Associate Professor, Mualpui Bethel, ITI, Aizawl http://pucir.inflibnet.ac.in:8080/jspui/handle/123456789/177 2025-10-30T07:00:51Z 2025-10-30T07:00:51Z Lalhriatpuia, C http://pucir.inflibnet.ac.in:8080/jspui/handle/123456789/966 2025-10-16T08:40:44Z 2023-10-16T00:00:00Z

Title: Synthesis of D-Fructose-Based Bifunctional Primary Amine-Thiourea Organocatalysts and Their Applications in Asymmetric Reactions Authors: Lalhriatpuia, C Abstract: The preparation of a new class of six bifunctional thiourea organocatalysts having a Dfructose scaffold and a primary amino group was demonstrated. In the present study, the novel organocatalysts exhibited excellent enantio- and moderate diastereoselectivities in the asymmetric Michael addition of aliphatic ketones and 1,3-diketone to substituted nitroolefins at room temperature. In addition, the direct asymmetric aldol reaction between cyclic aliphatic ketone and aromatic aldehydes was also studied in the presence of the saccharide-thiourea organocatalysts giving excellent yield with moderate enantioselectivity.

2023-10-16T00:00:00Z Lalhriatpuia, C http://pucir.inflibnet.ac.in:8080/jspui/handle/123456789/964 2025-10-16T08:36:39Z 2016-03-14T00:00:00Z

Title: Efficient removal of 17β-estradiol using hybrid clay materials: Batch and column studies Authors: Lalhriatpuia, C Abstract: Hybrid materials were obtained modifying the bentonite (BC) and local clay (LC) using hexadecyltrimethylammonium bromide (HDTMA) or the clay were pillared with aluminum followed by modification with HDTMA. The materials were characterized by the SEM, FT-IR and XRD analytical tools. The batch reactor data implied that the uptake of 17β-estradiol (E2) by the hybrid materials showed very high uptake at the neutral pH region. However, at higher and lower pH conditions, slightly less uptake of E2 was occurred. The uptake of E2 was insignificantly affected changing the sorptive concentration from 1.0 to 10.0 mg/L and the background electrolyte (NaCl) concentrations from 0.0001 to 0.1 mol/L. Moreover, the sorption of E2 by these hybrid materials was fairly efficient since within 30 mins of contact time, an apparent equilibrium between solid and solution was achieved, and the data was best fitted to the PSO (pseudo-second order) and FL-PSO (Fractal-like-pseudo second order) kinetic models compared to the PFO (pseudo-first order) model. The fixed-bed column results showed that relatively high breakthrough volume was obtained for the attenuation of E2 using these hybrid materials, and the loading capacity of E2 was estimated to be 75.984, 63.757, 58.965 and 49.746 mg/g for the solids BCH, BCAH, LCH and LCAH, respectively.

2016-03-14T00:00:00Z Lalhriatpuia, C http://pucir.inflibnet.ac.in:8080/jspui/handle/123456789/962 2025-10-16T08:33:42Z 2021-04-23T00:00:00Z

Title: Edible Coatings in Extending the Shelf Life of Fruits: A Review Authors: Lalhriatpuia, C Abstract: Post-harvest losses of fruits are a matter of concern for all those nations whose economy is based on horticulture. Fruits face tremendous loss due to old-fashioned preservation practice and ignorance about the preservation strategies. Consumers around the world demand for food of high-quality, without chemical preservatives and an extended shelf life. New technological advances in edible coatings for food may hold promise in extending shelf life, reducing packaging layers, meeting food safety and quality requirements. Among various coatings, edible coatings have been proven one of the best biologically safe preservative coatings for different types of foods because of its film-forming properties, antimicrobial actions, bio degradability and biochemical properties. It acts as a natural barrier to moisture and oxygen, which are the main agents of deterioration of fruits and vegetables. Edible coatings have the ability to prolong shelf life of the fruits by minimizing the rate of respiration and maintaining quality attributes. It has antifungal and antibacterial properties which provide a defensive barrier against microbial contamination. The present review describes about the different edible coatings and their potential application for enhancing the postharvest life and quality of different types of fruits.

2021-04-23T00:00:00Z Lalhriatpuia, C http://pucir.inflibnet.ac.in:8080/jspui/handle/123456789/959 2025-10-16T08:19:56Z 2021-09-02T00:00:00Z

Title: Noble Metal Doped TiO2 Thin Films In The Efficient Removal of Mordant Orange-1: Insights of Degradation Process Authors: Lalhriatpuia, C Abstract: Nanocomposite Ag0(NPs)/TiO2 is synthesized in a facile template method enabling fine particles of reduced Ag evenly distributed within the titania network. The morphological studies of nanocomposite were extensively performed employing SEM/EDX (Scanning Electron Spectroscopy/Energy Dispersive Xray), TEM (Transmission Electron Microscopy) and AFM (Atomic Force Microscopy). The newer insights in the photocatalytic elimination of Mordant Orange-1 (MO1) was obtained using the nanocomposite thin film for various parametric studies utilizing the UV-A and LED illuminations. The kinetics of degradation of MO1 was performed and the rate constant was favoured at lower concentrations of MO1. However, the elimination efficiency of MO1 was favoured with decrease in solution pH. The NPOC results inferred that fairly good extent of MO1 was mineralized using thin film catalyst for both the UV-A and LED illuminations. The minimal effect of several co-ions demonstrated applicability of thin films in the elimination of MO1 and the stability of the thin film has shown the potential applicability of thin film catalyst. Further, mechanism of photocatalytic degradation was demonstrated with the radical scavengers studies and ascertained the reaction pathways.

2021-09-02T00:00:00Z