12/15/2019

Women Men Love 

If you've been in the dating game for a bit too long, you know how hard it is to find a good match. If you are a woman, you might have even tried to wear more revealing outfits to compete with the younger girls, only to find yourself still single. And if you are a man, you might be feeling the pressure and tend to come on like gang busters to any woman walking. Well don't feel too bad because obviously there are a lot of people still single and will continue to act like this. The good thing for you is that you no longer will!
 




We have avoided adding flimsy points on pheromones in spiders, as we find that the addition of such points have no effect on pheromones in spiders.


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.

Being one of those women men love also requires a certain level of self-awareness. It may be that you are, in fact one of the women men love, but perhaps you aren't looking for the right kind of man. If you don't know yourself well enough to recognize a bad match, you probably aren't ready for a relationship anyway. Next time you find yourself observing the women men love, notice how the partnerships are equal. Looking to your partner for your own happiness only leads to unmet expectations and disappointment.

U2- U3- U4- U1+/U1- U2+/U2- U3+/U3- U4+/U4- U1- U2- U3- U4- NIL NIL NIL NIL Sediment 17. SA+ SA- SA+/SA- SA- 28

The truth... pheromone oils probably instill an air of confidence in the "wearer." While you may get noticed, the hard work is still up to you. Alone, pheromone oils won't get you mobbed; you'll still need to use some form of persuasive conversation.

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.

Table 2: The results of Quorum Sensing analysis of epibiotic bacterial isolates from seaweeds. Seaweed sample Producer organism Inducer organism Cross-species producer with inducer Cross-species supernatant test with inducer Zone of clearance (mm)

Choosing A Product Okay, let's purchase a pheromone oil product. Searching online we come across some likely candidates. Some are cheaper than others while some are offering some pretty sweet deals such as a two-for-one offer. Let's narrow it down:

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

Do pheromone oils do what they claim to do? This is now a well worn question and one which is difficult to answer. If you are considering playing the synthesized pheromone game then you need to consider a few things before diving into your purse or wallet and purchasing the first product you come across.

Dekievit, T. R., and B. H. Iglewski. 2000. Bacterial quorum sensing in pathogenic relationships. Infect. Immun. 66: 4839-4849. Dimango, E., H. J. Zar, R. Bryan, and A. Prince. 1995. Diverse Pseudomonas aerugniosa gene products stimulate respiratory epithelial cells to produce interleukin-8. J. Clin-lnvestig. 96: 2204-2210.

Table 1. List of Seaweeds species collected for the present study SPECIES NAME FAMILY Halimeda gracilis Chlorophyceae Ulva lactuca Chlorophyceae

RESULTS AND DISCUSSION: QUORUM SENSING/CROSS SPECIES INDUCTION ANALYSIS In the present investigation totally 54 isolates were collected out of seaweed species. Among 54 isolates, 17 of them are producer strain, another 17 are the inducer strain rest of 20 isolates is normal and not showing any signs of activity (Table.2).

Human pheromone oils are fast becoming the "secret weapon" of singles looking for an edge in the game of sex. Let's face it, for most of us, any kind of advantage is welcome!

Hiroaki, S., and K. M. Smith. 2003. Molecular mechanisms of bacterial quorum sensing as a new drug target. Curr. Opin. Chem. Biol. 7: 586-591. Hoang, T., Y. Ma, R. J. Stern, M. R. Meneil, and H. P. Schwezer. 1999. Construction and use of low-copy number T7 expression vectors for purification of problem proteins: purification of Mycobacterium tuberculosis RmID and Pseudomonas aeruginosa Lasl and Rhll proteins, and functional analysis of purified Rhll. Gene. 237: 361 - 371.

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.

In gram positive bacteria peptide and derivative peptide based signaling molecules seem to be the predominant mode of communication. During high cell density the marine bacteria can produce enzymes, surfactants, toxins, and antibiotics by the chemical signal communication. Marine epibiotic bacteria are also known to produce compounds active against drug resistant hospital pathogen by the cross species induction method. Building on assays described by Austin (Billaud and Austin 1990) a screening procedure has been developed in which marine bacteria are challenged by exposing them to terrestrial bacteria prior to assay of antimicrobial compounds. Hence in this present investigation it is proposed to find out the ability of sea weed epibiotic bacterial organism to produce antibacterial compounds through quorum sensing.

Burgess, J. G., M. Elizabeth, M. Bregu, A. Meams-Sprugg, and K. G. Boyd. 1999 Microbial antagonism: a neglected avenue of natural products research. J. Biotechnology. 70. 27-32.

This experiment does not showed any inhibition zones Bacterial identification The 3 producer and 3 inducer strains which were responded the quorum sensing principles alone were subjected to biochemical analysis for identification. The obtained results revealed that all the producer strains showed sings of Pseudomonas sps and the inducer strains showed signs of Vibrio sps. So, based on the obtained result all the producer strains seems to be a Pseudomonas sps where as all the Inducer strain belongs to the genus vibrio.

*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).

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.

We have avoided adding flimsy points on pheromones in spiders, as we find that the addition of such points have no effect on pheromones in spiders.



Icebreaker Pheromone Cologne



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

Burgess, J. G., E. M. Jordan, M. Bregu, and A. Mearns-spragg. 1999. Microbial antagonism: a neglected avenue of natural products research. J. Biotechnology. 70: 27-32.

1. Do a check on the company and see how long they have been in business. 2. This is the most important aspect. Check to see if the company produces it's own product in-house. If it does, this is a big plus!

Lemos, M. L, A. E. Toranzod, and L. J. Barja. 1986. Antibiotic activity of epiphytic bacteria isolated from intertidal seaweeds. Microbial Ecology. 11: 149-163.

Bryers, J. D., and W. G. Characklis. 1982. Processes governing primary biofilm formation. Bioeng. 24: 2451-2476 Burgess, J. G., K. Boyd, E. Armstrong, T. Pisacane, and D. R. Adams. 2003. The development of a marine natural product-based antifouling paint. Biofouling. 19: 197 -205.

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.

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.

Caulerpa racemosa Chlorophyceae Dictyota dichotoma Phaeophyceae Turbinaria ornata Phaeophyceae Padina gymnospora Phaeophyceae Sargassum cinearifolium Phaeophyceae

Where To Look? Do a search online and you will be confronted with a multitude of pheromone oil choices. Which one do you choose? How can you trust the source selling the product? Does this stuff really work?

Liming, Y., K. G. Boyd, and D. R. Adams. 2003. Biofilm specific cross species induction of antimicrobial compounds in Bacilli. AppI.Envi.Microbiol, 69:3719-3727.

Trischman, J.A., D.M.Tapiolas, P.R.Jensen, R.Dwight, W.Fenical, T.C.Mckee, C.M.Ireland, T.J.Stout, J.CIarely. 1994. Salinamide - A and salinamide - B - anti -inflammatory depsipeptides from a marine streptomycete. J.Am.Chem.Soc. 116: 757 -758.

Holmstrom, C, and S. Kjelleberg. 1994. The effect of external biological factors on, settlement of marine invertebrates and new antifouling technologies. Biofouling. 8: 147-160.

In this experiment among 17 Producer and Inducer strains only 3 of them have responded to the quorum sensing principle. (BrB+/BrB-), (GcC+/GcC) and (SA+/SA-)

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.

Being one of those women men love also requires a certain level of self-awareness. It may be that you are, in fact one of the women men love, but perhaps you aren't looking for the right kind of man. If you don't know yourself well enough to recognize a bad match, you probably aren't ready for a relationship anyway. Next time you find yourself observing the women men love, notice how the partnerships are equal. Looking to your partner for your own happiness only leads to unmet expectations and disappointment.

Rheinheimer, G.1992.Aquatic microbiology (Wiley, New York), 3rd Ed. Stead, P., B. A. M. Rudd, H. Bradshaw, D. Nobel, and M. J. Dawson. 1996. Induction of phenazine biosynthesis in cultures Pseudomonas aeruginosa by L-N-(3-oxohexanoyl) homoserine lactone. FEMS Microbiology Letters 140: 15-22.

Wagner, V. E., D. Bushneil, and L. Passador. 2003. Micro array analysis of Pseudomonas aeruginosa quorum sensing regulons. J. Bacteriol, 185: 2080 - 2095.

When you look at the type of women men love you probably consider looks first, but the one characteristic all these women possess is intelligence. Whether you want to believe it or not, men love intelligent women and showing a man how smart you are will pique his interest. If you want to be one of the women men love, stop focusing so much on why you don't have a boyfriend and own your independence. Smart women strive to achieve their goals, which gives them less time to tend to their man's every want and need.

Quorum sensing usually focused on the bacteria growing in homogeneous environment. However few studies have attempted to a study this principle in heterogeneous environment also. In this present investigation we have attempted to study both homogeneous as well as heterogeneous environment. In former one we have isolated producer strain in seaweed eipbionts and it shows inhibitory activity against the inducer organism at the same seaweed epibionts. Later producer strains from seaweed epibionts, were treated with various Vibrio organisms from different environment. The obtain result of this study shows that the producer strain are capable of secreting antibiotic compounds not only to their natural competitors in its own habitate but also to the pathogen inhabiting in a distant related environment.

The results of Vanderivere and Kirchman 1993 suggest that the addition of increased surface by adding sand will induce the exopolymer synthesis through the high cell density dependent system. In the same way the bacterial organisms attached to the surface of seaweed shows alteration of genes expression may be due to the response to the high competitive environment. When cell density increases the competition for space and nutrients are also increased. So the existing bacteria were forced to protect themselves in this competitive environment. Normally in this condition the bacteria will be activated to induce the expression of certain hidden genes in genetic material through quorum sensing. The quorum sensing is principles were active compounds (autoinducer) from bacterial cell will promote the expression of a particular hidden gene of other bacterial organism in a stressed condition.

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.

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

That's a simple shortlist of checkpoints you can perform before considering a pheromone oil product. The second point is extremely important. A company which produces it's own product in-house is usually a good sign that they aim to be in business a long time. Even more importantly, you can bet they have conducted plenty of research on the product and will continue to do so in future.

a) Among these 17 producers strain 6 strains were isolated from Hypnea musiformis. 6 from Gracillaria edulis, 4 from Ulva lactuca & 1 from Sediment.

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-

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.

Dictyota batryensis Phaeophyceae Sargassum sps Phaeophyceae Hypnea musciformis Rhodophyceae Acanthophora dendroides Rhodophyceae Jania rubens Rhodophyceae

In this present work the totally 54 isolates were screened from 20 different seaweed species out of which 34 species were showed the signs of quorum sensing i.e. 17 producer and 17 inducer strains, but when these organisms where subjected to quorum sensing principle in mixed culture only 3 them have responded. So the present study reveals around 17% of bacterial species isolated from seaweeds and sediment were responded to quorum sensing. According to the results of bacteria isolated from marine algae surfaces indicated that the incidence of antibiotic producing strains from this habitat was 20% where as that from sea water was only a few percent. In the present study also reveals more or less the same ratio in Pseudomonas spp. was observed. Our results also reveals a results of Kell et al., 1995; Stead et al., 1996; they have said the culture supernatant of Pseudomonas sps known to contain AHLS which induces the production of phenazine antibiotics. In this investigation due to time constraint, It was not attempted to identify the active compound secreted by Pseudomonas through quorum sensing, which may leave the space for the further intensive research in future.


Focus on yourself and your own happiness first and you will be sure to become one of the women men love no matter what. Look for a new job or start that catering business you've always wanted. Not only will your confidence soar, but you'll have to fight the fellas off with a stick!



It is very much feasible that you may think differently about pheromones in spiders once you complete reading this abstract on pheromones in spiders. Keep speculating!
Author Dave Thomson
 
 
 


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