10/19/2018

Personalized Perfume 

There is a new trend is selecting the right fragrance for someone you love known as personalized perfume. The personalized perfume sites offer to create a fragrance based on your loved one's personality and then create a customized blend just for them.


ABSTRACT Bacterial biofilms are sessile communities with high cell density that are ubiquitous in natural, medical, and engineering environments; they are fascinating since they are primitive tissues with an advanced chemical communications network. Currently, there is an explosive amount of biofilm research, most of it with the ultimate aims of biofilm prevention, control, or eradication.The present investigation was aimed to study the cell signaling principle among seaweed epibiotic bacterial organisms , totally 54 bacterial isolates were made out of 20 seaweed species. Among 54 bacterial isolates 17 of them producer, another 17 of them inducer strains rest of 20 isolates were normal that have not showing any signs of activity. The 17 producers and 17 inducer strains were subjected to the cross species induction by quorum sensing principle and found that only 3 of them have responded to the cross species induction in production of antibacterial compound against the respective inducer strains. All the 3 producers and inducer were identified by biochemical analysis and surprisingly that all the 3 producer strain belongs to Genus Pseudomonas and inducer strains were belongs to Genus Vibrio. The supernatant obtain from mixed culture of Pseudomonas & Vibrio shows the antibiotic activity against the various Vibrio species which were isolated from other sources. Such as Vibrio from primary film, Vibrio from sediment Vibrio from seaweeds epibiotics. The obtain results clearly shows the particular Pseudomonas from seaweed epibionts has the capability of producing potential antibiotic compound against wide range of Vibrio species through quorum sensing.
 




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Allison, D. G., B. Ruiz, C. Sanjose, A. Jaspe, and P.Gilbert. 1998. Extracellular products as mediators of the formation and detachment of Pseudomonas fluorescens biofilms. FEMS Microbial Lett. 167: 179-184.

Personalized perfume is all over the internet and any search engine will produce numerous web sites for ordering this unique and sweet gift. Most sites promise delivery in about seven to ten business days. The fragrance comes bottled in personalized packaging, adding to the special flair of thinking only about the recipient.

All the above mentioned biochemical tests were performed by following standard methodology given in the Microbiological Laboratory Manual by James 3.Cappuccino (1999).

Bassler, B. L., E. P. Greenberg, and A. M. Sterens. 1997. Cross species induction of luminescence in the quorum - sensing bacterium Vibrio harveyi. J. Bacteriology. 179: 4043-4045.

The collected seaweed samples were thoroughly washed with sterile seawater to removes the loosely attached bacteria/particles. Seaweed fronds were scrubbed with sterile cotton swabs to obtain epiphytic bacteria. Epiphytic bacterial organism in the swab were inoculated in sterile peptone broth (50% sea water) and incubated at 28??C in an incubated shaker (220 rpm / min) for overnight. After the incubation period the enriched cultures were serially diluted up to 10-8 concentration and 200 microlitre of each diluted samples were transferred into the nutrient agar plate (50% sea water). The plates were incubated at 28??C for 5 days and the plates with crowded colonies were selected. In the crowded plates those colonies, which showed the sign of inhibition zone around its margin to the neighboring colony, were selected and considered as producer strain. The neighboring sensitive colonies were treated as inducer strain. Both producer and inducer strains were streaked repeatedly until to get pure culture. The pure culture were properly labeled and subjected to the quorum sensing analysis.

Seaweeds itself secretes secondary metabolites to prevent fouling and grazing. In addition to that epibiotic bacteria on macro algae can also produce antifouling compounds that work in concert with the seaweed derived compounds to protect the seaweed surface. Recent studies have highlighted important roles of epibiotic bacteria colonizing the surface of seaweeds and releasing antifouling compounds. For the past 50 years antibiotics have revolutionized medicine by providing cures for formerly life threatening diseases. However, strains of bacteria have recently emerged that are virtually unresponsive to antibiotics such multidrug resistance, arising mainly through antibiotic misuse, is now recognized as a global health problem. In this situation, it is clear that new classes of antibiotics are urgently needed. Many marine bacteria have been shown to produce secondary metabolites that display antibacterial properties. The first antibiotic from a marine bacterium was identified and characterized in 1966. In addition, bacteria in biofilm on the surface of marine organisms have been documented to contain a higher proportion of antibiotic producing bacteria than some other marine environments (Burgess, et al., 1999). Marine epibiotic bacteria, associated with nutrient-rich algal surfaces have also been shown to produce antibacterial secondary metabolites which inhibit the settlement of potential competitors. Recently a lot new novel antibiotics such as Phenazine, thiomarinol, phenazine-1-carboxylic acid, 1-hydroxyphenazine 2-n-heptylquinol-4-one, 2-n-nonylquinol-4-one pyolipic, loloatins, agrochelin, sesbanimides, pelagiomicins, indomycione and indomycione have been identified from various marine epibiotic bacterial organisms. In particular, some species of the genus Pseudomonas produce both antibiotics and several other bioactive substances. For example, Pseudoalteromonas rubra and Pseudoalteromonas aurantia have been reported to be antibiotic producing bacteria. The phenomenon of higher organisms utilizing their associated microflora for the production of beneficial secondary metabolites is common in the marine environment (Yotsu, et al., 1987). A study of bacteria isolated from marine algae surfaces indicated that the incidence of antibiotic producing strains from this habitat was 20% whereas that from sea water was only a few percent. In addition, some bacteria that previously did not produce any active compounds have been found to be producing such metabolites when they are exposed to other bacterial species or extra cellular chemical from other bacteria. Bacteria may also produce antimicrobial compounds when they sense the presence of competing organisms. However, few attempts have been made to study such chemical communication between different bacterial species or how this might affect. The secretion of antimicrobial compounds (Mearns-Spragg, et al., 1998). Bacterial communication by the chemical signals for specific function is simply known as Quorum sensing. In which a bacterial population receives input from the environment and elicits an appropriate response (Hiroaki and Kristina. 2003). The term "quorum sensing" describes the ability of a microorganism to perceive and response to diffusible signal molecules. Bacterial cells sense their population density through a sophisticated cell to cell communication system and trigger expression of particular genes. Tne first system of density-dependent regulation was studied in detail with the luminescence of Photobacterium fischeri (formerly known as Vibrio fischeri) by Bassler et al., 1997. Eventually, they discovered that 3-oxo-N-(tetrahydro-2-oxo-3-furanyl) hexanamid or N-3-(oxohexanoyl) homoserine lactone (OHHL) was responsible the agent in the broth that induced luminescence. Followed by this many researchers have confirmed that in Gram negative bacteria acyl-homoserine lactone is responsible for the cell to cell communication system.

GcA-, GcB-, GcC-, GcD- GcE-, GcF- Gracillaria edulis U1-, U2-, U3-, U4- Ulva lactuca SA- Sediment

All the cultures were incubated at 28??C for 5 days. After the incubation period the cultures were centrifuged at 10,000 rpm for 15mins. The supernatant was collected and subjected to antibacterial assay with respective inducer strain.

Bainton, N. J., P. Stead, and S.R. Chhabra. 1992. N-(3-oxohexanoyl)-L-homoserine Lactone regulated carbapenem antiobiotic production in Erwinia carotovora. Biochem. J. 288: 997-1004.

The main question of what pheromones are is answered by the idea that a pheromone is used to attract one sex to another. A pheromone is a substance that is secreted by the body primarily for the purpose of mating. The female attracts the male of the same species by putting out just the right pheromones to bring him to her.

Hypnea valentiae Rhodophyceae Hypnea pannose Rhodophyceae Hypnea esperi Rhodophyceae Acanthophora spicifera Rhodophyceae ISOLATION OF EPIPHYTIC BACTERIA

Mckenney, D., K. E. Brown, and D. G. Allison. 1995. Influence of Pseudomonas aeruginosa exoproducts on virulence factor production in Burkholderia cepacia: evidence of interspecies communication. J. Bacterial 177: 6989 - 6992.

Colony morphology, Gram staining, Motility test, Oxidase test, Catalase test, Indole Production, Methyl red test, Voges Proskauer test, Citrate Utilization test, Triple sugar Iron test, Nitrate reduction test, Lactose fermentation, Urease test

Mearns - Spragg, A., K. G. Boyd, and M. O. Hubble. 1997. Antibiotics from surface associated marine bacteria. Proceedings of the fourth underwater science symposium. The society for underwater Technology, London: 147 - 157.

GcD- GcE- GcF- NIL NIL 26 NIL NIL NIL Ulva lactuca 13. U1+ 14: U2+ 15. U3+ 16. U4+ U1-

In the present investigation, it was aimed to produce the antibiotics from the seaweed epibionts through quorum sensing principle. The bacterial isolates of seaweed epibionts were identified as species of Pseudomonas and Vibrio from seaweeds Hypnea musiformis and Gracillaria edulis. In this study the Pseudomonas acts as a producer strain and Vibrio as inducer strain. The recent finding says that the seaweed epibionts having potential to control the metabolic activity of competitor organisms. Allison et al., 1998 reported that many bacterial strains up on attaching to a surface produce exopolysaccharides or exopolypeptides. In addition, it has been postulated that exopolysaccharides could mediate the attachment of the bacteria to the surface and induce metabolic changes.

Patterson, G. L., and C. Ml. Bolis. 1997. Fungal cell - wall poly sacchraides elicit an antifungal secondary metabolite in the Cyanobacterium Scytonema ocellatum. J. Phycology. 33: 54 - 60.

In concluding this discussion, the quorum sensing is wider spread among bacterial population then was previously thought, (In Gram positive, Gram negative bacterial communication). Current assays for antimicrobial activities are inadequate because some antibiotic producing bacteria may require the presence of another bacterial species. These findings have important implication for the discovery of novel antimicrobial compounds from marine bacteria and may allow the development of new methods for screening novel compounds active against multidrug resistant bacteria.

Boyd, K.G., A. Mearns -Soragg, G. Briedley, K. Hatzidimitriou, A. Rennie, M. Bregu, M. 0. Hubble, and J. G. Burgess. 1998. Antifouling potential of epiphytic marine bacteria from the surface of marine algae. Plouzane, France: 128 -136.

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Icebreaker Pheromone Cologne



It is important to understand that the pheromones of one species consist of different chemicals than the pheromones of another species. Each species only wants to attract its own kind. Therefore, humans aren't secreting pheromones that attract cats, and so on. It would have been too confusing and way too funny had this been not the case.

ANTIBIOTIC ASSAYS Antibiotic activity was performed in duplicate using a standard paper disc diffusion method as well as well assay. In well assay 10mm in diameter wells were made in marine agar plates and the plates were swabbed with 16 hours old inducer strain. To these wells 200ul of cell free supernatant were added to each well. In paper disc assay the Watmann no.1 filter paper discs (6mm in diameter) were saturated with 200ul of cell free supernatant. The impregnant discs were Dlaced in the centre of the plates swabbed with test organisms. The plates were Incubated at 37??C overnight and observed for inhibition zone. The zone of inhibition was measured as the distance from the border of paper disc to the edge of the clear zone and expressed in mm.

EXPERIMENT NUMBER 2 In this experiment, culture supernatant was obtained as per the procedure given in the experiment 1. 50ml of supernatant was mixed with equal volume of 80% methanol and 1% acetic acid mixture and it was shaked thoroughly in a separating funnel. Finally the methanol and acetic acid fractions were collected and concentrated by evaporation using water bath at 55??C. The viscous colloidal residues were resuspended in 600 microlitre of 50% methanol and it was used for antibacterial assay against different test organism.

Does this make personalized perfume a bad gift? Actually it makes it a great gift. Anything that a person can give to another that makes them feel special and thought about is a wonderful gift. It's also a perfect gift for children to make them feel as though they stand out. The safety factor in purchasing a personalized perfume is that they match it to fragrances that are already preferred, so you are highly unlikely to present the recipient with a scent that they can not wear. It's really quite ingenious.

We suggest that the above said mechanisms in Pseudomonas with quorum sensing principle might have occurred in the present study also. This induces the bacteria Pseudomonas in epibiotic seaweeds to secrete certain active compound against to the competitor Vibrio species.

In the gram negative bacteria AHSL is an active principle of quorum sensing. Our producer strain is also been identified as Pseudomonas sps. So in these organisms also active principle must falls under the AHSL. The cell-cell signaling mechanism can either require import of the signal and subsequent interaction with intracellular effectors or a two-component signaling system that transducers the information across the membrane. In V. harveyi genetic analysis of the density sensing apparatus has two independent density-sensing systems, and each is composed of a sensor-auto inducer pair; system one is composed of sensor I and Al -1, and system two is composed of sensor 2 and AI-2. The two densities - sensing system are redundant, because a null mutation in either system alone results in expression of hidden genes (Bassler, et al.,1999.).

illaud, A. C, and B. Austin. 1990. Inhibition of the fish pathogen, Serratia liquefaciens by an antibiotic producing isolates of planococcus recovered from sea water. Journal of

CONCLUSION: The present investigation was aimed to study the quorum sensing principle among seaweed epibiotic bacterial organisms. In the past few decades there was no findings of new novel antibacterial class compounds were identified. But, the pathogenic microorganisms show much higher rate of resistant development even to the potential antibiotics. So, there is an urgent need to discover new novel antibiotic compounds. The marine inhabitants such as microorganisms, seaweeds, invertebrates, etc., act as an undepleted source of wide range of natural products among which the seaweeds act as a potential source of antibiotic compounds. Currently the cross species induction / quorum sensing attracts the total attention of researchers in finding new novel drugs against multidrug resistant pathogenic microorganisms. So, the present study aim to find out the capability of seaweed epibiotic bacterial organisms to produce novel drugs against the animal and plant pathogens

Vandevivere, P., and D. L. Kirchman.1993. Attachment stimulates exopolysaccharide synthesis by a bacterium. Appl. Environ. Microbiol. 59: 3280-3286.

Vijaya baskar .P 1* AND Veera ravi.A 2 1. Department of biotechnology Dr. G.R.D.C.S, Coimbatore. 2. Department of biotechnology, Alagappa University, karaikudi.

Korber, D. R., J. R.Lawrence, H. M. Lappin-scott, and J. W. Costerton. 1995. Growth of microorganisms on surfaces. In. Microbial. Biofilm, Lapp in - Scott. Cambridge, UK: Cambridge university press.

If you have ever wondered "what are pheromones" you are probably not alone. In fact, there have been many people who have wondered what pheromones are, and a lot of research has been done on the topic.

Armstrong, E., J. D. Mckenzie, and G.T. G. Worthy. 1999. Aquaculture of sponges on scallops for natural products research and antifouling. J. Biotechnol. 70: 163-174. 70. 21-

Bassler, B.L.1999. Curr.Opin.Microbiol.2: 582-587.* Bernan, V. S., M. Greenstein, and W. M. Maiese. 1997. Marine microorganisms as a source of new natural products. Adv. Appl. Microbiol. 43: 57 - 89.

Br B+ /Br B- Br C+/Br C- Br D+/Br D- Br E+/Br E- Br F+/Br F- BrA- Br B- BrC- BrD- BrE- BrF- NIL 39

Zhang, L., P. J. Murphy, and A. Kerr. 1993. Agrobacterium conjugation and gene regulation by /V-acyl-L-homoserine lactones. Nature 362: 446 - 448.

Evelyn, A., Y. Liming, K.G. Boyd, P. C. Wright, and J. G. Burgess. 2001. The symbiotic role of marine microbes on living surfaces. Hydrobiologia. 461: 37 - 40

*Corresponding author e-mail: vijay10bas@yahoo.co.in INTRODUCTION We are living in a microbial planet. About 71 % of the surface of this planet is covered by sea water. A typical milliliter of seawater contains 103 fungal cells, 106 bacteria, and 107 viruses, including pathogens that cause widespread mortalities and microbes that initiate fouling of host surfaces (Rheinheimer, 1992). Thus, marine plants and animals are continually exposed to high concentrations of potentially harmful microbes. These microorganisms in nature exists as free living planktonic mode of life in sea water or it may exist as epibiotic organisms in various living and nonliving surfaces. Among living organisms, seaweeds and invertebrates act as suitable substrate for the establishment of epibiotic organisms Seaweeds are known to release a large amount of organic carbon into the surrounding environment providing a nutrient rich habitat for microorganisms like bacteria. Bacteria are generally considered to be independent unicellular organisms. One cell accomplishes all of the tasks of feeding, locomotion, 'reproduction, respiration and all other processes necessary to keep an organism alive. There are several classes of bacteria such as primary film forming bacteria, sediment bacteria, symbiotic bacteria, and epibiotic bacteria in various aquatic organisms. The marine surface environment is a site of intense composition for living space by a wide variety of organisms. Bacteria are generally recognized as primary colonizers of this habitat and are able to form biofilm on marine surface such as invertebrates and algae (Bryers, et al., 1982). Bacteria may also be abundant on the surfaces of some algae as an important epibiotic organism. In many cases, the bacterial population found to be specific, with changes occurring throughout the year or life span of the algal surface. This algal-bacterial relationship is symbiotic in most cases; the epibiotic bacteria in seaweed play a protective role by releasing secondary metabolites into the surrounding seawater that help preventing extensive fouling of the surface. Epibiotic bacteria are therefore attracting attention as a source of new natural products. Bacteria from the larvae of some crustaceans protect them from fungal infection by the production of simple antimicrobial compounds. Bacteria isolated from the surface of a tunicate prevented the settlement of barnacle and tunicate larvae exposed to the bacteria as biofilm in petridishes (Evelyn et al., 2001).

Kell, D. B., A. S. Kaprelyants, and A. Grafen. 1995. Pheromones, Social behaviour and the functions of secondary metabolism in bacteria. Trends in Ecol. and Evol. 10: 126-129.

If you and your loved one are looking for new and exciting ways of expressing your love for one another, these fore mentioned oils and lubricants can add just that. Impress your lover by treating them to a sensual massage, indulge in mutual foreplay with your choice in flavored lubricant, get out the safe latex friendly personal lubricant and have fun. All of the oil and lubricants are aimed at foreplay which is a critical part of love making; it raises the romance and can increase the desire you have for that lucky person.



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