Science and Medicine

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Entry Category: Science and Medicine - Starting with H

Haemogregarines

Haemogregarines are protist parasites that belong to the Phylum Apicomplexa, Class Conoidasida, Order Eucoccidiorina, and Suborder Adeleorina, and include the following seven families: Adeleidae, Dactylosomatidae, Haemogregarinidae, Hepatozoidae, Karyolysidae, Klossiellidae, and Legerellidae. There are two major genera, Haemogregarina and Hepatozoon, in addition to several minor ones, including Babesiosoma, Bartazoon, Cyrilia, Dactylosoma, Desseria, Hemolivia, and Karyolysus. As a group, these parasites are cosmopolitan in their range of infected hosts (such as turtles, crocodiles, birds, reptiles, and mammals) and geographic distribution. In general, haemogregarines sensu lato (meaning, in a broad sense) are elongate to fusiform ovoidal organisms that occur within the erythrocytes (red blood cells) of various animals, mostly poikilothermic vertebrates (animals whose internal temperatures vary widely). They form a group of diverse …

Hall-Trujillo, Kathryn

Kathryn Hall-Trujillo is a public health expert and advocate who focuses on healthcare for African-American women. Best known for founding Birthing Project USA, “Mama Katt,” as she has been affectionately called, was named a 2010 hero by the CNN television network for her work with at-risk mothers and babies. She is a member of the Arkansas Black Hall of Fame. Kathryn Hall-Trujillo was born on July 19, 1948, in Moscow (Jefferson County), a small town near Pine Bluff (Jefferson County). Her mother’s name was Corrine. She has said that her grandmother was her mentor. She said of her childhood, “Even though I came from a family that was poor, I came from a very good family; we loved one another …

Hall, William Sterling

William Sterling Hall was a prominent Black psychologist. Hall’s career spanned five decades, during which he produced numerous published scholarly articles and books focusing upon several areas of psychology, including language development, cognitive development, developmental neuroscience, and neuroanatomy. William Hall was born on July 6, 1934, in Scott (Pulaski and Lonoke counties) to Joseph William Hall, who was a housing developer, and Mattie Brock Hall, an educator. Hall had two siblings, brother Joseph Lesley Hall and sister Bessie Ruth Hall Perry. Hall attended Scipio A. Jones High School in North Little Rock (Pulaski County) and graduated in 1951. Education and religion were both very important in Hall’s home; many members of his family were ministers and educators. After high school, …

Hallock, Harry M.

Harry M. Hallock served as the sole medical director of what was known at the time as Hot Springs Reservation. In 1832, the U.S. Congress set aside the reservation, which became Hot Springs National Park in 1921, to preserve the springs for public benefit. Hallock introduced controversial regulations that improved the quality of medical care in Hot Springs (Garland County), while also earning him the scorn of some local elites. Chronic illness and political opposition drove him to suicide. Henry Hallock was born on October 14, 1867, in Jersey City, New Jersey. He graduated from the College of Physicians and Surgeons in New York City in 1890. He married Jannette Halford; they had a son named Halford and a daughter …

Handywagon

The Handywagon, built in 1964 for the Arkansas Louisiana Gas Company (Arkla), was intended as an economical vehicle for use by the company’s Gaslite and domestic appliance servicers, meter readers, collectors, and meter setters. The small wagon was designed to be easily reparable and average thirty-five miles per gallon. In mid-1963, Arkla board chairman Wilton “Witt” R. Stephens asked company lawyer Raymond Thornton to design a utility vehicle that could operate economically, have a 900-pound load capacity, weigh less than a ton and a half, and be company-built. In 1964, Thornton chose Ed Handy, a company construction engineer, to collaborate with him on the project. After much research, the two men found the power train they needed in Holland. Van …

Harding, Arthur McCracken

Arthur McCracken Harding, the first Arkansas-born president of the University of Arkansas (UA) in Fayetteville (Washington County), served his alma mater as a professor and in various administrative positions from 1905 to 1941, and then as president from 1941 to 1947. His teaching was marked by publication of books on mathematics and astronomy, and his administrative service developed new programs and extension of university education throughout Arkansas. As university president, he worked to quell political turmoil and helped UA face changes to the university brought by World War II. Arthur McCracken Harding was born on September 3, 1884, in Pine Bluff (Jefferson County), the eldest of seven sons, to Charles Taylor Harding and Florence May Brewster Harding. (His great-grandfather was …

Harris, Ernest James

Ernest James Harris was an accomplished entomologist known for his work on breeding Biosteres arisanus, a species of wasp that parasitizes fruit fly eggs. Thanks to the work done by Harris, B. arisanus has been bred on a large scale for the purposes of pest eradication. More than twenty nations have adopted use of the “Harris strain” of the wasp for fruit fly eradication. Harris was inducted into the Arkansas Black Hall of Fame in 1999. Ernest J. Harris was born on May 24, 1928. His parents had a farm in North Little Rock (Pulaski County), where Harris’s interest in insects first developed. After graduation, he attended Arkansas AM&N (now the University of Arkansas at Pine Bluff). There, he majored …

Harrison, William Floyd Nathaniel

William Floyd Nathaniel Harrison was an obstetrician/gynecologist, abortion provider, congressional candidate, and author. During his career, he became locally and nationally known as an outspoken pro-choice physician. Born on September 8, 1935, in Vilonia (Faulkner County), William Harrison was the fourth of Benjamin G. Harrison and Mattie E. Powell Harrison’s five children. His parents were teachers. His family attended both Methodist and Baptist churches. Educated in the public schools, he attended Arkansas State Teachers College (now the University of Central Arkansas) in Conway (Faulkner County) in the early 1950s but did not complete a degree. He served in the U.S. Navy in the late 1950s. Entering the University of Arkansas (UA) in Fayetteville (Washington County) in 1959, he studied pre-medicine and graduated in 1963. …

Harry K. Dupree Stuttgart National Aquaculture Research Center

The U.S. Department of Agriculture Agricultural Research Service (USDA-ARS) actively supports aquaculture through research conducted at the Harry K. Dupree Stuttgart National Aquaculture Research Center (HKDSNARC) in Stuttgart (Arkansas County). The mission of the HKDSNARC is to conduct cutting-edge research that addresses the highest priorities of the U.S. aquaculture industry, as well as serving as a global leader in aquaculture research. The research conducted addresses vital issues that are national in scope and result in new knowledge that informs scientists, farmers, feed mills, pharmaceutical companies, processors, teachers, governmental agencies, and consumers. The HKDSNARC collaborates with universities, international research institutions, government agencies, and private industry. Since the 1970s, aquaculture has been the fastest-growing sector of global food production. Global aquaculture production in …

Harvestmen

aka: Daddy Long-Legs
aka: Granddaddy Long-Legs
Harvestmen belong to the Phylum Arthropoda, Subphylum Chelicerata, Class Arachnida, and Order Opiliones. They represent the third most diverse order in Arachnida. The order Opiliones includes five suborders as follows: Cyphophthalmi, Eupnoi, Dyspnoi, Laniatores, and Tetrophthalmi. They are often referred to as “daddy long-legs.” They are found throughout the world (except Antarctica), and there are over 6,650 species. Their common name is derived from the fact that they are common during the harvesting season. They are traditionally akin with the Order Acari (ticks and mites) or the Novogenuata (the Scorpiones, Pseudoscorpiones, and Solifugae); however, others suggest the Opiliones forms a clade with the scorpions and two smaller orders. As such, they are considered the sister group of scorpions. In addition, …

Health and Medicine

Arkansas long had a reputation for being sickly because much of the state supported large mosquito populations, carrying malaria, yellow fever, and other diseases. Modern medicine, a largely nineteenth-century creation, arrived late, and throughout the twentieth century, diseases eradicated elsewhere continued to flourish. Only after World War II did sharp improvements in health occur, but the Delta lagged far behind. Problems in health and medical programs were compounded in part because many Arkansans deliberately engaged in forms of risky behavior such as tobacco use and unhealthy diets. Prehistoric Arkansas The first settlers more than 10,000 years ago brought to the New World only a few major illnesses. One was tuberculosis, evidence of which is visible in bones from burial sites. …

Hemipterans

aka: True Bugs
Hemipterans, or true bugs, belong to the Phylum Arthropoda, Superclass Hexapoda, Class Insecta, Order Hemiptera, and four suborders: Auchenorrhyncha, Coleorrhyncha, Sternorrhyncha, and Heteroptera. Hemiptera is the largest order of hemimetabolous insects (those not undergoing complete metamorphosis), although male scale insects (Coccoidea) do undergo a form of complete metamorphosis. The number of species in the order is about 75,000, with a great diversity of forms, including aphids, cicadas, leafhoppers, planthoppers, and shield bugs. The three largest families of Heteroptera are Miridae (plant bugs), Lygaeidae (seed bugs), and Pentatomidae (stink bugs). The largest family, Miridae, contains major insect pests and predatory groups that can be used as biological control agents. Although hemipterans inhabit a wide variety of habitats, most are generally terrestrial, …

Herndon, Elisabeth Chapline

Sarah Elisabeth Chapline Herndon was the only volunteer Red Cross nurse from Arkansas to serve in the Spanish-American War. Elisabeth Chapline was born on April 4, 1871, near Sweet Home (Pulaski County) to William Heros Chapline and Mary Murray Chapline. Her father was a landowner and planter. She had one brother and two sisters. Chapline attended the Arkansas Female College in Little Rock (Pulaski County) and nursing school at Chicago Baptist Hospital in Illinois. When war broke out in 1898, Chapline was too young for enlistment but was admitted as a contract nurse. She served in Fernandina, Florida, and at Camp Cuba Libre in Panama City, Florida. She was one of 1,700 volunteer nurses to serve in the war. Chapline …

Herrings

aka: Clupeids
Herrings (Order Clupeiformes) belong to a large family (Clupeidae) of about 200 species within fifty-four genera of cosmopolitan ray-finned fishes that are mostly marine; a few inhabit freshwater, and some are anadromous—that is, they migrate up rivers from saltwater habitats for purposes of spawning. The family includes herrings, menhadens, sardines, and shads. Most herrings are small fishes, generally being less than 300 mm (12 in.), but some may reach 750 mm (30 in.). Many are valuable food fishes and are collected for production of fish meal and oil, protein concentrate, and fertilizer. Some commercially important species include Atlantic herring (Clupea harengus) found in the north Atlantic, Pacific sardine (Sardinops sagax), and Atlantic menhaden (Brevortia tyrannus). In the fossil record, clupeid …

Hildreth, James Earl King

James Earl King Hildreth, a leading HIV/AIDS researcher, is dean of University of California–Davis College of Biological Sciences. Previously, he was employed by Meharry Medical College in Nashville, Tennessee, where he was director for the Center for AIDS Health Disparities Research; program director of the Research Centers in Minority Institutions; director of the Meharry Center for Translational Research; associate director at the Vanderbilt-Meharry Center for AIDS Research; and professor of internal medicine, microbiology, and immunology. At the Center for AIDS Health Disparities Research, he worked on a cream that kills the human immunodeficiency virus (HIV). James Earl Hildreth was born in Camden (Ouachita County) on December 27, 1956, to Lucy and R. J. Hildreth. He is the youngest of seven …

Hodges, Thomas L.

Thomas Luther Hodges was a noted physician and amateur archaeologist in Hot Spring County in the early twentieth century. Focusing on materials related to the late prehistoric Caddo, the collection accumulated by Hodges and his wife, Charlotte, is now held by the Joint Educational Consortium in Arkadelphia (Clark County). Thomas L. Hodges was born in Morehead, Kentucky, on January 17, 1868. It is unclear what happened to Hodges’s birth parents, but he became the adopted son of William and Sarah Hodges and moved with his adoptive family to Knox County, Missouri, in the early 1870s. His father died in 1874, and Sarah Hodges remarried the following year to widower George Sloan. In the 1880 federal census, Hodges appears with his …

Hookworm Eradication

Hookworm disease was a significant public health issue in Arkansas until the movement to eradicate hookworms in the early twentieth century. With official estimates claiming that up to twenty percent of the entire population of the state suffered from hookworm infestation, this parasite was sufficiently widespread to affect the economy as well as the health of Arkansas. Its virtual eradication was the result of a public health and education campaign on the part of the Rockefeller Sanitary Commission between 1910 and 1914. The hookworm is an intestinal parasite that grows and reproduces in the intestines of its hosts. When infected people deposit feces containing hookworm eggs in warm, moist, shaded soil, the eggs hatch and develop into larvae. Within five …

Hooper, Philo Oliver

Philo Oliver Hooper has been called the father of Arkansas medicine. He was one of the founders of the Medical Department of Arkansas Industrial University, now the University of Arkansas for Medical Sciences (UAMS), a founder and the first president of the Arkansas State Medical Association, a founding board member and director of the Arkansas Lunatic Asylum, and vice president of the American Medical Association. P. O. Hooper was born on October 11, 1833, in Little Rock (Pulaski County) to Alanson Hooper and Magdaline Perry Hooper. After obtaining what education was available in the city at the time, he pursued his education at Nashville University in Nashville, Tennessee. Returning home to Little Rock, he found employment as the chief clerk …

Hoover, Dorothy M.

aka: Dorothy Estheryne McFadden Clarke Hoover
Dorothy M. Hoover was a pioneer in the field of aeronautical mathematics and physics. The granddaughter of enslaved people, she overcame the significant obstacles facing African American women in the Jim Crow era of the twentieth century to earn advanced degrees in mathematics and physics. One of her greatest achievements in aeronautical research was her contribution to the development of the “thin sweptback tapered wing,” which revolutionized flight and became the aviation industry standard. Her life story was essentially unknown until she was briefly mentioned in the highly acclaimed book Hidden Figures: The American Dream and the Untold Story of the Black Women Mathematicians Who Helped Win the Space Race (2016), by Margot Lee Shetterly. Hidden Figures, which was made …

Hospital Unit T

When the United States entered World War I on April 6, 1917, the need for trained medical personnel was great, and medical units of doctors, nurses, and enlisted men were recruited heavily. The American Red Cross asked for units to be formed from hospitals and medical schools across the United States to go to France and England. Arkansas’s contribution was Hospital Unit T, Medical Department, National Army (called Hospital Unit T for short). Dr. William A. Snodgrass, a Little Rock (Pulaski County) physician with the University of Arkansas Medical School (now the University of Arkansas for Medical Sciences) was authorized to form a unit for military service. His authorization was announced in the Arkansas Gazette on July 1, 1917. This …

Hospitals (Civil War)

A wide range of Civil War hospitals in Arkansas included field hospitals established in the immediate aftermath of battle, commandeered houses and churches, and somewhat permanent post hospitals in occupied areas. Union bases tended to have more purpose-built hospital facilities, while Confederate doctors made use of any available buildings, such as colleges, hotels, churches, and private homes. The need for hospital facilities became obvious soon after Arkansas seceded from the Union and the new Confederate recruits became ill from the myriad diseases that afflicted their camps. Hospitals were established wherever large groups of troops gathered, often treating soldiers from specific regiments or from the same states. In early 1862, for instance, Confederate forces in Washington County established the Mount Comfort …

Hot Springs Medical Journal

In the late nineteenth and early twentieth centuries, Hot Springs (Garland County) was home to the Hot Springs Medical Journal, first published in January 1892. Although medical journals were published in nearby locations including Little Rock (Pulaski County), Memphis, Tennessee, and St. Louis, Missouri, the founders of the publication felt that the natural hot springs for which the city was named provided a great resource for many patients. They stated in the first volume: “The city of Hot Springs, Arkansas is…the greatest sanitarium on earth, and in a few years is inevitably destined to become the most universally frequented health resort in the world.” At that time, Hot Springs was already quite a tourist area. The resident population was 15,000, …