Antiulcer Activity of Indigenous Plant Operculina turpethum

In the Indian traditional system of medicine Operculina turpethum is commonly used to treat various ailments including peptic ulcer, inflammation, and pain. Ulcer preventive and ulcer protective activities of HAOP and MOP stem bark extracts of Operculina turpethum (100 mg/kg, b.w., orally) were evaluated employing aspirin + pylorus ligation (APL) model in experimental rats. The results suggested that both extracts (HAOP and MOP) possess enhanced ulcer preventive and protective activities when compared with the standard drug ranitidine. HAOP showed more pronounced effect when compared to MOP. Further the result of the histopathological and biochemical studies also confirms potent ulcer preventive and protective nature of a extracts in a similar manner

BIOAVAILABLE FORMS OF HEAVY METALS FROM RICE SAMPLES AND ITS POTENTIAL HEALTH RISK ASSESSMENT

Food crops grown in contaminated soils have a greater accumulation of heavy metals and the consumption of food crops grown in the contaminated soils are the source of metals that enters into the human body. Rice being a major food crop, the presence of heavy metals should be monitored regularly for reducing health risk. The analysis of total heavy metal always overestimates the content which leads to misinterpretation of results; however, bioaccessible heavy metal analysis projects the actual health risk. Hence, the present study aims to assess the bioavailable form of heavy metals in rice. The rice samples were collected from 20 different places and used for the inherent and bioavailable metal estimation. In vitro simulated digestion method was applied for bioaccessible metal analysis. Metal concentration in polished rice ranged from 0.10 to 0.82, 0.10 to 1.07, 0.11 to 0.56 and 0.23 to 1.09 mg  kg-1 for Lead (Pb), Nickel (Ni), Cadmium (Cd) and Chromium (Cr), respectively. Twenty five percent of the samples recorded less than 0.028, 0.01, 0.01, and 0.03 mg kg-1 of bioaccessible Pb, Ni, Cd, and Cr, respectively. A significant negative correlation was observed between total metal concentration and bioaccessibility percentage. Targeted Hazard Quotient (THQ) of all the metals were less than one for adults indicating that there were no health risks, which undoubtedly reveals the importance of bioaccessible metal analysis. Hence, regular monitoring of heavy metals is essential to reduce the intensive accumulation in the human food chain.  Also, the present study has opened up a wide scope on human health risk assessment using an in vitro digestion model

A novel single step synthesis of dinitrosylmolybdenum derivatives directly from molybdate(VI) in aerobic and aqueous media

This article does not have an abstract

Rapid chemical identification of the nitrosyl group in complexes

A simple chemical test that enables rapid identification of coordinated nitric oxide

Electrophilic behaviour of coordinated nitrosyl in dinitrosylmolybdenum(II) derivatives. Isolation of [Mo(acac)<SUB>2</SUB>(hia)(NO)]

This article does not have an abstract

First report of the reductive nitrosylation of tungstate(VI) by hydroxylamine. Stereospecific Synthesis of [W(NO)<SUB>2</SUB>Cl<SUB>2</SUB>(L)<SUB>2</SUB>] (L=py, 3-Mepy, 4-Mepy)

Stereospecific synthesis of cis-dichlorotrans-bis(pyridine)-cis-dinitrosyltungsten(O) and the related 3-picoline and 4-picoline derivatives have been achieved by a single pot reductive nitrosylation of sodium tungstate(VI) by hydroxylamine in the presence of excess of pyridine (or picolines) as solvent

Bioconversion of Lignocellulosic Biomass to Fermentable Sugars by Immobilized Magnetic Cellulolytic Enzyme Cocktails

International audienc

Production, Partial Purification and Characterization of Enzyme Cocktail from Trichoderma citrinoviride AUKAR04 Through Solid-State Fermentation

International audienceA strain of Trichoderma citrinoviride AUKAR04 was identified on the basis of morphological and 5.8S ribosomal RNA sequencing [GenBank: KF698728]. It produces cocktail of enzymes such as xylanase (55,000 IU gds−1), CMCase (375 IU gds−1) and β-1,3-glucanase (695 IU gds−1) after 72 h under solid-state fermentation. These enzymes were partially purified by a three-phase partitioning method, which recovered the maximum activities of xylanase (99.8 %) with 5.7-fold, CMCase (96.5 %) with 5.5-fold and β-1,3-glucanase (98.4 %) with 5.6-fold purification. The maximum activity of xylanase was observed at pH 5.0, CMCase at pH 5.0–6.0 and β-1,3-glucanase at pH 6.0. Optimum temperature of xylanase and β-1,3-glucanase was found to be at 50 °C, while for CMCase was at 60 °C. The activities of these enzymes were enhanced by Mg2+ and Mn2+ ions. Eucalyptus pulp fiber was incubated for 14 h with the enzyme cocktail. Xylanase hydrolyzed the pulp to yield arabinose (475 mg L−1) and xylose (1795 mg L−1), CMCase and β-1,3-glucanase released glucose (18763 mg L−1). The length of fiber was reduced from 0.881 to 0.056 mm. This is indicative of the potential application on bioconversion of lignocellulosic biomass into fermentable sugars by the enzyme cocktail produced from T. citrinoviride AUKAR04 for sustainable production of bioethanol