Title By Description Created Last modifiedsort descending
Organisers and Genes (1940), by Conrad Hal Waddington Adam R. Navis Conrad Hal Waddington's Organisers and Genes, published in 1940, is a summary of available research and theoretical framework for many concepts related to tissue differentiation in the developing embryo. The book is composed of two main conceptual sections. The first section explores the action and nature of the organizer, while the second section delves into genes and their influence on development. 2007-10-30 4 Jul 2018 - 4:40:59am
Serial Cultivation of Human Diploid Cells in the Lab (1958–1961) by Leonard Hayflick and Paul S. Moorhead Christian H. Ross From 1958 to 1961, Leonard Hayflick and Paul Moorhead in the US developed a way in the laboratory to cultivate strains of human cells with complete sets of chromosomes. Previously, scientists could not sustain cell cultures with cells that had two complete sets of chromosomes like normal human cells (diploid). As a result, scientists struggled to study human cell biology because there was not a reliable source of cells that represented diploid human cells. In their experiments, Hayflick and Moorhead created lasting strains of human cells that retained both complete sets of chromosomes. 2017-04-27 4 Jul 2018 - 4:40:59am
Buck v. Bell (1927) Nathalie Antonios, Christina Raup In 1927, the US Supreme Court case Buck v. Bell set the legal precedent that states may sterilize inmates of public institutions because the court argued that imbecility, epilepsy, and feeblemindedness are hereditary, and that the inmates should be prevented from passing these defects to the next generation. On 2 May 1927, in an eight to one decision, the US Supreme Court ordered that Carrie Buck, feebleminded daughter of a feebleminded mother and herself the mother of a feebleminded child, be sterilized under the 1924 Virginia Eugenical Sterilization Act. Buck v. 2012-01-01 4 Jul 2018 - 4:40:59am
Hamburger-Hamilton Staging Series (1951) Maria Doty In 1951 Viktor Hamburger and Howard Hamilton created an embryonic staging series from a combination of photographs and drawings from other researchers. The Hamburger-Hamilton stages are a sequence of images depicting 46 chronological stages in chick development. The images begin with a fertilized egg and end with a fully developed chick. The Hamburger-Hamilton staging series was produced in order to replace a previous chick staging series created in 1900. The earlier attempt lacked specific details and staged the chick embryo by using only morphological characteristics. 2011-06-10 4 Jul 2018 - 4:40:59am
Rosalyn Sussman Yalow (1921-2011) Jennifer R. Craer Rosalyn Sussman Yalow co-developed the radioimmunoassay (RIA), a method used to measure minute biological compounds that cause immune systems to produce antibodies. Yalow and research partner Solomon A. Berson developed the RIA in the early 1950s at the Bronx Veterans Administration (VA) Hospital, in New York City, New York. Yalow and Berson's methods expanded scientific research, particularly in the medical field, and contributed to medical diagnostics. For this achievement, Yalow received the Nobel Prize in Physiology or Medicine in 1977. 2013-09-10 4 Jul 2018 - 4:40:59am
"The Role of Maternal Mitochondria during Oogenesis, Fertilization and Embryogenesis" (2002), by James M. Cummins Dorothy R. Haskett James M Cummins published 'The Role of Maternal Mitochondria during Oogenesis, Fertilization and Embryogenesis' 30 January 2002 in Reproductive BioMedicine Online. In the article, Cummins examines the role of the energy producing cytoplasmic particles, or organelles called mitochondria. Humans inherit mitochondria from their mothers, and mechanisms have evolved to eliminate sperm mitochondria in early embryonic development. Mitochondria contain their own DNA (mtDNA) separate from nuclear DNA (nDNA). 2014-09-19 4 Jul 2018 - 4:40:59am
Early Infantile Autism and the Refrigerator Mother Theory (1943-1970) Sean Cohmer In 1943, child psychiatrist Leo Kanner in the US gave the first account of Early Infantile Autism that encouraged psychiatrists to investigate what they called emotionally cold mothers, or refrigerator mothers. In 1949, Kanner published Problems of Nosology and Psychodynamics of Early Infantile Autism. In that article, Kanner described autistic children as reared in emotional refrigerators. US child psychiatrists claimed that some psychological or behavioral conditions might have origins in emotional or mental stress, meaning that they might be psychogenic. 2014-08-19 4 Jul 2018 - 4:40:59am
In the Womb (2005), by Toby Mcdonald and National Geographic Channel Inbar Maayan Written, produced, and directed by Toby Mcdonald, the 2005 National Geographic Channel film In the Womb uses the most recent technology to provide an intricate glimpse into the prenatal world. The technologies used, which include advanced photography, computer graphics, and 4-D ultrasound imaging, help to realistically illustrate the process of development and to answer questions about the rarely seen development of a human being. 2010-11-20 4 Jul 2018 - 4:40:59am
Isotretinoin (Accutane) as a Teratogen Chanapa Tantibanchachai Isotretinoin is a molecule and a byproduct (metabolite) of vitamin A, and in greater than normal amounts in pregnant women, it can cause fetal abnormalities including cleft lips, ear and eye defects, and mental retardation. Isotretinoin is commonly called by its trade name Accutane, and it's a chemical compound derived from vitamin A, or retinoic acid. Doctors prescribe isotretinoin to treat severe acne. For pregnant women, too much vitamin A or isotretinoin can also cause greater than normal rates of stillbirths and fetal disintegrations after the ninth week of gestation. 2014-07-20 4 Jul 2018 - 4:40:59am
Hermaphrodites and the Medical Invention of Sex (1998), by Alice Domurat Dreger Mary Drago Hermaphrodites and the Medical Invention of Sex, by historian of science Alice Domurat Dreger, was published in 1998 by Harvard University Press. In the book, Dreger describes how many doctors and scientists treated human hermaphrodites from the late nineteenth century to the early twentieth century. She states that during this time period, many physicians and scientists struggled to determine the nature sex, and to support a classification of sex as male or female, many physicians and scientists resorted to viewing a person's gonads for identification of his or her sex. 2014-04-09 4 Jul 2018 - 4:40:59am
City of Akron v. Akron Center for Reproductive Health (1983) Lawton L. Jackson, Lakshmeeramya Malladi In the 1983 case City of Akron v. Akron Center for Reproductive Health the US Supreme Court ruled that certain requirements of the city of Akron’s “Regulation on Abortion” ordinance violated women’s rights to abortions. Despite the legalization of abortion in the 1973, with the US Supreme Court case Roe v. Wade, individual states passed legislation regulating certain aspects of abortion. 2017-11-08 4 Jul 2018 - 4:40:59am
"Derivation of Pluripotent Stem Cells from Cultured Human Primordial Germ Cells" (1998), by John Gearhart et al. Ke Wu In November 1998, two independent reports were published concerning the first isolation of pluripotent human stem cells, one of which was "Derivation of Pluripotent Stem Cells from Cultured Human Primordial Germ Cells." This paper, authored by John D. Gearhart and his research team - Michael J Shamblott, Joyce Axelman, Shunping Wang, Elizabeith M. Bugg, John W. Littlefield, Peter J. Donovan, Paul D. Blumenthal, and George R. Huggins - was published in Proceedings of the National Academy of Science soon after James A. 2010-09-14 4 Jul 2018 - 4:40:59am
Robert Guthrie (1916–1995) Meilin Zhu Robert Guthrie developed a method to test infants for phenylketonuria (PKU) in the United States during the twentieth century. PKU is an inherited condition that causes an amino acid called phenylalanine to build to toxic levels in the blood. Untreated, PKU causes mental disabilities. Before Guthrie’s test, physicians rarely tested infants for PKU and struggled to diagnosis it. Guthrie’s test enabled newborns to be quickly and cheaply screened at birth and then treated for PKU if necessary, preventing irreversible neurological damage. 2017-02-23 4 Jul 2018 - 4:40:59am
Inducing Fertilization and Development in Sand Dollars Karen Wellner Sand dollars are common marine invertebrates in the phylum Echinodermata and share the same class (Echinoidea) as sea urchins. They have served as model laboratory organisms for such embryologists as Frank Rattray Lillie and Ernest Everett Just. Both Lillie and Just used Echinarachnius parma for their studies of egg cell membranes and embryo development at the Marine Biological Laboratory (MBL) at Woods Hole, Massachusetts, in the early 1900s. 2010-06-24 4 Jul 2018 - 4:40:59am
Leonardo da Vinci (1452-1519) Hilary Gilson Leonardo da Vinci was born on 15 April 1452, the illegitimate son of a young peasant girl by the name of Caterina and Ser Piero da Vinci, a well-renowned Florentine notary. Leonardo lived in Italy in the town of Vinci until his late teens and received a simple education in reading and writing as well as some training in mathematics and engineering. Although he was socially excluded by birthright from almost every profession and prohibited from attending any formal university, Leonardo went on to become a celebrated scientist, artist, and engineer. 2008-08-26 4 Jul 2018 - 4:40:59am
De Formatione Ovi et Pulli (1621), by Girolamo Fabrici Hilary Gilson The embryological treatise De formatione ovi et pulli (On the Formation of the Egg and of the Chick) was written by anatomist and embryologist Girolamo Fabrici and published in Padua posthumously in 1621. The book was edited by Joahannes Prevotius and is separated into two parts that describe Fabrici's observations and assumptions on embryology and combine the traditional knowledge of his predecessors with his own first-hand anatomical observations. 2008-09-30 4 Jul 2018 - 4:40:59am
Hedgehog Signaling Pathway Dorothy R. Haskett The hedgehog signaling pathway is a mechanism that directs the development of embryonic cells in animals, from invertebrates to vertebrates. The hedgehog signaling pathway is a system of genes and gene products, mostly proteins, that convert one kind of signal into another, called transduction. In 1980, Christiane Nusslein-Volhard and Eric F. Wieschaus, at the European Molecular Biology Laboratory in Heidelberg, Germany, identified several fruit fly (Drosophila melanogaster) genes. 2015-07-30 4 Jul 2018 - 4:40:59am
Planned Parenthood v. Danforth (1976) Carolina J. Abboud On 1 July 1976, the US Supreme Court decided in the case Planned Parenthood v. Danforth that provisions of a Missouri law regulating abortion care were unconstitutional. That law, House Bill 1211, restricted abortion care by requiring written consent for each abortion procedure from the pregnant woman as written consent of the woman’s husband if she was married, or the written consent of her parents if she was unmarried and younger than eighteen. House Bill 1211 also required that physicians make efforts to preserve the lives of aborted fetuses. 2017-11-15 4 Jul 2018 - 4:40:59am
Diprosopus (Craniofacial Duplication) Corinne DeRuiter Diprosopus is a congenital defect also known as craniofacial duplication. The exact description of diprosopus refers to a fetus with a single trunk, normal limbs, and facial features that are duplicated to a certain degree. A less severe instance is when the nose is duplicated and the eyes are spaced far apart. In the most extreme instances, the entire face is duplicated, hence the name diprosopus, which is Greek for two-faced. Fetuses with diprosopus often also lack brains (anencephaly), have neural tube defects, or heart malformations. 2011-08-16 4 Jul 2018 - 4:40:59am
Nerve Growth Factor Adam R. Navis Nerve growth factor (NGF) is a signaling protein and growth factor implicated in a wide range of development and maintenance functions. NGF was discovered through a series of experiments in the 1950s on the development of the chick nervous system. Since its discovery, NGF has been found to act in a variety of tissues throughout development and adulthood. It has been implicated in immune function, stress response, nerve maintenance, and in neurodegenerative diseases. 2007-10-30 4 Jul 2018 - 4:40:59am
Hartsoeker's Homunculus Sketch from Essai de Dioptrique Cera R. Lawrence This embryology image is a pencil sketch by Nicolaas Hartsoeker, published as part of his 1694 French-language paper entitled Essai de Dioptrique, a semi-speculative work describing the sorts of new scientific observations that could be done using magnifying lenses. Dioptrique was published in Paris by the publishing house of Jean Anisson. The image depicts a curled up infant-like human, now referred to as a homunculus, inside the head of a sperm cell. 2008-08-14 4 Jul 2018 - 4:40:59am
Virginia Apgar (1909-1974) Carolina J. Abboud Virginia Apgar worked as an obstetrical anesthesiologist, administering drugs that reduce women’s pain during childbirth, in the US in the mid-twentieth century. In 1953, Apgar created a scoring system using five easily assessable measurements, including heart rate and breathing rate, to evaluate whether or not infants would benefit from medical attention immediately after birth. Apgar’s system showed that infants who were previously set aside as too sick to survive, despite low Apgar scores, could recover with immediate medical attention. 2017-02-16 4 Jul 2018 - 4:40:59am
The Germ-Plasm: a Theory of Heredity (1893), by August Weismann Yawen Zou Friedrich Leopold August Weismann published Das Keimplasma: eine Theorie der Vererbung (The Germ-Plasm: a Theory of Heredity, hereafter The Germ-Plasm) while working at the University of Freiburg in Freiburg, Germany in 1892. William N. Parker, a professor in the University College of South Wales and Monmouthshire in Cardiff, UK, translated The Germ-Plasm into English in 1893. In The Germ-Plasm, Weismann proposed a theory of heredity based on the concept of the 2015-01-26 4 Jul 2018 - 4:40:59am
Norman Haire (1892-1952) Claudia Nunez-Eddy Norman Haire was a physician who advocated for eugenics, which is the betterment of human population by promoting positive traits, and birth control rights in the twentieth century in both Australia and the UK. In the UK, Haire joined the Malthusian League, a contraception advocacy organization, and helped the League open the first physician-supervised birth control clinic, called Walworth Women’s Welfare Centre in London, England. 2017-04-13 4 Jul 2018 - 4:40:59am
Eisenstadt v. Baird (1972) Sheraden Seward Prior to 1971, women had some difficulty obtaining contraceptive materials due to a law prohibiting the distribution of contraceptives by anyone other than a registered physician or registered pharmacist. This limited access to contraceptives had an impact on women's reproductive rights and it was the Supreme Court case Eisenstadt v. Baird (1972) that helped bring the issue into the public spotlight. It demonstrated that women's bodies have reproductive as well as anatomical functions, and that the right to privacy extends to those reproductive functions. 2008-12-03 4 Jul 2018 - 4:40:59am
45 CFR 46: Protection of Human Subjects under United States Law (1974) Megan Kearl In the United States, the Code of Federal Regulations Title 45: Public Welfare, part 46 (45 CFR 46) provides protection for human subjects in research carried out or supported by most federal departments and agencies. 45 CFR 46 created a common federal policy for the protection of such human subjects that was accepted by the Office of Science and Technology Policy and issued by each of the departments and agencies listed in the document. 2010-06-17 4 Jul 2018 - 4:40:59am
Karl Landsteiner (1868-1943) Corey Harbison Karl Landsteiner studied blood types in Europe and in the United States in the late nineteenth and early twentieth centuries. Landsteiner won the Nobel Prize in Physiology or Medicine in 1930 for detailing immunological reactions in the ABO blood group system. The ABO blood group system divides human blood into one of four types based on the antibodies that are present on each cell. Landsteiner's work with blood types led physicians to safely perform blood transfusions and organ transplants. 2017-02-17 4 Jul 2018 - 4:40:59am
Etienne Geoffroy Saint-Hilaire (1772-1844) Valerie Racine Etienne Geoffroy Saint-Hilaire, commonly known as Geoffroy, studied animals, their anatomy and their embryos, and teratogens at the National Museum of Natural History in Paris, France in the eighteenth and nineteenth centuries. Geoffroy also helped develop several specialized fields in the life sciences, including experimental embryology. In his efforts to experimentally demonstrate the theory of recapitulation, Geoffroy developed techniques to intervene in the growth of embryos to see whether they would develop into different kinds of organisms. 2013-08-05 4 Jul 2018 - 4:40:59am
"Genetic Control of Biochemical Reactions in Neurospora" (1941), by George W. Beadle and Edward L. Tatum Divyash Chhetri George Wells Beadle and Edward Lawrie Tatum's 1941 article Genetic Control of Biochemical Reactions in Neurospora detailed their experiments on how genes regulated chemical reactions, and how the chemical reactions in turn affected development in the organism. Beadle and Tatum experimented on Neurospora, a type of bread mold, and they concluded that mutations to genes affected the enzymes of organisms, a result that biologists later generalized to proteins, not just enzymes. 2014-06-11 4 Jul 2018 - 4:40:59am
The Woman Rebel (1914) Rainey Horwitz In the early twentieth century, birth control advocate Margaret Sanger published eight issues of a feminist magazine called The Woman Rebel. During this time, discussion of sex education, birth control, and abortion were illegal. The magazine featured literary pieces on topics like women’s rights, love and marriage, women in the workplace, reproductive and sexual education, and contraception. The Woman Rebel was one of the first magazines that discussed issues that working class American women faced. Through the 2018-05-16 4 Jul 2018 - 4:40:59am
Pope Pius XII (1876-1958) Katherine Brind'Amour Pope Pius XII was born Eugenio Maria Giuseppi Giovanni Pacelli on 2 March 1876 in Rome, Italy, to Virginia and Filippo Pacelli. Known for his oft-disputed role in the Roman Catholic Church's approach to the Nazis and World War II, Pope Pius XII also contributed a number of important documents regarding conception, fertility, abortion, and reproductive control to the Vatican's collection of writings and doctrine on procreation. 2010-06-10 4 Jul 2018 - 4:40:59am
"Interspecific Chimeras in Mammals: Successful Production of Live Chimeras Between Mus musculus and Mus caroli" (1980), by Janet Rossant and William I. Frels Nicole Newkirk In 1980 Janet Rossant and William I. Frels published their paper, "Interspecific Chimeras in Mammals: Successful Production of Live Chimeras Between Mus musculus and Mus caroli," in Science. Their experiment involved the first successful creation of interspecific mammalian chimeras. Mammalian chimeras are valuable for studying early embryonic development. However, in earlier studies, clonal analysis was restricted by the lack of a cell marker, present at all times, that makes a distinction between the two parental cell types in situ. 2007-10-30 4 Jul 2018 - 4:40:59am
Temperature-Dependent Sex Determination in Reptiles Karla T. Moeller The sex of a reptile embryo partly results from the production of sex hormones during development, and one process to produce those hormones depends on the temperature of the embryo's environment. The production of sex hormones can result solely from genetics or from genetics in combination with the influence of environmental factors. In genotypic sex determination, also called genetic or chromosomal sex determination, an organism's genes determine which hormones are produced. 2013-02-01 4 Jul 2018 - 4:40:59am
Josef Warkany (1902–1992) Bianca Zietal, Chanapa Tantibanchachai Josef Warkany studied the environmental causes of birth defects in the United States in the twentieth century. Warkany was one of the first researchers to show that factors in the environment could cause birth defects, and he helped to develop guidelines for the field of teratology, the study of birth defects. Prior to Warkany’s work, scientists struggled to explain if or how environmental agents could cause birth defects. Warkany demonstrated that a deficiency or excess of vitamin A in maternal nutrition could cause birth defects. 2017-05-26 4 Jul 2018 - 4:40:59am
Somites: Formation and Role in Developing the Body Plan Corinne DeRuiter Somites are blocks of mesoderm that are located on either side of the neural tube in the developing vertebrate embryo. Somites are precursor populations of cells that give rise to important structures associated with the vertebrate body plan and will eventually differentiate into dermis, skeletal muscle, cartilage, tendons, and vertebrae. Somites also determine the migratory paths of neural crest cells and of the axons of spinal nerves. 2010-10-20 4 Jul 2018 - 4:40:59am
Gastrulation in Xenopus Inbar Maayan The process of gastrulation allows for the formation of the germ layers in metazoan embryos, and is generally achieved through a series of complex and coordinated cellular movements. The process of gastrulation can be either diploblastic or triploblastic. In diploblastic organisms like cnidaria or ctenophora, only the endoderm and the ectoderm form; in triploblastic organisms (most other complex metazoans), triploblastic gastrulation produces all three germ layers. 2011-03-10 4 Jul 2018 - 4:40:59am
Shoukhrat Mitalipov and Masahito Tachibana's Mitochondrial Gene Replacement Therapy Technique Giselle Lee In 2009, Shoukhrat Mitalipov, Masahito Tachibana, and their team of researchers developed the technology of mitochondrial gene replacement therapy to prevent the transmission of a mitochondrial disease from mother to offspring in primates. Mitochondria contain some of the body's genetic material, called mitochondrial DNA. Occasionally, the mitochondrial DNA possesses mutations. 2017-09-06 4 Jul 2018 - 4:40:59am
Theophilus Shickel Painter (1889-1969) Dorothy Haskett Theophilus Shickel Painter studied the structure and function of chromosomes in the US during in the early to mid-twentieth century. Painter worked at the University of Texas at Austin in Austin, Texas. In the 1920s and 1930s, Painter studied the chromosomes of the salivary gland giant chromosomes of the fruit fly (Drosophila melanogaster), with Hermann J. Muller. Muller and Painter studied the ability of X-rays to cause changes in the chromosomes of fruit flies. Painter also studied chromosomes in mammals. 2014-11-22 4 Jul 2018 - 4:40:59am
Ovum Humanum: Growth, Maturation, Nourishment, Fertilization and Early Development (1960), by Landrum Brewer Shettles Stephen C. Ruffenach Ovum Humanum was written and compiled by Dr. Landrum Brewer Shettles while he worked as a doctor in New York. The publication contains an atlas of photographs of the human egg cell that Shettles took while working at Columbia Presbyterian Hospital in New York City. Stechert-Hafner, Inc, a publishing company based in New York City, published the book in 1960. The book presents a collection of color photographs that shows detail of the human egg that had never been seen before, providing a reference for scientists and doctors that documented the anatomy of these cells. 2009-07-21 4 Jul 2018 - 4:40:59am
Frederik Ruysch (1638-1731) Britta Martinez Frederik Ruysch made anatomical drawings and collected and preserved human specimens, many of which were infants and fetuses, in the Netherlands during the seventeenth and eighteenth centuries. Ruysch had many interests, including anatomy, botany, and medicine, and he discovered structures of the lymphatic system and of the eye. His collection of preserved human specimens were used as educational tools for his students and for other physicians, and they were displayed in a museum of his own making that was open to the public. 2013-04-08 4 Jul 2018 - 4:40:59am
"Experiments in Transplanting Limbs and Their Bearing Upon the Problems of the Development of Nerves" (1907), by Ross Granville Harrison Adam R. Navis In his 1907 paper, "Experiments in Transplanting Limbs and Their Bearing Upon the Problems of the Development of Nerves," in the Journal of Experimental Zoology that he edited, Ross Granville Harrison tested the development of nerves in transplanted tissue. He studied neural development by examining two competing theories. Victor Hensen proposed a syncytial theory as a way to explain neural development, suggesting that all the nerves of an embryo were connected directly by cytoplasm laid down early in development, and leaving no room for later modification. 2007-11-08 4 Jul 2018 - 4:40:59am
"Evolution and Tinkering" (1977), by Francois Jacob Valerie Racine In his essay Evolution and Tinkering, published in Science in 1977, Francois Jacob argued that a common analogy between the process of evolution by natural selection and the methods of engineering is problematic. Instead, he proposed to describe the process of evolution with the concept of bricolage (tinkering). In this essay, Jacob did not deny the importance of the mechanism of natural selection in shaping complex adaptations. Instead, he maintained that the cumulative effects of 2014-10-24 4 Jul 2018 - 4:40:59am
Catherine DeAngelis (1940– ) Alexis Darby In the late-twentieth century in the United States, Catherine DeAngelis was a pediatric physician, researcher, and editor of multiple medical journals. During her time with the Journal of the American Medical Association, DeAngelis became the journal’s first female editor. At Johns Hopkins University in Baltimore, Maryland, she studied how physician-nurse interactions affected patient care, how immunizations and adolescent pregnancy affected children, and how medications affected men and women differently. 2017-12-07 4 Jul 2018 - 4:40:59am
Zhang Lizhu (1921- ) Lijing Jiang Zhang Lizhu is a Chinese gynecologist and researcher. For most of her career, she worked in the Peking Medical College Third Hospital, renamed in 2000, Peking University Third Hospital. There, she led a team of researchers and physicians in the study of human in vitro fertilization (IVF) and embryo transfer (ET) technology. Zhang and her colleagues contributed to the birth of the first test-tube baby in Mainland China in 1988. 2011-08-16 4 Jul 2018 - 4:40:59am
Rita Levi-Montalcini (1909-2012) Adam R. Navis Rita Levi-Montalcini is a Nobel Laureate recognized for her work in the discovery and characterization of nerve growth factor. Nerve growth factor (NGF) promotes the growth and maintenance of the nervous system in a developing system. The majority of her career has been devoted to investigating the many aspects of NGF. 2007-11-08 4 Jul 2018 - 4:40:59am
Ernest Everett Just (1883-1941) Karen Wellner Ernest Everett Just was an early twentieth century American experimental embryologist involved in research at the Marine Biological Laboratory (MBL) at Woods Hole, Massachusetts, and the Stazione Zoologica in Naples, Italy. Just was known for simple but elegant experiments that supported the "fertilizing" theory of Frank R. Lillie and served as an antagonist to Jacques Loeb's work with artificial parthenogenesis. 2010-06-16 4 Jul 2018 - 4:40:59am
A plant genetically modified that accumulates Pb is especially promising for phytoremediation (2003), by Carmina Gisbert et al. Ernest Nkansah-Dwamena In 2003, Carmina Gisbert and her research team produced a tobacco plant that could remove lead from soil. To do so, they inserted a gene from wheat plants that produces phytochelatin synthase into a shrub tobacco plant (Nicotiana glauca) to increase N. glauca's absorption and tolerance of toxic metals, particularly lead and cadmium. Gisbert and her team aimed to genetically modify a plant so that it could be used for phytoremediation- using plants to remove toxic substances from the soil. 2014-12-30 4 Jul 2018 - 4:40:59am
Warren Tay (1843–1927) Tiffany Nardi The arterial switch operation, also called the Jatene procedure, is an operation in which surgeons redirect the flow of blood through abnormal hearts. In 1975, Adib Jatene conducted the first successful arterial switch operation on a human infant. The arterial switch operation corrects a condition called transposition of the great arteries, abbreviated TGA, also called transposition of the great vessels, abbreviated TGV. TGA occurs when the pulmonary artery, which supplies deoxygenated blood to the lungs, and the aorta, which takes oxygenated blood to the body, are switched, or transposed. 2017-05-27 4 Jul 2018 - 4:40:59am
Charles Benedict Davenport (1866-1944) Cera R. Lawrence Charles Benedict Davenport was an early twentieth-century experimental zoologist. Davenport founded both the Station for Experimental Evolution and the Eugenics Record Office at Cold Spring Harbor in New York. Though he was a talented statistician and skilled scientist, Davenport's scientific achievements are eclipsed by his lasting legacy as the scientific leader of the eugenics movement in the US. 2011-05-12 4 Jul 2018 - 4:40:59am
Ernst Heinrich Philipp August Haeckel (1834-1919) Karen Wellner Ernst Heinrich Philipp August Haeckel was a prominent comparative anatomist and active lecturer in the late nineteenth and early twentieth centuries. He is most well known for his descriptions of phylogenetic trees, studies of radiolarians, and illustrations of vertebrate embryos to support his biogenetic law and Darwin's work with evolution. Haeckel aggressively argued that the development of an embryo repeats or recapitulates the progressive stages of lower life forms and that by studying embryonic development one could thus study the evolutionary history of life on earth. 2010-06-16 4 Jul 2018 - 4:40:59am