Umroh November - Di jaman yang serba modern dan orang-orangnya memiliki aktivitas segunung seperti saat ini, hal-hal yang praktis menjadi yang paling dicari untuk memenuhi kebutuhan. Salah satunya ditunjukkan dengan semakin banyaknya produk-produk instan, terutama dalam hal makanan dan minuman.

Tak hanya vitamin yang dikemas praktis dalam bentuk suplemen, minuman seperti jus buah pun telah banyak diproduksi dalam kemasan. Hal ini tentu memudahkan karena tak membuat orang repot membuat jus buah sendiri dan bisa dikonsumsi sambil mengerjakan hal lainnya.

Namun, di balik semua kepraktisan yang ditawarkan oleh produk-produk minuman jus buah, apakah jus dalam kemasan tersebut cukup sehat untuk dikonsumsi? Kita tahu bahwa semua makanan kemasan pasti mengandung bahan pengawet. Bagaimana kita mengetahui bahwa jus tersebut dibuat dari buah asli dan nutrisi di dalamnya masih utuh?

Boldsky (18/03) memberikan beberapa cara untuk membantu Anda menentukan apakah jus buah kemasan yang Anda beli di swalayan cukup sehat untuk dikonsumsi dan membandingkannya dengan jus buah asli, berikut ini.

1. Baca labelnya
Semua jus buah kemasan pasti memiliki gambar buah-buahan segar di kemasannya. Namun jangan tertipu dengan gambar yang mengundang selera itu. Anda hanya perlu menemukan tulisan dalam kemasan tersebut. Pastikan dalam kemasan tersebut tertulis jelas "jus buah" dan bukannya "minuman buah." Jika yang Anda beli bertuliskan "minuman buah" sudah jelas yang ada di dalamnya bukan jus buah yang Anda harapkan.

2. Baca komposisi
Apa yang diharapkan seseorang ketika membeli jus buah kemasan? Mereka tentu berharap di dalamnya terdapat jus buah. Namun sayangnya tak semua jus buah kemasan semacam itu. Yang ada di dalamnya adalah air, konsentrat buah, dan penambah rasa yang akan memberikan rasa buah yang Anda inginkan. Belum lagi ditambah dengan mineral dan vitamin, serta tambahan pemanis buatan, sirup gula, dan pengawet.

3. Bandingkan rasa
Indera perasa manusia tak bisa berbohong. Lakukan tes sederhana untuk membandingkan rasa jus buah sungguhan yang Anda buat sendiri dengan jus buah kemasan yang Anda beli. Anda akan menyadari perbedaan rasa dari keduanya. Tinggal pilih mana yang paling Anda sukai.

4. Bandingkan masa kedaluwarsa
Berapa lama jus buah segar bisa bertahan lama? Tak lebih dari beberapa jam atau seharian. Bahkan faktanya, jus buah segar harus segera diminum dalam hitungan menit agar mendapatkan manfaat optimal di dalamnya. Sementara itu, jus buah kemasan bisa bertahan hingga sembilan bulan sampai satu tahun. Apakah mungkin jus buah kemasan ini asli? Anda sudah tahu jawabannya.

5. Cari bulir buah di dalamnya
Salah satu keunggulan jus buah yang asli adalah dari bulir buah yang ada di dalamnya. Tak ada jus buah kemasan yang mengandung bulir buah lebih banyak dari jus buah asli. Proses pengemasan jus buah akan mengambil semua manfaat kesehatan yang ada di dalamnya. Yang tersisa hanya kalori dan gula.

Poin-poin di atas sangat jelas dan bersifat mendasar. Semua orang tentu bisa mengerti mengapa jus buah kemasan tak lebih sehat dibandingkan dengan jus buah asli. Jika menginginkan manfaat terbaik dari buah, lebih baik pilih jus buah segar yang asli dibandingkan dengan kemasan. Akan lebih baik lagi jika Anda makan buah secara utuh, karena menjadikannya jus akan mengurangi nutrisi dan vitamin di dalamnya.

Editor : Maulana Lee

Sumber :

Benarkah jus buah dalam kemasan menyehatkan?

Though Robin and Joan Rolfs owned two rare talking dolls manufactured by Thomas Edison’s phonograph company in 1890, they did not dare play the wax cylinder records tucked inside each one.

The Rolfses, longtime collectors of Edison phonographs, knew that if they turned the cranks on the dolls’ backs, the steel phonograph needle might damage or destroy the grooves of the hollow, ring-shaped cylinder. And so for years, the dolls sat side by side inside a display cabinet, bearers of a message from the dawn of sound recording that nobody could hear.

In 1890, Edison’s dolls were a flop; production lasted only six weeks. Children found them difficult to operate and more scary than cuddly. The recordings inside, which featured snippets of nursery rhymes, wore out quickly.

Yet sound historians say the cylinders were the first entertainment records ever made, and the young girls hired to recite the rhymes were the world’s first recording artists.

Year after year, the Rolfses asked experts if there might be a safe way to play the recordings. Then a government laboratory developed a method to play fragile records without touching them.


The technique relies on a microscope to create images of the grooves in exquisite detail. A computer approximates — with great accuracy — the sounds that would have been created by a needle moving through those grooves.

In 2014, the technology was made available for the first time outside the laboratory.

“The fear all along is that we don’t want to damage these records. We don’t want to put a stylus on them,” said Jerry Fabris, the curator of the Thomas Edison Historical Park in West Orange, N.J. “Now we have the technology to play them safely.”

Last month, the Historical Park posted online three never-before-heard Edison doll recordings, including the two from the Rolfses’ collection. “There are probably more out there, and we’re hoping people will now get them digitized,” Mr. Fabris said.

The technology, which is known as Irene (Image, Reconstruct, Erase Noise, Etc.), was developed by the particle physicist Carl Haber and the engineer Earl Cornell at Lawrence Berkeley. Irene extracts sound from cylinder and disk records. It can also reconstruct audio from recordings so badly damaged they were deemed unplayable.

“We are now hearing sounds from history that I did not expect to hear in my lifetime,” Mr. Fabris said.

The Rolfses said they were not sure what to expect in August when they carefully packed their two Edison doll cylinders, still attached to their motors, and drove from their home in Hortonville, Wis., to the National Document Conservation Center in Andover, Mass. The center had recently acquired Irene technology.


Cylinders carry sound in a spiral groove cut by a phonograph recording needle that vibrates up and down, creating a surface made of tiny hills and valleys. In the Irene set-up, a microscope perched above the shaft takes thousands of high-resolution images of small sections of the grooves.

Stitched together, the images provide a topographic map of the cylinder’s surface, charting changes in depth as small as one five-hundredth the thickness of a human hair. Pitch, volume and timbre are all encoded in the hills and valleys and the speed at which the record is played.

At the conservation center, the preservation specialist Mason Vander Lugt attached one of the cylinders to the end of a rotating shaft. Huddled around a computer screen, the Rolfses first saw the wiggly waveform generated by Irene. Then came the digital audio. The words were at first indistinct, but as Mr. Lugt filtered out more of the noise, the rhyme became clearer.

“That was the Eureka moment,” Mr. Rolfs said.

In 1890, a girl in Edison’s laboratory had recited:

There was a little girl,

And she had a little curl


Right in the middle of her forehead.

When she was good,

She was very, very good.

But when she was bad, she was horrid.

Recently, the conservation center turned up another surprise.

In 2010, the Woody Guthrie Foundation received 18 oversize phonograph disks from an anonymous donor. No one knew if any of the dirt-stained recordings featured Guthrie, but Tiffany Colannino, then the foundation’s archivist, had stored them unplayed until she heard about Irene.

Last fall, the center extracted audio from one of the records, labeled “Jam Session 9” and emailed the digital file to Ms. Colannino.

“I was just sitting in my dining room, and the next thing I know, I’m hearing Woody,” she said. In between solo performances of “Ladies Auxiliary,” “Jesus Christ,” and “Dead or Alive,” Guthrie tells jokes, offers some back story, and makes the audience laugh. “It is quintessential Guthrie,” Ms. Colannino said.

The Rolfses’ dolls are back in the display cabinet in Wisconsin. But with audio stored on several computers, they now have a permanent voice.

Ghostly Voices From Thomas Edisonís Dolls Can Now Be Heard

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