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4‘-Demethyl-3,9-dihydroeucomin

$1,440

  • Brand : BIOFRON

  • Catalogue Number : BN-O1484

  • Specification : 98%(HPLC)

  • CAS number : 107585-77-3

  • Formula : C16H14O5 

  • Molecular Weight : 286.3

  • PUBCHEM ID : 9971218

  • Volume : 5mg

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Catalogue Number

BN-O1484

Analysis Method

HPLC,NMR,MS

Specification

98%(HPLC)

Storage

-20℃

Molecular Weight

286.3

Appearance

Powder

Botanical Source

This product is isolated and purified from the herbs of Scilla scilloides

Structure Type

Flavonoids

Category

Standards;Natural Pytochemical;API

SMILES

C1C(C(=O)C2=C(C=C(C=C2O1)O)O)CC3=CC=C(C=C3)O

Synonyms

4'-demethyl-5-O-methyl-dihydroeucomin/iristectorigenin-A/Iristectorigenin B/4'-demethyl-3,9-dihydropunctatin/4H-1-Benzopyran-4-one, 2,3-dihydro-5,7-dihydroxy-3-[(4-hydroxyphenyl)methyl]-/5,7-Dihydroxy-3-(4-hydroxybenzyl)-2,3-dihydro-4H-chromen-4-one/4,4'-demethyl-3,9-dihydropuctatin/5,7,4'-Trihydroxy-6,3'-dimethoxyisoflavone

IUPAC Name

5,7-dihydroxy-3-[(4-hydroxyphenyl)methyl]-2,3-dihydrochromen-4-one

Density

1.5±0.1 g/cm3

Solubility

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

Flash Point

220.0±20.6 °C

Boiling Point

574.8±39.0 °C at 760 mmHg

Melting Point

InChl

InChl Key

FIASLUPJXGTCKM-UHFFFAOYSA-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#:107585-77-3) 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

31534300

Abstract

Establishing balanced nutrient requirements for maize (Zea mays L.) in the Northern Nigerian Savanna is paramount to develop site-specific fertilizer recommendations to increase maize yield, profits of farmers and avoid negative environmental impacts of fertilizer use. The model QUEFTS (QUantitative Evaluation of Fertility of Tropical Soils) was used to estimate balanced nitrogen (N), phosphorus (P) and potassium (K) requirements for maize production in the Northern Nigerian Savanna. Data from on-farm nutrient omission trials conducted in 2015 and 2016 rainy seasons in two agro-ecological zones in the Northern Nigerian Savanna (i.e. Northern Guinea Savanna “NGS” and Sudan Savanna “SS”) were used to parameterize and validate the QUEFTS model. The relations between indigenous soil N, P, and K supply and soil properties were not well described with the QUEFTS default equations and consequently new and better fitting equations were derived. The parameters of maximum accumulation (a) and dilution (d) in kg grain per kg nutrient for the QUEFTS model obtained were respectively 35 and 79 for N, 200 and 527 for P and 25 and 117 for K in the NGS zone; 32 and 79 for N, 164 and 528 for P and 24 and 136 for K in the SS zone; and 35 and 79 for N, 199 and 528 for P and 24 and 124 for K when the data of the two zones were combined. There was a close agreement between observed and parameterized QUEFTS predicted yields in each of the agro-ecological zone (R2 = 0.69 for the NGS and 0.75 for the SS). Although with a slight reduction in the prediction power, a good fit between the observed and model predicted grain yield was also detected when the data for the two agro-ecological zones were combined (R2 = 0.67). Therefore, across the two agro-ecological zones, the model predicted a linear relationship between grain yield and above-ground nutrient uptake until yield reached about 50 to 60% of the yield potential. When the yield target reached 60% of the potential yield (i.e. 6.0 t ha−1), the model showed above-ground balanced nutrient uptake of 20.7, 3.4 and 27.1 kg N, P, and K, respectively, per one tonne of maize grain. These results suggest an average NPK ratio in the plant dry matter of about 6.1:1:7.9. We concluded that the QUEFTS model can be widely used for balanced nutrient requirement estimations and development of site-specific fertilizer recommendations for maize intensification in the Northern Nigerian Savanna.

KEYWORDS

Site-specific fertilizer recommendations, Indigenous nutrient supply, Soil fertility variability, QUEFTS model, Zea mays L.

Title

Balanced nutrient requirements for maize in the Northern Nigerian Savanna: Parameterization and validation of QUEFTS model

Author

Bello M. Shehu, Bassam A. Lawan, Jibrin M. Jibrin, Alpha Y. Kamara, Ibrahim B. Mohammed, Jairos Rurinda, Shamie Zingore, Peter Craufurd, Bernard Vanlauwe, Adam M. Adam, Roel Merckx

Publish date

2019 Sep 1

PMID

26425035

Abstract

The regional incidence rates of out-of-hospital cardiac arrest (OHCA) were traditionally calculated with the residential population as the denominator. The aim of this study was to estimate the true incidence rate of OHCA and to investigate characteristics of regions with overestimated and underestimated OHCA incidence rates. We used the national OHCA database from 2006 to 2010. The nighttime residential and daytime transient populations were investigated from the 2010 Census. The daytime population was calculated by adding the daytime influx of population to, and subtracting the daytime outflow from, the nighttime residential population. Conventional age-standardized incidence rates (CASRs) and daytime corrected age-standardized incidence rates (DASRs) for OHCA per 100,000 person-years were calculated in each county. A total of 97,291 OHCAs were eligible. The age-standardized incidence rates of OHCAs per 100,000 person-years were 34.6 (95% CI: 34.3-35.0) in the daytime and 24.8 (95% CI: 24.5-25.1) in the nighttime among males, and 14.9 (95% CI: 14.7-15.1) in the daytime, and 10.4 (95% CI: 10.2-10.6) in the nighttime among females. The difference between the CASR and DASR ranged from 35.4 to -11.6 in males and from 6.1 to -1.0 in females. Through the Bland-Altman plot analysis, we found the difference between the CASR and DASR increased as the average CASR and DASR increased as well as with the larger daytime transient population. The conventional incidence rate was overestimated in counties with many OHCA cases and in metropolitan cities with large daytime population influx and nighttime outflow, while it was underestimated in residential counties around metropolitan cities.

KEYWORDS

Out-of-Hospital Cardiac Arrest, Incidence, Epidemiology

Title

Presumed Regional Incidence Rate of Out-of-Hospital Cardiac Arrest in Korea

Author

Young Sun Ro, Seung-sik Hwang, Sang Do Shin, Daikwon Han, Sungchan Kang, Kyoung Jun Song, Sung-il Cho

Publish date

2015 Oct;


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