Characteristics and Mechanisms of Mercury Resistance of the Anaerobic Bacteria Isolated from Mercury Polluted Sea Bottom Sediment

2001 ◽  
pp. 155-165
Author(s):  
Masaru Narita ◽  
Ginro Endo
Keyword(s):  
Bottom Sediment ◽  
Anaerobic Bacteria ◽  
Mercury Resistance ◽  
Sea Bottom

scholarly journals Formation of Reduced Conditions of Sea Bottom Sediment in Yong-Won Bay, Korea

2013 ◽  
Vol 69 (2) ◽  
pp. I_1136-I_1140
Author(s):  
Takayuki NAKAOKA ◽  
In-Cheol LEE ◽  
Shinya NAKASHITA ◽  
Tadashi HIBINO
Keyword(s):  
Bottom Sediment ◽  
Sea Bottom

Effects of anaerobe in sea bottom sediment on the corrosion of carbon steel

1998 ◽  
Vol 16 (4) ◽  
pp. 377-380
Author(s):  
Ma Shi-de ◽  
Huang Yan-liang ◽  
Zhu Su-lan ◽  
Sun Jia-rui ◽  
Du Ai-ling
Keyword(s):  
Carbon Steel ◽  
Bottom Sediment ◽  
Sea Bottom

scholarly journals Kajian Karakteristik Sedimen Dasar di Perairan Sungailiat untuk Mendukung Pengembangan Pelabuhan Perikanan Nusantara Sungailiat, Kab. Bangka

2021 ◽  
Vol 10 (2) ◽  
pp. 112-122
Author(s):  
Reno Arief Rachman ◽  
Mardi Wibowo ◽  
Edwin Adi Wiguna ◽  
Sapto Nugroho ◽  
Madyani Madyani ◽  
...  
Keyword(s):  
Bottom Sediment ◽  
Sedimentation Velocity ◽  
Provincial Government ◽  
Sediment Texture ◽  
Sediment Characteristics ◽  
Sediment Control ◽  
Port Development ◽  
Field Surveys ◽  
Sea Bottom ◽  
Very High

Tingkat sedimentasi di muara S. Jelitik sangat tinggi sehingga ketika air laut surut, kapal-kapal tidak dapat keluar masuk ke Pelabuhan Perikanan Nusantara (PPN) Sungailiat. Untuk menangani masalah tersebut, pemerintah secara periodik melakukan pengerukan yang berbiaya tinggi. Oleh karena itu, Pemprov Bangka Belitung merencanakan membangun infrastruktur pengendali sedimen. Dalam perencanaan infrastruktur pengendali sedimen diperlukan data-data karakteristik sedimen dasar. Saat ini kajian khusus karateristik sedimen dasar di kawasan ini masih belum ada. [A1] Oleh karena itu dilakukan kajian ini dengan tujuan mengetahui pola sebaran karakteristik sedimen dasar seperti berat jenis, tekstur sedimen, ukuran d50 butir sedimen dan analisis stastik sedimen dasar. Karakteristik ini sangat penting untuk kajian sedimentasi selanjutnya terutama sebagai data masukan perhitungan kecepatan sedimentasi baik secara analitik maupun dengan pemodelan numerik. Metode yang digunakan dalam kajian ini adalah survei lapangan, pengambilan sampel sedimen dasar, analisis laboratorium dan analisis statistik sedimen. Berdasarkan kajian ini sedimen dasar di perairan Sungailiat ini didominasi oleh pasir sedikit campuran kerikil dengan nilai d50 berkisar antar 1-1,5 mm dan terpilah buruk. Kondisi sedimen dasar berupa pasir mempunyai daya dukung yang baik untuk pengembangan pelabuhan.Sedimentation in the S Jelitik estuary is very high, so when the tide is low, the ships traffic at the Sungailiat Fisheries Port is disturbed. So far, dredging has been done to solve this problem, which requires high costs. To overcome this, the Provincial Government of Bangka Belitung plans to build a sediment control infrastructure. In planning the sediment control infrastructure, sea bottom sediment characteristics data are needed. Currently, there is no specific study of se bottom sediment characteristics in this area. Therefore, this study was conducted with the aim of knowing the distribution pattern of seabottom sediment characteristics such as density, sediment texture, d50 grain size and analysis of the basic sediment statistics. This characteristic is very important for further sedimentation studies, especially as input data for calculating the sedimentation velocity both analytically and by numerical modeling. The methods used in this study are field surveys, sediment sampling, laboratory analysis and sediment statistical analysis. Based on this study, the seabottom sediment in Sungailiat waters is dominated by sand, a little mixture of gravel, with d50 values ranging from 1-1.5 mm and poorly segregated. The seabottom sediment in the form of sand have good capacity for port development.  

Sedimentology and ichnology of Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków- Silesia Homocline, Poland

2012 ◽  
Vol 62 (3) ◽  
pp. 281-296 ◽  
Author(s):  
Paulina Leonowicz
Keyword(s):  
Bottom Sediment ◽  
Middle Jurassic ◽  
Trace Fossil ◽  
Fair Weather ◽  
Nearshore Area ◽  
Sedimentary Structures ◽  
Sea Bottom ◽  
Sw Poland ◽  
Storm Deposits ◽  
Marine Basin

ABSTRACT Leonowicz, P. 2012. Sedimentology and ichnology of Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Krakow-Silesia Homocline, Poland. Acta Geologica Polonica, 62 (3), 281-296. Warszawa. The lithology, sedimentary structures and trace fossil association from the Bathonian organic-rich mudstones from Krakow-Silesia Homocline (SW Poland) are described and a preliminary interpretation of the palaeoenvironment is presented. The ore-bearing clays exposed in the Gnaszyn clay-pit are developed as dark grey claysilt deposits with a few horizons of sideritic concretions. Sedimentological analysis has revealed that these deposits originated in the offshore part of a marine basin, below the fair weather wave base. Relict parallel lamination suggests that the predominant mechanism of deposition was quiet settling from suspension. However, locally preserved storm deposits indicate that the sea bottom was affected by offshore flows, deriving coarser material from the nearshore area. The degree of bioturbation is high but the diversity of the trace-fossil association is low. It consists mainly of Chondrites, Trichichnus, pyritized burrows and less common Palaeophycus. Other traces, including Thalassinoides, Planolites, Taenidium and some undetermined burrows, occur mainly in the lower part of the succession. This ichnoassociation combines features of distal Cruziana and Zoophycos ichnofacies, suggesting poor oxygenation of the bottom sediment. Temporary improvements in bottom oxygenation, linked with more intense mixing of water during major storms, resulted in the more diverse trace fossil suite that is found in some intervals of the succession.

scholarly journals Burning Characteristic of Organic Matter deposited on Sea Bottom Sediment

2011 ◽  
Vol 67 (2) ◽  
pp. I_1156-I_1160
Author(s):  
Masataka IMAGAWA ◽  
Narong TOUCH ◽  
Shinya NAKASHIATA ◽  
Tadashi HIBINO
Keyword(s):  
Organic Matter ◽  
Bottom Sediment ◽  
Sea Bottom

Determination of mercury and organomercurial resistance in obligate anaerobic bacteria

1985 ◽  
Vol 31 (3) ◽  
pp. 276-281 ◽  
Author(s):  
James T. Rudrik ◽  
Roger E. Bawdon ◽  
Stephen P. Guss
Keyword(s):  
Escherichia Coli ◽  
Minimum Inhibitory Concentration ◽  
Inhibitory Concentration ◽  
Anaerobic Bacteria ◽  
Enterobacter Cloacae ◽  
Mercury Resistance ◽  
Plasmid Content ◽  
Obligate Anaerobic ◽  
Resistant Strains

A methodology for determining the minimum inhibitory concentration of inorganic and organomercurial compounds for obligate anaerobic bacteria is described. A wide variation in the susceptibility of anaerobic clinical and sewage isolates was observed. Isolates of Bacteroides ruminicola and Clostridium perfringens resistant to mercury were examined for their plasmid content and ability to demonstrate inducible resistance. None of the resistant anaerobes contained any plasmids, while resistant facultative isolates from the same source contained several plasmids. In 24 h, resistant strains of Clostridia and Bacteroides volatilized 20 and 43% of the 203Hg2+ added to cultures, while Escherichia coli R100 and a sewage isolate of Enterobacter cloacae volatilized 63 and 27%, respectively, of the added 203Hg2+. Attempts to induce mercury resistance in the aerobic isolates were successful, but no induction was seen in the anaerobes. Thus, mercury resistance in these anaerobic isolates was neither inducible nor plasmid mediated.

RE-SUSPENSION MECHANISM OF SEA BOTTOM SEDIMENT IN HIROSHIMA BAY

2009 ◽  
Author(s):  
Masataka Imagawa ◽  
Kyung-hoi Kim ◽  
Tadashi Hibino ◽  
Katusaki Komai ◽  
Yasushi Matsunaga
Keyword(s):  
Bottom Sediment ◽  
Sea Bottom
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