Journal of Nepal Chemical Society最新文献_第6页

Chemical Constituents of the Essential Oil of Invasive Chromolaena odorata leaves in Central Nepal 尼泊尔中部入侵的臭虫叶精油的化学成分

Journal of Nepal Chemical Society Pub Date : 2021-03-02 DOI: 10.3126/JNCS.V42I1.35364

L. Thapa, Seeta Pathak, K. B. Pal, Tayer Mohamad Miya, Tej Bahadur Darji, G. Pant, R. Pant

{"title":"Chemical Constituents of the Essential Oil of Invasive Chromolaena odorata leaves in Central Nepal","authors":"L. Thapa, Seeta Pathak, K. B. Pal, Tayer Mohamad Miya, Tej Bahadur Darji, G. Pant, R. Pant","doi":"10.3126/JNCS.V42I1.35364","DOIUrl":"https://doi.org/10.3126/JNCS.V42I1.35364","url":null,"abstract":"Chromolaena odorata is one of the widely distributed invasive alien plants in the tropical to subtropical regions of Nepal. It has the ability to impact native species in its invaded range by multiple modes such as allelopathy including volatilization. This study aims to identify volatile chemical components in the essential oil of C. odorata. The leaf samples of C. odorata were collected from the Radha Krishna Community Forest, Chitwan district of Nepal. The essential oil from the leaves was extracted and the chemical composition of the oil was analyzed by gas chromatography (GC) and GC–mass spectrometry (GC–MS). A total of 19 chemical components from the oil were identified. The major components were linalool (21.64%); β-pinene (9.43%); 1,3-cycloheptadiene (8.92%); β-cubebene (7%); cinnamaldehyde (5.30%) and caryophyllene oxide (4.94%). To the best of our knowledge, the presence of o-methoxy cinnamaldehyde and isoeugenyl acetate was not listed as the chemical constituents in volatile oils of C. odorata previously. The components of the volatile oil are suspected to have an allelopathic effect on native species, anti-herbivory properties, and medicinal values. Therefore, this study could be important to understand plant invasiveness and utilization of the plant for the extraction of bioactive compounds that could contribute to control and manage the invasive plants in the invaded areas.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"266 1","pages":"132-137"},"PeriodicalIF":0.0,"publicationDate":"2021-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77949040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Phytochemical Screening and In Vitro Antioxidant and Anti-inflammatory Activities of Aerial Parts of Euphorbia hirta L. 大戟地上部植物化学筛选及体外抗氧化抗炎活性研究。

Journal of Nepal Chemical Society Pub Date : 2021-03-02 DOI: 10.3126/JNCS.V42I1.35362

Deepak Basyal, A. Neupane, D. Pandey, S. Pandeya

{"title":"Phytochemical Screening and In Vitro Antioxidant and Anti-inflammatory Activities of Aerial Parts of Euphorbia hirta L.","authors":"Deepak Basyal, A. Neupane, D. Pandey, S. Pandeya","doi":"10.3126/JNCS.V42I1.35362","DOIUrl":"https://doi.org/10.3126/JNCS.V42I1.35362","url":null,"abstract":"Euphorbia hirta L (Euphorbiaceae) also called asthma herb has long been prescribed in traditional medicine because it exhibits diverse pharmacological actions due to the presence of alkaloids, flavonoids, polyphenols, triterpenoids, and saponins. The present study is aimed at the study of phytochemical and antioxidant activity and anti-inflammatory screening of E. hirta. Extraction of dried powder was performed followed by phytochemical screening using color reactions. Total phenolic content (TPC) and total flavonoid content (TFC) of the extracts were estimated by Folin-Ciocalteu and Aluminum chloride method respectively. The antioxidant activity was studied by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging method. Anti-inflammatory activity was studied by using protein denaturation in vitro bioassay. Phytochemical screening showed the presence of flavonoids, alkaloids, and phenolic compounds. TPC, TFC and antioxidant activity (IC50) of the extract were found as 288.10 mg gallic acid equivalent per gram (GAE/g), 29.36 mg quercetin equivalent per gram (QE/g) and 32.23 μg/mL (p<0.05) respectively. Diclofenac sodium and E. hirta extract showed the maximum inhibition of 91.28% and 68.20% respectively at the concentration of 1000 μg/mL compared with control (p>0.05). The phenolic compounds and flavonoids exert antioxidant and anti-inflammatory activities because of their scavenging ability. The demonstrated antioxidant and anti-inflammatory activities may be the rationale behind some of its folkloric uses and also may be responsible for some of its pharmacological effects. Thus, E. hirta can be considered a good source of antioxidants and anti-inflammatory actions, which might be beneficial for combating oxidative stress.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"7 1","pages":"115-124"},"PeriodicalIF":0.0,"publicationDate":"2021-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72726350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Utilization of Charred Water Hyacinth (Jalkumvi) as Biosorbent for Removal of Ca(II) Ion from Aqueous Solution 焦化水葫芦作为生物吸附剂去除水溶液中Ca(II)离子的研究

Journal of Nepal Chemical Society Pub Date : 2021-03-02 DOI: 10.3126/JNCS.V42I1.35360

Arun Bhujel, K. Wagle, B. Regmi, Bibek Sapkota, B. R. Poudel, S. K. Gautam

{"title":"Utilization of Charred Water Hyacinth (Jalkumvi) as Biosorbent for Removal of Ca(II) Ion from Aqueous Solution","authors":"Arun Bhujel, K. Wagle, B. Regmi, Bibek Sapkota, B. R. Poudel, S. K. Gautam","doi":"10.3126/JNCS.V42I1.35360","DOIUrl":"https://doi.org/10.3126/JNCS.V42I1.35360","url":null,"abstract":"A promising adsorbent, charred water hyacinth (CWH) for the removal of Ca(II) from the aqueous solution was explored by heat treatment of water hyacinth followed by chemical activation with acidified zinc chloride (ZnCl2). The adsorbent was characterized using scanning electron microscopy (SEM) and electron dispersive X-ray (EDX) spectroscopy. Batch adsorption techniques were conducted for Ca(II) adsorption to assess the adsorption isotherm, effect of pH, contact time, initial Ca(II) concentration, adsorbent doses, and adsorption kinetics. The SEM micrograph illustrates the rough and irregular surface morphology and EDX spectra confirm the successful adsorption of Ca(II) on the adsorbent surface. The equilibrium adsorption data better fitted to the Freundlich isotherm model having a maximum adsorption capacity (qmax) of 319.75 mg/g. The highest percentage of adsorption was found at pH 1.5. The adsorption of Ca(II) by CWH decreased at the higher metal concentration and lower adsorbent doses. The adsorption of Ca(II) ions onto CWH followed the pseudosecond-order kinetics model. Overall, these results suggested that the as-prepared CWH can be used as an ecofriendly, economical and efficient alternative for the removal of Ca(II) from the aqueous solution.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"16 1","pages":"107-114"},"PeriodicalIF":0.0,"publicationDate":"2021-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86499731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Silver(I) Ion Removal Efficiency of Activated Carbon Prepared from Terminalia-bellerica (Barro) Seed Stone 菝葜籽石活性炭对银(I)离子的去除效果

Journal of Nepal Chemical Society Pub Date : 2021-03-01 DOI: 10.3126/JNCS.V42I1.35340

M. Adhikari, Sandeep Sharma Lamsal

{"title":"Silver(I) Ion Removal Efficiency of Activated Carbon Prepared from Terminalia-bellerica (Barro) Seed Stone","authors":"M. Adhikari, Sandeep Sharma Lamsal","doi":"10.3126/JNCS.V42I1.35340","DOIUrl":"https://doi.org/10.3126/JNCS.V42I1.35340","url":null,"abstract":"Phosphoric acid-activated Terminalia-bellerica (Barro) seed stone powder was carbonized in a muffle furnace at three different temperatures (300, 400, and 500oC). The activated carbons (BAC-300, BAC-400, and BAC-500) were characterized by using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), methylene blue number, and iodine number. The iodine number (357 mg/g) and specific surface area (537 m2/g) were a maximum for BAC-400. The BACs followed Langmuir adsorption isotherm and the maximum methylene blue adsorption capacity was 212.77 mg/g. The silver ion removal efficiency was a maximum at pH 6, 3 mg/L of adsorbent dose, and 20 mg/L of silver ion concentration. The BAC-400 could adsorb 40 % of silver ion within 5 mins with the initial Ag(I) ion concentration of 20 mg/L and an adsorbent dose of 1 mg/L. The percentage of adsorption enhanced to 100% with the increment of adsorbent dose to 3 g/L.The adsorption kinetics of silver (I) ion on BAC-400 was well fitted to pseudo-second-order kinetics suggesting the chemisorption of silver ions. All the results attributed that low-cost viable adsorbent can be prepared from Barro seed stone for the efficient removal of silver ion from aqueous solution.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"24 1","pages":"89-98"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89145472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Spectrophotometric Quantification of Iron in Different Pharmaceuticals 分光光度法测定不同药物中铁的含量

Journal of Nepal Chemical Society Pub Date : 2021-03-01 DOI: 10.3126/JNCS.V42I1.35329

K. Parajuli, K. Sharma, N. Bhattarai, G. G.C.

引用次数: 0

Synthesis, Characterization and Antimicrobial Evaluation of Mannich Bases of 4-(Furan-2-yl-methyleneamino)-3-(2-hydroxyphenyl)-1H-1,2,4-triazole-5-thione 4-(呋喃-2-酰基亚氨基)-3-(2-羟基苯基)- 1h -1,2,4-三唑-5-硫酮曼尼希碱的合成、表征及抗菌评价

Journal of Nepal Chemical Society Pub Date : 2021-03-01 DOI: 10.3126/JNCS.V42I1.35322

Prem Shankar Deo, R. Rawat, B. Shakya

引用次数: 0

Genesis Exploration of White Clays Deposited in Thimi Area of Kathmandu Valley 加德满都谷地Thimi地区白粘土成因勘探

Journal of Nepal Chemical Society Pub Date : 2021-03-01 DOI: 10.3126/JNCS.V42I1.35338

M. Dhakal, N. Duwal, Narendra M. Adhikari, S. Joshi, J. Bhattarai

{"title":"Genesis Exploration of White Clays Deposited in Thimi Area of Kathmandu Valley","authors":"M. Dhakal, N. Duwal, Narendra M. Adhikari, S. Joshi, J. Bhattarai","doi":"10.3126/JNCS.V42I1.35338","DOIUrl":"https://doi.org/10.3126/JNCS.V42I1.35338","url":null,"abstract":"The geological genesis of the Thimi-Sanothimi white clay deposits of Kathmandu Valley was explored employing mineralogical and chemical analyses in this research. For the study, two sample specimens of the clay having two types of particle size, i.e., about < 63 μm (bulk) and < 2 μm (fine), were separated with the help of standard sieve mesh which further modified using high-temperature heat, and 1 M HCl and 1 M KCl solution treatments. For the most part, both the clay fractions constituted of 2:1 type of vermiculite and mica (mainly of K-mica type) clay minerals with different feldspars and quartz phases as clay admixtures from the results of the mineralogical phase analysis. The chemical constituents of the clay particles with < 63 μm, < 2 μm, and the HCl-treated sample specimens confirmed the existence of a high quantity of SiO2 with comparatively low Al2O3 which indicates the presence of fewer amounts of the vermiculite and mica minerals comparatively with feldspars and quart admixtures in the analyzed white clay samples. Moreover, the clay sample contained a considerable quantity of Fe2O3 and MgO chemicals which are not favorable raw material constituents for good quality porcelains and white-wares products without refining and chemical-modifications. The present work could be the first step to explore its potentiality in various industrial sectors like table-ware, sanitary-ware, brick and tile ceramics, paper and pulp, petrochemical, pharmaceutical including environmental pollution controlling agents in Nepal.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"4 1","pages":"80-88"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87281605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Green Synthesis of Zirconia (ZrO2) Nanoparticles using Curcuma Longa Extract and Investigation of Compressive Strength of Epoxy resin (EP)/ZrO2 Nanocomposites 姜黄提取物绿色合成纳米氧化锆(ZrO2)及环氧树脂/ZrO2纳米复合材料抗压强度研究

Journal of Nepal Chemical Society Pub Date : 2021-03-01 DOI: 10.3126/JNCS.V42I1.35328

Manish Bishwokarma, Arun Bhujel, M. Baskota, R. Pandit

{"title":"Green Synthesis of Zirconia (ZrO2) Nanoparticles using Curcuma Longa Extract and Investigation of Compressive Strength of Epoxy resin (EP)/ZrO2 Nanocomposites","authors":"Manish Bishwokarma, Arun Bhujel, M. Baskota, R. Pandit","doi":"10.3126/JNCS.V42I1.35328","DOIUrl":"https://doi.org/10.3126/JNCS.V42I1.35328","url":null,"abstract":"Zirconia (ZrO2) nanoparticles are polymorphic materials having a wide range of applications. It can be synthesized via green as well as chemical synthesis methods. In this work, ZrO2 nanoparticles were synthesized by the green method using Curcuma longa extract. Curcuma longa extract was prepared using the standard method. The synthesized ZrO2 was characterized by the X-ray diffraction (XRD) analysis and Fourier transform infrared (FTIR) spectroscopy for their structural and size analysis. The analysis of the XRD pattern of ZrO2 showed the tetragonal phase structure and the size was calculated using the Debye Scherrer equation which was about 35 nm. The FTIR spectra analysis showed a broad absorption peak particularly at about 774 cm-1 and about 499 cm-1 correspondings to Zr-O2-Zr asymmetric and Zr-O stretching modes, respectively. The characterized ZrO2 nanoparticles were used for the preparation of epoxy resin/ZrO2 nanocomposites. The compressive strength of pure epoxy resin and epoxy resin/ZrO2 nanocomposites were measured by a compressive strength tester and the result indicates the high amount of zirconia showed the less compressive strength in nanocomposites.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"1 1","pages":"45-50"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77378695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Non-carcinogenic and Carcinogenic Risk Assessment of Heavy Metals Exposure to Indoor Dust in Kathmandu, Nepal 尼泊尔加德满都室内粉尘中重金属暴露的非致癌和致癌风险评估

Journal of Nepal Chemical Society Pub Date : 2021-03-01 DOI: 10.3126/JNCS.V42I1.35324

Sulakshya Bhandari, Sudarshana Shakya, B. Adhikari, M. Shrestha, Bindra Devi Shakya, Achut Ram Pradhananga, Prem Kumar Shrestha, R. Shakya, D. R. Pant, P. Shakya

{"title":"Non-carcinogenic and Carcinogenic Risk Assessment of Heavy Metals Exposure to Indoor Dust in Kathmandu, Nepal","authors":"Sulakshya Bhandari, Sudarshana Shakya, B. Adhikari, M. Shrestha, Bindra Devi Shakya, Achut Ram Pradhananga, Prem Kumar Shrestha, R. Shakya, D. R. Pant, P. Shakya","doi":"10.3126/JNCS.V42I1.35324","DOIUrl":"https://doi.org/10.3126/JNCS.V42I1.35324","url":null,"abstract":"The present study was carried out to assess the contamination of heavy metals in indoor household dust of Kathmandu, Nepal, and its adverse effect on the indoor environment and human health. The concentrations of four heavy metals (Cd, Cr, Ni, and Pb) in a total of ninety-three (N = 93) indoor dust samples collected from four different types of land use zones viz., commercial, heavy traffic, residential, and control (undisturbed) of Kathmandu were determined by the flame atomic absorption spectrophotometer (FAAS). The mean concentrations of Cd, Cr, Ni, and Pb in indoor dust samples over the study zones were 0.89, 158.1, 113.3, and 65.3 mg/kg, respectively. The land use zones showed the various degree of metal contamination in indoor dust ranging from moderate to considerable level. PLI showed a high pollution load in the monitored locations, indicating an alarming condition and the urgent need for immediate remedial actions. Hazard quotient (HQ) values indicated ingestion as the major pathway of indoor dust heavy metal exposure to children while the inhalation pathway remained dominant in adults. Hazard index (HI) values showed no probable noncarcinogenic risk of the heavy metals present in the indoor dust of Kathmandu. For carcinogenic health risk, TLCR values were found within the acceptable safe limit indicating no cancer risk for both the receptor groups.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"1 1","pages":"16-28"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88780156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Facile Synthesis of Nanosized Magnesium-Aluminium Layered Double Hydroxides 纳米镁铝层状双氢氧化物的简易合成

Journal of Nepal Chemical Society Pub Date : 2021-03-01 DOI: 10.3126/JNCS.V42I1.35327

K. Dhakal, Girja Mani Aryal, H. S. Adhikari, R. Adhikari

引用次数: 1