Nanoparticles are defined as particulate materials with at least one dimension of less than 100 nanometers (nm), even the particles could be zero dimension in the case of quantum dots (Bar et al., 2009). Metal nanoparticles have been of great interest due to their distinctive features such as catalytic, optical, magnetic and electrical properties (Rassaei et al., 2008).
Nanoparticles present a high surface area to volume ratio with decrease in the size of the particles. Specific surface area is relevant to catalytic activity and other related properties such as the antimicrobial activity (Bae et al., 2010). As the specific surface area of nanoparticles is increased, their biological effectiveness will also increase on the count of a rise in surface area (Mukunthan et al., 2011). Nanoparticles of noble metals, such as silver, gold and platinum are widely applied in products that directly come in contact with human body, such as shampoos, soaps, detergents, shoes, cosmetic products and toothpaste, besides medical and pharmaceutical applications (Mukunthan et al., 2011).
Catharanthus roseus, commonly known as the Madagascar periwinkle, is a species of Catharanthus native and endemic to Madagascar. Other English names occasionally used include Cape periwinkle, rose periwinkle, rosy periwinkle, and "old-maid".
It is an evergreen subshrub or herbaceous plant growing to 1 m tall. The leaves are oval to oblong, 2.5–9 cm long and 1–3.5 cm broad, glossy green, hairless, with a pale midrib and a short petiole 1–1.8 cm long; they are arranged in opposite pairs. The flowers are white to dark pink with a darker red centre, with a basal tube 2.5–3 cm long and a corolla 2–5 cm diameter with five petal-like lobes. The fruit is a pair of fol...
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HT-29 is a colorectal cancer cells. Colorectal cancer was the second most common cancer after breast cancer. It is reported to be the first among male and also second among female in Peninsular Malaysia. A total of 2,866 cases were registered with NCR in 2006 and represent 13.2 % of all cases registered. The incidence of colorectal cancer in Peninsular Malaysia increased with age with the overall ASR was 18.4 per 100,000 populations. Thirty percent of the patients have advance disease at presentation, either locally or at distant sites. In this setting, chemotherapy remains the only viable therapeutic option. However, this option also was severely slowed down by the metastatic colon cancer that is resistances to many currently used anticancer agents. Therefore, it is very crucial to develop a new potential therapeutic product for the purpose of treating cancer.
Background and objective. Tumor heterogeneity is shown to be related to clinical outcome in cancer patients. The concept of a small subset of cancer stem cells being responsible for tumor relapse and metastasis comes out as a promising strategy for targeted cancer therapy. However, cancer stem cells are not easy to identify and isolate. The aim of this study was to determine the putative colon cancer stem cell subsets in human colon cancer cell lines HCT116 and HT29, which differ in their aggressiveness and differentiation capacity. Material and methods. Flow cytometry was used to asses HCT116 and HT29 cell lines for the expression of stemness-associated surface markers CD24, CD44, CD117, CD133, ESA, ABCB1. Both cell lines were treated with 5-fluoruracil and the phenotype of chemoresistant cells was investigated. Side population was visualized via Rhodamine 123 staining. Relative expression of ABCG2, c-Myc and Oct4 genes was quantified using qPCR analysis. Results and conclusions. It was shown that HCT116 and HT29 cell lines differ in their stemness-related properties. We imply that putative CSC subset for HCT116 cell line is CD44+/CD24-/CD133- (4,1% of all cells) and for HT29 cells – CD24+/CD44-/CD133- (4,9% of all cells).
Amandi Hiyare: Before forming my research question, I had a discussion with my research project coordinator “Lisa Pope” who told me that the Flinders nanotechnology research team has been developing microbial catheters. Then on Monday I had an interview with Professor Joe Shapter who told me that your team was leading this project. So I was wondering whether you would be able to provide me with some detailed information about this innovation?
Fruiting heads often remain on trees over winter. Fair seed crops occur every year and bumper crops about every 3 years. The staminate and pistillate of Sweetgum is monoeciouse. The small, greenish flowers bloom from march to early May, depending on latitude and weather conditions. Both the staminate and pistillate flowers occur in heads. The staminate inflorescences are racemes; the solitary pistillate flowers are globose heads that that form the multiple head, 2.5 to 3.8cm in diameter, of small, two-celled capsule. The lustrous green color of the fruiting heads fades to yellow as maturity is reached in September to November. The beaklike capsules open at this time, and the small winged seeds, one or two per capsule, are then readily disseminated by wind. However, the seed balls can be safely collected for seed examination several weeks before ball discoloration occurs without harming the seed. Empty flowers are quit sensitive to cold and often damaged by frost.
This plant has a variety of names through out Montana. This plant grows in poor soil composing mostly of sand or gravel and is commonly found near Ponderosa Pine trees. Kinnikinnick and Bearberry are the most commonly used names in western society. The word kinnikinnick meaning that which is mixed, is derived from the Algonkian Indian’s language. Other versions came from western hunters who called it larb, Canadian traders called it sacacommis or sagack-homi, and the Europeans called it bearberry.
Description: A hardy medium to tall shrub bush part of the rose family. The Rosaceae is a very large plant family that includes the apples, plums, cherries, and roses (St-Pierre, 1991). There are at least 10 species of Saskatoon berries and it is hard to tell them apart. The morphology of the shrub is highly variable and can have different factors based on age, location, and underground stem location. It usually grows to shrub size and can be differentiated by the leaves, the flowers, and berries that grow on it (Brooke, 1988).
Almost everyone is touched by cancer in some way and the number of people living with and beyond cancer grows greater every year. Globally 14 million people are diagnosed with cancer each year and 8 million people will die from it annually. Half of all men and one-third of all women will develop cancer during their lifetime. (13) There are many treatments for cancer, mainly: surgery, radiation and chemotherapy. These traditional treatments have many negative side effects. Therefore, increasingly, other treatments, such as hormonal therapy and targeted therapy are being used for certain cancers. Nanotechnology is a form of targeted therapy that destroys cancer tumors with minimal damage to healthy tissues and organs. Scientists are already using nanotechnology in early detection of elimination of cancer cells before they form tumors. But the real game changer will be when nanotechnology targets cancer tumors in treatment (11,13).
Cancer is one of the leading causes of death worldwide as it can develop in almost any organ or tissue. Significant advances in understanding the cellular basis of cancer and the underlying biological mechanisms of tumour has been vastly improved in the recent years (Jiang et al. 1994). Cancer is a genetic disease which requires series of mutation during cell division to develop, it has characteristics which can be associated with their ability to grow and divide abnormal cells uncontrollable while in the mean time invade and cause nearby blood vessels to serve its need. Even though many people are affected by cancer today, the abilities which cancer cells own make it hard to find single effective treatment for cancer. The focus of research now lies on developing drugs which target cancer cells in the hope to cure cancer once and for all.
“Since 1990, over 6 million Americans have died of cancer, more than the combined casualties from the Civil war, WWII, and the Vietnam and Korean conflicts combined” (Faguet, p. 5). According to American Cancer Society projections, there were 1,529,560 new cases of cancer in 2010. Cancer is becoming more and more common around the world. New cancers are constantly being discovered. Researchers are finding new ways to detect cancer and treat it so that the fatality rate does not rise. However, there are some cancers that researchers have not yet discovered a cure for. It is very important for Cancer Research to continue so that one day these cancers will no longer be a treat.
The delicate-looking tree ranges from 10 to 50 feet in height. Its bark is thin, smooth and light brown in color. It resembles a fern with it had fernlike leaves. The leaves are bipinnately and are about 7 inches in length and 3
A perennial bulb , with around 2 to 4 glossy green lanceolate leaves and a single mauve to pink flower on the top of the stem
Asphodelaceae is a distinct family from other liliod monocot groups by a combination of several morphological and reproductive features: simultaneous microsporogensis, atypical ovular structure, lacking steroidal saponins, producing seeds with arils, and the general presence of anthraquinones. Basic morphological features of genera within the Asphodelaceae consist of mostly herbs, shrubs, and sometimes arborescent, which grows into woody forms with trunks that can grow up to several meters high. The leaves are arrangement is alternate, spiral or 2-ranked that usually form rosettes at base or ends of the branches. The leaves are often thick and succulent with parallel venation. The succulent aloes vary in size and morphology from the dwarf rosettes (Adams et al. 2000). Vascular bundles are arranged in rings around mucilaginous parenchyma tissue, the bundles have parenchymatous aloin cells in inner bundle sheath near the phloem poles. The association of aloin cells and central gelatinous zones are synapomorphic for species with Alooideae (Judd et al. 1999). The perianth is usually bisexual and showy, with 6 distinct to strongly connate, non-spotted tepals. Reproductive flower parts have 6 distinct stamens and 3 connate carpels and a superior ovary that contain nectaries in septa.
Klitgård, B.B. & Lewis, G.P. (2010). Neotropical Leguminosae (Mimosoideae). In: Milliken, W., Klitgård, B. & Baracat, A. (2009 onwards), Neotropikey - Interactive key and information resources for flowering plants of the Neotropics.http://www.kew.org/science/tropamerica/neotropikey/families/Leguminosae_(Mimosoideae).htm.
Cotton is an annual, biennial or perennial plant, but in cultivation it is generally treated as an annual; herbaceous to short shrub or small tree - two to six feet tall. It consist of a primary axis, erect and branched with a vegetative lower zone having monopodial branches, and a fruiting upper zone with sympodial branches. The leaves of the cotton plant alternate, cordate petiolate, three to nine lobed and palmately veined, with varying size, texture, shape and hairiness. The large, showy, cream yellow, red or purple flowers are extra axillary, terminal, solitary, and borne on sympodial branches. The calyx (= collectively the sepals) consists of a very short cup-shaped structure at the base of the corolla. The five petals of the corolla are either free or slightly united at the base of the convoluted bud (Sundararaj, 1974).
The main purpose of green nanotechnology has been to develop clean technologies that would minimize potential human and environmental health risk. Also, to encourage replacement of existing products with the clean technologies that is more environmentally friendly. There are many benefits of using green nanotechnologies as the new solution for energy in both their current availability and their current development. Over the new few decades, the highest growth opportunities will come from application of nanomaterials for making better use of existing resources. Nanotechnologies will help reduce weight of carbon emission in transportation utilizing nanocomposite materials that quickly diffuses across the automotive and aerospace industries. Applications of nanotechnologies will result in a global annual savings of 8000 tons of carbon dioxide, which will rise even further to over millions tons by 2020. But, let’s focus on the positive effects of Green Nanotechnology in Solar.
I have chosen nanotechnology as my topic area of choice from the food innovation module.