Image Tiramisu.jpg thumb right 250px Mascarpone cream Mascarpone IPA en m sk r po ni lang or IPA en m sk rpo n , IPA it maskar po ne lang ref name urlVoluptuous mascarpone enhances sweet or savory cite web url http www2.timesdispatch.com lifestyles 2008 feb 24 rtd 2008 02 24 0026 ar 137257 title Voluptuous mascarpone enhances sweet or savory format work accessdate 2010 03 01 ref is an Italian cheese made from cream, coagulated with citric acid or acetic acid . ref cite web title Mascarpone Artigianale url http www.buonalombardia.it browse.asp?goto 11980 accessdate 22 September 2011 language Italian ref ref cite web title Mascarpone url http www.turismo.provincia.lodi.it TPL gastronomia NOTIZIA 1.asp?IDNotizia 33&IDCategoria 633 accessdate 22 September 2011 author Turismo Provincia di Lodi language Italian year 2004 ref After Denaturation biochemistry denaturation , whey is removed without pressing or aging. One can manufacture mascarpone by using cream and tartaric acid , citric acid , or even lemon juice. ref http biology.clc.uc.edu fankhauser Cheese mascarpone.HTM Instructions for making your own fresh mascarpone from University of Cincinnati Clermont College ref br Mascarpone is recognized as a Prodotto agroalimentare tradizionale traditional regional food product . ref cite web title Elenco dei prodotti agroalimentari tradizionali della Regione Lombardia Quinta revisione url http docs.google.com viewer?a v&q cache srBdc r5NkYJ www.provincia.pv.it provinciapv portalpublicdownload downloadFile 3FportalId 3D1 26fileName 3D01379 01 it.pdf 26isVersion 3Df 26publicArea 3Dt site www.provincia.pv.it prodotti agroalimentari tradizionali lombardia&hl it&gl it&pid bl&srcid ADGEEShMqYq m4PWB SReP6we516nVBH7 bc5RQRv9iS4EFcT8mC9TLFD09pHOwsJ gE1ZUvxwtcSlhyldXYUgbFd5dOqTMenTZQ1n7ikAUqUIvO 17sZ05PnaF4gmb0RQkugJZbE7Jp&sig AHIEtbRXiIQ40LnEp2rWa5gqRqtxEPC5Vg accessdate 22 September 2011 author Regione Lombardia page 6 language Italian ref Mascarpone is milky white in color and ... more details
A chaotropic agent is a substance which disrupts the structure of, and denaturation biochemistry denatures , macromolecule s such as protein s and nucleic acid s e.g. DNA and RNA . Chaotropic solutes increase the entropy of the system by interfering with intramolecular interactions mediated by non covalent forces such as hydrogen bond s, van der Waals forces , and hydrophobic effect s. Macromolecular structure and function is dependent on the net effect of these forces see protein folding , therefore it follows that an increase in chaotropic solutes in a biological system will denature macromolecules, reduce enzymatic activity and induce stress on a cell i.e., a cell will have to synthesize stress protectants . Tertiary protein folding is dependent on hydrophobic force s from amino acid s throughout the sequence of the protein. Chaotropic solutes decrease the net hydrophobic effect of hydrophobic regions because of a disordering of water molecules adjacent to the protein. This solubilises the hydrophobic region in the solution, thereby denaturing the protein. This is also directly applicable to the hydrophobic region in lipid bilayer s if a critical concentration of a chaotropic solute is reached in the hydrophobic region of the bilayer then membrane integrity will be compromised, and the cell will lyse . ref cite journal last Bhaganna first P coauthors Volkers RJM, Bell ANW, Kluge K, Timson DJ, McGrath JW, Ruijssenaars HJ, Hallsworth JE title Hydrophobic substances induce water stress in microbial cells journal Microbial Biotechnology year 2010 volume 3 issue 6 pages 701 716 doi 10.1111 j.1751 7915.2010.00203.x ref Chaotropic compounds, and chaotropic salts that dissociate in solution exert chaotropic effects via different mechanisms. Whereas compounds, such as ethanol, interfere with non covalent intramolecular forces as outlined above salts can have chaotropic properties ... Urea See also Kosmotropic Hofmeister series Denaturation biochemistry References Reflist DEFAULTSORT ... more details
Slipped strand mispairing SSM is a mutation process which occurs during DNA replication . It involves Denaturation biochemistry denaturation and displacement of the DNA strands, resulting in mispairing of the complementary bases. Slipped strand mispairing is one explanation for the origin and evolution of Repeated sequence DNA repetitive DNA sequences . ref name Levinson cite journal author Levinson, G. & Gutman, G. A. year 1987 title Slipped Strand Mispairing A Major Mechanism for DNA Sequence Evolution journal Mol. Biol. Evol. volume 4 issue 3 pages 203 221 pmid 3328815 ref Slipped Strand Mispairing has also been shown to function as a Phase variation mechanism in certain bacteria. ref name Torres Cruz cite journal author Torres Cruz, Joshua and van der Woude, Marjan W. year 2003 title Slipped Strand Mispairing Can Function as a Phase Variation Mechanism in Escherichia coli journal Journal of Bacteriology pages 6990 6994 doi 10.1128 JB.185.23.6990 6994.2003 volume 185 pmid 14617664 issue 23 pmc 262711 ref Self acceleration SSM events can result in either insertions or deletions. Insertions are thought to be self accelerating as repeats grow longer, the probability of subsequent mispairing events increases. Insertions can expand simple tandem repeats by one or more units. In long repeats, expansions may involve two or more units. For example, insertion of a single repeat unit in GAGAGA expands the sequence to GAGAGAGA, while insertion of two repeat units in GA sub 6 sub would produce GA sub 8 sub . Evolution of diverse adjacent repeats The combination of SSM events with point mutation is thought to account for the evolution of more complex repeat units. Mutations followed by expansion would result in the formation of new types of adjacent short tandem repeat units. For example, a transversion could change the simple two base repeat GA sub 10 sub to GA sub 4 sub GATA GA sub 2 sub . This could then be expanded to GA sub 4 sub GATA sub 3 sub GA sub 2 sub by two subseq ... more details
File Hyperchromicity.svg thumb right 250px Nucleic acid melting curve showing hyperchromicity as a function of temperature Hyperchromicity is the increase of absorbance optical density of a material. The most famous example is the hyperchromicity of DNA that occurs when the DNA duplex is denatured. The UV absorption is increased when the two single DNA strands are being separated, either by heat or by addition of denaturant or by increasing the pH level. The opposite, a decrease of absorbance is called hypochromicity . Heat denaturation of DNA, also called DNA melting melting , causes the double helix structure to unwind to form single stranded DNA. When DNA in solution is heated above its melting temperature usually more than 80 C , the double stranded DNA unwinds to form single stranded DNA. The bases become unstacked and can thus absorb more light. In their native state, the bases of DNA absorb light in the 260 nm wavelength region. When the bases become unstacked, the wavelength of maximum absorbance does not change, but the amount absorbed increases by 30 40 . a double strand DNA dissociating to single strands produces a sharp cooperative transition. Hyperchromicity can be used to track the condition of DNA as temperature changes. The transition melting temperature T sub m sub is the temperature where the absorbance of UV light is 50 between the maximum and minimum, i.e. where 50 of the DNA is denatured. The hyperchromic effect is the striking increase in absorbance of DNA upon denaturation. The two strands of DNA are bound together by the mainly stacking interactions and hydrogen bonds and hydrophobic effect between the complementary bases. The hydrogen bond limits the resonance of the aromatic ring so the absorbance of the sample is limited as well. When the DNA double helix is treated with denatured agents, the interaction force holding the double helical structure is disrupted. The double helix then separates into two single strands which are in the ra ... more details
the two strands being annealed. The hybrids may be dissociated by thermal denaturation biochemistry denaturation , also referred to as melting. Here, the solution of hybrids is heated to break the hydrogen ... A T and G C are formed, of which the latter is more stable. Denaturation DNA denaturation, also called ... are used to refer to the process as it occurs when a mixture is heated, although denaturation can ... 2009 . The process of DNA denaturation can be used to analyze some aspects of DNA. Because cytosine ... 0076 6879 67 12133 2 ref Higher temperatures are associated with high GC content. DNA denaturation ... the reformation Denaturation biochemistry Nucleic acid denaturation renaturation of complementary ... to develop a different model may not be justifiable. See also DNA Denaturation biochemistry Melting ... more details
conditions, e.g. towards Denaturation biochemistry denaturation by heat or organic solvents or by autolysis ... structure, essential for their activity, by Denaturation biochemistry denaturation unfolding . Improved ... more stable to Denaturation biochemistry denaturation by heat, organic solvents and proteolysis ... denaturation. Subsequent cross linking of these physical aggregates renders them permanently ... more details
denaturation Guanidinium chloride is one of the strongest Denaturation biochemistry denaturant ... aspects of protein denaturation location New York publisher Wiley year 1978 isbn 0471034096 ... more details
chembox verifiedrevid 417523735 Name Cacodyl oxide ImageFile Cacodyl oxide 3D balls.png ImageSize 200px ImageName Ball and stick model of cacodyl oxide ImageFile1 Me4As2O.png ImageSize1 200px ImageName1 Line structure model of cacodyl oxide IUPACName Dimethylarsinous anhydride Section1 Chembox Identifiers CASNo 503 80 0 SMILES C As C O As C C Section2 Chembox Properties Formula C sub 4 sub H sub 12 sub As sub 2 sub O MolarMass 255.98 g mol Density MeltingPt BoilingPt Cacodyl oxide is a chemical compound of the chemical formula formula CH sub 3 sub sub 2 sub As sub 2 sub O. This organoarsenic compound is primarily of historical significance as it is sometimes considered to be the first organometallic compound synthesized in relatively pure form. ref Elschenbroich, C. Organometallics 2006 Wiley VCH Weinheim. ISBN 978 3 29390 6 ref ref cite journal title Cadet s Fuming Arsenical Liquid and the Cacodyl Compounds of Bunsen first Dietmar last Seyferth journal Organometallics year 2001 volume 20 issue 8 pages 1488&ndash 1498 doi 10.1021 om0101947 url http pubs.acs.org cgi bin abstract.cgi orgnd7 2001 20 i08 abs om0101947.html ref Cadet s fuming liquid , which is composed of cacodyl and cacodyl oxide, was originally chemical synthesis synthesized by heating sodium acetate with arsenic trioxide . It has a disagreeable odor and is toxic. It has been used as a Denaturation biochemistry denaturing and warning agent. Fact date September 2007 See also Arsenic Arsine Cacodylic acid References references Category Organoarsenic oxides organic compound stub ar fa fr Oxyde de cacodyle ... more details
A bitterant is a chemical that is added to a product to make it olfaction smell or taste Bitter taste Bitter bitter . Bitterants are commonly used as aversive agent s to discourage the inhalation or ingestion of toxic substances. Examples of use The addition of a bitterant to ethanol Denatured alcohol denatures the product. Bitterants are used in antifreeze to prevent pet and child poisonings. ref Cheryl Hogue, Safer Antifreeze Bill Is Moving Fast, Chemical & Engineering News , July 31, 2006, pp. 39 41. http pubs.acs.org cen government 84 8431gov1.html available here. Access date January 3, 2009. ref Gas duster s often use a bitterant to discourage inhalant abuse , although this can cause problems for legitimate users. The bitterant not only leaves an intolerably bitter flavor in the air, but also leaves a bitter residue on objects, like screens and keyboards, that may transfer to hands and cause problems such as when eating later. Citation needed date March 2011 Examples of bitterants Denatonium is used in a variety of applications as an aversive agent. ref Cite conference first last authorlink coauthors title Final Report Study of Aversive Agents booktitle pages publisher Consumer Product Safety Commission United States of America date 18 November 1992 location url http www.cpsc.gov LIBRARY FOIA foia99 os aversive.pdf doi id accessdate 15 November 2010 ref Sucrose octaacetate Quercetin Brucine Quassin See also Denaturation food , the deliberate addition of an unpleasantly flavored or poisonous substances to food in order to prevent the consumption of the food for various reasons. Adulterant , a substance added to food for deceptive or malicious reasons, for example to cheaply replace legitimate ingredients. References reflist Category Safety Category Inhalants Category Food additives ingredient stub science stub ... more details
Orphan date October 2009 Stem bromelain SBM 3.4.22.32 a Protease proteolytic enzyme is a widely accepted Phytotherapy phytotherapeutical drug member of bromelain family of proteolytic enzymes obtained from Pineapple Ananas comosus 1 . Some of SBM therapeutic benefits are reversible inhibition of platelet aggregation, angina pectoris , bronchitis , sinusitis , surgical traumas, thrombophlebitis , pyelonephritis and enhanced Absorption pharmacokinetics absorption of drugs , particularly of antibiotic s 2 4 . Its anti metastasis , and anti inflammatory activities are apparently independent of its proteolytic activity 2 . Although poorly understood the diverse Pleiotrophy pleiotrophic effects of SBM seems to depend on its ability to traverse the membrane barrier 5 6 , a very unusual property of this protein. The above properties of SBM makes It all the more important to understand its structure and folding properties. references 1.Buck M 1998 Trifluoroethanol and colleagues cosolvents come of age. Quart Rev Biophys 31 297 355. 2.Thomas PD, Dill KA 1993 Local and nonlocal interactions in global proteins and mechanisms of alcohol denaturation. Protein Sci 2 2050 2065. 3.Liu Y, Bolen DW 1995 Peptide backbone plays a dominant role in protein stabilization by naturally occurring osmolytes, Biochemistry 34 12884 12891. 4.Blanco FJ, Jim nez MA, Pineda A, Rico M, Santoro J, Nieto JL 1994 NMR solution structure of the isolated N terminal fragment of protein G B1 domain. Evidence of trifluoroethanol induced native like hairpin formation, Biochemistry 33 6004 6014. 5.Sch nbrunner N, Wey J, Engels J, Gerog H, Kiefhaber T 1996 Native like structure in a trifluoroethanol induced partially folded state of the all sheet protein tendamistate. J Mol Biol 260 432 445. 6.Hirota N, Mizuno K, Goto Y 1998 Group additive contributions to the alcohol induced helix formation of melittin. J Mol Biol 275 365 378. Category Hydrolases ... more details
Orphan date February 2009 The Harmonic scalpel is a cutting instrument used during surgical procedures to simultaneously cut and coagulate tissue. The Harmonic brand is manufactured and distributed by Ethicon Endo Surgery a subsidiary of Johnson & Johnson . The instrument is similar to a Bovie , but superior in that it can cut through thicker tissue, creates less smoke, and may offer greater precision. However, the harmonic scalpel is not as easily maneuverable as the Bovie, and takes longer to cut and coagulate tissue. Additionally, while a Bovie can be used to coagulate bleeding tissue at any time, the Harmonic scalpel only coagulates as it cuts. The Harmonic scalpel causes less lateral thermal damage than the Bovie . Whereas a Bovie performs its action via an electrical current and production of heat , the Harmonic scalpel cuts via vibration. The scalpel surface itself cuts through tissue by vibrating in the range of 55,500 Hz. The vibration cuts through the tissue and seals it using protein denaturization, rather than heat. A good analogy is whisking an egg white denaturation of the protein by vibration rather than heat. References cite journal author Msika S, Deroide G, Kianmanesh R, et al. title Harmonic scalpel in laparoscopic colorectal surgery journal Dis. Colon Rectum volume 44 issue 3 pages 432 6 year 2001 month March pmid 11289292 doi url cite journal author Awwad JT, Isaacson K title The harmonic scalpel an intraoperative complication journal Obstet Gynecol volume 88 issue 4 Pt 2 pages 718 20 year 1996 month October pmid 8841266 doi url cite journal author Siperstein AE, Berber E, Morkoyun E title The use of the harmonic scalpel vs conventional knot tying for vessel ligation in thyroid surgery journal Arch Surg volume 137 issue 2 pages 137 42 year 2002 month February pmid 11822946 doi url Category Surgery cs Harmonick skalpel ... more details
Pfam box Symbol HSP20 Name Hsp20 alpha crystallin family image width caption Pfam PF00011 InterPro IPR002068 SMART Prosite PDOC00791 SCOP 1shs TCDB OPM family OPM protein PDB PDB3 2byu I 47 137 PDB3 1gme A 47 150 PDB3 1shs F 46 147 Heat shock protein Hsp20 is a Protein family family of heat shock proteins . Prokaryotic and eukaryotic organisms respond to heat shock or other environmental stress by inducing the synthesis of proteins collectively known as heat shock proteins hsp ref name PUB00000102 cite journal author Lindquist S, Craig EA title The heat shock proteins journal Annu. Rev. Genet. volume 22 issue pages 631 677 year 1988 pmid 2853609 doi 10.1146 annurev.ge.22.120188.003215 ref . Amongst them is a family of proteins with an average molecular weight of 20 Kd, known as the hsp20 proteins ref name PUB00001454 cite journal author Merck KB, de Jong WW, Bloemendal H, Groenen PJ title Structure and modifications of the junior chaperone alpha crystallin. From lens transparency to molecular pathology journal Eur. J. Biochem. volume 225 issue 1 pages 1 9 year 1994 pmid 7925426 doi 10.1111 j.1432 1033.1994.00001.x ref . These seem to act as protein chaperones that can protect other proteins against heat induced denaturation and aggregation. Hsp20 proteins seem to form large heterooligomeric aggregates. Structurally, this family is characterised by the presence of a conserved C terminal domain of about 100 residues. Human proteins containing this domain CRYAA CRYAB HSPB1 HSPB2 HSPB3 HSPB6 HSPB7 HSPB8 HSPB9 References reflist InterPro content IPR002068 Category Protein domains Category Protein families Category Membrane proteins ... more details
Protein Denaturation and the Properties of Protein Groups , Adv. Protein. Chem. , 2 , 361 386. Anson ML. 1953 The denaturation of proteins in Les Proteines , Neuvi me Conseil de Chimie, Institut International ... more details
to a denaturation process. In addition to cleavage of peptide bonds, it also catalyzes peptide amide ... that denaturation biochemistry denature proteins, such as sodium dodecyl sulfate SDS and urea ... more details
Cleavable detergents , also known as cleavable surfactants , are special surfactant s detergents that are used in biochemistry and especially in proteomics to enhance protein denaturation biochemistry denaturation and solubility. The detergent is rendered inactive by cleavage, usually under acid ic conditions, in order to make the sample compatible with a following procedure or in order to selectively remove the cleavage products. Applications for cleavable detergents include protease digestion of protein s such as in gel digestion with trypsin after SDS PAGE and peptide extractions from electrophoresis gels. Cleavable detergents are mainly used in sample preparations for mass spectrometry . PPS PPS , available as PPS Silent Surfactant from Protein Discovery , is the abbreviation for sodium 3 4 1,1 bis hexyloxy ethyl pyridinium 1 yl propane 1 sulfonate. This acetal ic detergent is split under acidic conditions into hexanol and the zwitterion ic 3 acetyl 1 3 sulfopropyl pyridinium . ref http www.proteindiscovery.com pages support faq pps.html PPS frequently asked questions the chemical structure on this site is wrong ref ref cite journal author Norris JL, Porter NA, Caprioli RM year 2003 title Mass spectrometry of intracellular and membrane proteins using cleavable detergents journal Anal. Chem. volume 75 issue 23 pages 6642 6647 pmid 14640740 doi 10.1021 ac034802z ref Image PPS cleavable detergent.png 250px PPA cleavable detergent math longrightarrow math 2 Image Hexanol chemical structure.png 100px math math Image 3 acetyl 1 3 sulfopropyl pyridinium.png 150px ProteaseMAX ProteaseMAX is the brandname of Promega for sodium 3 1 furan 2 yl undecyloxy carbonylamino propane 1 sulfonate. This cleavable detergent is sensitive to heat and acid and is degraded during a typical trypsin digestion into the uncharged lipophilic compound 1 furan 2 yl undecan 1 ol and the zwitterion ic 3 aminopropane 1 sulfonic acid homotaurine , which can be removed by C18 solid phase extraction ... more details
nucleotide mismatches will have different amplification efficiencies if the denaturation step of PCR ... Denaturation stage. DNA is denatured at a high temperature spaced ndash usually Convert 94 C ... PCR Fast COLD PCR differs from Full COLD PCR in that the denaturation and intermediate annealing stages ... great that ensuring the formation of the mutant wildtype heteroduplex DNA is not needed. Thus the denaturation ... denaturation temperature, the reaction will discriminate towards the products with the lower Tm i.e. ... denaturation temperature control during PCR to within 0.3 C 0.54 F . A suitable critical temperature ... more details
requires extreme conditions that cause protein denaturation. The non reversible nature of the avidin ... dispersion studies of the heat denaturation of avidin and the avidin biotin complex journal Biochemical .... The study disagreed with prior assumptions that the binding site of avidin is destroyed on heat Denaturation biochemistry denaturation , concluding that protein denaturation was not equivalent to loss ... more details
Unreferenced date August 2010 A thermoacidophile combination of thermophile and acidophile is an extremophile extreme archaea archeon which thrives in acid ous, sulfur rich, high temperature environments. Thermoacidophiles prefer temperatures of 70 80 C and pH between 2 and 3. They live mostly in hot spring s and or within deep ocean vent communities. Classified as an Archaebacteria and an extremophile , Thermoacidophiles are found in places where most organisims would not survive. Taxonomy Thermoacidophiles belong to the Kingdom Archaebacteria, in the Domain biology Domain Archaea . There are many unique characteristics that make up these prokaryotes . They are specially resistant to high temperatures and high acid concentrations. They have a plasma membrane which contains high amounts of saturated fats , and its enzymes are able to withstand extreme conditions without Denaturation biochemistry denaturation . Possibly the progenitor of cellular life The similarities between DNA sequences of thermoacidophiles, and other Archaebacteria, and complex eukaryote s provides support to Archae being the progenitor species for the first cellular life on Earth. They were able to thrive on the early, warmer Earth with an atmosphere that lacked oxygen. Comparisons to Eukaryotes and Eubacteria Archaeobacteria constitute the first domain of living organisms, one distinct from that represented by the eubacteria and the eukaryotes . Archaeobacteria are prokaryotes, like eubacteria, however, and therefore are most facilely compared to eubacteria i.e., archaeobacteria represent a monophyletic taxon of bacteria like things . Nevertheless, some aspects of archaeobacteria are more eukaryote like than eubacteria. Most fascinating about archaeobacteria are the often bizarre environments which they inhabit, including water whose temperature exceeds that of hot springs. Identification Archaeobacteria nevertheless often may be differentiated in terms of Gram staining. This is because the Gra ... more details
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