a*********a 发帖数: 3656 | 1 I m on long island, Cable Vision used to be the only one, but several years
ago, Verizon started to cover a lot of the area. However, the cost of laying
fibers is so high that they stopped the expansion. There are still pockets
of towns that r still under Cable Vision monopoly, with Direct TV as the
other option.
The way I see it. Either the ISPs charge user by amount of data transmitted,
or the ISPs charge the content providers by the data transmitted. Who use
who pay, no other way.
Otherwise, ... 阅读全帖 |
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l******d 发帖数: 1633 | 2 大小取决于kbps,跟格式关系不大
这些专有的格式尽量不要碰
swf |
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r****y 发帖数: 26819 | 3 vegas没法识别,vegas只能识别24-192kbps的audio。
有其他video编辑软件可以识别吗? |
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a*o 发帖数: 19981 | 4 I believe vlc does not care what bitrate you are. give it a try. |
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r****y 发帖数: 26819 | 5 vlc是media player吧
能做video editing?
我不是不能播放,是想编辑 |
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l******d 发帖数: 1633 | 10 我的意思就是用别的工具把video和audio分开,然后把audio降码率 |
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m**i 发帖数: 724 | 12 我刚用windows media encoder 9 把一个 vob file 转成了wmv.
我觉得这东西很有前途。这有两层意思。
第一,在我目前的机器上(piii 667, 512m, nvidia32) 运行效果不好,会跳帧。
第二,如果你又一个非常"powerful" (dual cpu or a P4 with a good video card) 的
机器,其效果会很好。加上几乎是 one click 的操作。可以想见以后备份dvd 将不太难
。
优点:
1. 操作简单,一步到位。(转 camcorder 的文件应该很合适。我是过 win encoder 7.)
2. 图像效果不错。
3. 我转的5分钟dvd 没有 out of sync 的问题。
4. 压缩比合适。(dvd 720*480 to 360*240 500 kbps, 约1:6)
5. 界面好。有 support. free! (up to now。)
问题:
1. 不能用 window media codecs 和 iso mpeg 4 之外的 codec.
2. 编辑工具还不多。
3. 需要 very p |
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a***e 发帖数: 1010 | 13 go to wormbase.org
search tag-24
go to "location", click the picture, "Showing 2.515 kbp from X, positions 5,
608,905 to 5,611,419"
in "landmark or region", change "X:5608905..5611419" to "X:5608905..5613419"
In "reports & analysis", change to "download sequence files", click "go"
it will give you the 2k promoter plus the whole gene sequence. |
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s*********t 发帖数: 600 | 14 我转200 kbp的bac, 用lipofectamine ltx plus, work得很好。 |
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l**********1 发帖数: 5204 | 15 你简直是在提取genomic DNA 吧 啊?
50 kbp length 以上的Gel picture 白的亮眼球的 都是 Genomic DNA
氯仿or 意丙醇抽提的话 接近界面的 界面附近液层的 移液枪的chip 尖端 不得在碰到那个位置的时侯
有丝毫的吸液的大拇指的松动的动作
酒精沉淀 以及清洗的分离液体作业的时候 同样
好的RNA Extraction PP 如下:
[回复]
[ 5 ]
发信人: contain (containor), 信区: Biology
标 题: Re: 还是RT_PCR
发信站: BBS 未名空间站 (Thu May 24 22:06:11 2012, 美东)
RT之前为什么一定要用dnase处理?我现在的问题不是有DNA污染,而是RT-PCR之后什么
产物都没看到。 |
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l**********1 发帖数: 5204 | 16 LZ pls try
XL-TOPO@ zero blunt kit
3kbp < insert size < 10 kbp
//www.invitrogen.com/1/1/17320-topo-xl-pcr-cloning-kit.html
and
//www.invitrogen.com/site/us/en/home/Products-and-Services/Applications/
Cloning/PCR-cloning.html
original hint was from
http://www.mitbbs.com/article_t/Biology/31695611.html
3th floor |
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l**********1 发帖数: 5204 | 17 how about COL4A1 ?
PMID 22253229
Assadian S et al.
p53 inhibits angiogenesis by inducing the production of Arresten. (2012).
Cancer Res. 72: 1270-9.
cited
p53 directly activated transcription of the COL4A1 gene by binding to an
enhancer region 26 kbp downstream of its 3' end
PubMed link:
http://www.ncbi.nlm.nih.gov/pubmed/22253229 |
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l**********1 发帖数: 5204 | 18 Agilent @AffinityScript Multiplec trmprature Reverse Transcriptase could be
up to 20 kbp
Pls chrck below pdf file, its Top one line,
HTTP double dot//www.laborjournal.de/rubric/produkte/products_09/LJPr-09-07.
pdf |
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B***v 发帖数: 113 | 19 关于minicircle DNA的“backbone”我打电话问这个公司了,https://www.systembio.
com/,他们说1.2 kbp的backbone,不是parental,我觉得是可以更小的,但他们就这
么说的,我的insert 1.7的话,整个就2.9
你说的这个1,2,3都是对的。
我之所以想自己搞是因为如果我直接把insert连起来连这个1.2 kb都没有,更小,最精
简的表达单元。而且
minicircle DNA的制备很tricky,条件稍微不合适效率很低。我没有一手经验,这个公
司的人如是说。 |
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f*********t 发帖数: 37 | 20 8KHZ sampling rate in digital modem is the sampling rate for voice. Those
8kHz samples will be encoded to 64Kbps data stream. 64kbps data stream will
be compressed, channel encoded and modulated before transmision. The 64kbps
audio signal can be then transmitted in rate 4.7kbps to 12kbps. The higher
rate the better quality of the voice.
传统的MODEM I think you mean the old modem that supports 4.8k -9.6 kbps. I
think they use 16QAM modulation and symbol rate is 1.2khz-2.4khz. This
signal will be mod |
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