fem analysis of dissimilar metals on Nd:YAG laser welding ....etc

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CONDUCTIVITY σ ,FERMI LEVEL ,
MEAN FREE PATH &
RELAXATION TIME ť
FOR TYPICAL MONO-VALENT METALS
IS SHOWN IN TABLE

The conductivity σ may be obtained experimentally .
Further we can get ť by using eqn given below
σ = ( n*Qe2 *ť )/me ---------(1)
but ť obtained may not be accurate but we will get an idea of magnitude of ť . In a monovalent metal no of free e- /m3 is equals the no of atoms /m3 . From table we find that relaxation time T is of the order of 10-14 sec .Thus we can ....etc

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i am looking for biosorption heavy metals ppt download. ....etc

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CHARACTERISATION AND SORPTION PROPERTIES TO HEAVY METALS (Cu2+, Pb2+) OF CHITOSAN COMPLEXES EXTRACTED FROM COCKROACHES OF RWANDA

ABSTRACT
Cockroaches of Rwanda are one of the most important sources of chitosan. In chitosan extraction from Cockroaches, conditions for deproteinization were: 8% NaOH at 95 ºC for 1 h and demineralization involved treatment with 6.7 % HCl at room temperature. Yield of extract products was ..... Chitin-glucan insoluble complexes in the extracted products were identified by FTIR specus ....etc

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which two metal can not be welded and why they can not be welded and we need the reason for that? ....etc

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AN ORGANISATIONAL STUDY AT KERALA MINERALS AND METALS LTD.
SUBMITTED BY
REMYA.S
REG.NO:2887017


INDUSTRIAY PROFILE
Industries play a significant role in almost every economy but India context it is an important as oxygen for breathing. Industrial development has been accorded great importance in Indian planning. On account of industrial development there is increase in production, employment and national income.India is the second largest growing economy in the world. This is equally applicable to the Titanium Diox ....etc

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BIOSORPTION OF METALS


SELECTION OF BIOMASS
While choosing the biomass for metal biosorption, its origin is a major factor .

Biomass can come from, activated sludge or fermentation waste from industries like those of food, diary and starch .

organisms coming from their natural habitats are good sources of biomass.

Fast growing organisms that are specifically cultivated for biosorption purposes


TYPES OF BIOMASS

Agricultural products

Seaweed ....etc

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Welding

Welding is the process of joining together pieces of metal or metallic parts by bringing them into intimate proximity and heating the place of content to a state of fusion or plasticity

following are the key features of welding:
The welding structures are normally lighter than riveted or bolted structures.
The welding joints provide maximum efficiency, which is not possible in other type of joints.
The addition and alterations can be easily made in the existing structure.
A weld ....etc

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