Search Results

10 | 25 | 50 | 100 items per page

1,085 results

Video / Animation

The Accidental Discovery of LSD

Unlike its name, Bicycle Day is not a holiday honoring your favorite two-wheeled, environmentally friendly vehicle. This holiday celebrates the day chemist Albert Hofmann first discovered the psychedelic effects of lysergic acid diethylamide,…

Video / Animation

Are We Running Out of Vanilla?

Vanilla is a flavor so common that some people use it as an adjective to describe something plain or ordinary. But watch out! This beloved, flavorful bean may soon become a rarity. Credit: Reactions/American Chemical Society

Video / Animation

Chemistry Life Hacks (Volume 2)

This video contains chemistry-fueled solutions for everyday problems, such as spotting rotten eggs, reviving soggy green vegetables, and fixing busted buttons. [Credit: Reactions/American Chemical Society (www.youtube.com/acsreactions)]

Video / Animation

The Chemistry of Allspice

This video examines the science behind the most misunderstood spice in the world: allspice. [Credit: Reactions/American Chemical Society (www.youtube.com/acsreactions)]

Video / Animation

The Chemistry of Pepper

Pepper is one of the most common condiments in the world today, but it used to be more valuable than gold. This video examines how pepper's delectable chemistry made it a key player in the global spice trade. [Credit: Reactions/American…

Video / Animation

The Chemistry of Poison Ivy

What happens when you get covered in poison ivy and you cannot stop scratching? Jennifer Novotney, winner of the 2014 Chemistry Champions science communications competition, breaks down what it is about that dreaded vine that makes us so…

Video / Animation

Coffee Chemistry

It’s one of the most popular beverages in the world, and many of us rely on it to stay awake every day. But not every cup of coffee is created equal. From the bean to the brew, science can help you get the perfect cup. This video goes on a…

Video / Animation

Facts About Ringworm

This video explores what ringworm is, how to avoid contracting the infection, and—if you do—how to get rid of it. Credit: Reactions/American Chemical Society

Video / Animation

GMO Regulation in America

Most scientists say genetically modified foods are safe to consume, but critics are fiercely opposed to GMOs. The U.S. has several federal agencies that regulate GMOs. Where do those agencies stand? In the era of CRISPR gene-editing…

Video / Animation

How to Make Flowers Last Longer

Some special occasions call for flowers. After a few days, though, that beautiful bouquet may start wilting. This video has picked out the best science-backed tips to maximize the freshness of cut flowers. Credit: Reactions/American…

Video / Animation

How to Make Fluorescent Flowers

Do you have a special someone you want to impress? This video might help. Learn how to turn white flowers into fluorescent masterpieces. Credit: Reactions/American Chemical Society

Video / Animation

How to Make Tomatoes Taste Awesome Again

Supermarket tomatoes account for nearly 10 percent of produce sales in the U.S. So why do most store-bought tomatoes taste terrible? Is there a way to make tomatoes taste great again? This video may have the answer. Credit:…

Video / Animation

Innovative Ways to Fight Climate Change

This video examines some novel proposals for combating climate change—including space mirrors, seeding the ocean with iron, and feeding cows seaweed. In reality, these ideas may or may not be feasible, but they are all supported by valid…

Video / Animation

Milk Chocolate Versus Dark Chocolate

For all you chocolate lovers out there, this video puts dark and milk chocolate together in a faceoff. Which of these deliciously and potentially healthful treats will come out as the greatest? Watch them fight it out in four rounds.…

Video / Animation

Phloem Loading

This animation explains how carbohydratesare loaded into the vascular tissue called phloem for distribution throughout living plants.

Video / Animation

Root Nodule Formation

This animation shows root nodule formation, a complex process in leguminous plants that supports symbiosis with nitrogen-fixing bacteria.

Video / Animation

The Scent of Catnip

Most cats love catnip, but that’s not why this flowering plant produces its volatile oils. The scent of catnip is actually an application of "the enemy of my enemy is my friend" strategy. Find out exactly what that means in this video.…

Video / Animation

The Scent of Freshly Cut Grass May Be a Distress Signal

The scent of freshly cut grass may actually be a chemical cry for help. This video explains how plants communicate, their chemical response to being damaged, and how insects play a role. Credit: Reactions/American Chemical Society

Video / Animation

The Smell of Durian Explained

Durian is known as the king of fruits in southeast Asia, but it’s also banned from many public spaces due to its powerful odor. This video explains the unique chemistry behind durian, and catches some participants at PBS Digital Studios…

Video / Animation

The Spacefaring Power of Urine

Getting to Mars is on some people's minds here on Earth. When it comes to space travel, recycling is a space traveler's best friend, urine included. This video looks at a brilliant new potential use for urine in space. It flows a bit farther…

Video / Animation

The Truth About Wasabi

Do you love a spicy wasabi kick to accompany your raw fish? Well, you’ve probably never tasted real wasabi. As Sarah Everts explains, unless you’ve had a sushi chef grate an expensive wasabi stem straight onto your plate, you’ve probably not…

Video / Animation

The Universe in a Cup of Coffee

This video does a deep dive on the surprisingly complex chemistry behind many people's favorite morning beverage: coffee. The chemistry of the universe is, in a way, in your morning cup of coffee—from the evolution of caffeine as a defensive…

Video / Animation

Vertical Farming

There’s a new trend in agriculture called vertical farming. When humans first learned to farm, we arranged plants outside in horizontal fields, and then invented irrigation and fertilizers to grow crops. But with modern technology and…

Video / Animation

What If Humans Could Photosynthesize?

The Sun shines a massive amount of energy onto the Earth’s surface every day. What if humans could take a cue from plants, and use sunlight to make their own food? From chloroplasts to carbon dioxide, this video creates a hypothetical…

Video / Animation

Why Do Leaves Change Color?

The telltale signs of autumn include crisp weather, pumpkins, and the changing colors of leaves. Do you ever wonder why some leaves turn red, others turn yellow, and some just turn brown? This video explains how chlorophyll and the glucose…

Video / Animation

Why Do Roses Smell So Sweet?

Roses are among the world's most fragrant flowers, but did you know that one minor chemical change would make a rose smell less sweet? Chemist Raychelle Burks, Ph.D., explains why in this video. [Credit: Reactions/American Chemical Society…

Image

from article Polypodiales

Licorice fern (Polypodium glycyrrhiza), a member of the order Polypodiales, in Olympic National Forest, Washington. (Photo courtesy of the U.S. Department of Agriculture, Forest Service)

Image

from article Polypodiales

Christmas fern (Polystichum acrostichoides). (Photo by James H. Miller, U.S. Department of Agriculture, Forest Service)

Image

from article Polypodiales

The sensitive fern (Onoclea sensibilis), a representative of the Polypodiales. (After W. W. Robbins, T. E. Weier, and C. R. Stocking, Botany: An Introduction to Plant Science, 3d ed., Wiley, New York, 1964)

Image

from article Polypodiales

Types of steles in the Polypodiales: (a) Protostele. (b) Amphiphloic siphonostele. (c) Ectophloic siphonostele. (d) Dictyostele with central pith surrounded by xylem and phloem in the form of discrete vascular bundles; bands of parenchyma cells…

Image

from article Polypodiales

Life history of a fern: (1) the fern plant, or sporophyte, bearing sori, or clusters of sporangia, on its leaves; (2) a sporangium; (3) a tetrad of young spores; (4) the four mature spores that have come from the tetrad shown in part 3; (5) a spore…

Image

from article Polypodiales

Diagram of section through a fern leaf, showing details of a sorus. (After W. W. Robbins, T. E. Weier, and C. R. Stocking, Botany: An Introduction to Plant Science, 3d ed., Wiley, New York, 1964)

Image

from article Polypodiales

Eastern marsh fern (Thelypteris palustris): sori on the pinnules of a fertile frond. (Photo by Rob Routledge, Sault College, Sault Ste. Marie, Ontario, Canada)

Image

from article Polypodiales

Diagram of a fern prothallium. (After W. W. Robbins, T. E. Weier, and C. R. Stocking, Botany: An Introduction to Plant Science, 3d ed., Wiley, New York, 1964)

Image

from article Yeast

Colorized scanning electron micrograph (SEM) of Schizosaccharomyces pombe yeast. This single-celled fungus is studied widely as a model organism for eukaryotic cell division. It is a rod-shaped yeast that grows by elongation at its ends, and it…

Image

from article Yeast

Cell shapes of yeasts are extremely varied: (a) rectangular; (b) pear-shaped; (c) apiculate; (d) ogival; (e) spherical; (f) globose; (g) ellipsoidal (oval); (h) elongate; (i) tetrahedral.

Image

from article Yeast

Colorized scanning electron micrograph (SEM) of cells of brewer's yeast (Saccharomyces cerevisiae). This yeast consists of single vegetative cells. Small daughter cells can be seen budding off from the larger cells. Saccharomyces cerevisiae ferments…

Image

from article Yeast

Yeast mycelia. (a) A true septate mycelium showing a break to form an arthrospore. (b) A pseudomycelium.

Image

from article Yeast

Heterothallic (bifactorial) life cycle of a basidiomycetous yeast, Leucosporidium scottii.

Image

from article Yeast

A fluorescent antibody stain reveals the oval budding yeast cells of Candida albicans. This yeast is the most common human fungal pathogen. (Credit: Maxine Jalbert and Leo Kaufman/Centers for Disease Control and Prevention)

Image

from article Cabbage

Cabbage (Brassica oleracea var. capitata). (Joseph Harris Co., Inc., Rochester, New York)

Image

from article Lycopsida

Lycopodium clavatum, a representative homosporous lycopsid. (a) Sporophyte showing typical rhizomatous growth and paired cones. (b) Microphyllous leaf. (c) Sporophyll bearing a sporangium on the upper surface. (From K. R. Sporne, The Morphology of…

Image

from article Ethylene

Structure of ethylene. (Black = carbon. White = hydrogen)

Image

from article Papaverales

Close-up view of an ornamental poppy flower (Papaver orientale; Oriental poppy) belonging to the family Papaveraceae in the order Papaverales. (Photo by Howard F. Schwartz, Colorado State University)

Image

from article Plant evolution

Image

from article Plant evolution

Horsetails (genus Equisetum) are primitive vascular plants. Often referred to as living fossils, horsetails typically grow in wet areas, with whorls of needlelike branches radiating at regular intervals from a single vertical stem. (Credit: Richard…

Image

from article Plant evolution

Two ancient tree leaf fossils embedded in stone. (Credit: Wong Hock Weng/123RF)

Image

from article Plant growth

Image

from article Plant growth

Light micrograph of a plant root tip (meristem) showing the growth of new cells. (Credit: Zoonar GmbH/Alamy Stock Photo)

Image

from article Plant growth

Graphs showing sigmoid growth curves. (a) Growth in height (cm) of a sunflower stem. (b) Growth of an entire corn plant as measured by an increase in dry weight (grams). (Copyright © McGraw-Hill Education)

Image

from article Plant growth

Image

from article Plant growth

Image

from article Plant growth

The apex of a tomato plant showing the localization of PIN proteins as detected by fluorescence microscopy (arrows). Via the presence of the PIN proteins, auxin accumulates at the locations where leaf branching is occurring or about to occur in the…

Image

from article Plant growth

The regulation of flower initiation by photoperiod in the long-day plant, Arabidopsis. Under long days, CO (Constans) protein formation in the leaves induces the biosynthesis of FT (Flowering locus T) protein, which constitutes the floral signal,…

Image

from article Sisal

Sisal (Agave sisalana). (Photo courtesy of Peter Lapshin)

Image

from article Sundew

Spoonleaf sundew (Drosera intermedia). (Photo by Robert H. Mohlenbrock, U.S. Department of Agriculture–Natural Resources Conservation Service PLANTS Database)

Image

from article Cowpea

Cowpea (Vigna unguiculata): pods and leaves. (Photo by Howard F. Schwartz, Colorado State University)

Image

from article Cowpea

Cowpea seeds, which are often called black-eyed peas. (Photo by Joseph Berger; Bugwood.org)

Image

from article Beech

Leaf on top of bark of American beech (Fagus grandifolia). (Photo courtesy of Robert H. Mohlenbrock, USDA–NRCS PLANTS Database)

Image

from article Beech

Beechnuts of the American beech (Fagusgrandifolia). (Photo courtesy of Steve Hurst, USDA–NRCS PLANTS Database)

Image

from article Marjoram

Close-up view of marjoram (Majorana hortensis; alternatively Origanum majorana). (Photo courtesy of Forest and Kim Starr)

Image

from article Chestnut

American chestnut (Castanea dentata). (Photo courtesy of Forest and Kim Starr)

Image

from article Chestnut

Nuts of the Allegheny chinquapin (Castanea pumila). (Photo courtesy of Steve Hurst, USDA–NRCS PLANTS Database)

Image

from article Malvales

Close-up view of a blooming Hibiscus flower. (Photo by Howard F. Schwartz, Colorado State University)

Image

from article Dallis grass

Dallis grass (Paspalum dilatatum). (Photo courtesy of Larry Allain, USGS National Wetlands Research Center)

Image

from article Lichens

The ascolichen Teloschistes chrysophthalmus. (Credit: Jason Hollinger)

Image

from article Lichens

Cuplike lichens of the genus Cladonia. (Credit: Jacinta Lluch Valero)

Image

from article Ebony

Persimmon (Diospyros virginiana). (Photograph by Dot Paul, National Resources Conservation Service, USDA)

Image

from article Wheat

A sheaf of wheat (Triticum) surrounded by some small piles of seed (grain). (Credit: Scott Bauer/Agricultural Research Service, U.S. Department of Agriculture)

Image

from article Wheat

A combined harvester-thresher is used to harvest wheat. (Credit: Scott Bauer/Agricultural Research Service, U.S. Department of Agriculture)

Image

from article Wheat

Adaptation regions for wheat in the United States. (Credit: U.S. Department of Agriculture)

Image

from article Wheat

Wheat (Triticum) growing in a field. The wheat inflorescence is a spike bearing sessile spikelets arranged alternately on a zigzag rachis (main axis). (Credit: Tim McCabe/Natural Resources Conservation Service, U.S. Department of Agriculture)

Image

from article Wheat

Black stem rust of wheat, which produces urediniospores in reddish-brown pustules. The fungus Puccinia graminis f. sp. tritici is responsible for this plant disease. The inset shows a close-up view of an infected stem. (Credit: Agricultural Research…

Image

from article Wheat

Loose smut of wheat, caused by Ustilago tritici. (Credit: Erik Stromberg/Virginia Polytechnic Institute and State University)

Image

from article Apical dominance

Model of strigolactone production. Auxin promotes genes (listed below the arrow) required for strigolactone biosynthesis. This can occur in roots and shoots. Strigolactones move into the bud region and are perceived by the F-box response protein,…

Image

from article Apical dominance

Simplified view of the interaction of three branching hormones. Auxin promotes production of strigolactones (SL), whereas limiting that of cytokinins (CK) at bud nodes. This blocks bud outgrowth in intact plants (left). After decapitation, supply of…

Image

from article Plant phylogeny

A phylogeny of the major groups of plants, showing the history of diversification from a common ancestor (left). The origin of plants in an endosymbiotic event is not depicted, nor are later secondary endosymbiotic events. Major groups are enclosed…

Image

from article Plant phylogeny

Primary and secondary endosymbiotic events in the history of plants. Plants originated in a primary endosymbiotic event, when a prokaryotic photosynthetic cyanobacterial cell was engulfed by a eukaryotic cell and maintained as a plastid. This line…

Image

from article Plant phylogeny

The life cycle of a fern, involving the alternation of sporophyte and gametophyte generations. Reproduction by sporophytes yields gametophytes, and reproduction by gametophytes yields sporophytes. A complete life cycle begins with either a…

Image

from article Tupelo

Leaves of black tupelo (Nyssa sylvatica). (Photograph courtesy of Larry Allain, USGS National Wetlands Research Center)

Image

from article Kentucky coffee tree

Seeds of the Kentucky coffee tree (Gymnocladus dioica). (Photo courtesy of Steve Hurst, ARS Systematic Botany and Mycology Laboratory, USDA–NRCS PLANTS Database)

Image

from article Kentucky coffee tree

Kentucky coffee tree (Gymnocladus dioica). (a) Parts of branch showing leaf scars and winter buds. (b) Branch.

Image

from article Lepidodendrales

Reconstructions of tree-sized Carboniferous rhizomorphic tree-lycopsids, illustrating architectural variation. (After R. M. Bateman et al., Experimental cladistic analysis of anatomically preserved arborescent lycopsids from the Carboniferous of…

Image

from article Lepidodendrales

Primitive bisexual cone of the Flemingites type, borne by Paralycopodites, with apically concentrated microsporangia and basally concentrated megasporangia containing several megaspores. (After C. A. Arnold, An Introduction to Paleobotany,…

Image

from article Fungi

Porcini mushrooms (Boletus edulis) are members of the Basidiomycota division of Fungi. (Credit: Digoarpi/Shutterstock)

Image

from article Fungi

Spore types (upper illustrations) and structures of parent mycelia (lower illustrations) in fungi.

Image

from article Fungi

Image

from article Fungi

Sexual mechanisms in fungi: (a) gametic copulation; (b) gametangial copulation; (c) gamete-gametangial copulation; and (d) somatic copulation.

Image

from article Fungi

Colorized scanning electron micrograph of brewer's yeast cells (Saccharomyces cerevisiae). This fungus consists of single vegetative cells, and small daughter cells can be seen budding off from the larger cells. Brewer's yeast is used in the…

Image

from article Apple

Empire apple (Malus pumila). (Credit: Peggy Greb, Agricultural Research Service, United States Department of Agriculture)

Image

from article Apple

Apple trees in an orchard in late autumn. (Credit: Sandrine Bouvier/Alamy)

Image

from article Pericycle

Pericycles. (a) Part of transection of root Actaea alba, including xylem and phloem. Pericycle thin-walled and one cell in radial dimension. (b) Part of transection of root of Smilax herbacea, including phloem. Pericycle thick-walled and four or…

Image

from article Pericycle

Transection of central part of sugarbeet. (After K. Esau, Hilgardia, 9(8), 1935)

Image

from article Wood anatomy

Annual tree rings are distinct features of wood anatomy. The combined concentric bands of light and dark areas can help investigators to determine the age of a tree. (Credit: DrimaFilm/Shutterstock)

Image

from article Wood anatomy

Light micrograph of a section through the stem of a lime tree (genus Tilia). The pith is at the center and is surrounded by a layer of wood (xylem). A thin cambium separates this from the phloem. An outer layer of collenchyma is enclosed by the…

Image

from article Wood anatomy

Structure of a typical hardwood. (Credit: U.S. Department of Agriculture)

Image

from article Wood anatomy

Structure of a typical softwood. (Credit: U.S. Department of Agriculture)

Image

from article Arales

Anthurium andraeanum (flamingo lily). (Photo courtesy of Forest and Kim Starr)

Image

from article Potato, Irish

Irish potato (Solanum tuberosum). (Photo by Peggy Greb, Agricultural Research Service, U.S. Department of Agriculture)

Image

from article Potato, Irish

Diagram of a potato plant. [Adapted from R. E. Thornton and J. B. Sieczka (eds.), Commercial Potato Production in North America, Potato Association of America, Orono, ME, 1980]

10 | 25 | 50 | 100 items per page

Search Site Content

Browse Articles...

Search Results

Refine this search

1,085 results

The Accidental Discovery of LSD

Are We Running Out of Vanilla?

Chemistry Life Hacks (Volume 2)

The Chemistry of Allspice

The Chemistry of Pepper

The Chemistry of Poison Ivy

Coffee Chemistry

Facts About Ringworm

GMO Regulation in America

How to Make Flowers Last Longer

How to Make Fluorescent Flowers

How to Make Tomatoes Taste Awesome Again

Innovative Ways to Fight Climate Change

Milk Chocolate Versus Dark Chocolate

Phloem Loading

Root Nodule Formation

The Scent of Catnip

The Scent of Freshly Cut Grass May Be a Distress Signal

The Smell of Durian Explained

The Spacefaring Power of Urine

The Truth About Wasabi

The Universe in a Cup of Coffee

Vertical Farming

What If Humans Could Photosynthesize?

Why Do Leaves Change Color?

Why Do Roses Smell So Sweet?

Learn more about AccessScience

Search Site Content

Refine this search

Search result paging links

1,085 results

Learn more about AccessScience

Topics