東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Bioavailability of trace metals to m...

Pan, Jinfen.

Linked to FindBook

Google Book

Amazon

博客來

Bioavailability of trace metals to marine bivalves mediated by dissolved and colloidal organic carbon.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Bioavailability of trace metals to marine bivalves mediated by dissolved and colloidal organic carbon./
Author:	Pan, Jinfen.
Description:	195 p.
Notes:	Source: Dissertation Abstracts International, Volume: 65-02, Section: B, page: 0633.
Contained By:	Dissertation Abstracts International65-02B.
Subject:	Environmental Sciences. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3123042

Bioavailability of trace metals to marine bivalves mediated by dissolved and colloidal organic carbon.
Pan, Jinfen.

Bioavailability of trace metals to marine bivalves mediated by dissolved and colloidal organic carbon. - 195 p.

Source: Dissertation Abstracts International, Volume: 65-02, Section: B, page: 0633.

Thesis (Ph.D.)--Hong Kong University of Science and Technology (People's Republic of China), 2004.

The significant roles of colloidal nanoparticles or macromolecules in the biogeochemical cycling of trace metals and thus the interaction between organic matter and trace metals in aquatic environments have been demonstrated recently. In this study laboratory experiments employing radiotracer methodology and ultrafiltration techniques were conducted to examine the influences of natural dissolved organic carbon (DOC) and colloidal organic carbon (COC) on the bioavailability of trace metals (Fe, Cr, Ag, Cd, and Hg in forms of inorganic and methylated) to the green mussel Perna viridis (and the clam Ruditapes philippinarum for Cr and Fe) at different concentrations of DOC and COC from different origins (estuarine, coastal, and diatom decomposed). The differential utilizations of organic carbon by the marine mussels through the assimilation of five phytoplankton diets and from the dissolved phase were also investigated. Standard compounds (glucose, amino acids arginine and leucine, and high molecular weight carbohydrate particles with size ranging from 3 to 2000 kDa) were used to study the organic matter flux into the green mussel P. viridis. The results demonstrated that natural colloid-bound metals were bioavailable to the green mussels and clams. The influences of COC on metal bioavailability were metal-specific and dependent on the geochemical properties of colloids and colloid-metal complexation.Subjects--Topical Terms:

676987
Environmental Sciences.

Bioavailability of trace metals to marine bivalves mediated by dissolved and colloidal organic carbon.
LDR:03344nmm 2200301 4500 001 1861516
005 20041117064929.5
008 130614s2004 eng d
035 $a (UnM)AAI3123042
035 $a AAI3123042
040 $a UnM $c UnM
100 1 $a Pan, Jinfen. $3 1949111
245 1 0 $a Bioavailability of trace metals to marine bivalves mediated by dissolved and colloidal organic carbon.
300 $a 195 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-02, Section: B, page: 0633.
500 $a Adviser: Wen-Xiong Wang.
502 $a Thesis (Ph.D.)--Hong Kong University of Science and Technology (People's Republic of China), 2004.
520 $a The significant roles of colloidal nanoparticles or macromolecules in the biogeochemical cycling of trace metals and thus the interaction between organic matter and trace metals in aquatic environments have been demonstrated recently. In this study laboratory experiments employing radiotracer methodology and ultrafiltration techniques were conducted to examine the influences of natural dissolved organic carbon (DOC) and colloidal organic carbon (COC) on the bioavailability of trace metals (Fe, Cr, Ag, Cd, and Hg in forms of inorganic and methylated) to the green mussel Perna viridis (and the clam Ruditapes philippinarum for Cr and Fe) at different concentrations of DOC and COC from different origins (estuarine, coastal, and diatom decomposed). The differential utilizations of organic carbon by the marine mussels through the assimilation of five phytoplankton diets and from the dissolved phase were also investigated. Standard compounds (glucose, amino acids arginine and leucine, and high molecular weight carbohydrate particles with size ranging from 3 to 2000 kDa) were used to study the organic matter flux into the green mussel P. viridis. The results demonstrated that natural colloid-bound metals were bioavailable to the green mussels and clams. The influences of COC on metal bioavailability were metal-specific and dependent on the geochemical properties of colloids and colloid-metal complexation.
520 $a Using the DOC originating from the decomposed diatom (Thalassiosira pseudonana), I demonstrated that Cd and Cr uptake increased linearly with increasing DOC concentration. While this biogenic DOC decreased the uptake of Hg(II). The bioavailability of McHg was weakly influenced by different DOC quality or quantity.
520 $a Results demonstrated the direct accumulation of biogenic DOC obtained from the diatom decomposition, and the significant utilization of COC as nutrients of the mussels, A variety of HMW dextrans (at substrate concentrations of 0.2 to 2 mg L-1) were actively ingested by the mussels.{09}A kinetic model was applied to quantitatively evaluate the carbon contribution from the dissolved and particulate sources to the general organic carbon utilization of the mussels. It appears that the mussels were able to utilize colloids of different sizes, thus playing an important role in the cycling of DOC in the coastal waters.
590 $a School code: 1223.
650 4 $a Environmental Sciences. $3 676987
650 4 $a Biogeochemistry. $3 545717
650 4 $a Biology, Oceanography. $3 783691
690 $a 0768
690 $a 0425
690 $a 0416
710 2 0 $a Hong Kong University of Science and Technology (People's Republic of China). $3 1249812
773 0 $t Dissertation Abstracts International $g 65-02B.
790 1 0 $a Wang, Wen-Xiong, $e advisor
790 $a 1223
791 $a Ph.D.
792 $a 2004
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3123042