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ঘটনাটি ১৯৮৬ সালের। রাশিয়াতে চেরনোবিল পারমানবিক শক্তি কেন্দ্রে ঘটে এক ভয়াবহ বিস্ফোরণ। এতে তাৎক্ষণিকভাবে মৃত্যু ঘটে বহু মানুষের। পাশাপাশি  ধ্বংস হয়ে যায় সেখানকার গাছপালা , পশু-পাখি এবং অন্যান্য জীব। শুধু তাই নয়, আজ পর্যন্ত এর তেজস্ক্রিয়তার প্রভাবে এলাকাটি কোনো জীব বসবাসের অযোগ্য। যাদের তৎক্ষনাত মৃত্যু ঘটে নি, তারাও সেখানকার চরম …

Buffers are aqueous systems that tend to resist changes in pH when small amounts of acid (H+) or (OH–) are added. A buffer system composes of weak acid (the proton donor) and its conjugate base (the proton acceptor). A mixture of equal concentrations of acetic acid and acetate ion is …

(Author of this article: Shajneen Shoily) In soil, there may be found 3 type of reactions. They are neutral, alkaline or acidic reaction. The measure of the chemical reaction of soil(degree of alkalinity or acidity) is expressed by its pH value. Soil pH Soil pH is the negative logarithm of …

(Author of this article: Shajneen Shoily) The importance of soil pH can be classified into its direct and indirect effects on edaphology and pedology: Direct Effects 1. Toxic and destructive effect of OH– and H+ ions on root growth It is found that a destructive action on root tissues by …

Research suggests that three major pools of acidity are common in soils: (1) active acidity due to the H+ ions in the soil solution; (2) salt-replaceable (exchangeable) acidity , involving the aluminum and hydrogen that are easily exchangeable by other cations in a simple unbuffered salt solution, such as KCI; …

For studying, researching and observing plants and plantlife, we need to start from the beginning of some basic divisions of plants and have the knowledge of some plant categories. Bryophytes are one of most interesting and incredible divisions of the plant kingdom. Anyone who have thirst to know about the …

Plants can see us. They can monitor their visible environment. They can see if you’re wearing a red or blue shirt. They know if you’re moving them from one place of your house to another. When you take a picture turning the flash on for a better and clearer image, …

When we observe a living cell, we can see a variety of living bodies of definite structures and functions suspended in the cytoplasm, known as organoides or organelles. These organelles are the main sites for the various cytoplasmic activities. Some of these are concerned with the chemical activities or metabolism …

In the year 1986, a horrifying incident took place. It killed many instantly (who were very close to the nuclear reactor). As well as kept on affecting several many living beings including plants, wild and domestic animals. The extreme radioactive environment affected the people whoever was still living in that …

We all agree that classification and taxonomy of organisms are desirable and necessary in cases of biological work. But, there is much disagreement as to the best method of classifying and naming living things. The zoologists and the botanists have arranged matters in their fields fairly satisfactorily, largely on the …