、镜片材质
1、天然材料--水晶镜片:
这种材料的主要成份是二氧化硅,通常分为无色和茶色两种。材质不易磨损,热膨胀系数小。由于它对紫外线具有特有的透明度,佩戴时容易引起视疲劳。
主要材料有“托力克片”、“克罗克斯片”、“克罗克赛片”、“超薄片”、“1.60玻璃镜片”。具有比其它材质的镜片更耐刮的特性,但相对的其重量也较沉,其折射率相对高:普通片为1.523,超薄片为:1.72以上,最高可达2.0。其折射率比树脂镜片高,因此在同样度数情况下,玻璃镜片要比树脂镜片薄。玻璃镜片的透光率和机械化学性能都比较好,有恒定的折射率、理化性能稳定。没有颜色的镜片称光学白托(白片),有色片中的粉红片称克罗克赛镜片(红片)。克罗克赛镜片能吸收紫外线、对强光略有吸收作用。但是玻璃片易碎,材质偏重。
3、树脂片:
最具代表性的是CR-39,由硬而透明的材质制成,折射率为1.499,透光率为92%。从材质特点看,它具有较好的热稳定性,在150摄氏度以下不变形,耐水性、耐腐蚀性(除强酸)也较好,不溶于一般的有机溶剂。质轻,比重为1.32,是玻璃的二分之一,耐冲击、不易碎、安全感强(符合美国FDA标准),配戴舒适且加工方便,用途广(包。
括半框、无框镜架中使用),对紫外线的吸引能力高于玻璃镜片;热传导率低,由水蒸气引起的"水雾"的情况比玻璃镜片好一些。但是受材质影响,树脂片也存在不足之处:由于镜片耐磨性较差,表面易擦伤,而且镜片折射率低,相对比玻璃镜片要厚1.2-1.3倍。
4、PC片(碳酸聚脂镜片):
一般的树脂镜片都是热固性材料,即原料为液态,加热后形成固态镜片。PC片又叫“太空片”、“宇宙片”,化学名称为聚碳酸酯,是热塑性材料。即原料为固态,经加热后塑形为镜片,所以这种镜。
Hello everyone, today I'll introduce a very famous people, I think everybody should know him, MaiKeJieKeXun, is the elvis Presley after, western pop music's most influential musicians. Their achievements beyond elvis Presley, the beatles, known as the King of Pop music, King of Pop) (" the world's most famous man "is the most people with fans.。
He is an excellent music all-rounder, lyricist, composer, arranger, making, scene singing, dancing, instrument playing all have very outstanding achievement. The circle is pop singer of greatness, and most influential.。
Family and marriage。
Michael Jackson in August 29 born in 1958, the home has nine brothers and sisters, ranking the first 7. He。
Only five years old, MaiKeJieKeXun 1960 had and four brother formed jackson5, he is, and they are very successful singer in the world, and performance.。
In 1970, MaiKeJieKeXun began his solo career.。
In total he married twice, the first wife is elvis Presley's daughter, Lisa Marie Presley, but this marriage lasted less than two years, the second wife Deborah Rowe, Jeanne is they had two children, a man and a woman prince Michael Jackson and Paris Katherine Jackson micheal, they also divorced, in 1990.。
music
He is a total of 35 album,。
1982 M released an album (thriller) inside mix of music form, return the first pioneered the mv and is the longest mv since nine minutes, space step, mechanical dance, it makes it ZhangCheng to the world's most popular album was also one of the national library, collection.。
There are some of the very famous songs, such as Beat it, Billie Jeans. "Thriller" was also the first album, the total sales albums has amounted to 1.1 million tickets, ranked second AC/DC "Back in Black" only it's half.。
He through thriller became the first appeared on MTV's black singer, it brought to the black music really mainstream world.。
cosmetic
MaiKeJieKeXun were four cosmetic surgery, three times in the dance was nose surgery because of injury, another is the scalp burns, he also opened a groove in the chin. Many people believe that his skin is through the surgery or drug turned white, but this is wrong, he suffered from severe skin vitiligo, which made him the melanin slowly disappear, it makes him look like a white.。
He has been pride myself is black.。
awards
Generally seen as being and the beatles and elvis, listed the all-time greats of pop singer.。
25 since broke all the music sales global music and prizes records.。
30 years old to obtain the "King of Pop music" (King of Pop) this great title.。
The first in the area outside the United States to sell 100 million album artist.。
History in a year into the millions of dollars earned the artist in history, but also the highest reward artist (in 1989, only from the single and album sales is cleared $125 million).。
The United States single list champion won the most young singer (11 years old, Jackson five band boyzone).。
The first single issue that the first week of music list champions won American singer (" You Not Alone "). Hero。
In the United States on top of the longest champion throne Thriller, "the album (37 weeks).。
The most successful music video (" Thriller "and sold one million sets).。
The world of the highest amount accumulative total charitable artist (to 2006, individual charitable donations have as much as $300 million).。
The history of the world's most successful artist (the "guinness book of world records" especially for Michael calendar year countless great accomplishment in the guinness book of world records awarded authentication).。
In the Netherlands has a giant sculpture to commemorate him.。
neverland
In 1988 MaiKeJieKeXun took seventeen million buy this a person of extraordinary powers curtilage, covering 3400 square meters, there are many large recreation equipment, he often and some children play, in which after his death, the manor is being put up for sale, $50 million worth $~ 1.。
died
2009.6.25 MaiKeJieKeXun died in Los Angeles at age 50, his home. The police are sure he is killed, his personal doctor Morray Conrad has great suspicion because he MaiKeJieKeXun injection too much to heart attacks and tranquilizer led to his death.。
Read 2009.7.7 his condole of Loving with ceremony, In Jackson, Michael King of Pop In Los Angeles at, at the ceremony he was awarded "world history's most successful artist" title, global more than 31 million people watching.。
hrm-2型,能合成黑色素的无毛小鼠,“小鼠”就是它的学名。
无毛小鼠(Hairless mice)是一种皮肤和毛发结构发生遗传突变(14号染色体隐性突变)的小鼠,是皮肤病学研究中有用的实验材料。
the
Chinese
ancient
silk
hair
commonly
is
unique
JiZhong
place,
"color"
is
the
main
characters
commonly
silk
hair.
"Color"
phenotype
and
the
synthesis
of
melanin,
body
and
diffusion.
Silk
hair
tonic
and
medicinal
value
of
commonly
with
the
body
of
melanin.
Extensive
melanin
deposition
is
the
important
economic
characters
commonly
peculiar.
Silk
hair
melanin
is
in
commonly
tyrosine
nitration
under
the
action
of
enzyme,
after
series
of
biochemical
reactions,
which
formed
by
the
synthetic
genetic
control.
Phenylalanine
in
animals
can
phenylalanine)
under
the
action
of
the
enzyme
transformed,
phenylalanine
tyrosinase
in
certain
extent
can
also
be
converted
to
melanin.
Therefore,
tyrosine
and
phenylalanine
is
also
called
melanin
precursors
of
amino
acids.
But
the
silk
hair
grows
slowly,
weight
less
commonly,
egg
performance
is
poor,
meat
performance,
feed
conversion
rate
is
low,
cause
the
melanin
deposition
of
molecular
regulation
mechanism
of
complex.
Now
uriah
to
commonly
"color"
research
focuses
on
the
melanin,
distribution,
structure,
etc.
Researchers
in
the
phenotype,
commonly
silk
hair
melanin
production
performance
of
synthetic
gene
polymorphism
is
studied,
the
influence
of
the
synthesis
of
melanin,
but
genes
in
the
expression
and
regulation
commonly
silk
hair,
gene
expression
of
scheduling
aspects
of
commonly
reported
little
growth
stage
in
different
periods
and
organizational
melanin
gene
expression
"color"
traits
without
relevance;
For
fodder
for
melanin
synthesis
influence
amino
acids
from
molecular
Angle.
No
research
Therefore
it
is
necessary
in
molecular
biology
technology
of
silk
commonly
melanin
the
feather
expression
related
gene
expression
of
the
characters
of
the
regulation
on
study.
This
experiment
USES
four
phenylalanine,
tyrosine
level
of
diet
fed
commonly
0-16
weeks
silk
hair,
observation
and
measurement
of
its
growth
stages
commonly
silk
hair
performance,
biochemical,
and
simulated
the
silk
hair
growth
curve
commonly,
Through
comparison
of
growth
than
card
several
stages
of
each
part
of
the
appearance
of
black
degree
of
visualizing
and
records,
from
the
appearance
Discusses
the
melanin
deposition
distribution,
Using
fluorescence
detection
quantitative
polymerase
chain
reaction
(PCR)
for
the
synthesis
of
melanin
in
three
main
effect
genes
related
gene
(TYR)
tyrosinase,
enzymatic
related
proteins
(1)
and
TYRPI
melanoma
skin
quality
receptor
(1
MC1R)
in
different
organizations,
the
expression
differences,
from
weeks
gene
expression
studies
to
explore
the
melanin
level.
Main
research
results
are
as
follows:
1,
the
production
performance
of
silk
hair
commonly
results
show
that
diet
tyrosine,
phenylalanine
level
2,
significantly,
12,
14
weeks
of
weight,
significantly
influence
the
0-2,
5-6
and
11-16
weeks,
the
significant
influence
of
plecata
0-2,
3-4,
11-12
and
15-16
weeks
of
average
intake,
significantly
affect
3-8,
11-16
weeks
of
weight
ratio,
diet
tyrosine,
phenylalanine
level
in
0.43%
0.91
and
the
experimental
1.31%,
0.77%
and
showed
relatively
good
performance.
2,
using
logistic,
Bertalanffy
von
Gompertz,
three
models
of
pure
silk
hair
the
growth
of
commonly
curve
fitting
and
analysis,
the
result
shows
that
the
model
can
simulate
logistic
commonly
silk
hair
growth.
and
serum
biochemical
index
determination
commonly
silk
hair,
the
results
show
that:
the
diet
tyrosine,
phenylalanine
level
of
serum
biochemical
index
commonly
silk
hair,
and
other
significant
effects
on
the
glucose
various
biochemical
index
effects
were
not
significant.
Different
weeks
of
silk
hair
serum
biochemical
index
commonly
were
extremely
significant
influence.
and
diet
tyrosine,
phenylalanine
level
of
silk
hair
black
degrees
commonly
on
the
distribution
of
the
skin
and
muscle
tissue,
chest
has
significant
effects
on
the
distribution
of
black,
the
appearance
of
black
organization
has
significant
effects
on
the
distribution
of
the
trachea,
internal
organization
has
significant
effects
on
the
distribution
of
black,
the
digestive
tract
of
esophageal
black
distribution
very
significant
effect,
reproductive
tissue
testicular
black
distribution
very
significant
effect.
Different
weeks
of
silk
hair
organization
distribution
of
melanin
commonly,
most
significantly
influence
tissue.
Gender
distribution
of
silk
hair
black,
commonly,
tube
and
marrow,
keel
and
glandular
stomach
significantly
influence
etc.
and
diet
tyrosine,
phenylalanine
level
of
silk
hair
MC1R
gene,
commonly
in
the
organization
TYR
gene
expression,
liver,
and
were
extremely
significant
influence
Ⅲ
treatment
groups
are
the
highest,
treatment
group
Ⅰ
relatively
low,
with
tyrosine
and
phenylalanine
additives,
and
express
quantity
TYRP1
gene
expression
of
the
bone
marrow,
processing
Ⅱ
group
has
significant
effects
on
the
top,
with
Ⅰ
relatively
low,
Different
to
the
bone
in
weeks
silk
hair
MC1R
genes
and
gene
expression,
liver
TYR
very
significant
effect,
and
is
the
highest,
about
weeks
in
eight
weeks
when
the
minimum,
Different
to
the
bone
in
weeks
silk
hair
TYRP1
gene
expression,
liver
and
bone
marrow
were
significantly
influence
in
the
liver,
the
expression,
weeks,
16
weeks
left
when
the
lowest,
in
the
bone
marrow,
from
birth
to
eight
weeks
with
increasing
while
increasing
after
weeks
and
weeks
with
increasing
while
descending,
MC1R
TYR,
TYRP1
and
gene
expression
in
the
organization
commonly
silk
hair,
skin
and
bone
marrow,
etc,
to
organize
and
express
significantly
difference,
TYRP1
gene
expression
for
the
highest,
relatively
low
relative
TYR
gene
expression.
The
diet
of
silk
hair
commonly
added
phenylalanine
and
four
levels,
tyrosine
production
performance,
the
growth
curve
fitting,
biochemical,
black
degree
contrast,
melanin
aspects
related
gene
expression
in
the
research
and
analysis
on
the
basis
of
silk
hair
melanin
made
comprehensive
commonly,
to
control
the
effect
of
chicken
melanin
deposition
gene,
for
more
reasonable
exploitation
and
utilization
of
this
precious
commonly
poultry
resources
to
provide
certain
theoretical
basis
for
chicken,
human
and
animal
studies
as
model
of
birds
and
mammals
melanin
formation
of
molecular
mechanism
of
molecular
basis
etc,
and
through
different
time
commonly
melanin
deposition
rules
and
organization
of
melanin
and
appropriate
extraction
to
provide
the
reference.
Research
results
may
reveal
commonly
"color"
properties
of
molecular
genetic
mechanism,
and
chicken
and
research
and
development
of
the
ideal
bird
genetic
pattern,
expounds
the
animal
body
melanin
deposition
mechanism
for
research
of
"color"
commonly
character
and
the
birds
melanin
formation
mechanism
has
important
significance.