NOPR Collection:

Physical Stability and Bio-Efficacy Enhancement of Neem Kernel Aqueous Extract by Optimized Amount of Botanical Synergist for the Control of Early Stages of Mosquitoes

2021-04-01T00:00:00Z

Title: Physical Stability and Bio-Efficacy Enhancement of Neem Kernel Aqueous Extract by Optimized Amount of Botanical Synergist for the Control of Early Stages of Mosquitoes Authors: Iqbal, Nusrat; Dubey, Saurabh; Kumar, Natish; Agrawal, Amrish; Kumar, Jitender Abstract: The aim of present study is to enhance the stability of physico-chemical characteristics of neem kernel aqueous extract by botanical stabilizer system. There are variety of bioactive constituents are present in neem which give broad-spectrum of insecticidal activity. Neem aqueous extract is commonly used and found very effective in pest control applications without harming the environment. However, due to hydrolytically unstable characteristics of neem active ingredients which results its lesser bioactivity and limits its usage in aqueous form. To overcome this un-stability issue oil extracted botanical stabilizer (Prosopis juliflora) (Junglee kikar)) were used in various ratios. In 70-30 (NKP-KP) composition (NKP- Neem kernel powder; KP- Kiker powder), neem aqueous extract was found stable without any turbidity, pH change, and fungal growth. Active ingredient, Azadirachtin was found stable with very less degradation i.e only 20–30% degradation. This may possibly be due to inhibition of hydrolytic reactions. Bio-efficacy evaluation data also showed improved and stable mosquito larvae mortality per cent i.e 75–90% with 8 µg/g LD₅₀ value. The approach used in this study could be very useful in long term stability of neem kernel extract in various geographical conditions without adding toxic solvents or chemical compositions. Page(s): 297-303

Application of Multi Criteria Decision Making tools in Selection of Concrete Mix

2021-04-01T00:00:00Z

Title: Application of Multi Criteria Decision Making tools in Selection of Concrete Mix Authors: Khan, Uzair; Verma, Rajat; Singh, Binod Kumar; Yadav, Vikash Abstract: Now a day decision making plays a major role in deciding the execution of any task. Two key tools are available to serve the purpose of decision-making. These include AHP as well as TOPSIS, both falls under Multi Criteria Decision Making (MCDM) tools. These techniques are now also brought in the field of civil engineering. MCDM techniques are used in various applications of civil engineering. This paper presents comparison of AHP and TOPSIS for making final decisions for the best concrete mix with fibres of steel and basalt available with different proportions. The comparison is made on the tests of split tensile strength, compressive strength and flexure results. Results of the experiment are used to validate results of AHP and TOPSIS. Optimum hybrid mixes for mechanical properties is M-S0.5-B0 at 28 days. Page(s): 304-309

Experimental Investigation of the Effect of Fluid-Solid Mixture Flow by Pneumatic System in Textile Industry

2021-04-01T00:00:00Z

Title: Experimental Investigation of the Effect of Fluid-Solid Mixture Flow by Pneumatic System in Textile Industry Authors: Kalamegam, Millerjothi; Haimanot, Redae; Udayakumar; Kandan, Parthiban Abstract: The transport of multiphase flows of slurry (fluid-solid) through pipelines is usually encountered through several hurdles in various industries such as cement, textile and chemical industries. The flow parameters such as solids concentration, pipe directions and so on, add to these complexities and concepts associated with transport of slurries seems to be uncertain which has resulted in significant research being conducted on flow of slurries through pipelines. The investigation has been carried out in Textile and garment factory at Ethiopia in eastern Africa. The objective of the investigation is to study the effects of transporting of fluid-solid mixture (air-cotton ball) through horizontal, vertical and inclined pipelines in a textile factory. For this purpose one generalized mathematical model developed by Shrivastava and Kar (SK Model) was applied to predict more accurate results of pressure drop. The results of pressure drop obtained using SK model were compared with experimental results. The results showed that the percentage of head losses is increased in the smaller diameter pipe line about 48% and 67% with air velocity 12 m/s and 24 m/s respectively as compared to that of larger diameter pipeline. In the proposed pipeline system, it was observed that the energy saving can be achieved about 65% and 77% with air velocity 12 m/s and 24 m/s respectively. Page(s): 310-314

Molecular Diversity Assessment in Selected Accessions of White Seeded Sesame (Sesamum indicum L.) using SSR Markers

2021-04-01T00:00:00Z

Title: Molecular Diversity Assessment in Selected Accessions of White Seeded Sesame (Sesamum indicum L.) using SSR Markers Authors: Yogranjan; Satpute, G K; Bal, Lalit M; Srivastava, A K; Mishra, Sudhakar P Abstract: Fifty sesame accessions with 10 simple sequence repeat (SSR) markers were used for their molecular characterization and assessment of genetic diversity. It was observed through this study that the accessions have enough genetic variability at molecular levels. Thirty five alleles with mean polymorphism information content of 0.42 resulted from the molecular studies very explicitly indicate the superiority of SSR primers in assessment of genetic diversity. These primer bands size varied from 200 to 400 bp. The number of alleles per locus in selected accessions varied from 3 to 6 and heterozygosity per primer ranged from 0.00 to 0.40. The pair wise genetic similarity varied from 0.44 to 0.86. A closure view of dendrogram identified two major clusters, indicating high genetic resemblance among sesame accessions. Hence, under the study here, diversity assessment through SSR markers was proved to be stronger tools for discriminating Sesamum indicum accessions. Page(s): 315-321