Anti-inflammatory activity of compounds isolated from the aerial parts of Abrus precatorius (Fabaceae).

Two triterpenoid saponins 1 and 2 isolated from the aerial parts of Abrus precatorius and their acetates derivatives, 3 and 4 have been tested for anti-inflammatory activity using the croton oil ear model. All the compounds exhibited anti-inflammatory activity but the acetates showed greater inhibition than the parent compounds.     

Burden of Severe Pneumonia,Pneumococcal Pneumonia and Pneumonia Deaths in Indian States: Modelling Based Estimates

The burden of severe pneumonia in terms of morbidity and mortality is unknown in India especially at sub-national level. In this context, we aimed to estimate the number of severe pneumonia episodes, pneumococcal pneumonia episodes and pneumonia deaths in children younger than 5 years in 2010. We adapted and parameterized a mathematical model based on the epidemiological concept of potential impact fraction developed CHERG for this analysis. The key parameters that determine the distribution of severe pneumonia episode across Indian states were state-specific under-5 population, state-specific prevalence of selected definite pneumonia risk factors and meta-estimates of relative risks for each of these risk factors. We applied the incidence estimates and attributable fraction of risk factors to population estimates for 2010 of each Indian state. We then estimated the number of pneumococcal pneumonia cases by applying the vaccine probe methodology to an existing trial. We estimated mortality due to severe pneumonia and pneumococcal pneumonia by combining incidence estimates with case fatality ratios from multi-centric hospital-based studies. Our results suggest that in 2010, 3.6 million (3.3–3.9 million) episodes of severe pneumonia and 0.35 million (0.31–0.40 million) all cause pneumonia deaths occurred in children younger than 5 years in India. The states that merit special mention include Uttar Pradesh where 18.1% children reside but contribute 24% of pneumonia cases and 26% pneumonia deaths, Bihar (11.3% children, 16% cases, 22% deaths) Madhya Pradesh (6.6% children, 9% cases, 12% deaths), and Rajasthan (6.6% children, 8% cases, 11% deaths). Further, we estimated that 0.56 million (0.49–0.64 million) severe episodes of pneumococcal pneumonia and 105 thousand (92–119 thousand) pneumococcal deaths occurred in India. The top contributors to India’s pneumococcal pneumonia burden were Uttar Pradesh, Bihar, Madhya Pradesh and Rajasthan in that order. Our results highlight the need to improve access to care and increase coverage and equity of pneumonia preventing vaccines in states with high pneumonia burden.     

Friends without benefits: When we react negatively to helpful and generous friends

Being able to identify reliable friends and allies is key to surviving and thriving in the social world. Many cooperative accounts of friendship argue that people select friends based on how helpful and generous they are. While people certainly like helpful and generous others, here we explore a context in which people might respond negatively to a friend being prosocial: When one's friend is more helpful or generous toward another friend. We argue that such preferential prosociality prompts negative reactions, even when the alternative is a friend being less prosocial overall, because giving preferentially to another friend may be viewed as a threat of potential displacement of one's own friendship. In four studies (N?=?702), we predict and find that people respond negatively to a friend who was more helpful (Studies 1–2) and generous (Studies 3–4), preferring instead that a friend be less helpful and generous overall. Importantly, this preferential prosociality was viewed as particularly negative when the recipient was another friend and was seen as much less negative when the recipient was a relative (Study 1 and 4) or a romantic partner (Study 2). We discuss the implications of these results for cooperation and alliance-based accounts of friendship.     

Genome analysis of amaranths: Determination of inter- and intra-species variations

Amaranths are an important group of plants and include grain, vegetable and ornamental types. Despite the economic importance of the amaranths, there is very little information available about the extent and nature of genetic diversity present in the genus Amaranthus at molecular level. We now report the randomly amplified polymorphic DNA (RAPD) profiles of different species of Amaranthus as well as different accessions of the species. These RAPD analyses have been carried out using 65 arbitrary sequence decamer primers. From the RAPD data, an UPGMA dendrogram illustrating the inter-as well as intra-species relationships has been computed. The putative hybrid origin of A.dubious from A. hybridus and A. spinosus is also ruled out by the RAPD data. The trends of species relationships amongst the amaranths determined by RAPDs is consistent with their cytogenetic and evolutionary relationships that have already been determined. NBRI Communication No:464 (N.S.).     

Nitric Oxide Synthase Inhibitors Do Not Attenuate Diacylglycerol or Monoacylglycerol Lipase Activities in Synaptoneurosomes

Neuron-enriched cultures and synaptoneurosomal fractions from 10 day-old rat brain contain diacylglycerol and monoacylglycerol lipase activities. Glutamate and its analogs stimulate the activities of diacylglycerol and monoacylglycerol lipases in a time-and dose-dependent manner. Stimulation of diacylglycerol and monoacylglycerol lipases by glutamate or NMDA can be blocked by MK-801 (non-competitive antagonist). Nitro L-arginine methyl ester and L-methylarginine have no effect on glutamate stimulated activities of diacylglycerol and monoacylglycerol lipases. Our studies suggest that synaptoneurosomal preparations from young rat brain are useful for obtaining important information on signal transduction.     

Induction of atrazine resistance and somatic embryogenesis in Solanum melongena

 The effects of atrazine on cotyledon cultures of Solanum melongena were investigated with a view to establishing a system for in vitro selection of resistant mutants. At herbicide levels producing little growth inhibition some chlorophyll loss occurred associated with the production of albino shoots. At 15 mg/l bleaching was more pronounced and was accompanied by the development of necrotic spots; however, efficient bleaching was associated with severe suppression of growth. Mutagenesis with EMS resulted in herbicide-resistant mutants based on the embryogenic ability of mutagenised explants placed on medium containing selective levels of sucrose (0.2%) and atrazine (15 mg/l). Different morphogenetic responses were observed when the levels of sucrose (0.2–5%) were altered. Somatic embryogenesis was observed at low sucrose concentrations (0.2–0.5%). Both embryogenesis and shoot regeneration occurred in 1% sucrose. Shoot regeneration was maximum in 2% sucrose and the regenerating ability decreased with a further increase in sucrose concentration (3–5%). However, lowering of sucrose concentration from 2% to 0.2% caused complete bleaching, permitting the selection of herbicide-resistant mutants. Received: 26 November 1996 / Accepted: 20 December 1996     

Use of Sodium Hydroxide in the Preparation of Epidermal Peels from Certain Coniferous Leaves Rich in Resins and Tannins

Epidermal peels free from resinous substances and tannins were prepared by treating specimens with 5% NaOH for 1-2 weeks at 40-45 C. After a thorough washing in water epidermal peels were obtained by removing the mesophyll cells by brushing with a soft-haired brush or by moderate agitation in water. Peels stained with iron alum hematoxyh or Bismark brown were found to be good enough to allow detailed histolopical investigation.     

Purification and properties of arylsulphatase A from chicken brain

1. Chicken brain arylsulphatase A was purified 2000-fold, with overall recovery 14%, by using ammonium sulphate fractionation, ethanol precipitation, Sephadex G-200 gel filtration and DEAE-Sephadex column chromatography. 2. The purified preparation was free from beta-glucuronidase, beta-galactosidase, acid phosphatase, inorganic pyrophosphatase and adenosine 3'-phosphate 5'-sulphatophosphate sulphohydrolase activities. 3. Polyacrylamide-gel electrophoresis indicated that the purified preparation was not homogeneous. 4. Chicken brain arylsulphatase was markedly inhibited by carbonyl reagents in the presence of traces of Cu(2+) in the system. Other metal ions such as Fe(2+) and Zn(2+), were inactive. 5. Ascorbic acid alone had no effect on enzyme activity but enhances the inhibition by Cu(2+). 6. Chicken brain arylsulphatase A resembled arylsulphatase A of other animal species in its kinetic properties such as K(m) value, anomalous time-activity relationship and the inhibitory effect of phosphate, sulphite and sulphate ions. However, its electrophoretic mobility, behaviour under zinc acetate fractionation and stimulation by Ag(+) were similar to arylsulphatase B of other animal species. Thus, this enzyme did not correspond to either arylsulphatase A or arylsulphatase B but properties of both. 7. The purified enzyme preparation can degrade cerebroside 3-sulphate.