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Tetradehydrocheilanthiofolinium

$660

  • Brand : BIOFRON

  • Catalogue Number : AV-H07065

  • Specification : 98%

  • CAS number : 38691-95-1

  • Formula : C19H16NO4

  • Molecular Weight : 322.33

  • PUBCHEM ID : 3084708

  • Volume : 10mg

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Catalogue Number

AV-H07065

Analysis Method

HPLC,NMR,MS

Specification

98%

Storage

2-8°C

Molecular Weight

322.33

Appearance

Yellow crystalline powder

Botanical Source

Thalictrum glandulosissimum

Structure Type

Alkaloids

Category

Standards;Natural Pytochemical;API

SMILES

COC1=C(C=C2CC[N+]3=C(C2=C1)C=C4C=CC5=C(C4=C3)OCO5)O

Synonyms

Benzo(a)-1,3-benzodioxolo(4,5-g)quinolizinium,11,12-dihydro-9-hydroxy-8-methoxy/Tetradehydrocheilanthiofolinium/Groenlandicine/Tetradehydrocheilanthifolin

IUPAC Name

16-methoxy-5,7-dioxa-1-azoniapentacyclo[11.8.0.03,11.04,8.014,19]henicosa-1(13),2,4(8),9,11,14,16,18-octaen-17-ol

Applications

Density

Solubility

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

Flash Point

Boiling Point

Melting Point

InChl

InChI=1S/C19H15NO4/c1-22-18-8-13-12(7-16(18)21)4-5-20-9-14-11(6-15(13)20)2-3-17-19(14)24-10-23-17/h2-3,6-9H,4-5,10H2,1H3/p+1

InChl Key

PGIOBGCIEGZHJH-UHFFFAOYSA-O

WGK Germany

RID/ADR

HS Code Reference

Personal Projective Equipment

Correct Usage

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

Meta Tag

provides coniferyl ferulate(CAS#:38691-95-1) 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

30637321

Abstract

Background: It has been documented that international students face diverse challenges due to language and cultural barriers. International medical students suffer from personal distress, a lack of support and perform poorer than local fellow-students in clinical examinations. It has been documented that international medical students benefit from peer-led tutorials in their first year. We investigated the effectiveness of a tutorial offered for international medical students in their second year.

Methods: A peer-guided examination preparation course with interactive elements for second year international medical students was designed, learning objectives were defined. Two evaluations were undertaken: In a quantitative assessment, students were asked to fill out five multiple-choice-questions at the beginning of every session of the tutorial (pre-test) as well as to participate in a post-test at the end of the semester in which all former multiple-choice-questions were re-used. Using a qualitative approach, participants were asked for their thoughts and comments in a semi-structured interview at the end of the semester.

Results: International students (N=12) showed significantly better results in the post- than in the pre-test (t(11)=-8.48, p<.001, d=1.95). Within the interviews, international students (N=10) reported to have benefited from technical and didactic, as well as social learning experiences. The individual lectures students were asked to contribute were discussed controversially. Conclusion: Our peer-guided tutorial for second year international medical students is an effective and well accepted possibility to prepare these students for examinations.

KEYWORDS

international medical students, evaluation, examination preparation course

Title

Interactive peer-guided examination preparation course for second-year international full-time medical students: quantitative and qualitative evaluation

Author

Daniel Huhn,*,1 Karam Al Halabi,2 Obada Alhalabi,2 Christina Armstrong,2 Alexandra Castell Morley,2 Wolfgang Herzog,1 and Christoph Nikendei1

Publish date

2018;

PMID

21926168

Abstract

Protein glutaminase, which converts a protein glutamine residue to a glutamate residue, is expected to be useful as a new food-processing enzyme. The crystal structures of the mature and pro forms of the enzyme were refined at 1.15 and 1.73 a resolution, respectively. The overall structure of the mature enzyme has a weak homology to the core domain of human transglutaminase-2. The catalytic triad (Cys-His-Asp) common to transglutaminases and cysteine proteases is located in the bottom of the active site pocket. The structure of the recombinant pro form shows that a short loop between S2 and S3 in the proregion covers and interacts with the active site of the mature region, mimicking the protein substrate of the enzyme. Ala-47 is located just above the pocket of the active site. Two mutant structures (A47Q-1 and A47Q-2) refined at 1.5 a resolution were found to correspond to the enzyme-substrate complex and an S-acyl intermediate. Based on these structures, the catalytic mechanism of protein glutaminase is proposed.

KEYWORDS

Enzyme Catalysis, Enzyme Mechanisms, Enzyme Mutation, Enzyme Structure, X-ray Crystallography, Covalent Intermediate, Cysteine Protease, Proenzyme, Protein Glutaminase,

Title

Crystal Structures of Protein Glutaminase and Its Pro Forms Converted into Enzyme-Substrate Complex*An external file that holds a picture, illustration, etc. Object name is sbox.jpg

Author

Ryota Hashizume,‡ Yukiko Maki,‡ Kimihiko Mizutani,‡ Nobuyuki Takahashi,‡ Hiroyuki Matsubara,§ Akiko Sugita,§ Kimihiko Sato,§ Shotaro Yamaguchi,§ and Bunzo Mikami‡,1

Publish date

2011 Nov 4

PMID

29659909

Abstract

Background
Human immunodeficiency virus (HIV) and herpes simplex virus type 2 (HSV2) are strongly associated, although mechanisms are not fully understood. An HIV prevention trial allowed reexamination of this association at individual and community levels.

Methods
The HIV Prevention Trials Network 071 (PopART) study evaluates a combination prevention intervention in 21 urban communities in Zambia and South Africa. To measure impact on HIV infection incidence, a cohort of approximately 2000 adults (age range, 18-44 years) was selected randomly from each community. Baseline data on sociodemographic characteristics, behavior, and HIV/HSV2 serologic findings were used to examine the association between HIV and HSV2. At the community level, HIV prevalence was plotted against HSV2 prevalence.

Results
A total of 38691 adults participated. HSV2 prevalence among women and men was 50% and 22%, respectively, in Zambia and 60% and 27%, respectively, in South Africa. Estimated HSV2 infection incidence among those aged 18-24 years was 8.06 cases/100 person-years (95% confidence interval [CI], 6.76-9.35) and 1.76 cases/100 person-years (95% CI, 1.30-2.22) among women and men, respectively. A 6-fold higher odds of HIV infection was seen in HSV2-infected individuals in both sexes, after adjustment for confounders (odds ratio, 6.66 [95% CI, 6.07-7.31] among women and 6.57 [95% CI, 5.56-7.77] among men). At the community-level, there was a strong linear relationship between HIV and HSV2 prevalence (ρ = 0.92; P < .001). Conclusions There was an exquisite association between these 2 infections, at the individual and community levels, likely due in part to a powerful cofactor effect of HSV2 on HIV transmission. HSV2 control could contribute to HIV prevention.

KEYWORDS

HIV, HSV2, South Africa, Zambia, cofactor, urban, ecological analysis

Title

Sexually Transmitted Bedfellows: Exquisite Association Between HIV and Herpes Simplex Virus Type 2 in 21 Communities in Southern Africa in the HIV Prevention Trials Network 071 (PopART) Study

Author

John Bradley,1 Sian Floyd,1 Estelle Piwowar-Manning,4 Oliver Laeyendecker,5 Alicia Young,6 Nomtha Bell-Mandla,7 Justin Bwalya,8 Peter Bock,7 Sarah Fidler,3 Helen Ayles,2,8 Richard J Hayes,1 and HPTN 071 (PopART) Study Team

Publish date

2018 Aug 1;