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3-Acetoxy-11-ursen-28,13-olide

$1,120

  • Brand : BIOFRON

  • Catalogue Number : BN-O1470

  • Specification : 98%(HPLC)

  • CAS number : 35959-08-1

  • Formula : C32H48O4

  • Molecular Weight : 496.7

  • PUBCHEM ID : 21606662

  • Volume : 5mg

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Catalogue Number

BN-O1470

Analysis Method

HPLC,NMR,MS

Specification

98%(HPLC)

Storage

-20℃

Molecular Weight

496.7

Appearance

Cryst.

Botanical Source

This product is isolated and purified from the leaves of Eucalyptus viminalis

Structure Type

Triterpenoids

Category

Standards;Natural Pytochemical;API

SMILES

CC1CCC23CCC4(C5(CCC6C(C(CCC6(C5C=CC4(C2C1C)OC3=O)C)OC(=O)C)(C)C)C)C

Synonyms

Urs-11-en-28-one, 3-(acetyloxy)-13,28-epoxy-, (3β,5ξ,9ξ,17α,18α)-/(3β,5ξ,9ξ,17α,18α)-28-Oxo-13,28-epoxyurs-11-en-3-yl acetate

IUPAC Name

[(1S,4S,5R,8R,10S,13S,14R,17S,18R,19S,20R)-4,5,9,9,13,19,20-heptamethyl-23-oxo-24-oxahexacyclo[15.5.2.01,18.04,17.05,14.08,13]tetracos-15-en-10-yl] acetate

Density

1.1±0.1 g/cm3

Solubility

Soluble in Chloroform,Dichloromethane,Ethyl Acetate,DMSO,Acetone,etc.

Flash Point

278.2±28.5 °C

Boiling Point

572.8±50.0 °C at 760 mmHg

Melting Point

InChl

InChI=1S/C32H48O4/c1-19-9-15-31-18-17-30(8)29(7)14-10-22-27(4,5)24(35-21(3)33)12-13-28(22,6)23(29)11-16-32(30,36-26(31)34)25(31)20(19)2/h11,16,19-20,22-25H,9-10,12-15,17-18H2,1-8H3/t19-,20+,22+,23-,24+,25-,28+,29-,30+,31+,32+/m1/s1

InChl Key

NCXOPROPMCEOMN-NOAGMNDJSA-N

WGK Germany

RID/ADR

HS Code Reference

2933990000

Personal Projective Equipment

Correct Usage

For Reference Standard and R&D, Not for Human Use Directly.

Meta Tag

provides coniferyl ferulate(CAS#:35959-08-1) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Articles of coniferyl ferulate are included as well.>> amp version: coniferyl ferulate

No Technical Documents Available For This Product.

PMID

28788177

Abstract

A study was carried out involving the filling of epoxy resin (EP) with bentonites and silica modified with polyhedral oligomeric silsesquioxane (POSS). The method of homogenization and the type of filler affect the functional and canceling properties of the composites was determined. The filler content ranged from 1.5% to 4.5% by mass. The basic mechanical properties of the hybrid composites were found to improve, and, in particular, there was an increase in tensile strength by 44%, and in Charpy impact strength by 93%. The developed hybrid composites had characteristics typical of polymer nanocomposites modified by clays, with a fine plate morphology of brittle fractures observed by SEM, absence of a plate separation peak in Wide Angles X-ray Scattering (WAXS) curves, and an exfoliated structure observed by TEM.

KEYWORDS

epoxy resin, hybrid polymer composites, polyhedral oligomeric silsesquioxane (POSS), modified bentonite, modified silica, mechanical properties

Title

Epoxy Resin Composite Based on Functional Hybrid Fillers

Author

Mariusz Oleksy,1,* Karolina Szwarc-Rzepka,2 Maciej Heneczkowski,1 Rafał Oliwa,1 and Teofil Jesionowski2

Publish date

2014 Aug

PMID

25977645

Abstract

Diamond-like carbon nanocomposite films with embedded silver nanoparticles are considered experimentally (spectroellipsometric characterization) and theoretically (modeling of optical properties). Metallic nanocomposite films were synthesized by reactive magnetron sputtering and were studied by transmission electron microscope (TEM) and atomic force microscope (AFM). The optical constants of the films were determined from spectroscopic ellipsometry measurements and were modeled using the Maxwell-Garnett approximations. Comparison between the extended and renormalized Maxwell-Garnett theory was conducted. Surface plasmon resonance peak have been found to be strongly dependent on the shape of nanoparticles and interaction between them.

KEYWORDS

DLC:Ag nanocomposite, Surface plasmon resonance, Effective medium theory

Title

Spectroellipsometric characterization and modeling of plasmonic diamond-like carbon nanocomposite films with embedded Ag nanoparticles

Author

Iryna Yaremchuk, Šarunas Meškinis, Volodymyr Fitio, Yaroslav Bobitski, Kestutis Šlapikas, Arvydas ciegis, Zigmas Balevicius, Algirdas Selskis, Sigitas Tamulevicius

Publish date

2015;

PMID

25452668

Abstract

Medicare reimbursement policy encourages frequent provider visits for patients with ESRD undergoing hemodialysis. We hypothesize that patients seen more frequently by their nephrologist or advanced practitioner within the first 90 days of hemodialysis are more likely to undergo surgery to create an arteriovenous (AV) fistula or place an AV graft. We selected 35,959 patients aged ≥67 years starting hemodialysis in the United States from a national registry. We used multivariable regression to evaluate the associations between mean visit frequency and AV fistula creation or graft placement in the first 90 days of hemodialysis. We conducted an instrumental variable analysis to test the sensitivity of our findings to potential bias from unobserved characteristics. One additional visit per month in the first 90 days of hemodialysis was associated with a 21% increase in the odds of AV fistula creation or graft placement during that period (95% confidence interval, 19% to 24%), corresponding to an average 4.5% increase in absolute probability. An instrumental variable analysis demonstrated similar findings. Excluding visits in months when patients were hospitalized, one additional visit per month was associated with a 10% increase in odds of vascular access surgery (95% confidence interval, 8% to 13%). In conclusion, patients seen more frequently by care providers in the first 90 days of hemodialysis undergo earlier AV fistula creation or graft placement. Payment policies that encourage more frequent visits to patients at key clinical time points may yield more favorable health outcomes than policies that operate irrespective of patients’ health status.

KEYWORDS

chronic hemodialysis, economic analysis, ESRD, outcomes, vascular access, epidemiology

Title

Provider Visits and Early Vascular Access Placement in Maintenance Hemodialysis

Author

Kevin F. Erickson, Matthew Mell, Wolfgang C. Winkelmayer, Glenn M. Chertow, Jay Bhattacharya

Publish date

2015 Aug;


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