Skin Care and Treatments of Melbourne Dermatology - Cell Division

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Cell Division


Cell division is the biological event by which a skin cell divides into two daughter skin cells with the same genetic material (ie., the same DNA).

Wednesday, 10 August 2005

Chromatin

A chromatin is the material of which the chromosomes of organisms other than bacteria (i.e., eukaryotes) are composed. It consists of protein, RNA, and DNA.

Wednesday, 10 August 2005

Guanine

Guanine a compound that occurs in guano and fish scales, and is one of the four constituent bases of nucleic acids.

A purine derivative, it is paired with cytosine in double-stranded DNA.

Alternative name: 6-oxy-2-aminopurine.

Chemical formula: C 5 H 5 N 5 O.

Wednesday, 10 August 2005

Adenine

Adenine is a compound that is one of the four constituent bases of nucleic acids.

Adenine is a purine derivative, it is paired with thymine in double-stranded DNA.

Alternative name: 6-aminopurine.

Chemical formula: C 5 H 5 N 5.

Wednesday, 10 August 2005

Cytosine

Cytosine is a compound found in living tissue as a constituent base of nucleic acids. It is paired with guanine in double-stranded DNA.

Cytosine is a pyrimidine derivative.

Its chemical formula: C 4 H 5 N 3 O.

Saturday, 1 April 2006

Thymine

Thymine is a compound that is one of the four constituent bases of nucleic acids.

Thymine is a pyrimidine derivative, it is paired with adenine in double-stranded DNA.

Alternative name: 5-methyluracil.

Chemical formula: C 5 H 6 N 2 O 2

Sunday, 14 June 2009

Heteroaromatic

Heteroaromatic denotes an organic compound with a ring structure that is both heterocyclic and aromatic.

Wednesday, 10 August 2005

Pyrimidine

Pyrimidine is a colorless crystalline compound with basic properties (see bullet point below).

It is a heteroaromatic compound with a chemical formula:

C 4 H 4 N 2.

  • Pyrimidine base is a substituted derivative of this, esp. the bases thymine and cytosine present in DNA.

Wednesday, 10 August 2005

Purine

A purine compound is colorless and crystalline with basic properties, and forms uric acid on oxidation.

It is a bicyclic compound with a chemical formula of C 5 H 4 N 4.

A purine base is a substituted derivative of this, especially the bases adenine and guanine present in DNA and RNA.

Wednesday, 10 August 2005

Cytidine

Cytidine is a nucleoside composed of cytosine linked to ribose, obtained from RNA by hydrolysis.

Wednesday, 10 August 2005

Adenosine

Adenosine is a compound consisting of adenine combined with ribose, one of four nucleoside units in RNA.

Wednesday, 10 August 2005

Nucleoside

A neucleoside is a compound (e.g., adenosine or cytidine) commonly found in DNA or RNA, consisting of a purine or pyrimidine base linked to a sugar.

Wednesday, 10 August 2005

Histone

A histone is any of a group of basic proteins found in chromatin.

Wednesday, 10 August 2005

Chromatid

A chromatid is one of the two threadlike strands into which a chromosome divides longitudinally during cell division.

Each contains a double helix of DNA.

ORIGIN

Early 20th century.

From the Greek khroma, khromat meaning ‘color’ + -id.

Wednesday, 7 November 2007

Nucleotides

A nucleotide is a compound consisting of a nucleoside linked to a phosphate group.

Nucleotides form the basic structural unit of nucleic acids such as DNA.

Refer Gernetic Nuclea.

Wednesday, 10 August 2005

RNA

RNA, short for ribonucleic acid, a nucleic acid present in all living cells.

Its principal role is to act as a messenger carrying instructions from DNA for controlling the synthesis of proteins, although in some viruses RNA rather than DNA carries the genetic information.

Wednesday, 10 August 2005

Nucleic Acid

Nucleic acids are complex organic substances present in living cells, esp. DNA or RNA, whose molecules consist of many nucleotides linked in a long chain.

Thursday, 21 May 2009

Chromosome

A chromosome is a threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.

  • Each chromosome consists of a DNA double helix bearing a linear sequence of genes, coiled and recoiled around aggregated proteins (histones).
  • Their number varies from species to species: humans have 22 pairs plus the two sex chromosomes (two X chromosomes in females, one X and one Y in males).
  • During skin cell division, each DNA strand is duplicated, and the chromosomes condense to become visible as distinct pairs of chromatids joined at the centromere.

Bacteria and viruses lack a nucleus and have a single chromosome without histones.

Thursday, 18 December 2008

DNA

DNA, short for deoxyribonucleic acid, is a self-replicating material present in nearly all living organisms as the main constituent of chromosomes.

DNA is the carrier of genetic information.

Each molecule of DNA consists of two strands coiled around each other to form a double helix, a structure like a spiral ladder. Each rung of the ladder consists of a pair of chemical groups called bases (of which there are four types), which combine in specific pairs so that the sequence on one strand of the double helix is complementary to that on the other.

It is the specific sequence of bases that constitutes the genetic information.

ORIGIN

1930s.

Deoxyribonucleic from a blend of deoxyribose and nucleic acid.

Wednesday, 10 August 2005

Centromere

The centromere is the point on a chromosome by which it is attached to a spindle fiber during cell division.

ORIGIN

1920s, from the Latin centrum (meaning center ) + Greek meros meaning ‘part.’

Thursday, 8 October 2009

Helix

In biochemistry, a helix is an extended spiral chain of atoms in a protein, nucleic acid, or other polymeric molecule.

Helix

ORIGIN

Middleid 16th century.

In the architectural sense [spiral ornament], via Latin, "Helix" from Greek.

Wednesday, 10 August 2005

Spindle Fiber

Skin Care and Dermatological Glossary :

Phospholipids : Alcohols : Dietary Antioxidants : Glycolic Acid : Rosacea : ATP : About Trehalose : Accutane (Isotretinoin) : Acidic : Actinic : Alkaline : Alopecia : Amino Acids : Amphoteric : Angiogenesis : Angioma : Antioxidants : Aqueous : Arc : Arteriole : Artery : Ascorbic Acid / Vitamin C : Atherogenic : Atopic : Benzene : Bioavailability : Bioflavonoid : Biopsy : Biotechnology : Blackhead : Cadaver : Calcium : Capillary : Carboxyl : Carcinogenicity : Carcinoma : Cartilage : Catechins : Cell Division : Cellulitis : Chromatography : Cicatrix : Citric Acid : Citronellol : Coccidioidomycosis : Colitis : Collagen : Colourimetre : Comedo/Comedone : Compound : Connective Tissue : Contusion : Corpus Luteum : Cosmesis : Cyst : Cytochrome : Cytotoxin : Denature : Dermatitis : Dermis : Diabetes : Dibasic Acid : Diploidy/Diploid : Diuretic : Eczema : Edema/Oedema : Elastase: The Unrestrained Thief of Skin Elasticity : Elastin : Electrolysis : Electrophoresis : Emollient : Enantiomer : Endothelium : Environmental Stressors : Enzymes : Eosin : Epidermal Necrosis : Epidermis : Epithelium : Erythema : Essential Fatty Acids : Essential Oils : Esters : Eugenol : Eukaryote/Eukaryotic : Exanthem/Exanthema : Extirpation : Fatty Acids : Ferulic Acid : Fibroblast : Flavonolignan : Flora : Folic Acid (Pteroylglutamic Acid/Vitamin M) : Follicle : Free Radical : Fullerene : Galapagos Tortoise : Gamete : Gene : Genistein : Genome : Genomic DNA : Genotoxin : Glasswort : Glucagon : Glutamic Acid : Glycation : Glycerin : Glycopeptide : Glycoprotein : Glycosaminoglycans : Haploidy/Haploid : Hematoxylin : High Frequency Glass Electrode Beauty Devices : Histology/Histologic : Hives : Hormone : Humectant : Hyaluronic Acid/Sodium Hyaluronate : Hydrocarbon : Hydrolysis : Hydrophilic : Hydrophobic : Hydroxyl (OH) : Hygroscopic : Hypertrophic Scar : Hypochlorous Acid : Hypopigmentation : Immunosuppression : In Summary: Oxidation/Reduction and Tanning : In Vitro : In Vivo : Insulin : Interleukins : Ischemia : Islet : Islets of Langerhans/Islands of Langerhans : Isoprene : Keloid : Keratin : Keratinocytes : Kinase : Lactic Acid : Lactoferrin : Lignin : Limonene : Lipids : Lipophilic : Lymphatic System : MMPs (Matrix Metalloproteinases) : Macromolecule : Malic Acid : Mandelic Acid : Melanin : Melanoma : Membrane : Membrane : Mermaid : Metabolism : Metalloproteinases : Metastatic : Methionine : Micellization : Microtubule : Mineral : Molecular/Cellular Biology: Skin Functioning at the most Essential Level : Molecule : Moles (Blemishes)/Moles Per Litre : Monomer : Mucin : Mucoproteins : Myelin : Nanotechnology : Neurotoxin : Nitrogen : Nodule : Nymph : ORAC : Occlusive : Optic : Otorhinolaryngology : Oxygen : Oxytalan Fibers/Fibres : Ozone : Palmitic Acid : Papain : Papillary Dermis : Papule : Pentacyclic : Pentapeptides GM and GD : Pentose : Peptidases : Peptides : Perichondrium : Peroxidase : Peroxide : Phenol : Phlebitis : Photosensitivity : Phytostimulines : Pigmentation : Pimple : Pledget : Polymer : Polymer/Polymeric : Polypeptide : Polyquaterium-51 : Post-Inflammatory Hyperpigmentation : Pro-Collagen : Prodrug : Proenzymes : Prophylaxis : Propionibacterium / P. Acnes Bacteria : Proteases : Protein : Proteoglycans : Proteolytic Enzymes : Proteome : Pruritus : Psoriasis : Pure/Purity : Pustule : Radiation : Radical : Redox : Reductase : Reperfusion : Restenosis : Reticular Dermis : Retinol : Rhinoplasty : Rockfish : Saccharides : Sebum : Selenium (Definition) : Selenosis : Senescence : Sentinel : Skin Resurfacing by Laser : Skin Structure Diagram : Sodium PCA : Squamous : Stable/Stability : Stenosis : Stratum Corneum : Subclinical Inflammation : Subcutis : Sulfur : Surfactant : Synovial : Tannins : Tartaric Acid : Telomere : Temporal Bones : Thermoregulation / Thermoregulate : Thymine Dimer : Tocopherol : Transferase : Tribasic Acid : Triterpenoid : Tropoelastin : Tubulin : Ubiquinone — Co-Enzyme Q-10 : Vascular : Vascular Epithelial Growth Factor : Vein : Venule : Vestibule : Viscous : Vitamin K : Vitamin PP/Nicotinate : Vitamins : Whitehead : Xerosis : Zygoma : Zygote : pH :

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Skin Care and Dermatological Glossary :

Phospholipids : Alcohols : Dietary Antioxidants : Glycolic Acid : Rosacea : ATP : About Trehalose : Accutane (Isotretinoin) : Acidic : Actinic : Alkaline : Alopecia : Amino Acids : Amphoteric : Angiogenesis : Angioma : Antioxidants : Aqueous : Arc : Arteriole : Artery : Ascorbic Acid / Vitamin C : Atherogenic : Atopic : Benzene : Bioavailability : Bioflavonoid : Biopsy : Biotechnology : Blackhead : Cadaver : Calcium : Capillary : Carboxyl : Carcinogenicity : Carcinoma : Cartilage : Catechins : Cell Division : Cellulitis : Chromatography : Cicatrix : Citric Acid : Citronellol : Coccidioidomycosis : Colitis : Collagen : Colourimetre : Comedo/Comedone : Compound : Connective Tissue : Contusion : Corpus Luteum : Cosmesis : Cyst : Cytochrome : Cytotoxin : Denature : Dermatitis : Dermis : Diabetes : Dibasic Acid : Diploidy/Diploid : Diuretic : Eczema : Edema/Oedema : Elastase: The Unrestrained Thief of Skin Elasticity : Elastin : Electrolysis : Electrophoresis : Emollient : Enantiomer : Endothelium : Environmental Stressors : Enzymes : Eosin : Epidermal Necrosis : Epidermis : Epithelium : Erythema : Essential Fatty Acids : Essential Oils : Esters : Eugenol : Eukaryote/Eukaryotic : Exanthem/Exanthema : Extirpation : Fatty Acids : Ferulic Acid : Fibroblast : Flavonolignan : Flora : Folic Acid (Pteroylglutamic Acid/Vitamin M) : Follicle : Free Radical : Fullerene : Galapagos Tortoise : Gamete : Gene : Genistein : Genome : Genomic DNA : Genotoxin : Glasswort : Glucagon : Glutamic Acid : Glycation : Glycerin : Glycopeptide : Glycoprotein : Glycosaminoglycans : Haploidy/Haploid : Hematoxylin : High Frequency Glass Electrode Beauty Devices : Histology/Histologic : Hives : Hormone : Humectant : Hyaluronic Acid/Sodium Hyaluronate : Hydrocarbon : Hydrolysis : Hydrophilic : Hydrophobic : Hydroxyl (OH) : Hygroscopic : Hypertrophic Scar : Hypochlorous Acid : Hypopigmentation : Immunosuppression : In Summary: Oxidation/Reduction and Tanning : In Vitro : In Vivo : Insulin : Interleukins : Ischemia : Islet : Islets of Langerhans/Islands of Langerhans : Isoprene : Keloid : Keratin : Keratinocytes : Kinase : Lactic Acid : Lactoferrin : Lignin : Limonene : Lipids : Lipophilic : Lymphatic System : MMPs (Matrix Metalloproteinases) : Macromolecule : Malic Acid : Mandelic Acid : Melanin : Melanoma : Membrane : Membrane : Mermaid : Metabolism : Metalloproteinases : Metastatic : Methionine : Micellization : Microtubule : Mineral : Molecular/Cellular Biology: Skin Functioning at the most Essential Level : Molecule : Moles (Blemishes)/Moles Per Litre : Monomer : Mucin : Mucoproteins : Myelin : Nanotechnology : Neurotoxin : Nitrogen : Nodule : Nymph : ORAC : Occlusive : Optic : Otorhinolaryngology : Oxygen : Oxytalan Fibers/Fibres : Ozone : Palmitic Acid : Papain : Papillary Dermis : Papule : Pentacyclic : Pentapeptides GM and GD : Pentose : Peptidases : Peptides : Perichondrium : Peroxidase : Peroxide : Phenol : Phlebitis : Photosensitivity : Phytostimulines : Pigmentation : Pimple : Pledget : Polymer : Polymer/Polymeric : Polypeptide : Polyquaterium-51 : Post-Inflammatory Hyperpigmentation : Pro-Collagen : Prodrug : Proenzymes : Prophylaxis : Propionibacterium / P. Acnes Bacteria : Proteases : Protein : Proteoglycans : Proteolytic Enzymes : Proteome : Pruritus : Psoriasis : Pure/Purity : Pustule : Radiation : Radical : Redox : Reductase : Reperfusion : Restenosis : Reticular Dermis : Retinol : Rhinoplasty : Rockfish : Saccharides : Sebum : Selenium (Definition) : Selenosis : Senescence : Sentinel : Skin Resurfacing by Laser : Skin Structure Diagram : Sodium PCA : Squamous : Stable/Stability : Stenosis : Stratum Corneum : Subclinical Inflammation : Subcutis : Sulfur : Surfactant : Synovial : Tannins : Tartaric Acid : Telomere : Temporal Bones : Thermoregulation / Thermoregulate : Thymine Dimer : Tocopherol : Transferase : Tribasic Acid : Triterpenoid : Tropoelastin : Tubulin : Ubiquinone — Co-Enzyme Q-10 : Vascular : Vascular Epithelial Growth Factor : Vein : Venule : Vestibule : Viscous : Vitamin K : Vitamin PP/Nicotinate : Vitamins : Whitehead : Xerosis : Zygoma : Zygote : pH :


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