Bahaya Minum Teh ais

boyagombak

Bahaya Minum Teh Ais....waaaaaaa!!!!!

Tahukah anda, disebalik kenikmatan dan kebaikan teh yang diperkatakan itu, teh ais menyimpan potensi yang membahayakan kesihatan. Sebuah kajian yang dilakukan oleh Loyola University Chicago Stritch School of Medicine menunjukkan bahawa kekerapan mengambil teh ais secara berlebihan boleh meningkatkan risiko menderita penyakit batu karang.



Seperti dipetik dari akhbar Times of India, teh ais mengandungi kuantiti dan konsentrasi tinggi oksalat (oxalate acid), salah satu bahan kimia utama yang membantu dalam pembentukan batu karang.

“Bagi mereka yang memiliki kecenderungan sakit batu ginjal,  teh ais secara jelas menjadi minuman terburuk,” kata Dr John Milner, pembantu profesor di Department Urology, yang turut membantu dalam kajian itu.

Milner mengatakan, teh panas juga sebenarnya menyimpan kesan buruk yang sama. Hanya saja, penyediaan dan penyajian teh panas biasanya lebih sedikit kuantitimya. Secara logiknya pula , orang meminum teh panas tidak akan sebanyak bila meminum teh ais. Sangat jarang orang mengambil teh panas ketika haus. Berbeza dengan teh ais, di mana banyak orang sanggup meminumnya lebih dari segelas ketika haus dan cuaca panas.

Oleh sebab itu, Milner menyarankan agar mereka ini menggantikan pengambilan minuman itu dengan air kosong, atau mencampurnya dengan limau. “Limau kaya dengan kandungan citrates, yang dapat menghambat pertumbuhan batu karang,” kata Milner.

Batu karang adalah kristal kecil yang terbentuk dari mineral dan garam yang biasanya ditemui dalam peluh, ginjal atau saluran kencing. Mineral tak terpakai itu umumnya akan keluar dari tubuh bersama urin, tetapi dalam keadaan tertentu boleh mengendap dan membatu di dalam saluran kencing.

Para pengkaji juga menyenaraikan sejumlah makanan lain yang berpotensi mendatangkan bahaya kesihatan. Mereka antara lain menyenaraikan: bayam, coklat, kekacang, garam, dan daging.

Sebaiknya, pengambilan teh ais dan makanan-makanan itu diambil secara sederhana demi kesihatan ginjal. Sertakan pula pengambilan itu dengan makanan tinggi kalsium yang dapat mengurangkan oksalat dalam tubuh. Dan, tentu saja perbanyakkan meminum air kosong.

siputsedut

wahhhh..baru tau tq for sharing...

fida75

insaf  kejap.. gud info... thanks

boyagombak

Apa itu Oksalat Asid
Oxalic acidFrom Wikipedia, the free encyclopedia

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Oxalic acid
IUPAC name[hide] oxalic acid
Other names[hide] ethanedioic acid
Identifiers
CAS number	144-62-7 Y
PubChem	971
ChemSpider	946 Y
UNII	9E7R5L6H31 Y
EC number	205-634-3
UN number	3261
DrugBank	DB03902
KEGG	C00209 Y
MeSH	Oxalic+acid
ChEBI	CHEBI:16995
ChEMBL	CHEMBL146755 N
RTECS number	RO2450000
ATCvet code	QP53AG03
Beilstein Reference	385686
Gmelin Reference	2208
3DMet	B00059
Jmol-3D images	Image 1
[size=105%] SMILES [show] C(=O)(C(=O)O)O
[size=105%] InChI [show] InChI=1S/C2H2O4/c3-1(4)2(5)6/h(H,3,4)(H,5,6) Y Key: MUBZPKHOEPUJKR-UHFFFAOYSA-N Y
Properties
Molecular formula	C2H2O4
Molar mass	90.03 g mol−1
Exact mass	89.995308552 g mol-1
Appearance	White crystals
Density	1.90 g cm-3
Melting point	189-191 °C, 462-464 K, 372-376 °F
Solubility in water	90 g dm-3 (at 20 °C)
Acidity (pKa)	1.25, 4.14[1]
Hazards
MSDS	External MSDS
NFPA 704	1 3 0
Flash point	166 °C
Related compounds
Related compounds	oxalyl chloride disodium oxalate calcium oxalate phenyl oxalate ester
N(what is this?)  (verify) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
[url=http://en.wikipedia.org/wiki/Wikipediahemical_infobox#References]Infobox references[/url]

boyagombak

sambungan Oksalat asid
Oxalic acid is an organic compound with the formula H2C2O4. This colourless solid is a dicarboxylic acid. In terms of acid strength, it is about 3,000 times stronger than acetic acid. Oxalic acid is a reducing agent and its conjugate base, known as oxalate (C2O42−), is a chelating agent for metal cations. Typically oxalic acid occurs as the dihydrate with the formula C2O4H2·2H2O.

Contents[hide] 1 Preparation 1.1 Laboratory methods 2 Structure 3 Reactions 4 Occurrence in nature 5 Applications 5.1 Extractive metallurgy 5.2 Miscellaneous uses 6 Safety 7 References 8 External links

[edit] Preparation
Oxalic acid is mainly manufactured by the oxidation of carbohydrates or glucose using nitric acid or air in the presence of vanadium pentoxide. A variety of precursors can be used including glycolic acid and ethylene glycol.[2] A newer method entails oxidative carbonylation of alcohols to give the diesters of oxalic acid:4 ROH + 4 CO + O2 → 2 (CO2R)2 + 2 H2O
These diesters are subsequently hydrolyzed to oxalic acid. Approximately 120M kg are produced annually.[3][edit] Laboratory methods
Although it can be readily purchased, oxalic acid can be prepared in the laboratory by oxidizing sucrose using nitric acid in the presence of a small amount of vanadium pentoxide as a catalyst.[4]
The hydrated solid can be dehydrated with heat or by azeotropic distillation.[5]
Of historical interest, Wöhler prepared oxalic acid by hydrolysis of cyanogen in 1824. This experiment may represent the first synthesis of a natural product.[3][edit] Structure
Anhydrous oxalic acid exists as two polymorphs; in one the hydrogen-bonding results in a chain-like structure whereas the hydrogen bonding pattern in the other form defines a sheet-like structure.[6] Because the anhydrous material is both acidic and hygroscopic (water seeking), it is used in esterifications.

boyagombak

sambungan lagi

Structure
Anhydrous oxalic acid exists as two polymorphs; in one the hydrogen-bonding results in a chain-like structure whereas the hydrogen bonding pattern in the other form defines a sheet-like structure.[6] Because the anhydrous material is both acidic and hygroscopic (water seeking), it is used in esterifications.[edit] Reactions
Oxalic acid is a relatively strong acid, despite being a carboxylic acid2O4H2 → C2O4H− + H+; pKa = 1.38 C2O4H− → C2O42− + H+; pKa = 4.28
Oxalic acid undergoes many of the reactions characteristic of other carboxylic acids. It forms esters such as dimethyl oxalate (m.p. 52.5–53.5 °C).[7] It forms an acid chloride called oxalyl chloride.
Oxalate, the conjugate base of oxalic acid, is an excellent ligand for metal ions, e.g. the drug oxaliplatin.
Oxalic acid and oxalates can be oxidized by permanganate in an autocatalytic reaction.[8][edit] Occurrence in nature
Oxalic acid and oxalates are present in many plants and occur naturally in animals. Calcium oxalate is the most common component of kidney stones. Early investigators isolated oxalic acid from wood-sorrel (Oxalis). Its presence makes it dangerous to eat unripe carambola or monstera fruits. Members of the spinach family are high in oxalates. Rhubarb leaves contain about 0.5% oxalic acid and Jack-in-the-Pulpit (Arisaema triphyllum) contains calcium oxalate crystals. Bacteria produce oxalates from oxidation of carbohydrates.[3][edit] Applications
Oxalic acid's main applications include cleaning or bleaching, especially for the removal of rust, e.g. Bar Keepers Friend is an example of a household cleaner containing oxalic acid. About 25% of produced oxalic acid is used as a mordant in dyeing processes. It is used in bleaches, especially for pulpwood.[3][edit] Extractive metallurgy
Oxalic acid is also an important reagent in lanthanide chemistry. Hydrated lanthanide oxalates form readily in strongly acidic solutions in a densely crystalline easily filtered form, largely free of contamination by non-lanthanide elements. Lanthanide oxalates figure importantly in commercial processing of lanthanides, and are used to recover lanthanides from solution after separation. Upon ignition, lanthanide oxalates convert to the oxides, which are the most common form in which the lanthanides are marketed.[edit] Miscellaneous uses
Oxalic acid is used in the restoration of old wood. Its reducing properties are used in platinotype, the early photographic platinum/palladium printing process. Oxalic acid is also used for cleaning 'grubbyness' from dirty leather to get back to the flesh of the leather, before reintroducing preservatives.
Vaporized oxalic acid, or a 3.2% solution of oxalic acid in sugar syrup, is used by some beekeepers as a miticide against the parasitic varroa mite.
Oxalic acid is rubbed onto completed marble sculptures to seal the surface and introduce a shine.[edit] Safety
In humans, oxalic acid has an oral LDLo (lowest published lethal dose) of 600 mg/kg.[9]

boyagombak

What is Oxalic Acid?

Oxalic acid is a colorless, organic compound that occurs naturally in plants, animals and in humans.  Organic oxalic acid is an important element, even essential, to maintain and to stimulate peristaltic motion in our body.

It is when oxalic acid is cooked or processed that it becomes dead, or inorganic and thus harmful to our body.

Oxalic acid readily combines with calcium.  If both oxalic acid and calcium are organic at the point of combination, the result is beneficial where the oxalic acid helps the digestive assimilation of the calcium.  At the same time, this combination helps stimulate the peristaltic functions in our body.

It is only when the oxalic acid has become inorganic because it was cooked or processed, that it forms an interlocking compound with the calcium that destroys the nourishing value of both.  This results in a deficiency of calcium that causes decomposition of the bones.

When the concentration of inorganic oxalic acid is high, it may precipitate out in crystalline form.  These tiny crystals can irritate the human tissues, and get lodged in the stomach, kidneys and bladder as "stones".

Oxalic acid is present in abundance in many plant products, with especially high content in sour grass, rubharb and buckwheat.  Other plants containing high levels of oxalates are (in decreasing order): starfruit (also known as carambola), black pepper, parsley, poppy seed, amaranth, spinach, chard, beets, cocoa, most nuts, most berries and beans.

Even tea leaves contain among the highest measured concentration of oxalic acid. However, tea beverages typically contain only very low to moderate amounts of oxalate due to the very small amount of leaves used for brewing.

Just remember, organic oxalic acid is essential for your body and is completely harmless if consumed in organic form.  It is the inorganic oxalic acid that causes trouble to your body.  This is the reason why when you drink fresh raw spinach juice, your body utilizes 100% of all the minerals that spinach has to offer.  But when cooked, the oxalic acid in spinach becomes inorganic and may posed some health problems in the long run.

Warning:  If you have kidney problems, keep your oxalic acid intake low, whether organic or inorganic.  See the list below as a guide.

boyagombak

Oxalic Acid Content in Selected Foods

Starfruit: Contains a high level                     of oxalic acid

People with recurrent kidney stones have a tendency to absorb higher levels of dietary oxalates compared to those not prone to kidney stones.  A low-oxalate diet is eating  foods containing less than 50 mgs of oxalic acid per day. Below is a list of selected foods with high oxalates content.  Please take this as a guide only as the content level may differ depending on the differences of climate where the plant was grown, the soil quality, state of ripeness when being tested, and also which part of the plant was analyzed.

People with recurrent kidney stones have a tendency to absorb higher levels of dietary oxalates compared to those not prone to kidney stones.  A low-oxalate diet is eating  foods containing less than 50 mgs of oxalic acid per day. Below is a list of selected foods with high oxalates content.  Please take this as a guide only as the content level may differ depending on the differences of climate where the plant was grown, the soil quality, state of ripeness when being tested, and also which part of the plant was analyzed.

Vegetables with High Oxalates Level ( >10 mg / serving)

Beets, greens or root * Celery Collards Dandelion greens Eggplant Escarole Green beans Kale Leeks Okra (lady's finger) ** Parsley

Parsnips Pepper, green Potatoes Pumpkin Spinach * Squash, yellow summer Sweet potatoes Swiss chard * Tomato sauce, canned Turnip greens Watercress

Fruits with High Oxalates Level ( >10 mg / serving)

Concord grapes Figs, dried ** Kiwi Lemon peel

Lime peel Orange peel Rubharb * Starfruit (carambola) **

Grains with High Oxalates Level ( >10 mg / serving)

Bread, whole wheat Buckwheat *** Oatmeal Popcorn Spelt

Stone-ground flour Wheat bran Wheat germ Whole wheat flour

Nuts and Seeds with High Oxalates Level ( >10 mg / serving)

Almonds ** Brazil nuts Hazel nuts Peanut butter ***

Peanuts *** Pecans Sesame seeds * Sunflower seeds

Other Foods with High Oxalates Level ( >10 mg / serving)

Beer Chocolate Cocoa Soy and all soy products

Tea, black Tea, green

stryder_cats

teh ais feveret aku

Tottot89

waa...teh ais sedap,tapi

boyagombak

bagaimana Batu karang Terjadi
Batu Karang (dalam saluran kencing)Posted by Online Dr. On February - 28 - 2011




Pengenalan
Sakit batu karang dalam saluran kencing ialah sakit samada di bahagian pinggang, perut, bahagian bawah perut dan mungkin terasa sakit juga di hujung zakar dan paha yang disebabkan oleh batu karang.

Dari mana datangnya batu karang
Batu karang terjadi dari mendapan garam galian di dalam air kencing.

Apa itu garam galian? Garam galian adalah minerals seperti natrium, kalium, kalsium, oxalate, urate, klorida dan lain-lain yang terdapat dalam makanan dan minuman harian. Sekiranya garam galian terlampau tinggi atau pekat dalam darah ia akan keluar ke dalam saluran kencing dan berkemungkinan mendapan akan berlaku maka terjadilah batu karang.
Biasanya batu ini terdiri dari

Calcium Phosphate Calcium Oxalate Urate Cystine
• Xantine

Jadi, hati-hati jika termakan lebih Calcium. Ia juga memudaratkan.

BAGAIMANA BATU KARANG TERJADI

kacangnips

Baru jer minum teh ais td..

boyagombak

Sambungan plak yer

Sebab-sebab batu karang.
Jadi, punca batu karang adalah berkaitan dengan:

• garam galian berlebihan dalam darah,

Ada sesetengah penyakit yang membuatkan penyerapan kalsium (calcium) dari usus terlalu tinggi dan ini menyebabkan batu karang senang berlaku. Oxalic acid sangat tinggi kandungannya dalam keledek, bayam, kubis Brussels, terung, daun bawang, brokoli, bit, lobak merah, paprika hijau, terung, selada Romaine dan saderi. Ia juga boleh buatkan batu karang jenis calcium oxalate kalau makan terlalu banyak. Uric acid sangat tinggi dalam darah bagi sesiapa yang mengalami penyakit Gout (gaut=sejenis sakit sendi). Mereka ini juga terdedah kepada batu karang jenis Urate.

• kurang air dalam badan buatkan garam galian jadi pekat dalam darah dan air kencing berkurangan boleh menyebabkan garam senang mendap.

• saluran kencing yang berlekuk atau berlopak dan tidak rata kerana jangkitan kuman sebelum ini, menjadikan tempat yang sangat sesuai untuk mendapan bermula.

Saluran kencing yang berlopak menjadikan tempat yang sangat sesuai untuk mendapan bermula dan membuatkan garam galian senang mendap. Ia bermula dengan ketulan yang kecil. Lama kelamaan ketulan garam galian tersebut menjadi besar dan tertanggal dari dinding lalu bergolek kebahagian bawah saluran kencing.

• kencing yang tidak lancar

Amalan selalu menahan kencing membuatkan kencing menjadi tidak lancar. Pundi kencing (bladder) adalah bergetah (elastic) dan boleh megecut (contract). Disebabkan pundi itu elastic ia boleh mengembang untuk menampung air kencing yang berlebihan  Sewaktu kencing, pundi akan megecut supaya air kencing dalam pundi terkeluar kesemuanya. Seperti getah, bila ia ditarik terlampau panjang atau kuat elastisitinya akan hilang. Daya mengecut juga akan hilang. Jadi sama juga akan terjadi pada pundi kencing sekiranya air kencing dibiarkan bertakung terlalu banyak dalam pundi sehingga pundi mengembang terlalu besar, hingga seseorang rasa tak selesa, elastisiti dan daya mengecut akan hilang dan ini akan membuatkan kencing tidak lawas walaupun air kencing sudah banyak dalam pundi kencing. Bila kencing hanya sedikit sahaja keluar disebabkan pundi tidak dapat mengecut dengan normal. Maka air kencing akan tertinggal dalam pundi. Ini akan membuatkan garam galian senang mendap dan batu karang senang berlaku.

• keturunan (genetic)

Apakah tanda-tanda batu karang dalam saluran kencing
Ramai doktor tersalah diagnose bila seseorang datang ke klinik mengadu sakit perut atau sakit belakang. Ia diingatkan cuma sakit gastrik atau angin atau sakit urat belakang.
Yang pastinya jika seseorang mengadu sakit yang:

• Sakit seperti senak di bahagian tepi belakang atau tepi perut atau tepi perut bahagian bawah atau atas pundi kencing, di kemaluan. Kadang-kadang terasa sakit di bahagian sebelah dalam paha atau
• Kencing berdarah.
• Bila kencing, terkeluar batu karang mungkin sebesar hujung pen (seperti pasir yang halus)
• Sakitnya buatkan seseorang terjaga dari tidur yang nyenyak dan tidak lagi dapat tidur walaupun disapu ubat angin atau selepas buang air besar.
• Sakitnya membuatkan seseorang tidak dapat berdiam diri sebaliknya akan meronta-rota dan berjalan ke hulu ke hilir kerana sakit yang berdenyut-denyut.
• Terasa ingin buang air besar tetapi tiada najis yang keluar.
• Terasa angin dalam perut yang tak hilang walaupun telah ambil ubat angin.
• Kadang-kadang loya atau muntah.

Bila seseorang mengalami simptom ini beritahulah kepada doktor mungkin anda terkena penyakit batu karang di saluran kencing. Mintalah dengan doktor agar sekurang-kurangnya pemeriksaan air kencing dibuat. Sekiranya kencing anda didapati mengandungi darah maka besar kemungkinan anda berpenyakit batu karang.
Pencegahan

• Minumlah air sebanyak mungkin
• Elakkan menahan kencing.
• Jangan terlalu ghairah mengambil terlalu banyak kalsium.
• Makanan yang mengandungi oxalate (seperti tercatit di atas) mesti dikurangkan pengambilannya.
• Pastikan paras uric acid bagi pesakit gout di paras normal dengan mengambil ubat seperti Allopurinol.

Rawatan
Biasanya jika ke klinik swasta, selepas doktor mengesahkan anda menghadapi sakit batu karang,

• Suntikkan untuk menahan atau menghilangkan sakit.
• Ubat menghilangkan sakit
• Ubat untuk hancurkan batu karang
• Disyorkan pemeriksaan X-ray
• Jika tidak hilang sakitnya, doktor akan rujuk di hospital
• Di hospital beberapa kaedah ada digunakan mengikut saiz batu karang ini seperti shock-wave lithotripsy-yang menggunakan gelombang suara untuk pecahkan batu atau pembedahan.

boyagombak

Boleh minum tapi agak-agaklah, sendiri mau ingat
Tukar minuman air suam ais, pasti jimat dan selamat

cikjeela

lagi senang, jangan minum ais.. amalkan ayor suam sudahhhh..

hAzEL^nut

hehe dulu-dulu suka yamahattt teh ais, teh tarik, dan teh2 yang sewaktu dengannya.
sekarang nih, dah kurangkan minum camtu dah.
sekali sekala bole la nak lepas gian.

thanks for sharing TT.

RosesAre_Red

thanks for sharing

cik.panda

sedapnyaa teh ais

damia189

thanks ,good info...

damia189

thanks ,good info...