Assignment Essay Example | Topics and Well Written Essays - 500 words - 79

Assignment - Essay Example There are various procedures in which the court martial deals with cases especially those relating to criminal cases of a military officer. After an offense is committed by an officer, the case can be reported by anyone to the accused’s immediate commander as soon as possible. After one confinement, one is subjected to three types of pre-trial restrictions such as order of severity, confinement, and apprehension. The accused is then arrested or apprehended either through an order, orally or in written from by competent authority that also directs the accused to remain within certain specified limits. Service members in military, relish analogous rights secured by the statute and executive order, a military law gives the defendant, the right to counsel before a special or general court martial or an Art. 32 investigations. At the Supreme Court decision made was that there was no constitutional right to the counsel in summary courts-martial. Usually in special courts-martial, any accused has the right to; military counsel of his/her selection at government expense if available. Civilian counsel of his choosing, allotted military counsel at the Government expense. Article 38(b), 10 U.S.C. Â § 838(b). For multiple defendant cases, discrete counsel is appointed for each defendant to avoid any problem of conflicts of interest. Article 38(b)(4), 10 U.S.C. Â § 838(b)(4). For the accused who decides to choose a civilian counsel he/she is also entitled to appointed military associate counsel. Article 38(b)(4), 10 U.S.C. Â § 838(b)(4). The right to counsel does not only apply at trial, but also at pretrial investigations. This may also take place during depositions, and upon the appeal. Under article 70, the practice of appointing new counsel during appeal insures a renewed look at trial errors and competency of trial defense counsel. An appointed counsel must also meet the following competency; the counsel must be of typical competency in identifying legal

Separation Strategies for Isoprenoids from Aqueous Solutions Term Paper

Separation Strategies for Isoprenoids from Aqueous Solutions - Term Paper Example The simplicity, cost and energy efficiencies as well as the separation capability of solvent extraction, make it the best among these techniques. Introduction Found in all classes of living organisms, isoprenoids are the largest and a diverse group of biomolecules. Also known as terpenoid, isoprenoids are derived from five-carbon isoprene units (2-methyl-1,3-butadiene) assembled and modified in thousands of ways (Encyclop?dia Britannica). In isoprenoids, two to thousands of the isoprene units, through one or neither of its double bonds, are linked into larger molecules to form linear or ring structures. As biomolecules, isoprenoids play a wide variety of roles in plant and animal physiological processes and as intermediates in the biological synthesis of other important biomolecules. The flavors, fragrances of essential oils and other plant-derived substances are due to these molecules. Geraniol, an isoprenoid, is a contributor to the fragrance of rose perfume. These molecules are al so extracted from plants or chemically synthesized to be used as pharmaceuticals (e.g. taxol, bisabolol, lycopene, artemisinin), animal feed supplements and food colorants (various carotenoids) For instance, lycopene is the red pigment in tomatoes while carotene, an isoprenoid and precursor of vitamin A, is responsible for the pigment in carrots. Given the biological importance and applications of these molecules, numerous chemical techniques have been developed for their isolation from their natural sources, which inevitably contains some amount of water. Conventional separation techniques such as distillation, fractional distillation, stream distillation, crystallization, solvent extraction, enfleurage, and chromatography are used. The chemical and physical properties of the compound as well as its abundance and distribution in nature, influenced the choice of technique. For instance, while volatile and plentiful isoprenoids such as turpentine are isolated by distillation of oleor esins, extremely rare compounds such as insect’s hormones are separated from the substrate by chromatography. Currently, fundamental research has been directed towards extraction of these molecules from their natural source by bioaccumulation in microorganism, from which these isoprenoids can be extracted (Clark, Maury and Asadollahi 29). This article seeks to discuss the various conventional and emerging separation techniques used for the separation of isoprenoids from aqueous substrate. This discussion will include overview of the underlying principle involved in the process, design considerations with respect to the technique, fundamental challenges associated with the technique and suggestion of the best technique with respect to performance, safety, cost, and energy efficiency. In addition, specific applications of the best technique will be given. Conventional separation techniques for the isolation of isoprenoids Conventional technologies employed include, simple disti llation, fractional distillation, stream distillation, vacuum distillation, solvent extraction, crystallization, and chromatographic techniques. Simple distillation Distillation involves the conversion of a liquid into vapor and the subsequent condensation of the vapor to back to liquid form. Distillation, as performed in the industry or laboratory is based differences in their volatilities (boiling point) of the mixture. Thus distillation is a physical separation process, and not a chemical reaction.