Chemistry essay代写:软体动物

2017-02-11 15:36

软体动物可以几乎无处不在的土地和它的栖息地发现，包括珊瑚礁、河口、湖泊和河流。它的栖息地，从沙漠到热带雨林（2003 lydeard &林德伯格）。软体动物也被确定为一个重要的渔业和海水养殖业的食物如蛤，扇贝，鲍鱼，海螺珍珠而不是商业生产（兰德曼等人，2001）。 Babylonia areolata，象牙壳分为家庭Buccinidae的腹足类（hualkasin et al.，2008）。B方可以很容易地被它的颜色模式，因为它是以三分排黑斑属的唯一成员（阿尔特纳et al.，1981）。这三个相隔排点在体螺层可见，使这一物种容易识别（阿尔特纳et al.，1981）。它可以10-20M深沙底发现（有1997）。 B方有总高度约半孔径buccinoid壳。从上部看不到缺口，因为开口的外唇内部没有明显增厚。在唇内的最后一轮，由一个强大的愈伤组织的缺口可以看到脐。肚脐是敞开的，最初的轮生白色遵循下列轮生在白色背景上的红色的斑点（阿尔特纳et al.，1981）。发现巴比伦，B方也称为内湾在泰国支持商业渔业（chaitanawisuti和kritsanapuntu，1999）。这个物种可以在泰国湾发现三种不同的外壳颜色，棕色，奶油和白色。不同的外壳颜色表示不同的值。棕色的外壳的最高价格而白壳具有最低的价格（hualkasin et al.，2008）。对褐壳B方高需求是从中国、台湾、香港和日本。在泰国，对b.areolata分布在泰国上、下湾不同。碧武里，罗勇位于泰国湾上只有褐壳B方在宋卡和北大年，所有三种颜色都没有发现（hualkasin et al.，2008）。 B方是一个著名的和有营养的食物已被用于重金属的毒性和生物毒素的传播研究软体动物模型（Chen &周杰伦流行，1998）。作为B方也在马来西亚进行实验，研究其重金属含量和浓度在泰国的潜在市场。选择的样品B方图的地方是在巴卓，吉兰丹。

Chemistry essay代写:软体动物

Mollusks can be found almost everywhere on land and its habitat was including coral reef, estuaries, freshwater lakes and also rivers. Its habitat ranging from deserts to rainforests (Lydeard & Lindberg, 2003). Mollusks also had been identified as an important fisheries and mariculture food such as clams, scallops, abalone and conch instead of commercial pearl production (Landman et al., 2001).

Babylonia areolata, ivory shell was categorized as a gastropod in family Buccinidae (Hualkasin et al., 2008). B. areolata can easily be recognized by its colour-pattern because it was the only member of the genus with three broadly separated rows of dark spots (Altena et al., 1981). This three widely separated rows of spots are visible on the body-whorl, enabling easy identification of this species (Altena et al.,1981). It can be found 10-20m deep in sandy bottom (Habe, 1997).

B. areolata has a buccinoid shell with the aperture approximately half of the total height. There are no notch can be seen from the upper part as the outer lip of the aperture not clearly thickened inside. On the last whorl in the inner lip, a notch consisting of a strong callus can be seen for the umbilicus. The umbilicus is wide open and the initial whorls whitish follows by the reddish-brown spots on a white background for the following whorls (Altena et al., 1981).

The spotted babylon, B. areolata which also known as the Hoy Wan in Thailand supports a commercial fishery (Chaitanawisuti & Kritsanapuntu, 1999). This species can be found in the Gulf of Thailand by three different shell colors which are brown, cream and white. The different shell colors indicate different values. The brown shell has the highest price while the white shell has the lowest price (Hualkasin et al., 2008).

High demand for the brown shell B. areolata was from China, Taiwan, Hong kong and Japan. In Thailand, the distribution of B.areolata was different at the upper and lower Gulf of Thailand. Phetchaburi and Rayong which located at the upper gulf of Thailand only have brown shells B. areolata while in Songkhla and Pattani, all three colors are found there (Hualkasin et al., 2008).

B. areolata is a well-known and nutritious food which have been a popular mollusk model used for the study of heavy-metal toxicity and biologic poisoning toxins transmission (Chen & Chou, 1998). As the B. areolata has a potential market in Thailand as well as in Malaysia it will be used in this experiment to study its heavy metal contents and concentration. The place chosen for the sample drawing of B. areolata is in Bachok, Kelantan.