scholarly journals Organic Compounds in Heavy Oils Reached to Niigata Coastal Area II. Compositions and Variation.

1997 ◽  
Vol 7 (4) ◽  
pp. 831-840
Author(s):  
Kuniaki KAWATA ◽  
Hideko MITOBE ◽  
Tsuyoshi IBARAKI ◽  
Ryozo TAMURA ◽  
Masaaki SAKAI ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Coastal Area ◽  
Heavy Oils

scholarly journals Oil Spill Accident in the Japan Sea. Organic Compounds in Heavy Oils Reached to Niigata Coastal Area.

1997 ◽  
Vol 7 (3) ◽  
pp. 533-543 ◽  
Author(s):  
Kuniaki KAWATA ◽  
Akiko TANABE ◽  
Hideko MITOBE ◽  
Masaaki SAKAI ◽  
Ikuei KIFUNE
Keyword(s):  
Organic Compounds ◽  
Oil Spill ◽  
Coastal Area ◽  
Japan Sea ◽  
Heavy Oils ◽  
The Japan Sea

ECOLOGICAL ASSESSMENT IN SEMARANG COASTAL WATER

2013 ◽  
Vol 5 (1) ◽  
Author(s):  
Ricky Rositasari ◽  
Lestari Lestari ◽  
Lestari Lestari ◽  
Lestari Lestari
Keyword(s):  
Heavy Metal ◽  
Health Status ◽  
Organic Compounds ◽  
Coastal Water ◽  
Coastal Area ◽  
Human Activities ◽  
Ecological Assessment ◽  
Land Area ◽  
Progressive Development ◽  
Coastal Land

Coastal water is vulnerable to anthropogenic substances such as human activities by product in coastal land and  upper land area. Semarang coastal area is one of areas which has progressive development in northern coastal of Java Island.  The aim of this study was to evaluate ocean health status based on heavy metal contain and benthic foraminiferal characteristics as the bioindicator.  Sampling and laboratory activities were carried out in August 2010. Sampling stations were located on the estuaries of Western Canal Flood, Tanjung Mas Port and  Eastern Canal Flood.  The result showed that Tanjung Mas pool port had the highest Pb, Zn,and Total Organic Compounds (TOC) concentrations. The average of abnormal test of benthic foraminiferal (Ammonia beccarii) were also higher in Tanjung Mas port than in eastern and western canal flood. Keywords: assessment, coastal water, Semarang.

scholarly journals ECOLOGICAL ASSESSMENT IN SEMARANG COASTAL WATER

2013 ◽  
Vol 5 (1) ◽  
Author(s):  
Ricky Rositasari ◽  
Lestari Lestari ◽  
Lestari Lestari ◽  
Lestari Lestari
Keyword(s):  
Heavy Metal ◽  
Health Status ◽  
Organic Compounds ◽  
Coastal Water ◽  
Coastal Area ◽  
Human Activities ◽  
Ecological Assessment ◽  
Land Area ◽  
Progressive Development ◽  
Coastal Land

<p>Coastal water is vulnerable to anthropogenic substances such as human activities by product in coastal land and  upper land area. Semarang coastal area is one of areas which has progressive development in northern coastal of Java Island.  The aim of this study was to evaluate ocean health status based on heavy metal contain and benthic foraminiferal characteristics as the bioindicator.  Sampling and laboratory activities were carried out in August 2010. Sampling stations were located on the estuaries of Western Canal Flood, Tanjung Mas Port and  Eastern Canal Flood.  The result showed that Tanjung Mas pool port had the highest Pb, Zn,and Total Organic Compounds (TOC) concentrations. The average of abnormal test of benthic foraminiferal (<span style="text-decoration: underline;">Ammonia</span> <span style="text-decoration: underline;">beccarii</span>) were also higher in Tanjung Mas port than in eastern and western canal flood.</p> <p>Keywords: assessment, coastal water, Semarang.</p>

scholarly journals Source region identification and source apportionment of volatile organic compounds in the Tokyo Bay coastal area, Japan

2021 ◽  
Vol 9 ◽  
pp. 100103
Author(s):  
Yukiko Fukusaki ◽  
Yuka Kousa ◽  
Masataka Umehara ◽  
Maiko Ishida ◽  
Reiko Sato ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Source Apportionment ◽  
Organic Compounds ◽  
Coastal Area ◽  
Source Region ◽  
Tokyo Bay ◽  
Volatile Organic

The Tempo and mode(S) of Prebiotic Evolution

1997 ◽  
Vol 161 ◽  
pp. 419-429 ◽  
Author(s):  
Antonio Lazcano
Keyword(s):  
Origin Of Life ◽  
Organic Compounds ◽  
Biological Evolution ◽  
Current Evidence ◽  
Early Diversification ◽  
Time Period ◽  
The Galaxy ◽  
History Of ◽  
Widespread Phenomenon ◽  
The Origin Of Life

AbstractDifferent current ideas on the origin of life are critically examined. Comparison of the now fashionable FeS/H2S pyrite-based autotrophic theory of the origin of life with the heterotrophic viewpoint suggest that the later is still the most fertile explanation for the emergence of life. However, the theory of chemical evolution and heterotrophic origins of life requires major updating, which should include the abandonment of the idea that the appearance of life was a slow process involving billions of years. Stability of organic compounds and the genetics of bacteria suggest that the origin and early diversification of life took place in a time period of the order of 10 million years. Current evidence suggest that the abiotic synthesis of organic compounds may be a widespread phenomenon in the Galaxy and may have a deterministic nature. However, the history of the biosphere does not exhibits any obvious trend towards greater complexity or «higher» forms of life. Therefore, the role of contingency in biological evolution should not be understimated in the discussions of the possibilities of life in the Universe.

Microscopic versus process parameters in heavy-oil upgrading

1992 ◽  
Vol 50 (1) ◽  
pp. 366-367
Author(s):  
V.A. Munoz ◽  
R.J. Mikula ◽  
C. Payette ◽  
W.W. Lam
Keyword(s):  
Molecular Weight ◽  
Liquid Fuels ◽  
Chemical Components ◽  
Heavy Oils ◽  
Synthetic Fuels ◽  
High Hydrogen ◽  
Optical Texture ◽  
Polar Groups ◽  
Anisotropic Character ◽  
Planar Molecules

The transformation of high molecular weight components present in heavy oils into useable liquid fuels requires their decomposition by means of a variety of processes. The low molecular weight species produced recombine under controlled conditions to generate synthetic fuels. However, an important fraction undergo further recombination into higher molecular weight components, leading to the formation of coke. The optical texture of the coke can be related to its originating components. Those with high sulfur and oxygen content tend to produce cokes with small optical texture or fine mosaic, whereas compounds with relatively high hydrogen content are likely to produce large optical texture or domains. In addition, the structure of the parent chemical components, planar or nonplanar, determines the isotropic or anisotropic character of the coke. Planar molecules have a tendency to align in an approximately parallel arrangement to initiate the formation of the nematic mesophase leading to the formation of anisotropic coke. Nonplanar highly alkylated compounds and/or those rich in polar groups form isotropic coke. The aliphatic branches produce steric hindrance to alignment, whereas the polar groups participate in cross-linking reactions.

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