Four-digit numbers

This line indicates that the job is currently executing Link 301. All versions of Gaussian are divided into approximately 75 modules known as links, having names of the form Lnnn where nnn is a one to four digit number. As you gain experience, many of these links will become familiar to you. 

Fluorinated compounds are frequently referred lo by code, such as F-l 15. To translate this code into a molecular formula, add 90 to 115. The firsl digit of the sum is the number of carbons the second, the number of hydrogens the third, the number ol fluorines chlorines complete the valences (i.e., C2F5CI is F-l 15 = 90 + 115 = 205. or C H Fj). A four-digit number is used for unsaturated molecules. See Tables 14.1-14.3 for the numbering system for chlorofluorocarbons. 

DOT Identification Numbers Four-digit numbers proceeded by UN (United Nations) or NA (North American) that are used to identify the particular hazardous materials for regulation of transportation (e.g., the UN code number for chlorine trifluoride is UN1749). Haz Mat Response Teams (HMRTs) often refer to such numbers to identify specific chemicals listed in the Department of Transportation s Emergency Response Guidebook Double Gloving An additional set of gloves worn in addition to the already in-place protection. 

United Nations/North American Identification Number(s) UN/NA identification numbers are four-digit numbers assigned to identify and cross-reference a hazardous materials (i.e., nitric acid, fuming = 2032 butane = 1011 white phosphorus, dry = 1381). 

A study using 50 rats of each sex in each of five groups (two controls and three increasing doses) measured body weight and food and liquid consumption every week or month for two years. This resulted in 3 variables x 2 sexes x 5 groups x 53 times x 50 animals. Means alone constituted some 1600 four-digit numbers. 

Each enzyme has been given a four-digit number by the Enzyme Commission of the International Union of Biochemistry. The first three digits relate to the reaction catalysed by the enzyme and the final one is required if several enzymes with different protein structures catalyse the same reaction. 

Committee of Experts has been allocated a unique four-digit number, called the Substance UN Number (or simply the UN Number). Thus a hazardous substance can be distinctly identified by the Substance UN Number (also called the Substance Identification Number or SIN). UN Serial number 0001 to 1000 are reserved for Class 1 items, that is, explosives and ammunition. The nine classes of dangerous goods and hazardous chemicals with a distinctive diamond shaped label bearing a pictorial diagram for quick hazard recognition are ... 

X-Explosives from LASL. The Los Alamos National Sdentific Laboratory (LASL) symbols for research expls carry the designation X followed by a four-digit number. Tables 1 and 2 (from Ref 1) list a.chemical description and densities and melting points, respectively, of typical formulations... 

The log tables of this book show only three digits for N. If you want the log of a four-digit number, you must estimate the mantissa from the two closest values in the table. This process is called interpolation. For example, to find the log of 2032, you would proceed as follows. 

Individual enzymes are assigned a four-digit number, a systematic name, and a trivial name more commonly used by biochemists. For example, EC (Enzyme Commission) 2.7.1.2 denotes a transferase (major class 2) and indicates that a phosphate group is transferred (subclass 7) and that an alcohol group accepts the phosphate (sub-subclass 1). The final digit denotes that the enzyme is ATP D-glucose-6-phosphotransferase (glucokinase). For the most part, we will use the trivial names accepted by the IUB in our subsequent discussion of enzymes that participate in metabolic pathways. 

The following year, Andrews and Vetter introduced a system which allowed a conversion of the structure into a code with a computer program [88]. These so-called AV-codes (Andrews and Vetter codes) start with a number and a letter representing the C-backbone and the degree of chlorination which are connected to a one to four-digit number by a hyphen. The latter is the isomer-specific assignment. So far, this system is restricted to polychlorinated bornanes since the IUPAC nomenclature for camphenes and dihydrocamphenes is still not completely clarified (see Sect. 1.2). 

To bring some consistency to the classification of enzymes, in 1964 the International Union of Biochemistry established an Enzyme Commission to develop a nomenclature for enzymes. Reactions were divided into six major groups numbered 1 through 6 (Table 8.3). These groups were subdivided and further subdivided, so that a four-digit number preceded by the letters EC for Enzyme Commission could precisely identify all enzymes. 

As you ve already seen, dates and times can be entered into worksheet cells using any one of several convenient formats July 1 can be entered as 7-1, 7/1, July 1, Jul 1 or 1 July, among others. All these date entries produce the date 7/1/xxxx in the formula bar (xxxx is the four-digit year) and the displayed date 1-Jul. Excel enters the current year unless a different year is specified. If you enter the year, either as a two-digit or four-digit number. Excel displays the date in a different format, as e.g., 7/1/xx. 

Oxygenated Hydrocarbons. TM for a series of petroleum-derived oxidates composed primarily of organic acids and esters. Designated by TC or TX followed by a four-digit number, e.g., TC-5416, TC-6664. 

UN/NA Number A four digit number used by both the United Nations and the U.S. Department of Transportation. This number is assigned to a hazardous chemical or group of hazardous chemicals. 

Exception Spaces or commas are inserted in four-digit numbers when alignment is needed in a column containing numbers of five or more digits. 

Schmidt, G. Schulz, Ann. 207, 338 (1881). Commercially available since 1930 C. Penning, Ind. Eng. Chem. 22, 1180 (1930). Commercial PCBa are mixtures. The Aroclors are characterized by four digit numbers. The first two digits indicate that the mixture contains biphenyls (12), triphenyls (54) or both (25, 44) the last two digits give the weight percent of chlorine in the mixture (e.g. Aroclor 1242 contains biphenyls with approx 42% chlorine). Reviews of envi -ronmental impact and toxicity L. Fishbein, Ann. Rev. 

Batteries containing lithium are listed as miscellaneous hazardous materials. The storage batteries are composed of lithium, sulfur, selenium, tellurium, and chlorine. These batteries have four-digit UN identification numbers assigned depending on the use and composition of the battery. Lithium batteries contained in some kind of equipment have the four-digit number 3091. Batteries with liquid or solid cathodes, not in any kind of equipment, are given the number 3090. 

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