X Lossless Decoder (XLD) is a tool for Mac OS X that is able to decode/convert/play various 'lossless' audio files. The supported audio files can be split into some tracks with cue sheet when decoding. It works on Mac OS X 10.3 and later.
Here’s another vote for XLD. It’s very flexible, converting between FLAC and MP3, AAC, Apple Lossless, WAV & AIFF and more. There’s a bit of a learning curve, but you can find easy tutorials online. XACT is similar, and can sometimes work with files that XLD won’t convert for whatever reason (i run into this problem sometimes). Unofficial XLD Configuration Guide for Beginners. Download the app at MacUpdate or the developer's website. First ensure that you're using the latest version of XLD and check for updates. (You can check this as indicated in the second illustration under 'General' Preferences.
(XLD agar) is a selectivegrowth medium used in the isolation of Salmonella and Shigella species from clinical samples and from food.[1][2] It has a pH of approximately 7.4, leaving it with a bright pink or red appearance due to the indicator phenol red. Sugar fermentation lowers the pH and the phenol red indicator registers this by changing to yellow. Most gut bacteria, including Salmonella, can ferment the sugar xylose to produce acid; Shigella colonies cannot do this and therefore remain red. After exhausting the xylose supply Salmonella colonies will decarboxylate lysine, increasing the pH once again to alkaline and mimicking the red Shigella Adobe acrobat version. colonies. Salmonellae metabolise thiosulfate to produce hydrogen sulfide, which leads to the formation of colonies with black centers and allows them to be differentiated from the similarly coloured Shigella colonies.
Other Enterobacteria such as E. coli will ferment the lactose present in the medium to an extent that will prevent pH reversion by decarboxylation and acidify the medium turning it yellow.
- Salmonella species: red colonies, some with black centers. The agar itself will turn red due to the presence of Salmonella type colonies.
- Shigella species: red colonies.
- Coliforms: yellow to orange colonies.
- Pseudomonas aeruginosa: pink, flat, rough colonies. This type of colony can be easily mistaken for Salmonella due to the color similarities.
Dev c printf was not declared. XLD agar contains:
Xld
| Yeast extract | 3g/l |
| L-Lysine | 5g/l |
| Xylose | 3.75g/l |
| Lactose | 7.5g/l |
| Sucrose | 7.5g/l |
| Sodium deoxycholate | 1g/l |
| Sodium chloride | 5g/l |
| Sodium thiosulfate | 6.8g/l |
| 0.8g/l | |
| Phenol red | 0.08g/l |
| Agar | 12.5g/l |
See also[edit]
References[edit]
Download Xld For Mac
- ^Zajc-Satler J, Gragas AZ (1977). 'Xylose lysine deoxycholate agar for the isolation of Salmonella and Shigella from clinical specimens'. Zentralbl Bakteriol [Orig A]. 237 (2–3): 196–200. PMID848209.
- ^Nye KJ, Fallon D, Frodsham D, et al. (April 2002). 'An evaluation of the performance of XLD, DCA, MLCB, and ABC agars as direct plating media for the isolation of Salmonella enterica from faeces'. J. Clin. Pathol. 55 (4): 286–8. doi:10.1136/jcp.55.4.286. PMC1769632. PMID11919214.