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2010年4期
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为何不用淀粉酶鉴定PH对酶活性的影响
为何不用淀粉酶鉴定PH对酶活性的影响
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摘要
未填写
DOI
3j7r37xq41/3382329
作者
李星珍(淄博市张店第四中学山东淄博255071)
机构地区
【摘 要】《影响酶活性条件》的探究实验是高中生物人教版必修①中学生必修的探究实验,课本用括号注明:建议用淀粉酶探究温度对酶活性的影响,用过氧化氢酶探究PH对酶活性的影响。我想为什么不也用淀粉酶来探究PH对酶活性的影响呢?两个探究实验同时用一种溶液—H2O2溶液,准备起来简单方便,且经济。如果配置过氧化氢溶液的同时,再配置肝脏研磨液,不但增加了工作量,而且浪费。经过试验,我发现用淀粉酶探究PH对酶活性的影响试验过程中,出现了出人意料的实验现象,尽管能够解释PH对酶的活性有影响,但因为学生缺乏相应的化学知识,不容易解释明白。本人在试验的基础上找出了课本注明的原因,希望对同行老师们少走一点弯路。 【
出处
《新华教育导刊》
2010年4期
关键词
淀粉
淀粉酶
NaOH
HCI
碘&mdash
碘化钾溶液
Why
does
need
not
starch
Mao
authenticate
PH
to
influence
Mao
activity
Li
Xing-zhen
Abstract《Influence
Mao
activity
condition
》of
investigation
experiment
is
senior
high
school
living
creature
the
person
teach
a
version
a
required
①
high
school
student
required
of
investigation
experiment
lesson
origin
note
with
the
bracketsThe
suggestion
use
starch
Mao
an
investigation
temperature
to
the
Mao
activity
of
influence
once
used
to
oxidize
hydrogen
Mao
investigation
PH
to
the
Mao
activity
of
influence.Do
I
think
why
to
don't
also
influence
Mao
activity
with
the
starch
Mao
investigation
PH?Two
investigation
experiment
use
a
kind
of
aqua-H2
O2
aqua
in
the
meantime
prepare
to
be
simple
convenience
and
economy.If
allocation
lead
oxidize
hydrogen
aqua
of
in
the
meantime
again
allocation
the
liver
grind
a
liquid
not
only
increment
workload
and
waste.Has
been
experiment
I
detection
use
starch
Mao
investigation
PH
to
the
Mao
activity
of
influence
experiment
分类
[文化科学][教育学]
出版日期
2010年04月14日(中国期刊网平台首次上网日期,不代表论文的发表时间)
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7
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8
钱江龙;龚群;等.
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9
刘冰.
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10
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来源期刊
新华教育导刊
2010年4期
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相关关键词
淀粉
淀粉酶
NaOH
HCI
碘&mdash
碘化钾溶液
Why
does
need
not
starch
Mao
authenticate
PH
to
influence
Mao
activity
Li
Xing-zhen
Abstract《Influence
Mao
activity
condition
》of
investigation
experiment
is
senior
high
school
living
creature
the
person
teach
a
version
a
required
①
high
school
student
required
of
investigation
experiment
lesson
origin
note
with
the
bracketsThe
suggestion
use
starch
Mao
an
investigation
temperature
to
the
Mao
activity
of
influence
once
used
to
oxidize
hydrogen
Mao
investigation
PH
to
the
Mao
activity
of
influence.Do
I
think
why
to
don't
also
influence
Mao
activity
with
the
starch
Mao
investigation
PH?Two
investigation
experiment
use
a
kind
of
aqua-H2
O2
aqua
in
the
meantime
prepare
to
be
simple
convenience
and
economy.If
allocation
lead
oxidize
hydrogen
aqua
of
in
the
meantime
again
allocation
the
liver
grind
a
liquid
not
only
increment
workload
and
waste.Has
been
experiment
I
detection
use
starch
Mao
investigation
PH
to
the
Mao
activity
of
influence
experiment
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