We investigated sequence-specific DNA alkylation using conjugates between the N-methylpyrrole (Py)-N-methylimidazole (Im) polyamide and the DNA alkylating agent, chlorambucil, or 1-(chloromethyl)-5-hydroxy-1, 2-dihydro-3H-benz[e]indole (seco-CBI). Polyamide-chlorambucil conjugates 1-4 differed in the position at which the DNA alkylating chlorambucil moiety was bound to the Py-Im polyamide. High-resolution denaturing polyacrylamide gel electrophoresis (PAGE) revealed that chlorambucil conjugates 1-4 alkylated DNA at the sequences recognized by the Py-Im polyamide core moiety. Reactivity and sequence specificity were greatly affected by the conjugation position, which reflects the geometry of the alkylating agent in the DNA minor groove. Polyamide-seco-CBI conjugate 5 was synthesized to compare the efficacy of chlorambucil with that of seco-CBI as an alkylating moiety for Py-Im polyamides. Denaturing PAGE analysis revealed that DNA alkylation activity of polyamide-seco-CBI conjugate 5 was similar ...

A new upper limit of binding site size is defined for the 2:1 overlapped polyamide:DNA motif. Eight-ring polyamides composed of four-ring subunits containing pyrrole (Py) and imidazole (Im) amino acids linked by a central beta-alanine (beta) spacer (4-beta-4 ligands) were designed for recognition of eleven base pair sequences as antiparallel dimer (4-beta-4)(2) DNA complexes in the minor groove. The DNA binding properties of three polyamides, ImPyPyPy-beta-PyPyPyPy-beta-Dp, ImImPyPy-beta-PyPyPyPy-beta-Dp, and ImImImPy-beta-PyPyPyPy-beta-Dp, were analyzed by footprinting experiments on DNA fragments containing the respective match sites 5-AGTAATTTACT-3, 5-AGGTATTACCT-3 (Dp = dimethylaminopropylamide). Quantitative footprint titrations reveal that each polyamide binds its respective target site with subnanomolar affinity and 7-fold to over 30-fold specificity over double-base-pair mismatch sites. A 20-fold decrease in binding affinity is observed for placement of a side-by-side beta-beta ...

Gene expression is controlled by transcription factors that regulate the rates at which genes are expressed either by recruiting or inhibiting protein complexes that bind to the promoters or enhancers of target genes. Molecules that can specifically modulate these protein-DNA interfaces show promise as tools for understanding gene regulation pathways and may have application in human medicine. Hairpin pyrrole-imidazole polyamides are programmable oligomers that bind the DNA minor groove in a sequence-specific manner with affinities comparable to those of natural DNA-binding proteins. These cell-permeable small molecules have been shown to enter the nuclei of live cells, disrupt protein-DNA interactions, and downregulate endogenous gene expression. This thesis describes the use of polyamides to modulate gene expression in order to probe gene regulation mechanisms of several different biologically relevant systems. A polyamide is designed to target the glucocorticoid receptor transcription factor ...

This chapter describes three complementary footprinting methods and the protocols used for analysis of polyamide : DNA complexes: (1) MPE-Fe(II) footprinting, (2) affinity cleavage, and (3) quantitative DNase I footprint titration. Footprinting with methidiumpropyl-EDTA-Fe(II) [MPE-Fe(II)] is used to identify high-affinity polyamide-binding sites to near nucleotide resolution. Affinity cleavage is used to determine the orientation of the bound polyamide in the minor groove of DNA. Quantitative DNase I footprinting is used to determine equilibrium association constants (K_a) for polyamide-DNA complexes at previously identified match and mismatch sites. A pivotal step in the discovery-evaluation process of new polyamide motifs is the characterization of the affinity and specificity of next-generation molecules following the design-sythesis phase. In the design phase, it is often the case that the sequence preference, as well as the energetics of any new molecule binding at each potential site, is ...

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Polyamides containing N-methylimidazole and N-methylpyrrole amino acids are synthetic ligands that bind DNA by forming side-by-side complexes in the minor groove. Sequence-specificity depends on side-by-side aromatic amino acid pairings: imidazole (Im) opposite pyrrole (Py) targets a G•C base pair, Py/Im targets C•G and Py/Py targets T•A and A•T. This thesis describes work centered on the design of polyamide motifs that increase the binding site size limit, binding affinity and sequence repertoire of polyamides. In addition, polyamides were designed to bind within the regulatory regions of selected genes, which allowed investigations of polyamides as regulators of gene expression ...

Nylon fibers are protected from colorant staining by treating them with at least 2% we/wt (weight dry SAC/weight dry nylon fiber) of sulfonated aromatic aldehyde condensation product. The treated fibers are then fixed by the wet heat method.

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17. A method for improving the salt stress crack behavior of a polyamide composition, comprising (a) providing a polyamide composition comprising nylon-66, nylon-6/66 or nylon 66/6T, and optionally up to 40 weight %, based on the total polyamide component, of nylon-6, nylon-610, nylon-612, nylon-11, nylon-12 or mixtures thereof; (b) melt blending the polyamide with an ionomer comprising at least one copolymer comprising copolymerized units of ethylene, 3 to 20 weight % of copolymerized units of at least one α,β-unsaturated C3-C8 monocarboxylic acid and 0 to 30 weight % of copolymerized units of alkyl acrylate or alkyl methacrylate; and 30 to 90% of the total monocarboxylic acid functionalities are neutralized to salts with a mixture of zinc cations and sodium or lithium cations, wherein the salts comprise from 20 to 90% equivalents of zinc; to provide a molten blend composition comprising about 60 to about 80 weight % of the polyamide and about 20 to about 40 weight % of the ionomer; (c) ...

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There are a number of polyamides that have been employed as stationary phases in TLC, (e.g. polyamide 6,6 (Nylon 6,6) polyhexamethylenediamine, polyamide 6, (Nylon 6), aminopolycapro-lactame and polyamide 11 (Nylon 11) and polyaminoundecanoic acid. Polyamides can be produced. by polycondensing a dicarboxylic acid with a diamine and they can be represented by the following formula.. -[NH-(CH2)6-NH-CO-(CH2)x-C)]n. (if x = 4 then the product is Nylon 6,6, if x = 8 then the product is Nylon 6,10 etc.).. The polyamide material is interesting from a chromatographic point of view in that it can exhibit dispersive interactions with its aliphatic chains, polar characteristics due to interactions with the CO and the amino groups and even offer ion exchange capabilities if appropriately buffered. Nevertheless, the polar characteristics of the polyamides are the most commonly exploited and such materials have been used successfully for the separation of phenols, sulfonic acids, anilines, carbohydrates and a ...

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Oxygen barrier polyamide compositions exhibiting high oxygen scavenging capability suitable for extended shelf-life, packaging applications. Thus a polyamide composition comprises a polyamide homopolymer, copolymer, or blends thereof, and at least one polyamide reactive, oxidizable polydiene or oxidizable polyether. The polyamide products are particularly suited to making barrier packaging articles such as monolayer or multi-layer films, sheets, thermoformed containers and coinjection/coextrusion blow molded bottles comprising PET, polyolefin or polycarbonate as structural layers. Such articles are useful in a variety of oxygen-sensitive food, beverage, pharmaceutical and health care product packaging applications.

Title:Catalytic Synthesis of Bulk Hydrophilic Acetaldehyde-Modified Polyamide 46. VOLUME: 11 ISSUE: 2. Author(s):Hamidreza Barghi, Mikael Skrifvars and Mohammad J. Taherzadeh. Affiliation:School of Engineering, University of Borås, SE-50190 Boras, Sweden and Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-41296 Gothenburg, Sweden.. Keywords:Hydroxylation, Lewis acid, nucleophilic substitute reaction, polyamides, synthesis.. Abstract:Hydrophilization of Polyamide 46 (PA46) via modification with acetaldehyde in continuous phase was studied. The chemical modification of PA 46 with acetaldehyde resulted in a water-swollen polymer with hydrophilic property. The polyamide 46 undergoes a nucleophilic addition with acetaldehyde in the presence of aluminum chloride as a catalyst. The extent of bulk hydroxyethylation using AlCl3 resulted in 95.65% modification counted as total N-hydroxyethylated polyamide 46. The modification resulted in improved hydrophilic ...

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305346410 - EP 0972779 A2 2000-01-19 - Oligonucleotide-polyamide conjugates - Oligonucleotide-polyamide conjugates of the formula X-L-Y, where X is a polyamide, Y is an oligonucleotide, and L is a linker which forms a covalent bond with the amino-terminus of the polyamide X and the 3 phosphate group of the oligonucleotide Y. Conjugates may be synthesized by assembling a polyamide on a solid support matrix, adding a suitable linker molecule, followed by synthesis of the oligonucleotide. Methods for detecting specific polynucleotides with oligonucleotide-polyamide conjugates are also described. IMAGE [origin: WO8903849A1] Oligonucleotide-polyamide conjugates of the formula X-L-Y, where X is a polyamide, Y is an oligonucleotide, and L is a linker which forms a covalent bond with the amino-terminus of the polyamide X and the 3 phosphate group of the oligonucleotide Y. Conjugates may be synthesized by assembling a polyamide on a solid support matrix, adding a suitable linker molecule, followed by

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in which [0024]PA represents a polyamide block; [0025]PE represents a polyether block; and [0026]n represents the number of -PA-PE- units of the said copolymer,and in which [0027]the said blocks originate either entirely from polytrimethylene ether glycol (PO3G) or they originate from a blend or a copolymer of PO3G and of at least one from polyethylene ether glycol (PEG), polypropylene ether glycol (PPG), polytetramethylene ether glycol (PTMG), polyhexamethylene ether glycol and copolymers of tetrahydrofuran (THF) and of 3-alkyltetrahydrofuran (3MeTHF);as waterproof-breathable product or as additive conferring water-breathable properties on thermoplastic polymers in order to form a membrane for selective diffusion according to the nature of the gas;as additive in polyamide 6, polyamide 6.6 or copolyamide based on 6/6.6 intended to be converted to a film in order to improve the mechanical properties and/or the convertibility of the said polyamide ...

The polyester-grafted polyamide of the present invention comprises a polyamide as the backbone and a thermoplastic polyester as the graft and has a number-average molecular weight in terms of standard polymethyl methacrylate of 50,000 to 500,000 as determined by gel permeation chromatography using 1,1,1,3,3,3-hexafluoro-2-propanol. The polyester-grafted polyamide is useful as a modifier for polyesters and polyamides.

Linear polyamides are one of the more important classes of polymeric materials, with wide application in the fields of fibres and plastics. This review will be of interest to everyone who works with or studies polyamides. It is accompanied by around 400 abstracts compiled from the Polymer Library.

Linear polyamides are one of the more important classes of polymeric materials, with wide application in the fields of fibres and plastics. This review will be of interest to everyone who works with or studies polyamides. It is accompanied by around 400 abstracts compiled from the Polymer Library.

Polyamide Epoxy Definition - A polyamide epoxy is a polymer that employs a polyamide resin as a curing agent. A polyamide in an epoxy is essentially...

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Polyamides are a class of DNA minor groove binders that were developed from the natural product Distamycin A. PA25 (20-ring PA) showed better activity (3-fold) in the elimination of HPV16 episomes than PA1 (14-ring PA). Binding studies of PA1 and PA25 were performed in the long control region of HPV16 (7348-122 bp). PA1 showed similar binding affinity to perfect match and single mismatch binding sites. PA1 bound to double, triple, and quadruple mismatch sites with lower affinity. PA25 bound with similar binding affinity to perfect through triple mismatch binding sites. PA25 bound quadruple mismatch sites and nonspecifically. Therefore, it was concluded that PA25 is better at accommodating mismatches in its binding sites. The serine hydrolase family has a catalytic triad that consists of Serine, Histidine, and Glutamic/Aspartic Acid. Acetylcholinesterase (AChE) belongs to the serine hydrolase family. AChE hydrolyzes acetylcholine to stop signal transmission between neurons and thus is a drug target for

Polyamide is based on Nylon 6. Due to its activation process it exhibits a constant selectivity toward flavones, chalkones, anthraquinones, aromatic nitro compounds, DNP amino acids, phenols, carbonic acids, acid amides, sulphonic acids and amides of sulphonic acids as well as towards amines and quinones. Forces which contribute to the separation involve hydrogen bonding between the nitro groups, the phenolic protons, the carboxyl groups etc. of the sample and the free amino groups of the adsorbent.. Shop Polyamide Online. ...

As a commentator up-thread noted, any slip-and-slide model of sequence-specific DNA binding activity by transcription factors fails the sniff test: how is the activator (or repressor) able to effectively scan the nucleotide side-groups to achive site-specificity when the latter are coated with histones (in most eukaryotes) and with other attendant DNA-binding molecules (in all organisms). The notion that the chromosomal DNA molecule exists in all of its double-helical beauty for all proteins to probe seems rather tired and readily debunked to my mind. Ive been a hesitant skeptic of the histone code as anything other than correlative observations, but given the ubiquitous habit of histone compaction of large chromosomal segments, some portions of which obviously remain accessible to transcription factors, it seems clear to me that were missing some vital pieces of the puzzle.. Delete ...

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TY - JOUR. T1 - Towards high-performance materials based on carbohydrate-derived polyamide blends. AU - Wróblewska, Ola. AU - Leoné, Nils. AU - de Wildeman, Stefaan. AU - Bernaerts, Katrien. PY - 2019/3/4. Y1 - 2019/3/4. N2 - A bio-derived monomer called 2,3:4,5-di-O-isopropylidene-galactarate acid/ester (GalXMe) has great potential in polymer production. The unique properties of this molecule, such as its rigidity and bulkiness, contribute to the good thermal properties and appealing transparency of the material. The main problem, however, is that like other biobased materials, the polymers derived thereof are very brittle. In this study, we report on the melt blending of GalXMe polyamides (PAs) with different commercial PA grades using extrusion as well as blend characterization. Biobased PA blends showed limited to no miscibility with other polyamides. However, their incorporation resulted in strong materials with high Young moduli. The increase in modulus of the prepared GalXMe blends with ...

Nylon flocked np swab. Nylon flocked np swab:Our flocked swabs feature perpendicular nylon fibers that optimize specimen collection and elution into transport media. The swabs also feature a molded breakpoint that allows you to safely and easily break off the swab stick, and several breakpoint options are available for different tubes.. Nasopharyngeal flocked swabs utilize innovative nylon fiber technology under the condition of the electrostatic field. Vertical fixed fine flocking provides an excellent sample collection and release. For minimizing invasive bacteria, the plastic stick involves a breakpoint. Break it before screwing the cap. It is really easy to handle and convenient for collection.. How to Collect a Nasopharyngeal Swab for Testing. Choose Huachenyangs professional CY-96000 nasopharyngeal swab with individual packaging. Wash your hands and wear sterile gloves before you grab the stick. Have the patients head backward nearly 70 degrees. Then the nasal swab would go down ...

This research project is directed towards establishing the relationship between the surface areas of intermediately sized molecules (50-300A{dollar}\sp2{dollar}) and their lateral diffusion coefficients in lipid bilayer membranes. Synthetic methods were developed to allow for the preparation of two series of macrocyclic polyamide amphiphiles, with and without fluorescent nitrobenzoxadiazole (NBD) labels, using macrocyclic polyamine aza-crown ethers as starting materials.;The geometry of the macrocyclic polyamides were determined using variable temperature NMR, which has indicated that both the C(O)-N bond and NBD-N bond in the smallest, labelled macrocyclic polyamide exhibit partial double bond character. As a consequence of this restricted bond rotation, both the amide groups and the NBD-N groups of macrocyclic polyamides can be considered as rigid planar moieties.;The surface areas occupied by the macrocyclic polyamides at the air-water interface were determined using a Langmuir film balance, and were

Cure characteristics and mechanical properties of short nylon fiber reinforced acrylonitrile butadiene rubber-reclaimed rubber composites were studied. Minimum torque, (maximum-minimum) torque and cure rate increased with fiber concentration. Scorch time and cure time decreased by the addition of fibers. Properties like tensile strength, tear strength, elongation at break, abrasion loss and heat build up were studied in both orientations of fibers. Tensile and tear properties were enhanced by the addition of fibers and were higher in the longitudinal direction. Heat build up increased with fiber concentration and were higher in the longitudinal direction. Abrasion resistance was improved in presence of short fibers and was higher in the longitudinal direction. Resilience increased on the introduction of fibers. Compression set was higher for blends ...

TY - JOUR. T1 - Separation of Lymphocyte-T and Lymphocyte-B by Nylon Fiber Columns. AU - Stewart, Keith Nicol. PY - 1981. Y1 - 1981. M3 - Comment/debate. VL - 38. SP - 123. EP - 125. JO - Medical Laboratory Sciences. JF - Medical Laboratory Sciences. SN - 0308-3616. IS - 2. ER - ...

Due to their inherent stability under ambient conditions, conductive polyheterocycles has become a topic of great research interest. Simultaneous chemical copolymerization and oxidation of pyrrole and N-methylpyrrole by bromine and iodine has been carried out. The composition of the copolymers can be effectively controlled by varying the monomer feed ratio. From elemental analysis the copolymer composition and the monomer reactivity ratios have been determined. As the copolymer composition changes, the IR absorption spectra show changes in the intensity of certain bands. In bromine-induced polymerization, the electrical conductivity, thermal stability, and bromine content of the copolymer complex decrease with increase in N-methylpyrrole fraction. X-ray photoelectron spectroscopy data suggest that a fixed fraction of bromine is incorporated as covalent bromide in the copolymer complex. When iodine is used, the halogen content do not show substantial differences among the copolymers but the ...

A unique hyperbranched polymeric system with a linear poly-2-dimethylaminoethyl methacrylate (pDMAEMA) block and a hyperbranched polyethylene glycol methyl ether methacrylate (PEGMEMA) and ethylene dimethacrylate (EGDMA) block was designed and synthesized via deactivation enhanced atom transfer radical polymerisation (DE-ATRP) for efficient gene delivery. Using this unique structure, with a linear pDMAEMA block, which efficiently binds to plasmid DNA (pDNA) and hyperbranched polyethylene glycol (PEG) based block as a protective shell, we were able to maintain high transfection levels without sacrificing cellular viability even at high doses. The transfection capability and cytotoxicity of the polymers over a range of pDNA concentration were analysed and the results were compared to commercially available transfection vectors such as polyethylene imine (branched PEI, 25 kDa), partially degraded poly(amido amine) dendrimer (dPAMAM; commercial name: SuperFect (R)) in fibroblasts and adipose tissue ...

To investigate the biochemical and cellular basis for the rise in polymorphonuclear leukocyte (PMN) count during epinephrine administration, PMN from subjects receiving epinephrine were studied for their capacity to adhere to nylon wool fibers and endothelial cell monolayers. After administration of epinephrine, the PMN count increased by 80% at 5 min, and isolated PMN adherence to nylon fibers fell from a base line of 44±2-18±3%. In contrast, when subjects were infused with the β-antagonist propanolol before receiving epinephrine, the PMN count failed to rise and PMN adherence was normal. Exposure of PMN endothelial cell monolayers to 0.1 μM epinephrine led to diminished PMN adherence that could be blocked by 10 μM propanolol but not by 10 μM phentolamine. Sera obtained from subjects 5 min after receiving epinephrine or from supernates derived from endothelial cell monolayers exposed to 90 nM epinephrine inhibited PMN adherence to nylon fibers. Addition of anticyclic AMP antisera but not ...

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3,271,237 PROCESS FOR THE PRODUCTION OF A FIBROUS POLYAMIDE LAMINAR STRUCTURE Erwin Summer and Klaus Gerlach, Obernau am Main, and Klaus Boehme, Erlenbach am Main, Germany, assignors to Vereinigte Glanzstofi-Fabriken AG., Wuppertal-Elberfeld, Germany No Drawing. Filed Sept. 15, 1964, Ser. No. 396,729 Claims priority, application Germany, Sept. 17, 1963, V 24,598 9 Claims. (Cl. 162-146) The invention relates to a process for the production of a fibrous polyamide laminar structure such as paper or non-woven textile fabrics, web-s, fleeces or sheets having a relatively smooth surface. The invention also relates to the products obtained by the process, including both paper and textile types of products. More particularly, the invention is concerned with the production of such non-woven fibrous products on a papermaking machine, wherein the fibers consist essentially of a polyamide. It is well known that synthetic fibers can be waterlaid form an aqueous dispersion onto a papermaking machine in order ...

TY - JOUR. T1 - Influence of calcium carbonate on polyamide 12 regarding melting, formability and crystallization properties. AU - Ippolito, Fabio. AU - Rentsch, Samuel. AU - Hübner, Gunter. AU - Claypole, Timothy. AU - Gane, Patrick. PY - 2019/5/1. Y1 - 2019/5/1. N2 - Controlling and adjusting the thermal properties of a compound to improve the additive manufacturing process of a polymer matrix through selective laser sintering is of key importance to achieve an optimized final part density as well as hardness. In the past, the purpose of adding mineral fillers to polymers was primarily one of cost reduction. Today, however, fillers are more often used to fulfil a functional role, such as improved thermal or mechanical properties of the polymer composite [1]. In this study, the influence of calcium carbonate as a mineral filler particle on the thermal properties in compression-molded polyamide 12 was investigated. The particle size distribution and the filler amount within the polyamide 12 ...

In a study in Occupational and Environmental Medicine, researchers found out that women during her mid 30s exposed to petrol products and synthetic fibers could treble the risk of developing breast

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A carpet and upholstery protector that helps shield fibres from liquid stains. Spills will bead up upon contact with the surface allowing for fast damp sponge spill removal before they are absorbed. It is safe to use on nylon, wool, olefin, polyester, polyamide, poly-cotton and linen fibers. It is suitable to be mill applied to new carpet or fabric at ambient temperature. Alternatively, it can be applied to new carpet, rugs and upholstery (fabric rolls or furniture) as an aftermarket product. It can be applied via a simple hand pump or motorized flat jet sprayer to clean, wet or dry carpets.. A carpet and upholstery protector that helps shield fibres from liquid stains. Spills will bead up upon contact with the surface allowing for fast damp sponge spill removal before they are absorbed. It is safe to use on nylon, wool, olefin, polyester, polyamide, poly-cotton and linen fibres. It is suitable to be mill applied to new carpet or fabric at ambient temperature. Alternatively, it can be applied to ...

A set of aminoalkylamine substituted anthraquinones (AAQs) was successfully synthesised by aminating 1- or 1,5-chloroanthraquinones in a single reaction step. These substituted anthraquinones, 1C3 or 1,5C3, were tethered to minor groove binding polyamides with between 1 - 3 N-methyl pyrrole units (Py) to produce a library of Py-AAQ compounds. It was envisaged that these compounds could improve cytotoxicity through bimodal damage to DNA relative to the individual polyamide or AAQ moieties. A set of py-AAQ platinum complexes was also successfully synthesised by a platinum-mediated alkylamine to nitrile addition. The additional conjugation of a platinum nitrile complex to Py-AAQ conjugates was predicted to generate agents that are more cytotoxic than the Py-AAQ conjugates by damaging DNA via a minor groove binding (MGB)-intercalation-platination mechanism. All newly synthesised Py-AAQs and associated imino coordinated platinum(II) complexes were examined for cytotoxic activity in DLD-1 colon and ...

An improved composite polyamide membrane and methods of making the membrane are described. This improved membrane is prepared using a cationic polymeric wetting agent in an aqueous solution containing a polyfunctional amine reactant which is interfacially polymerized with an acyl halide to form a thin film polyamide discriminating layer on a microporous support. Alternatively, the wetting agent can be applied directly to the substrate and the interfacial polymerization can occur on said treated substrate. The resulting membrane exhibits an unexpected combination of high water flux, high rejection of divalent anion salts, variable sodium chloride rejection and good caustic resistance at low operating pressures. In one embodiment of this invention, a porous substrate is first treated with an aqueous piperazine solution containing a copolymer of vinylbenzyl dimethyl sulfonium chloride and methacrylic acid and then the coated microporous support is contacted with trimesoyl chloride in an organic

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A method of bookbinding comprising the steps of a) applying a film comprising at least one hot melt polyamide at an application temperature of between about 175 C. and about 190 C. to the backbone of a book block said film having a tensile strength greater than about 400 psi and a Youngs modulus of less than about 12,000 psi and b) covering said book block having said film of polyamide with a book cover having a portion thereof in substantially parallel relation to said film.

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In ,1993Feb26.124033.770 at otago.ac.nz, bioc07 at otago.ac.nz writes: , By an act of omission, an acrylamide gel containing DNA was , electroblotted before the DNA could be stained with EthBr. Is there an , easy way to stain the membrane after Southern blotting to get the , position of the markers and such. I suggest that EthBr staining (for locating MW markers) can be avoided totally by simply running end-labelled MW markers (Maniatis) which then produce bands directly on the autorad. We rountinely do this for all of our DNA blots. Bob Rutledge Petawawa National Forestry Institute brutledge at pnfi.forestry.ca ...

Transcription Factor-DNA Binding Motifs in Saccharomyces cerevisiae: Tools and Resources.s profile, publications, research topics, and co-authors

Revision date indicates the date the MSDS or SDS was last revised. MSDS / SDS are dated when they are originally issued AND when any significant change has been made to the chemical compound or research has revealed a health or physical hazard different from what was originally stated. Additional information regarding MSDS / SDS is available at https://www.osha.gov ...

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R. Ukielski, M. Piątek: The effect of polyamide PA12 and polyester PBT blocks lengths on the structure and propertries of multiblock terpoly(amide-block-ester-block-amide) (TPAEA), Polimery, No 11-12/2007, 848. The ternary multiblock system terpoly(amide-b-ester-b-amide) (TPAEA) of the chemical structure: poly[(oligoamide-6.36)-block-(tetramethylene terephthalate)-block-laurolactam)]...

The use of heat treatment to improve solute rejection and fouling resistance of a polyamide reverse osmosis (RO) membrane was investigated in this study. Heat treatment was carried out by immersing the membrane samples in Milli-Q water at 70 °C for a specific duration. Heat treatment (24 h) reduced the pure water permeability from 4.1 to 2.8 L/m2hbar but improved conductivity rejection from 95.5 to 97.0%. As a result, a correlation was observed between changes in the two parameters. Marginal changes in the membrane surface characteristics (i.e. zeta potential, hydrophobicity, chemistry and roughness) were observed as a result of heat treatment. Heat treatment significantly improved the fouling resistance property of the RO membrane. When the secondary effluent was filtrated at an elevated permeated flux, the virgin RO membrane exhibited 30% flux decline while the heat-treated membrane showed only 12% flux decline. This is possibly because heat treatment resulted in a denser cross-linked active ...

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A stain resistant composition for fibers having polyamide linkages prepared by polymerizing an α-substituted acrylic acid or ester in the presence of a sulfonated aromatic formaldehyde condensation plymer, or by polymerization of a sulfonated hydroxyaromatic ester of an α-substituted acrylic acid or acrylic acid, and methods for making and applying the composition.

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, ...

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DSMs revolutionary Pack-Age has been awarded Bronze in packaging innovation contest De Gouden Noot. Pack-Age allows hard to semi-hard cheeses to be ripened naturally.. Akulon polyamide 6 produces a film with high mechanical strength and provides an excellent barrier against oxygen, moisture and CO2. It delivers just enough moisture to the cheese, resulting in a naturally ripened cheese with a mature taste and firm texture while protection against mold growth on the surface results in a higher productivity and lower food waste.. DSM Engineering Plastics. T: +31 46 477 3051. www.dsmep.com. ...