ChemCafe — science, chemistry and physics made simple – Page 121 of 276 – Chem Cafe is a place to share and discuss new scientific research. Read about the latest advances in chemistry, physics, astronomy, biology, medicine, social science, and more. Find and submit new publications and popular science coverage of current research.

Posted inin Molecular

Bacterial Culture Usage Duration After Storage at 4°C and Key Considerations

Posted byby Franklin Veaux
1 month ago
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2 min

How Long Can Bacterial Cultures Be Used After Storage at 4°C? Bacterial cultures stored at 4°C should ideally be used within one day to maintain viability and plasmid quality. Extended...

Posted inin Chemistry

MO Theory and Lone Electron Pairs: Understanding Their Role in Electron Density and O2 Structure

Posted byby Franklin Veaux
1 month ago
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5 min

MO Theory and Lone Electron Pairs Lone electron pairs are found in nonbonding molecular orbitals, not in bonding or antibonding orbitals. This distinction defines their unique role in molecular structure....

Posted inin Chemistry

Help Understanding Dot Diagram for Li-Br: Ionic Nature, Lewis Representation, and Common Misinterpretations

Posted byby Franklin Veaux
1 month ago
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2 min

Help Understanding Dot Diagram for Li-Br LiBr is an ionic compound, so its Lewis dot diagram must reflect the transfer of electrons rather than sharing them. Lithium (Li) donates one...

Posted inin Molecular

Positive PCR Control Fails to Amplify: Analyzing Causes and Solutions

Posted byby Franklin Veaux
1 month ago
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2 min

Positive PCR Control No Longer Showing Any Bands The main cause for a positive PCR control losing bands often lies in issues with template DNA integrity, PCR setup, primer or...

Posted inin Molecular

Learn Molecular Cloning: Essential Guidance for Comprehensive Understanding

Posted byby Franklin Veaux
1 month ago
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5 min

How to Learn Everything About Molecular Cloning Learning everything needed about molecular cloning requires using comprehensive educational resources, gaining hands-on experience, embracing continuous self-education, and developing practical laboratory skills. These...

Posted inin Chemistry

Caffeine Explained: Benefits, Risks, and Safe Consumption Practices

Posted byby Franklin Veaux
1 month ago
0 Comments
7 min

Understanding Caffeine: A Comprehensive Explanation Caffeine is a natural stimulant drug that acts on the central nervous system by increasing neurotransmitter activity, leading to heightened alertness and focus. It originates...

Posted inin Chemistry

Why Ozone (O₃) Forms a Bent Structure Instead of an Equilateral Triangle

Posted byby Franklin Veaux
1 month ago
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3 min

Why Does Ozone (O3) Not Form an Equilateral Triangle? The reason ozone does not adopt an equilateral triangular shape lies in bond strain, lone pair repulsion, and molecular orbital interactions,...

Posted inin Chemistry

Is H2 an Element or a Molecule? Understanding Your Teacher’s Statement on Chemistry

Posted byby Franklin Veaux
1 month ago
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8 min

Is H2 an Element or a Molecule? H2 is both a molecule and the elemental form of hydrogen. It is a molecule because it consists of two hydrogen atoms bonded...

Posted inin Chemistry

What is the Unit of v0 in the Michaelis-Menten Equation and Its Relation to Vmax

Posted byby Franklin Veaux
1 month ago
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1 min

Unit of v0 in the Michaelis-Menten Equation The unit of v0 in the equation v0 = Vmax × [S] / ([S] + Km) is the same as the unit of...

Posted inin Chemistry

Understanding the Meaning of 1F: From Chemistry to Social Media Insights

Posted byby Franklin Veaux
1 month ago
0 Comments
7 min

What Does 1F Mean? 1F means one formula weight per liter, a unit synonymous with formal concentration, also called formality. In chemistry, 1F denotes 1 formula weight of a substance...