Results 111 to 120 of about 210,769 (310)

Une collection composite : l’herbier neuchâtelois de Jean-Jacques Rousseau

open access: yesArts et Savoirs
The herbarium held at the Bibliothèque publique et universitaire de Neuchâtel (BPUN) is one of Jean-Jacques Rousseau’s most complex botanical collections.
Pierre-Emmanuel DuPasquier   +1 more
doaj   +1 more source

Seeds of change: The impact of Ethiopia's direct seed marketing approach on smallholders' seed purchases and productivity

open access: yesAmerican Journal of Agricultural Economics, EarlyView.
Abstract While multiple factors explain low adoption rates of improved varieties by small‐scale farmers in sub‐Saharan Africa, a key supply‐side constraint is the limited availability of seed embodying new traits in the volume, quality, price, and timeliness required by farmers. This constraint is partly attributable to classical failures in the market
Dawit Mekonnen   +5 more
wiley   +1 more source

Stereoselective Biotransformation: Transfer of Learning to Advance Drug Metabolism and Biocatalysis

open access: yesAngewandte Chemie, EarlyView.
Understanding stereoselective biotransformations has implications for predicting drug disposition and response and may also inspire novel biocatalytic and biomimetic strategies to address challenges in metabolite and API synthesis. ABSTRACT Chirality is an important determinant of drug action, as enantiomers can exhibit markedly different ...
Grace A. Okunlola, Godwin A. Aleku
wiley   +2 more sources

Crops gone wild: evolution of weeds and invasives from domesticated ancestors. [PDF]

open access: yes, 2010
The evolution of problematic plants, both weeds and invasives, is a topic of increasing interest. Plants that have evolved from domesticated ancestors have certain advantages for study.
Burger, Jutta C   +7 more
core  

Climate change and perennial crop production: Evidence of yield impact and adaptation in California

open access: yesAmerican Journal of Agricultural Economics, EarlyView.
Abstract Perennial crops are economically important. They contribute to food security, providing essential nutrients that are often lacking in annual crops, and provide additional environmental benefits compared with annual crops. Despite their importance, empirical research on the impacts of climate change and adaptation on perennial crops remains ...
Yuanyuan Wen   +2 more
wiley   +1 more source

Johannes Fåhraeus, Amsterdam merchant and representative of the Swedish naturalist Carl Peter Thunberg

open access: yesSjuttonhundratal
The development of science in the seventeenth and eighteenth century is marked by the exchange of ideas and research results on a transnational scale. This led to an extensive exchange of letters and – in the case of natural history – of materials such ...
Willem-Jan Grondelle, Els Vermij
doaj   +1 more source

A Field Guide for Grasses and Grass-like Plants of Idaho [PDF]

open access: yes, 2015
The purpose of this project is to develop a user-friendly field guide to grasses and grass-like plants in Idaho, specifically geared to those with limited background in botany. The guide will feature 60 Idaho grasses and grass-like plants, intended for K-
Strand, Eva K, (Mentor)   +1 more
core   +1 more source

Evaluating the African arid corridor hypothesis: A meta‐analysis including the phylogenetic and biogeographical history of Sesamothamnus

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise We examined the African arid corridor (AAC) disjunction pattern of vascular plants between northeastern and southwestern Africa in the context of geological and climatic events since the late Miocene. We developed a phylogenetic and biogeographical framework for the arid‐adapted genus Sesamothamnus (Pedaliaceae), a classic example of ...
John G. Zaborsky   +6 more
wiley   +1 more source

Unknown materials of Józef Rostafiński concerning studies of the history of cultivated plants in Poland [PDF]

open access: yes, 1987
In 1883 Józef Rostafiński distributed a questionnaire in order to collect the local names which were in use for cultivated plants in the territory of Poland.
Köhler, Piotr
core  

Ecological niche modeling reveals habitat differentiation and climatic vulnerability in two imperiled, sympatric southern Appalachian carnivorous plants

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Understanding the habitat requirements of imperiled flora is critical for informing ex situ conservation practices, designing effective reintroduction strategies, and understanding how climate change will impact such species, especially in montane regions with high levels of environmental heterogeneity. In southern Appalachia, USA, the
Nicholas J. Chang   +6 more
wiley   +1 more source

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