How do you calculate H-factor pulping?
His equation of pulp yield is in the form of the equation: Yield = A − B [ ( log H ) ( EA ) n ] , where EA is the effective alkali and H is the H-factor. The coefficients were solved for a variety of different species of both hardwoods and softwoods.
What is the H-factor in pulp and paper?
H-factor is a kinetic model for the rate of delignification in kraft pulping. It is a single variable model combining temperature (T) and time (t) and assuming that the delignification is one single reaction.
How do you calculate effective alkali?
Effective alkali is determined by titration with acid to the thymolphthalein end- point (pH 9,5). Formaldehyde is then added to convert the hydrogen sulphide ions to a strong base and active alkali is determined by con- tinuing the titration to the phenolphthalein end- point (pH 8).
What is the difference between h-index and impact factor?
The h index is used to evaluate a researcher’s or an author’s scientific productivity based on the number of published research papers and their citations. In contrast, the impact factor evaluates the total number of articles cited within the Journal during the previous two years.
Why do people H factor?
The reason behind the H-factor Consonant sounds are sounds made by a partial or complete blockage of air as it passes out from the lungs and out through the mouth. Vowel sounds are the opposite. They come out freely from the mouth. All you have to do is just open your mouth and let the vowel out.
What is Sulfidity in soda pulping?
Sulfidity: pulp yield and pulp strength Sulfidity does not increase pulp yield. The hydrogen sulfide (HS−) ion improves greatly the selectivity and the delignification rate during kraft pulping, but do not have any direct effect on protecting the cellulosic material (i.e., chemically increasing pulp yield).
What is total titratable alkali?
Total titratable alkali (TTA) is the sum of all of the bases in the white liquor that can be titrated with strong acid. Generally, it is considered as NaOH, Na2S, and Na2CO3 (as Na2O) although small amounts of Na2SO3 and other acids might be present.
How is h-index impact factor calculated?
An author with 10 papers, where 5(N) papers were cited 5(N) times each one the h-index is 5. If 8(N) papers were cited 8(N) times each one then the h-index is 8. Hope, This will help you to find how the Journals and abstract indexing sites calculate Impact Factor(JIF) for a publication and H-Index for an author.
How h-index and impact factor is calculated?
The value of h is equal to the number of papers (N) in the list that have N or more citations. In the example below, the researcher would have an h-index of 8, as 8 articles have been cited at least 8 or more times, and the remaining articles have each been cited 8 times or less.
How do you reduce H factor?
- Watch out for words that begin with the vowel sounds.
- Reduce your volume when you are about to hit on those words that begin with the vowel sounds.
- The letter ‘h’ is produced while you exhale.
- Compile lots of words that begin with the vowel sounds and practice with them.
- Let’s work with you on this.
Can H factor be corrected?
Practice with Chants and Tongue Twisters: Like most issues in English pronunciation, there is no elixir that can help cure the H-factor. However, a strategic and consistent learning and practicing would rid your speech of every form of the H-factor.
What is Kappa factor?
Nuclear factor kappa B (NF-kappa B) is an ubiquitous rapid response transcription factor in cells involved in immune and inflammatory reactions, and exerts its effect by expressing cytokines, chemokines, cell adhesion molecules, growth factors, and immunoreceptors.
How do you calculate Sulfidity?
Definition and calculation of the sulfidity Sulfidity is the per cent ratio of the sodium sulfide (Na2S) to the active alkali A.A. (i.e., NaOH + Na2S) or to the effective alkali E.A. (i.e., NaOH + ½Na2S), or to the total titratable alkali TTA (i.e., NaOH + Na2S + Na2CO3, etc).
What is kraft lignin used for?
Kraft lignin can be used as lignosulfonates and dispersants, technical carbons (e.g., carbon fibers), transportation fuels, bioplastics, adhesives, etc.
What is Recausticizing?
OVERVIEW. The recausticizing process produces cooking liquor for the digester from recycled inorganic chemicals generated in the recovery boiler and lime kiln. The process involves one very simple chemical reaction followed by process steps utilizing various types of liquid solid separation equipment.
How do you calculate H factor?
To find an author’s h-index in WOS:
- Enter the name of the author in the top search box (e.g. Smith JT). Select Author from the drop-down menu on the right.
- Click on Search.
- Click on Citation Report on the right hand corner of the results page. The H-index is on the right of the screen.