Effect of Plant Growth Regulators on Leaf Biochemical Characters and Fruit Yield Components of Bittergourd (Momordica charantia L.) Cvs. MHBI-15 and Chaman Plus

Effect of plant growth regulators on leaf biochemical parameters (chlorophyll pigments, sugars, nitrate reductase activity, total phenols) and fruit yield bitter gourd (Momordica charantia L.) was studied. The experiment consisted of foliar treatment with three plant growth regulators, GA3 (20, 40 and 60ppm), NAA (50ppm) and CCC (100 and 200ppm) in two bittergourd varieties, MHBI-15 and Chaman Plus at 45 days after sowing (DAS). Results revealed significant difference between treatments on chlorophyll, sugar, total phenol content as also on nitrate reductase activity. Foliar application of CCC (200ppm) recorded maximum amount of total sugars (18.03% over Control), total phenol content (10.93%) as also nitrate reductase activity (16.12%). Among the treatments, application of GA3 (20ppm) recorded maximum chlorophyll content (18.03% over Control). Highest increase in mean fruit yield over Control was recorded with application of GA3 (20ppm) (39.88%), followed by CCC (200ppm) (34.15%) in both the cultivars

Gas Chromatographic-Mass Spectrometric Detection of Pesticide Residues in Grapes

GC-MS/MS method has been developed and validated for the determination and quantification of 35 multi-class pesticide residues in grape samples. Pesticides are selected from different families including organochlorines, organophosphorus, carbamates, pyrethroids, triazines, triazoles, pyrazoles, etc. The QuEChERS-dSPE (dispersive solid-phase extraction) method was used for the extraction of residues of pesticide. An extra cleanup step was included with the help of a primary secondary amine (PSA) and graphitized carbon black (GCB). Recoveries ranged from 70 to 100% with 14% relative standard deviation (RSD). Other parameters such as precision, recoveries, limit of detection (LOD), limit of quantification (LOQ), and linearity were also studied. Finally, the proposed analytical method was successfully employed for the determination of residues of pesticide in grape samples

Analysis of Pesticide Residues in Chili (Capsicum annuum L.) using Ultra Performance Liquid Chromatography with UV Detection

The aim of this study was to analyze the pesticide residues in chili samples, collected from farmer’s field. Ultra performance liquid chromatography (UPLC) with BEH C18 column was used for this analysis work. A cheap and fast method for the simultaneous quantification of 12 residue of pesticides in chili has been developed. Samples were prepared according to Quick, Easy, Cheap, Effective, Rugged, Safe (QuEChERS) method and quantification was performed by using tunable ultra violet (TUV) detector. The method was applied for the analysis of the chili samples and results showed that most of the samples have detectable pesticide residues. The residues of acetamiprid and thiodicarb were detected only in three samples, whereas flubendiamide and mancozeb were detected in six samples and arbosulfan and Spinosad were detected in two and five samples, respectively. Out of the 30 chili samples, only 11 samples were found to be contaminated with pesticide residues with more than maximum residue limits (MRLs)

A Simple, reversed-phase Ultra performance liquid chromatographic method for the simultaneous determination of Monocrotophos, Thiram, carbendazim, Carbaryl and imidacloprid pesticides by Quechers method in chilli samples.

A simple, reversed-phase Ultra-performance liquid chromatographic (RP-UPLC) method for the simultaneous determination of five pesticides namely Monocrotophos, Thiram, Carbendazim, Carbaryl and Imidacloprid has been developed. This method involves sample preparation by QueCherS method and quantification by ultra performance liquid chromatography with   tunable dual wavelength detector. The mobile phase composition was varied to improve peak resolution and peak sensitivity. Choosing the match between the stationary phase and mobile phase composition, the developed RP-UPLC method not only can simplify the procedure but also significantly reduce the analysis time. The method presents an average recovery of 87.9% and 96.9%, in repeatability and intermediate precision conditions, respectively, with adequate precision (RSD from 0.8 to 20.7%), for all compounds. The method was applied to determine these pesticide residues in chilli samples

Uso del láser en urgencias por periodontitis apical post tratamiento endodóntico

Introduction: Laser therapy and stimulation of the acupuncture points are anti-inflammatory and analgesic alternative treatments in dentistry.Objective: to describe the use of low power laser therapy in the emergency treatment of apical periodontitis after endodontic treatment during 2018.Methods: observational, descriptive, longitudinal, and prospective study of patients who attended emergency department at Guama Dentistry Clinic during 2018, Pinar del Río, presenting apical periodontitis after endodontic treatment; 86 patients participated in the study. Descriptive statistics was applied, respecting the bioethical principles.Results: female gender predominated (53,49 %), apical periodontitis after endodontic treatment was more prevalent in the age group 20-24 (30,23 %); 65,5 % of the patients presented remission and relief after the third treatment session. Only 2,33 % needed more than six treatment sessions.Conclusions: apical periodontitis after endodontic treatment is more common in women during the first half of the second decade of life. The treatment showed effectiveness from the first treatment sessions.Introducción: la terapia y estimulación con láser en puntos acupunturales constituyen alternativas de tratamiento antiinflamatorio y analgésico en estomatología.Objetivo: describir el uso de la terapia láser de baja potencia en el tratamiento de urgencias por periodontitis apical post tratamiento endodóntico durante el 2018.Método: estudio observacional, descriptivo, longitudinal y prospectivo en pacientes que acudieron a la consulta de urgencias de la Clínica Estomatológica “Guamá’’, municipio Pinar del Río, en el período durante el año 2018, por presentar periodontitis apical post tratamiento endodóntico. El universo estuvo constituido por 86 pacientes trabajándose con la totalidad. Se empleó estadística descriptiva y se siguieron los principios bioéticos.Resultados: predominó el sexo femenino (53,49 %), donde la periodontitis apical post tratamiento endodóntico se presentó en mayor cuantía en el grupo etario de 20 a 24 años de edad (30,23 %). El 65,5 % de los pacientes presentaron remisión y alivio tras la tercera sesión de tratamiento. Solo el 2,33 % necesitó más de seis sesiones de tratamiento.Conclusiones: la periodontitis apical post tratamiento endodóntico se presentan en mayor cuantía en las féminas, durante la primera mitad de la segunda década de vida. El tratamiento con terapia laser de baja frecuencia mostró efectividad desde las primeras sesiones de tratamiento

Numerical study of the influence of tube arrangement on the flow distribution in the header of shell and tube heat exchangers

The behavior of the fluid inside the internal circulation system of a shell and tube heat exchanger is complex due to the influence of many factors. The flow distribution has a significant influence on the performance of fluidic apparatus such as shell and tube heat exchangers. The non-uniformity of the flow distribution reduces the efficiency of the process. The influence of tubes arrangements on the flow distribution is presented using CFD simulations. In this study, four arrangement types are considered. The present results are in good agreement with those of the literature. The obtained results show that the arrangement of the tubes has a significant influence on the flow distribution. It was concluded that the flow distribution of 60° arrangement exhibits better uniformity compared to the conventional arrangement (90°) by 21%. The 45° arrangement gives good uniformity of pressure distribution compared to the other arrangements.SCOPUS: ar.jinfo:eu-repo/semantics/publishe