228Ra and 226Ra in coastal seawater samples from the Ubatuba region: Brazilian southeastern coastal region

The dual objectives of this study are to: (1) examine the relationship between COD and BOD in seawater environment with a rapid but reliable method for the measurement of BOD in seawater, and (2) establish the relationship model between BOD5 and COD in the firth of Dongbao River to predict the values of BOD5. The first objective is met by the successful development of a technique utilizing bacteria-immobilized membrane flow cell for biodegradation process, coupled with fibre optic fluorescence detection for oxygen depletion quantitation. The technique has been applied to coastal seawater samples collected in the coastal area of Shenzhen, China. The BOD5 and COD values for the samples are acquired and the results show that there is no apparent linear relationship existing between BOD5 and COD in relatively clean seawater samples away from the shore. However, in estuary water samples containing relatively high concentration of sewage contamination, a linear correlation does exist between BOD5 and COD. The linear relationship between the two parameters allows for the calculation of BOD5 values based on COD data which can be measured more readily and precisely.

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Catenovulum agarivorans gen. nov., sp. nov., a peritrichously flagellated, chain-forming, agar-hydrolysing gammaproteobacterium from seawater

INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY ◽

10.1099/ijs.0.027565-0 ◽

2011 ◽

Vol 61 (12) ◽

pp. 2866-2873 ◽

Cited By ~ 25

Author(s):

Shulin Yan ◽

Min Yu ◽

Yan Wang ◽

Chen Shen ◽

Xiao-Hua Zhang

Keyword(s):

Sequence Similarity ◽

Phylogenetic Analyses ◽

Coastal Region ◽

Tween 80 ◽

Egg Yolk ◽

The Yellow Sea ◽

Rrna Gene ◽

Strictly Aerobic ◽

Absolute Requirement ◽

Seawater Samples

A novel Gram-negative, strictly aerobic, agar-hydrolysing bacterium, designated YM01T, was isolated from seawater samples collected from the Yellow Sea (coastal region of Qingdao, PR China). Cells were rod-shaped, peritrichously flagellated and formed long chains end-to-end. The isolate had an absolute requirement for Na+ ions, but not seawater, for growth and grew optimally at about 28 °C, in 2 % NaCl and at pH 8.0–9.0. The isolate could not be cultured in marine broth 2216, but grew well on marine agar 2216. YM01T was able to hydrolyse cellulose, starch, aesculin and Tween 80, but not egg yolk, gelatin, urea or casein. 16S rRNA gene sequence analysis demonstrated that this isolate was unique, showing only 88.4–91.0 % sequence similarity to its closest neighbours, including members of the genera Glaciecola (88.4–91.0 %), Alteromonas (88.7–89.6 %), Aestuariibacter (89.3–90.4 %), Salinimonas (89.0 %), Bowmanella (90.1–90.3 %) and Agarivorans (88.5–89.9 %). Phylogenetic analyses demonstrated that strain YM01T formed a distinct clade closely related to species of the family Alteromonadaceae within the group of Alteromonas-like gammaproteobacteria. It contained menaquinone MK-7 as the predominant isoprenoid quinone and C16 : 0 (38.3 %), C16 : 1ω7c and/or iso-C15 : 0 2-OH (29.0 %), C18 : 1ω7c (9.3 %) and C10 : 0 3-OH (8.2 %) as major cellular fatty acids. Phosphatidylethanolamine, phosphatidylglycerol and an aminophospholipid were the major phospholipid constituents. The DNA G+C content was 44.8 mol%. Based on its phenotypic, chemotaxonomic and phylogenetic distinctiveness, strain YM01T is considered to represent a novel species in a new genus in the Gammaproteobacteria, for which the name Catenovulum agarivorans gen. nov., sp. nov. is proposed; the type strain of Catenovulum agarivorans is YM01T ( = CGMCC 1.10245T = DSM 23111T = JCM 16580T).

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Mimosine, the Allelochemical from the Leguminous Tree Leucaena leucocephala, Selectively Enhances Cell Proliferation in Dinoflagellates

Applied and Environmental Microbiology ◽

10.1128/aem.68.10.5160-5163.2002 ◽

2002 ◽

Vol 68 (10) ◽

pp. 5160-5163 ◽

Cited By ~ 11

Author(s):

Patrick K. K. Yeung ◽

Francis T. W. Wong ◽

Joseph T. Y. Wong

Keyword(s):

Cell Proliferation ◽

Leucaena Leucocephala ◽

Leguminous Tree ◽

Coastal Seawater ◽

Seawater Samples

ABSTRACT Mimosine, the allelochemical from the leguminous tree Leucaena leucocephala, is toxic to most terrestrial animals and plants. We report here that while mimosine inhibits major phytoplankton groups, it enhances cell proliferation in dinoflagellates. On addition to coastal seawater samples, mimosine is able to confer a growth advantage to dinoflagellates. The use of mimosine will promote the isolation and culture of this group of phytoplankton.

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Elemental composition of the colloidal phase isolated by cross-flow filtration from coastal seawater samples

Marine Chemistry ◽

10.1016/s0304-4203(96)00056-4 ◽

1996 ◽

Vol 55 (1-2) ◽

pp. 189-204 ◽

Cited By ~ 14

Author(s):

K.K. Bertine ◽

R. VernonClark

Keyword(s):

Elemental Composition ◽

Cross Flow ◽

Coastal Seawater ◽

Cross Flow Filtration ◽

Flow Filtration ◽

Seawater Samples

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Green Filtration of Total Solids from Various Water Sources Using Coconut Coir and Loofah

Environmental Protection Research ◽

10.37256/epr.112021847 ◽

2021 ◽

pp. 14-19

Author(s):

Adedeji A. Adelodun

Keyword(s):

Water Samples ◽

Sea Water ◽

Coastal Region ◽

Volume Ratio ◽

Water Sources ◽

Water Volume ◽

Total Solids ◽

Sorption Efficiency ◽

Coconut Coir ◽

Seawater Samples

In this study, environmentally benign and readily available organic waste materials (coconut coir and loofah) were used as biofilters to remove total solids (TS) in water samples from various sources in Araromi Coastal Region of Ilaje Local Government, Nigeria. The TS levels observed in the river, pond, well, borehole, and seawater samples were 4,000, 1,610, 3,980, 2,600, and 34,800 mg/L, respectively. Generally, the organic filters reduced the TS in the water samples. Also, the sorption efficiency increased with the filter mass-to-water volume ratio. The overall performance of coconut coir was better than loofah, probably because the former has a more closely packed fibrous mesh. The optimum sorption efficiency of 60 g of the coconut coir filter for river, pond, well, borehole, and sea water was 50%, 78%, 80%, 92.3%, and 48.8%, while those for loofah were 42.5%, 56.3%, 70%, 84.6%, and 40.2%, respectively. This work showed that pretreated coconut coir is an efficient green filter for TS in water sources, especially boreholes, wells, and ponds.

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Archaeal, bacterial, and eukaryal microbial community structure of sediment and seawater in a coastal region near Puerto Nuevo, Baja California

10.1101/324442 ◽

2018 ◽

Author(s):

Sabah Ul-Hasan ◽

Robert M. Bowers ◽

Andrea Figueroa-Montiel ◽

Alexei F. Licea-Navarro ◽

J. Michael Beman ◽

...

Keyword(s):

Community Structure ◽

Microbial Community ◽

Microbial Communities ◽

Microbial Community Structure ◽

Baja California ◽

Coastal Region ◽

Coastal Ecosystems ◽

Rrna Gene ◽

Microbial Biodiversity ◽

Seawater Samples

AbstractMicrobial communities control numerous biogeochemical processes critical for ecosystem function and health, particularly in coastal ecosystems. However, comparatively little is known about microbial community structure in coastal regions, such that basic patterns of microbial biodiversity, such as species richness and community composition, are generally understudied. To better understand the global patterns of microbial biodiversity in coastal ecosystems, we characterized sediment and seawater microbial communities for three sites near Puerto Nuevo (Baja California, Mexico) using 16S and 18S rRNA gene amplicon sequencing methods. We found that sediment bacteria, archaea, and eukaryote microbial communities contained approximately 5 × 10^2 fold greater operational taxonomic units (OTUs) than their seawater-based counterparts (p < 0.001). Further, distinct bacterial, archaeal and eukaryal phyla were found in sediment and seawater samples. The phyla Acidobacteria, Chlorobi, and Chloroflexi were found to be abundant and unique to the sediment and Cyanobacteria, Spirochaetae, and Woesearchaeota to the seawater environment. Apicomplexa and Arthropoda were abundant eukaryal phyla found uniquely in the sediment whereas the Cryptomonadales and Protalveolata were detected only in the seawater. Furthermore, bacterial and archaeal communities were statistically different by site (p < 0.05) in both seawater and sediment samples for the Major Outlet site, the site closest to a residential area. In contrast, eukaryal microbial communities were only different among sites in the seawater samples. Overall, these results suggest that our understanding of coastal microbial biodiversity patterns require spatially robust sampling. This study contributes to a growing body of foundational microbial biodiversity and ecology knowledge, providing context to the global change that is induced by urban development.

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EXTRACTION OF RADIUM ISOTOPES FROM SOME COASTAL SEAWATER SAMPLES IN EGYPT METHOD VALIDATION

Al-Azhar Bulletin of Science ◽

10.21608/absb.2014.23796 ◽

2014 ◽

Vol 25 (Issue 2-A) ◽

pp. 23-30

Author(s):

Heba Abd El-Ghaffar ◽

Wafaa Bakr ◽

Rabab Abou Shahba

Keyword(s):

Method Validation ◽

Radium Isotopes ◽

Coastal Seawater ◽

Seawater Samples

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