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  • USA_SFOL_06_xs.The annual Folsom Street Fair in San Francisco's South of Market district is is held on the last Sunday in September and caps San Francisco's Leather Pride Week. It was started in 1984 for gays and lesbians, and other practitioners of alternative lifestyles. California, USA. .
    USA_SFOL_06_xs.jpg
  • Maddox Dairy in Riverdale, California. Artificial insemination.
    USA_AG_DAIR_06_xs.jpg
  • Maddox Dairy in Riverdale, California. Artificial insemination.
    USA_AG_DAIR_05_xs.jpg
  • Poultry: Nicholas Turkey Breeding Farms, Sonoma, California, USA. Milking sperm from large male turkeys that are too big to breed naturally.
    USA_AG_TURK_05_xs.jpg
  • Maddox Dairy in Riverdale, California. Artificial insemination. Maddox Dairy is currently home to 3500 milking cows, calves, heifers and bulls. The dairy is a "birth to milking operation", with four, double-12, pregnant herringbone-milking parlors, free stall barns, calf raising barn and calving facilities. The dairy does their own embryo transfer work and markets their genetics worldwide. The Maddox Dairy was honored in 2001 with the Distinguished Dairy Cattle Breeder award for being a "Visionary Holstein Breeder", having bred more than 330 Gold Medal Dams, 502 Excellent cows, and their advancements in gene research for the Dairy industry.
    USA_AG_DAIR_06_xs.jpg
  • Maddox Dairy in Riverdale, California. Artificial insemination. Maddox Dairy is currently home to 3500 milking cows, calves, heifers and bulls. The dairy is a "birth to milking operation", with four, double-12, pregnant herringbone-milking parlors, free stall barns, calf raising barn and calving facilities. The dairy does their own embryo transfer work and markets their genetics worldwide. The Maddox Dairy was honored in 2001 with the Distinguished Dairy Cattle Breeder award for being a "Visionary Holstein Breeder", having bred more than 330 Gold Medal Dams, 502 Excellent cows, and their advancements in gene research for the Dairy industry. .
    USA_AG_DAIR_05_xs.jpg
  • Poultry: Nicholas Turkey Breeding Farms, Sonoma, California, USA. Milking sperm from large male turkeys that are too big to breed naturally.
    USA_AG_TURK_05_xs.jpg
  • (1992) Forensic scientist at a scene of crime. The scientist here is using a laser to look for possible traces of semen at the scene of a murder. The area is sprayed with a marker, which binds to proteins in the semen. If bound, the marker fluoresces under the light from the laser. This was the scene of the murder of a 49-year-old woman who had been stabbed repeatedly. Traces of semen may be used to provide a DNA fingerprint, possibly linking a suspect to the scene.  Flushing, New York. (Scientist is Detective Roussine, NYPD.) DNA Fingerprinting. MODEL RELEASED.
    USA_SCI_DNA_04_xs.jpg
  • (1992) Narborough station, town where Lynda Mann and Dawn Ashworth resided; Lynda Mann was raped and murdered in 1983 forensic scientists took semen samples, but couldn't find a murderer. In 1986 Dawn Ashworth was murdered a similar way. Police were convinced that the same assailant had committed both murders, and the FSS recovered semen samples from Dawn's body that revealed her attacker had the same blood type as Lynda's murderer. Colin Pitchfork was arrested and his DNA profile was found to match with the semen from both murders. He was eventually sentenced to life imprisonment for the two murders in 1988.
    GBR_SCI_DNA_20_xs.jpg
  • (1992) Matt McCoy (front) and Mark Bodee extract DNA from fetal tissues and blood and semen stains at Cellmark Diagnostics in Germantown, Maryland. ). DNA consists of two sugar- phosphate backbones, arranged in a double helix, linked by nucleotide bases. There are 4 types of base; adenine (A), cytosine (C), guanine (G) and thymine (T). Sequences of these bases make up genes, which encode an organism's genetic information. DNA Fingerprinting. MODEL RELEASED.
    USA_SCI_DNA_26_xs.jpg
  • (1992) Blood storage. Blood samples being stored in a cryogenic freezer. The blood can be used to produce a DNA fingerprint even after years of storage. Selected DNA extracted from the blood is separated into DNA bands by electrophoresis in an agarose gel. The pattern of DNA bands is unique to each person, but related people, such as a parent & child, share some bands. DNA fingerprints can be used to prove conclusively whether people are related. It can also be used to identify and convict criminals from blood, semen or hair left at the scene of a crime.  Cellmark Diagnostics, a commercial laboratory near Oxford, UK.
    GBR_SCI_DNA_06_xs.jpg
  • (1992) At the Home Office of the Forensic Science Service in Aldermaston, England, John Bark and Linda Nelson discuss the results of a DNA profile of blood and semen samples taken from a pair of pants. The blood will be removed, and then analyzed using DNA fingerprinting techniques. This will enable the scientist to determine whether the blood belonged to the victim or the assailant. Hanging up in the foreground are various DNA (deoxyribonucleic acid) autoradiograms from other DNA fingerprinting studies. DNA consists of two sugar- phosphate backbones, arranged in a double helix, linked by nucleotide bases. There are 4 types of base; adenine (A), cytosine (C), guanine (G) and thymine (T). Sequences of these bases make up genes, which encode an organism's genetic information. The bands (black) on the autoradiogram show the sequence of bases in a sample of DNA. MODEL RELEASED
    GBR_SCI_DNA_01_xs.jpg

Peter Menzel Photography

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