The board of studies in botany of mumbai university has removed preparation of herbarium sheets for the syllabus as students randomly collect plants and most of them is thrown away . i feel it is an right move becasue sometimes the students collect plants in bulk without any use.
On Wed, Mar 7, 2012 at 6:41 AM, <indiantreepix@googlegroups.com> wrote: > Today's Topic Summary > > Group: http://groups.google.com/group/indiantreepix/topics > > Ipomoea batatas :: 06-March-2012 :: Hooghly (WB) [1 Update] > [efloraofindia:109969] Re: Herbarium Sheets [5 Updates] > [efloraofindia:109945] Lodha tribe customs: The bride will be married to the > mahua tree [1 Update] > > Ipomoea batatas :: 06-March-2012 :: Hooghly (WB) > > "Surajit Koley" <surajitnotavaila...@gmail.com> Mar 06 11:27PM +0530 > > Sir, > > I admit that i collected this tuber of Ipomoea batatas from a local bazaar. > Is it eligible to post in the upcoming 'Convolvulaceae week'? > > Thank you and Regards, > > Surajit Koley > > > > [efloraofindia:109969] Re: Herbarium Sheets > > Balkar Singh <balkara...@gmail.com> Mar 06 09:03PM +0530 > > Interesting Story Pankaj ji. situation here is not good. exposure to field > work is very less particularly in Punjab and Haryana Colleges and even in > universities. As per syllabi i asked every student to submit only 15-20 > sheets of common wild plants only just to teach them how to press, label > and preserve the plant specimens. earlier it was a practice to submit 60-70 > sheets whether properly done or not and many unidified. I usually take the > student to field tour twice a year atleast one long tour 4-5 days and one > short trip for one day. they make their herbarium out of the collection > done during these tours generally + some local common plants. I select only > good specimen for pasting from the collection of students. As submission of > herbarium have a weightage of 5%-10% marks in Practical exam, students have > to do it. > Above all the good thing is that students are taking interest in Botany > now. Going for M.Sc and Ph.D in Botany. This is a good sign for us. > > > -- > Regards > > Dr Balkar Singh > Head, Deptt. of Botany and Biotechnology > Arya P G College, Panipat > Haryana-132103 > 09416262964 > > > > Vijayasankar <vijay.botan...@gmail.com> Mar 06 09:35AM -0600 > > Very good observation indeed, Pankaj. > Coming back to the color & other specifications of herbarium sheet. > While at FRLHT, I had chance to digitize few thousand herbarium specimens > from various sources. The ivory or white sheets gave better results with > even and clear background (this is important to have undisturbed viewing of > specimen details, even when zoomed in), whereas, the even slightly dull or > greyish sheets produced bad images. editing was cumbersome and when tried > to brighten, the specimen image used to get bleached thus loosing its > details. > > When buying handmade paper, we should also avoid the ones with too many > visible fibers on the surface, they may be in different colors. > So, it is preferred that at least one side of the sheet should be clean > white with smooth finish. The size may be between 300 to 500 GSM (needs > verification) so that it doesn't bend when woody specimens mounted on them. > > Regards > > Vijayasankar Raman > National Center for Natural Products Research > University of Mississippi > > > > > > Balkar Singh <balkara...@gmail.com> Mar 06 09:32PM +0530 > > Thanks Vijayasankar Ji. Good information, I tried with two types of > Handmade Papers, both were rough and dull white to little grey. so rejected > them. After this good discussion, My search tomorrow will be only for good > white Ivory sheets rather than handmade paper. > thanks > > > -- > Regards > > Dr Balkar Singh > Head, Deptt. of Botany and Biotechnology > Arya P G College, Panipat > Haryana-132103 > 09416262964 > > > > Vijayasankar <vijay.botan...@gmail.com> Mar 06 10:49AM -0600 > > Balkar ji, > > From your response "...rather than handmade paper" I think I have somewhere > conveyed a wrong impression. I didn't mean to avoid handmade sheets, in > fact I prefer and suggest handmade sheets, only thing is that we need to > select the suitable quality for this purpose. It may be costlier but, after > all, herbarium specimens have to 'live' for few hundred years. > > Regards > > Vijayasankar Raman > National Center for Natural Products Research > University of Mississippi > > > > > > Balkar Singh <balkara...@gmail.com> Mar 06 10:27PM +0530 > > Yes Vijayasankar ji > Hand made paper sheets may be of good quality but in our area good quality > sheets were not there, so i thought for ivory sheets. Puna hand made paper > Institute supply only bulk orders as per their quotations. I think their > quality is good. > > > -- > Regards > > Dr Balkar Singh > Head, Deptt. of Botany and Biotechnology > Arya P G College, Panipat > Haryana-132103 > 09416262964 > > > > [efloraofindia:109945] Lodha tribe customs: The bride will be married to > the mahua tree > > JANAKI TURAGA <janakitur...@gmail.com> Mar 06 12:39PM +0530 > > Thanks for sharing this lovely ritual! > > > > > You received this message because you are subscribed to the Google Group > indiantreepix. > You can post via email. > To unsubscribe from this group, send an empty message. > For more options, visit this group. -- RESIDENTIAL ADRESS Dr.Nitesh Joshi Associate professor in botany C-601,haripreet ,tagore road,near poddarschool Santacruz ,west, Maharashtra India Mumbai -54 Official address Dr.Nitesh Joshi Associate professor in botany dept of botany Rizvi college of Arts ,Science and Commerce bandra west mumbai 400050
