Dictionary » S » Shelf

Shelf

shelf

Origin: OE. Shelfe, schelfe, AS. Scylfe; akin to G. Schelfe, Icel. Skjalf. In senses 2 & 3, perhaps a different word (cf. Shelve,).

1. A flat tablet or ledge of any material set horizontally at a distance from the floor, to hold objects of use or ornament.

2. A sand bank in the sea, or a rock, or ledge of rocks, rendering the water shallow, and dangerous to ships. On the tawny sands and shelves. (milton) On the secret shelves with fury cast. (Dryden)

3. (Science: chemical) A stratum lying in a very even manner; a flat, projecting layer of rock.

4. A piece of timber running the whole length of a vessel inside the timberheads. To lay on the shelf, to lay aside as unnecessary or useless; to dismiss; to discard.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Morgellons chemistry question

Harrison: Funny the shelf-life of a simple message board post! I realize that it's over 4 years later... but I'm curious if you ever found the answer(s) to this? I just recently came across the red wind/peroxide test and was surprised ...

See entire post
by gustyplex
Sun Dec 15, 2013 9:50 pm
 
Forum: Human Biology
Topic: Morgellons chemistry question
Replies: 7
Views: 7942

Re: Digestion

... These chemicals may not all be boiled away, and some may actually be concentrated by the boiling. A local gardening store will probably have a shelf of these kinds of agents, and you could read the cautions and ingredients on a few labels to see what I mean. Wild grasses might contain some ...

See entire post
by Wallyanna
Wed May 09, 2012 8:51 am
 
Forum: General Discussion
Topic: Digestion
Replies: 4
Views: 3183

Re: What is the positive control and negative control?

... bacterial titer would best indicate a greater level of carbohydrate at some time in the past. But the number of bacteria would be secondary if shelf life is only a fnction of pH - though some lactic acid bacteria do produce bacteriocins..

See entire post
by JorgeLobo
Mon Feb 27, 2012 1:51 pm
 
Forum: Microbiology
Topic: What is the positive control and negative control?
Replies: 9
Views: 4445

Re: What is the positive control and negative control?

Can you elaborate on why the level of lactic acid bacteria determies shelf life? I've read that pH is a primary determinant as maintenance of a low pH inhibits growth of potential spoilage bacteria and that pH is established and mainained by the lactic bacteria ...

See entire post
by JorgeLobo
Sun Feb 26, 2012 5:10 pm
 
Forum: Microbiology
Topic: What is the positive control and negative control?
Replies: 9
Views: 4445

What is the positive control and negative control?

I'm looking at whether the sugar content affects the shelf life in yoghurt. I will count the number of lactic acid bacteria in each sample. The more lactic acid bacteria, the longer the shelf life. My hypothesis is that the higher the sugar yoghurt, ...

See entire post
by ilovebiology77
Sun Feb 26, 2012 3:44 pm
 
Forum: Microbiology
Topic: What is the positive control and negative control?
Replies: 9
Views: 4445
View all matching forum results

This page was last modified 21:16, 3 October 2005. This page has been accessed 2,196 times. 
What links here | Related changes | Permanent link