Dwipayana

Plant Distribution

2008-03-23T11:17:00.003+07:00

Plant commonly was the producer in every ecosystem which eaten by other organism. Beside that, it’s also produce oxygen. We need this substance for breathing. According to that statement we can see how important was the plant. Without plant, we and other organism couldn’t live. But like the human body requires optimum nutritional from animals and plants, environmental and various other optimum conditions for general well-being and growth, plants also need certain optimum conditions that promote their growth. There are two major factors that the plant need to growth. These are nutritional plant growth factors and environmental plant growth factors.
Nutritional plant growth factors. There are several aspects of plant nutrition, which need to be considered for better growth of plants. The basic nutrients required for plant growth are divided into two main categories namely micronutrients and macronutrients. Macronutrients are the nutrient that the plant need in larger quantities. These are nitrogen, potassium, magnesium, calcium, phosphorus, and sulfur. On the other way, Micronutrients are the nutrient that the plant required in smaller quantities, such as : iron, zinc, molybdenum, manganese, boron, copper, cobalt, and chlorine. Beside macronutrients and micronutrients, plant also need water to growth. Water is one of the most essential factors required in growth of plants. Water plays a crucial role for efficient photosynthesis, respiration, transpiration and transportation of minerals and other nutrients through the plant. Water is responsible for functioning of the stomatal opening of leaves and also the source of pressure for the directed growth of roots through the soil.
Environmental plant growth factors. In addition to the nutritional factors there are various environmental factors, which play an instrumental role in enhancing the plant growth. These factors are light, temperature, relative humidity, Oxygen, carbon dioxide, and soil. Plants need that to promote the photosynthesis or respiration process direct and undirectly.
As we know, the environmental factors vary based on the land’s geographic. And If any environmental factor is less than ideal, it limits a plant's growth and/or distribution. For example, only plants adapted to limited amounts of water can live in deserts. These conditions make plants growth commercially in a subtropic area, and rare in an extreme conditions area (very high temperature, very low temperature, etc).

Heart Disease

2008-03-23T11:13:00.001+07:00

Heart disease also called Cardiovascular disease was the number one killer in US. About 2600 people in US die every day of this disease. According to the World Health Organization, cardiovascular disease causes 12 million deaths in the world each year. It was a serious problem that we as a researcher have to solve together to reduce the death cases which cause of this disease.
After many studies involving thousands of patients, researchers have found certain factors that play an important role in a person's chances of developing heart disease, these are called risk factor. Risk factors are divided into two categories: major factor and contributing factor. Major risk factors are those that have been proven to increase your risk of heart disease. Contributing risk factors are those that doctors think can lead to an increased risk of heart disease, but their exact role has not been defined.
The Major risk factors are : High Blood Pressure (Hypertension), High blood Cholesterol, Diabetes, Obesity and Overweight, Smoking, Physical Inactivity, Gender, Heredity, and Age. High blood pressure can increase your risk of heart disease, heart attack, and stroke. It’s also make your emotional unstabil. Too many Cholesterol in your blood could make a plaque on artery walls. If it was built in the coronary arteries that supply blood to your heart, you are at greater risk of having heart disease. The American Heart Association estimates that 65% of patients with diabetes die of some form of cardiovascular disease. Extra weight is thought to lead to increased total cholesterol levels, high blood pressure, and an increased risk of coronary artery disease. Research has shown that smoking increases heart rate, tightens major arteries, and can create irregularities in the timing of heartbeats, all of which make your heart work harder. People who are not active have a greater risk of heart attack than do people who exercise regularly. Exercise burns calories, helps to control cholesterol levels and diabetes, and may lower blood pressure. According to some research, men have a higher risk of heart attack than women. Heart disease also tends to run in families, if your parents have a heart disease, you will probably have this disease too. Older age is a risk factor for heart disease. As we age, our hearts tend to not work as well.
The Contributing risk factors are : Stress and Alcohol. Researchers have identified several reasons why stress may affect the heart. Stressful situations raise your heart rate and blood pressure, increasing your heart's need for oxygen. Studies have shown that the risk of heart disease in people who drink moderate amounts of alcohol is lower than in nondrinkers.

Bagaimana manusia terbentuk dari atom?

2006-04-13T02:32:00.003+07:00

Telah dijelaskan bahwa atom berkumpul membentuk manusia, tetapi, tentu saja, kamu tentu bertanya-tanya bagaimana ini dapat terjadi. Pertama, atom-atom bergabung membentuk SEL-SEL. Kembali, kita mempelajari sesuatu yang baru: Apa itu sel?

Tubuh dari semua organisme hidup terbuat dari sel. Bahkan walau tidak sekecil atom, mereka tetap terlalu kecil dan tidak bisa dilihat dengan mata telanjang. Kita dapat menjelaskan ukuran kecil mereka dengan contoh berikut ini: Jika kita mengumpulkan 10.000 sel kita baru dapat menghasilkan seukuran kepala jarum. Karena itulah kita tidak dapat melihat mereka. Tetapi sel-sel merupakan bahan pembangun manusia, semut, kucing, bunga, pohon dan semua organisme hidup lainnya di sekitarmu. Kamu, misalnya, terbuat dari triliunan sel. Jadi, dari mana semua triliunan sel ini datang?

Lihatlah adikmu atau saudara sepupumu yang masih kecil. Dia belum ada beberapa tahun yang lalu, lalu secara tiba-tiba dia muncul dan mulai tumbuh. Awalnya adikmu adalah sebuah sel tunggal di dalam perut ibumu…. Tetapi sel tunggal ini menyimpan banyak informasi penting. Semua informasi yang telah membuat adikmu menjadi seperti sekarang tersimpan di dalam sel ini: warna matanya, warna rambutnya, tingginya….

Lalu sel ini tumbuh sedikit dan mulai membelah diri. Pertama, ia membelah menjadi dua. Namun, di sini terjadi sesuatu yang sangat menarik, informasi di dalam sel tidak membelah ikut dua. Artinya, informasi yang sama digandakan dalam dua sel itu. Setelah itu, kedua sel terus membelah diri dan penggandaan informasi yang sama terjadi lagi, menghasilkan banyak sel dengan informasi yang sama. Kemudian terjadi lagi pembelahan, dan pembelahan lagi… peristiwa ini terus terjadi dan jutaan sel terbentuk

Sel-sel ini, walaupun mengandung informasi yang sama, mulai melakukan tugas-tugas yang berbeda satu sama lain. Sebagian menjadi sel-sel kulit; lainnya menjadi sel-sel otot, sel-sel kerangka, sel-sel saraf dan seterusnya. Sementara sel-sel terus menggandakan diri, tumpukan sel yang nyaris menyerupai sebuah bola mulai berbentuk. Seperti kamu lihat pada gambar di atas halaman, pertama kepala adikmu muncul, diikuti oleh kedua tangannya yang kecil dan kemudian kedua kakinya. Sel-sel terus tumbuh dan membelah diri dan setelah 9 bulan menjadi bayi seutuhnya. Kamu melihatnya pada saat ini.

Semua yang telah diungkapkan sampai saat ini tentunya mengejutkanmu. Kamu mungkin telah memikirkan mengapa sel-sel mengambil tugas-tugas yang berbeda atau bagaimana mereka mengambil bentuk yang begitu rapi. Tuhan lah Yang melakukan semua ini. Sel-sel merupakan bentuk yang kecil dan tak terlihat oleh mata telanjang. Seperti atom, tidak mungkin sel mengambil keputusan atau berkumpul membentuk manusia dengan sendirinya. Tidak masuk akal jika berpikir bahwa adikmu atau manusia lainnya dibuat oleh sel-sel yang berkumpul secara kebetulan.

Introduction

2006-04-07T12:29:00.003+07:00

Hi.....
Let me introduce myself, I was born in the paradise island "Bali" on July 26th 1987. Now I'm 21 years old. Have you ever gone to Bali? if you don't, I recommend you too see by your own eyes how beautiful is it and how amazing the balinese culture.
Now I'm studying in Physics Department of ITB.