nat

Folding of fluorinated oligoarylenes into non-alternant PAHs with various topological shapes

Org. Chem. Front., 2020, Advance Article
DOI: 10.1039/D0QO00370K, Research Article
Vladimir Akhmetov, Andreas Förtsch, Mikhail Feofanov, Sergey Troyanov, Konstantin Amsharov
An unprecedented [6]helicene's cavity closure indicating the possibility of introducing seven-membered rings via alumina-mediated C–F activation is shown.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

Access to cyano-substituted pyrazolines through copper-catalyzed cascade cyanation/cyclization of unactivated olefins

Org. Chem. Front., 2020, Advance Article
DOI: 10.1039/D0QO00282H, Research Article
Fei Meng, Qin Fang, Weidong Yuan, Ning Xu, Shujun Cao, Jianlin Chun, Jie Li, Honglin Zhang, Yingguang Zhu
A mild copper-catalyzed cascade cyanation/cyclization of hydrazone-tethered unactivated olefins was developed for the efficient and practical synthesis of cyano-containing pyrazolines.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

Turn-on fluorescence sensors based on dynamic intramolecular N→B-coordination

Org. Chem. Front., 2020, Advance Article
DOI: 10.1039/D0QO00267D, Research Article
Raphael Koch, Yu Sun, Andreas Orthaber, Antonio J. Pierik, Frank Pammer
A series of ten aryl-triazole-functionalized boranes bearing BMes2-groups and capable of forming intramolecular five-membered N→B-coordinated heterocycles, has been prepared by 1,3-dipolar cycloaddition.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

Ag2O-catalysed nucleophilic isocyanation: selective formation of less-stable benzylic isonitriles

Org. Chem. Front., 2020, Advance Article
DOI: 10.1039/D0QO00336K, Research Article
Taiga Yurino, Yuji Tange, Ryutaro Tani, Takeshi Ohkuma
Both primary and secondary benzylic isonitriles were exclusively produced by the Ag2O-catalysed reaction of benzylic phosphates and trimethylsilyl cyanide without formation of the thermodynamically favoured regioisomers, benzylic nitriles.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

Discrete boronate ester ladders from the dynamic covalent self-assembly of oligo(phenylene ethynylene) derivatives and phenylenebis(boronic acid)

Org. Chem. Front., 2020, 7,1082-1094
DOI: 10.1039/D0QO00083C, Research Article
Vasileios Drogkaris, Brian H. Northrop
Reversible boronate ester chemistry enables the controlled, dynamic self-assembly of olig(phenylene ethynylene)s into highly conjugated ladder frameworks.
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

Differential formation of nitrogen-centered radicals leading to unprecedented, regioselective bromination of N,N'-(1,2-phenylene)bisamides and 2-amidophenols

Org. Chem. Front., 2020, 7,1095-1106
DOI: 10.1039/C9QO01508F, Research Article
Damoder Reddy Motati, Dilipkumar Uredi, Amarender Goud Burra, J. Phillip Bowen, Frank R. Fronczek, Clint R. Smith, E. Blake Watkins
A highly efficient, site-selective, visible light-accelerated, remote C–H halogenation of unsymmetrical aromatic bisamides/amidoesters has been developed.
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

Toward C2-nitrogenated chromones by copper-catalyzed β-C(sp2)–H N-heteroarylation of enaminones

Org. Chem. Front., 2020, 7,1107-1112
DOI: 10.1039/D0QO00065E, Research Article
Tian Luo, Jie-Ping Wan, Yunyun Liu
The synthesis of C2-nitrogenated chromones has been performed via reactions of enaminones and nitrogen nucleophiles based on an unconventional β-C–H bond functionalization and a featured chromone annulation of enaminones.
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

Phosphine/Palladium Cooperative Catalysis: Enantioselective [5+4] Annulations of ortho-Quinone Methides and Vinylethylene Carbonates

Org. Chem. Front., 2020, Accepted Manuscript
DOI: 10.1039/D0QO00128G, Research Article
Chao Xia, Dong-Chao Wang, Gui-Rong Qu, Hai-Ming Guo
Highly enantioselective [5+4] annulations of ortho-quinone methides with vinylethylene carbonates were enabled by phosphine/palladium asymmetric cooperative catalysis for the first time. Efficient synthesis of various nine-membered benzo-heterocycles was achieved in...
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

Mechanism and Origins of Stereo- and Enantioselectivities of Palladium-Catalyzed Hydroamination of Racemic Internal Allenes via Dynamic Kinetic Resolution: A Computational Study

Org. Chem. Front., 2020, Accepted Manuscript
DOI: 10.1039/D0QO00174K, Research Article
Zhenzhen Wu, Mei Zhang, Yu Shi, Genping Huang
Density functional theory calculations have been performed to investigate the Pd-catalyzed hydroamination of racemic internal allenes with pyrazoles. The computations show that the originally proposed reaction mechanisms initiated by the...
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

Nanotechnology : science and computation / Junghuei Chen, Natasa Jonoska, Grzegorz Rozenberg (eds.)




nat

Nanoscale devices : fundamentals and applications / edited by Rudolf Gross, Anatolie Sidorenko and Lenar Tagirov

NATO Advanced Research Workshop on Nanoscale Devices - Fundamentals and Applications (2004 : Kishinev, Moldova)




nat

Nanotechnology for a sustainable world : global artificial photosynthesis as nanotechnology's moral culmination / T. Faunce

Faunce, T




nat

Our nanotechnology future / Christian Ngô and Joseph B. Natowitz

Ngô, Christian, author




nat

[ASAP] Stereodivergent Asymmetric Synthesis of a,ß-Disubstituted ß-Aminoalkylboronic Acid Derivatives via Group-Selective Protodeboronation Enabling Access to the Elusive Anti Isomer

Journal of the American Chemical Society
DOI: 10.1021/jacs.0c03207




nat

[ASAP] Construction of s-Aromatic AlB<sub>2</sub> Ring via Borane Coupling with a Dicoordinate Cyclic (Alkyl)(Amino)Aluminyl Anion

Journal of the American Chemical Society
DOI: 10.1021/jacs.0c03179




nat

[ASAP] Transformation Network Culminating in a Heteroleptic Cd<sub>6</sub>L<sub>6</sub>L'<sub>2</sub> Twisted Trigonal Prism

Journal of the American Chemical Society
DOI: 10.1021/jacs.0c03798




nat

[ASAP] The First Quantitative Synthesis of a Closed Three-Link Chain (6<sub arrange="stack">1</sub><sup arrange="stack">3</sup>) Using Coordination and Noncovalent Interactions-Driven Self-Assembly

Journal of the American Chemical Society
DOI: 10.1021/jacs.0c01406




nat

[ASAP] Nucleophilic (Radio)Fluorination of Redox-Active Esters via Radical-Polar Crossover Enabled by Photoredox Catalysis

Journal of the American Chemical Society
DOI: 10.1021/jacs.0c03125




nat

Modern Synthetic Methodologies for Creating Drugs and Functional Materials (MOSM2018): proceedings of the II International Conference: conference date, 15-17 November 2018: location, Yekaterinburg, Russia / editors, Grigory V. Zyryanov, Sougata Santra and

Online Resource




nat

Prospects of Renewable Bioprocessing in Future Energy Systems / editors, Ali Asghar Rastegari, Ajar Nath Yadav and Arti Gupta

Online Resource




nat

NATURAL HISTORY OF BEER.

Hayden Library - TP577.D48 2019




nat

Fuel property estimation and combustion process characterization: conventional fuels, biomass, biocarbon, waste fuels, refuse derived fuel, and other alternative fuels / Yen-Hsiung Kiang

Online Resource




nat

Plastics handbook: the resource for plastics engineers / Erwin Baur, Tim A. Osswald, Natalie Rudolph

Online Resource




nat

Wine Tourism Destination Management and Marketing: Theory and Cases / Marianna Sigala, Richard N.S. Robinson, editors

Online Resource




nat

Superplasticizers and other chemical admixtures in concrete: proceedings of the twelfth international conference, Beijing, China, October 28-31, 2018 / editors, Jiaping Liu, Ziming Wang, Terence C. Holland, Jing Huang, Johann Plank

Barker Library - TP884.A3 I68 2018




nat

2018 AIChE Spring Meeting & 14th Global Congress on Process Safety: 33rd Center for Chemical Process Safety International Conference (CCPS) / American Institute of Chemical Engineers

Online Resource




nat

Supercritical antisolvent precipitation process: fundamentals, applications and perspectives / Diego T. Santos, Ádina L. Santana, M. Angela A. Meireles, Ademir José Petenate, Eric Keven Silva, Juliana Q. Albarelli, Júlio C. F. Johner, M.The

Online Resource




nat

Re-creating nature: science, technology, and human values in the twenty-first century / James T. Bradley

Hayden Library - TP248.2.B73 2019




nat

Mitigating contamination from food processing / edited by Catherine S. Birch and Graham A. Bonwick

Online Resource




nat

Advances in feedstock conversion technologies for alternative fuels and bioproducts: new technologies, challenges and opportunities / edited by Majid Hosseini

Online Resource




nat

Biofuels: alternative feedstocks and conversion processes for the production of liquid and gaseous biofuels / edited by Ashok Pandey, Christian Larroche, Claude-Gilles Dussap, Edgard Gnansounou, Samir Kumar Khanal, Steve Ricke

Online Resource




nat

New trends in natural dyes for textiles / Padma Shree Vankar, Dhara Shukla

Online Resource




nat

The polemic of the Pastorals : a sociological examination of the development of Pauline Christianity / Lloyd K. Pietersen

Pietersen, Lloyd, author




nat

Resurrection in retrospect : a critical examination of the theology of N.T. Wright / Peter Carnley

Carnley, Peter, author




nat

Bible nation : the United States of Hobby Lobby / Candida R. Moss and Joel S. Baden

Moss, Candida R., author




nat

Visions of the Apocalypse : receptions of John's revelation in western imagination / Bruce Chilton

Chilton, Bruce




nat

From every people and nation : the book of Revelation in intercultural perspective / edited by David Rhoads




nat

Jesus beyond nationalism : constructing the historical Jesus in a period of cultural complexity / edited by Halvor Moxnes, Ward Blanton and James G. Crossley




nat

Night comes : death, imagination, and the last things / Dale C. Allison Jr

Allison, Dale C., Jr., 1955- author




nat

Signs, wonders, and gifts : divination in the letters of Paul / Jennifer Eyl

Eyl, Jennifer, author




nat

History and eschatology : Jesus and the promise of natural theology / N.T. Wright

Wright, N. T. (Nicholas Thomas), author




nat

Can Science Resolve the Nature / Nurture Debate?


 
Following centuries of debate about "nature and nurture" the discovery of DNA established the idea that nature (genes) determines who we are, relegating nurture (environment) to icing on the cake.

Since the 1950s, the new science of epigenetics has demonstrated how cellular environments and certain experiences and behaviors influence gene expression at the molecular level, with significant implications for health and wellbeing. To the amazement of

Read More...




nat

Impact of ammonium sulfite-based sequential pretreatment combinations on two distinct saccharifications of wheat straw

RSC Adv., 2020, 10,17129-17142
DOI: 10.1039/D0RA01759K, Paper
Open Access
Guang Yu, Shiyue Liu, Xiaoyan Feng, Yuedong Zhang, Chao Liu, Ya-Jun Liu, Bin Li, Qiu Cui, Hui Peng
The impact of substrate properties on wheat straw sugar release from fungal cellulase and whole cell-based CBS was comparatively investigated.
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

Enhanced photodegradation of diphenhydramine in aqueous solution containing natural sand particles

RSC Adv., 2020, 10,17228-17234
DOI: 10.1039/D0RA02019B, Paper
Open Access
Chunlin Yi, Lihong Song, Qingfeng Wu, Zhaohui Li, Weibin Zhang, Ke Yin
Natural sand particles induced the generation of free radicals under simulated solar irradiation, resulting in the enhanced photodegradation of diphenhydramine.
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

Elimination of humic acid in water: comparison of UV/PDS and UV/PMS

RSC Adv., 2020, 10,17627-17634
DOI: 10.1039/D0RA01787F, Paper
Open Access
Shoufeng Tang, Jiachen Tang, Deling Yuan, Zetao Wang, Yating Zhang, Yandi Rao
In this work, UV-activated persulphate treatment (UV/PDS and UV/PMS) was found to be an effective method for HA removal.
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

Work function modification of PEDOT:PSS by mixing with barium acetylacetonate

RSC Adv., 2020, 10,17673-17680
DOI: 10.1039/D0RA02575E, Paper
Open Access
K. L. Woon, W. S. Wong, N. Chanlek, H. Nakajima, S. Tunmee, V. S. Lee, A. Ariffin, P. Songsiriritthigul
Modification of poly(3,4-ethylenedioxythiophene)polystyrene sulfonate as electron injection layer.
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

Elongated conductive structures in detonation soot of high explosives

RSC Adv., 2020, 10,17620-17626
DOI: 10.1039/D0RA01393E, Paper
Open Access
Nataliya P. Satonkina, Alexander P. Ershov, Alexey O. Kashkarov, Ivan A. Rubtsov
Micrographs of transmission electron microscopy of saved detonation products of benzotrifuroxane at different scales.
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

A highly sensitive, selective and renewable carbon paste electrode based on a unique acyclic diamide ionophore for the potentiometric determination of lead ions in polluted water samples

RSC Adv., 2020, 10,17552-17560
DOI: 10.1039/D0RA01435D, Paper
Open Access
  This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
M. A. Zayed, Walaa H. Mahmoud, Ashraf A. Abbas, Aya E. Ali, Gehad G. Mohamed
Due to the toxicity of lead(II) to all living organisms destroying the central nervous system and leading to circulatory system and brain disorders, the development of effective and selective lead(II) ionophores for its detection is very important.
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

A poly(allylamine hydrochloride)/poly(styrene sulfonate) microcapsule-coated cotton fabric for stimulus-responsive textiles

RSC Adv., 2020, 10,17731-17738
DOI: 10.1039/D0RA02474K, Paper
Open Access
Zhiqi Zhao, Qiujin Li, Jixian Gong, Zheng Li, Jianfei Zhang
This study reports a stimulus-responsive fabric incorporating a combination of microcapsules, containing polyelectrolytes poly(allylamine hydrochloride) (PAH) and poly(styrene sulfonate) sodium salt (PSS), formed via a layer-by-layer (LBL) approach.
The content of this RSS Feed (c) The Royal Society of Chemistry




nat

Anatomy of an HTML5 WordPress theme

This site has been written in HTML5 and used to use WordPress to manage the content. I’ll explain why I used HTML5, describe the structure of the theme templates, and show some of the ways I tried to tame WordPress’s tendency to add mess to the source code.

As this is my personal site I wanted to experiment with using HTML5, CSS3, and WAI-ARIA. All these documents are currently working drafts and subject to change. However, the web documents and applications of the future are going to be written in HTML5 and I wanted to see the benefits of using it to markup static documents. Using CSS 2.1, let alone the CSS3 selectors and properties that some browser vendors have implemented, has many advantages for controlling the presentation of semantically coded documents. For this reason I am not going to avoid using basic CSS 2.1 selectors just to faithfully reproducing this site’s design in IE6. However, I have tried to accommodate IE 7 and IE 8 users by using an HTML5 enabling script so that the new HTML5 elements can be styled in those browsers if users have Javascript enabled.

HTML5 templates

I started with a static prototype of this site developed on my local server. WordPress makes it very easy to create your own templates and, therefore, it is no problem to use HTML5. This theme only has 3 main templates: index, single, and archive. There are of course templates for 404s, attachments, comments, etc., but I won’t discuss them as they are all based on the 3 main templates. All the templates include ARIA roles as an accessibility aide.

The single.php template has this rough structure:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title></title>
  <link rel="stylesheet" href="default.css">
</head>

<body>
  <header role="banner"></header>
  <nav role="navigation"></nav>
  <article role="main">
    <header>
      <time datetime="YYYY-MM-DD"></time>
      <h1></h1>
    </header>
    <footer></footer>
  </article>
  <nav></nav>
  <aside role="complementary"></aside>
  <footer role="contentinfo">
    <small></small>
  </footer>
</body>
</html>

The first line of the document is the HTML5 DOCTYPE. The new <article> element contains the content of each post. The same structure is used for the index.php template except that there are several articles displayed on each page and the ARIA role value of main is not used. In contrast, the archive.php template houses all the article excerpts in a <section> element with the ARIA role of main because the list of archived posts is itself the main content of the document.

A clean theme

WordPress tends to add classes, elements, and other bits of code in certain places. I haven’t used any of the WordPress functions that add class names to the body and to elements wrapping a post and also wanted to avoid cluttering the source code with any other unnecessary markup. This required a bit of fiddling around with the theme’s functions.php file. I’m not a PHP developer so this might not be pretty!

Removing actions from wp_head()

WordPress has a hook called wp_head that sits in the header.php of most themes. To avoid it inserting unwanted code into the <head> of the document I used the remove_action function to disable the functions that were responsible. The following code was added to the functions.php file of my theme:

// Remove links to the extra feeds (e.g. category feeds)
remove_action( 'wp_head', 'feed_links_extra', 3 );
// Remove links to the general feeds (e.g. posts and comments)
remove_action( 'wp_head', 'feed_links', 2 );
// Remove link to the RSD service endpoint, EditURI link
remove_action( 'wp_head', 'rsd_link' );
// Remove link to the Windows Live Writer manifest file
remove_action( 'wp_head', 'wlwmanifest_link' );
// Remove index link
remove_action( 'wp_head', 'index_rel_link' );
// Remove prev link
remove_action( 'wp_head', 'parent_post_rel_link', 10, 0 );
// Remove start link
remove_action( 'wp_head', 'start_post_rel_link', 10, 0 );
// Display relational links for adjacent posts
remove_action( 'wp_head', 'adjacent_posts_rel_link', 10, 0 );
// Remove XHTML generator showing WP version
remove_action( 'wp_head', 'wp_generator' );

Source: WPEngineer.com: Cleanup WordPress Header

Removing an empty <span>

If you want to create excerpts you can either write them into the excerpt box or use the <--more--> quicktag in the WordPress editor. I just wanted the first paragraph of my posts to be used as the excerpt and so using the in-editor tag was the most practical approach I was aware of. However, when you do this WordPress will insert an empty <span> in the post’s content. This element has an id so that the area following the excerpt can be targeted by “more” or “continue reading” links. I removed both the empty <span> and the jump link by adding the following code to the functions.php file of the theme:

// removes empty span
function remove_empty_read_more_span($content) {
  return eregi_replace("(<p><span id="more-[0-9]{1,}"></span></p>)", "", $content);
}
add_filter('the_content', 'remove_empty_read_more_span');

Source: Ganda Manurung: Remove Empty Span Tag On WordPress

// removes url hash to avoid the jump link
function remove_more_jump_link($link) {
  $offset = strpos($link, '#more-');
  if ($offset) {
    $end = strpos($link, '"',$offset);
  }
  if ($end) {
    $link = substr_replace($link, '', $offset, $end-$offset);
  }
  return $link;
}
add_filter('the_content_more_link', 'remove_more_jump_link');

Source: WordPress Codex: Customizing the Read More

Displaying images in the excerpt

For posts that display nothing but a photograph (yes, they will be shit but I’m hoping it gets me using my camera a bit more often) I wanted the image to show up in the archives. Equally, if the first paragraph of a post contained a link I wanted that to be preserved. The default the_excerpt() template tag doesn’t allow for this so it needed some modifying. I added a new function, which is just a modified version of the core excerpt function, to the functions.php file and then made sure that the template tag executed this function rather than the one contained in the core WordPress files.

function improved_trim_excerpt($text) {
   if ( '' == $text ) {
      $text = get_the_content('');
      $text = strip_shortcodes( $text );
      $text = apply_filters('the_content', $text);
      $text = str_replace(']]>', ']]&amp;gt;', $text);
      $text = strip_tags($text, '<p><img><a>');
      $excerpt_length = apply_filters('excerpt_length', 55);
      $words = explode(' ', $text, $excerpt_length + 1);
      if (count($words) > $excerpt_length) {
         array_pop($words);
         array_push($words, '[...]');
         $text = implode(' ', $words);
         $text = force_balance_tags($text);
      }
   }
   return $text;
}
remove_filter('get_the_excerpt', 'wp_trim_excerpt');
add_filter('get_the_excerpt', 'improved_trim_excerpt');

Source: Aaron Russell: Improving WordPress’ the_excerpt() template tag

I prefer not to have empty elements in the markup and so I needed a way to conditionally insert the “Older entries”, “Newer Entries”, etc., links into templates. The solution I’m using here, which isn’t perfect, is to add this to functions.php:

function show_posts_nav() {
  global $wp_query;
  return ($wp_query->max_num_pages > 1);
}

Source: Eric Martin: Conditional navigation links in WordPress

And then to wrap the navigation markup in the templates with the following:

<?php if (show_posts_nav()) : ?>
<nav>
   <ul>
      <li><?php next_posts_link('&#171; Older Entries') ?></li>
      <li><?php previous_posts_link('Newer Entries &#187;') ?></li>
   </ul>
</nav>
<?php endif; ?>

Summary

It’s fairly easy to create a simple site with HTML5 and to use WordPress to deliver it. At the moment there are issues with Internet Explorer because you cannot style HTML5 elements unless you use Javascript. However, HTML5 redefines the meaning of certain elements (such as <dl>, which has become a more versatile “description list”) and allows block elements to be wrapped in a link. Therefore, there is still benefit in using the HTML5 DOCTYPE even if you do not make use of the new elements.

Further reading

  1. HTML5 working draft
  2. HTML5 differences from HTML4
  3. Accessible Rich Internet Applications (WAI-ARIA) 1.0