Performance Evaluation of Magnetic Field Intensity on Iron ore slimes

Iron ore industries facing a problem of huge slime generation, dumping causing not only environmental issues but prime natural resources are wasted also. A detailed characterization followed by beneficiation of two different slimes of iron ores generated during processing of ROM and dump fines was studied using hydrocyclone followed by wet high intensity magnetic separator to recover the valuables and as these are already in fine state can be converted to pellets for DRI or blast furnace application. Slime sample-I, generated from ROM through scrubbing and sizing for coarse lump as well as fines and classification assayed 59.25% Fe, 5.14% Al 2 O 3, 4.11% SiO 2 , and 4.83% LOI. The Slime sample-II generated from dump fines after classification assayed 58.4% Fe, 5.27% Al 2 O 3, 4.67% SiO 2 , and 5.22% LOI. Although the slimes chemical composition is different, XRD analysis shows that hematite and goethite are major phase whereas gibbsite, kaolinite and quartz are minor gangue minerals phases. One interesting aspect of the observation is that Slime –I indicated higher percentage of goethite compared to low grade slime –II. Multi-stage processing has been done at different magnetic field intensity for two different slimes. Detailed characterization of product sample has been carried out to study the performance of field intensity on separation efficiency

Evaluation of diagnostic efficacy of hepatobiliary scintigraphy as a diagnostic procedure in pediatric practice with special reference to cholestatic jaundice

Background: The objective was to assess the diagnostic efficacy of hepatobiliary scintigraphy (Tc99 mebrofenin) in case of cholestatic jaundice in pediatric practice.Method: Study conducted on 45 cases from 0-6 yrs. of age. Out of 45 pt 20 pt excluded from study Hepatobiliary Scintigraphy (Tc99m Mebrofinin) was performed in 25 cases. Injection of Tc99m mebrofinin (1-2 mCi) IV was given to each subject. Dynamic hepatic scan was done upto initial 1 hour study and additional delayed images were taken at 4 & 24 hrs only in case of non-visualization of tracer in the intestine after initial 1 hr. study.Results: In this study hepatobiliary scintigraphy was 100% sensitive, 93.73% specific, 80% positive predictive values, 100% negative predictive value, 6.23% false positive result and virtually no false negative result for biliary atresia. Conclusion: It is concluded that Tc99m mebrofenin hepatobiliary scintigraphy has proven to be reliable noninvasive imaging modality in evaluating cholestatic jaundice in pediatric practice as it carries a high sensitive & specific value, good positive & no negative predictive value, few false positive & virtually no false negative results.

Petrographic investigation of selected natural cokes from Damodar Valley coalfields

The natural coke is a kind of fossil fuel and its reserves are scattered in almost coalfields covering approx. 2600 Km 2. In Indian coalfields, the igneous intrusion varies, causing regional in-situ burning of coal seams. The intrusion process itself is quite complex and does not follow any fixed trend everywhere. The chemical composition of the intrusion also varies from place to place. Petrographic, physical and chemical characterizations of some selected natural coke samples of Damodar Valley coalfields were done. The comprehensive study on above samples helped a lot in differentiation of natural cokes, slightly heat affected coal and normal coals obtained after washability at different specific gravities. The yield of the samples after washability varied from sample to sample. Through petrographic studies by microscopy, an effort has been made to decipher the new classification schemes for microtextures and microstructures of natural coke, which are generated through in-situ carbonisation of coal seams. Isotropic, anisotropic components and mineral matters were differentiated. Some selected natural coke fractions were explored for value addition in different studies. The study was helpful in establishing industrial use of natural coke in Power, Cement and Carbon Artifact industry

Characteristics of Iron Ore Slime from Kiriburu, India

The mineralogical, size and chemical characteristics of slime vary from discharge point to the distal part of the Tailing pond of Kiriburu iron ore mines. They can be grouped as three end members of slime composition- (i) coarse grained dense martite microplaty hematite type, (ii) coarse to medium grained goethite and clay dominated martite hematite type, (iii) fine grained hematite-goethite-clay type, occurring systematically away from the discharge point. Any slime will have a bulk composition intermediate to these three end members. The study has significance in the planning for exploitation of slime

Effect of waterlogging tolerance in wheat (Tritium aestivum L.) at ear emergence stage on growth, biochemical and yield parameters in sodic soil

Globally more than one-third of the irrigated area is under waterlogging which limits our wheat production and out of which northern Indo-Gangetic plains of India alone had 2.5 million ha affected by irregular waterlogging. So, to meet out the food demand of ever-growing population we have to find some alternates to harness the potential of the waterlogged area. With this point of view this investigation was conducted to study the changes in growth and biochemical behavior of wheat due to waterlogging at ear emergence stage in sodic soil and also to assess the traits conferring higher yield at experimental site of department of crop physiology, Narendra Deva University of Agriculture & Technology, Kumarganj, Faizabad (U.P.), India. The results showed that the genotypic variability exists for waterlogging tolerance in wheat varieties evaluated under investigation. HD-2009 which is susceptible to waterlogging gave poor performance in terms of growth parameters, biochemical behavior and traits conferring higher yield under waterlogging conditions at ear head emergence stage in sodic soil as compared to HD-2851, KRL-3-4 and KRL-99 wheat varieties. KRL-99 (1.80g yield plant-1) gave best results followed KRL-3-4 (1.37g yield plant-1) by under waterlogged conditions at ear head emergence stage in sodic soil

Studies on ash reduction of a non-coking coal sample by froth flotation

Coal is a vital energy fuel world over, statistically contribution upto 55-60% and it plays a major role in the economic development of the country. In general Indian coals are poor in quality with high ash content and they need beneficiation prior to their utilization. CSIR-NML is pursuing dry beneficiation of non-coking coal for application in DRI, cement and thermal power plant. However, during the crushing of coal for dry separation, some amounts of ultrafines are generated. There are limitations in treating ultrafine particles by dry separation methods. To maximise the overall combustible recovery an attempt was made for ash reduction in a typical non-coking sample from Rajmahal by froth flotation with an initial target of 25% ash in the product. Kerosene and diesel oil were used as collectors for coal flotation. The coal sample was characterised thoroughly in terms of petrography characteristics, size analysis and proximate analysis. Proximate analysis indicated that the coal contains 34.8% ash, 23.52% VM, 6.86% moisture and 34.82% FC. The coal sample of -150μm was taken for flotation studies. The effect of important variables such as collector dosage, frother dosage and pH level are investigated for arriving the optimum value of yield/combustible recovery. Use of dispersant/depressant with diesel oil as collector was found to give better yield with an ash content of 25% with a combustible recovery of 72%. Efforts are put in to further reduce ash content in clean coal for metallurgical application

Prevalence and spectrum of hemoglobinopathies in tertiary care centre in a rural area of Madhya Pradesh

Background: Haemoglobinopathies like thalassaemia and sickle cell anaemia etc are increasing due to unawareness of rural population. This study indicates type of haemoglobinopathies amongst the patients of a rural based tertiary care hospital in one year and nine months.Methods: Five hundred ten patients were studied during last one year and nine month for all suspected cases of haemolytic anaemia based on Complete Blood Count, Red cell indices and Peripheral blood smear examination. Sickling test, test for Hb F and haemoglobin electrophoresis with quantification of bands are done in all these casesResults: Out of all 510 cases of anaemia 461 cases (90.39%) were confirmed to nonhaemolytic anaemia whereas 49 cases (9.60%) had shown abnormal haemoglobin bands on electrophoresis. Out of these 49 cases 29 (59.18%) were Males and 20 (40.81%) were females. Most common Haemoglobinopathy observed was Sickle cell b Thalassaemia 23 (4.50%) followed by b Thalassaemia Trait 9 (1.76%), Sickle Cell trait 7 (1.37%). b Thalassaemia Major 5 (0.98%) & Sickle Cell Disease 5 (0.98%) have equal prevalence. The onset of disease was most prominent in Neonatal to pediatric age group including early adolescent (0-18 years) followed by reproductive age group (19- 45 years). Few cases of old age (46+ years) were detected.Conclusion: Study provides data on the spectrum & pattern of Haemoglobinopathies in a rural tertiary care centre. Screening of all anemic patients should be done for Haemoglobinopathy and proper Genetic counseling must be given to all cases to prevent incidence of cases in future generation

In Vitro Doubled Haploid Production of Bacterial Blight Resistant Plants from BC2F1 Plants (Ranbir Basmati X Pau148) Through Anther Culture

Doubled haploid plants are very important for the development of complete homozygous plants from heterozygous parents in one generation as they possess duplicate copy of haploid chromosome. Haploid production is easily obtained from in vitro anther culture. The present study was undertaken with the objective to develop doubled haploids using anthers for in vitro induction of callus on N6 medium supplemented with various combinations and concentrations of 2,4-dichlorophenoxy acetic acid (2,4-D) (0.5-2.5 mg/L), Kinetin (0.5-1.0 mg/L) and Naphthalene acetic acid (NAA) (2.0 mg/L) as callus induction medium (CIM). The highest callus induction frequency was obtained when N6 medium fortified with 2,4-D (2.5 mg/L), Kinetin (0.5 mg/L) and NAA (2 mg/L) of 10.07 per cent. The induced callus was sub cultured for shoot regeneration on Murashige and Skoog medium (MS) supplemented with growth regulators: Kinetin and NAA (0.5 mg/L each) in combination with BAP (0.0 - 2.5 mg/L). MS medium supplemented with NAA (0.5 mg/L), Kinetin (0.5 mg/L) and BAP (1.5 mg/L) was most responsive exhibiting regeneration frequency of 28.1 per cent which resulted in maximum regeneration of green plantlets and only 5.21 per cent of albinos. Individual plantlets were separated and immersed in liquid MS medium augmented with NAA (0.5-1.0 mg/L) and BAP (0.5-1.0 mg/L). Maximum rooting was observed in MS medium with NAA (0.5 mg/L) and BAP (1.0 mg/L). The survival rate of in-vitro raised plants was 51.51 per cent. Of these surviving plants, 21 plants were observed to have the sterility percentage above 50 percent and hence can be considered as the doubled haploid plants. Plant DH8 is susceptible and DH20 is heterozygous for gene Xa21. Two plants are susceptible for gene xa1