• Some substances, especially ionic compounds such as common salt, are not made up of molecules and thus have neither a molecular formula nor a molecular weight. (encyclopedia.com)
  • thus a comparison of the weights of equal volumes of different gases under the same conditions of temperature and pressure is equivalent to a direct comparison of the weights of molecules of the gases. (encyclopedia.com)
  • However, if the substance ionizes or does not completely separate into molecules, the molecular weight so determined will be erroneous. (encyclopedia.com)
  • The methods may give different results, since usually the molecules of a substance such as a polymer do not all have exactly the same molecular weight. (encyclopedia.com)
  • These methods determine an average molecular weight for the molecules in the sample. (encyclopedia.com)
  • The number-average molecular weight determined by the ultracentrifuge method gives a value that is equal to the weight of the sample divided by the number of molecules in the sample. (encyclopedia.com)
  • Although this may be the same value as the number-average molecular weight if all the molecules have nearly the same weight, it will be higher if some of the molecules are heavier than others. (encyclopedia.com)
  • For instance, if one component had a molecular weight of 50 and another had a molecular weight of 100, then the molecules in the second compound would weigh twice as much as those in the first compound. (wisegeek.com)
  • If they were both combined in equal grams, the lower weight compound would have twice as many molecules present in the mixture, since they only weighed half as much, and, instead of a 50/50 concentration, there would be a concentration of approximately 66/33. (wisegeek.com)
  • Avogadro's number , which represents how many molecules exist in a mole, must also be used when determining a peptide's volume from the peptide molecular weight. (wisegeek.com)
  • Hyaluronan signaling properties are unique among other biologically active molecules, that they are apparently not influenced by postsynthetic molecular modification, but by hyaluronan fragment size. (hindawi.com)
  • Different papers use interchangeably terms such as "short-fragment HA," "low molecular weight HA," and "HA oligosaccharides" to describe HA molecules from a few disaccharides up to over 700 kDa. (hindawi.com)
  • Einstein's equation E = mc 2 equates a change in energy to a change in mass, but when this number is very small (on the scale of 10-9), we suffer no large error from adding the molecular masses of isotopes together to get the molecular mass of the molecules they make when combined through these weak electrical forces. (calculator.org)
  • When using mass spectrometry on larger molecules, chemists will use the average molecular mass of its isotopes because the likelihood that one is dealing with many different kinds of isotopic mixes is higher. (calculator.org)
  • The ultimate aim of creating such molecular-scale devices is to use them as switching units or logic gates in a future computer based on molecules instead of silicon chips. (theengineer.co.uk)
  • The team has succeeded in applying a layer just a few molecules thick of a particular molecular machine to a glass surface. (theengineer.co.uk)
  • 1.2 The molecular-weight range for light scattering is, to some extent, determined by the size of the dissolved polymer molecules and the refractive indices of solvent and polymer. (astm.org)
  • Distribution of molecular weight (MW) (a), log P (b), H-bond acceptors (c), and H-bond donors (d) values in the set of actives ( ) and decoy molecules ( ) used in the enrichment studies. (zanran.com)
  • one gram molecular weight of a molecular substance contains one mole of molecules. (thefreedictionary.com)
  • Identification and determination of molecular weight of allergenic bands by comparison with Allergen database: An allergen database (www.allergen.org) contains approved and officially recognized allergens. (thefreedictionary.com)
  • Analytic techniques for the determination of molecular weight can be broken down into primary and secondary techniques based on whether or not standards are needed to calibrate the analytic instrument. (uc.edu)
  • An absolute determination of molecular weight for a single sample using light scattering, for example, might take the better part of a week including sample preparation, filtration, running the experiment and preparation of Zimm plots. (uc.edu)
  • Bioline offers a wide range of molecular weight markers with loading buffer in a single tube, enabling accurate DNA sizing and mass determination of DNA. (bioline.com)
  • In this study, 2017 has been considered as the base year and 2018 to 2025 as the forecast period to estimate the market size for Medium Molecular Weight Polyisobutylene. (qyresearchreports.com)
  • Rate of clearance from body is inversely proportional to molecular weight. (slideserve.com)
  • This report researches the worldwide Medium Molecular Weight Polyisobutylene market size (value, capacity, production and consumption) in key regions like North America, Europe, Asia Pacific (China, Japan) and other regions. (qyresearchreports.com)
  • 8. The process of claim 7 wherein the reaction solvent comprises 100 percent, by weight, benzyl alcohol. (freepatentsonline.com)
  • b) withdrawing from said reaction zone a higher molecular weight hydrocarbon-containing stream, wherein the carbon-containing reaction products in said stream comprises greater than 90 mole percent higher molecular weight hydrocarbons. (google.com)
  • 1. A drug delivery composition which is suitable for transmucosal delivery and which comprises a plurality of microspheres adapted to gel in contact with the mucosal surface and active drug associated with each microsphere, the composition being substantially free of an enhancer, characterised in that the drug is for systemic delivery and is a peptide having a maximum molecular weight of 6000, and the microspheres comprise starch, gelatin, collagen or dextran. (google.es)
  • High Molecular Weight Poly(I:C) comprises long strands of inosine poly(I) homopolymer annealed to strands of cytidine poly(C) homopolymer. (invivogen.com)
  • The peptide molecular weight can also be described as one mole of the peptide in grams, as a mole is a quantity of the peptide that is equal to its molecular weight. (wisegeek.com)
  • Therefore, since the amino acid weight of proline, for instance, is 97.12, one mole of proline is equal to 97.12 grams of the substance. (wisegeek.com)
  • The molecular weight of argon is 39.9 grams/mole. (reference.com)
  • Glycine has a molecular weight of slightly over 75 grams/mole. (reference.com)
  • The molecular weight of HCl, or hydrochloric acid, is 36.46 grams per mole. (reference.com)
  • When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. (convertunits.com)
  • 792.56 grams per cubic meter is right for an ideal gas with a molecular weight of 18. (physicsforums.com)
  • I sanity-checked your computation by taking 1200 grams per cubic meter (density of air, according to Google) and multiplying by 18/28 (air is mostly nitrogen with a molecular weight of 28). (physicsforums.com)
  • It has ultra-high molecular weight and extreme rheological behaviour, which make it a worldwide challenge to process UHMWPE continuously with little or without processing aids. (intechopen.com)
  • Molecular weights of substances may be determined experimentally in various ways, the method employed usually depending on the state (solid, liquid, or gas) of the substance. (encyclopedia.com)
  • We doesn't provide chloride molecular weight products or service, please contact them directly and verify their companies info carefully. (chinacsw.com)
  • Zinc sulphate monohydrate Molecular formulation:ZnSO4H2O Specifications: Item Index ZnSO4H2O 94.7 % min Zn 34.5 %min As 5 ppm max Pb 20ppm max Cd 30ppm max Fineness passed 250 mesh sieve 95.0 %max Applicatio. (burrillandco.com)
  • This review focuses on the participation of small molecular weight redox compounds in oxidative protein folding. (mdpi.com)
  • A drug delivery composition comprising a plurality of microspheres and active drug associated with each microsphere, the drug being for systemic delivery and having a maximum molecular weight of 6000, and the composition being substantially free of an enhancer. (google.es)
  • Mean molecular weight of 4000 - 6000 IU. (slideserve.com)
  • What Is Peptide Molecular Weight? (wisegeek.com)
  • It is important to know peptide molecular weight numbers in processes such as peptide synthesis, as the weight can be used to determine the concentration of molecular components. (wisegeek.com)
  • Molecular weight analyzer software is often used to calculate peptide molecular weight numbers, as the calculations can be complicated otherwise. (wisegeek.com)
  • When two or more amino acids are combined, a peptide molecular weight calculator is often used to determine the new molecular weight. (wisegeek.com)
  • Determining an accurate peptide molecular weight has important applications in a variety of research. (wisegeek.com)
  • Identification and characterization of neuroendocrine pathways involved in the regulation of seasonal body weight cycles von: Khorooshi, Mohammad H. (uni-marburg.de)
  • How to Calculate the Molecular Weight of a Chemical Compound? (syvum.com)
  • The elevated temperatures associated with melt processing, combined with the time that the material spends in the barrel, can have a significant effect on the molecular weight of the compound. (ptonline.com)
  • The molecular weight of water is thus (2×1.008)+(1×15.999)=2.016+15.999=18.015 amu. (encyclopedia.com)
  • Not only are there a variety of chemical element molecular weights to account for in amino acid sequences that make up peptides, but there are also other factors to consider. (wisegeek.com)
  • It is difficult, using known methods, to control the molecular weight of the product of despolimerizaci6n. (google.com)