scholarly journals Summer reproduction of the planktonic copepod Calanus sinicus in the Yellow Sea: influences of high surface temperature and cold bottom water

2007 ◽  
Vol 29 (2) ◽  
pp. 179-186 ◽  
Author(s):  
Guang-Tao Zhang ◽  
Song Sun ◽  
Bo Yang
Keyword(s):  
Surface Temperature ◽  
Yellow Sea ◽  
Bottom Water ◽  
High Surface ◽  
The Yellow Sea ◽  
Calanus Sinicus ◽  
Planktonic Copepod ◽  
High Surface Temperature

Feeding and egg production of the planktonic copepod Calanus sinicus in spring and autumn in the Yellow Sea, China

2008 ◽  
Vol 30 (6) ◽  
pp. 723-734 ◽  
Author(s):  
Y.-Z. Huo ◽  
S.-W. Wang ◽  
S. Sun ◽  
C.-L. Li ◽  
M.-T. Liu
Keyword(s):  
Yellow Sea ◽  
Egg Production ◽  
The Yellow Sea ◽  
Calanus Sinicus ◽  
Planktonic Copepod

scholarly journals Isolation and Characterization of a Biosurfactant Producing Strain Planococcus sp. XW-1 from the Cold Marine Environment

2022 ◽  
Vol 19 (2) ◽  
pp. 782
Author(s):  
Ping Guo ◽  
Weiwei Xu ◽  
Shi Tang ◽  
Binxia Cao ◽  
Danna Wei ◽  
...  
Keyword(s):  
Low Temperature ◽  
Carbon Source ◽  
Crude Oil ◽  
Surface Activity ◽  
Yellow Sea ◽  
High Surface ◽  
Sole Source ◽  
The Yellow Sea ◽  
Isolation And Characterization ◽  
First Time

One cold-adapted strain, named Planococcus sp. XW-1, was isolated from the Yellow Sea. The strain can produce biosurfactant with petroleum as sole source of carbon at low temperature (4 °C). The biosurfactant was identified as glycolipid-type biosurfactant species by thin-layer chromatography (TLC) and Fourier transform infrared spectroscopy (FTIR). It reduced the surface tension of water to 26.8 mN/m with a critical micelle concentration measurement of 60 mg/L. The produced biosurfactant possesses high surface activity at wide ranges of temperature (−18–105 °C), pH values (2–12), and salt concentrations (1–18%). The biosurfactant exhibited higher surface activity and higher growth rate of cells with hexadecane and diesel as carbon source. The strain Planococcus sp. XW-1 was also effective in degrading crude oil, after 21 days of growth at 4 °C in medium with 1% crude oil and 1% (v/v) bacteria broth, 54% of crude oil was degraded. The results suggest that Planococcus sp. XW-1 is a promising candidate for use in the bioremediation of petroleum-contaminated seawater in the Yellow Sea during winter. This study reported for the first time that Planococcus isolated from the Yellow Sea can produce biosurfactant using petroleum as the sole carbon source at low temperature (4 °C), showing its ecological role in the remediation of marine petroleum pollution.

scholarly journals Models for Nuclei of Planetary Nebulae and for Ultraviolet Stars

1974 ◽  
Vol 59 ◽  
pp. 113-114
Author(s):  
J. Katz ◽  
R. Malone ◽  
E. E. Salpeter
Keyword(s):  
Surface Temperature ◽  
Total Mass ◽  
High Surface ◽  
Planetary Nebulae ◽  
Red Giants ◽  
High Luminosity ◽  
Stages Of Development ◽  
Initial Carbon ◽  
High Surface Temperature ◽  
Central Stars

A series of stellar models were evolved, all with a total mass of 0.65 M⊙, an initial carbon-oxygen core of mass 0.60 M⊙, an intermediate helium mantle and an outer hydrogen-rich envelope with mass varying from case to case. Although the most hydrogen-rich cases resulted in red giants, cases with ≲ 0.01 M⊙ in the hydrogen envelope evolved at high surface temperature. The early stages of development of these models are similar to observed central stars of planetary nebulae. The later stages (when the nebula should be very thin optically) still have a high luminosity; the relevance to ‘ultraviolet stars’ will be discussed.

TEX 86 paleothermometer as an indication of bottom water temperature in the Yellow Sea

2015 ◽  
Vol 86 ◽  
pp. 19-31 ◽  
Author(s):  
Lei Xing ◽  
Julian P. Sachs ◽  
Wenxian Gao ◽  
Shuqing Tao ◽  
Xiaochen Zhao ◽  
...  
Keyword(s):  
Water Temperature ◽  
Yellow Sea ◽  
Bottom Water ◽  
The Yellow Sea ◽  
Bottom Water Temperature
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