excel~~last post :'(

INTRODUCTION


EXCEL  is a spreadsheet application written and distributed by Microsoft for Microsoft Windows and Mac OS X.Its features includes calculation ,and graphing tools,and also It has been a very widely applied spreadsheet for these platforms, especially since version 5 in 1993.It is useful in these days especially when you are working in companies.

PART 1 : BEER'S LAW SCATTER PLOT AND LINEAR REGRESSION

Beer's Law states that there is a linear relationship between concentration of a colored compound in solution and the light absorption of the solution. This fact can be used to calculate the concentration of unknown solutions, given their absorption readings. First, a series of solutions of known concentration are tested for their absorption level. Next, a scatter plot is made of this empirical data and a linear regression line is fitted to the data. This regression line can be expressed as a formula and used to calculate the concentration of unknown solution.

PART 2: TITRATION DATA PLOTTING

Creating a Scatter Plot of Titration Data

In this next part of the tutorial, we will work with another set of data. In this case, it is of a strong acid-strong base titration. With this titration, a strong base (NaOH) of known concentration is added to a strong acid (also of known concentration, in this case). As the strong base is added to solution, its OH- ions bind with the free H+ions of the acid. An equivalence point is reached when there are no free OH- nor H+ ions in the solution. This equivalence point can be found with a color indicator in the solution or through a pH titration curve. 

TUTORIAL~~

wants to explore new things for excel?here we go. 

p/s: last post for this blog is EXCEL.hope all of us will EXCEL tooooooooo!!

thanx madam linda.. :))

sMiLes~~

SMILES
The simplified molecular input line entry specification or SMILES is a specification for unambiguously describing the structure of chemical molecules using short ASCII strings

SMILES strings can be imported by most molecule editors for conversion back into two-dimensional drawings or three-dimensional models of the molecules 

Ethene	C=C
Chloroethene	ClC=C
1,1-Dichloroethene	ClC(Cl)=C
Trichloroethene	ClC(Cl)=CCl

go to SMILESCAS database. :)

protein data bank~~

The Protein Data Bank (PDB) is a repository for the 3-D structural data of large biological molecules, such as proteins and nucleic acids. (See also crystallographic database). The data, typically obtained by X-ray crystallography or NMR spectroscopy and submitted by biologists and biochemists from around the world, are freely accessible on the Internet via the websites of its member organisations (PDBe, PDBj, and RCSB). The PDB is overseen by an organization called the Worldwide Protein Data Bank, wwPDB.
The PDB is a key resource in areas of structural biology, such as structural genomics. Most major scientific journals, and some funding agencies, such as the NIH in the USA, now require scientists to submit their structure data to the PDB. If the contents of the PDB are thought of as primary data, then there are hundreds of derived (i.e., secondary) databases that categorize the data differently. For example, both SCOP and CATH categorize structures according to type of structure and assumed evolutionary relations; GO categorize structures based on genes.

image of ftsh peptidase

Gene Ontology

Molecular function	GTP binding
Biological process	SRP-dependent cotranslational protein targeting to membrane

EC#: 3.6.5.4 
Authors:

Estrozi, L.F.,   Boehringer, D.,   Shan, S.-O.,   Ban, N.,   Schaffitzel, C. 
Experiment: ELECTRON MICROSCOPY

Chains:A

image of thermolysin

Gene Ontology

Molecular function

metalloendopeptidase activity

EC#: 3.4.24.27
Authors:   Juers, D.H.,   Weik, M.
Experiment: X-RAY DIFFRACTION with resolution of 2.20 Å
Chains:E

image of leucyl aminopeptidase

Gene Ontology

Cellular component	intracellular
Molecular function	aminopeptidase activity
Biological process	proteolysis

EC# : 3.4.11.1
Authors:   Natarajan, S.,   Huynh, K.-H.,   Kang, L.W.
Experiment:X-RAY DIFFRACTION with resolution of 2.60 Å
Chains:A, B