D4001 - 13 Standard Test Method for Determination of Weight-Average Molecular Weight of Polymers By Light Scattering , light scattering, polymers, weight-average molecular weight,
In this work, we present a generalization of our previous model, which allows us to account for the entire molecular weight distribution, as well as the long-chain branching. We develop a deeper insight into the vinyl group distribution among the molecules given the operating conditions of the modification process. We focus on the modification taking place in a press at constant temperature, under conditions where scission is not measurable. II. MATHEMATICAL MODEL We develop a set of mass balances for the reacting species where the different lengths, number of vinyls and number of branching points are taken into account. A triple moment technique was used to calculate number and weight average molecular weights as well as average number of branching points for species having j vinyls, j=0, 1, 2 To calculate molecular weight distributions we apply another transform technique that makes use of probability generating function (pgf) definitions applied to the number and weight MWD, following the ...
The influence of molecular weight distribution and extrusion processing variables on the morphological features and orientation of high density polyethylene (HDPE) uniaxially extruded tubular films was investigated. In order to gain a better understanding of the orientation-crystallization behavior occurring during extrusion processing, the melt flow properties of the two HDPE resins with identical <(M)over bar (n)> (14 600) values but different molecular weight distributions (<(M)over bar (w)>/<(M)over bar (n)> = 10.3, 15.1), utilized in our previous study, were characterized by dynamic rheological experiments over the temperature range from 150 degrees C to 230 degrees C within the angular frequency range from 0.1 to 100 rad/s. The experimental data were shifted to produce master flow curves. The how activation energy calculated from the shifting process was found to be 25.9 kJ/mol for resin 1 and 29.1 kJ/mol for resin 2. The characteristic relaxation time at 190 degrees C obtained by use of a ...
Extractable dietary fiber (DF) plays an important role in nutrition. This study on porridge making with whole grain rye investigated the effect of rest time of flour slurries at room temperature before cooking and amount of flour and salt in the recipe on the content of DF components and molecular weight distribution of extractable fructan, mixed linkage (1→3)(1→4)-β-D-glucan (β-glucan) and arabinoxylan (AX) in the porridge. The content of total DF was increased (from about 20% to 23% of dry matter) during porridge making due to formation of insoluble resistant starch. A small but significant increase in the extractability of β-glucan (P = 0.016) and AX (P = 0.002) due to rest time was also noted. The molecular weight of extractable fructan and AX remained stable during porridge making. However, incubation of the rye flour slurries at increased temperature resulted in a significant decrease in extractable AX molecular weight. The molecular weight of extractable β-glucan decreased greatly during
Macrophage suppression has been shown to be mediated by a unique, low molecular weight fraction of murine serum. The present investigation involves the in vitro production of this macrophage modulator (suppressor) by Concanavalin A-stimulated spleen cells. Spleen cell culture supernatant containing macrophage suppressor factor (MSF) caused a significant decrease in in vitro phagocytosis of Listeria monocytogenes by non-elicited peritoneal macrophages. The molecular weight of MSF was determined by ultrafiltration to be less than 10,000, and the modulating activity of MSF was not altered by heating at 100°C for 30 minutes or freezing at -70°C for six months. MSF is resistant to treatment with Pronase E, but is, however, sensitive to acid hydrolysis. Activity of MSF in spleen cell culture supernatants from normal mice does not differ from supernatants from mice immunized with L. monocytogenes. It was therefore concluded that MSF is not affected by antigenic stimulation and is apparently produced
In this study, we show how the combining an ACQUITY Advanced Polymer Chromatography (APC) System combined with a 2414 Refractive Index (RI) Detector and ACQUITY QDa Mass Detector can be used to simultaneously measure polymer molecular weight distribution and polymer additive detection.
TY - JOUR. T1 - Extended Fujita approach to the molecular weight distribution of polysaccharides and other polymeric systems. AU - Harding, Stephen E.. AU - Schuck, Peter. AU - Abdelhameed, Ali Saber. AU - Adams, Gary. AU - Kök, M. Samil. AU - Morris, Gordon A.. PY - 2011/5. Y1 - 2011/5. N2 - In 1962 H. Fujita (H. Fujita, Mathematical Theory of Sedimentation Analysis, Academic Press, New York, 1962) examined the possibility of transforming a quasi-continuous distribution g(s) of sedimentation coefficient s into a distribution f(M) of molecular weight M for linear polymers using the relation f(M)=g(s)·(ds/dM) and showed that this could be done if information about the relation between s and M is available from other sources. Fujita provided the transformation based on the scaling relation s=κsM0.5, where κs is taken as a constant for that particular polymer and the exponent 0.5 essentially corresponds to a randomly coiled polymer under ideal conditions. This method has been successfully ...
Four size exclusion chromatography (SEC) calibration techniques were tested for use in the molecular weight characterisation of Streptococcal Hyaluronic Acid (HA). An exponential equation, evaluated using the Hamielec method, was superior to the customary peak position method. It provided the most accurate estimates of the weight average molecular weight, Mw. The calibration was valid for HA in the range 800 - 2500 kDa, and permitted the calculation of both polydispersity and molecular weight distributions for HA from Streptococcal fermentations. This exponential calibration approach should have application in the characterisation of other large biopolymers, particularly where pore size of available SEC media is limiting ...
A mathematical model is developed for the molecular weight distribution (IMWD) of a polyethylene terephthalate (PET) polycondensation process based on the reaction mechanisms and the operating conditions. It employs the logical combination of the reaction extent method, the moment method and the statistical fitting technique. An optimization scheme is then discussed on the tracking of the desired MWD during the polymerization process.. ...
A method to evaluate molecular weight distribution (MWD) from dynamic moduli is presented here. It relies on the least-square fitting of the dynamic data to a model whose parameters depend on the...
This research is focused on the polymerization of 2-alkyl-2-oxazoline homopolymers and 2-alkyl-2-oxazoline containing copolymers with well-defined structures. In addition, the potential of selected materials as polymer blend compatibilizers was briefly evaluated. The polymerization of 2-alkyl-2-oxazoline was investigated with regard to the effects of initiator structures on molecular weight control and molecular weight distribution, living characteristics, and mechanisms and kinetics. The structure of initiators was shown to greatly affect the molecular weight control and molecular weight distribution of poly (2-ethyl-2-oxazoline). The living nature of poly (2-ethyl-2-oxazoline) in chlorobenzene initiated by benzyl iodide, benzyl chloride/NaI, or chloroethyl ethyl ether/NaI has been established by Mn-conversion plots and sequential monomer addition experiments. However, the molecular weight distributions of these polymers were not as narrow as Poisson distributions, Mechanistic and kinetic ...
Matossian, rogers A.; Rogers, P; Ledbetter, J A.; and Herzenberg, L A., "Molecular weight determination of two genetically linked cell surface murine antigens: thb and ly-6." (1982). Subject Strain Bibliography 1982. 534 ...
A process for producing a thermoplastic polymer composition comprising: (1) 100 parts by weight of an olefin polymer which comprises ethylene and at least one α-olefin having 3 to 10 carbon atoms and in which the density is in the range of 0.85 to 0.91 g/cm3 and the molecular weight distribution (Mw/Mn) which is the ratio of weight average molecular weight (Mw) and number average molecular weight (Mn) as calculated by a gel permeation chromatography (GPC) is less than 3.5, (2) 5 to 300 parts by weight of a propylene polymer, (3) 5 to 250 parts by weight of an oil, and (4) 0.02 to 3 parts by weight of a radical initiator, which process comprises steps of previously mixing and heat-kneading the olefin polymer, the propylene polymer and the radical initiator; adding the oil in the stage in which cross-linking is at a proportion of 30 to 95% based on the cross-linking degree of the composition to be finally obtained; and further melt-kneading them to cross-link the same.
Summary of Facts and Submissions. I. European patent No. 1 328 591, filed as application number 01 974 468.9, based on the international application published as WO 02/33008, was granted on the basis twenty-three claims. Claim 1 as granted reads as follows (emphasis added):. 1. An aqueous coating composition comprising:. an ambient temperature crosslinkable water-dispersible polyester oligomer(s) less than 80% by weight soluble in water throughout the pH range of from 2 to 10, with a measured weight average molecular weight in the range of from 1,000 to 100,000 Daltons; and. a dispersed polymer(s) which is not a polyester oligomer, the dispersed polymer(s) having a lower limit of 10% by weight, with a measured weight average molecular weight ,=120,000 Daltons;. wherein said composition when drying to form a coating has the following properties:. i) an open time of at least 20 minutes at 23±2ºC;. ii) a wet edge time of at least 10 minutes at 23±2ºC;. iii) a thumb hard time of ,=48 hours at ...
A high solids coating composition useful as a clear coat for an automotive clear coat/color coat finish which contains about 40-80% by weight of a binder and correspondingly about 20-60% by of a liquid organic carrier; wherein the binder contains about: a. an acrylic solution polymer of polymerized monomers of ethylenically unsaturated esters of acrylic acid or methacrylic acid and a hydroxy alkyl acrylate or methacrylate and the polymer has a hydroxyl no. of about 50-200 and a weight average molecular weight of about 4,000-20,000; b. a dispersed polymer of polymerized monomers having stabilizer resin segment that is soluble in the organic carrier and dispersed resin segment that is relatively insoluble in the organic carrier; c. a siloxane oligomer having --OH and --OR groups attached to the silane atoms of the oligomer where R is an alkyl group having 1-6 carbon atoms in the alkyl group or an aryl group and the oligomer has a weight average molecular weight of about 500-5,000; and d. an alkylated
Acetone powders prepared from leaf extracts of Tecoma stans L. were found to catalyze the oxidation of catechol to 3,4,3,4-tetrahydroxydiphenyl. Fractionation of the acetone powders obtained from Tecoma leaves with acetone, negative adsorption of the acetone fraction with tricalcium phosphate gel, and chromatography of the gel supernatant on DEAE-Sephadex yielded a 68-fold purified enzyme with 66% recovery. The enzyme had an optimum pH around 7.2. It showed a temperature optimum of 30° and the Km for catechol was determined as 2 x 10-4 m. The purified enzyme moved as a single band on polyacrylamide gel electrophoresis. Its activity was found to be partially stimulated by Mg2+. The reaction was not inhibited by o-phenanthroline and agr,agr-dipyridyl. The purified enzyme was highly insensitive to a range of copper-chelating agents. It was not affected appreciably by thiol inhibitors. The reaction was found to be suppressed to a considerable extent by reducing agents like GSH, cysteine, ...
The invention provides a polymerization process comprising polymerizing a reaction mixture comprising one or more monomer types, at least one catalyst, and at least one solvent, to form a polymer dispersion, and wherein the at least one catalyst is soluble in the at least one solvent, and wherein the polymer forms a dispersed phase in the solvent, and wherein the at least one solvent is a hydrocarbon. The invention provides a composition comprising an ethylene-based polymer comprising at least the following properties: a) a weight average molecular weight (Mw(abs)) greater than, or equal to, 60,000 g/mole; and b) a molecular weight distribution (Mw(abs)/Mn(abs)) greater than, or equal to, 2.3.
Sulfated low molecular weight lignins (LMWLs) have shown good activity as anticoagulants by allosterically inhibiting thrombin, as well as promising agents for treating emphysema through inhibition of elastolysis, oxidation, and inflammation. Sulfated LMWLs are chemo-enzymatically synthesized from starting monomers caffeic, ferulic, and sinapic acid into sulfated dehydropolymers known as CDS, FDS, and SDS. To further the LMWLs development as drugs, their structural composition and physicochemical characteristics were defined in this work. The molecular weight distribution profile of the sulfated LMWLs from size exclusion chromatography performed on a high pressure liquid chromatography system (SEC-HPLC) changed from bimodal when no surfactant is used in the mobile phase of the HPLC to unimodal when surfactant is used in the mobile phase. This indicates that some large molecular weight species, likely an aggregate of smaller molecular weight chains, are disrupted when surfactant is present. The
The [35S]methionine-labeled proteins released in the medium conditioned by normal and transformed mouse fibroblasts have been analyzed by sodium dodecyl sulfate-polyacrylamide electrophoresis. Three major proteins, fibronectin, procollagens, and a protein with a molecular weight of 45,000 (45K protein) have been identified. The 45K protein, which has not yet been described, accounts for about 30% of the proteins released by control 3T3 fibroblasts or mouse embryo cultures. Quantitation of the radioactivity incorporated by the 45K protein indicated a 10- to 15-fold decrease in 3T3 fibroblasts transformed by Kirsten, Abelson, or Rous sarcoma viruses. The amounts of fibronectin and procollagens released in the medium by transformed cells were also reduced by factors of 3- and 5-fold, respectively. Pulse chase experiments have shown that the decreased level of the 45K protein in the medium of transformed cells cannot be explained by a reduced rate of secretion or by extracellular proteolytic ...
Export Data And Price Of HIGH MOLECULAR WEIGHT RESIN , www.eximpulse.com Eximpulse Services is the place where you can find the recent and updated Trade intelligence report of HIGH MOLECULAR WEIGHT RESIN Export Data. Whole information is based on updated Export shipment data of Indian Customs. All the compilation is done on the basis of All India ports data and has been done on daily basis. This helps you to get all India HIGH MOLECULAR WEIGHT RESIN Export data. You can find previous two days HIGH MOLECULAR WEIGHT RESIN Export data on Eximpulse Services. HIGH MOLECULAR WEIGHT RESIN Export data can be useful in different kind of analysis such as: Export price, Quantity, market scenarios, Price trends, Duty optimization and many more. Some Sample Shipment records for HIGH MOLECULAR WEIGHT RESIN Export Data of India are mentioned above. Further for Free sample and pricing of detailed reports contact on [email protected] Data post 2012 as per Notification No.18/2012 - Customs(N.T.) and does not ...
Dahl, H M.; Truelsen, E; and Blair, G E., "The purification and properties of two low-molecular-weight proteins required for the initiation of translation in ascites tumour cells." (1977). Subject Strain Bibliography 1977. 1411 ...
A first step in characterizing a protein often involves determining its molecular weight. From this information, different proteins may be compared and the number of amino acid residues in a protein can be determined. Here, students determine the molecular weight of two unknown proteins by comparing their electrophoretic migration with the migration of standard proteins. The protein standards and unknowns have been pre-stained so that your students can follow ...
Multilayer thermoplastic film structures comprising at least one heat-sealable outer layer (A) and at least one core layer (B) are disclosed. Layer (A) has improved heat sealability after irradiation (e.g. electron beam). Layer (B) has improved shrinkage after irradiation. Layer (A) is a linear polyethylene having a melt index from about 2 to about 20 g/10 minutes, a density from about 0.88 to about 0.92 g/cc, a molecular weight distribution (I10 /I2) from about 5 to about 8, a fraction of the polyethylene having a degree of branching less than or equal to 2 methyls/1000 carbons of not more than 15% by weight and a fraction of the polyethylene having a degree of branching greater than or equal to 25 methyls/1000 carbons of not more than 25% by weight of the polymer. Layer (B) is a linear polyethylene having a melt index from about 0.05 to about 5 g/10 minutes, a density from about 0.88 to about 0.94 g/cc and a molecular weight distribution (I10 /I2) from about 8 to about 30.
This research investigated the relationships between molecular size and the TOC, TTHM, acid strength and color concentrations present in raw and coagulated water from Lake Washington. Three separate coagulants were utilized for investigation. There were: Al, Fe and Mg. Results indicated that the majority of the TOC, color and TTHM precursors were in the colloidal size range and removed by coagulation. The remaining TTHM precursors are mostly molecular and require a process other than coagulation for removal from the potable water before environmental standards are met.
The process of the present invention may be used to prepare homopolymers of ethylene and copolymers of ethylene and higher alpha olefins having densities in the range of, for example, about 0.900-0.970 g/cm3 and especially 0.910-0.965 g/cm3; the polymers of higher density e.g. about 0.960 and above being homopolymers. Such polymers may have a melt index, as measured by the method of ASTM D-1238, condition E, in the range of for example, 0.1-200 dg/min, typically from about 0.1 to 150 dg/min., and especially in the range of about 0.1 to 120 dg/min. The polymers may be manufactured with narrow or broad molecular weight distribution. For example, the polymers may have a stress exponent, a measure of the molecular weight distribution, in the range of about 1.1-2.5 and especially in the range of about 1.3-2.0. Stress exponent is determined by measuring the throughput of a melt indexer at two stresses (2160 g and 6480 g loading) using the procedures of the ASTM melt index test method, and the ...
The HPSEC-RI elution profiles of ethanol precipitated WE-AX isolated from flours and breads are shown in Fig. 3. The high molecular weight (HMW). polysaccharides present in the endosperm flours of population rye cultivars (Amilo, Diament and Kier) eluted as the single, sharp and symmetric populations in the high molar mass range of the column (11-14 ml). click here Amongst endosperm flour AX of hybrid rye cultivars, only polymers isolated from Koko cultivar had a similar distribution pattern to those of population ryes, with slightly broader distribution. The remaining profiles of AX from endosperm flour of hybrid cultivars (Stach and Konto) and from wholemeals of population cultivars, apart from the HMW populations also contained the low molecular weight (LMW) polymers, eluting at 14.5-17.5 ml. The high-symmetry peaks of endosperm flour AX (Amilo, Diament, Kier and Koko) were ascribed to their highest weight-average molecular weights (Mw) and intrinsic viscosity ([η]) ( Table 2). While, the ...
A graft polymer containing a cyclic structure comprised of a polymer containing a cyclic structure graft-modified with an unsaturated compound containing a polar group, having a graft ratio of 10 to 150 mol %, having a weight average molecular weight of 1,000 to 1,000,000, and having a gel content of not more than 0.1 wt % or having a ratio (Ha/La) of high molecular weight side area (Ha) and low molecular weight side area (La) divided by a vertical line suspended from a peak top of a differentiated elution profile measured by gel permeation chromatography to a baseline of not more than 1.6, a method of production of the same, and a curable composition containing that graft polymer containing a cyclic structure and a curing agent.
Nurkhamidah, S. and Woo, E. M. (2011), Effects of crystallinity and molecular weight on crack behavior in crystalline poly(L-lactic acid). J. Appl. Polym. Sci., 122: 1976-1985. doi: 10.1002/app.34021 ...
Aqueous coating compositions consist essentially of: (a) a water-insoluble film-forming polymeric resin; (b) water-insoluble agglomerated particulate beads of urea, melamine or phenol and formaldehyde; (c) polyethers having the formulaH(OC.sub.x H.sub.2x).sub.n OHwhere x is from 2 to 4 and n is a number such that the polyether has a weight average molecular weight of from about 200 to about 1000; (d) pigments; and (e) water. The aqueous coating compositions are especially useful for imparting to metal coil a low gloss pigmented protective finish having good metal marking resistance.
Lipscomb, D.L.; Boudreaux, M.K.; Paxton, R.; Spano, J.; Welles, E.G.; Schumacher, J., 1997: Identification of thrombospondin as a high molecular mass protein released from activated equine platelets
Yang J.K., Epstein W.. Adenylate cyclase of Escherichia coli K12 has been purified 17,000-fold to near homogeneity from a 5-fold overproducing strain. One major band of Mr = 92,000 and several minor bands are seen on sodium dodecyl sulfate-polyacrylamide electrophoresis of the purest fractions. Identification of the enzyme with the 92,000-Da protein is based on the correlation of this band with activity when highly purified enzyme is eluted from ADP-sepharose columns. The native enzyme has a molecular weight of 95,000 determined by gel filtration, showing that the enzyme is active as a monomer. The purest enzyme has a specific activity of 700 nmol min-1 mg-1, indicating a turnover number of about 100 min-1. Our data indicate that there are only about 15 molecules of the enzyme in wild type cells of E. coli. In crude extracts, over 80% of the activity is soluble after centrifugation at 100,000 x g, indicating the enzyme is soluble or, at most, loosely membrane bound. The enzyme is only moderately ...
In analysis, our results show an unreasonable result. The majority of the failure is from the volume result. From Avogrados law we know that. As such, because the average volume (0.051 L) was low, the mol resulting from it is also low. A small mol results in a large Mr value, or in our case the Mr of Oxygen is too high.. -Another point to that is that if the experiment was assuming r.t.p, our results prove to be incorrect again. If we compared the mol, the actual mol results of andusing the ideal gas laws is different than if we calculated using normal Stoichiometry.. From Stoichiometry, the actual mol of is, and if we compared it to a ratio of 2:2, the actual mol value of is also 0.138 mol. However in our experiment using the gas law, our mol result was. Again this is due to the fact of the low amount of volume recorded.. -In addition to that point, from the section to: Calculate molar mass of Water using the mass of Hydrogen Peroxide , another flaw to the experiment was the amount of ...
The [35S]methionine-labeled proteins released in the medium conditioned by normal and transformed mouse fibroblasts have been analyzed by sodium dodecyl sulfate-polyacrylamide electrophoresis. Three major proteins, fibronectin, procollagens, and a protein with a molecular weight of 45,000 (45K protein) have been identified. The 45K protein, which has not yet been described, accounts for about 30% of the proteins released by control 3T3 fibroblasts or mouse embryo cultures. Quantitation of the radioactivity incorporated by the 45K protein indicated a 10- to 15-fold decrease in 3T3 fibroblasts transformed by Kirsten, Abelson, or Rous sarcoma viruses. The amounts of fibronectin and procollagens released in the medium by transformed cells were also reduced by factors of 3- and 5-fold, respectively. Pulse chase experiments have shown that the decreased level of the 45K protein in the medium of transformed cells cannot be explained by a reduced rate of secretion or by extracellular proteolytic ...
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VisiBlot Standard I is a mixture of 10 recombinant proteins of a molecular weight range from 25 kDa to 150 kDa. Protein bands of 25 kDa, 45 kDa and 85 kDa are prestained allowing monitoring of protein separation during SDS PAGE. The remaining five proteins contain several IgG binding sites. Hence marker proteins bind to primary or secondary antibodies used in Western Blotting facilitating easy marker visualization on the transfer membrane. Because the proteins have no chromophore attached, the marker enables accurate molecular weight estimation. Recommended loading volume for a mini gel is 5 µl/lane. Ready-to-use, no reconstitution, further dilution or heating required Prestained bands for monitoring electrophoresis and membrane transfer Visualization of marker proteins on Western Blots by horseradish peroxidase or alkaline phosphatase-based immune-detection methods Molecular weight determination of proteins detected on transfer membrane
The molar mass of CuNO_3 is 125.55 g/mol Based on the formula youve given me, that compound would actually be copper (II) nitrate. Copper (I) nitrate is CuNO_3 Before we begin heres a tip: atomic weight of element xxnumber of atoms given by subscript = molar mass First, you want to have your handy dandy periodic table available so you can determine the atomic weight of Cu, N, O Cu has an atomic weight of 63.55 g/mol N has an atomic weight of 14.01 g/mol O has an atomic wight of 16.00 g/mol Based on the chemical formula, we have 1 atom of Cu, which would have an atomic weight of 63.55 g/mol Next, we have 1 atoms of N, and that has an atomic mass of 14.01 g/mol You have 3 atoms of O so we would multiply the atomic mass of O by 3 to obtain 48.00 g/mol. Now you want to add the mass of each atom together to obtain the molecular weight of the entire compound: 63.55 g/mol + 14.01 g/mol + 48.00 g/mol = 125.55 g/mol
Staff publications is the digital repository of Wageningen University & Research. Staff publications contains references to publications authored by Wageningen University staff from 1976 onward.. Publications authored by the staff of the Research Institutes are available from 1995 onwards.. Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.. We have a manual that explains all the features ...
Alison Leakey wrote: , , How do I concentrate a low molecular weight protein (less than 5kDa) , from gel filtration fractions ie. dilute???, keeping in mind that , filtration devices and dialysis tubing concentrate above this size. Have you tried concentrating chromatographic techniques (reverse phase chromatography, ion exchange ...
The present invention pertains to an ethylene interpolymer composition characterized as having a narrow molecular weight distribution (MWD) and optimized compositional uniformity, a process for making such a composition and a fabricated article made from such composition. The novel composition is characterized as having at least two polymer components, the first component having an ATREF peak temperature, T.sub.peak1 and a viscosity average molecular weight, M.sub.v1, and the second component having an ATREF peak temperature, T.sub.peak2, and a viscosity average molecular, M.sub.v2, wherein the temperature differential between T.sub.peak2 and T.sub.peak1 decreases with increased composition density and M.sub.v1 /M.sub.v2 is less than or equal to 1.2. The novel composition is further characterized as having a M.sub.w /M.sub.n of less than or equal to 3.3 as determined by gel permeation chromatography, an I.sub.10 /I.sub.2 |6.6, and a composition density
Definition of McCarran Ferguson Act in the Financial Dictionary - by Free online English dictionary and encyclopedia. What is McCarran Ferguson Act? Meaning of McCarran Ferguson Act as a finance term. What does McCarran Ferguson Act mean in finance?
21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. ASTM Method D 3593-77. Standard Test Method for Molecular Weight Averages and Molecular Weight Distribution of Certain Polymers by Liquid Exclusion Chromatography (Gel Permeation Chromatography-GPC) Using Universal Calibration. LH Tung. J Appl Polym Sci 13:775, 1969. LH Tung, JR Runyan. J Appl Polym Sci 13:2397, 1969. MR Ambler, LJ Fetters, Y Kesten. J Appl Polym Sci 21:2439- 2451, 1977. ST Balke, AE Hamielec, BP LeClair, SL Pearce. MA Haney. J Appl Polym Sci 30:3037- 3049, 1985. MA Haney. Am Lab 17(4):116 - 126, 1985. PJ Wang, BS Glasbrenner. J Liq Chromatogr 11(16):3321 -3333, 1988. DJ Nagy, DA Terwilliger. J Liq Chromatogr 12(8):1431 - 1449, 1989. J Cazes, ed. Liquid Chromatography of Polymers and Related Materials (Chromatographic Science Series, volume 8). New York: Marcel Dekker, 1977. J Cazes, X Delamare, eds. Liquid Chromatography of Polymers and Related Materials II (Chromatographic ...
The effects of Na2S04 addition to cement pastes containing PNS superplasticizer with different molecular weight were investigated in different parameters of cem
The present invention provides a slurry for chemical mechanical polishing comprising water-soluble clathrate compound (a), polymer compound (b) having an acidic group optionally in a salt form as a side chain, polishing abrasive grain (c) and water (d), wherein the content of the water-soluble clathrate compound (a) is 0.001 mass % - 3 mass % of the total amount of the slurry, the polymer compound (b) has a weight average molecular weight of not less than 1,000 and less than 1,000,000, and the content of the polymer compound (b) is 0.12 mass % - 3 mass % of the total amount of the slurry, and a polishing method for substrate using the slurry.
Figure 1 Distribution of linkages in barley 1 3,1 4 - -glucans. G -glucosyl residues 3 1 3 -linkages 4 1 4 -linkages red reducing end arrows sites of hydrolysis by 1 3,1 4 - -glucan endohydrolases EC 3.2.1.73 . From Ref. 10. barley 1 3, 1 4 - -glucans have weight average molecular weights in the range 200,000-300,000 12, 13 . These values correspond to polysaccharides containing 1200-1800 glucosyl residues. The high viscosities of cereal 1 3, 1 4 - -glu-can solutions can be attributed not only.... ...
Colouring of high molecular weight organic substances with the pigment colourant of formula (1) is carried out, for example, by mixing such a pigment colourant with the substrates using rolling mills, mixing or grinding apparatuses, as a result of which the pigment colourant is dissolved or finely divided in the high molecular weight material. The high molecular weight material with the admixed pigment colourant is subsequently processed by methods known perse, for example calendering, compression moulding, extrusion, coating, spinning, casting or by injection moulding, whereby the coloured material acquires its final form. The admixture of the pigment colourant may also be carried out immediately prior to the actual processing step, for example by continuously feeding a solid pigment colourant, for example a pulverulent pigment colourant, and, at the same time, a granulated or powdered high molecular weight organic material, and optionally also additional ingredients, for example additives, ...
A phosphoprotein kinase (EC 2.7.1.37) KIVb, from rat liver nuclei, was purified 75-fold by phosphocellulose chromatography and gel filtration on Sephadex G-200. The enzyme, which has an apparent molecular weight of 55 000, phosphorylates casein and chromatin-bound nonhistone proteins more readily than histones or ribosomal proteins. It exhibits an absolute requirement for divalent cation with optimum activity at 15--20 mM Mg2+. Maximal kinase activity is achieved at 100 mM NaCl. The pH vs. activity curve is biphasic with optima at pH 6.5 and pH 8.0. The Km value for casein is 280 mug/ml and the Km for ATP is 6-10(-6) M. Kinase KIVb phosphorylates numerous nonhistone nuclear proteins as shown by electrophoretic analysis. The addition of kinase KIVb to reaction mixtures containing nonhistone proteins results in the phosphorylation of a spectrum of polypeptides similar to those that are phosphorylated by endogenous nuclear kinases. Nonhistone proteins bound to chromatin appear to be better ...
|strong|Charles Ferguson|/strong| is a filmmaker and writer. He is the founder and president of Representational Pictures, and the director and producer of Inside Job, winner of the 2011 Academy Award for Best Documentary Feature, and of No End in Site: The American Occupation of Iraq, which was an Academy Award nominee as well. His latest film, Time to Choose, is the first comprehensive examination of how to address climate change and the bigger challenge of global sustainability. Ferguson was originally trained as a political scientist and holds a B.A. in mathematics from University of California, Berkeley, and a Ph.D. in political science from MIT. He has also been a consultant to the White House, the Office of the U.S. Trade Representative, the Department of Defense, and several U.S. and European high technology firms. In 1994, Ferguson founded Vermeer Technologies which he sold in early 1996 to Microsoft, which integrated FrontPage into Microsoft Office. After selling Vermeer, Ferguson turned to
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Proteolyses of colicin E3 by both trypsin and subtilisin yield fragments of various molecular weights. On the basis of sodium dodecyl sulfate gel electrophoresis, tryptic cleavage yields peptides of molecular weight about 42 000 and 18 000, while the
View Notes - problemset3KEY from MCB 102 at Berkeley. PROBLEM SET 3 ANSWER KEY FALL 2007 MCB102 Collins Multiple choice, for warm-up 1. The average molecular weight of the 20 standard amino acids
DBP control by nanofiltration was studied. Nine DBPs including THMs were selected as target compounds. Reagent DBPs and DBPs formed as a result of chlorination of NOM contained in river water, were applied to nanofiltration to examine DBPs removal. Humic acid was used to investigate DBP precursor control. Nanofiltration was conducted for about one day for each experiment using two 2-inch membrane modules. NF showed high performance for DBP precursor removal but little effect on the removal of DBPs themselves, especially THMs. In the experiment of DBP precursors removal, rejections were 98 to 100 percent for most of the DBPFPs. For NOM in river water, rejections of THMFPs were 96 to 99 percent. This shows nanofiltration is effective even at low concentrations of NOM. Nanofiltration can remove almost all organic substances with the apparent molecular weight of greater than 2,000 daltons. Molecular weight distribution patterns of the permeate were different depending on NF. THMs showed decreasing ...
Note, that a lot depends on the method of determining molar mass, so 192.8 g/mol can be a honest result, one that needs refining. Imagine using ebuliometric or crioscopic method to determine molar mass of substance that dimerizes to some extent in the solution. You didnt know that beforehand, all you know is that molar mass is off and you have to deal with it somehow ...
Barium hydroxide has a molar mass of 171.34 grams per mole. The molar mass of a chemical compound is determined by adding together the molar masses of all of the atoms present in that compound. The...
Free Download and information on Molar Mass - Molar Mass is a Dashboard widget that calculates the molar mass of a molecule based on the formula entered in the input field. The calculator has an option to show the calculations.
Looking for molecular weights? Find out information about molecular weights. weight of a molecule molecule , smallest particle of a compound that has all the chemical properties of that compound. A single atom is usually not referred... Explanation of molecular weights
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GE Healthcare Rainbow™ Molecular Weight Markers Full Range GE Healthcare Rainbow™ Molecular Weight Markers Molecular Weight Markers
Here are the plots of molecular weight vs. bit count. This is molecular weight vs. Daylight bit strings. This is molecular weight vs. BCI bit strings and this is molecular weight vs. Unity bit strings. We see, again,the upper part of the plots, those data are the structures with more repeated fragments. For example, let us see the structure of this compound. ...
You could certainly try running some of the DNA on the gel if you wanted to. I would suspect that you will see a lot of large molecular weight material that would correspond to the genomic DNA, again it would depend on what kind of protocol you were using to isolate the DNA in the first place, but it might give you some indication of how pure it is. I think for a normal plasmid transformation you use around 200 ng of DNA. I looked back at my yeast DNA isolation protocol and all it says is to try transforming between 1-5 ul of DNA. I recall that it was often tricky to get the plasmid back into bacteria - I would get very few transformants. I do believe that some companies sell kits that make it easier to extract plasmid DNA from yeast, but I havent tried them. I remember that one member of this forum was doing a yeast two hybrid screen recently and he was doing transformations with it. Perhaps he can give you more information ...
Of course, these columns are not restricted to these applications; and these applications are not restricted to these columns… and wed be happy to help you sort out the best choice for your specific application(s).. However … the topic of this entry is "none of the above." Instead, lets spend a minute or two on Size Exclusion Chromatography (SEC) for mAbs.. YMCs newest size exclusion column uses a stationary phase specifically designed for separating monoclonal antibodies. The product, YMC-SEC MAB, utilizes a 3µm, 250Å dihydroxypropyl stationary phase bonded to a silica gel base.. The 250Å pore size of YMC-SEC MAB is well-suited for separating aggregates from monomer and is also effective at resolving lower molecular weight fragments. YMC-SEC MAB delivers high resolution and excellent peak shape over a broad range of molecular weights (10kDa to 700kDa).. YMC-SEC MAB has been shown to work well for both characterization and quality control of antibody drugs.. Benefits of YMC-SEC ...
This answer depends on the amount of different gasses in the samples of air, the weights of those gasses can affect the final molar measurement. However, the average molar mass of air is 28.9656g/mol.References:Environmental Chemistry: Molar Mass Calculator
The regional metabolism of high-molecular-weight RNA in the developing female rat brain was investigated after the intracranial injection of [32P]P1. The synthesis of polyadenylated RNA relative to high-molecular-weight RNA was determined after oligo(dT)-cellulose chromatography of total cellular high-molecular-weight RNA labelled after 4h. In both hypothalamus and cortex this synthesis was significantly higher during the first 10 days post partum than at subsequent ages. In both regions apparently more mRNA is synthesized in the young. The ratio of the specific radioactivity of cytoplasmic high-molecular-weight RNA relative to that of the nucleus, measured after a 48 h period of labelling, was considered to be an index of the nucleocytoplasmic transport of newly synthesized RNA [Berthold & Lim (1976) Biochem. J. 154, 529-539]. In the cortex, nucleo-cytoplasmic RNA transport in rats aged up to 20 days was significantly higher than in older rats, with the maximal value being attained between 16 ...
Thats correct. The notation for molar mass is M. However, the notation for molarity is also M, so when a question has M in it, be sure you know which M its referring to. If the units for it is g/mol, then its referring to molar mass, whereas if the units are in mol/L, then its referring to molarity ...
When I was an undergrad we did an exercise to determine the molecular weight more accurately of a particular unknown DNA fragment. We ran the unknown fragment next to a ladder of known molecular weight. From a picture of the gel, we determined the distance migrated for each of the bands in the known molecular weight ladder and plotted this relationship on 2-cycle semi-log paper where the distance traveled was on the x-axis. The molecular weight was plotted on the y-axis...the log portion. From a best fit line, the molecular weight of the unknown DNA fragment could be determined. If you plot this on straight linear graph paper, youll need to take the log of the molecular weight first.. ...
Analysis of Extracted DNA Samples Samples of DNA were quantitatively assayed using spectrophotometery by measuring absorbance at 260 nm (A260), 280 nm (A280), and 230 nm (A230) to determine concentration of ds DNA, and to measure A260 to A280 ratio (optimal ratio is equal to 1.8 or more and less than 2) and A260 to A230 ratio (optimal ratio is greater than 2.2). A280 is an estimate of concentration of non-DNA components. such as proteins, whereas A230 is measured to estimate concentration of other components such as detergents, peptides, carbohydrates, Inhibitors,research,lifescience,medical phenol and chloroform. Some randomly selected samples were assayed quantitatively by running on a 2% agarose gel electrophoresis, Inhibitors,research,lifescience,medical allowing the molecular weight of the DNA to be estimated. The electrophoresis resulted in a thick smear of DNA fragments with variable size ranging from very high molecular weight DNA to those about 100 bp in size (figure 1). Moreover, some ...
The molar mass of CCl4 is about 153.82 grams per mole. The molar mass of a compound is defined as the atomic weight of all the atoms contained in one mole of the substance. One molecule of CCl4...
Molar Mass 0.4 - Widget to calculate the molar mass of a molecule. Download the latest versions of the best Mac apps at safe and trusted MacUpdate
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The molecular weight of a substance expresses the relative mass of its molecule in composition to some arbitrarily selected standard. Molecular weight in chemistry is considered a simple matter being just the weight of one mole of the compound. The molecular weight of a substance is pure number having no unit ...
Molecular weight is a measure of the total amount of atomic weight values of any atom present in a molecule. In chemistry, molecular weight is used in determining the stoichiometry present in all chemical equations and reactions...
Get an answer for A compound with the empirical formula CH2 has a molar mass of 112 g/mol. What is the molecular formula for this compound? and find homework help for other Science questions at eNotes
The molar mass of a certain gas is 58.1 g/mol. What is the density of the gas in g/L at STP?use the ideal gas law, PV=nRT -| P=nRT/V sub in: n...
Choose from a range of DNA, RNA and protein molecular weight markers. Use the DNA molecular weight markers for both conventional and pulsed field gel electrophoresis applications.
In article ,3u5mss$j93 at is.bbsrc.ac.uk, Your Name ,your.name at bbsrc.ac.uk, writes: , Does anyone know of a gcg programme which will calculate , the molecular weight of DNA fragments? Dear Your Name: Huh?? Why do you need a program in the GCG package to do this??? This should be very easy to do on your pocket calculator... T = 322.2 A = 331.2 C = 307.2 G = 347.2 If you only know the sequence of one strand, and want to know the molecular weight of the entire double-stranded DNA: MW of strand1 = #T(322.2) + #A(331.2) + #C(307.2) + #G(347.2) PLUS MW of strand2 = #T(331.2) + #A(322.2) + #C(347.2) + #G(307.2) Therefore the overall MW is #T(322.2 + 331.2) + #A(331.2 + 322.2) + #C(307.2 + 347.2) + #G(347.2 + 307.2) --------------------------------------- OR #T(653.4) + #A(653.4) + #C(654.4) + #G(654.4) OR 653.4(#T + #A) + 654.4(#C + #G) OR If you know the %GC of the single stranded sequence, MW in daltons for the double stranded DNA would be = (%GC * total length) (100-%GC * total length) ...
A solution is labeled 2.89ppm and is made with a solute that has molar mass equal to 522 g/mol. What is the molarity of the solution? I'm not too concerned with the answer as this is just an example on my homework, but I need to know how to set up the problem to work other problems. Thank you!
RxBio-1kb DNA Ladder is ideal for assessment of a range of DNA sizes, which consists of ten discrete DNA fragments: 500, 1000, 1500, 2000, 3000, 4000, 5000, 6000, 8000 and 10000bp. This marker is supplied in loading buffer containing tracking dye and precipitant for agarose gel electrophoreses, which is in a convenient ready-to-load format. The recommended volume for each lane is 5µl and each band DNA quantity approximately is 50ng, and 2000bp, 5000bp DNA fragment quantity approximately are 100ng, the demonstration bright band.. ...
Proteins interact with a variety of other molecules such as nucleic acids, small molecules and other proteins inside the cell. Structure-determination of protein-protein complexes is challenging due to several reasons such as the large molecular weights of these macromolecular complexes, their dynamic nature, difficulty in purification and sample preparation. Computational docking permits an early understanding of the feasibility and mode of protein-protein interactions. However, docking algorithms propose a number of solutions and it is a challenging task to select the native or near native pose(s) from this pool. DockScore is an objective scoring scheme that can be used to rank protein-protein docked poses. It considers several interface parameters, namely, surface area, evolutionary conservation, hydrophobicity, short contacts and spatial clustering at the interface for scoring. We have implemented DockScore in form of a webserver for its use by the scientific community. DockScore webserver can be
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RxBio-1kbPlus DNA Ladder is ideal for assessment of a range of DNA sizes, which consists of 15 discrete DNA fragments: 100, 200, 300, 400, 500, 700, 1000, 1500, 2000, 3000, 4000, 5000, 6000, 8000 and 10000bp. This marker is supplied in loading buffer containing tracking dye and precipitant for agarose gel electrophoreses, which is in a convenient ready-to-load format. The recommended volume for each lane is 5µl and each band DNA quantity approximately is 50ng, and 500bp. 3000bp DNA fragment quantity approximately are 100ng, the demonstration bright band.. ...
A method of measuring the flow and composition of a fluid or mixture of fluids through a system by determining the temperature, pressure and speed of sound in the fluid or mixture of fluids in the system and calculating the flow, molar density and average molecular weight of the fluid from the equation: ##EQU1## wherein: ##EQU2## c=speed of sound P=pressure of the fluid T=temperature of the fluid ρ=molecular density of the fluid M=average molecular weight of the fluid φ=velocity potential t=time.
COMBINING STOICHIOMETRY AND MOLAR MASS CONVERSIONS (MOLES TO GRAMS CONVERSIONS): Now that we are more comfortable with stoichiometry, we can combine it with
Calculate the distance between $Na^+$ and $CI^−$ ions in NaCI crystal if its density is $2.165 gcm^{−3}$. [Molar mass of $NaCI = 58.5 gmol^{−1};N_A =6.02 × 10^{23} mol^{−1}$] ...
Get an answer for what is the purpose of molar mass of a volatie liquid lab experiment? and find homework help for other Science questions at eNotes
Well go through three examples progressing from easy to difficult. By the end of this post, youll be able to calculate the molar mass of anything.
This is a small molar mass calculator for the Ti-89. Its about 4 Kb and is easy to use. It finds answers to three or four decimal places. Now it uses a binary search so it runs a lot faster. ...
ACQUITY APC AQ columns are designed to provide highly efficient size-based separations for water soluble polymer characterization. The sorbent uses patented Ethylene Bridge Hybrid (BEH) technology to provide a mechanical strong packed bed that resists shinking and swelling for easy mobile phase solvent switching. The expected molecular weight range for this column is approximatley 20,000 - 400, 000 g/mole.
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MNA-G has a MW=16,000 and MNA-M has a doublet of MW=15,000 and 16,000 when analyzed by SDS-PAGE. Higher molecular weight species (>5 million Da) are present in samples analyzed by gel filtration ...
AP BIOLOGY 2007 SCORING GUIDELINES (Form B) Question 2 The defenses of the human body to the entry and establishment of a pathogen (disease-causing organism) can be divided into nonspecific responses and
View Notes - 2003 Form B from BIOLOGY 101 at Abant İzzet Baysal University. following physiological responses, explain how hormones cause the response in animals. · increase in height · adjustment