Keyword BOOLEAN

The result of a logical expression is either True or False (these are two VBA keywords ). Boolean expressions are composed of comparative sub-expressions and/ or logical operators. Comparative operators are <, <=,>,>=,=,<> and the logical operators are And, Or, and Not (these are VBA keywords). Here are a few examples ... 

The initial step is to identify which database, from a few thousands worldwide (about 10 000 in 2002), provides the requested information. The next step is to determine which subsection of the topic is of interest, and to identify typical search terms or keywords (synonyms, homonyms, different languages, or abbreviations) (Table 5-1). During the search in a database, this strategy is then executed (money is charged for spending time on some chemical databases). The resulting hits may be further refined by combining keywords or database fields, respectively, with Boolean operators (Table 5-2). The final results should be saved in electronic or printed form. 

Searching is fast and easy. Along with a simple keyword search, IPN offers alternative searches by patent number, boolean text, and advanced text that allows for multiple field searching. Browsing provides an organized approach to searching for patents. Through a review of specific classifications, you can identify topics and patents of interest. 

The various chemical requirements of each derivative group are summarized in Table 8.1. In order to implement these requirements, a component specification language has been developed. This specification language contains a combination of keywords, target values, and Boolean operators. A brief summary of these commands is listed in Table 8.2 below. The specification language allows the user to control... 

If a keyword consists of a phrase which contains a word identical to a Boolean operator, this word must be changed (e.g., AID can be substituted for AND). This is important to remember when using the terms describing biological end points as listed in Table 3. A search for craniofacial defects resulting from dichlorvos exposure can be worded ETIC AND 62-73-7 AND CRANIUM AID FACE (KW). 

PubMed is one of the most valuable web resources for biochemical literatures accessible from Entrez (http //www.ncbi.nlm.nih.gov/entrez/). Many well-regarded journals in biochemistry, molecular biology and related fields as well as clinical publications of interest to medical professionals are indexed in PubMed. The resource can be searched by a keyword with its boolean operators (AND, OR and NOT). Users can specify the database field to search. The Preview/Index menu allows the user to build a detailed query interactively. 

EMBL Nucleotide Sequence Database. SWISS-PROT consists of core sequence data with minimal redundancy, citation and extensive annotations including protein function, post-translational modifications, domain sites, protein structural information, diseases associated with protein deficiencies and variants. SWISS-PROT and TrEMBL are available at EBI site, http //www.ebi.ac.uk/swissprot/, and ExPASy site, http //www.expasy.ch/sprot/. From the SWISS-PROT and TrEMBL page of ExPASy site, click Full text search (under Access to SWISS-PROT and TrEMBL) to open the search page (Figure 11.3). Enter the keyword string (use Boolean expression if required), check SWISS-PROT box, and click the Submit button. Select the desired entry from the returned list to view the annotated sequence data in Swiss-Prot format. An output in the fasta format can be requested. Links to BLAST, feature table, some ExPASy proteomic tools (e.g., Compute pI/Mw, ProtParam, ProfileScan, ProtScale, PeptideMass, ScanProsite), and structure (SWISS-MODEL) are provided on the page. 

Substructure and keyword searches including bioactivity, potency and selectivity data, structure-activity relationships, pattern recognition, Boolean searches, and modeling... 

Data import into CDD is currently a simple four-step process from a. csv or. sdf and mapping a dataset to a user-defined protocol if required. Data can be readily mined in CDD and in addition the user can specify which private vaults and public datasets to use (Fig. 2). A full Boolean search is possible by specifying protocol, run, readout, chemical properties, keywords, etc. If molecules are selected, CDD also provides a link to find more information in external databases such as ChemSpider. Data in CDD can also be plotted graphically using an interactive visualization that also provides a snapshot of the molecule and data upon mousing over an X, Tcoordinate. This may allow a simple SAR analysis. 

OTHER KEYWORDS AND OPERATORS False Boolean ke)rword. 

Use the keywords True or False to assign the value True or False to Boolean (logical) variables. 

As you search your electronic sources, remember that you may have to try a variety of keywords (and their synonyms) to find what you need. Sometimes your keyword search may turn up too few leads—and sometimes you may be overwhelmed with too many matches (For example, when Amy Lawrence typed in the keyword Anastasia, she discovered too many irrelevant entries focusing on Hollywood movies about the princess.) To save time and effort, you may be able to broaden or narrow your search by typing in words called Boolean operators as illustrated below ... 

Boolean Fields. These fields store the presence (or absence) of a keyword or a parameter. 

By searching for numerical terms (physical data, keywords or Boolean terms, such as the existence of spectra, etc.). These terms can be searched separately or in Boolean combinations ( AND , OR , NOT ). 

A Boolean condition is defined using the keyword Condition, followed by a Boolean expression ... 

Keywords Information theory Mutual information Information integration Dynamical cluster index Dynamical system Boolean networks... 

---