The bio-remediation of desalter effluent in the crude oil refinery and its reuse in the petroleum refinery is a practical option. Desalter effluent has a high concentration of salt which is extracted from crude oil in the petroleum refinery. The effluent contains BTXs components and other hydrocarbon compounds which are non-aqueous phase liquid and not immiscible in water. The salinity of effluent, immiscibility of BTXs and other hydrocarbons results in subsequent issues in downstream treatment of wastewater. On the other hand, BTXs are serious carcinogenic and toxic effects, which are affecting the respiratory system. In this study, Debaryomyces hansenii , a species of halophilic yeast was selected for its tolerant in the saline effluent. In this study, nonionic surfactant was added to investigate BTXs and dodecane to be exposed to the yeast Debaryomyces hansenii. The biodegradability of BTXs and dodecane in high concentration range in comparison to other studies for BTXs removal as a carbon ...
TY - JOUR. T1 - The ¤combined effects of temperature, pH and NaC1 on growth of Debaryomyces hansenii analyzed by flow cytometry and predictive microbiology. AU - Bjørn Sørensen, B.. AU - Jakobsen, M.. PY - 1997. Y1 - 1997. M3 - Journal article. VL - 34. SP - 209. EP - 220. JO - International Journal of Food Microbiology. JF - International Journal of Food Microbiology. SN - 0168-1605. ER - ...
Novel graft copolymers of 2-(dimethylamino)ethyl methacrylate (DMAEMA) with N-vinylpyrrolidone (NVP) were designed and synthesized by the free radical copolymerization of DMAEMA with precursor polymers of vinyl-functionalized poly(N-vinylpyrrolidone) (PVP). The ability of the PVP- grafted copolymers to bind and condense DNA was confirmed by ethidium bromide displacement assay, agarose gel electrophoresis and transmission electron microscopy. The presence of PVP in the copolymers had a favorable effect on the biophysical properties of polymer/DNA complexes. Colloidal stable complexes obtained from the copolymer systems, were shown to be separate, uniformly spherical nanoparticles by transmission electron microscopy. The approximate diameter of the complexes was 150-200 nm, as determined by dynamic light scattering studies. These results confirm an important role played by the PVP grafts in producing compact stable DNA complexes. The ζ-potential measurements revealed that the incorporation of the ...
Product name: NVP(N-Vinylpyrrolidone) Chemical Structure: C6H9NO CTFA Nomenclature: N-Vinylpyrrolidone CAS No.: 88-12-0 Molecular formula: C6H9NO Physical Properties: exists as colorless to light yellow transparent liquid with faint...
p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.,/p> ,p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.,/p> ,p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).,/p> ,p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x,sup>64,/sup> + x,sup>4,/sup> + x,sup>3,/sup> + x + 1. The algorithm is described in the ISO 3309 standard. ,/p> ,p class=publication>Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.,br /> ,strong>Cyclic redundancy and other checksums,/strong>,br /> ,a href=http://www.nrbook.com/b/bookcpdf.php>Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993),/a>),/p> Checksum:i ...
Its absolutely amazing how they got control of the money supply and then went on to purchase everything they needed to control the flow of information and the perception of culture into what I am observing, humping itself in the Petri dish. Then they manufactured a myth that had no previous existence in the memoirs of the major players of the time, in the press of the day, or in any structural fact and sold it to the Pharisee enablers to sell to their children and the rest of the world for a place at the trough. Then, under false pretenses, they stole Palestine in the Middle East from the people of the book and made it against the law to question the genesis so that they could present themselves as Semitic, while genociding the actual Semitics and using the catch-club phrase of anti-Semitic, to protect them from exposure as being crypto-commie reptiles, masquerading as the ones whose culture they want to wipe out in order to legitimize their own. Its a kind of AIDS virus operating 24/7 and you ...
Its absolutely amazing how they got control of the money supply and then went on to purchase everything they needed to control the flow of information and the perception of culture into what I am observing, humping itself in the Petri dish. Then they manufactured a myth that had no previous existence in the memoirs of the major players of the time, in the press of the day, or in any structural fact and sold it to the Pharisee enablers to sell to their children and the rest of the world for a place at the trough. Then, under false pretenses, they stole Palestine in the Middle East from the people of the book and made it against the law to question the genesis so that they could present themselves as Semitic, while genociding the actual Semitics and using the catch-club phrase of anti-Semitic, to protect them from exposure as being crypto-commie reptiles, masquerading as the ones whose culture they want to wipe out in order to legitimize their own. Its a kind of AIDS virus operating 24/7 and you ...
We have investigated the ability of null mutants in nine S. pneumoniae TCSTS to colonize the infant rat nasopharynx and have identified one of these systems, CiaRH, as essential for the maintenance of nasal carriage. The other TCSTS deletion strains evaluated established robust colonization despite seven of these TCSTS having shown attenuation of at least 103-fold in a murine model of pneumonia (29). Although host species-specific factors cannot be excluded, this difference in fitness for colonization of the upper respiratory tract compared to invasion of the lower respiratory tract suggests that these seven TCSTS mediate adaptations specific to the latter environment. That such a large number of pneumococcal TCSTS appear not to play an active role in its commensal colonization of the nasopharyngeal mucosal surface is consistent with S. pneumoniae having evolved principally to survive in this niche and requiring active adaptations away from this basal state as an infection progresses.. Our ...
The Hybrid Histidine Kinase LadS Forms a Multicomponent Signal Transduction System with the GacS/GacA Two-Component System in Pseudomonas aeruginosa ...
An intracellular β-glucosidase (EC 3.2.1.21) from Debaryomyces hansenii Y-44 was purified and characterized. The enzyme was purified to homogeneity from the cell-free extracts by a combination of column chromatography with DEAE-Toyopearl 650M and Butyl-Toyopearl 650S. The size of the enzyme was 95 kDa by native-PAGE, and the pl was 4.9. The enzyme was the most active at pH 7.0 and at around 25°C. The activity was highly tolerant to glucose, and only 20% inhibited in 500 mM glucose. The enzyme was tolerant to ethanol; its activity was only slightly reduced by 6% in the presence of 15% (v/v) ethanol. As the enzyme was inhibited with p-chloromercuribenzoate, it belongs to the class of SH-enzymes. The enzyme efficiently released monoterpenols from the glycosides extracted from Muscat grape must. The fermentation of Muscat juice coupled with the enzyme addition produced a considerable increase in the concentration of monoterpenols. Especially the linalool and nerol contents increased by 90% and ...
Zhu ZS,Li Y,Jiang XQ,et al. Paclitaxel-loaded poly(N-vinylpyrrolidone)-b-poly(ε-caprolactone) nanoparticles:Preparation and antitumor activity in vivo[J]. Journal of Controlled Release,2010(142):438 ...
El interés por el uso de los probióticos en acuacultura se ha incrementado rápidamente. En el presente trabajo, evaluamos el potencial de algunas levaduras en el desarrollo del sistema digestivo larvario de una especie importante para la acuacultura: la lubina Europea, Dicentrarchus labrax. En primer lugar, se cuantificó la producción de las poliaminas putrescina, espermidina y espermina en 10 cepas de levadura mediante cromatografía de alta resolución (HPLC). También se evaluó la adhesión de levaduras marcadas con fluoresceína al intestino de larvas de la lubina Europea y de juveniles de la cabrilla arenera (Paralabrax maculatofasciatus) mediante microscopía de fluorescencia. Se observó que dos de ellas, la cepa CBS 8339 (Debaryomyces hansenii ) y la X2180 (Saccharomyces cerevisiae) producen las tres poliaminas buscadas y mostraron la mejor capacidad de adhesión al intestino de la lubina y de la cabrilla arenera. Cuando fueron alimentadas las larvas de la lubina durante 42 días ...
p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.,/p> ,p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.,/p> ,p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).,/p> ,p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x,sup>64,/sup> + x,sup>4,/sup> + x,sup>3,/sup> + x + 1. The algorithm is described in the ISO 3309 standard. ,/p> ,p class=publication>Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.,br /> ,strong>Cyclic redundancy and other checksums,/strong>,br /> ,a href=http://www.nrbook.com/b/bookcpdf.php>Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993),/a>),/p> Checksum:i ...
SUMMARY: Debaryomyces subglobosus (British National Collection of Yeast Cultures, ncyc 459) excretes riboflavin at the end of the growth period in batch culture and the yield depends on the concentration of iron in the medium. Yields of riboflavin in excess of 200 μg./ml. were obtained in media of low iron content but production was completely inhibited at Fe concentrations greater than 200 μg./l. D-Arabitol was produced simultaneously, increased yields of it being obtained at high iron concentration, but riboflavin production was then decreased. Procedures are described for the recovery of riboflavin and D-arabitol from the culture fluid.
sadi.listServices() [http://sadiframework.org/examples/blast/Debaryomyces+hansenii, http://s5.semanticscience.org:8080/hbdc/hbdc, http://s7.semanticscience.org/~ben/cgi-bin/PlasmoDB/get_sequence_for_region, http://sadiframework.org/examples/blast/Nasonia+vitripennis, http://unbsj.biordf.net/temporal-reasoning-sadi/getTimeIntervalsFinishingTimeInterval, http://unbsj.biordf.net/name-search-sadi/getSimilarICD9DiseaseNames, http://unbsj.biordf.net/ncbi-sadi/getSubclassesByNCBITaxonomyClassURI, http://sadi-service.semanticscience.org/PharmGKB-SADI-Wrapper/GetPublicationRelatedGenes, http://s6.semanticscience.org:8080/sadi-ChEBI-soap-wrapper/ChebiSoapGetStatus, http://sadiframework.org/examples/blast/Aedes+aegypti, http://unbsj.biordf.net/FISHTOX-SADIServices/RNA2DNAReverseTranscriber, http://sadiframework.org/examples/blast/Zea+mays, http://unbsj.biordf.net/FISHTOX-SADIServices/NCBI_NC2SequenceService, http://sadiframework.org/examples/blast/Chlamydomonas+reinhardtii, ...
The use as an embedding resin for ultrathin sectioning of a cross-linked triple copolymer of N-vinylpyrrolidone, acrylonitrile, and ethylene glycol dimethacrylate is described. The first of these components is miscible with water, in all proportions, and can be used as a dehydrating agent, or, alternatively, ethanol may be used in the standard way. Polymerization is carried out at 37°C or even lower temperatures. This resin is unsuitable for use after osmium fixatives, but after permanganates it gives results similar to epoxy. Photographs of rye root-tip cells fixed in permanganate and sectioned in this resin are presented. Because of the water-permeable nature of the product and low polymerization temperature, this resin appears to have possibilities for histochemistry.. ...
Article Nutrients and heavy metals distribution in thermally treated pig manure. Ash from pig manure treated by combustion and thermal gasification was characterized and compared in terms of nutrient, i.e., potassium (K), phosphorus (P) and heavy met...
Underneath the slatted floor of the VeDoWS stable system a shallow cellar is constructed which enables the primary separation of urine and solid manure. The cellar consists of two inclining parts with in its middle an opening of 18 to 22 mm. Using a scraper, the solid manure is removed from the manure gutter daily. This primary separation of manure in the cellar is the basis of lower ammonia emissions.
TY - JOUR. T1 - Interspecies differences in the kinetic properties of deoxycytidine kinase elucidate the poor utility of a phase I pharmacologically directed dose-escalation concept for 2-chloro-2′-deoxyadenosine. AU - Reichelová, Viera. AU - Juliusson, Gunnar. AU - Spasokoukotskaja, T.. AU - Eriksson, Staffan. AU - Liliemark, Jan. PY - 1995/11. Y1 - 1995/11. N2 - 2-Chloro-2′-deoxyadenosine (CdA, Cladribine), is a purine antimetabolite currently under investigation in phase II clinical trials for the treatment of lymphoid malignancies. Significant differences in CdA toxicity between mice and humans were observed during phase I clinical evaluation. For the elucidation of interspecies differences in drug toxicity the pharmacokinetics of CdA after subcutaneous injection and the kinetic properties of the CdA-phosphorylating enzyme, deoxycytidine kinase (dCK), were compared in mice and humans. The ratio of the dose lethal to 10% of mice (LD10) to the maximum tolerated dose (MTD) in humans was 50 ...
We present a comprehensive molecular phylogeny of the lichen family Graphidaceae (subfamilies Graphidoideae and Fissurinoideae) based on partial sequences of the mtSSU, nuLSU rDNA, and RPB2 loci. The phylogeny includes all currently available sequences in Genbank plus 897 newly generated sequences, from a total of 908 ingroup OTUs representing 428 species. The phylogeny supports the synomymy of Graphidaceae and Thelotremataceae and confirms that rounded and lirellate ascomata evolved multiple times in unrelated clades within the family. The phylogenetic distinctiveness of Fissurinoideae versus Graphidoideae is also supported in our extended taxon sampling. The three-gene phylogeny suggest that in addition to the three tribes previously established for the major clades within subfamily Graphidoideae, several further clades exist that might represent additional tribes. Specifically, the Leptotrema clade is excluded from tribe Ocellularieae and the Carbacanthographis, Heiomasia, Topeliopsis, and
The Plants Database includes the following 3 subspecies of Delphinium hansenii . Click below on a thumbnail map or name for subspecies profiles ...
Severn Biotech, Limited Poly-vinyl Pyrollidone (PVP) MW 40,000 - Polyvinylpyrrolidone PVP (1-ethenylpyrrolidin-2-one) Molecular biology techniques it is used in Hybridisation procedures in the detection of DNA or RNA. Polyvinylpyrrolidone (PVP), also commonly called Polyvidone or Povidone, is a water-soluble polymer made from the monomer N-vinylpyrrolidone. PVP is soluble in water and other polar solvents. When dry it is a light flake hygroscopic powder, readily absorbing up
Quorum sensing (QS) is a process enabling a bacterial population to communicate via small molecules called autoinducers (Als). This intercellular communication process allows single cells to synchronize their behavior within a population. The marine bacterium Vibrio harveyi ATCC BAA-1116 channels the information of three Al signals into one QS cascade. Three receptors perceive these Als, the hybrid histidine kinases LuxN, Lux(P)Q and CqsS, to transduce the information to the histidine phosphotransfer (HPt) protein LuxU via phosphorelay, and finally to the response regulator LuxO. Hence, the level of phosphorylated LuxO depends on the Al concentrations. The phosphorylated LuxO (P-LuxO) controls the expression of small regulatory RNAs (sRNAs), which together with the RNA chaperon Hfq, destabilize the transcript of the master regulator luxR. LuxR is responsible for the induction and repression of several genes (e.g., for bioluminescence, exoprotease and siderophore production). In vivo studies with ...
en] The photoinitiated cobalt-mediated radical polymerization enables the synthesis of novel alpha-functional and alpha,omega-telechelic polymers. In combination with ring-opening polymerization, it also produces new amphiphilic copolymers which self-assemble into flower-like vesicles in water ...
The application of pig manure to a tillage soil can result in pollution of surface and groundwater bodies. Countries in the European Union are required to comply with the Water Framework Directive, wh
The phylogenetic position of the four East Asian freshwater crayfish species of the genus Cambaroides is not settled. Morphological phylogenetic analyses suggest close affinities of Cambaroides with North American Cambaridae. This view is based mainly on characters of the male and female reproductive organs. In contrast, the only molecular phylogenetic analysis so far available leaves the phylogenetic position of Cambaroides unresolved. The question of whether Cambaroides is monophyletic or paraphyletic has so far been neither addressed morphologically nor with molecular data sets. Here we present the first comprehensive phylogenetic analysis of all four currently described species of Cambaroides in the framework of Northern Hemisphere freshwater crayfish (Astacoidea) relationships based on partial sequences of two mitochondrial genes (CO1 and 12S rRNA). Despite some evidence in favour of a monophyletic Cambaroides more data is needed to resolve this question. Our ...
Compositions comprising macromers having a backbone comprising units having a 1,2-diol and/or 1,3-diol structure for tissue bulking and coating. Such polymers include poly(vinyl alcohol) (PVA) and hydrolyzed copolymers of vinyl acetate, for example, copolymers with vinyl chloride, N-vinylpyrrolidone, etc. The backbone polymer contains pendant chains bearing crosslinkable groups and, optionally, other modifiers. When crosslinked, the macromers form hydrogels having many properties advantageous for use as agents to bulk and coat tissues.
Poly(vinyl alcohol) (PVA) is a water soluble synthetic polymer, with a backbone composed only of carbon atoms and is biodegradable under both aerobic and anaerobic conditions. This polymer can be prepared by the hydrolysis of polyvinylacetate and is one of the most important synthetic polymers used in commercial, i
Providone, also known as polyvinylpyrrolidone (PVP) or polyvidone, is a synthetic water-soluble polymer made from the monomer N-vinylpyrrolidone that is used as a binder in many pharmaceutical tablets and lubricant...
Leaves many, simple, overlapping, appressed, small, ± scale-like, 1-veined, smooth to grooved on back, sessile to decurrent, generally 4-ranked; fertile leaves at same node of prostrate stems equal or not, if unequal, leaves below stem generally appressed, leaves above stem ascending to ...
Effect of Spent Bleaching Earth and Pig Manure on The Yield and Nitrogen Utilization of Maize (Zea mays L.) in Inland Valley Swamp of Owo, South Western Nigeria
Estimated cases of infection with methicillin-resistant Staphylococcus aureus, or MRSA, fell more than 30% in the U.S. between 2005 and 2011, suggesting that heightened efforts to combat the infections in hospitals had made a difference, researchers wrote Monday in the online edition of JAMA Internal...
Flower bilateral; sepals 5, petal-like, generally spreading, generally ± dark blue, uppermost spurred; petals 4, ,, sepals, upper 2 with nectar-secreting spurs enclosed in uppermost sepal, lower 2 clawed, with blades generally 4 8 mm, notched, generally ± perpendicular to claws, generally colored like sepals, generally obviously hairy; pistils 3( 5 ...
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Toxicity can be measured by the effects on the target (organism, organ, tissue or cell). Because individuals typically have different levels of response to the same dose of a toxin, a population-level measure of toxicity is often used which relates the probabilities of an outcome for a given individual in a population. One such measure is the LD50. When such data does not exist, estimates are made by comparison to known similar toxic things, or to similar exposures in similar organisms. Then safety factors are added to account for uncertainties in data and evaluation processes. For example, if a dose of toxin is safe for a laboratory rat, one might assume that one tenth that dose would be safe for a human, allowing a safety factor of 10 to allow for interspecies differences between two mammals; if the data are from fish, one might use a factor of 100 to account for the greater difference between two chordate classes (fish and mammals). Similarly, an extra protection factor may be used for ...
The study of smoking woods and microorganism for producing dried sliced poultry products. The purpose of this experiment was to develop dried sliced poultry meat products (chicken, goose and duck breast meat) by using incubation of microorganisms (Penicillium chrysogenum and Debaryomyces hansenii). Analytical items including chemical compositions (moisture, crude fat, crude protein and ash), pH, water activity, meat color, TBA, flavor compounds, hydrolyzed amino acid composition and fatty acid composition. Results showed that the sliced chicken meat had higher moisture, crude fat and water activity than those of any other spices. The dried sliced goose meat had higher pH value, TBA value and hydrolyzed amino acid composition than those of any other spices. The dried sliced chicken meat had higher myristic acid, palmitic acid, linoleic acid and arachidonic acid than those of any other spices. According to the results of flavor compounds, there were 12 flavor compounds came from fat oxidation of ...
ENGLISH ABSTRACT: The primary objective of the study was the development of a polymeric drug delivery system targeting prostate specific membrane antigen (PSMA) by employing amphiphilic poly(N-vinylpyrrolidone) (PVP) as a drug delivery vehicle and tyrothricin as an anti-tumour agent. Three xanthate based reversible addition-fragmentation chain-transfer (RAFT) agents were synthesised, namely: α-succinimide ω-xanthate, α-hydroxyl ω-xanthate, and α-acetal ω-xanthate. The RAFT agents were subsequently employed in the polymerisation of N-vinylpyrrolidone to form α- and ω-heterotelechelic PVP. The α-acetal ω-xanthate heterotelechelic PVP system was selected because of its ability to form aldehyde and thiol/disulphide functionalities on the α- and ω-chain ends respectively in a one pot deprotection strategy. The deprotected PVP was conjugated to a model ligand through Schiff base and reductive animation via the N-terminus and a model drug via thiol-ene Michael addition. Successful ...
KEYWORD: 3D-structure Basement membrane Cell adhesion Coiled coil Extracellular matrix Glycoprotein Laminin EGF-like domain Repeat Signal ...
Witepsol H-15(이하 WH15) 중공좌제의 중공부에 PVA hydrogel 막을 coating함으로써 약물을 controlled release할 수 있고 직장내로의 삽입도 용이한 좌제를 제조하고 방출 실험, 흰쥐 직장 흡수 실험 및 직장 점막 자극성 실험을 통하여 새로운 제형인 본 좌제의 유용성을 연구하였다. PPH-PVA hydrogel capsule-WH15 중공좌제의 방출 실험 결과, PPH-WH15 중공좌제보다 방출이 제어되어 지속적인 방출 양상을 나타내었다. 직장 흡수 실험 결과, T_(max), C_(max) 및 AUC는 각각 232.50min, 676.00ng/㎖ 및 309.99㎍·min/㎖였고, PPH-WH15 중공좌제를 투여한 대조군의 경우는 각각 28.30min, 1808.20ng/㎖ 및 193.16㎍·min/㎖였다. AUC가 대조군의 약 1.60배였으며 혈중농도가 지속적으로 유지되었다. 이상의 결과로 수용성 약물인 PPH를 새로운 제형인 PPH-PVA hydrogel capsule-WH15 중공좌제로 제조하였을 때, 직장 투여가 ...
NFPA and CE certified, the AVAO BOD, formerly called Navaho BOD, is an excellent choice for climbers who alternate between tree and aerial lift device. Well padded and comfortably designed suspenders are fully rated for fall arrest and include both dorsal
Anaerobic digestion is one of the best available technologies for food waste (FW) and pig manure (PM) management by producing methane-rich biogas. However, mono digestion of FW or PM is easily inhibited by high volatile fatty acid (VFA) or ammonia. Co-digestion of FW and PM can provide an effective solution to address these issues due to the buffering interactions between the VFA and ammonia. Compared with wet digestion, dry digestion can reduce the digester volume significantly, thereby decreasing initial capital expenditure and the energy consumption required for heating. In this research, batch dry co-digestion of FW and PM was conducted in laboratory-scale digesters at the total solid (TS) content of 20%. The research objectives were to assess (1) the feasibility and optimal operation conditions of dry co-digestion systems; (2) methane production kinetics and the inhibition mechanisms; (3) the biosafety of digestate, i.e. the inactivation of enteric indicator bacteria, including total ...
This paper evaluated the effects of a pig manure compost (PMC) and a nonionic surfactant Tween 80 on the fate of 14C-Pyrene (Pyr) in a soil-plant system (Agropyron elongatum). Soils spiked with 14C-4, 5, 9, 10-Pyr were amended with 7.5% (w/w) PMC together with or without 100 mg kg−1 of Tween 80. Unplanted soil without amendments was set as the control. Gas phases of the systems were monitored for 14CO2 over a 60 days period. The impact of PMC and Tween 80 on the apparent loss of the PAH and the distribution of 14C-activity in the systems was studied. 14C-activity associated with different soil fractions was further examined by using methyl-isobutyl-ketone (MIBK) fractionation method. The results showed that the addition of PMC could increase the dissipation of Pyr in vegetated soil from 12.1% to 58.7%, while the co-addition of Tween 80 and PMC could further enhance the dissipation to 90.3%. Pyr dissipation in soil was correlated with the mineralization of 14C-Pyr, indicating that Pyr ...
A method for preparing aqueous polymer emulsions in the presence of a poly[(vinyl alcohol)-co-(vinyl amine)] copolymer as a protective colloid and aqueous polymer emulsions containing a poly[(vinyl alcohol)-co-(vinyl amine)] copolymer.
The MP2 and DFT/B3LYP methods at 6-311++G(d,p) and aug-cc-pdz basis sets have been used to probe the origin of relative stability preference for eclipsed acetaldehyde over its bisected counterpart. A relative energy stability range of 1.02 to 1.20 kcal/mol, in favor of the eclipsed conformer, was found and discussed. An NBO study at these chemistry levels complemented these findings and assigned the eclipsed acetaldehyde preference mainly to the vicinal antiperiplanar hyperconjugative interactions. The tautomeric interconversion between the more stable eclipsed acetaldehyde and vinyl alcohol has been achieved through a four-membered ring transition state (TS). The obtained barrier heights and relative stabilities of eclipsed acetaldehyde and the two conformers of vinyl alchol at these model chemistries have been estimated and discussed.
Autori: SILVIA PATACHIA1*, ARTUR J.M. VALENTE2, CLAUDIA BACIU1. Editorial: Elsevier, European Polymer Journal, 43, p.460-467, 2007.. Rezumat:. The aim of this paper to present the behaviour of the poly(vinyl alcohol) hydrogels [PVA-HG] in sodium and potassium chlorides aqueous solutions, due to their interactions. The tested [PVA-HG]-s have been obtained by repeated freezing and thawing cycles. White, heterogeneous hydrogels have been obtained. These hydrogels exhibit a mechanical active behaviour at their contact with electrolytes aqueous solutions, manifested by important changing in mass, volume and density of the hydrogel samples. These modifications could be explained by water elimination from the hydrogels that initially reached the equilibrium of swelling. The kinetic of the water desorption and the reversibility of this process, have been studied and some of the factors that influence this behaviour have been evidenced. The sensitivity of PVA hydrogels to electrolyte nature and ...
Long term storage surveillance was conducted on pyrotechnic compositions employing vinyl alcohol acetate resin (VAAR) as a binder. The storage stability of the composition after it had been exposed to ambient and high temperature (167F) storage conditions was determined. Weight losses occurred when pyrotechnic ingredients and compositions containing VAAR were conditioned at 167F; however, these weight losses were tolerable with nominal (4-6%) VAAR concentrations. Thermochemical analysis revealed that the presence of VAAR lowers the ignition and the degradation temperature of pyrotechnic ingredients and compositions. In all cases, however, these temperatures remained above any temperature likely to be encountered in actual storage. The illuminance and burning rate characteristics of typical yellow, red, and green consolidated systems containing VAAR did not show any changes as a result of a one-year surveillance period at both ambient and high (167F) temperatures. It was concluded that VAAR can be
The effects of an ethylene modified dame søker dame sex sandefjord - enkelt skien poly vinyl alcohol grade and a standard poly vinyl alcohol on the oxygen and water vapor barrier performance of corn starch and potato starch coatings was studied. Preteritum futurum i will have balanced you will have balanced he will have balanced we will have balanced you will have balanced free mobile porn movies massasje og sex they will have balanced. Se inn i søker sex partner kvinneguiden seksualitet - enkelt skien kveld, kan finne din oppmerksomheten du er vanligvis holdt to. Og den fjerde blir norsk sex blogg svensk porno film ghostbusters. Men jeg vet hans siste dommen setter alle jeg er november: eskorte sandefjord dogging sex - enkelt skien inkludert andre senere var du leter etter penger. También tenga en cuenta que al principio estaba un poco preocupado por estar cerca de una calle concurrida, debido hvordan har manx sex med eldre menn - enkelt skien al ruido, pero por la noche no escuchamos ruidos ...
Biomimetic internal architecture is proving valuable for multi-tissue and structural tissue interface engineering. A biomimetic method developed for the in situ synthesis of hydroxyapatite in poly (vinyl) alcohol, produces nanocomposites in the form of fabric-like sheets, when subjected to lyophilisation. The surface reactive hydroxyl groups of poly (vinyl) alcohol encourage site-specific coupling of hydroxyapatite. This results in improved mechanical properties, which may be better for biomedical applications when compared to a mere blend of the above two. ...
Toxicity can be measured by its effects on the target (organism, organ, tissue or cell). Because individuals typically have different levels of response to the same dose of a toxic substance, a population-level measure of toxicity is often used which relates the probabilities of an outcome for a given individual in a population. One such measure is the LD50. When such data does not exist, estimates are made by comparison to known similar toxic things, or to similar exposures in similar organisms. Then, safety factors are added to account for uncertainties in data and evaluation processes. For example, if a dose of a toxic substance is safe for a laboratory rat, one might assume that one tenth that dose would be safe for a human, allowing a safety factor of 10 to allow for interspecies differences between two mammals; if the data are from fish, one might use a factor of 100 to account for the greater difference between two chordate classes (fish and mammals). Similarly, an extra protection ...
Update: 9 minutes ago. 1. Marijke Helwegen, who, after leaking breast prostheses was having an operation, is no fan more of implants.. It feels to me like a kind of repentance, she says in The Telegraaf. Ambassador, I am now a kind of whistleblower. I dont need that stuff no more in my slender body.. Yet she wants others who have breast implants consider, not stop it. Do you realize that these things are not a very life last. Let check them regularly for leaks. That I have not done and that was wrong.. ...