micrometers etc BITS Pilani‚ Pilani Campus The Mechanics of Power Screws square-threaded power screw single thread Mean diameter ‘dm’ pitch ‘p’ lead angle ‘λ’ helix angle ‘ψ’ loaded by the axial compressive force ‘F’ Helix angle: Angle that thread makes with plane perpendicular to thread axis Lead angle : Angle between the helix and a plane of rotation BITS Pilani‚ Pilani Campus FBD of one thread‚ (a) raising and
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environment by the nuclear membrane. The genetic material is packaged with proteins known as histones of which there are 5 ; H1 H2A H2B H3 and H4. The DNA and octamer of histones forms a nucleosome. The first level of packing reduces the entire double helix DNA by a third of its length. The further packing of DNA forms solenoid fibres which then form chromatin which packs into a chromatid. Chromosomes have four chromatids. Each chromosome is 1400nm in diameter. Unlike eukaryotic genes prokaryotic genes
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Gattaca supports the belief that nature is preferable to an error-free genetically engineered existence. Andrew Niccol’s Sci-fi Thriller‚ Gattaca‚ is a dystopian world where a person’s identity is determined by their genetic quotient. In Gattaca the genetically engineered part of society is viewed as perfect while the naturally conceived are viewed as invalids or “de-gene-rates”. Contradictorily‚ Niccol attempts to demonstrate to the audience that nature‚ with its flaws‚ is preferred over an error-free
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Downtown St. Petersburg‚ Florida is the home of the largest Salvador Dali art collection outside of Europe. The Salvador Dali museum took its first breath on March 7th‚ 1982. This historical building holds 96 oil paintings‚ more than 100 water colors and drawings‚ and 1‚300 graphics‚ photographs and sculptures. This location is also the home of 7 out of 18 masterworks done by Dali. Salvador Dali left an outstanding line of art behind on January 23‚ 1989‚ He actually passed away in his hometown‚ Figueres
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that has a repeating chain of identical five-carbon sugars (polymers) linked together from head to tail. It is composed of four ring shaped organic bases (nucleotides) which are Adenine (A)‚ Guanine (G)‚ Cytosine (C) and Thymine (T). It has a double helix shape and contains the sugar component deoxyribose. THE PROCESS OF DNA REPLICATION How DNA replicates is quite a simple process. First‚ a DNA molecule is "unzipped". In other words‚ it splits into two strands of DNA at one end of the DNA molecule
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CYTOCHROME P450 2S1 Cytochrome P450s (CYPs) are monooxygenase proteins that catalyze the metabolism of exogenous and endogenous substrates. CYPs function as enzymes and are found in all kingdoms of life. The P in P450 refers to pigment and 450nm refers to the wavelength of CYPs in solution exposed to carbon monoxide (CO). CYPs belong to the superfamily of proteins containing a heme (iron) cofactor active site. The heme active site is tethered to the CYP protein via thiolate ligand derived from
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(5) a alpha helix. 2. In prokaryotes‚ most genes are organized into operons. One component of an operon is the structural genes. Which of the following best describes a structural gene? (*) a sequence of DNA that specifies a polypeptide. (2) a sequence of DNA that produces tRNA’s. (3) a sequence of DNA that interacts with the small ribosomal subunit. (4) a sequence of DNA that is recognized by RNA polymerase. (5) a sequence of DNA that is involved in forming the structure of a double helix molecule
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bond) TA GC 2. Nitrogenous bases are attached to a ribose (pentose) sugar lacking one oxygen 3. Sugars with their bases held together in a long string by phosphate (PO4) molecules 4. Whole long ladder-like structure twisted into a double helix A nucleotide
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Lecture 1 Cells of the Nervous System Neuron – in the form of sensory‚ motor and interneurons -> transmit info using electrical signaling Glial Cells – metabolic support‚ protection and insulation for neurons Cell body – contains nucleus‚ other organelles – ex. mitochondria for ATP Dentrites – branches which incoming fibers make connections - receiving stations for excitation or inhibition - covered with short dendritic spines that increase SA - dendrites and their spines are constantly modified
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Week 2 Quiz Which of these is NOT one of the four general categories of cells that make up the human body? collagen cells muscle cell neuron connective tissue cell epithelial cells What is the term for the developmental process that leads to specialized cell types? homeostasis differentiation positive feedback genomics acclimatization If a person begins to sweat upon entering a hot room but continued sweating is able to keep the body temperature constant‚ which of these best
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