BiotoposChemEng
Follow
Find
181 views | +0 today
 
Rescooped by BiotoposChemEngNTUA from Wiki_Universe
onto BiotoposChemEng
Scoop.it!

Free Technology for Teachers: Symbolab - A Scientific Equation Search Engine

Free Technology for Teachers: Symbolab - A Scientific Equation Search Engine | BiotoposChemEng | Scoop.it

Are you looking for a scientific equation search engine? If so check out Symbolab, a search engine that is semantic. Richard Byrne states "rather than just searching the text of your query Symabolab attempts to interpret and search for the meaning of your query" and he suggests you think of "Symbolab as a cross between Google and Wolfram Alpha."


Via Beth Dichter, NikolaosKourakos
more...
No comment yet.
BiotoposChemEng
Χημικοί Μηχανικοί ΕΜΠ
Your new post is loading...
Your new post is loading...
Scooped by BiotoposChemEngNTUA
Scoop.it!

Σχολή Χημικών Μηχανικών Ε.Μ.Π. - Η Σχολή

Σχολή Χημικών Μηχανικών Ε.Μ.Π. - Η Σχολή | BiotoposChemEng | Scoop.it

Σας καλωσορίζουμε στο 'scoop' της ομάδας ΒΙΟΤΟΠΟΣ των Χημικών Μηχανικών του ΕΜΠ

more...
No comment yet.
Rescooped by BiotoposChemEngNTUA from Natural Products Chemistry Breaking News
Scoop.it!

Ion sources for mass spectrometric identification and imaging of molecular species

Ion sources for mass spectrometric identification and imaging of molecular species | BiotoposChemEng | Scoop.it

The ability to transfer molecular species to the gas phase and ionize them is central to the study of natural products and other molecular species by mass spectrometry (MS). MS-based strategies in natural products have focused on a few established ion sources, such as electron impact and electrospray ionization. However, a variety of other ion sources are either currently in use to evaluate natural products or show significant future promise. This review discusses these various ion sources in the context of other articles in this special issue, but is also applicable to other fields of analysis, including materials science. Ion sources are grouped based on the current understanding of their predominant ion formation mechanisms. This broad overview groups ion sources into the following categories: electron ionization and single photon ionization; chemical ionization-like and plasma-based; electrospray ionization; and, laser desorption-based. Laser desorption-based methods are emphasized with specific examples given for laser desorption postionization sources and their use in the analysis of intact microbial biofilms. Brief consideration is given to the choice of ion source for various sample types and analyses, including MS imaging.

 

 

Chhavi Bhardwaja and   Luke Hanley*a   Show AffiliationsNat. Prod. Rep., 2014, Advance Article


DOI: 10.1039/C3NP70094A

 


Via NatProdChem
more...
No comment yet.
Rescooped by BiotoposChemEngNTUA from iPads in Education
Scoop.it!

How to create your own audiobooks

How to create your own audiobooks | BiotoposChemEng | Scoop.it
For authors who want to use their own home equipment to narrate an audio version of their own books, or if you want to record your kids reading their favorite stories for posterity, you can do it with a microphone, and iPad and GarageBand.

Via John Evans
more...
juanjovilar's curator insight, May 27, 2013 1:00 AM

Herramienta para crear tus propios audiobooks.

Lee Hall's curator insight, May 29, 2013 12:17 PM

Children are also willing to practice reading before they record which helps improve fluency.

AlGonzalezinfo's curator insight, May 29, 2013 12:21 PM

Mostly Mac based but a good resource

Rescooped by BiotoposChemEngNTUA from Wiki_Universe
Scoop.it!

How To Cite Social Media Using MLA and APA - Edudemic

How To Cite Social Media Using MLA and APA - Edudemic | BiotoposChemEng | Scoop.it
Social media posts and videos are cropping up in academic publications more and more. This chart shows just how to cite social media with ease.

Via NikolaosKourakos
more...
No comment yet.
Scooped by BiotoposChemEngNTUA
Scoop.it!

Splitting the sea | Chemistry World

Splitting the sea | Chemistry World | BiotoposChemEng | Scoop.it
Polymeric catalyst can oxidise seawater without making toxic chlorine gas as a side product
more...
No comment yet.
Scooped by BiotoposChemEngNTUA
Scoop.it!

Metabolites from Microcystis aeruginosa Bloom Material Collected at a Water Reservoir near Kibbutz Hafetz Haim, Israel - Journal of Natural Products (ACS Publications and Am. Soc. of Pharmacognosy)

Metabolites from Microcystis aeruginosa Bloom Material Collected at a Water Reservoir near Kibbutz Hafetz Haim, Israel - Journal of Natural Products (ACS Publications and Am. Soc. of Pharmacognosy) | BiotoposChemEng | Scoop.it
more...
No comment yet.
Rescooped by BiotoposChemEngNTUA from Natural Products Chemistry Breaking News
Scoop.it!

Mass spectrometry-based metabolomics of single yeast cells

Mass spectrometry-based metabolomics of single yeast cells | BiotoposChemEng | Scoop.it

Single-cell level measurements are necessary to characterize the intrinsic biological variability in a population of cells. In this study, we demonstrate that, with the microarrays for mass spectrometry platform, we are able to observe this variability. We monitor environmentally (2-deoxy-d-glucose) and genetically (ΔPFK2) perturbed Saccharomyces cerevisiae cells at the single-cell, few-cell, and population levels. Correlation plots between metabolites from the glycolytic pathway, as well as with the observed ATP/ADP ratio as a measure of cellular energy charge, give biological insight that is not accessible from population-level metabolomic data.

 

Alfredo J. Ibáñeza,1,Stephan R. Fagerera,1,Anna Mareike Schmidtb,Pawel L. Urbanc,Konstantins Jefimovsd,Philipp Geigera,Reinhard Dechante,Matthias Heinemannf, andRenato Zenobia,2

Proc. Natl Acad. Sci. USA

http://dx.doi.org/10.1073/pnas.1209302110

(2013)


Via NatProdChem
more...
No comment yet.
Rescooped by BiotoposChemEngNTUA from Natural Products Chemistry Breaking News
Scoop.it!

An epigenetic modifier enhances the production of anti-diabetic and anti-inflammatory sesquiterpenoids from Aspergillus sydowii

An epigenetic modifier enhances the production of anti-diabetic and anti-inflammatory sesquiterpenoids from Aspergillus sydowii | BiotoposChemEng | Scoop.it

The addition of a DNA methyltransferase inhibitor, 5-azacytidine, to Aspergillus sydowii fungus culture broth changed its secondary metabolites profile. Analysis of the culture broth extract led to the isolation of three new bisabolane-type sesquiterpenoids: (7S)-(+)-7-O-methylsydonol (1), (7S,11S)-(+)-12-hydroxysydonic acid (2) and 7-deoxy-7,14-didehydrosydonol (3), along with eight known compounds. The isolated compounds were evaluated for their anti-diabetic and anti-inflammatory activities. Among the isolates, (S)-(+)-sydonol (4) did not only potentiate insulin-stimulated glucose consumption but also prevented lipid accumulation in 3T3-L1 adipocytes. Additionally, (S)-(+)-sydonol (4) exhibited significant anti-inflammatory activity through inhibiting superoxide anion generation and elastase release by fMLP/CB-induced human neutrophils. This is the first report on isolating a secondary metabolite with anti-diabetic and anti-inflammatory activities from microorganisms.

 

Yu-Ming Chunga,Chien-Kei Weia,Da-Wei Chuanga,Mohamed El-Shazlya, b,Chi-Ting Hsieha,Teigo Asaic,Yoshiteru Oshimac,Tusty-Jiuan Hsiehd,Tsong-Long Hwange,Yang-Chang Wua, Fang-Rong Chang

Bioorganic & Medicinal Chemistry

Volume 21, Issue 13, 1 July 2013, Pages 3866–3872

http://dx.doi.org/10.1016/j.bmc.2013.04.004


Via NatProdChem
more...
No comment yet.
Rescooped by BiotoposChemEngNTUA from Natural Products Chemistry Breaking News
Scoop.it!

Natural Product Synthesis: Changes over Time

Natural Product Synthesis: Changes over Time | BiotoposChemEng | Scoop.it

For almost 200 years, the synthesis of natural products has been practiced. In this time span, not only the target structures have become increasingly more complex (see two examples from the 1970s), the objectives of natural product synthesis have also changed. Likewise, the standards and criteria for the conduction of natural product synthesis have changed. It is these changes that form the subject of this essay.

 

 

Prof. Dr. Reinhard W. Hoffmann

Angewandte Chemie International Edition

Article first published online: 3 DEC 2012

DOI: 10.1002/anie.201203319


Via NatProdChem
more...
No comment yet.
Rescooped by BiotoposChemEngNTUA from Natural Products Chemistry Breaking News
Scoop.it!

Metabolomics Enables the Structure Elucidation of a Diatom Sex Pheromone

Metabolomics Enables the Structure Elucidation of a Diatom Sex Pheromone | BiotoposChemEng | Scoop.it
Dr. Jeroen Gillard, Johannes Frenkel, Valerie Devos, Prof. Dr. Koen Sabbe, Carsten Paul, Dr. Martin Rempt, Prof. Dr. Dirk Inzé, Prof. Dr. Georg Pohnert, Prof. Dr. Marnik Vuylsteke, Prof. Dr. Wim Vyverman
Angewandte Chemie International Edition
DOI: 10.1002/anie.201208175
Via NatProdChem
more...
NatProdChem's curator insight, December 13, 2012 2:18 AM

Diatoms use chemical signals to sense the presence of and find their mating partners. When the metabolic profiles of sexually active and inactive cells were compared, a highly up-regulated metabolite generated in the attracting mating type was identified as di-L-prolyl diketopiperazine, the first diatom pheromone.

 

Rescooped by BiotoposChemEngNTUA from Wiki_Universe
Scoop.it!

Synthesis: A constructive debate

Synthesis: A constructive debate | BiotoposChemEng | Scoop.it
Synthetic chemistry has long been used to prepare useful compounds — especially those that are hard to obtain from natural sources. But synthetic biology is coming of age as an alternative strategy. A biologist and two chemists debate the merits of their fields' synthetic prowess.

Jay D. Keasling, Abraham Mendoza & Phil S. Baran
Nature 492, 188–189
(13 December 2012)
doi:10.1038/492188a

Via NatProdChem, NikolaosKourakos
more...
No comment yet.
Scooped by BiotoposChemEngNTUA
Scoop.it!

Βιομεθάνιο από οργανικά απόβλητα δίνει θέρμανση σε 56 χιλ. νοικοκυριά – “ξεκουράζει” χωματερές

Βιομεθάνιο από οργανικά απόβλητα δίνει θέρμανση σε 56 χιλ. νοικοκυριά – “ξεκουράζει” χωματερές | BiotoposChemEng | Scoop.it
Σχετικά Άρθρα Οι έμποροι περιορίζουν τα απορρίμματα τροφίμων Μέλισσες παράγουν μπλε και πράσινο μέλι – Ευθύνες σε μονάδα βιοαερίου Ηλεκτρική ενέργεια από βιοαέριο στη Θεσσαλονίκη Η πολυμετοχικότητα...
more...
No comment yet.
Rescooped by BiotoposChemEngNTUA from Wiki_Universe
Scoop.it!

HippoCampus - Homework and Study Help - Free help with your algebra, biology, environmental science, American government, US history, physics and religion homework

HippoCampus - Homework and Study Help - Free help with your algebra, biology, environmental science, American government, US history, physics and religion homework | BiotoposChemEng | Scoop.it
The best multimedia instruction on the web to help you with your homework and study.

Via NikolaosKourakos
more...
No comment yet.
Scooped by BiotoposChemEngNTUA
Scoop.it!

Ολοκληρώθηκαν οι 14 ΒΙΟτοποι για το 2013 χορηγία του Ιδρύματος «Σταύρος Νιάρχος»

Ολοκληρώθηκαν οι 14 ΒΙΟτοποι για το 2013 χορηγία του Ιδρύματος «Σταύρος Νιάρχος» | BiotoposChemEng | Scoop.it
Ο ΑΡΚΤΟΥΡΟΣ, στο πλαίσιο του τριετούς προγράμματος «ΒΙΟτοπος – Η Φύση στην Αυλή μας», το οποίο σχεδίασε και υλοποιεί με
more...
No comment yet.
Rescooped by BiotoposChemEngNTUA from Natural Products Chemistry Breaking News
Scoop.it!

Characterization of FK506 Biosynthetic Intermediates Involved in Post-PKS Elaboration

Characterization of FK506 Biosynthetic Intermediates Involved in Post-PKS Elaboration | BiotoposChemEng | Scoop.it

The post-PKS modification steps of FK506 biosynthesis include C9-oxidation and 31-O-methylation, but the sequence of these reactions and the exact route have remained unclear. This study details the post-PKS modification pathways in FK506 biosynthesis through the identification of all intermediates and in vitro enzymatic reactions of the cytochrome P450 hydroxylase FkbD and the methyltransferase FkbM. These results complete our understanding of post-PKS modification steps to FK506 showing the substrate flexibility of two enzymes involved and the existence of two parallel biosynthetic routes to FK506.

 

Yeon Hee Ban†, Pramod B. Shinde†§, Jae-yeon Hwang†, Myoung-Chong Song†, Dong Hwan Kim, Si-Kyu Lim, Jae Kyung Sohng, and Yeo Joon Yoon

J. Nat. Prod., Article ASAP

DOI: 10.1021/np4001224


Via NatProdChem
more...
No comment yet.
Scooped by BiotoposChemEngNTUA
Scoop.it!

ScienceDirect.com - Tetrahedron Letters - An unusual diepoxyguaianolide from Stevia tomentosa

ScienceDirect.com - Tetrahedron Letters - An unusual diepoxyguaianolide from Stevia tomentosa | BiotoposChemEng | Scoop.it
more...
No comment yet.
Rescooped by BiotoposChemEngNTUA from Natural Products Chemistry Breaking News
Scoop.it!

Characterization of FK506 Biosynthetic Intermediates Involved in Post-PKS Elaboration

Characterization of FK506 Biosynthetic Intermediates Involved in Post-PKS Elaboration | BiotoposChemEng | Scoop.it

The post-PKS modification steps of FK506 biosynthesis include C9-oxidation and 31-O-methylation, but the sequence of these reactions and the exact route have remained unclear. This study details the post-PKS modification pathways in FK506 biosynthesis through the identification of all intermediates and in vitro enzymatic reactions of the cytochrome P450 hydroxylase FkbD and the methyltransferase FkbM. These results complete our understanding of post-PKS modification steps to FK506 showing the substrate flexibility of two enzymes involved and the existence of two parallel biosynthetic routes to FK506.

 

Yeon Hee Ban†, Pramod B. Shinde†§, Jae-yeon Hwang†, Myoung-Chong Song†, Dong Hwan Kim, Si-Kyu Lim, Jae Kyung Sohng, and Yeo Joon Yoon

J. Nat. Prod., Article ASAP

DOI: 10.1021/np4001224


Via NatProdChem
more...
No comment yet.
Scooped by BiotoposChemEngNTUA
Scoop.it!

What is life? How chemistry becomes biology | Chemistry World

What is life? How chemistry becomes biology | Chemistry World | BiotoposChemEng | Scoop.it
The ultimate question
more...
No comment yet.
Scooped by BiotoposChemEngNTUA
Scoop.it!

Catching a reaction in the act | Chemistry World

Catching a reaction in the act | Chemistry World | BiotoposChemEng | Scoop.it
AFM images a reactant and its cyclised products on a silver surface
more...
No comment yet.
Rescooped by BiotoposChemEngNTUA from Natural Products Chemistry Breaking News
Scoop.it!

Mollolide A, a Diterpenoid with a New 1,10:2,3-Disecograyanane Skeleton from the Roots of Rhododendron molle

Mollolide A, a Diterpenoid with a New 1,10:2,3-Disecograyanane Skeleton from the Roots of Rhododendron molle | BiotoposChemEng | Scoop.it

Mollolide A (1), a diterpenoid featuring a new 1,10:2,3-disecograyanane skeleton, was isolated from the roots of Rhododendron molle. Its structure was elucidated through extensive MS, IR, and NMR spectroscopy analyses. The absolute configuration was determined by single-crystal X-ray diffraction of its p-bromobenzoate derivative (1b). Compound 1 exhibits a significant analgesic effect at a dose of 20 mg/kg and antiviral activity against the Coxsackie B3 virus with an IC50 value of 27.7 μM.

 

Yong Li†, Yun-Bao Liu†, Jian-Jun Zhang†, Yu-Huan Li‡, Jian-Dong Jiang†‡, Shi-Shan Yu*†, Shuang-Gang Ma†, Jing Qu†, and Hai-Ning Lv

Org. Lett., Article ASAP

DOI: 10.1021/ol401254e


Via NatProdChem
more...
No comment yet.
Rescooped by BiotoposChemEngNTUA from Wiki_Universe
Scoop.it!

Flipped/Mastery Educational Model: Student Impressions

When Jonathan Bergmann & Aaron Sams started the flipped/mastery model of education, they had no idea that it would strike a chord around the country. One que...

Via NikolaosKourakos
more...
No comment yet.
Rescooped by BiotoposChemEngNTUA from Natural Products Chemistry Breaking News
Scoop.it!

An Alternative Isovaleryl CoA Biosynthetic Pathway Involving a Previously Unknown 3-Methylglutaconyl CoA Decarboxylase

An Alternative Isovaleryl CoA Biosynthetic Pathway Involving a Previously Unknown 3-Methylglutaconyl CoA Decarboxylase | BiotoposChemEng | Scoop.it

Take a detour: An alternative pathway to synthesize isovaleryl coenzyme A (CoA) has recently been suggested in myxobacteria, which is highly active when leucine is limited. Each enzymatic step of this unprecedented route has now been characterized and a novel 3-methylglutaconyl CoA decarboxylase identified that has apparently evolved from CoA transferases.

 

Dr. Yanyan Li, Eva Luxenburger, Prof. Dr. Rolf Müller

Angewandte Chemie International Edition

Article first published online: 6 DEC 2012

DOI: 10.1002/anie.201207984


Via NatProdChem
more...
No comment yet.
Rescooped by BiotoposChemEngNTUA from Wiki_Universe
Scoop.it!

Genome streamlining and chemical defense in a coral reef symbiosis. Kwan et al. 2012. PNAS, 109, 50, 20655-20660.

Genome streamlining and chemical defense in a coral reef symbiosis. Kwan et al. 2012. PNAS, 109, 50, 20655-20660. | BiotoposChemEng | Scoop.it
Jason C. Kwan, Mohamed S. Donia, Andrew W. Han, Euichi Hirose, Margo G. Haygood, and Eric W. Schmidt

DOI : 10.1073/pnas.1213820109
PNAS December 11, 2012 vol. 109 no. 50 20655-20660
Via NatProdChem, NikolaosKourakos
more...
NatProdChem's curator insight, December 12, 2012 4:58 AM

Secondary metabolites are ubiquitous in bacteria, but by definition, they are thought to be nonessential. Highly toxic secondary metabolites such as patellazoles have been isolated from marine tunicates, where their exceptional potency and abundance implies a role in chemical defense, but their biological source is unknown. Here, we describe the association of the tunicate Lissoclinum patella with a symbiotic α-proteobacterium, Candidatus Endolissoclinum faulkneri, and present chemical and biological evidence that the bacterium synthesizes patellazoles. We sequenced and assembled the complete Ca. E. faulkneri genome, directly from metagenomic DNA obtained from the tunicate, where it accounted for 0.6% of sequence data. We show that the large patellazoles biosynthetic pathway is maintained, whereas the remainder of the genome is undergoing extensive streamlining to eliminate unneeded genes. The preservation of this pathway in streamlined bacteria demonstrates that secondary metabolism is an essential component of the symbiotic interaction.

Scooped by BiotoposChemEngNTUA
Scoop.it!

Cerveau Humain Cmap

Cerveau Humain Cmap | BiotoposChemEng | Scoop.it
This Concept Map, created with IHMC CmapTools, has information related to: Cerveau Humain Cmap
more...
No comment yet.
Rescooped by BiotoposChemEngNTUA from Wiki_Universe
Scoop.it!

The Comic Book Periodic Table of the Elements

The Comic Book Periodic Table of the Elements | BiotoposChemEng | Scoop.it
This site contains comic book images linked to the chemical elements via the periodic table. Comics include Uncle $crooge, Metal Men, Metamorpho, Batman, Fantastic Four, Superman, and many more.

Via NikolaosKourakos
more...
No comment yet.
Rescooped by BiotoposChemEngNTUA from Wiki_Universe
Scoop.it!

How Artificial Intelligence Can Change Higher Education ?

How Artificial Intelligence Can Change Higher Education ? | BiotoposChemEng | Scoop.it

Sebastian Thrun, winner of the Smithsonian American Ingenuity Award for education takes is redefining the modern classroom...

http://www.scoop.it/t/easy-mooc


Via Lucas Gruez, NikolaosKourakos
more...
No comment yet.