RESUMEN

A field experiment was conducted at the Research Farm of the ICAR-Indian Institute of Soil Science, Bhopal (India) to study influence of different integrated nutrient management (INM) modules on soil potassium (K) fractions. The experiment comprised with twelve treatments laid out in randomized block design (RBD) with three replications under maize-chickpea cropping sequence. The treatments included general recommended dose (GRD), soil test crop response (STCR) dose; combinations of inorganic and organic inputs and only organic modules. The soil samples were collected at crop harvest and analyzed for various K fractions viz., water soluble-K, available-K, exchangeable-K, HNO3-K, lattice-K and total-K. The results indicated that potassium fractions were significantly (p = 0.05) affected by different treatments. Different INM modules significantly enhanced significantly K availability in soil. Among various INM modules studied, treatment 11 (application of 20 t ha-1 FYM in maize with 5 t ha-1 FYM every year in chickpea) proved most beneficial for improving the soil K fractions. Findings of this type are important for K fertilizer management during crop production in areas with low soil fertility.

Asunto(s)

Cicer , Suelo , Agricultura/métodos , Zea mays , Potasio/análisis , Productos Agrícolas , Fertilizantes/análisis

RESUMEN

Adoption of conservation agriculture (CA) is very slow due to weed infestations. The application of herbicides is the only viable option to deal with problem of weed management to adhere with basic principles of CA. A field experiment was carried out for three years to evaluate the expediency of different herbicides and their sequential applications under CA. In this study, seven treatments comprised of either alone or sequential application of pre-emergence (PE) and post-emergence (PoE) herbicides, hand weeding and weedy check were tested in soybean. Result indicated that sequential application of glyphosate at 1 kg ai ha-1 + pendimethalin at 1 kg ai ha-1as PE followed by PoE application of imazethapyr at 100 g ai ha-1 at 30 days after sowing (DAS) proved to be the best economical option in terms of plant growth parameters, crop biomass, seed yield, weed index and carbon and nutrient recycling. Pearson's correlation coefficients matrix revealed that grain yield was significantly (P<0.0001) related to weed density at harvest (r = -0.84), (WDH) (r = -0.63), weed dry biomass (WDB) (r = -0.52), weed nitrogen (N), phosphorus (P) and potassium (K) uptake (r = -0.56, r = -0.59 and r = -0.66), respectively and weed index (WI) (r = -0.96). The bivariate linear regression study of grain yield on weed control efficiency (WCI) biomass, N, P and K uptake by grain showed a clear significant (P<0.0001) dependence with R2 value of 0.53, 0.99, 0.95 and 0.98, respectively. The fitted stepwise multiple regression model also revealed that N and P uptake in grain, weed density at 20 DAS and K uptake in weed were actual predictor for grain yield. We concluded that, effective and economical weed control under CA in soybean can be achieved through sequential application of glyphosate along with pendimethalin at 1 kg ai ha-1 each PE followed by PoE use of imazethapyr at 100 g ai ha-1 at 30 DAS.

Asunto(s)

Herbicidas , Glycine max , Control de Malezas , Agricultura , Grano Comestible

RESUMEN

OBJECTIVE: Large data on the clinical characteristics and outcome of COVID-19 in the Indian population are scarce. We analysed the factors associated with mortality in a cohort of moderately and severely ill patients with COVID-19 enrolled in a randomised trial on convalescent plasma. DESIGN: Secondary analysis of data from a Phase II, Open Label, Randomized Controlled Trial to Assess the Safety and Efficacy of Convalescent Plasma to Limit COVID-19 Associated Complications in Moderate Disease. SETTING: 39 public and private hospitals across India during the study period from 22 April to 14 July 2020. PARTICIPANTS: Of the 464 patients recruited, two were lost to follow-up, nine withdrew consent and two patients did not receive the intervention after randomisation. The cohort of 451 participants with known outcome at 28 days was analysed. PRIMARY OUTCOME MEASURE: Factors associated with all-cause mortality at 28 days after enrolment. RESULTS: The mean (SD) age was 51±12.4 years; 76.7% were males. Admission Sequential Organ Failure Assessment score was 2.4±1.1. Non-invasive ventilation, invasive ventilation and vasopressor therapy were required in 98.9%, 8.4% and 4.0%, respectively. The 28-day mortality was 14.4%. Median time from symptom onset to hospital admission was similar in survivors (4 days; IQR 3-7) and non-survivors (4 days; IQR 3-6). Patients with two or more comorbidities had 2.25 (95% CI 1.18 to 4.29, p=0.014) times risk of death. When compared with survivors, admission interleukin-6 levels were higher (p<0.001) in non-survivors and increased further on day 3. On multivariable Fine and Gray model, severity of illness (subdistribution HR 1.22, 95% CI 1.11 to 1.35, p<0.001), PaO2/FiO2 ratio <100 (3.47, 1.64-7.37, p=0.001), neutrophil lymphocyte ratio >10 (9.97, 3.65-27.13, p<0.001), D-dimer >1.0 mg/L (2.50, 1.14-5.48, p=0.022), ferritin ≥500 ng/mL (2.67, 1.44-4.96, p=0.002) and lactate dehydrogenase ≥450 IU/L (2.96, 1.60-5.45, p=0.001) were significantly associated with death. CONCLUSION: In this cohort of moderately and severely ill patients with COVID-19, severity of illness, underlying comorbidities and elevated levels of inflammatory markers were significantly associated with death. TRIAL REGISTRATION NUMBER: CTRI/2020/04/024775.

Asunto(s)

COVID-19 , Adulto , COVID-19/terapia , Humanos , Inmunización Pasiva , India/epidemiología , Persona de Mediana Edad , SARS-CoV-2 , Sueroterapia para COVID-19

RESUMEN

Crude methanol extracts of fruits, seeds, and bark of Zanthoxylum armatum were investigated in vitro for antimicrobial activities against 9 different bacterial strains: Bacillus subtilis, Enterococcus faecalis, Proteus vulgaris, Pseudomonas aeruginosa, Salmonella typhi, Shigella dysenteriae, Staphylococcus aureus, methicillin-resistant Staphylococcus aureus (MRSA), and Staphylococcus epidermidis using agar well diffusion method, and the MBC values were determined. Only 5 bacteria, i.e., Bacillus subtilis, Enterococcus faecalis, MRSA, Staphylococcus aureus, and Staphylococcus epidermidis exhibited antibacterial properties against the different extracts. The fruit and seed extracts showed activities against 5 bacteria, while the bark extract was active against 2 bacteria only (MRSA and Staphylococcus aureus). Staphylococcus aureus was found to be more susceptible for all the extracts compared to other strains. The maximum ZOI of 20.72 mm was produced by fruits (wild) and 18.10 mm (cultivated) against Staphylococcus aureus. Likewise, the least ZOI of 11.73 mm was produced by seeds (wild) and 11.29 mm (cultivated) against Escherichia faecalis. Similarly, the lowest MBC value of 0.78 mg/mL was obtained for fruit extracts against MRSA, 1.56 mg/mL for fruits, seeds, and bark extracts against Bacillus subtilis, MRSA, and Staphylococcus aureus, and highest value of 50 mg/mL for fruits and seeds extracts against S. epidermidis. The fruits, seeds, and bark extracts of Z. armatum exhibited remarkable antibacterial properties against different pathogenic bacteria causing several diseases, which suggests the potential use of this plant for treating different bacterial diseases such as skin infection, urinary tract infection, dental problems, diarrhea, and dysentery.

RESUMEN

BACKGROUND: Finger millet is the fourth major crop in Nepal and is cultivated in a traditional integrated subsistence system. Timely rain and appropriate temperature predominately affects crop distribution and yield. Climate change is evident in Nepal and it is imperative to understand how it affects habitat suitability of finger millet. Main objective of this study was to map the current suitable habitat and predicting the potential changes in the future under different climate scenarios in Nepal. Habitat mapping is important for maximizing production and minimizing the loss of local landraces. RESULTS: Maxent model was used in this study to quantify the current suitable habitat and changes in the future habitat suitability of finger millet, based on representative concentration pathways (RCP) (RCP 2.6, 4.5, 6.0 and 8.5) in two different time periods (2050 and 2070AD) using climatic predictive variables and species localities. The model shows that 39.7% (58512.71 km2) area of Nepal is highly suitable for finger millet, with cultivation mostly between 96 and 2300 m above sea level. Eastern and central parts of Nepal have more suitable areas than western parts. Our research clearly shows that the future climatic suitable area of finger millet would shrink by 4.3 to 8.9% in 2050 and 8.9-10.5% under different RCPs by 2070. CONCLUSION: Finger millet is mostly cultivated in mid-hill terraces. The substantial increase in temperature due to climate change may be one reason for decrease in habitat suitability of finger millet. This situation would further threat loss of local landraces of finger millet in the future. The findings can help in planning and policy framing for climate resilient smart agriculture practice.

Asunto(s)

Eleusine , Agricultura , Cambio Climático , Ecosistema , Nepal

RESUMEN

Natural antioxidants present in several medicinal plants are responsible for inhibiting the harmful effects of oxidative stress. These plants contain polyphenols and flavonoids that act as free radical scavengers and reduce oxidative stress and may be an alternative remedy to cure various harmful human diseases. This study aims to quantify the total phenolic and flavonoid contents (TPC and TFC) and antioxidant properties of methanol extracts of fruits, seeds, and bark of an important medicinal and aromatic plant, Zanthoxylum armatum collected from wild and cultivated populations in Nepal. TPC was determined by Folin-Ciocalteu colorimetric method using gallic acid as standard, and various concentrations of the extract solutions were measured at 760 nm. TFC was calculated by aluminum chloride colorimetric assay. Quercetin was used as standard, and the absorbance was measured at 510 nm. The antioxidant potential of the different extracts was estimated by DPPH free radical scavenging assay, and the absorbance was measured at 517 nm. The highest TPC value was 226.3 ± 1.14 mg GAE/g in wild fruits, and the lowest was 137.72 ± 4.21 mg GAE/g in cultivated seeds. Similarly, the highest TFC value was 135.17 ± 2.02 mg QE/g in cultivated fruits, and the lowest was 76.58 ± 4.18 mg QE/g in cultivated seeds. The extracts showed variable antioxidant properties. The fruits exhibited excellent antioxidant properties with IC50 values of 40.62 µg/mL and 45.62 µg/mL for cultivated and wild fruits, respectively. Similarly, the IC50 values of the bark were 63.39 µg/mL and 67.82 µg/mL, respectively, for cultivated and wild samples. And the least antioxidant capacity was shown by the seeds extract with IC50 values of 86.75 µg/mL and 94.49 µg/mL for wild and cultivated seeds, respectively. The IC50 value of the standard ascorbic acid was 36.22 µg/mL. Different extracts of Z. armatum contain considerable amount of phenols and flavonoids, including antioxidant properties, suggesting the potential use of this species in pharmacy and phytotherapy as a source of natural antioxidants.

Asunto(s)

Antioxidantes/química , Antioxidantes/farmacología , Flavonoides/química , Frutas/química , Fenoles/química , Corteza de la Planta/química , Semillas/química , Zanthoxylum/química , Relación Dosis-Respuesta a Droga , Depuradores de Radicales Libres/química , Depuradores de Radicales Libres/farmacología , Extractos Vegetales/química , Extractos Vegetales/farmacología

RESUMEN

ETHNOPHARMACOLOGICAL RELEVANCE: Zanthoxylum armatum DC. possesses several medicinal properties and has been commonly used in different indigenous medicinal practices to cure several diseases because of its stomachic, carminative and anthelmintic properties. AIM: This review paper aims to provide an update on and analysis of information about the ecology, uses, phytochemistry, pharmacology, trade opportunities, policy gaps for the commercialization of this species forming a basis for further scientific innovations MATERIALS AND METHODS: Information was gathered through a search of different books, journals, articles, annual reports, proceedings and web-based materials. RESULT: Alkaloids, sterols, phenolics, lignins coumarins, terpenoids and flavonoids have been identified from leaves, fruits, stem, bark and seeds. Its trade value is also very high with its manifold applications in Ayurveda, allopathy, general pharmacy, and other industries. Antimicrobial, antiviral, antioxidant, anti-inflammatory, cytotoxic, hepato-protective, insecticidal/larvicidal effects are of particular relevance. CONCLUSION: It is one of the prioritized medicinal plants for economic development in Nepal. Owing to its diverse applications, the species can be developed as an important commodity for alleviation of poverty in rural areas. The various ethno-pharmacological applications of Zanthoxylum armatum have been verified by several related researches. More extensive study on the individual specific phyto-component can lead to novel innovations for the well-being of mankind.

Asunto(s)

Fitoterapia , Preparaciones de Plantas/uso terapéutico , Zanthoxylum , Animales , Etnobotánica , Humanos , Medicina Tradicional , Nepal , Fitoquímicos/análisis , Preparaciones de Plantas/farmacología , Zanthoxylum/química

RESUMEN

Selection of appropriate residue application method is essential for better use of biomass for soil and environmental health improvement. A laboratory incubation experiment was conducted for 75 days to investigate C and N mineralization of residues of soybean (Glycine max L.), chickpea (Cicer arietinum L.), maize (Zea mays L.), and wheat (Triticum aestivum L.) placed on the soil surface and incorporated into the soil. The residue of soybean and chickpea had a greater decomposition rate than that of maize and wheat, despite of their placements. Higher rate of decomposition of the residue of soybean and chickpea was recorded when it was kept on the soil surface while soil incorporation of residue of wheat and maize resulted in faster decomposition. Therefore, these findings could be used as guidelines for management of crop residue application in farmland to improve soil and environmental quality.

Asunto(s)

Agricultura/métodos , Carbono/química , Productos Agrícolas/química , Nitrógeno/química , Suelo/química , Biomasa , Carbono/análisis , Productos Agrícolas/metabolismo , Monitoreo del Ambiente , Nitrógeno/análisis , Glycine max , Triticum/metabolismo , Zea mays/química

RESUMEN

Loperamide is an over-the-counter antidiarrheal agent that is considered by many patients to be safe, but has been used as a drug of abuse due to its opioid properties. However, cardiotoxicity has been reported, prompting the FDA to release a warning regarding the arrhythmogenic potential of loperamide. We present a case of a 38-year-old female presenting with cardiac arrest thought to be secondary to abuse of the loperamide that she was using to alleviate the heroin withdrawal symptoms. Cardiac ischemia and other drug toxicities were ruled out. Loperamide induces QTc prolongation and cardiac dysrhythmias. She had recurrent ventricular arrhythmias with multiple cardiac arrests. The persistence of the cardiotoxicity for a longer duration than previously reported in the literature is unique in this clinical presentation. We also highlight the potential mechanisms for loperamide cardiotoxicity and its challenging management. Abbreviations: ACLS: Advanced cardiac life support; GI: Gastrointestinal.

RESUMEN

To compare the bacteriological cure rate of short-course (3-day) treatment of uncomplicated urinary tract infection (UTI) using co-trimoxazole, norfloxacin and levofloxacin, patients with uncomplicated UTI were randomized to receive either co-trimoxazole (960 mg) twice a day or norfloxacin (400 mg) twice a day or levofloxacin (250 mg) once a day for three days. Urine culture was done at the end of treatment and evaluated for bacteriological cure rate in each group. Among a total of 175 patients, Escherichia coli (74.29%) was the most common organism isolated followed by Klebsiella (11.43%), Streptococcus (6.29%), Staphylococcus saphrophyticus (5.14%), and Pseudomonas (2.86%). At the end of three days' treatment, bacteriological cure rates were 86.2%, 87.7% and 83.3% for co-trimoxazole, norfloxacin and levofloxacin, respectively (p>0.05). Therefore short-course treatment with co-trimoxazole 960 mg twice a day, norfloxacin 400 mg twice a day and levofloxacin 250 mg once a day are almost equally effective for treatment of uncomplicated UTI.

Asunto(s)

Antibacterianos/uso terapéutico , Levofloxacino/uso terapéutico , Norfloxacino/uso terapéutico , Pacientes Ambulatorios , Combinación Trimetoprim y Sulfametoxazol/uso terapéutico , Infecciones Urinarias/tratamiento farmacológico , Adolescente , Adulto , Anciano , Relación Dosis-Respuesta a Droga , Método Doble Ciego , Quimioterapia Combinada , Femenino , Humanos , India , Masculino , Persona de Mediana Edad , Factores de Tiempo , Resultado del Tratamiento , Infecciones Urinarias/microbiología

RESUMEN

We report a case of isoniazid induced convulsions in 35 years old male alcoholic and smoker patient receiving intensive phase therapy for pulmonary tuberculosis. A case was confirmed by accidental positive de-challenge and rechallenge as well as ruled out other conditions. Use of isoniazid in alcoholic and smoker patient required a caution for prevention of neurological adverse reactions. Pyridoxine should always be prescribed to such patients for the prevention of such adverse reaction.

Asunto(s)

Alcoholismo/complicaciones , Antituberculosos/efectos adversos , Isoniazida/efectos adversos , Convulsiones/inducido químicamente , Fumar/efectos adversos , Tuberculosis Pulmonar/tratamiento farmacológico , Adulto , Anticonvulsivantes/uso terapéutico , Humanos , Masculino , Piridoxina/uso terapéutico , Factores de Riesgo , Convulsiones/diagnóstico , Convulsiones/tratamiento farmacológico , Resultado del Tratamiento , Tuberculosis Pulmonar/diagnóstico , Tuberculosis Pulmonar/microbiología , Complejo Vitamínico B/uso terapéutico

RESUMEN

BACKGROUND: Dyslipidemia due to diabetes is characterized by hypertriglyceridemia and reduced levels of high-density lipoprotein cholesterol (HDL-C) and elevated or normal levels of low-density lipoprotein cholesterol (LDL-C) in type 2 diabetes mellitus (T2DM). The objectives of this Phase III study were to evaluate the safety, tolerability, and efficacy of saroglitazar (ZYH1) 2-mg and 4-mg tablets (Lipaglyn™; Zydus Cadila, Ahmedabad, India) compared with placebo in patients with diabetic dyslipidemia who are not controlled with atorvastatin 10 mg therapy. SUBJECTS AND METHODS: This was a 16-week prospective, multicenter, randomized, double-blind, placebo controlled, three-arm Phase III study in subjects with hypertriglyceridemia (>200 and <500 mg/dL) with T2DM not controlled with atorvastatin 10 mg. The study consisted of a run-in period of 4 weeks of life-style modification followed by 12 weeks of treatment with saroglitazar (2-mg or 4-mg) or placebo tablets. The primary end point was the change in plasma triglyceride level compared with baseline and the placebo arm at the end of Week 12. The secondary exploratory end points were change in lipid profile and fasting plasma glucose at Week 12. In total, 302 subjects were randomized to receive one of the treatments, saroglitazar 2 mg (n=101) or saroglitazar 4 mg (n=99), or matching placebo (n=102). Patients who received study medication and had undergone at least one post baseline efficacy evaluation were included in the efficacy analysis. RESULTS: At Week 12, saroglitazar 2-mg and 4-mg tablets significantly reduced mean plasma triglyceride levels by -45.5±3.03% and -46.7±3.02% (mean±SE), respectively, and the difference was significant (P<0.001) compared with placebo. Saroglitazar 2 mg demonstrated significant decrease in levels of non-HDL-C, very LDL-C, total cholesterol, and fasting plasma glucose. Additionally, saroglitazar 4 mg also significantly reduced LDL-C and apolipoprotein B levels. Saroglitazar was found to be safe and well tolerated by patients. CONCLUSIONS: Saroglitazar appeared to be an effective and safe therapeutic option for improving hypertriglyceridemia in patients with T2DM.

Asunto(s)

Anticolesterolemiantes/uso terapéutico , Glucemia/efectos de los fármacos , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Angiopatías Diabéticas/prevención & control , Hipertrigliceridemia/tratamiento farmacológico , Fenilpropionatos/uso terapéutico , Pirroles/uso terapéutico , Adolescente , Adulto , Anciano , Anticolesterolemiantes/farmacología , Atorvastatina , Glucemia/metabolismo , HDL-Colesterol/sangre , LDL-Colesterol/sangre , Diabetes Mellitus Tipo 2/sangre , Angiopatías Diabéticas/sangre , Método Doble Ciego , Ayuno , Femenino , Ácidos Heptanoicos/uso terapéutico , Humanos , Inhibidores de Hidroximetilglutaril-CoA Reductasas/uso terapéutico , Hipertrigliceridemia/sangre , Masculino , Persona de Mediana Edad , Seguridad del Paciente , Fenilpropionatos/farmacología , Estudios Prospectivos , Pirroles/farmacología , Conducta de Reducción del Riesgo , Insuficiencia del Tratamiento , Resultado del Tratamiento , Triglicéridos/sangre

RESUMEN

The crude extract of Swertia chirayita, an important medicinal plant of Nepal, is locally used for many diseases including type 2 diabetes. In this study, crude aqueous and 12% ethanol solution extracts of S. chirayita collected from nine districts of Nepal were analyzed for anti-diabetic-linked anti-hyperglycemia potential using in vitro biochemical assays. There was moderate-to-high positive correlation between antioxidant activity and total phenolic content of both extracts and moderate-to-high α-glucosidase inhibitory activity. Although the anti-diabetic property of S. chirayita is mainly attributed to the phytochemical swerchirin present in its hexane fraction, we propose that the crude extract of this plant used in local healing also has anti-hyperglycemia potential. The crude extracts indicated the presence of three main phytochemicals mainly mangiferin, swertiamarin, and amarogentin and their derivatives. Among the standard compounds (mangiferin, swertiamarin, and amarogentin), mangiferin showed α-glucosidase and 2,2-diphenyl-1-picrylhydrazyl radical inhibitory activity indicating anti-hyperglycemia potential.

Asunto(s)

Hipoglucemiantes/química , Extractos Vegetales/química , Swertia/química , Xantonas/química , Inhibidores de la Enzima Convertidora de Angiotensina/química , Inhibidores de la Enzima Convertidora de Angiotensina/farmacología , Antioxidantes/química , Antioxidantes/farmacología , Compuestos de Bifenilo/antagonistas & inhibidores , Cromatografía Líquida de Alta Presión , Inhibidores de Glicósido Hidrolasas , Hipoglucemiantes/farmacología , Concentración 50 Inhibidora , Iridoides/química , Iridoides/farmacología , Nepal , Fenoles/química , Fenoles/farmacología , Picratos/antagonistas & inhibidores , Extractos Vegetales/farmacología , Xantonas/farmacología

RESUMEN

The bark of several coniferous species, a waste product of the timber industry, contains significant amounts of natural antioxidants. In our ongoing studies of Nepalese medicinal plants, we examined the bark from Abies spectabilis as the starting material for extracting antioxidant compounds. In vitro antioxidant activity evaluated by means of three antioxidant methods, namely 2,2-diphenyl-1-picrylhydrazyl (DPPH), Briggs-Rauscher oscillating reaction (BR) and Trolox Equivalent Antioxidant Capacity (TEAC) and total phenol contents with the Folin-Ciocalteau reagent; the ferrous iron chelating capacity was also assessed. The methanol extract of A. spectabilis showed significant antioxidant activity and polyphenol contents (IC(50) 4.13 µg/mL, 0.20 µg/mL eq. resorcinol, 4.22 mM eq. Trolox, 3.9 µg/g eq. gallic Acid in the DPPH, BR, TEAC and Folin-Ciocalteau tests, respectively) and weak Fe(2+) chelating capacity. Phytochemical studies were also carried out with 1D- and 2D NMR experiments and DI-ESI-MS, HPLC-DAD and LC-MSn measurements. Oligomeric C-type proanthocyanidins, mainly trimeric gallocatechin derivatives, were the most abundant compounds (16% of extract expressed as procyanindin B1). Gallocatechin oligomers (up to six units) and prodelphynidin-gallocatechin polymers were also identified in the extract. Prodelphynidin B4, cyclograndisolide and trans-docosanil ferulate were also isolated and characterized by NMR and MS spectroscopy.

Asunto(s)

Abies/química , Corteza de la Planta/química , Extractos Vegetales/farmacología , Cromatografía Líquida de Alta Presión , Espectroscopía de Resonancia Magnética , Nepal , Extractos Vegetales/aislamiento & purificación , Espectrometría de Masa por Ionización de Electrospray

RESUMEN

Our ongoing studies of Nepalese medicinal plants has led to the isolation and characterization of five new triterpenes, two known triterpenes and two phenolic derivatives from Abies spectabilis (D.Don) Mirb leaves grown in the high mountain. The structures of the isolated compounds were characterized by means of 1D and 2D NMR spectroscopic and MS techniques.

Asunto(s)

Abies/química , Hojas de la Planta/química , Triterpenos/química , Espectroscopía de Resonancia Magnética , Estructura Molecular , Nepal

RESUMEN

Nepal the "Shangri-La" in the lap of the Himalayas is gearing up for modern times as it starts rebuilding after a decade of senseless violence and destruction. The nation one of the poorest in the global development index is rich in natural resources and biodiversity. Reports of medicinal plants far exceeding those recorded and reported so far are encouraging and at the same time concerns for medicinal plants under threat as a result of overexploitation are emerging from Nepal. The harsh mountain terrains, lack of industrialization and harnessing potentiality of its areas of strength; water; natural resources and tourism make it poor in per capita income which averages ~ 300 US$, with half the population living under >1$ a day. Nepal is beginning to realize that the way ahead is only possible through the path of Science and Technology (ST). Nepal Academy of Science and Technology formerly known as Royal Academy of Science and Technology organized the fifth national conference held every 4 years that took place in the capital Kathmandu during November 10-12, 2008. The ST initiation event saw the participation of ~ 1400 people representing over 150 organizations from the country and experts from abroad. The theme for the fifth national meet was "Science, Technology and Innovation for Prosperous Nepal". Complementary and Alternative Medicine (CAM) was an important theme in the event as the realization for the need of ST research focused in CAM for harnessing the chemo diversity potential was univocally approved.

RESUMEN

One new glycoside derivative from syringic acid and one new phenol glycoside, curculigoside E (1) and orchioside D (2), were isolated and characterized from the rootstock of Curculigo orchioides collected in the Nawalparasi District (Nepal). The structures of the new isolated compounds were elucidated by means of spectroscopic methods such as 1D, 2D NMR and MS.

Asunto(s)

Curculigo/química , Glicósidos/aislamiento & purificación , Fenoles/aislamiento & purificación , Glicósidos/química , Estructura Molecular , Fenoles/química , Extractos Vegetales/química , Extractos Vegetales/aislamiento & purificación , Raíces de Plantas

RESUMEN

Three new flavonoid glycosides, 3-O-[beta-D-glucopyranosyl-(1-->3)-(4-O-trans-p-coumaroyl)-alpha-L-rhamnopyranosyl-(1-->6)-beta-D-glucopyranosyl]-7-O-[beta-D-glucopyranosyl-(1-->3)-alpha-L-rhamnopyranosyl]kaempferol, 3-O-[beta-D-glucopyranosyl-(1-->3)-(4-O-trans-p-coumaroyl)-alpha-L-rhamnopyranosyl-(1-->6)-beta-D-glucopyranosyl]-7-O-[beta-D-glucopyranosyl-(1-->3)-alpha-L-rhamnopyranosyl]quercetin and 7-O-[beta-D-glucopyranosyl-(1-->3)-alpha-L-rhamnopyranosyl]quercetin were isolated from the aqueous extract of the aerial parts of Aconitum naviculare. Their structures were elucidated by spectral analysis (HRAPI-TOF MS, 1H, 13C NMR, HMQC, HMBC, DFQ-COSY, ROESY and TOCSY).

Asunto(s)

Flavonoides/aislamiento & purificación , Glicósidos/aislamiento & purificación , Plantas Medicinales/química , Flavonoides/química , Glicósidos/química , Espectroscopía de Resonancia Magnética , Estructura Molecular , Nepal