Glos­sary

With all the tech­ni­cal jar­gon be­ing tossed about, we’ve come up with a lit­tle guide so you can nav­i­gate our is­sue with ease

Asian Diver (English) - - Contents -

1. BOM­MIES: A plu­ral form of bom­mie – an Aus­tralian word. Short for bomb­ora, an Aus­tralian Aboriginal word for a shal­low, iso­lated piece of co­ral reef lo­cated a dis­tance off­shore.

2. BCDS: Buoy­ancy com­pen­sator de­vices, or BCDs (also called a buoy­ancy con­trol de­vice, sta­bil­isor, stab jacket, wing or ABLJ) are im­por­tant types of div­ing gear with an in­flat­able blad­der that is worn by divers to main­tain neu­tral buoy­ancy while ex­plor­ing be­neath the wa­ter’s sur­face and pos­i­tive buoy­ancy while on the sur­face, when needed. The buoy­ancy is con­trolled by ad­just­ing the vol­ume of air in the blad­der.

3. SIDE­MOUNT: Side­mount is a scuba div­ing equip­ment con­fig­u­ra­tion which has scuba sets mounted along­side the diver, be­low the shoul­ders and along the hips, in­stead of on the back of the diver. It orig­i­nated as a con­fig­u­ra­tion for ad­vanced cave div­ing, as it fa­cil­i­tates pen­e­tra­tion of tight sec­tions of caves, al­low­ing easy ac­cess to cylin­der valves and pro­vid­ing easy and re­li­able gas re­dun­dancy while be­ing eas­ily re­moved when nec­es­sary.

4. ELU­ATES: In an­a­lyt­i­cal and or­ganic chem­istry, the process of ex­tract­ing one ma­te­rial from an­other by wash­ing with a sol­vent, such as the wash­ing of loaded ion-ex­change resins to re­move cap­tured ions, is called elu­tion. The so­lu­tion of the sol­vent and dis­solved mat­ter re­sult­ing from the elu­tion is known as an elu­ate.

5. MONOMERS: A monomer is a mol­e­cule that joins with other monomers to cre­ate a larger mol­e­cule. Like a set of beads de­signed to in­ter­lock to­gether, each in­di­vid­ual bead is an item on its own but can also snap to­gether with an­other bead to form some­thing en­tirely dif­fer­ent. The term “monomer” is Greek: Mono means “one” while meros means “part”. Put to­gether, they form “one part”.

6. POLY­MER: A Greek­term, where poly means “many” while meros means “part”. Poly­mers can be made out of thou­sands of monomers. This link­ing up of monomers is called poly­meri­sa­tion. A poly­mer is a sub­stance that has a molec­u­lar struc­ture built up chiefly or com­pletely from a large num­ber of sim­i­lar units bonded to­gether, e.g., many syn­thetic or­ganic ma­te­ri­als such as plas­tics and resins.

7. VUL­CAN­I­SA­TION: Vul­can­i­sa­tion is a chem­i­cal process for con­vert­ing poly­mers into more durable ma­te­ri­als by in­tro­duc­ing cross-links. A cross-link is a bond that links one poly­mer chain to an­other and may take the form of co­va­lent or ionic bonds. By form­ing cross-links (bridges) be­tween in­di­vid­ual poly­mer chains, vul­can­i­sa­tion dra­mat­i­cally af­fects the me­chan­i­cal prop­er­ties of a poly­mer.

8. BEN­THIC OR­GAN­ISMS: Ben­thic or­gan­isms, or ben­thos, are or­gan­isms that live in and on the bot­tom of the ocean floor and in­clude worms, clams, crabs, lob­sters, sponges, mus­sels and other tiny or­gan­isms. Ben­thos is di­vided into two groups, fil­ter feed­ers and de­posit feed­ers. Fil­ter feed­ers, such as clams, mus­sels and qua­hogs, fil­ter their food by si­phon­ing par­ti­cles out of the wa­ter. De­posit feed­ers, such as snails and shrimp, in­gest or sift through the sed­i­ment and con­sume or­ganic mat­ter within it.

9. BI-VALVES: Bi­valvia, in pre­vi­ous cen­turies re­ferred to as Lamel­li­branchi­ata and Pele­cy­poda, is a class of ma­rine and fresh­wa­ter mol­luscs that have lat­er­ally com­pressed bod­ies a en­closed by a shell con­sist­ing of two hinged parts. Bi­valves as a group have no head and they lack some usual mol­lus­can or­gans like the radula and the odon­tophore. They in­clude clams, oys­ters, cock­les, mus­sels, scal­lops and nu­mer­ous other fam­i­lies that live in salt­wa­ter.

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