shimi&life - میکروسکوپ الکترون روبشی
شنبه 3 دی 1390

میکروسکوپ الکترون روبشی

شنبه 3 دی 1390

نوع مطلب :
نویسنده :zahra mohammadi


در میکروسکوپ الکترونی روبشی (SEM) هم مانند میکروسکوپ الکترونی عبوری (TEM)، یک پرتو الکترونی به نمونه می‌تابد. درنتیجه بعضی قسمت‌ها نظیر تفنگ الکترونی، عدسی‌های متمرکزکننده و سیستم خلأ، در هر دو دستگاه مشابه است. اما روش تشکیل تصویر و نحوه بزرگنمایی کاملاً متفاوت است. علاوه بر این، TEM اصولاً برای مطالعه ساختار نمونه‌های حجیم درسطح یا نزدیکی سطح، استفاده می‌شود. درک این نوع تصویر بسیار آسان‌تر از تصویر الکترونی عبوری است.

cheap phone psychics
دوشنبه 20 شهریور 1396 04:01 ق.ظ
این پاراگراف واقعا جالب است که کاربران جدید وب را، که مایل به وبلاگ نویسی هستند، کمک می کند.
anonymous std testing
یکشنبه 19 شهریور 1396 09:19 ب.ظ
سلام، من فکر می کنم وبلاگ شما می تواند سازگاری مرورگر اینترنت باشد
مشکلات هر وقت نگاهی به وب سایت شما در Safari می اندازم، به نظر می رسد خوب است
با این حال هنگام باز کردن در اینترنت اکسپلورر، برخی از مسائل همپوشانی وجود دارد.
من فقط می خواستم به شما یک سر سریع سر بزنم! جدا از آن، وبلاگ عالی!
cheap phone psychic reading
یکشنبه 19 شهریور 1396 08:46 ب.ظ
با تشکر از حمایت از به اشتراک گذاری چنین تفکر غلط، پاراگراف لذت بخش است، به همین دلیل من آن را به طور کامل خوانده است
چهارشنبه 15 شهریور 1396 05:15 ب.ظ
I've been browsing online greater than 3 hours today,
yet I by no means discovered any interesting article like
yours. It is pretty value sufficient for me. Personally,
if all webmasters and bloggers made just right content as you probably did, the internet will probably be a lot more useful than ever before.
chaturbate com token hack key
یکشنبه 5 شهریور 1396 01:57 ق.ظ
Hi there, I do believe your web site may be having web browser compatibility problems.
Whenever I take a look at your blog in Safari, it looks fine however when opening in Internet
Explorer, it has some overlapping issues. I simply wanted to provide you with a quick
heads up! Besides that, great site!
دوشنبه 16 مرداد 1396 10:56 ب.ظ
I do consider all of the concepts you have introduced to your post.

They are very convincing and will definitely work.

Still, the posts are too quick for beginners. May you please prolong them a bit from
next time? Thank you for the post.
Foot Pain
دوشنبه 16 مرداد 1396 07:00 ق.ظ
I'm not sure exactly why but this blog is loading very slow for me.

Is anyone else having this issue or is it a problem on my end?
I'll check back later and see if the problem still exists.
Foot Complaints
دوشنبه 9 مرداد 1396 04:58 ب.ظ
I've been surfing online more than 4 hours today, yet I never found
any interesting article like yours. It is pretty
worth enough for me. In my opinion, if all webmasters and bloggers made good
content as you did, the net will be a lot more useful than ever
How does Achilles tendonitis occur?
یکشنبه 8 مرداد 1396 10:33 ق.ظ
Hello! I simply wish to give you a huge thumbs up for your
excellent info you've got here on this post. I am
returning to your web site for more soon.
Foot Issues
یکشنبه 8 مرداد 1396 09:52 ق.ظ
I think the admin of this web site is genuinely working hard
in support of his web page, as here every stuff is quality
based stuff.
Can exercise increase your height?
شنبه 7 مرداد 1396 10:43 ب.ظ
Good post. I learn something new and challenging on websites I stumbleupon every day.
It will always be exciting to read content from other authors
and use something from other web sites.
یکشنبه 4 تیر 1396 10:20 ب.ظ
Hey there, You've done an excellent job. I will certainly digg it and for my part recommend to my friends.

I am confident they'll be benefited from this website.
دوشنبه 18 اردیبهشت 1396 08:18 ق.ظ
You can definitely see your skills in the
paintings you write. The arena hopes for more passionate
writers like you who aren't afraid to mention how they believe.
All the time follow your heart.
پنجشنبه 24 فروردین 1396 10:48 ب.ظ
whoah this blog is magnificent i like reading your posts.
Stay up the great work! You recognize, lots of persons are searching around for this info,
you could help them greatly.
سه شنبه 15 فروردین 1396 08:18 ب.ظ
This web site definitely has all the information I needed concerning this subject and didn't
know who to ask.
یکشنبه 13 فروردین 1396 05:40 ب.ظ
I loved as much as you'll receive carried out right here. The sketch is tasteful,
your authored subject matter stylish. nonetheless, you command get got an impatience over that you wish be delivering the
following. unwell unquestionably come further formerly again since exactly the same nearly very often inside case you shield this hike.