |
|
|
|
[考研] 298調(diào)劑 +3 | jiyingjie123 2026-03-27 | 3/150 |
|
|
|
[考研] 0703化學(xué)338求調(diào)劑！ +6 | Zuhui0306 2026-03-26 | 7/350 |
|
|
|
[考研] 材料與化工304求B區(qū)調(diào)劑 +3 | 邱gl 2026-03-25 | 3/150 |
|
|
|
[考研] 302求調(diào)劑 +4 | 錦衣衛(wèi)藤椒 2026-03-25 | 4/200 |
|
|
|
[考研] 求調(diào)劑 +3 | 李李不服輸 2026-03-25 | 3/150 |
|
|
|
[考研] 一志愿吉林大學(xué)材料與化工303分求調(diào)劑 +4 | 為學(xué)666 2026-03-24 | 4/200 |
|