Method of doping silicon, metal doped silicon, method of making solar cells, and solar cells

A low temperature process for forming a metal doped silicon layer in which a silicon layer is deposited onto a substrate at low temperatures, with a metal doping layer then deposited upon the silicon layer is described. This structure is then annealed at low temperatures to form a metal doped semiconductor having greater than about 1x10^20 dopant atoms per cubic cm of silicon

Method of doping silicon, metal doped silicon, method of making solar cells, and solar cells

A low temperature process for forming a metal doped silicon layer in which a silicon layer is deposited onto a substrate at low temperatures, with a metal doping layer then deposited upon the silicon layer is described. This structure is then annealed at low temperatures to form a metal doped semiconductor having greater than about 1x10^20 dopant atoms per cm3 of silicon

Regeneration potential of seedling explants of chilli (Capsicum annuum)

A study was conducted with hypocotyl, cotyledon and shoot tip of chilli as explants for regeneration on MS medium supplemented with different concentrations and combinations of auxins and cytokinins. Regeneration potential was determined by two ways. One is regeneration of shoot via callus formation from hypocotyls and cotyledon explants; another was direct shoot regeneration from shoot tip explant. The highest callus was induced from hypocotyl in a combination of BAP (5.0 mgL-1) with NAA (0.1 mgL-1) and cotyledon in a combination of BAP (5.0 mgL-1) with IAA ((1.0 mgL-1). The callus induction as well as shoot initiation was higher in hypocotyls than cotyledon. Shoot tips regenerated into plantlets directly with sporadic small callus at the base. Shoot elongation was accelerated by using additional supplementation of GA3 and AgNO3. Regenerated shoots rooted best on the MS medium supplemented with 0.1 mg L-1 NAA + 0.05 mg L-1 IBA

The effect of cutting interval on yield and nutrient composition of different plant fractions of Moringa oleifera tree

An experiment was carried out to evaluate the effect of cutting interval on biomass yield and chemical composition of different plant fractions of Moringa oleifera. In a completely randomized block design experiment, an established Moringa plot was divided into 12 equal plots and subjectedto three cutting intervals of 4, 6 and 8 weeks, each with four replications. The highest fresh and dry matter (DM) yields (t ha-1 cut-1) of total foliage, leaf and stem were obtained at the 8 weeks cutting interval followed by 6 and 4 weeks cutting interval. Effect of leaf to stem ratio was not significant (P>0.05) among harvesting intervals. The CP content of total foliage, leaf and stem was not different (P>0.05) over the harvesting intervals. The acid detergent fibre (ADF), neutral detergent fibre (NDF) and acid detergent lignin (ADL) of total foliage was significantly (P0.05) different among the treatments. The values of IVDMD and IVOMD ranges were from 772.0 to 802.0 and 761.0 to 798.0 g kg-1 DM, respectively. Both yields and chemical compositions of Moringa foliage and leaf suggest that the optimum cutting interval was 8 weeks in rainy season from mature Moringa tree. These data suggest that the higher CP and lower fibre value in the leaf indicate a good protein source for poultry or other monogastric animals and Moringa foliage could be a potential protein source for ruminant livestock

AN ENGINEERING GEOLOGICAL ANATOMY OF THE PADMA RIVER BANK FAILURE AND EROSION, 2018: A CASE STUDY OF NARIA BANK SECTION, BANGLADESH

The Naria town of Bangladesh is developed on the right bank of the Padma River. The bank is an old natural levee of Meghna River. The Holocene-Recent geology of Naria is actively dominated by the fluvial processes of Ganges-Brahmaputra-Meghna River system where the deltaic sediments are characterized as unconsolidated fine sand and silt, covered by thin veneer of clayey silt and loam. The annual volume of water discharge and flow dynamics are dependent on the intensity of the rainfall, runoff and the length of dry winter. Excessive river bank erosion, channel avulsion, renewed submergence of floodplains, and formation of natural levees and channel-bars are due to natural geomorphological processes that impact the area by inevitable ground failures. The geological attributes of ground condition and drastic variations in water levels make the area extremely vulnerable to severe bank failures and erosion. A unique erosion phenomenon prevailing in this part of Bengal delta prompted this study. During Aug-Sept, 2018 a sudden complex attenuation of current, wave and vortex in the Padma water flow caused an extraordinary disaster and made more than 5000 people homeless overnight by devouring away houses including concrete buildings, factories and markets. It is observed that geologically the Padma River remained confined within a width of 5 miles striking NW-SE trend following the margins of older alluvium and Faridpur Trough. The river tends to a meandering pattern consisting of deep vertical trenches along the Naria curvature. The deep trenches form along right bank and render the ground increasingly more vulnerable to subaqueous slope failure due to presence of thick (~200 ft.) alternating cross-bedded silt and micaceous fine sand of very high dilatancy and low angle of friction. The present study identifies some application of technological advancement for developing real-time engineering geological mapping systems for monitoring and managing complex river bank erosion. Large scale 3D engineering geological map coupled with air-borne photogrammetric and radar inferrometry methods can be applied for real-time monitoring and prediction of differential settlements, subaqueous failures and ground movement. The point cloud maps developed using data from these systems can refine engineering geological maps for decision makers and improve the design of protective measure and sustainable engineering structures

Participatory and Institutional Approaches to Agricultural Climate Services: A South and Southeast Asia Regional Technical & Learning Exchange

In order to share experience and boost capacity in agricultural climate services, a three-day workshop titled ‘Participatory and Institutional Approaches to Agricultural Climate Services Development: A South and South East Asia Regional Technical and Learning exchange” was held between September 17-19, 2017, in Dhaka, Bangladesh, with more than 50 leaders in agricultural climate services from 11 countries attending. The workshop was sponsored by the U.S. Agency for International Development (USAID) behalf of the Climate Services for Resilient Development (CSRD). The workshop was organized by the International Maize and Wheat Improvement Center (CIMMYT) alongside the SERVIR and Climate Services Support Activity and CSRD South Asian partners