Abstract：
:Stomatogenesis in ciliates is a complex and carefully orchestrated event. The exo- mutant SB255 of Tetrahymena thermophila has defects in mucocyst formation and docking and can also have one or two mouths. Three common culture media (proteose peptone, Medium 357, and yeast extract) were analyzed for total C, N, and inorganic elements and then tested for their effect on the number of mouths present in SB255. Cultures of SB255 grown in Medium 357 consisted of a mixed population of cells with either two mouths (doublet) or one mouth. Cultures from the same original stock grown in Medium 357 (SBm) and in 1% proteose peptone (SBpp) had different percentages of doublet cells in 1-, 2-, 3-, and 4-d-old cultures. When transferred to and grown in 1% yeast medium, both SBpp and SBm cultures had increased percentages of doublets over a 4-d culture period. When grown in 0.1, 0.5, or 1% yeast medium for 2 d, both SBpp and SBm cultures had more doublets in 1% than in either 0.1 or 0.5% yeast medium. Cultures of SBm grown in Medium 357 or 1% yeast medium for 2 d had a 10-fold increase in doublet cells compared to the inoculum. After 2 d in 1% proteose peptone, SBm cultures had percentages of doublet cells almost equal to that of the inoculum. Immunofluorescence and scanning electron microscopy (SEM) were used to examine cellular morphology of the doublet cells. These findings suggest that enriched media promote the growth of doublet cells. Furthermore, these doublets could prove to be a useful model system for the study of biological roles of trace elements.
journal_name
Biol Trace Elem Resjournal_title
Biological trace element researchauthors
Christopher GK,Sundermann CAdoi
10.1007/BF02785409subject
Has Abstractpub_date
1995-12-01 00:00:00pages
181-91issue
3eissn
0163-4984issn
1559-0720journal_volume
50pub_type
杂志文章abstract：:The element Zn is the metal component or activator of many important enzymes. The tissue concentrations and activities of Zn metalloenzymes direct the rate of protein and nucleic acid syntheses, thereby influencing tissue growth and reperative processes. Most of the serum Zn is normally bound to circulating proteins. ...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02786257
更新日期：1996-08-01 00:00:00
abstract：:The objective of the present study was to evaluate the potential effect of maternal cadmium exposure on pregnancy outcome and development in the offspring at age 4.5 years. Between November 2002 and December 2003, 109 normal pregnant women were enrolled in our cohort from Da-Ye Country, Hubei Province in Central China...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-009-8391-0
更新日期：2009-12-01 00:00:00
abstract：:A semiquantitative ICP-MS method suitable for evaluating metal content in plants exposed to high metal concentrations is described. The methodology which has been tested using different plant reference material is able, in only a few minutes, to obtain qualitative and quantitative information from the sample. Recoveri...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-011-9140-8
更新日期：2011-12-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-020-02059-1
更新日期：2020-11-01 00:00:00
abstract：:In present study, the levels of some toxic elements in 19 different home-made cosmetic products (spray hair dye, henna, tattoo, eyeliner, eye mascara, smear, lip moisturizer, and lipstick) were analyzed by inductively coupled plasma mass spectrometric (ICP-MS) after microwave digestion. The ICP-MS results were verifie...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-020-02357-8
更新日期：2020-09-05 00:00:00
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journal_title：Biological trace element research
pub_type： 临床试验,杂志文章
doi：10.1385/bter:83:2:133
更新日期：2001-11-01 00:00:00
abstract：:Results from several medical investigations carried out using the Oxford scanning proton microprobe are presented, including maps of the hepatic copper-distribution in primary biliary cirrhosis and maps of the iron distribution in primary hemochromatosis. Preliminary studies of human nervous tissue reveal that morphol...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02796626
更新日期：1987-08-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-015-0406-4
更新日期：2016-01-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-017-1141-9
更新日期：2018-06-01 00:00:00
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journal_title：Biological trace element research
pub_type： 临床试验,杂志文章
doi：10.1385/BTER:76:3:217
更新日期：2000-09-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02917246
更新日期：1989-07-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章,meta分析
doi：10.1007/s12011-017-0982-6
更新日期：2017-10-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-014-9940-8
更新日期：2014-06-01 00:00:00
abstract：:Studies investigating the effects of Chromium (Cr) supplementation on unstressed broiler chickens have reported an inconsistent association between Cr supplementation and broiler chickens' responses. We conducted a dose-response meta-analysis of previous studies to assess the dose-response associations between Cr supp...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-021-02589-2
更新日期：2021-01-17 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02784598
更新日期：1992-01-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-014-0189-z
更新日期：2015-02-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-018-1489-5
更新日期：2019-06-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02990125
更新日期：1988-01-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章,meta分析,评审
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更新日期：2018-04-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
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更新日期：2021-01-06 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02789141
更新日期：1990-01-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-008-8170-3
更新日期：2008-12-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-010-8782-2
更新日期：2011-09-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02820027
更新日期：1998-04-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1385/BTER:100:3:229
更新日期：2004-09-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02789402
更新日期：1993-04-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02783726
更新日期：1992-11-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章,评审
doi：10.1007/s12011-018-1464-1
更新日期：2019-03-01 00:00:00
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journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/BF02992719
更新日期：1990-07-01 00:00:00
abstract：:The present study was aimed at estimating the current (2012) dietary intake of arsenic (As), cadmium (Cd), mercury (Hg), and lead (Pb) by the population of Catalonia, Spain. The temporal trends with respect to previous surveys, performed in 2000, 2005, and 2008, were also determined. For that purpose, metal concentrat...
journal_title：Biological trace element research
pub_type： 杂志文章
doi：10.1007/s12011-014-0138-x
更新日期：2014-12-01 00:00:00
