Stephen A. Bell

ORCID: 0000-0001-9315-724X
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About
Contact & Profiles
Research Areas
  • Ecology and Vegetation Dynamics Studies
  • Botany, Ecology, and Taxonomy Studies
  • Rangeland and Wildlife Management
  • Plant biochemistry and biosynthesis
  • Biological Control of Invasive Species
  • Species Distribution and Climate Change
  • Plant Diversity and Evolution
  • Phenothiazines and Benzothiazines Synthesis and Activities
  • Plant and animal studies
  • Wildlife Ecology and Conservation
  • Pasture and Agricultural Systems
  • Invertebrate Taxonomy and Ecology
  • Microbial Natural Products and Biosynthesis
  • Synthesis and Biological Evaluation
  • Pacific and Southeast Asian Studies
  • Fire effects on ecosystems
  • Environmental Conservation and Management
  • RNA Research and Splicing
  • Quinazolinone synthesis and applications
  • Chemical Synthesis and Analysis
  • Drilling and Well Engineering
  • Synthetic Organic Chemistry Methods
  • Microbial Metabolic Engineering and Bioproduction
  • Protein purification and stability
  • Algal biology and biofuel production

University of Newcastle Australia
2014-2024

Boehringer Ingelheim (United States)
2023

University of Utah
2022

GlaxoSmithKline (United Kingdom)
2017-2018

Timescape Surveys
2018

Royal Botanic Gardens, Kew
2015-2017

University of Kentucky
2010-2016

Royal Botanic Garden Sydney
2015

Royal Botanic Gardens Victoria
2015

Plant (United States)
2010

Marchantia polymorpha is a basal terrestrial land plant, which like most liverworts accumulates structurally diverse terpenes believed to serve in deterring disease and herbivory. Previous studies have suggested that the mevalonate methylerythritol phosphate pathways, present evolutionarily diverged plants, are also operative liverworts. However, genes enzymes responsible for chemical diversity of yet be described. In this study, we resorted HMMER search tool identify 17 putative terpene...

10.1105/tpc.16.00062 article EN The Plant Cell 2016-09-20

Botryococcus braunii race B is a colony-forming, green algae that accumulates triterpene oils in excess of 30% its dry weight. The composition the dominated by dimethylated to tetramethylated forms botryococcene and squalene. Although unusual mechanisms for biosynthesis squalene were recently described, enzyme(s) responsible decorating these scaffolds with methyl substituents unknown. A transcriptome B. was screened computationally assuming methyltransferases (TMTs) might resemble S-adenosyl...

10.1074/jbc.m111.316059 article EN cc-by Journal of Biological Chemistry 2012-01-13

The polyadenylation of RNA is a near-universal feature metabolism in eukaryotes. This process has been studied the model alga Chlamydomonas reinhardtii using low-throughput (gene-by-gene) and high-throughput (transcriptome sequencing) approaches that recovered poly(A)-containing sequence tags which revealed interesting features this critical Chlamydomonas. In study, so-called Poly(A) Tag Sequencing (PAT-Seq) approach. Specifically, PAT-Seq was used to study poly(A) site choice cultures grown...

10.1371/journal.pone.0146107 article EN cc-by PLoS ONE 2016-01-05

Context The endangered ephemeral herb Monotaxis macrophylla (Euphorbiaceae) has limited (~211) records throughout its known range in eastern Australia. In New South Wales (NSW), the 127 occurrences are spread over more than half of state, and for regulatory purposes this led to 262 Plant Community Types (PCTs) being predicted as suitable habitat species BioNet Threatened Biodiversity Data Collection (TBDC). Under Assessment Method currently use NSW, is be specifically addressed any...

10.1071/bt24064 article EN cc-by-nc-nd Australian Journal of Botany 2025-02-20

Iminophosphoranes of the type X(3)P=NR (X = Cl, pyrrolyl; R alkyl, aryl) catalytically metathesize C=N bonds carbodiimides via an addition/elimination mechanism that, despite lack d orbital participation in P-N bonding, conserves key features metal-catalyzed olefin metathesis. Diazaphosphetidine intermediates, produced by formal [2 + 2] addition to P=N bond, have been isolated and characterized. All phosphorus-containing species complex catalytic reaction mixtures identified their origins...

10.1021/ja020494v article EN Journal of the American Chemical Society 2002-08-17

Squalene and botryococcene are branched-chain, triterpene compounds that arise from the head-to-head condensation of two molecules farnesyl diphosphate to yield 1′–1 1′–3 linkages, respectively. The enzymes catalyze their formation have attracted considerable interest medical field as potential drug targets renewable energy sector for metabolic engineering efforts. Recently, responsible squalene biosynthesis in green alga Botryococcus braunii race B were characterized. To better understand...

10.1021/bi501264s article EN Biochemistry 2014-11-13

10.1016/j.bbalip.2016.06.008 article EN Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids 2016-06-15

We report the identification of tnd biosynthetic cluster from marine-derived fungus Aspergillus flavipes and in vivo characterization a cryptic type I diterpene synthase. The heterologous expression bifunctional terpene synthase led to discovery backbone, talarodiene, harboring benzo[a]cyclopenta[d]cyclooctane tricyclic fused ring system. conversion geranylgeranyl diphosphate talarodiene was investigated using 13C-labeling studies, stable isotope tracer experiments showed biotransformation...

10.1021/acs.orglett.2c02904 article EN cc-by-nc-nd Organic Letters 2022-09-20

A solution-phase synthesis and characterization of covalent DNA-dendron conjugates is presented. Thiol-terminated 12-base oligonucleotides were added to second- third-generation triazine-based dendrons via thiol/disulfide exchange chemistry. Single-stranded DNA successfully attached at the core, periphery, both. Proof structure for these architectures derived primarily from mass spectrometry polyacrylamide gel electrophoresis complemented by labeling analysis using Ellman's reagent...

10.1021/bc020075n article EN Bioconjugate Chemistry 2003-03-01

MINT‐7712550: AtCstF77 (uniprotkb:Q8LKG5) binds (MI:0407) to AtCPSF30 (uniprotkb:A9LNK9) by pull down (MI:0096)

10.1016/j.febslet.2010.03.007 article EN FEBS Letters 2010-03-06

Translocation of plants is used globally as a conservation action to bolster existing or establish new populations threatened species and usually communicated in academic publications case studies. also mitigate offset impacts urbanization development but less often publicly published. Irrespective the motivation, mitigation, on ground actions are driven by overriding global goals, applied local national legislation. This paper deconstructs legislative framework which guides translocation...

10.3389/fcosc.2021.789448 article EN cc-by Frontiers in Conservation Science 2022-01-03

Re‐introduction of threatened plants is an emerging tool in biodiversity conservation; however, the efficacy and success translocations vary. This study documents translocation two terrestrial orchid species ( Diuris tricolor , Prasophyllum petilum ) over 8 years within coal mining areas Hunter Valley NSW, Australia. In largest scale known (and only one translocating into mine rehabilitation), six events have progressively re‐located 3,030 mature orchids (1,206 D. 1,824 P. offsets...

10.1111/rec.13224 article EN Restoration Ecology 2020-06-19

Iminophosphorane Cl3PNAr (Ar = 2-fluorophenyl) is an active carbodiimide metathesis catalyst and the cycloaddition product, a 1,3-diaza-2-phosphetidine, intermediate in reaction.

10.1039/b003148h article EN Chemical Communications 2000-01-01

The objective of this study was to improve the solubility and inhibit crystallisation during gastric-to-intestinal transfer Erlotinib (ERL), a small molecule kinase inhibitor (smKI) compound class, which is classified as class II drug in Biopharmaceutical Classification System (BCS). A screening approach combining different parameters (solubility aqueous media, inhibitory effect from supersaturated solutions) applied selected polymers for development solid amorphous dispersions ERL. ERL...

10.1080/10837450.2023.2233612 article EN Pharmaceutical Development and Technology 2023-07-11

Summary Translocation of threatened terrestrial orchids is increasingly seen as a viable ameliorative conservation option when habitat destroyed or modified through changing land use. Most orchid translocations reported in the literature detail nursery‐raised seedlings planted into intact and suitable habitat, few involve translocation entire plants their mycorrhizal fungal associates. As part larger study, soil cores containing 46 individuals Painted Diuris ( tricolor ) were translocated...

10.1111/emr.12473 article EN Ecological Management & Restoration 2021-04-10

Abstract Barite Sag is a reoccurring problem with many oil-based drilling fluids. Attempts to correlate sag tendencies various rheological properties commonly used benchmark fluids have had limited success in prevention and anticipation of problems the field. Herein presented new testing apparatus for dynamic static settling rate (sag) measurements, which has been proven provide better understanding phenomena as well means characterize fluid performance. This greatly expands precision...

10.2118/103088-ms article EN SPE Annual Technical Conference and Exhibition 2006-09-24

A new subspecies of Leionema lamprophyllum, formerly included in L. lamprophyllum subsp. obovatum F.M.Anderson, is here described as new. Currently known from fewer than 50 individuals, the highly restricted and warrants a conservation risk code at least Endangered. An illustration taxon, notes on its distribution habitat, key to all four are also provided.

10.7751/telopea9226 article EN Telopea 2015-12-16

It was my pleasure to attend the conference and meet hear from a range of authoritative, passionate, distinguished plant conservationists.With over 50 presentations in three concurrent sessions, along with keynote address four plenary lectures, three-day packed full information ideas.

10.5962/p.373584 article EN cc-by-nc-sa Australasian Plant Conservation journal of the Australian Network for Plant Conservation 2015-05-01

Upland wetlands, commonly known as hanging swamps, are scattered throughout the Somersby Plateau and depend on groundwater to maintain their floristic diversity.Although such communities limited in areal extent, they provide islands of distinct vegetation assemblages somewhat different surrounding community.While not currently protected legally, these swamps unique ecological communities, providing potential habitat for threatened species regent honeyeater, redcrowned toadlet, Adams emerald...

10.5962/p.375063 article EN cc-by-nc-sa Australasian Plant Conservation journal of the Australian Network for Plant Conservation 2004-01-01

10.5962/p.373120 article EN cc-by-nc-sa Australasian Plant Conservation journal of the Australian Network for Plant Conservation 2007-08-01
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