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German biologist, Christiane Nusslein-Volhard is renowned for elucidation of the genetic control of embryonic development of fruit flies. Her contribution earned her the Nobel Prize in Physiology or Medicine, together with American geneticists Eric Wieschaus and Edward B. Lewis. Throughout this paper I will detail the early career of Dr. Nusslein-Volhard and the ways in which her research helped to revolutionize the field of developmental biology as it pertains to embryonic development and gene analysis/function.

Academic background

Christiane Nusslein-Volhard was born on October 20th, 1940 in Magdeburg, Germany. As she grew, she developed interest in studying plants and animals and inclination Continue reading...

Experiment 1 (Drilling Fluid Mud Density)

Definition: The drilling fluid term refers to the technic used for facilitation of drilling boreholes, and to improve all necessary functions needed for a fine drilling.

Results:

Results:
(The weight of Mud *0.052)= Gradient of Mud in psi/ft.
(The weight of Mud in lb/ft3)/144=mud gradient in psi/ft.

Water:

(Mud gradient) 8.3*0.052 =0.432 psi/ft.
(Mud gradient) 64/144 =0.044 psi/ft.

Mud sample No1:

(Mud gradient) 9.13*0.052=0.475 psi/ft.
(Mud gradient) 69/144=0.480 psi/ft.

Mud sample 2:

(Mud gradient) 10*.052=0.520 psi/ft.
(Mud gradient) 76/144=0.530 psi/ft.

Calculation: For calculation of the Density and Mud gradient, the following formulas were used.

Density= (lb/gal)/ 8.345.
Mud gradient= (lb/gal)/ 19.24.

Volume and mass

Density:
Fresh Water: 8.3/8.345 = 1.0 (S.G)
Mud sample1: 9.13/8.345=1.1 (S.G)
Mud sample 2: 10/8.345=1.20 ( Continue reading...

ID Number

ABSTRACT

Continuum mechanics is a combination of physical laws and mathematics that estimate the behavior of matter that is prone to mechanical loading. The basic equations involved in continuum mechanics may be formed in two distinct but fundamentally parallel formulations. In continuum mechanics, deformation is the transformation of certain bodies or objects from a reference shape to a present shape. This paper explores the different types of deformation in continuum mechanics.

Keyword: continuum mechanics, deformation, stretch, rotation, strain, physics laws, mathematics

INTRODUCTION
The examination of the mechanical and kinematic characteristic of materials demonstrated on the continuum postulation is termed as continuum mechanics. Continuum mechanics is divided into two Continue reading...

Introduction

Body cells are surrounded by plasma membrane that controls the movement of substances into and out of the cells. Plasma membrane is a semi-permeable. Consequently, it can only allow certain substances to move across it into the cells or out of the cell. Three main processes are involved in the movement of substances across the plasma membrane: diffusion, active transport, and osmosis. Diffusion refers to the movement of molecules down a concentration gradient (Chiras, 1999). However, there are two main types of diffusion: Simple and facilitated diffusion. In simple diffusion, molecules pass through the semi permeable membrane without assistance. Continue reading...

CourseProfessorInstitutionDate

ENERGY AUDIT FOR A RESIDENTIAL HOUSE
Introduction
Energy conservation is desirable for both economic and environmental reasons. Efficient energy use reduces the energy drawn from the mains. Reduction of the power load per home means that the utility company will have to supply less power to the residential estates. The utility company in turn will undertake less carbon emitting energy production activities. Efficient energy use will reduce the carbon footprint of individual residential houses and the utility company. Reduction of toxic emissions will decelerate air pollution, which leads to global warming that causes a rise in sea levels due Continue reading...

Q1
The investigator wants to approximate which treatments between A and B is effective in decreasing cholesterol levels. The study uses the hypotheses tests detailed below
H0 – The effect of treatment A in reducing cholesterol levels is equal to the effect of treatment B. That is µA - µB = 0
HA – The effect of treatment A in reducing cholesterol levels is not equal to the effect of treatment B. That is µA - µB ≠ 0.
Q2
The paired samples t-test is utilized in the estimation of the statistical significance of the difference in the means. The pooled t-test is Continue reading...

Results

Data
The following tables and graphs show the data of the experiment:
y=2.01E+4x-7.31E-02
Figure 1: Beer’s law graph generated from the data of part 1 of the experiment

Sample Calculations

Concentration of the sample containing 5.0mL dye solution (C2).
C1V1=C2V2
In the above formula, C1 and V1 represent the concentration and volume respectively of the first sample of the Indigo Carmine dye solution whose absorbance was measured (4.0mL dye solution). On the other hand, C2 and V2 represent the concentration and volume respectively of the 5.0mL dye solution sample.
7.1E-05*4.0=C2*5
28.4E-055=C2
C2=5.68E-05

The value was truncated to 2 significant figures to obtain 5.6E-05M

Concentration of the 7.0mL dye Continue reading...

Introduction

According to Dembe et al., (2005), established working in jobs which had an overtime plan was associated with an increased chance of injury rate when compared to jobs that had no overtime plan. Specifically, working for 12hours per week was associated with a 37% increase in the injury rate. Although long working hours are associated with an increase in the exposure of the employee to the risk of work-related injuries, it has been established that long working hours significantly affects the wellbeing of employees.
In an analysis that consisted of 110,236 job records, the article proved that long Continue reading...

PROPOSAL

Reg.No.

Experiment About Properties of Fluids

The topic of the experiment is: Study of the Viscosity of Liquids
Introduction
Some liquids flow easily while others are sticky and have difficulty flowing. This is due to a property known as viscosity and vary among liquids. For example, less viscous fluids flow easier than highly viscous fluids. As such viscosity can be used to tell the resistance of fluid to motion. Higher viscosities imply greater resistance to fluid motion. A velocity gradient is produced when layers of a fluid mover over another layer. The resulting velocity gradient is proportional to the applied shear stress. The constant Continue reading...

The sun is known as the greatest provider of energy to earth. The main two main forms of energy produced by the sun are heat and light energy. For many years, scientists were puzzled by the working mechanism of the sun. Questions were asked regarding how the sun produces the vast amount of heat and light energy that supports and indeed sustains the life on earth. Scientists and experts in various fields of study provided different theories about the production of heat and energy by the sun and some even clashed with each other. For example, there were constant Continue reading...