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全部话题 - 话题: bead
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a***y
发帖数: 19743
1
来自主题: Biology版 - 实例:利用NGS检测治病菌
好像是ab上连得有nano beads,这些beads会给出一个NMR的信号
我觉得这个很牛。ngs测细菌相比起来就太原始了。
现在不是搞生物的来搞这个很厉害。上次在北京地铁里遇到一个墨西哥某大学的去参加
会议,他说他做的就是用nano material来检测食物里病原体,原理基本类似,就是
nano material bind到病原体上,就可以测到特殊的spectrum
g********6
发帖数: 86
2
来自主题: Biology版 - 求问RNA immunoprecipiation(RIP)问题
可以deplete rRNA后做NGS。不知道你用什么beads做IP,magnetic beads有很高的
background binding。

TapeStation
28S
y*****u
发帖数: 31
3
现在用人类痰液提取巨噬细胞,一开始是照着PROTOCOL提到混合细胞(上皮,巨噬细胞
等)。这个细胞团即使经过PBS多次清洗也是很松散的,感觉不是那种纯细胞团PALLET
样。我用这个细胞团进行BEADS ISOLATION,这一步基本要花4个小时以上,杂质经常堵
塞BEADS管。混合细胞里面杂质太多,多糖啥的,请问有啥好的方法清洗这个细胞(去
除多糖杂质)?
之前发表了几篇文章后,几乎每周都有一些不知名的杂质来EMAIL约稿。我自己想审稿
,给绿卡攒,这些杂质靠谱吗?
f******k
发帖数: 856
4
来自主题: Biology版 - 请教ChIP-seq用Dynabeads的问题
我这个问题很奇特,我用Invitrogen的dynabeads做ChIP-seq,最后拉下来的DNA量总是
比较高,做qPCR也没有enrichment,但是用同样的protocol,换回agarose beads,就
很少碰到这种问题。这不合理啊,dynabeads按理说背景要比agarose beads低很多才对
啊?!不知道大家有没有碰到这种情况?我试过好几种洗的方法和试剂,比如最常用的
就是低盐洗一次,高盐洗一次,LiCl洗一次,TE洗两次。也试过用RIPA洗过,也试过大
量延长洗的时间,但是最后elute下来DNA的量还是比较高。
另外,能不能请推荐一个比较好的做转录因子ChIP-seq的盒子或者详细的homemade
protocol?我做的这个转录因子,比较low abundant,可是我的材料是primary tissue
,又没法一次拿到很多的细胞(一次运气好的话可以有50-100million)。看有的文章
说现在10million就可以做转录因子的ChIP-seq了,可是我从来没成功过。现在真是快
被逼死啦。。。。快救救我 :(
k*****n
发帖数: 323
5
来自主题: Biology版 - 请教ChIP-seq用Dynabeads的问题
In general, magnetic beads works better than agroase beads for ChIP, I have
not encounter your situation before. Don't put sperm DNA, Check you DNA size
, get the concentration through qubit rather than nanodrop
n******e
发帖数: 89
6
来自主题: Biology版 - 我被怀疑造假的经历
我自己的经历,被怀疑造假也没什么,不需要什么第三方权威人士验证,把怀疑最厉害
的人说服了就可以的。
前几年离开原来实验室做公司去了,留下一篇基本写好的manuscript,老板让接手的烙
印博后小兄弟做个co first author补点数据准备投个大文章。没想到接手的小兄弟不
好好补数据却去检验我做好的部分,过了些日子老板抱怨我的数据不可重复,因为跟老
板本来关系特别好像朋友一样,如果造假就像坑朋友的饭碗当然是特别严重的。所以特
别安排了一个礼拜的时间回到原来的城市,看看小兄弟究竟有什么实验操作问题,全程
烙印动手我就看看加动嘴皮子。
其中一个实验是endogenous co-IP,烙印说是对照的抗体也有pull-down和阳性的差不
多,而我的数据里面对照是干净的。抗体beads结合完了以后需要清洗,我看烙印把离
心机设定到8000rpm3min,当场叫停,这么高的速度做什么,我都是1500rpm20sec,抗
体beads这么大太容易离心了。因为这是常识,感觉都算不上技巧,方法里面有一些没
有写到那么详细的程度。endogenous co-IP因为蛋白表达量低而细胞裂解液浓度较高... 阅读全帖
n******e
发帖数: 89
7
来自主题: Biology版 - 我被怀疑造假的经历
如果预先知道会有人不会洗beads,肯定把这个写上了。我自己原来也没有人仔细教过
,根据常识来说细胞只要1500rpm可以离心下来,这个beads放在那里几秒钟自己都能沉
降了可以看得很清楚,估计200rpm就足够了,我用1500rpm应该已经算是overkill,这
个范围可以很大应该不算关键参数。只是哪里能想到别人用8000这么搞。实验记录本已
经尽量详细了,要是不详细的话光改这么一个条件应该还是做不出来。每天工作量很大
,写记录只能把握一个尽可能的度。前面的Dua没有检查到自己头上不要轻易下结论,
很可能你自己的记录本也缺了点啥东西谁知道呢。
写这个没有支持韩春雨的意思,虽然希望韩是真的,假如韩的结果证实不行了希望不要
影响小实验室模式。
n********k
发帖数: 2818
8
来自主题: Biology版 - 我被怀疑造假的经历
如果我没有记错,有些BEADS说明书上是说不要过度VORTEX和过高速度离心,因为会损
伤BEADS,这个也学对于新生不算尝试,但是但凡有心的实验者应该都不是问题。所以
实验有时也还真有点艺术,对于有的人复杂的东西也比较简单,但对于有的人,很简单
的人也很复杂...习惯细节决定成败...
b********g
发帖数: 46
9
来自主题: Biology版 - 投文章,真诚求建议
你该是chromatin领域内的行家了。
尽管不甘心,但是已经开始放下心态了。请教问题:
1)当年olins夫妇如何在in vivo 证明这个bead-on-a-string structure的?我的印象
是没有谁用fluorescent microscopy做了(resolution也打不到啊)。最近的in vivo
super-resolution也只是证明了nucleosomal clutch(发在cell上,大家自己找),没
有证明bead-on-a-string啊?哦,对了,biochemistry method, MNase digestion, 再
提取DNA, gel。OK。但是这个MNase digestion的chromatin不也是提取的吗?
避而不谈这个问题了。我实在想不出有什么其他biochemical method 去印证我观测到
的结构了。
2) 如果你来做这个研究,用什么东西来提取chromatin比较好呢?前提,无损higher
order chromatin structure.
R****n
发帖数: 708
10
来自主题: Biology版 - 求个histone ChIP检测DNA protocol
最近有个项目要检测H3 modification和DNA modification的关系,做一些前期的试验
。准备pulldown histone, reversecrolink, 收集DNA做Dot blot.
直到SONICATION这一步都行,Chromatin reverse crosslink后 DNA在agar gel H3 在
page gel上都有信号。 但是pulldown后没有信号。主要基于 Farnham protocol。
他的ChIP buffer就是RIPA,beads也没有block,这个没问题么?有些别的protocol用
salmon DNA block beads,salmon DNA的methylation会影响 DNA methylation dot
blot结果吧?
k****o
发帖数: 728
11
来自主题: Chemistry版 - 请教一种agarose resin
准备买个NHS-activated agarose beads,指标说NHS-activated agarose is
crosslinked, 6% beaded agarose resin,这里的6%是什么意思?crosslinked是说什
么和什么crosslinked?
多谢!
D********A
发帖数: 1251
12
来自主题: EE版 - 高速信号的测试问题
PCB上怎么给走高速信号的track加testpoint?夹具测试可以用bead probe,手工测试
是不是要先焊线到bead probe上,再用示波器的probe夹住这些线。这样做靠谱么?还
是应该用别的方法?
w*****y
发帖数: 303
13
来自主题: Science版 - help in Magnetism
事情是这样的,我需要算一个superparamagnetic bead在
磁场中的受力,我找到一个公式
F=x*dB/dz*B
it says x is susceptibility. But as I know it is a
dimensionless parameter. So I need to find what is x.
What is more, I know the bead's magnetic susceptibility
is 1.0E-2(CGS units) which makes me more puzzling:(
Thanks a lot.
c****r
发帖数: 199
14
来自主题: WeddingBells版 - 还有不到两周要婚了
(婚纱)
10月份的时候,我开始试婚纱。先看了几本杂志,找到自己喜欢的型。再
从yelp上找review好的bridal shop, 打电话预约试纱。
第一个去的是david's bridal。明明预约了,跑到那里说找不到我的名字
,只能临时拉一个人帮我试。这个sales很pushy, 也不听我的意见。我说不喜欢bead,
她给我找的第一件全身都是bead。后面试的几件也没有完全符合我的意思。第一次试纱
很失败,对DB印象也很差。
第二个去的是个local小店,外表破破的,但是网上review很好。店主亲自
帮我试纱,我给她看我带去的杂志照片,她从店里拿出几件,件件都符合我的要求。我
有些不知道怎么取舍,她就帮我分析每一件的优点缺点。这里的服务比DB不知道好多少
,价格也不贵。
第三个也是local店,服务很好,纱纱也很pp, 无奈价格超出了我的budget。
在第二家店,我其实已经找到了the one,那种感觉很神奇,一穿上就觉得
对。当时觉得价格有点小贵。后来从网... 阅读全帖
v*******l
发帖数: 5042
15
来自主题: _Fly_Fishing_Club版 - 开始钓鳟鱼了
今天下水,开始用的橄榄色屋里八哥,中了几次鱼,但不活跃啊。于是换饵,最后发现
黑色bead head屋里八哥最好,下沉就攻击。而怪异的是黑色bead chain leech(俩眼
的)就不咬,还挺挑!
共上鱼10来条。
v*******l
发帖数: 5042
16
来自主题: _Fly_Fishing_Club版 - 图示最简版“无力八哥”!
无力八哥,目前是钓鳟鱼的比较有效的武器,对bass杀伤力也很大。据说其他鱼也不错
,也算是通杀饵之一。
fly fishing的精髓就是要自己制作合适的flies,只有自己针对实际情况制作、调整
flies的细节,例如颜色、大小、重量等,飞钓才能真正管用、才能真正多搞鱼!所谓
“细节决定成败”。建议弟兄们尽量自己学着制作,熟能生巧。
完整的原版Bead head无力八哥(加重型),为做到精美和耐用,制作相对复杂,材料
也昂贵一些,具体过程和材料以前有帖子。有兄弟反映说一没材料或者材料贵,二是做
不出来或者做出来很难看。琢磨、试验了一阵子,搞了这么个简化版无力八哥:利用较
少的、廉价的材料,同时大大简化了制作步骤和难度,实际应用中经过测试,和原始八
哥的效果不相上下。
(以下流程和图片对应)
1:材料:#10或#12直炳钩,1/8寸金色bead head,橄榄色或黑色marabou(毛毛,如果
搞不到,也可以使用普通羽毛根部的软一些的毛),Palmer Chen(人造亮丝线,小号
黑色或者橄榄色),焊锡丝。其中人造亮丝只有2块多钱,用来代替比较贵的细长颈羽
($40一包),同时去掉bod
w*******y
发帖数: 60932
17
[I searched and couldn't find this anywhere...h ope it's not a repost!]
Ten Thousand Villages
Use coupon code CELEBRATE for free shipping, no minimum. Worked for me at 11
Expires 9/21/10
Pendant choker/necklace $3 Link:
http://www.tenthousandvillages.com/gold-chain-pendant-choker
Ornament holiday card $1.75 Link:
http://www.tenthousandvillages.com/ornament-holiday-card
Beaded ring $2 Link:
http://www.tenthousandvillages.com/maasai-beaded-ring
Tassel earrings $3 Link:
http://www.tenthousandvilla
w*******y
发帖数: 60932
w*******y
发帖数: 60932
19
Link:
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WEDNESDAY DEAL! Diner Dinnerware & Accessories
Outlet $8.99 - 69.99
Orig. $39... 阅读全帖
w*******y
发帖数: 60932
20
Site: Ksl.com
Feather Extension Kit from Feather Fringe
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* Kit includes:
* 2 long feathers
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* 4 silicone beads to put feathers in hair
* Choose between blonde or brown beads at checkout
* 1 threader
* 1 set of pliers
* 1 instruction pa... 阅读全帖
w*******y
发帖数: 60932
21
All times posted are PST.
Arts, Crafts & Sewing
12:00 PM - Brother CP-6500 Computerized Sewing Machine:
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Automotive
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w*******y
发帖数: 60932
y*****l
发帖数: 5997
23
来自主题: _pennystock版 - [合集] 铀价格走势图
☆─────────────────────────────────────☆
tanmaomao (坛猫猫) 于 (Tue Nov 16 18:13:00 2010, 美东) 提到:
RT
☆─────────────────────────────────────☆
tanmaomao (坛猫猫) 于 (Tue Nov 16 18:24:25 2010, 美东) 提到:
发信人: tanmaomao (坛猫猫), 信区: Stock
标 题: Re: 铀价格走势图 (转载)
发信站: BBS 未名空间站 (Tue Nov 16 18:23:29 2010, 美东)
Ux U3O8 Price indicator is the longest-running weekly uranium price series,
used by the industry in sales contracts
☆─────────────────────────────────────☆
tanmaomao (坛猫猫) 于 (Wed Nov 17 09:34:37 20... 阅读全帖
s**********r
发帖数: 427
24
这不能算吧。我看他们做乘法用那什么Multiplication Bead Board
http://www.montessoriedutoys.com/Multiplication-Bead-Board-l-
24,1353,249.html
除法用那个division board
就和做游戏似的。感觉上介绍concept还很有用。但最后还是需要记的。
t********r
发帖数: 4908
25
☆─────────────────────────────────────☆
brenden (无) 于 (Mon May 3 19:56:35 2010, 美东) 提到:
阅读写作水平
social science and math
让我这后进娃的妈和后进娃有学习的目标
☆─────────────────────────────────────☆
springwinter (summer) 于 (Tue May 4 16:39:09 2010, 美东) 提到:
不好意思,首先强调一下我家老大绝对绝对不是什么牛蛙。比起板上的那些个神童们,
差得不是一点半点!!!
在这里我想说很普通的一点经历。希望和大家一起讨论。
我们家娃现在就快5岁半了。从出生到现在每一个所谓的milestone就和书里说得差不多
。该爬的时候爬,该走的时候走,该说话就说话。。。不记得那个指标超前了。小家伙
从小的时候呢就比较爱看书。当然不是看字,是那些个picture。要实在说有啥事是我
们没教,小家伙自己感兴趣的就是拼puzzle了。很小的时候就能自个拼稍稍复杂点的
puzzle。但也... 阅读全帖
t********r
发帖数: 4908
26
来自主题: _K12版 - 美国娃学乘法
今天闺女兴奋得告诉我:妈妈I learned Times today,Ms. XX helped me on the fir
st 3, I did the rest all right.我礼节性的表扬了,good smart, super, I love y
ou等每天要表扬一百次的词
晚上睡觉以前,她一定要show off "Times"
我于是打开电脑上的钟,问,这是几点?女儿不知道,然后突然醒悟,妈妈,这是cloc
k,你连times都不知道?然后找来纸和笔,1*1=1,我说哦,原来是这个times,然后女
儿继续show off,now I'm gonna teach you a really hard one
35*6
我眼睛放光一秒以后马上恢复正常(神童的想法在脑海里面停留了1/100秒以后我就用她
平时的behavior把自己否定了),镇定的问她,那你教我吧!
Beads! I need beads!!!!
我失望的告诉她,这是210,然后呵斥她赶快睡觉,我好继续回来灌水。
美国这学校,2+3娃娃都还要摆指甲,教个什么times????
c**i
发帖数: 6973
27
来自主题: ChinaNews版 - Yiwu + Shenzhen
(1) Dan Levin, China's Return To The Silk Road; China is reclaiming its
place as the world's megabazaar, with the city of Yiwu as its one-stop shop
for traders from the muslim world. Fast Company, July-August, 2011.
http://www.fastcompany.com/magazine/157/yiwu-china-muslim-trade
Quote:
"If China is the world's factory, then Yiwu is its showroom.
"Last year, China surpassed the U.S. as the No. 1 exporter to the Middle
East
"Today, 200,000 Middle Eastern traders make the trek to Yiwu every year,
a... 阅读全帖
c***s
发帖数: 70028
28
张艺谋执导的《金陵十三钗》上周上映,首周以1.5亿票房小胜1.425亿的《龙门飞甲》,在获得第 69届金球奖最佳外语片提名后,昨天又确定将以展映影片的身份,亮相明年2月举行的柏林电影节。《十三钗》让23岁的女主角倪妮成为了媒体的关注对象,而在影片频频举行的造势活动上,还有一位亲生“谋女郎”也相当抢眼,那就是张艺谋的女儿张末。《十三钗》从国外到国内的记者会,老谋子都偕曾留学美国修读电影的女儿张末结伴亮相,在场为好莱坞影星克里斯蒂安·贝尔做翻译,准备栽培女儿成接班人。
关心女儿婚姻
张艺谋于1986年与巩俐合作《红高粱》擦出爱火,1988年毅然决定与前妻离婚,留下5岁的女儿张末跟前妻一起生活,女儿一直怨恨父亲为新欢抛弃她们,直至其父与巩俐结束8年情,两父女感情才得以改善。老谋子只有这个宝贝女儿,故他很悉心栽培,高中毕业便送她往美国留学,后来在李安推荐下入读纽约大学电影系进修。
在留美读书期间,张末恋上从事金融业的托维,据悉老谋子对女儿跟外国人拍拖一直很反对,他甚至担心得飞去美国见“未来女婿”。为此两父女曾吵架,老谋子沮丧返回北京。张末后来要求男友学说普通话,学用筷子,终令父亲改观,2006... 阅读全帖
c**i
发帖数: 6973
29
来自主题: History版 - Diary of William Steinway
(1) Stuart Isacoff, Steinway on the Superhighway. Wall Street Journal, Mar
10, 2011.
http://online.wsj.com/article/SB1000142405
2748703954004576090011796364894.html
Note:
(a) Steinway & Sons
http://en.wikipedia.org/wiki/Steinway_%26_Sons
(founded in 1853 in New York City, by German immigrant Heinrich Engelhard
Steinweg (later Henry E. Steinway; 1797–1871))
(b) William Steinway
http://en.wikipedia.org/wiki/William_Steinway
(1835-1896; born in Germany; the fourth son of Henry Engelhard Steinway; H... 阅读全帖
w********9
发帖数: 8613
30
中国有常见的大学英文字典吗?
而英美有各种分级的学生字典。
英文要查字典,很多情况下是为查意思,更多是为了查读音。
I take it you already know
Of tough and bough and cough and dough?
Others may stumble but not you,
On hiccough, thorough, lough, and through?
Well done! And now you wish, perhaps,
To learn of less familiar traps?
Beware of heard, a dreadful word
That looks like beard and sounds like bird,
And dead: it's said like bed, not bead --
For goodness sake don't call it 'deed'!
Watch out for meat and great and threat
(They rhyme with suite and str... 阅读全帖
h***i
发帖数: 89031
31
来自主题: History版 - 没有文化的装逼分子不要跑
这是泰戈尔差不多最好的诗歌了
Leave this chanting and singing and telling of beads!
Whom dost thou worship in this lonely dark corner of a temple with doors all
shut?
Open thine eyes and see thy God is not before thee!
He is there where the tiller is tilling the hard ground
and where the pathmaker is breaking stones.
He is with them in sun and in shower,
and his garment is covered with dust.
Put off thy holy mantle and even like him come down on the dusty soil!
你们说说这里的意境是什么
下面是海子随便一首
北方仓库,墓上有
几只默默的稻粒
石鸟刻着歌曲
墓门... 阅读全帖
t*******h
发帖数: 2882
32
http://news.bbc.co.uk/2/hi/asia-pacific/8605549.stm
Mongolia on verge of mineral boom
Homes of new migrants on the edge of Ulan Bator
The mining of vast mineral deposits is set to transform Mongolia's economy
By Linda Pressly,
BBC Radio 4, Crossing Continents
In a tasteful black and chrome interior, there are rails of perfectly placed
turquoise jackets. There are shoes and belts, and black beaded tops with a
price tag of over $700 (£460). This is the brand new Emporio Armani
store off Sukhb
c*******2
发帖数: 617
33
From disgusting NYT:
On Saturday morning, the monks ferried 1,400 bodies from the city’s main
monastery to a dusty rise overlooking the city.
There, in two long trenches filled with salvaged wood, they dumped the dead
and set cremation pyres ablaze.
As the fires burned for much of the day, hundreds of mourners sat mutely on
a hillside next to the monks, who chanted aloud or quietly counted prayer
beads of red coral and turquoise.
The police and Han officials were conspicuously absent.
NYT dares
g***j
发帖数: 40861
34
DWIGHT EISENHOWER
Vacations Aren't Good For You
Eisenhower was just a few months into his first term when he took his first
vacation, in Augusta, Georgia, at his favorite golf club. There he suffered
what now appears to have been his first presidential heart attack. (He'd had
another apparent heart attack in 1949, which was covered up.) His spokesman
put out the word that Ike was suffering from indigestion. Unfortunately,
Ike could not afford to rest. The very next day he was scheduled to return... 阅读全帖
S*********y
发帖数: 481
35
用偷盗来的苹果产品通过itune连接因特网,结果被苹果跟踪锁定
Steve Jobs home burglary suspect accused of stealing wallet, driver's
license, special computers with house key
By Mike Rosenberg and Jason Green
Staff writers
© Copyright 2012, Bay Area News Group
Posted: 08/14/2012
PALO ALTO -- Detectives say Kariem McFarlin told them he was desperate for
easy cash when he saw the Palo Alto home being renovated, hopped over the
fence, found a spare key and went inside. No lights, no alarm, no one home.
Then he discovered ... 阅读全帖
T**********e
发帖数: 29576
36
http://www.dailydot.com/society/zhu-ling-sun-wei-petition-case/
The heartbreaking saga of Zhu Ling
By Kevin Morris
In a grainy, black-and-white video of her final performance, Zhu Ling sweeps
across the stage in a black skirt and white blouse before taking a seat
behind a guqin, the six-stringed Chinese zither. She's been feeling sick
recently, and you can tell she's a little nervous. But her fingers are
precise. They pluck out a cautious melody.
Zhu has no idea she's been poisoned.
A heavy meta... 阅读全帖
w********9
发帖数: 8613
37
来自主题: Military版 - 惊讶于德国人的英语能力
这是Shorter Oxford American English Dictionary第五版列出的与德语或者日耳曼语
相关的英语词根或词汇。
-at, suffix2. + -dom, suffix. + -ed, suffix1. + -ed, suffix2. + -en, suffix1
+ -en, suffix2 + -en, suffix5 + -en, suffix6 + -er, suffix1. + -er, suffix3
. + -er, suffix5. + -est, suffix1. + -est, suffix2. + -et, suffix2. + -eth,
suffix1. + -hood, suffix. + -ing, suffix1. + -ing, suffix3. + -ish, suffix1.
+ -kin, suffix. + -le, suffix1 + -le, suffix3 + -less, suffix. + -ling,
suffix1. + -ling, suffix2 + -ly, suffix1. + -ly, s... 阅读全帖
D*********n
发帖数: 279
38
来自主题: Military版 - Native Americans in the United States
http://en.wikipedia.org/wiki/Native_Americans_in_the_United_Sta
Native Americans in the United States
From Wikipedia, the free encyclopedia
Jump to: navigation, search
"American Indian" redirects here. For other indigenous peoples, see
Indigenous peoples of the Americas and other geographic regions. For
Americans from South Asia, see Indian American.
This article may be too long to read and navigate comfortably. Please
consider splitting content into sub-articles and/or condensing it. (January
2... 阅读全帖
Y****N
发帖数: 8694
39
来自主题: Military版 - 新人家防的不二首选 (转载)
【 以下文字转载自 GunsAndGears 讨论区 】
发信人: qingshi601 (青石村), 信区: GunsAndGears
标 题: 新人家防的不二首选
发信站: BBS 未名空间站 (Thu May 8 16:02:30 2014, 美东)
前几天带两个兄弟(姑且叫他们老L和老C吧)去试枪, 两位都是网上认识,从未谋面
。 见过C的夫人, 热心爽朗,绝对是个对脾气的, 不是一家人不进一家门, 老C也错
不了。两位除了几十年前大学军训外也没打过枪。 前一阵子在Dicks一起买了Benelli
Nova Tacital, 还没试过。
Benelli Nova Tacital是18寸半的枪管, 不到我常去的室外碟场23寸最短管长的规定
, 不能去。 唯一的选择就是室内靶场了。 室内只让打buckshot或slug, 弹药成本高
了些, 好在他两位初次打枪也打不多。 靶场门口见面后发现两位都和我差不多年纪,
举止沉着稳重, 让我放心。 他们的枪袋、耳罩都是一样, 连擦枪工具也是一样,
刚刚从店里一起买的, 我笑他们一看就是一个帮派的。
四月阳春的天气, 靶场内居然还开着暖气... 阅读全帖
f**e
发帖数: 3343
40
Al+NaOH确实有H2产生,但是(跟我说的一样)不是金属球持续运动的原因
However, bubbles are observed on the uncoated surface without occurrence of
the motion. NaOH solution with higher concentration accelerates the bubble
generation, but the
sphere stays still, demonstrating that the force from the bubble recoil is
insuffi cient to actuate the autonomous locomotion of a rigid bead
金属球运动真正的mechanism
Figure 3. Working mechanism for the self-fueled liquid metal motor. a) The
fl ow fi eld of the solution in the channel induced by t... 阅读全帖
O*******o
发帖数: 7091
41
来自主题: Military版 - 关于清华的金属机器
ok, then you say say, what was the force pushing the bead moving around?
physical? chemical? atomic?
f**e
发帖数: 3343
42
来自主题: Military版 - 关于清华的金属机器
Al+NaOH确实有H2产生,但是(跟我说的一样)不是金属球持续运动的原因
However, bubbles are observed on the uncoated surface without occurrence of
the motion. NaOH solution with higher concentration accelerates the bubble
generation, but the
sphere stays still, demonstrating that the force from the bubble recoil is
insuffi cient to actuate the autonomous locomotion of a rigid bead
金属球运动真正的mechanism
Figure 3. Working mechanism for the self-fueled liquid metal motor. a) The
fl ow fi eld of the solution in the channel induced by t... 阅读全帖
s*****n
发帖数: 1998
43
来自主题: Military版 - 白妞的几个特点
一个是脱衣服的时候,跟蛇蜕皮一样,不管几层一幅,一下子就蜕出来了, 优点是快
速, 缺点是少了点含蓄
一个是适龄白妞, 基本上都配备快乐器, 有的用跳蛋,有的用dildo,最近看到的
一个大白牛,用国产的 luna beads
一个是年轻的白妞, 手机里都少不了鸡巴特写,都是男性朋友发的,也少不了自己的
裸照
s*****n
发帖数: 1998
44
还有一个棒女留下的小巧玲珑的震动器,大白牛的震动棒都是又大又粗, 还有个波兰女
留下了串珠子,国产的lunar bead。
W*****B
发帖数: 4796
45
最近借着黑豹的东风涌现出很多新词儿,让人迎接不暇,什么是Afrofuturism?
How the Afrofuturism behind Black Panther and Get Out combines social
justice and sci-fi
Afrofuturist ideas are at the core of both films.
In the fictional African nation of Wakanda, beads made of “vibranium” heal
bullet wounds, and a bulletproof suit absorbs and stores the energy of
hostile blows. Levitating trains cruise past vaulting skyscrapers with
thatched roofs, as saucer-shaped aircraft carve arcs in the sky.
Wakanda, a fantasy nation that serves... 阅读全帖
b*********3
发帖数: 1709
46
来自主题: Military版 - 帝国的代价
Now, the problem with a colonial mentality, attitude, society, way of life
is this. What happens when you run out of stuff to colonize? After all,
sooner or later, you’re going to run out of tempting frontiers, helpless
savages, Manhattans to trade for beads, fish in the ocean, and so on, right?
That day might seem a long way away — but it has to come,
after all. Well, then, my friends, you are screwed — if you can
’t give up the colonial mindset, then you will have to co... 阅读全帖
b*********3
发帖数: 1709
47
来自主题: Military版 - 帝国的代价
But violence and greed and cruelty cannot lead anyone anymore to prosperity
in the 21st century. There is nobody left to colonize and exploit left but
yourself, your very own society, in a world which is out of easy frontiers
and helpless peoples. Nobody’s trading Manhattans for beads anymore, are
they? And so violence and greed is only left in one form: self-destruction.
Funnily, ironically, foolishly, tragically, the only choice that English
speaking world seem able to make anymore is self-des... 阅读全帖
a*********n
发帖数: 390
48
【 以下文字转载自 GunsAndGears 讨论区 】
发信人: qingshi601 (青石村), 信区: GunsAndGears
标 题: 完全新手的第一枝家防枪该买什么?《霰弹枪篇》
发信站: BBS 未名空间站 (Fri Oct 7 16:09:07 2016, 美东)
最近福建女老板开枪勇斗入室歹徒的事在美国华人圈掀起了不小的波澜, 赞佩其勇气
果决的同时, 又让大家觉得以往只有在小说电影里见到的犯罪场景其实离自己并不太
远。 加上某族裔饶舌歌手鼓励去抢华人的歌曲被挖出来面世及一系列针对华人的犯罪
案件, 很多人觉得必须去买一杆枪。其实这是居安思危, 对自己对家人孩子负责的表
现。 那么买什么枪呢?
答案很简单: 霰弹枪或手枪
买枪其实是个非常“私人”的事情, 并不能一概而论。 有人喜欢手枪, 有人喜欢用
半自动步枪, 各有优缺点。 其实最关键的, 是要有一枝关键时刻拿得出来, 打得响
打得准的枪。福建女老板用的S&W SD9便宜货不也以一敌三重创敌人? 新手买枪, 强
烈建议到枪店或枪展上握一下实物, 或者先去上个训练课后到靶场租点枪打一下体会
体会再决定。 笔者... 阅读全帖
gq
发帖数: 321
49
来自主题: Olympics版 - sago tea
how was the sago made into little beads??
l****z
发帖数: 29846
50
5 Best Youth Guns for Christmas
It’s Christmas time, and no doubt many people are out there shopping with a
vengeance, desperately trying to find that “perfect” gift for your kids.
What better gift says “I love you” than a good, old-fashioned, tried-and-
true FIREARM! Forget the video games this year. Just read this article and
you’ll have the basic starting point for your children’s firearm shopping
quest.
I’ve taken several factors into account, most notably: safety, ease of use
, and afforda... 阅读全帖
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