Bjonnh.net

Curcumin is a constituent (up to ∼5%) of the traditional medicine known as turmeric.

Chemical standardization, along with morphological and DNA analysis ensures the authenticity and advances the integrity evaluation of botanical preparations.

Centrifugal partition chromatography (CPC) and all countercurrent separation apparatus provide chemists with efficient ways to work with complex matrixes, especially in the domain of natural products.

Abstract from conference NAPRALERT is a database on natural products, including data on ethnobotany, chemistry, pharmacology, toxicology, and clinical trials from literature dating back to the 19th century.

The notion of data transparency is gaining a strong awareness among the scientific community.

NAPRALERT is a database on natural products, including data on the ethnobotany, chemistry, pharmacology, toxicology, and clinical trials.

Composite-based, tooth colored dental restorations, in spite of their aesthetic appeal, are limited by a short life span.

I made some new stuff on this project.

Using magit-status each time or having to type the commands was boring.

Today I had to automate changing some IDs in Protege.

Today I received an alert from my work email about a mailbox too full.

To test the ESP, the Arduino system is good enough.

I wanted to make a fretless guitar like Vigier of Ron Thal.

How to connect the ESP8266 and how to communicate with the default non-free firmware to test the device.

I just received my ESP8266-12F from Electrodragon.

Dereplication represents a key step for rapidly identifying known secondary metabolites in complex biological matrices.

The revision of the structure of the sesquiterpene aquatolide from a bicyclo[2.2.0]hexane to a bicyclo[2.1.1]hexane structure using compelling NMR data, X-ray crystallography, and the recent confirmation via full synthesis exemplify that the achievement of

Tonight, I played with git hooks.

High-throughput biology has contributed a wealth of data on chemicals, including natural products (NPs).

Plant derived proanthocyanidins are well-established compounds exhibiting high dentin biomodification potency.

The ability of certain oligomeric proanthocyanidins (OPACs) to enhance the biomechanical properties of dentin involves collagen cross-linking of the 1.3–4.5 nm wide space via protein–polyphenol interactions.

A recent article by Baell(1) on the problems experienced by medicinal chemists with pan-assay interference compounds (PAINS) and Shoichet’s work(2) on the impact of aggregation occurring in high throughput screening libraries, prompts a consideration of h…

C-glycosylated flavones, including orientin, isoorientin, vitexin, and isovitexin, are minor but biologically significant constituents of fruit extracts of the chaste-tree (Vitex agnus-castus L.), a botanical supplement used to treat PMS and postmenopausal

The acquisition of 1D 1H NMR (HNMR) spectra is one of earliest steps in characterizing natural products and other organic molecules.

1D NMR spectra contain a wealth of vital structural information that can enhance the description of bioactive molecules.

This article is in english, but the original one is in french.

Proanthocyanidins (PACs) are secondary plant metabolites that mediate nonenzymatic collagen cross-linking and enhance the properties of collagen based tissue, such as dentin.

The polyphenol source and molecular structure complexity affects interactions of proanthocyanidins (PACs) with dentin matrix.

Stilbenoids have received increasing attention over the last two decades since the discovery of resveratrol in wine.

Dimeric stilbene glucosides 1–3 [two diastereomers of (−)-gnemonoside A (1a and 1b), (−)-gnemonoside C (2), and (−)-gnemonoside D (3)] as well as a mixture of the two enantiomers of gnetin C (4) were isolated from the rhizomes of Gnetum africanum.

The present study demonstrates the importance of adequate precision when reporting the δ and J parameters of frequency domain 1H NMR (HNMR) data.

I use Notmuch to manage my emails (and that’s just wonderfully fast) and use the Emacs frontend for it.

Grapevine canes are rich in resveratrol and its complex derivatives.

Microglia-driven inflammatory processes are thought to play an important role in ageing and several neurological disorders.

Suite à l’émission de France Inter « Sur les épaules de Darwin, La forme des mots », j’ai décidé d’expérimenter un peu avec la conversion d’images en sons par transformée inverse de fourier.

Wine is a major dietary source of numerous potentially health promoting stilbenoids that have been the subject of many qualitative and quantitative studies.

Flavours extracted from oak wood during barrel ageing contribute to the organoleptic character of wines and spirits.

We present stilbenoid profiles of canes from 16 grapevines.

The interaction between Vitis vinifera and trunk disease fungi requires better understanding.

Countercurrent chromatography techniques are increasingly used in the fractionation and purification steps of natural products due to their excellent versatility and efficiency.

The phytochemical study of the root extract of the stilbenoid-rich Vitis riparia × Vitis berlandieri grapevine was carried out by centrifugal partition chromatography (CPC).