IAETSD JOURNAL FOR ADVANCED RESEARCH IN APPLIED SCIENCES ISSN NO: 2394-8442

Chemical Composition: The Pre Requisite Criteria For Utility, (Study Of Garuchokua, Bambusa Pallida And Bambusa Assamica Of Kokrajhar District Of Btc, Assam, India).

Sanjib Brahma*1, B.K., Brahma2. 1Assistant Professor, Department of Botany, Science College, Kokrajhar 2Associate Professor, Department of Biotechnology, Bodoland University *[email protected].

Abstract- The present study has included all the major chemical composition (alcohol-tolune solubility, hot water solubility, ash content, lignin content, α-cellulose content and hollocelulose content) for analysis. The results obtained have shown similarities with the results of chemical composition of several as described by many workers. The gross chemical composition of B.garuchokua , B.pallida and B.assamica are comparable with regular used bamboo. .

The chemical content of studied bamboo species with having, alcohol-tolune extractives (4.29±0.06 to 5.72±0.20 percent) , holocellulose ( 76.15±0.39 to 64.31±0.45, percent) Klason lignin (26.86±0.81to 20.44±0.94 percent.), ash content (1.16±0.07 to 1.04±0.03 percent) are close to the chemical content of many regular used bamboo including D. brandissii which are mostly used in production of pulp including quality news print paper.

Kaywords- Bamboo, Cellulose, Kokrajhar, Lignin, Wood alternative.

I. INTRODUCTION

Bamboo belongs to the family of or Gramineae. There are about 1200 to 1575 bamboo species from 50 to 60 genera worldwide, out of which half of the bamboos grown in Asia are mostly in the Indo-Burmese region which is their area of origin [1]. In India, other than state of Jammu and Kashmir, bamboos are naturally distributed in almost all the states. More than 50 percent of total bamboos in India are found in North-eastern states, ([2], [3]). Arunachal Pradesh recorded about 30 species under 12 genera. In thorough studies there is chances of increase of this number up to 60 species and around 18 genera [4].It is studied that 10 percent of bamboo found in north east India are rare and endangered [2]. Kokrajhar district has good bamboo resources in terms of bamboo species diversity. The district has occurrence of 16 bamboo species under 5 genera [5].

The understanding of chemical content of bamboo is the pre requisite criteria for its utility. Although the study on this aspect of certain regular used bamboo have been done by several worker, but such study on present selected bamboo species have not been done before in Kokrajhar district. The result of present study may be the solution of most important question regarding criteria for bamboo utility. The findings of this study may be the key for recommendation of these 3(three) studied bamboo species for different application.

Cellulose, hemicelluloses and lignin are the three primary polymeric substances that constitute cell wall of bamboo. About 90 to 98 percent of total constituent of cell wall is made up of large molecules of these substances. The rest 2 to 10 percent are the extractive with lower molecular weight compound [6].

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The holocellulose content of bamboo does not show much difference with the age, whereas the content of α-cellulose, lignin, extractive and ash are increased with the increasing age [7]. It is studied that the starch content in bamboo remain throughout the age, as the ground parenchyma of 12 years old bamboo have starch along the culm length [8]. The carbohydrate content has relation with natural durability of bamboo as many biological agents that degrade bamboos withstand these chemicals. Bamboo is very particularly harmed by mold, fungi and borer insects. Natural durability of bamboo varies 1 to 36 months with species and climatic conditions [9]. High amount of starch content makes bamboo very vulnerable to staining fungi and powder-post beetles attack [10].

The bamboo lignin is unique as compared to other lignin. Chemically it is made up of three phenyl-propane units, p- coumaryl, coniferyl and sinapyl alcohols through biosynthesis [11]. The lignin content of bamboo has positive and negative relation with fibre morphology. Fiber diameter has relation with lignin as in smaller fiber diameter lignin content is more [12].

Many researches on bamboo have been carried out by gathering sufficient knowledge relating to its gross wood quality and other characters including chemical composition. This knowledge helps in understanding of its suitability for new avenue of application. Bamboo is now getting its advance application, beginning with traditional handicraft and conventional composite to advanced polymer bio-composite.

Viewing the present trends of decreasing in forest cover and shortage of timber supply the finding of forest based wood alternative is important inventory which can relate the analytical study of chemical composition of bamboo species. Searching of forest based wood substitute is the broad objective of this study, as the judicious application of bamboo may reduce the most exploited timber based wood uses from natural forest. The present study on ‘Comparative studies of chemical composition of three numbers of bamboo species of Kokrajhar district of BTAD, Assam, India’ is carried out.

II. MATERIALS AND METHOD

The sample was collected from four directions of Kokrajhar district. The culms were randomly selected and care was taken to select the culms almost of same age of 3 years. The age of the culms were ascertained by direct observation as well as method proposed by [13] and [14]. The choosing of 3 years old bamboo is based on the knowledge that the industrial applicability of bamboo culm of this age was found more [6]. The culms were cut at about 30cm. above the ground level, as cuttings of the culms below that level will affect the growing rate of the other culms in the bamboo clump [15]. Harvesting of bamboo for sample was done during the month of January. The maintaining of month and season for collection of sample was done as per [16]. Five (5) numbers of individual culm from each species were harvested. Altogether 15 numbers of individual culm from 3 numbers of bamboo species were collected.

For study of chemical composition, the collected bamboo samples were made small blocks of around 2g. and also grinded into powder. To perform the other experiment the pieces of bamboo were kept in sealed plastic bag. All the samples were collected from the CHD (Chest Height Diameter) which comes around 137.16cm. Portion of the culm.

With this sample the following test were performed. 1. Determination of Alcohol-tolune solubility content (ASTM D 1107-56; Reapproved 1972). 2. Determination of Water solubility content.(ASTM 1110-56; Reapproved 1977). 3. Determination of Ash content (ASTM D1102-84; Reapproved 1990). 4. Determination of Klason Lignin content (ASTM D 1106-56; Reapproved 1977). . 5. Determination of Holocellulose content (ASTM D 1104-56;Reapproved 1978). . 6. Determination of α-cellulose content (ASTM D 1103-60; Reapproved 1978).

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III. RESULT AND DISCUSSION

1. Alcohol-tolune solubility: The alcohol -tolune extract are primarily wax, resin, gums and fats along with certain water soluble substances. Reference [17] studied the alcohol -tolune solubility of brandisii .His result shows the average of alcohol-toluene solubility content of 3 years old D. brandisii with 2.06±0.15 and also shows the increase of alcohol -tolune extract with the increase of age.

The present study shows the alcohol –tolune solubility content of 3 (three) numbers of bamboo species. The result shows alcohol –tolune solubility content ranges from 4.09±0.06 to 4.95±0.13 percent in these studied species. The result also shows the alcohol –tolune solubility content in cross sectional position (outer, middle and inner) within a culm. The inner position shows the higher alcohol –tolune solubility content than middle and outer which followed the same pattern of alcohol – tolune solubility content described by [18].

Table.1: Average of alcohol –tolune solubility content of 3(three) number of studied bamboo species showing three cross sectional position outer, middle and inner in g/100g.

Position Bambusa garuchokua Bambusa pallida Bambusa assamica Outer 3.56±0.10 3.65±0.06 2.87±0.20 Middle 4.19±0.09 4.50±0.15 3.36±0.18 Inner 4.62±0.07 4.95±0.13 4.09±0.06

The data presented in this table are the average values of at least 5 samples per species and per position. 6 5 4 Outer 3 Middle 2 Inner 1 0 B. garuchokua B.pallida B.assamica

Figure 1: Average of alcohol –tolune solubility content of 3(three) number of studied bamboo species showing three cross sectional position outer, middle and inner in g/100g.

2. Hot water solubility content: The hot water solubility content of bamboo culm primarily consists of tannin, gum, sugars, starch and some coloring substances. The result of the present study shows that the hot water solubility content of different species is different. The hot water solubility content ranges from 5.34±0.03 to 6.81±0.26 percent. The result shows the B.assamica with lowest content of 5.34±0.03 percent and B.pallida with highest content of 6.81±0.26 percent. The result of present study also satisfied the findings of both [17]and [18] by having highest hot water solubility content in inner position of cross sectional layer as compared to middle and outer position.

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Table .2: Average of hot water solubility content of 3 (three) number of studied bamboo species showing three cross sectional position outer, middle and inner in g/100g.

Position Bambusa garuchokua Bambusa pallida Bambusa assamica Outer 5.67±0.05 4.80±0.15 2.83±0.16 Middle 5.92±0.12 5.49±0.04 4.56±0.19 Inner 6.11±0.08 6.81±0.26 5.34±0.03 The data presented in this table are the average values of at least 5 samples per species and per position.

8

6 Outer 4 Middle 2 Inner 0 B.garuchokua B. pallida B.assamica

Figure 2: Average of hot water solubility content of 3 (three) number of studied bamboo species showing three cross sectional position outer, middle and inner in g/100g.

3. Ash content: The ash content of 3(three) numbers of studied bamboo species was determined. Bamboo ash is primarily composed of calcium, potassium and silica. Ash content of several regular used bamboo have been studied by many authors, [19] reported range of ash contain percentage of 1.90 to 3.50 percent in G. scortechinii. B. blumeana contain ash percentage of 1.67 percent [20]. The result of ash content in present study of 3 (three) number of studied bamboo species can be compared with such findings by different authors. The result of the present study shows ash content percentage ranges from 1.26±0.07 to 1.14±0.03 percent in inner position, 1.10±0.05 to 0.98±0.16 percent in middle position and 1.00±0.10 to 0.86±0.08 percent in outer position. These results shows that in a cross sectional positions of a bamboo culm wall the inner layers have higher ash content than the middle and the outer. This pattern of ash content in 3 (three) numbers of studied bamboo species satisfied the findings of ash content pattern of inner, middle and outer of bamboo culm which shows similarity with findings of [21].The result of the present study shows the highest ash content in B.assamica with 1.26±0.07 percent and lowest ash content in B.garuchokua with 1.14±0.03 percent.

Table 3: Average ash content of 3 (Three) number of studied bamboo species showing three cross sectional position inner, middle and outer in g/100g.

Position Bambusa garuchokua Bambusa pallida Bambusa assamica Outer 0.86±0.08 1.00±0.10 0.99±0.08 Middle 0.98±0.16 1.05±0.09 1.10±0.05 Inner 1.14±0.03 1.20±0.01 1.26±0.07 The data presented in this table are the average values of at least 5 samples per species and per position.

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1.5

1 Outer Middle 0.5 Inner 0 B.garuchokua B.pallida B. assamica

Figure3: Average ash content of 3 (Three) number of studied bamboo species showing three cross sectional position inner, middle and outer in g/100g.

4. Klason lignin content:

A resin free wood extract is hydrolyzed with 72 percent H2SO4 for removing of polysaccharides to obtain lignin [22].The high end normal range of lignin in bamboo lays 20 to 26 percentages and 11 to 27 percentages for biomass of non woody substances [23].

Among the 3 (three) numbers of studied bamboo species, B.garuchokua have the highest lignin content with 26.66±0.81percentage and the B. assamica contains lowest percentage with 20.24±0.94 percent. This study determine the lignin content in its cross sectional layer outer, middle and inner, which follow the same pattern of lignin content by having the highest percentage in outer layer then inner and middle of culm cross section as proposed by [18].

The result also satisfy the relationship between fiber length and lignin content mentioned by [6], as higher the lignin content shorter the fiber length. The middle layer has longer fiber than outer and inner by having less lignin content. Table 4: Klason lignin content of 3 (three) numbers of studied bamboo species showing three cross sectional position outer, middle and inner in g/100g.

Position Bambusa garuchokua Bambusa pallida Bambusa assamica Outer 26.66±0.81 25.05±1.50 20.24±0.94 Middle 19.91±1.37 18.15±0.97 15.18±0.43 Inner 22.53±1.98 24.07±1.09 19.46±0.54 The data presented in this table are the average values of at least 5 samples per species and per position.

30

25 20 Outer 15 Middle 10 Inner 5

0 B.garuchokua B. pallida B.assamica

Figure 4: Klason lignin content of 3 (three) numbers of studied bamboo species showing three cross sectional position outer, middle and inner in g/100g.

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5. Holocellulose content: Holocellulose is the combination of both α-cellulose and hemicelluloses. In bamboo the holocellulose content percentage normally ranges from 50 to 70 percent ([24], [25]). Reference [26] studied holocellulose content of B.tulda, D. hamiltoni, B. balcooa,M. bacciffera, B. arundinacea with 73.0, 73.8, 74.9, 74.1 and 74.1 percent respectively. The result of present study is very much close and comparable by having 75.15±0.95, 69.64±0.51, 64.11±0.45, percent of holocellulose content in B.garuchokua, , B.pallida,, B.assamica respectively.

The holocellulose contain in outer, middle and inner position in the present study followed the same pattern that was explained by [21].

Table 5: Holocellulose content of 3(three) number of studied bamboo species showing three cross sectional position outer, middle and inner in g/100g.

Position Bambusa garuchokua Bambusa pallida Bambusa assamica Outer 75.15±0.95 69.64±0.51 64.11±0.45 Middle 65.88±0.31 64.33±0.78 58.23±1.16 Inner 65.56±0.54 63.78±0.36 58.20±0.51 The data presented in this table are the average values of at least 5 samples per species and per position. 80 70 60 50 Outer 40 Middle 30 Inner 20 10 0 B.garuchokua B.pallida B. assamica

Figure 5: Average Holocellulose content of 3(Three) number of studied bamboo species showing three cross sectional position outer, middle and inner in g/100g.

6. α-cellulose content: The α-cellulose content of four cultivated tropical bamboo G.brang, G.levis, G.scortechinii, G.wrayi under genus Gigantochloa was studied by [6]. In his study it is observed that highest α-cellulose content in G.brang was 51.58 percent and lowest in G.levis with 33.80 percent. Similar study on G.scortechinii and G. laguata was conducted by [27]. The result of his study followed the same pattern of α-cellulose content by having 46.14% to 46.53 percent in G. scortechinii and 48.4 to 56.45 percent in G. laguata.

The result of the present study shows the significant difference of α-cellulose content among the studied bamboo species. The result shows that B.assamica contains highest α-cellulose content of 45.84±2.83 percent and B.garuchokua contains lowest content of 39.52±0.57 percent. This result established a negative relation of Holocellulose content and α-cellulose content, as higher the α-cellulose content lower the holocellulose content. This result also satisfied the pattern of α-cellulose content by having the higher content in outer side than middle and inner.

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Table 6: Average of α-cellulose content of 3(three) numbers of studied bamboo species showing three cross sectional position outer, middle and inner in g/100g.

Position Bambusa garuchokua Bambusa pallida Bambusa assamica Outer 39.52±0.57 44.23±0.61 45.84±2.83 Middle 35.72 ±0.96 36.34±1.78 39.88±0.39 Inner 35.02±0.48 34.31±0.89 38.38±0.59 The data presented in this table are the average values of at least 5 samples per species and per position.

60

50

40 Outer 30 Middle 20 Inner 10

0 B.garuchokua B.pallida B.assamica

Figure 6: Average of α-cellulose content of 3(three) numbers of studied bamboo species showing three cross sectional position outer, middle and inner in g/100g.

IV. CONCLUSIONS

The study of chemical composition of these three numbers of bamboo species growing in Kokrajhar district of BTAD, Assam, India will help to understand the possible utility of these less utilised bamboos. Although the study on this aspect of certain regular used bamboo have been done by several worker, but such study on present selected bamboo species have not been done before in Kokrajhar district. The result of present study may be the solution of most important question regarding criteria for bamboo utility. The findings of this study may be the key for recommendation of these 3(three) studied bamboo species for different application.

Reference [28] made a statement on 7(seven) numbers of Indian bamboo for category wise application, based on physico-chemical and mechanical properties. He recommended B. tulda, B.nutans, G. macrostachya for various structural uses based on higher strength .The results of many important content and qualities of the present studied species can compare with the species mention by him hence the present selected species may be used for structural uses.

Beside the present analysis and statement, the result of this study on 3(three) numbers of bamboo species of Kokrajhar district of Assam, India may be useful for different user groups including structural experts for further analysis.

ACKNOWLEDGEMENT

We would like to thank Dr. Sandeep Das, HOD, Biotechnology, Bodoland University for providing facilities in support for the work. Thanks are expressed to Dr. R.N. Shinha Principal Science College, Kokrajhar for allowing me to carry out some part of the experiment at laboratory of Science College, Kokrjhar. Thanks to SAIF-NEHU, Shillong , for kind help during laboratory work. Thanks to Miss Jayeeta Brahma, research scholar, Department of Botany, NEHU, Shillong for kind help during laboratory work.

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