This document discusses how biotechnology can help solve slime problems in the paper industry. It describes how slime forms due to microorganisms like fungi and bacteria under optimal temperature, moisture and nutrient conditions in paper mills. This causes issues like production losses and reduced paper quality. The document then explains how biosurfactants, enzymes, and bio dispersants produced through biotechnology can help control slime. Enzymes like levanase have been shown to break down slime polymers and allow biocides to more effectively kill microbes at lower concentrations, improving paper quality while reducing biocide usage.
Microbial biotechnology is the use of microorganisms to obtain an economically valuable product or activity at a commercial or large scale.
Like any other man-made technology, microbial biotechnology has both positive and negative effects on the environment.
Biotechnology may carry more risk than other scientific fields: microbes are tiny and difficult to detect, but the dangers are potentially vast.
The use of biotechnical methods—including genetically-engineered microorganisms—is indispensable for the manufacture of many products essential to mankind.
For better or for worse, it is the mankind's task to tackle the problems that are associated with the use of this technology, and which to a high degree are located in the field of unwanted environmental impacts.
The use of biotechnology should be restricted to enhancing the quality of life for plants, animals and human beings only. Anything beyond that is unnatural and highly disastrous to us.
The material describes components of industrial fermentation media with their respective metabolic importance for the industrial microbes. it also addresses industrial scale sterilization methods.
Microbial biotechnology is the use of microorganisms to obtain an economically valuable product or activity at a commercial or large scale.
Like any other man-made technology, microbial biotechnology has both positive and negative effects on the environment.
Biotechnology may carry more risk than other scientific fields: microbes are tiny and difficult to detect, but the dangers are potentially vast.
The use of biotechnical methods—including genetically-engineered microorganisms—is indispensable for the manufacture of many products essential to mankind.
For better or for worse, it is the mankind's task to tackle the problems that are associated with the use of this technology, and which to a high degree are located in the field of unwanted environmental impacts.
The use of biotechnology should be restricted to enhancing the quality of life for plants, animals and human beings only. Anything beyond that is unnatural and highly disastrous to us.
The material describes components of industrial fermentation media with their respective metabolic importance for the industrial microbes. it also addresses industrial scale sterilization methods.
Introduction:
RNA interference (RNAi) or Post-Transcriptional Gene Silencing (PTGS) is an important biological process for modulating eukaryotic gene expression.
It is highly conserved process of posttranscriptional gene silencing by which double stranded RNA (dsRNA) causes sequence-specific degradation of mRNA sequences.
dsRNA-induced gene silencing (RNAi) is reported in a wide range of eukaryotes ranging from worms, insects, mammals and plants.
This process mediates resistance to both endogenous parasitic and exogenous pathogenic nucleic acids, and regulates the expression of protein-coding genes.
What are small ncRNAs?
micro RNA (miRNA)
short interfering RNA (siRNA)
Properties of small non-coding RNA:
Involved in silencing mRNA transcripts.
Called “small” because they are usually only about 21-24 nucleotides long.
Synthesized by first cutting up longer precursor sequences (like the 61nt one that Lee discovered).
Silence an mRNA by base pairing with some sequence on the mRNA.
Discovery of siRNA?
The first small RNA:
In 1993 Rosalind Lee (Victor Ambros lab) was studying a non- coding gene in C. elegans, lin-4, that was involved in silencing of another gene, lin-14, at the appropriate time in the
development of the worm C. elegans.
Two small transcripts of lin-4 (22nt and 61nt) were found to be complementary to a sequence in the 3' UTR of lin-14.
Because lin-4 encoded no protein, she deduced that it must be these transcripts that are causing the silencing by RNA-RNA interactions.
Types of RNAi ( non coding RNA)
MiRNA
Length (23-25 nt)
Trans acting
Binds with target MRNA in mismatch
Translation inhibition
Si RNA
Length 21 nt.
Cis acting
Bind with target Mrna in perfect complementary sequence
Piwi-RNA
Length ; 25 to 36 nt.
Expressed in Germ Cells
Regulates trnasposomes activity
MECHANISM OF RNAI:
First the double-stranded RNA teams up with a protein complex named Dicer, which cuts the long RNA into short pieces.
Then another protein complex called RISC (RNA-induced silencing complex) discards one of the two RNA strands.
The RISC-docked, single-stranded RNA then pairs with the homologous mRNA and destroys it.
THE RISC COMPLEX:
RISC is large(>500kD) RNA multi- protein Binding complex which triggers MRNA degradation in response to MRNA
Unwinding of double stranded Si RNA by ATP independent Helicase
Active component of RISC is Ago proteins( ENDONUCLEASE) which cleave target MRNA.
DICER: endonuclease (RNase Family III)
Argonaute: Central Component of the RNA-Induced Silencing Complex (RISC)
One strand of the dsRNA produced by Dicer is retained in the RISC complex in association with Argonaute
ARGONAUTE PROTEIN :
1.PAZ(PIWI/Argonaute/ Zwille)- Recognition of target MRNA
2.PIWI (p-element induced wimpy Testis)- breaks Phosphodiester bond of mRNA.)RNAse H activity.
MiRNA:
The Double-stranded RNAs are naturally produced in eukaryotic cells during development, and they have a key role in regulating gene expression .
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
Richard's aventures in two entangled wonderlandsRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic ...Sérgio Sacani
We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
imaging field observed with JWST. We make use of the ancillary Hubble optical images (5 filters
spanning 0.4−0.9µm) and novel JWST images with 14 filters spanning 0.8−5µm, including 7 mediumband filters, and reaching total exposure times of up to 46 hours per filter. We combine all our data
at > 2.3µm to construct an ultradeep image, reaching as deep as ≈ 31.4 AB mag in the stack and
30.3-31.0 AB mag (5σ, r = 0.1” circular aperture) in individual filters. We measure photometric
redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts
z = 11.5 − 15. These objects show compact half-light radii of R1/2 ∼ 50 − 200pc, stellar masses of
M⋆ ∼ 107−108M⊙, and star-formation rates of SFR ∼ 0.1−1 M⊙ yr−1
. Our search finds no candidates
at 15 < z < 20, placing upper limits at these redshifts. We develop a forward modeling approach to
infer the properties of the evolving luminosity function without binning in redshift or luminosity that
marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the
impact of non-detections. We find a z = 12 luminosity function in good agreement with prior results,
and that the luminosity function normalization and UV luminosity density decline by a factor of ∼ 2.5
from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical
models for evolution of the dark matter halo mass function.
Cancer cell metabolism: special Reference to Lactate PathwayAADYARAJPANDEY1
Normal Cell Metabolism:
Cellular respiration describes the series of steps that cells use to break down sugar and other chemicals to get the energy we need to function.
Energy is stored in the bonds of glucose and when glucose is broken down, much of that energy is released.
Cell utilize energy in the form of ATP.
The first step of respiration is called glycolysis. In a series of steps, glycolysis breaks glucose into two smaller molecules - a chemical called pyruvate. A small amount of ATP is formed during this process.
Most healthy cells continue the breakdown in a second process, called the Kreb's cycle. The Kreb's cycle allows cells to “burn” the pyruvates made in glycolysis to get more ATP.
The last step in the breakdown of glucose is called oxidative phosphorylation (Ox-Phos).
It takes place in specialized cell structures called mitochondria. This process produces a large amount of ATP. Importantly, cells need oxygen to complete oxidative phosphorylation.
If a cell completes only glycolysis, only 2 molecules of ATP are made per glucose. However, if the cell completes the entire respiration process (glycolysis - Kreb's - oxidative phosphorylation), about 36 molecules of ATP are created, giving it much more energy to use.
IN CANCER CELL:
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
introduction to WARBERG PHENOMENA:
WARBURG EFFECT Usually, cancer cells are highly glycolytic (glucose addiction) and take up more glucose than do normal cells from outside.
Otto Heinrich Warburg (; 8 October 1883 – 1 August 1970) In 1931 was awarded the Nobel Prize in Physiology for his "discovery of the nature and mode of action of the respiratory enzyme.
WARNBURG EFFECT : cancer cells under aerobic (well-oxygenated) conditions to metabolize glucose to lactate (aerobic glycolysis) is known as the Warburg effect. Warburg made the observation that tumor slices consume glucose and secrete lactate at a higher rate than normal tissues.
Seminar of U.V. Spectroscopy by SAMIR PANDASAMIR PANDA
Spectroscopy is a branch of science dealing the study of interaction of electromagnetic radiation with matter.
Ultraviolet-visible spectroscopy refers to absorption spectroscopy or reflect spectroscopy in the UV-VIS spectral region.
Ultraviolet-visible spectroscopy is an analytical method that can measure the amount of light received by the analyte.
Richard's entangled aventures in wonderlandRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Slide 1: Title Slide
Extrachromosomal Inheritance
Slide 2: Introduction to Extrachromosomal Inheritance
Definition: Extrachromosomal inheritance refers to the transmission of genetic material that is not found within the nucleus.
Key Components: Involves genes located in mitochondria, chloroplasts, and plasmids.
Slide 3: Mitochondrial Inheritance
Mitochondria: Organelles responsible for energy production.
Mitochondrial DNA (mtDNA): Circular DNA molecule found in mitochondria.
Inheritance Pattern: Maternally inherited, meaning it is passed from mothers to all their offspring.
Diseases: Examples include Leber’s hereditary optic neuropathy (LHON) and mitochondrial myopathy.
Slide 4: Chloroplast Inheritance
Chloroplasts: Organelles responsible for photosynthesis in plants.
Chloroplast DNA (cpDNA): Circular DNA molecule found in chloroplasts.
Inheritance Pattern: Often maternally inherited in most plants, but can vary in some species.
Examples: Variegation in plants, where leaf color patterns are determined by chloroplast DNA.
Slide 5: Plasmid Inheritance
Plasmids: Small, circular DNA molecules found in bacteria and some eukaryotes.
Features: Can carry antibiotic resistance genes and can be transferred between cells through processes like conjugation.
Significance: Important in biotechnology for gene cloning and genetic engineering.
Slide 6: Mechanisms of Extrachromosomal Inheritance
Non-Mendelian Patterns: Do not follow Mendel’s laws of inheritance.
Cytoplasmic Segregation: During cell division, organelles like mitochondria and chloroplasts are randomly distributed to daughter cells.
Heteroplasmy: Presence of more than one type of organellar genome within a cell, leading to variation in expression.
Slide 7: Examples of Extrachromosomal Inheritance
Four O’clock Plant (Mirabilis jalapa): Shows variegated leaves due to different cpDNA in leaf cells.
Petite Mutants in Yeast: Result from mutations in mitochondrial DNA affecting respiration.
Slide 8: Importance of Extrachromosomal Inheritance
Evolution: Provides insight into the evolution of eukaryotic cells.
Medicine: Understanding mitochondrial inheritance helps in diagnosing and treating mitochondrial diseases.
Agriculture: Chloroplast inheritance can be used in plant breeding and genetic modification.
Slide 9: Recent Research and Advances
Gene Editing: Techniques like CRISPR-Cas9 are being used to edit mitochondrial and chloroplast DNA.
Therapies: Development of mitochondrial replacement therapy (MRT) for preventing mitochondrial diseases.
Slide 10: Conclusion
Summary: Extrachromosomal inheritance involves the transmission of genetic material outside the nucleus and plays a crucial role in genetics, medicine, and biotechnology.
Future Directions: Continued research and technological advancements hold promise for new treatments and applications.
Slide 11: Questions and Discussion
Invite Audience: Open the floor for any questions or further discussion on the topic.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
2. INTRODUCTION
• A well known and longstanding problem in paper manufacture is the proliferation
of biological slimes on machinery.
• The process conditions of paper mills are favorable for the reproduction of slime
forming microorganisms because of the nutrients ,temperature, and moisture.
• The slime formation occurs due to growth of microorganism like fungi ,bacteria
etc.
• Fiber based paper mills using closed processes have optimal conditions for
growth of the organism due to high nutrient level ,optimum temperature and pH.
4. THE PROBLEMS IN PAPER MILL
Different types of losses happens in paper industries due to the formation of slime,
such as:
• Production of dangerous gases(hydrogen, methane etc)
• The microbial growth causes spoilage of raw materials and additives used during
paper making.
• Reduction in quality( slime spots, holes, odors in paper products)
• Loss of production.
5. SLIME CONTROL
Biocides :Using of these biocides became a part of the paper and pulp
industry.
• Properties : Cheap , efficient, and should not disturb the paper making process.
• Biocides are divided in 2 types :-
Oxidizing biocides : Sodium bromide , ammonium sulfate.
Nonoxidizing biocides : 2-Bromo-2-nitropropane-1,3-diol, Diethyldithicarbamate.
6. Cleaning :-
• To control the slime, mechanical cleaning and boil out at extreme pH levels and
high temperature.
• Cleaning is often done with high pressure water flushing.
• Mechanical cleaning and boil out are often impracticable, and can be costly they
usually involve equipment down time.
7. HOW BIOTECHNOLOGY IS SOLVE THIS
PROBLEM
Biosurfactants :-
• The term biosurfactant has generally been used to refer to any compound which
has some influence on interfaces.
• The best characterized lipopeptide surfactants are SURFACTIN, which has been
isolated from several strains of Bacillus subtilis and Bacillus pumilis, VISCOSIN
which is produced by Pseudomonas fluorescens, and ARTHROFACTIN produced
by Arthrobacter sp. Strain MIS38.
8. • Surfactin produced by Bacillus subtilis ATTC 21332 is one of the most effective
biosurfactants known.
• Biosurfactants are involved in cell adhesion, emulsification, dispersion,
flocculation, cell aggregation etc.
• Biosurfactants are biodegradable, potentially less toxic tan the synthetic
compounds currently used and can be produced from a variety of substrates.
9. ENZYMATIC SLIME DEPOSIT CONTROL
• Nowadays research is focused on both the prevention and disruption of biofilm
build-up caused by slime-forming species of bacteria, yeasts and fungi.
• The use of enzyme in the control of microbiological slime deposits, particular
EDC-1(enzymatic deposit control) developed by Hatcher has proved useful under
modern mill conditions.
• EDC-1 is an enzyme that hydrolyses and depolymerizes the fructose
polysaccharide Levan, which has been identified in paper mil slime.
10. • It is non-toxic does not promote resistance, does not accumulate in the system as
it is in activated at 80-100°C and is safe to handle.
• The reason is that EDC-1 is a specific Levan- hydrolyzing enzyme ,i.e., it is
restricted to Levan-producing bacteria which have been shown to be secondary
factor in many process waters.
11. BIO DISPERSANTS
• Bio dispersants play an essential role in modern programs to control biofilms
caused by excessive growth of micro-organisms such as bacteria, yeast and
moulds.
• It is based on the non-ionic polymers, which are non-toxic, non foaming, colorless
and free of organic solvents.
• Because of their non-ionic character they will neither increase the system
anioncity nor interfere with other papermaking chemicals.
• It has no pH limitations.
12. • Slime not only deteriorates paper but it protects bacteria from biocidal conditions and
biocides by making penetration of biocides to cell mass difficult,
• Therefore, an alternative has been developed that employs slime dissolving enzymes.
• Once the slime has been digested away the cells are then directly exposed to the
biocide which is now effective at lower concentration.
• The slime, which is a fructan polymer, is broken down to monomers by carbohydrase
type of enzymes
• There are two types of enzymes involved in fructan degradation-hydrolases and
transferases. The hydrolytic enzymes, according to their mode of action, are either
endo- or exo-enzymes, producing a homologous series of oligofructans or only fructose,
respectively.
• The transferases, on the other hand, split off fructose dimers and by simultaneous
transfructosylation give rise to difructose anhydride.
13. • Several microorganisms producing levan degrading enzymes have been isolated from
various sources.
• The organisms include: Bacillus stearothermophilus, B. cereus, B. cereus var.
mucordes, B. megaterium, Aerobacter aerogeries, lkwinia herbicola, Serratia
marcescerls ; Micrococcus spp., Pseudomonas spp., Streptococcus spp. (hemolytic);
• Lactobacillus plantarium, Streptomyces cyanoalbus. Streptomyces voleus [%I],
Arthrobacter ureafaciens; and Rhodotorula sp
• Levanases from Streptomyces sp. no. 7-3, BaciNus sp. no 71 and Rhodotorula sp.
have been purified and their molecular weights are found be 54, 135 and 39 kDa,
respectively. The enzyme of Streptomyces sp. no. 7-3 and Streptomyces exfoliates F3-
2 [61] have been found to hydrolyze levan to produce levanbiose.
• Levanase from Bacillus sp. produces levanheptose as the predominant product.
14. • Cloning of this enzyme has been attempted in various organisms. The Bacillus subtilis
levanase has been cloned in Escherichia coli and Saccharomyces cerevisiae
• Combined treatment with 20 ppm methelyne-bisthiocyanate (MBT) and 40 ppm levan
hydrolase has been shown to lower the colony count of Aerobacter Ievanicum and
Bacillus subtilis from 109 and 104 CFU/mL to 106 and 103 CFU/mL, respectively.
Whereas against Rhodotorula glutinis the use of 10 ppm MBT and 40 ppm enzyme
decreased the colony count from 104 to 10 CFU/mL.
• Further it was shown that on application of enzyme (0.10 kg/metric ton) on machines
producing printing grade paper, the biocide concentration could be reduced from 0.13 to
0.02 kg/metric ton.
• The amount of biocide was reduced to -15% of what had been employed prior to using
the enzyme.
• A similar level of reduction in biocide concentration was achieved in the whitewater
system of a paper mill when an enzyme preparation was deployed
15. • Patterson reported that with the use of enzyme, the concentration of biocide may be
reduced only by 50% and slime breaks are reduced from three per day to three per
month.
• Similarly, Colasurdo and Wilton [13] noted that with the use of an enzyme preparation
at SONOCO Products Co., Hartsville, U.S.A., the slime breaks were virtually eliminated,
leading to increased productivity.
• Another enzyme product NOPCO EDC-1 is in common use in the United States, Japan,
Britain, and Scandinavia for improved control of slime with reduced biocide levels.
• This strategy has improved paper quality by reducing the number of holes and splits
during manufacture.
• The levanase enzyme produced by Rhodotorula sp. has also been found to reduce the
needed biocide concentration by 25% without adversely affecting the paper properties