Hydrogen gas is thought to be the ideal fuel for a world in which air pollution has been alleviated, global warming has been arrested, and the environment has been protected in an economically sustainable manner. Hydrogen and electricity could team to provide attractive options in transportation and power generation. Interconversion between these two forms of energy suggests on-site utilization of hydrogen to generate electricity, with the electrical power grid serving in energy transportation, distribution utilization, and hydrogen regeneration as needed. A challenging problem in establishing H₂ as a source of energy for the future is the renewable and environmentally friendly generation of large quantities of H₂ gas. Thus, processes that are presently conceptual in nature, or at a developmental stage in the laboratory, need to be encouraged, tested for feasibility, and otherwise applied toward commercialization.

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Giardia lambia is a parasitic protozoan that cause Giardiasis, more commenly known as beaver fever with symptoms such as diarrhea, abdominal pain and weight loss. It spreads through cyst which will later germinate into tropozoite. This protozoa belongs to the earliest indentified lineage among eukaryotes therefore it offers more insight into progression from primitive to more complex eukaryote.

Morphologically identifiable Golgi complex is observed when it undergoes developmental induction of Golgi enzyme activities when it is differentiated from Giardia trophozoites to cysts.

However, prior to the induction, there is no morphological and biochemical identifiable Golgi complex exist in the non-encysting cell. 

Protein secretion of both encysting and non-encysting trophozoite can be inhibit by brefeldin A and B-COP. It resemble the secretory mechanism in higher eukaryote, the Giardia even when Golgi complex is absent in non-encysting trophozoites.

Peroxisome play a critical role in a variety of metabolic processes. 

 Including fatty acid oxidation, ether phospholipid biosynthesis, peroxide and ROS metabolism, glyoxylate clearing, catabolism of purines, polyamines, prostaglandins and eicosanoids, and possibly the biosynthesis of isoprenoids. 

Fatty acid oxidation in peroxisomes is a heat-generating process because peroxisomes lack a respiratory chain, and the peroxisomal FAD-linked oxidases donate their electrons directly to molecular oxygen to produce H2O2. 

 

 Besides their important role in the oxidation of fatty acids, peroxisomes are required for the biosynthesis of important ether phospholipids, such as plasmalogens (ether phospholipid characterized by the presence of a vinyl ether linkage at the sn-1 position and an ester linkage at the sn-2 position.) 

Inherited disorder of peroxisome in humans, so called peroxisomal disorders 

A defect in a peroxisomal gene can lead to a single enzyme deficiency which might affect one specific peroxisomal function or metabolic pathway. 

Organs affected in most peroxisomal disorders include brain, spinal cord, or peripheral nerves, eye, ear, liver, kidney, adrenal cortex, Leydig cells in testis, skeletal system, and in some instances cardiovascular system, thymus, and pancreas 

Example 

The fatal cerebro-hepato-renal syndrome of Zellweger (ZS), a developmental disorder 

 ZS patients usually die within their first year of life, and suffer from neonatal hypotonia, craniofacial dysmorphy, hepatomegaly, renal cysts, adrenal atrophy, and profound neurological abnormalities, such as dys- or demyelination and neuronal migration defects