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Death > Hair Test 1 > Flashcards

Hair Test 1 Flashcards

1
Q

exchange theory by

A

Edmond Locard

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2
Q

Locard’s theory

A

two objects come into contact always transfer of material

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3
Q

person transfers his hair to an object

A

direct

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4
Q

direct transfers are always

A

primary

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5
Q

person transfers hair not his

A

indirect

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6
Q

indirect can be

A

primary or secondary

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7
Q

87 study gaudette and tessarolo

A

indirect more common than direct, secondary happens in case work

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8
Q

peabody study

A

headgear and sample similar to combing

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9
Q

contamination issues

A

list of protective clothing and separation of victim from suspect

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10
Q

Picking and tweezing procedure

A

10% bleach solution, bindles or boxes

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11
Q

scraping procedure

A

metal spatula, airborne particles, clean everything

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12
Q

tape lift procedure

A

Frei-sulzer 51, grid fashion, different adhesive quality, more than less

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13
Q

Vacuuming procedure

A

special units required, recovers too much, contamination

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14
Q

microscope plays role in maximizing information

A

microscopy

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15
Q

image not seen directly

A

virtual image

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16
Q

image seen by light rays on screen

A

real image

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17
Q

5-10 times magnification

A

magnifying glass

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18
Q

1500x mag

A

compound

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19
Q

two compounds together

A

comparison

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20
Q

10-125 x mag 3D

A

stereoscopic

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21
Q

light waves to one plane

A

polarizing

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22
Q

visible, ultraviolet, infrared (trace)

A

microspectrophotometer

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23
Q

beam of electrons, million x

A

scanning electron microscope

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24
Q

stay in focus when objective changes

A

parfocal

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25
Q

center of view when objective changes

A

parcentric

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26
Q

distance from objective to cover glass

A

working distance

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27
Q

field of view and depth of focus both

A

decrease with increase in magnification

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28
Q

the ability of the objective lens to resolve fine detail

A

numerical aperture

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29
Q

beyond 1000x the numerical aperture of objective

A

empty magnification

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30
Q

microscope care

A

common sense

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31
Q

stereoscopic microscope also called

A

dissecting microscope

32
Q

collection of pollen and spores

A

forensic palynology

33
Q

pounds and smalldon 2

A

number of fibers transferred based on area, pressure,number of contacts

34
Q

pounds and smalldon 4

A

mechanisms loose, pulled out, fragments pulled loose

35
Q

kidd and robertson

A

pressure only to a point, polyester and viscose less than cotton, acrylic, wool

36
Q

Differential Shedding Phenomenon

A

blended fabrics don’t shed proportionately

37
Q

salter study

A

minor component shed more readily

38
Q

proportions refer to weight composition

A

garment labels

39
Q

mitchell and holland case

A

only wool transferred in blend pants

40
Q

polyester cotton mixture

A

corduroy

41
Q

Cordiner 85

A

more fine fibers collected

42
Q

microfibers can create ? times more material

A

17

43
Q

lowrie and jackson

A

88% secondary transfer

44
Q

persistence

A

initial loss of 80% in first 4 hours. only 5-10% after 24hours

45
Q

robertson 82

A

longer fibers move easier than short

46
Q

pounds and smalldon 75 4th study (three states)

A

loosely bound, bound, strongly bound

47
Q

john glaister 31

A

cairo egypt, 1700 photomicrographs

48
Q

three parts of hair

A

cortex, cuticle, medulla

49
Q

living part of hair

A

follicle

50
Q

hair is made of

A

keratin

51
Q

outer layer of skin

A

epidermis

52
Q

just below epidermis

A

dermis

53
Q

tube shaped sheath around hair under skin

A

follicle

54
Q

goosebump muscle

A

arrector pili

55
Q

cell that produces melanin

A

melanocyte

56
Q

sack shaped gland that produces oily liquid onto the hair

A

sebacuous gland

57
Q

sudoriferous gland

A

sweat gland

58
Q

number of hair follicles on average person/head

A

5 million, 1 million

59
Q

number of actual hairs and growh

A

100-120K with growth up to 1/2 inch

60
Q

hair length is determined by what

A

anagen phase and genetics

61
Q

three stages

A

anagen catagen telagen

62
Q

how many hairs lost each day

A

50-150

63
Q

sign of decomposition in hair

A

postmortem root banding

64
Q

three types of animal hairs

A

vibrissa, bristle (guard), wool

65
Q

four types of human hair

A

primordial, lanugo, vellus, terminal

66
Q

primary or asexual hairs

A

replace lanugo hair

67
Q

secondary or sexual

A

replace vellus at puberty in pits and pubes

68
Q

pigmentation is made of

A

melanin

69
Q

melanin is made from

A

tyrosine

70
Q

black brown pigment

A

Eumelanin

71
Q

red yellow pigment

A

pheomelanin

72
Q

mixed melanins

A

just mixed

73
Q

color decide by

A

type and size of melanin granules

74
Q

three groups of animals

A

Domestic, commercial fur, deer family

75
Q

types of medulla (human)

A

fragmentary, discontinuous, continuous (amorphous)

76
Q

types of medulla (animal)

A

uniserial. multiserial ladder, vacuolated, lattice, amorphous

77
Q

three types of scales

A

coronal, spinous, imbricate

Death (11 decks)

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