Archive for August, 2008
By Lyndsay Moss
INJECTIONS of vitamin C could halve the growth of cancerous tumours, research suggested yesterday.A study in the United States found that the vitamin could prove useful in treating cancers for which few other options currently exist.The breakthrough, which comes following tests on mice, follows decades of research into the potential of vitamin C in Tackling Cancer.
However, experts warned that the benefits of the vitamin had yet to be demonstrated in human patients. For the latest study, researchers from the National Institutes of Health in Bethesda, Maryland, examined the effects of vitamin C on cells grown in laboratories. Two hours of exposure to the vitamin significantly cut the survival of ovarian, pancreatic and brain tumour (glioblastoma) cancer cells.
Similar results were seen when cancer-ridden mice were injected with vitamin C. The therapy halved the growth of aggressive tumours, killing cancer cells while leaving healthy tissue unharmed.
It is thought the discovery could provide a new lifeline for patients with a poor prognosis and few other options.
Tackling cancer with vitamin C would also have the added advantage of being cheap compared with many of the very expensive cancer treatments.
Usually the body keeps a tight rein on high vitamin C levels in the blood. But the scientists found that the mechanism can be by-passed if the vitamin is injected straight into the blood instead of passing through the digestive system. When this is done it releases the powerful anti-cancer potential of the vitamin, according to the researchers writing in the journal Proceedings of the National Academy of Sciences.
The experiments showed that high levels of vitamin C in the blood generate hydrogen peroxide, which is lethal to tumours. The chemical forms in the spaces between cancer cells, damaging membranes, upsetting metabolism and scrambling the DNA of the tumour.
Even the growth of aggressive cancers was held back in the experiments. But healthy tissues appeared to resist the effects.
The use of high-dose vitamin C as an alternative cancer treatment has a long history dating back to the 1970s. Patients have taken the vitamin both by mouth and intravenously, but with mixed results in scientific trials. For this reason, claims that vitamin C can treat cancer have been dismissed by conventional cancer experts. But the new investigation, led by Dr Qi Chen, may help to start changing attitudes towards this approach.
The scientists said: “Pharmacologic concentrations of ascorbate (the chemical name for vitamin C] decreased tumour volumes 41-53 per cent in diverse cancer types known for both their aggressive growth and limited treatment options.”
Valcent Products Inc.: Initial Data From the Vertigro Field Test Bed Plant Reports Average Production of 276 Tons of Algae Bio Mass On a Per Acre/Per Year Basis
Press Release Valcent
EL PASO, TEXAS–(MARKET WIRE)–Dec 12, 2007 — Valcent Products Inc. (OTC BB:VCTPF.OB – News) –
The Vertigro Joint Venture has released initial test results from its high density bio mass (algae) field test bed plant located at its research and development facility in El Paso, Texas.
During a 90 day continual production test, algae was being harvested at an average of one gram (dry weight) per liter. This equates to algae bio mass production of 276 tons of algae per acre per year. Achieving the same biomass production rate with an algal species having 50% lipids (oil) content would therefore deliver approximately 33,000 gallons of algae oil per acre per year.
The primary focus of the 90-day continuous production test was determining the robustness of the field test bed. Other secondary tests were also conducted including using different ph levels, CO2 levels, fluid temperatures, nutrients, types of algae, and planned system failures. It is important to note that the system has not been optimized for production yields or the best selection of algae species at this time.
The next phase of development will include increasing the number of bio reactor units from 30 to 100 and then continuing a number of production tests that may further increase production as well as initiating various extraction tests. The results released today are in keeping with data previously announced from the Joint Venture’s laboratory proof of concept test bed. Subsequently, the joint venture intends to build out a one acre pilot plant with engineer design work underway at this time.
As a comparative, food crop such as soy bean will typically produce some 48 gallons oil per acre per year and palm will produce approximately 630 gallons oil per acre per year. In addition, the Vertigro Bio Reactor System is a closed loop continuous production system that uses little water and may be built on non arable lands.
Glen Kertz and Dr. Aga Pinowska, who head the research and development program, commented, “This is a major milestone for us as we have demonstrated the robustness of the Bio Mass System with satisfactory production results from a system that has not yet been optimized for algae production, which will become part of the next phase of testing.” They also noted, “We have learned how to produce a very large algal bio-mass under varying environmental and operating conditions in our continuous process photo bioreactors. We believe these initial results are amongst the best achieved to date, and we are confident we can now increase the productivity.”
“We are extremely pleased with the robustness and performance of the Vertigro technology in sustainably producing commercial quantities of algae biomass,” states Doug Frater, Global Green Solutions CEO. “Over the coming months we will further optimize the technology and demonstrate economic algae production for biofuel feedstock purposes.”
The Vertigo system may be a solution to the renewable energy sector’s quest to create a clean, green process which uses mainly light, water and air to create fuel. The Vertigro technology employs a proprietary high-density vertical bio-reactor that produces fast growing algae which may yield large volumes of high-grade algae oil. This oil can be refined into a cost-effective, non-polluting diesel biofuel, jet fuel and other applications. The algae derived fuel may be an energy efficient replacement for fossil fuels and can be used in any diesel powered vehicle or machinery. In addition, 90% by weight of the algae is captured carbon dioxide, which is “sequestered” by this process and so contributes significantly to the reduction of greenhouse gasses.
Valcent: (OTC BB:VCPTF.OB – News) www.valcent.net together with Global Green Solutions Inc: (OTC BB:GGRN.OB – News) (www.globalgreensolutions.com) are each 50% partners in the Vertigro Joint Venture that has developed a pilot plant in El Paso which became operational in March 2007 and is the primary research and development site for the Vertigro technology. Valcent’s primary responsibility is research and initial development with Global Green’s responsibilities including final engineering and commercialization of Vertigro.