Information mask

OPUS allows you to create and modify information masks. An information mask can consist of up to 99 fields. By creating an information mask you define the kind of information you want to save in conjunction with your sample. Thus, you can create various information masks to cover all types of samples. The content and the name of the information mask will be saved together with the information you enter. 

Curent Info Mask C kQPUSDEMD vMETHODS DEFAULT.TXD 

Load Text Detirilion Restore OriginaJ Cleat All 

Line 1 Compound Name Line 2 jMolecular Formula 

Cuient Info Mask C kOPUSOEMOVMETHODS DEFAULT.TXD Load Text Definition Restore Original ClearAI 

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The wide validation context made it necessary to extend the PAQM method to include some binaural processing. Furthermore different implementations of the asymmetry effect were used and also a first attempt to model informational masking was included [Beerends et al., 1996],... 

Informational masking, where the masked threshold of a complex target masked by a complex masker may decrease after training by more than 40 dB [Leek and Watson, 1984],... 

In order to attach information to the data file you first need to create an information mask (refer to Section 7.3). To use an existing information mask for data input, load a spectrum into the Browser and select it. From the Edit menu choose Information Input and the most recently used information mask will be displayed as shown in Fig. 7.3. Note that you can only choose one spectrum file at a time to enter additional information. 

The name of the information mask used for data input is indicated in the Text Definition field. If you prefer to use another information mask click on Load Text Mask, the relevant dialog box depicted in Fig. 7.4 will appear and from this you can select a different information mask. Enter the information you want to attach to the sample file. You do not need to fill out every field. After inserting the appropriate data use the Add Information button to save it. As a result, a new data block imto will be attached to the OPUS file. Now right-click on the data block icon in the Browser and select Show Report this will open a report window that displays the information you just entered. 

Furthermore, you can use the Information Input command to edit existing information blocks. If an OPUS file already has an information block attached, it will automatically be opened by the Information Input command using the correct information mask. However, if the appropriate mask cannot be found the name of the mask will be highlighted in red. For example, the content of the information block for the MIR spectrum ACETONE is shown in Fig. 7.5. Of course you can alter the information block. Alternatively, you can select a different information mask in this case all existing information will be discarded. 

Initial evaluations of chemicals produced for screening are performed by smelling them from paper blotters. However, more information is necessary given the time and expense required to commercialize a new chemical. No matter how pleasant or desirable a potential odorant appears to be, its performance must be studied and compared with available ingredients in experimental fragrances. A material may fail to Hve up to the promise of its initial odor evaluation for a number of reasons. It is not at all uncommon to have a chemical disappear in a formulation or skew the overall odor in an undesirable way. Some materials are found to be hard to work with in that their odors stick out and caimot be blended weU. Because perfumery is an individuaHstic art, it is important to have more than one perfumer work with a material of interest and to have it tried in several different fragrance types. Aroma chemicals must be stable in use if their desirable odor properties are to reach the consumer. Therefore, testing in functional product appHcations is an important part of the evaluation process. Other properties that can be important for new aroma chemicals are substantivity on skin and cloth, and the abiHty to mask certain malodors. 

Health Hazards Information - Recommended Personal Protective Equipment Chemical safety goggles and full face shield, self-contained breathing apparatus (SCBA), positive pressure hose mask, airline mask rubber safety shoes, chemical protective clothing Symptoms Following Exposure Inhalation causes irritation of nose and throat, a feeling of pressure in the chest, and shortness of breath. Nausea... 

Health Hazards Information - Recommended Personal Protective Equipment U.S. Bu. Mines approved toxic dust mask chemical goggles rubber gloves neoprene-coated shoes Symptoms Following Erqrosure Inhalation produces slight toxic effects. Contact with eyes irritates eyes and causes skin rash General Treatment for Exposure INHALATION remove to fresh air. EYES wash with water for 20 min. call a physician. SKIN wash with water Toxicity by Inhalation (ThresholdLimit Value) Data not available Short-Term Exposure Limits Data not available Toxicity by Ingestion Grade 2 oral rat LDjq 820 mg/kg Late Toxicity Data not available Vapor (Gas) Irritant Characteristics Data not available Liquid or Solid Irritant Characteristics Data not available Odor Threshold Data not available. 

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