High yield organ systems

Part 1 book "First aid for the USMLE Step 1 2023" includes contents: Guide to efficient exam preparation, special situations, high yield general principles, high yield organ systems.

429p oursky01 17-07-2023 4 1   Download

In this study, encapsulation processes of cetyltrimethylammonium bromide (CTAB) or sodium dodecyl sulfate (SDS) monomers into the cavity of β -cyclodextrin (β -CD) were applied to synthesize mono- and bis (indolyl)methylmalononitrile derivatives by a one-pot three-component reaction of an aldehyde, malononitrile, and indole in an aqueous solution. These two inclusion complexes proved to be superior to CTAB or SDS individually, as cationic or anionic surfactants, respectively, for accessing high yields of pure products within shorter reaction times.

9p tudichquannguyet 29-11-2021 6 1   Download

A facile synthesis of piperidinium 3,3’-(arylmethylene) bis (2-hydroxynaphthalene-1,4-dione) analogs as organic salts is described by the one-pot pseudo-four-component reaction between 2-hydroxy-1,4-naphthoquinone, aromatic aldehydes, and piperidine. The single-crystal X-ray diffraction analysis of these systems confirms that the stabilized predominant interactions are N-H...O and O-H...O hydrogen bonds.

10p tudichquannguyet 29-11-2021 6 0   Download

A series of cholesterol and based hydrophobic urea and thiourea compounds were synthesized and successfully used as a cocatalyst for L-proline catalyzed aldol reactions in the presence of water. The anticonfigured products were obtained with good yields (up to 94%), high diastereoselectivities (up to 95:5), and high enantiomeric excesses (up to 93% ee). The successful results for catalytic efficiency of L-proline in the presence of water reveal the importance of the hydrophobic nature of cholesterol and diosgenin parts of thiourea on the reactivity and selectivity in the presence of water.

28p tudichquannguyet 29-11-2021 12 1   Download

Continuous use of chemical fertilizers without organic sources poses soil health issues whereas organic manures using alone without inorganics could not be able to fulfill the requirement of high nutrient demanding crops due to the bulk and slow-acting nature of these organic fertilizer sources. However, neither organic fertilizers nor inorganic fertilizers alone can maintain productivity. The major yield limiting factors in crops production in Indian soils are NPS deficiencies.

14p chauchaungayxua10 19-03-2021 16 1   Download

Integration of organic and inorganic sources of nitrogen has been shown to considerably improve rice yields by minimizing nutrient losses to the environment and managing the nutrient supply, and thereby results in high nutrient use efficiency (Kumar et al., 2008, Bezbaruha et al., 2011, Parkinson, 2013).

8p nguathienthan8 20-10-2020 10 2   Download

The agricultural production in sufficient quantities in a sustainable way is the today’s greatest challenge. The sustainable way here means without deteriorating the soil health. In current scenario, the cultivation of high yielding varieties with synthetic fertilizer and agrochemicals helping to produce required food demand of growing population but indiscriminate and imbalanced use of agrochemicals imparting negative effect on soil productivity, environmental health and food quality.

11p angicungduoc6 22-07-2020 14 1   Download

Performance of modern cultivars in terms of yield under organic farming differs from that of conventional system. As the demand for organic rice is increasing, so to maintain high productivity, there is a need to evaluate modern high yielding rice varieties under organic farming systems. Field experiments were carried out using randomized complete block design involving fourteen rice (Oryza sativa L.) varieties including seven coarse and seven fine grain types with three replications under organic farming systems for three years (2013-2015).

5p kethamoi6 29-06-2020 17 0   Download

Rice (Oryza sativa L.) is one of the most important staple food crops worldwide. Nitrogen (N) is the most important nutrient in irrigated rice cultivation. Current high yields of irrigated rice are often associated with applications of higher doses of fertilizer N, as nearly 30-40 percent of applied nitrogen is actually utilized by the crop; even with the best agronomic practices. It has always been a problem to raise the utilization rate of the rice plant and to increase efficiency of absorbed nitrogen for grain production.

16p quenchua6 15-06-2020 14 2   Download

N fertilizers and high yielding varieties were major drivers of the enormous increase in rice productivity during the past 50 years. Despite increasing food production higher nitrogen use also contributed in environmental pollution and Increasing consciousness of conservation of environment and mitigation of climate change brought a major shift in cultivation practices of major crops towards organic agriculture. An important issue regarding the acceptance of organic agriculture is the question of productivity.

19p nguaconbaynhay5 16-05-2020 14 0   Download

Compare and contrast low-grade or indolent lymphomas and high-grade or aggressive lymphomas with respect to underlying pathophysiology that yields specific morphologic features and clinical behavior.

6p caothientrangnguyen 10-05-2020 13 1   Download

Compare and contrast low-grade or indolent lymphomas and high-grade or aggressive lymphomas with respect to underlying pathophysiology that yields specific morphologic features and clinical behavior.

5p caothientrangnguyen 10-05-2020 9 0   Download

Field experiments were conducted in D-2 block of Norman E. Borlaug Crop Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar, Distt. Udham Singh Nagar (Uttarakhand) during 2017-18 and 2018-19. The objectives of the investigation were to study effect of tillage systems and residue loads on the initial establishment, growth attributes and productivity of wheat. The soil of the experimental plot was clay loam high in organic carbon (0.80%), medium in available nitrogen (246.3 kg/ha), high in available phosphorus (22.7 kg/ha) and medium in available potassium (180.

9p cothumenhmong3 22-02-2020 16 0   Download

Production of secondary metabolites from plant tissue culture has emerged as a promising and feasible option attracting the attention of scientists worldwide. Plant cell, tissue and organ cultures offer an attractive alternative for homogeneous, controlled production of secondary metabolites, throughout the year, especially when we take commercial demand into account. They not only facilitate the de novo synthesis of novel compounds, but also are able to produce compounds sometimes even in higher amounts than the intact plants.

9p cothumenhmong1 08-12-2019 16 0   Download

Major rice-wheat growing soils of Upper Gangetic Plains, India were studied and evaluated by considering soil-site characteristics by using qualitative and quantitative methods. The qualitative method employed were USDA land capability classification and land suitability classification, while the quantitative evaluation method includes Riquier's parametric approach. The land evaluation methods indicated that information on production potential of soils provide a basis for comparison among different soils.

12p nguaconbaynhay1 04-12-2019 27 0   Download

Bixa orellana commonly known as annatto is one of the oldest known natural dye yielding plants native to Central and South America. Various parts of annatto have been widely used in the traditional medical system for prevention and treatment of a wide number of health disorders. The plethora of traditional uses has encouraged researchers to identify and isolate phytochemicals from all parts of this plant.

16p kequaidan1 16-11-2019 18 3   Download