Do You Want To Know About Ingenhousz Experiment?

Percobaan Ingenhousz

I.Tujuan 

1.     Membuktikan adanya gas oksigen(gelembung) sebagai hasil proses fotosintesis.

2.     Mengetahui spectrum warna yang baik untuk fotosintesis.

II. Landasan Teori

            Pada proses fotosintesis, yang terjadi pada tumbuhan berklorofil tepatnya pada jaringan tiang/palisade dan bunga karang pada mesofil daun, proses fotosintesis pada tumbuhan hijau mengubah air, gas karbondioksida, dengan bantuan cahaya dan klorofil menjadi glukosa, dan oksigen.

                  6H₂O + 6CO₂ → C₆H₁₂O₆ (glukosa) + 6O₂

            Orang yang pertama kali menemukan fotosintesis adalah Jan Ingenhousz. Fotosintesis merupakan suatu proses yang penting bagi organisme di bumi, dengan fotosintesis ini tumbuhan menyediakan bagi organisme lain baik secara langsung maupun tidak langsung. Jan Ingenhosz melakukan percobaan dengan memasukkan tumbuhan Hydrilla Verticillata ke dalam bejana yang berisi air. Bejana gelas itu ditutup dengan corong terbalik dan diatasnya diberi tabung reaksi yang diisi air hingga penuh, kemudian bejana itu diletakkan di terik matahari. Tak lama kemudian muncul gelembung udara dari tumbuhan air itu yang menandakan adanya oksigen (Kimball, 1993).

            Beberapa spktrum warna juga mempengaruhi kecepatan fotosintesis.

III. Alat dan Bahan

·      Tabung reaksi

·      Gelas beker

·      Corong

·      Kawat

·      Baskom

·      Stopwatch

·      Kertas mika (kuning, merah, hijau, biru)

·      Hyrilla (3/4)

IV. Cara kerja

1.      Masukkan 3/4 Hydrilla ke dalam corong.

2.      Masukkan  3 kawat yang sudah dibengkokkan penyangga ke dalam gelas kimia untuk menjaga keseimbangan corong yang telah diisi dengan hydrilla agar corong berada dalam posisi menggantung.

3.      Masukan gelas kimia tersebut dalam baskom berisi air, diikuti dengan memasukkan corong yang berisi hydrilla ke dalam gelas kimia, selanjutnya tutup bagian atas tabung corong dengan tabung reaksi, semua ini dilakukan di dalam air, serta usahakan agar tidak ada gelembung yang masuk dalam tabung reaksi.

4.      Letakkan gelas beker yang telah dirangkai tersebut di tempat yang terkena cahaya, kemudian dengan menggunakan stopwatch dalam tiap jangka waktu 1 menit yang dilakukan selama 5 kali, catatlah banyaknya gelembung yang dihasilkan.

5.      Bungkuslah gelas beker yang telah dirangkai dengan menggunakan kertas mika berwarna hijau, hingga semua permukaan gelas beker tertutupi kertas mika berwarna hijau, kemudian dengan menggunakan stopwatch hitunglah banyaknya gelembung yang terjadi dalam 1 menit, sebanyak 5 kali.

6.      Lakukan langkah ynag sama dengan nomor 5 namun menggunakan kertas mika kuning.

7.      Lakukan langkah ynag sama dengan nomor 5 namun menggunakan kertas mika biru.

8.      Lakukan langkah ynag sama dengan nomor 5 namun menggunakan kertas mika merah.

V. Hasil Pengamatan

           

No.	Keadaan	Jumlah Gelembung					Laju Fotosintesis rata-rata per menit
		M ke-1	M ke-2	M ke-3	M ke-4	M ke-5
1.	Kontrol	2	10	12	14	15	12,6
2.	Mika Hijau	4	5	5	7	8	5,8
3.	Mika Kuning	12	28	31	34	38	28,6
4.	Mika Biru	19	22	30	33	40	28,8
5.	Mika Merah	30	31	33	37	41	34,4

·      M = menit

VI. Analisis

            Percobaan fotosintesis menggunakan hydrilla, ternyata menghasilkan gelembung, yang merupakan gas Oksigen/O2 yang merupkan hasil dari fotosintesis, dimana oksigen terbentul karena proses fotolisis dimana air diuraikan menjadi gas oksigen dan air.

            Pada bagian kontrol, yaitu gelas beker berisi hydrilla yang terlah dirangkai dengan corong dan tabung reaksi berisi air yang diletakkan di tempat yang terkena cahaya matahari, hanya menghasilkan gelembung dalam jumlah yang tergolong sedikit, yaitu dengan rata-rata 12, 6 gelembung per menit.

            Pada gelas beker yang ditutupi kertas mika berwarna hijau, dan diletakkan di tempat yang terkena cahaya matahari, menghasilkan gelembung yag tergolong rendah juga, bahkan lebih sedkit dari kelompok pada keadaan control, yaitu hanya 5,8 gelembung per menit. Hal ini menunjukkan spectrum warna hijau tidak berperan penting dalam mempercepat proses fotosintesis.

             Pada gelas beker yang ditutupi kertas mika berwarna kuning, dan diletakkan di tempat yang terkena cahaya matahari, menghasilkan gelembung yang tergolong cukup tinggi, yaitu 26,8 gelembung per menit. Hal ini menunjukkan spectrum warna kuning berperan dalam mempercepat proses fotosintesis.

            Pada gelas beker yang ditutupi kertas mika berwarna biru, dan diletakkan di tempat yang terkena cahaya matahari, menghasilkan gelembung yag tergolong tinggi, yaitu 28,8 gelembung per menit, bahkan lebih banyak dari pada keadaan gelas beker ditutupi oleh kertas mika berwarna kuning. Hal ini menunjukkan spectrum warna biru berperan dalam mempercepat proses fotosintesis.

            Pada gelas beker yang ditutupi kertas mika berwarna merah, dan diletakkan di tempat yang terkena cahaya matahari, menghasilkan gelembung yang paling tinggi dibandingkan pada keadaan, yaitu 34,4 gelembung per menit. Hal ini menunjukkan spectrum warna merah berperan penting dalam mempercepat proses fotosintesis.

VII. Kesimpulan

            Dari Percobaan ini, dapat disimpulkan bahwa dalam proses fotosintesis dihasilkan oksigen, dimana salam Percobaan ini dapat dilihat dalam bentuk gelembung yang terbentuk. Selain itu, spectrum warna juga mempengaruhi kecepatan fotosintesis, serta banyaknya gas oksigen yang dihasilkan. Melalui Percobaan ini, dapat diketahui bahwa spectrum warna yang dari yang terbaik ke terburuk dalam mempercepat proses fotosintesis adalah merah, diikuti biru, dan kuning, dan yang tidak mempercepat proses fotosintesis adalah warna hijau.

VII. Daftar Pustaka

            Aryulina, Diah,dkk. 2007. Biologi 3. Jakarta : esis

            Deyasmadani, 2010 percobaan ingenhousz, http://deyasmadani.blogspot.co.id/2010/04/percobaan-ingenhousz.html

Ukuran Bahagia

            Tayangan di televisi itu membuatku berpikir, lalu kalau aku menjadi dia apa aku akan merasa bahagia? Pikirku setelah menyaksikan tayangan seseorang memenangkan uang sebesar 1 miliyar rupiah dari sebuah acara di televisi.

            Apa aku akan bahagia jika aku memiliki 1 miliar rupiah? Lalu, apakah kebahagiaan dapat diukur dengan uang? Banyak orang mengatakan bukan, uang bukan sumber kebahagiaan, justru uang akan membuat kita tidak puas dan akhirnya menjadi serakah. Banyak orang berkata keluarga adalah kebahagiaan mereka, apakah keluarga dapat dijadikan ukuran kebahagiaan? Lalu, bagaimana dengan mereka yang berada dalam keluarga yang "broken home" atau tidak utuh lagi? Sebagian orang juga mengatakan kebahagiaan mereka berdasarkan barang, jika mereka memiliki barang bermerk maka mereka akan merasa bahagia.

            Saat merasa senang, kita tertawa. Saat merasa sedih, kita menangis. Namun ada juga, tangisan kebahagiaan, menangis karena terharu, terlalu bahagia. Mengapa tangisan yang biasanya melambangkan kesedihan justru dapat juga menjadi reaksi orang karena terlalu bahagia? Menurutku, hal tersebut disebabkan karena realsi orang terhadap suatu kejadian berbeda-beda. Lalu aku kembali berpikir, mungkin persepsi atau ukuran bahagia setiap orang juga berbeda-beda. Misalkan saja seorang anak mendapat nilai 99 dalam ulangan matematika yang dapat dikerjakannya dengan mudah membuatnya merasa sedih, karena merasa tidak puas akan pencapaiannya yang seharusnya dapat menjadi sempurna yaitu nilai 100, sedangkan ada seorang anak yang mendapat nilai 76 dalam ulangan matematika yang dianggapnya sulit namun ia merasa bahagia dan bersyukur karena nilai tersebut pas sekali kkm, sehingga ia tidak perlu remedial. Tentu jika dilihat dari segi nilai, nilai 99 jauh lebih tinggi dibanding nilai 76, lalu mengapa anak yang mendapat nilai 99 bersedih, tetapi anak yang mendapat 76 bersyukur dan berbahagia? Dari contoh diatas dapat dilihat bahwa persepsi bahagia setiap orang seperti kepribadian dan sikap tiap-tiap orang adalah berbeda-beda.

            Oleh karena itu, janganlah kita membuat tolak ukur kebahagiaan untuk semua orang atau menyama-nyamakan kebahagiaan kita dengan orang lain, karena seperti setiap orang memiliki kepribadian yang berbeda-beda, begitu juga dengan persepsi kebahagiaan setiap orang juga berbeda-beda. 

            Untuk itu, temukanlah hal-hal yang membuat kita bahagia dengan cara-cara kita sendiri, karena kebahagiaan adalah perasaan yang kita rasakan, dan bukan yang orang lain rasakan.

Let's be happy!

Happy birthday Ariel Latasha

Ariel Latasha is turning seventeen

         Tasha is one of my best friend that I can always count on. We used to be in the same class, from grade 10 and grade 11. Actually, I have known her since grade 7 since we were in the same class, but we didn't really hang with each other those days. I remember that i went to her house with some of my friends to work on our bio project, and i remember I met her younger brother, Aubert. He was really cute and adorable.

         Then, when we were on grade 10, in MINIONS X-6, I was again meet Tasha as my classmate. Then we started to become bestie, I don't really know why, but it is a huge possibility it was because of the K-drama fever! Hahaha as we both tend to watch a lot of Korean dramas. Just so you know, Tasha is really good with storytelling, especially when it comes to k-drama with twisted plot. I recall she would draw some stick men and women then made a family tree or drawing lines to connect them, as she started to story tell it is amazing that she could remember all the plot and the characteristic of the actors.

         In grade 10, I also become bestie with Dibonthy(Dianti) hehehehe, maybe I should do one for Dibo too!

         So, Dibon, me, Tasha, and Rosa(Jogjaaaa) we sort of made a name which was the parts of or names that we gather

DIanti NAOmi taSHA ROSa

DINAOSHAROS

Ain't it kinda sound like dinosaur?

our signature DINAOSHAROS pose

         In grade 11, I was again, in the same class with Tasha! Then the sleepover rituals begin at Tasha's, usually we made a plan to hang in MKG as it is near Tasha's house. But mostly, i ended having unplanned sleepover at her's

        

 



Things we usually   do :

        While in class, ofc we studied and pay attention to the teacher, discussing about the materials, doing our hws. OR NAAAH!

Yea most of the time we daydream and designing our future,

Started with what would you like to do when u grow up? What things would you like to have? What kind of guy would you like? What if we were able to meet So Ji Sub? Or when will we do pampering day?-> Tasha always brought this up but we ended up having none, at least hitherto, but we should someday, totally should!

        Some of the times, the classic me and Tasha thing is that I will start to annoy her and she will just stare at me with her poker face and I started to laugh or annoy her again, but usually I ended up breaking her things, the last think i ruined was her pencil case's zipper(LOL, sosorry sha) however, she could be dummy too sometimes hahaha

I am super grateful to have a bestie like Tasha, here's to more stupid yet memorable times to come!

         Cos it is really time to reach our dream, enough with the planning!

Happpppppppppppppppppy belated birthday shaaa/ tigress!

Thank you for the superb dinner!

Wishing you all the very best in life!

Semoga nanti dapet suami CEO!

Tapi sebelumnya semoga keterima di uni yang diidamidamkan dan jurusan yang paling Top!

Xoxo, L+/-FE

Be A Grown, and Save Lifes!

On early October 2015, i participated in saving other's life!

Be a grown safe lives

I participated in saving life!
But how? Am i brave enough to defeat my own country in a war?
Hmm..
Apparently i decided to do it in another way, much safer way,
By DONATING MY BLOOD


             In the event of the reunion day from the alumni of Saint Ursula High School from year 1990, they made this Blood Donation event :)

             I personally think that, it was a really brilliant yet unique idea plus it is done for a good cause too...

             First stage of this reunion started as they gathered us in the hall in our school, then they explained about they reunion celebration, they also explain the main concern in this ceremony is the blood donation.
P.s. From hearing their explanation, as they said that donating your blood is a good work plus it is good for ourselves too, as we would be able to renew our blood cells, which will make us healthier. My bio teacher, who apparently has been participated in blood donation for about 64 times, she said that it is a good thing to do plus it benefited our own body too.

                                                               So then I think, why not?

On the blood donation day...

One of the reason i want to join this blood donation is also because i wanted to know and make sure what is my real blood type, cause it was kind of ambiguous between B or AB when i did my own test at the lab for bio Experiment.
        First, I was scared as i recall my friend, Irene told me during recess that the injection diameter will be huge! The other thing that made me nervous was that i haven't eaten proper breakfast that morning.
        The procedure lasts for about one and a half hours.

1. We have to fill the application form about our basic information such as name, phone number, address, allergies, etc.

2. We wait up in a line to be checked. They checked our blood type, hemoglobin, and our blood tension. Then they will determine werher you will be able to donate or not. You must not be in your period!

3. If we are able to donate they will give us this little coupon that said "CONGRATULATION! You are able to donate,...." (Then we can trade the coupon with goodie bag full of snacks) and if you are not able to donate on that day, they will still give you a coupon but it will say "CHEER UP! there will still be next time,..." (And even you can not donate your blood on that day, they will still give you goodie bag with snacks)

4. The subsequent step is to wait until they call your name to start your donation. While waiting for the call, i had a chat with my friends. Long story short, although it felt good to just have a chat, but i was feeling that something is not right, as I guessed i have been waiting for too long, then my other friend came and asked me "Haven't you donated yet?" And I said "No, it started to feel like forever." Then she realized something weird "Didn't you gave the coupon, so they can add you up to the line?" OH,NO! it was like I didn't even put my name on the list from the start! Then, i rushed to the. Crew and get me on the line.

5. The next thing I now was that i saw some of my friends who were just donated their blood, faint or semi faint. Of course I was nervous when I saw that coming. But somehow I manage to keep my valiant side, and say to myself to remain calm. The moment finally came, i was called to do the donation. To be honest, I wouldn't say that it didn't hurt, but I do think that it is bearable and it is definetely worth the pain.

6. Try to relax your self. Don't do too much activities or anything aggressive. So, I decided to eat popmie with my friend from the goodie bag that I received.

P.S. Do not do any too-much-significant-gesture such as practicing your dance because it will affect you in some unpleasant way!

           I got a terrible headache because of doing the dance practice about an hour after the blood donation, then i ended up sleeping till evening and wasn't able to come to my friend's b'day dinner :(


But overall, I do recommend to donate your blood, because it is a good thing both for others and our own self!

xoxo, L+/-FE

Laper+Baper

Laper = Baper + L           

Baper = Laper + B

Laper + Baper = ?

I want to remind you that no matter how laper + baper
 Do Not Eat your Boogers 

Classification of Laper Baper

I.  Laper Baper siang hari

a pict of flower that u took on a valentine's day
could remind you the fact that
you are still single
that could lead to baper
then there is a scientific fact
that shows sad people tend to use a lot of energy
which could lead to hunger
in conclusion, a pict of flower
could lead to laper +baper

Pernah ga sih ngerasa 10 menit lagi bel istirahat tapi sekarang udah laper banget, dan udah gatau guru juga ngomong apa, temen juga udah ga ada yang bisa diganggu cos they are all feeling the same way as you are. Then when you reach that stage of hunger, you began to wish for better things to happen, by simply imagining :

1. What if I am not stuck in this class.

2. What if right now i can actually eat something?

3. What would be better is that someone buy me some 'mpek-mpek' or  'martabak coklat' or 'kkuldak' or 'talas goreng' or 'es teler' or KFC or salmon fried rice (i usually begin to crave for food when i reach this stage)

4. What if a goodlooking guy happen to give meone of those food?

After few of what ifs then you look up at the clock then it usually will not show a significant change, so i warn you, not to hang your hope too high i bet it will only change about 1/2 mins or 3 mins

II. Laper Baper Malam Hari

this pict could definitely lead to laper +baper

Late at night laper baper
The question i often ask my self
"Why do i get hungry 24/7?"
Then i made a quote to my own thoughts
Some girls are destined to be skinny and pretty and the other are destined to help others to make profits (by buying their snacks and food)

In the middle of the night, stalking on peps social meds with headphones on playing shuffled songs on itunes
Suddenly found photos of others with their special somebody or people i used to be close with, then just suddenly just like any chessy movies the song changed into a slow yet kinda heartbreaking song, ofc some of the nights, had made me think of the what ifs, but i know this is the atrocious yet pathetic what ifs so, the best way to qonquer this kinda 'laper-baper' stage is
Changing the song into a full of beat song and happy themed song, tell yourself that what past is past, Life goes on!

Or simply by seeing your friends's snapchat story with their boyfriends
And wonder when is your turn coming? Kapan-kapan. Ha!
From my point of view observing my friends behavior, i can conclude that it is amazing what love can or change a person, the fact is that i have never seen her behaved like that before, not even in my imagination, but then once she is in love, she does those kind of girly,dreamy,little laughs just at the mention of her special someone name, or just looking at her phone:) i am truly happy for them

III. Laper Baper Tidak Mengenal Waktu

This one is the Strangest Laper Baper
Nonton the return of superman, watching all the cutie kids just makes you want to have children! Hahaha


xoxo. L+/-FE