How to isolate alfa, beta and gamma cellulose separately?

More Yehezkiel Steven Kurniawan's questions See All

How do we evaluate whether the results of Fullprof Rietveld analysis are acceptable?

I am new to Fullprof and trying to perform a Rietvied analysis of a rare-earth zirconate sample. I was informed that one of the parameters to evaluate whether the results are acceptable is by...

10 July 2024 5,827 1 View

Plasma bonding of PDMS to a thin glass (500 um or less). is it possible?

With oxygen plasma cleaner, i usually bond PDMS to 1 mm glass without any problem. Changing to 525um thickness glass, so far, I got one time success from plenty of failed attempts. Even in that...

25 April 2024 3,622 0 View

How can we write an interpretation of normal vs non normal data after conducting comparison statistical testing?

Dear seniors, We have two independent groups with normal and non-normal data distribution. For the normally distributed data, we present the data in the form of mean and its standard deviation...

05 March 2023 3,050 10 View

How to drawing earth dam geometry on FLAC 3D?

Hello everyone, I am learning how to drawing geometry earth dam on flac 3d. I have a problem with bad blocks. I cant make zone because notification says "bad blocks". I started draw 2d geometry...

27 December 2022 7,709 3 View

How to create topography surface for FLAC 3D?

I want to modelling 3d dynamic analysis for earth dam in Flac 3D. I have read several article. Kubrix-Geo can help to make Topography surface, but i cant found the software yet. Even in itasca...

11 December 2022 7,648 1 View

How to Compare Logit Regression Marginal Effects - Different Years, Same Variables in R?

Hi everyone! I'm a newbie in R, so I'd like to ask for some help or suggestion on my regression. I have 2 datasets (2000 and 2010) from labor force survey of a country. The dependent variables:...

17 November 2022 7,145 3 View

How to model contact elements on reinforcing steel with "Wire" type in Abaqus.? is this possible.?

Dear All, when we model the bond-slip behavior between reinforcement and concrete in ABAQUS, should the reinforcement always be modeled as a 3D solid element.? Is it not possible if with Wire...

19 July 2021 8,086 3 View

Is there any books or journal that specifically discussed TPR in detail?

I am designing a metal oxide catalyst and among many characterization of this sample, TPR emerges quite significantly. The brief explanation in journal is limited to the sample that is...

21 January 2021 6,563 1 View

How to calculate contribution of each emission sector to atmospheric concentration of green house gasses?

If we measure atmospheric greenhouse gases for instance CH4 (methane) using CRDS instrument, how we can measure contribution emission CH4 from vehicle, rice paddy, wet land, farm etc, and how...

24 February 2020 3,754 3 View

How to calculate Bloch Spectral Functions (BSF) of disordered systems such as Co2Fe(Ga0.5Ge0.5) (CFGG) using GGA+U method in SPRKKR code?

In SPRKKR, we cannot calculate the bandstructure directly from disordered system, but BSF is still possible. However, without U, I still can calculate the BSF in disordered system like CFGG....

10 September 2019 8,893 0 View

Is there any cases algae not using the nutrient from the wastewater and grow normally?

I am working on microalgae cultivation using waste water. The initial concentration of nutrients were less but the microalgae has achieved biomass growth of 2 g/L. The final concentration of...

08 August 2024 4,812 2 View

Is it possible to use a safer acid instead of monochloroacetic acid to convert bacterial cellulose to carboxymethyl cellulose?

Hi, researchers, Is it possible to use a safer acid instead of monochloroacetic acid to convert bacterial cellulose to carboxymethyl cellulose?

29 July 2024 4,570 0 View

Does the soil contamination correction factor for decomposing leaf biomass vary according to space and season?

The question refer to leafy biomass decomposition using litterbag techniques.

11 July 2024 2,078 0 View

I am carrying out an experiment on Trichoderma. How can I measure OD of the fungal growth after 7 days?

I am carrying out an experiment on Trichoderma and need to measure OD of the fungal growth after 7 days. Unlike bacteria, fungus clump together making It difficult to get OD for the fungal growth....

11 July 2024 6,251 1 View

Full Enquiry On Biomass Energy In engineering Technology?

How is biomass energy essential in the power generation in a country.

08 July 2024 9,477 2 View

Is the use of microcrystalline cellulose MCC 102 in direct compression technology justified, given the low flowability of this excipient?

Hello everyone reading this topic! It is well known that microcrystalline cellulose 102 is recommended for use in direct compression technology, however, like other grades, it has poor flowability...

08 July 2024 2,807 0 View

Hello, could you please share how you measure biomass/growth of Aspergillus oryzae in your lab?

Hi, I would like to gain an insight on the various methods of measuring biomass and growth of Aspergillus oryzae, which you have personally tried and would gladly recommend. Thanks.

08 July 2024 6,057 2 View

How is the deconvolution area method applied to determine the crystallinity of cellulose using X-ray diffraction (XRD)? ?

I use X-ray diffraction (XRD) techniques to quantify the degree of crystallinity in my samples, referring to the following formula (CrI=Acrystal-Aamph/Atotal ). using deconvolution area methods (...

06 July 2024 6,234 9 View

How is the preparation to obtain secondary metabolic extracts?

Hi everyone! I am working with bacteria and fungal collected from marine sediments. I would to know the methodology since the preparation of biomass until the extraction and stored of secondary...

03 July 2024 6,177 3 View

Cellulose degradation rate in anaerobic digestion?

Hello, I am looking for (estimated) degradation rates of cellulose in a classic anaerobic digestion setup (meso or thermophilic, WWTP sludge, 30+ days of operation) to have an idea of the % of...

01 July 2024 5,867 5 View

Sylvester Peter Antai

It is now possible to separate alpha, beta, and gamma crystalline by relatively simple procedure combining precipitation with zinc glycinate and isoelectric precipitation followed by sephadex 75 chromatography. This method for determination of alpha - , beta - and gamma - cellulose can be applied to bleach of delignified ..... You can use the method of APPI T203 cm - 99 : Alpha - cellulose is pulp fraction resistant to 17.55 and 9.45% sodium hydroxide solution under ..... For details consult https://www.research.cnr.ncsu.edu

Ahmed Fouzi Tarchoun

Dear Yehezkiel Steven Kurniawan

the answer is available in this standard test method

Yehezkiel Steven Kurniawan

Thank you very much, Dr. Antai and Dr. Tarchoun for giving the valuable suggestion.

Ursula Montoya Rojo

Thank you very much for sharing the information.

Gustavo Jesús Guzmán-Melgarejo

I`m using Tappi method to determinate cellulose fractions in sugarcane bagasse but Do you know if there is any interference from using this method on raw material???