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Textile dyes are hazardous and carcinogenic materials. Hence, their removal from wastewater is globally required. This research aims to remove anionic dye red bemacid E-TL from aqueous solutions using a biofilm supported on granular pozzolana in a fixed-bed column. The effect of different experimental conditions such as influent dye concentrations, flow rate and bed depth on red bemacid biosorption at room temperature were investigated. Results indicated that the breakthrough and saturation time increase with the decrease of the flow rate. The same effect is shown when the bed depth is increase..read more
Cherifi Souad, Djafer Abderrahmane, Mehdaoui Razika, Sameut Bouhaik Izzeddine, Fizir Meriem and Iddou Abdelkader
- 05 May 2023
- Volume Detail: VOLUME 45, NO2, APR-2023
- Pages: 72
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Walnut, Almond and Apricot stone shells are abundantly available agro wastes worldwide and are sources of cellulose. In this study microcrystalline cellulose were isolated from these renewable biomasses through acid hydrolysis method. Isolation of microcrystalline was performed due to its potential significance in cosmetics, medicine and food industries. Acid hydrolysis is carried out at different concentrations of sulphuric acid. Surface morphology and elemental composition of microcrystalline cellulose was characterized with Scanning electron microscopy, energy dispersive x-ray spectroscopy ..read more
Shaista Nazir, Usama Habib and Tehzeeb Ul Islam
- 05 May 2023
- Volume Detail: VOLUME 45, NO2, APR-2023
- Pages: 85
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Mass production of Epichlorohydrin (ECH) via epoxidizing allyl chloride suffers from determining the optimal reaction parameters and reproducibility. Titanium silicalite-1 (TS-1) catalyst has been successfully employed to reduce activation energy, but many reaction conditions are involved in the process. To optimize ECH production by analysing its yields, Taguchi method was implemented for reducing time and cost. Included in the reaction parameters were reaction temperature, reaction time and the reactant ratio. This study investigated preparation of heterogeneous catalysts using hydrothermal ..read more
Rui Pan, Rumeng Jiang, Yao Chen and Jiancheng Zhou
- 05 May 2023
- Volume Detail: VOLUME 45, NO2, APR-2023
- Pages: 93
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Menthol is one of the key components of mint oil and it is a chemical component that is widely used in many sectors such as cosmetics, medicine, and food. Menthol can be made by synthesis or by various extraction and distillation methods. In this study, first, mint oil was obtained by microwave extraction and hydrodistillation from the mint that is an agricultural and industrial product cultivated in a wide geography in Turkey. Later, qualitative and quantitative analysis of this oil was executed and the differences in the chemical contents of the oils manufactured by different methods and t..read more
Cenk Subutay, Özge Karavil, İ. Metin Hasdemir, Belma Hasdemir and Dilek Özmen
- 05 May 2023
- Volume Detail: VOLUME 45, NO2, APR-2023
- Pages: 103
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Despite the interesting structure of the generic thiacalix[4]arene containing four coordinating sulfur atoms bridging four phenolic units, there are only a few reported examples of thiacalixarene-based coordination complexes that are used as electrocatalysts. Herein, we report electrocatalytic hydrogen evolution reaction (HER) by a thiacalix[4]arene-based copper(II) complex (1). As expected, two reduction waves were appeared (-0.48 V and -1.30 V vs Ag/AgCl) for Cu2+/Cu+ and Cu+/Cu reduction couples. The HER by proton reduction occurs at -1.03 V with a shift of 0.27 V compared to the second pea..read more
Hani El Moll, Khalaf M. Alenezi, Abdallah O. Alshammari, Ashanul Haque, Jamal Humaidi
Raoudha Soury, Eid M. S. Azzam, Fahad Abdulaziz, Salman Latif, Milan Vraneš
- 05 May 2023
- Volume Detail: VOLUME 45, NO2, APR-2023
- Pages: 113
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The results of the investigation of the thermomechanical characteristics of maleinized polyolefine-based nanocomposite materials with different carbon black content are presented. The high density polyethylene, low density polyethylene and polypropylene were used as polyolefins. Highly structured amorphous carbon black of the Printex XE 2B brand with a nanoparticle size of 20 nm, introduced into the composition of the polyolefin in an amount of 1.0–20 wt%, was used as technical carbon. To improve the compatibility of polyolefins with technical carbon, a compatibilizer was used – high-density p..read more
Najaf Kakhramanov, Khayala Allakhverdiyeva, Qalina Martynova, Fatima Mustafayeva,
Yunis Kahramanli, Nazim Sadikhov, Azer Amirov
- 05 May 2023
- Volume Detail: VOLUME 45, NO2, APR-2023
- Pages: 119
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Proteases are theprotein degrading commercial enzymes with considerable importance for many industrial applications such as paper, leather, food industries as well as used in detergent formulation, toxic waste removal, pharmaceutical and drilling for oil. The focus of the current study was to isolate the novel protease producing bacterial sp. from environment, to optimize the submerged fermentation parameters in order to design the best supportive media for maximum enzyme yield and to purify the enzyme to increase its utilization in various industries, most importantly the pharmaceutical indus..read more
Aliya Riaz, Isma Idrees, Sana Ahmad, Ayesha Siddiquiand Shah Ali Ul Qader
- 05 May 2023
- Volume Detail: VOLUME 45, NO2, APR-2023
- Pages: 128
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A new type of β-cyclodextrin-modified hyperbranched carbosilane (β-CD@HBC) stationary phase was synthesized by combining hyperbranched carbosilane with the -OH group of β-cyclodextrin, and then the β-CD@HBC was used as astationary phase to fix it on the inner wall of capillary column, application in chiral drug separation. The chromatographic behaviour of the stationary phase was studied. The preliminary test results showed that the β-CD@HBC coated OT column has the ability to separate a variety of enantiomers, such as clenbuterol, ibuprofen, enrofloxacin, hlorpheniramine, isoproterenol hydroc..read more
Xiangqing Yang and Yali Hang
- 05 May 2023
- Volume Detail: VOLUME 45, NO2, APR-2023
- Pages: 136
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Sulfide linkage plays an important role not only in synthetic chemistry but also has vast applications in drug discovery as a pharmacologically active moiety. Transition metal-catalyzed thiolation is a challenging task as sulfur has a high affinity to bind with transition metal catalysts resulting in catalyst poisoning. Catalyst poisoning results in the inhibition of the reactivity and utility of the reactions. In the current work, a simple and facile method is developed to carry out S-arylation using hetero-aryl thiols and substituted aryl iodides. The reaction conditions were optimized using..read more
Hassan Adrees, Zahra Begum, Haseen Ahmad, Rifhat Bibi, Sania Batool and Abbas Hassan
- 05 May 2023
- Volume Detail: VOLUME 45, NO2, APR-2023
- Pages: 151
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In this study, bioactive properties and GC-MS analyses of the Camellia sinensis (seed, leaf, and blossom parts) and commercial black tea extracts were compared. The total phenolic content (TPC) and antioxidant and antimicrobial activities of extracts were determined. The gas Chromatography-Mass Spectrometry (GC-MS) technique was used to identify the major bioactive compounds in extracts. The TPC and antioxidant activity values of the alcohol extract prepared from the leaf part of the C. sinensis are higher than the other extracts. There was a strong correlation between total phenolic content a..read more
Ömer ERTÜRK, Elif ÇİL, Melek ÇOL AYVAZ and Emine BAĞDATLI
- 05 May 2023
- Volume Detail: VOLUME 45, NO2, APR-2023
- Pages: 161
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