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We've been expecting you. Looking for the originals rather than then down-rez stuff if possible. Looking at getting back in. Spent the last 4 hours going through da archive and da curated archive. Does anyone have this?

I've been wondering if the FAQ from three doors down should be posted here. At any rate, essentially the same request was posted there as well. I just wanted to let the requester know they'd been answered if they hadn't checked back yet. Also, I agree that many posters here may not be vola-savvy, but this one referred to both Da Archive and Da Curated Archive. Maybe instead of posting the link we can say Anyone know a trove with german WH40k rules and codices?

Suche deutsche Regeln! Hi there! I humbly request any and all paid stl files that people have for free. I can provide a good bit of FDG's catalogue to this site as well if people would like. I have only seen the Scanned versions. Did MG change it? Still all lower-case, no space.

Maybe I'm stupid for not checking three chans down, but is the new Eberron book up? Apparently the amount of traffic even brought down the redirect links, no idea why, but it happens every time a new 5e book comes out. Anyone have Best Left Buried or can point me to where it lives in a trove? Looking for a trove or collection of everything relating to the Infinity RPG system.

Thank You. Are there still any of that English version of UED game left? It seems to be all gone from the web. Hi looking for the 8th big black book from forgeworld tried googling but all links seem down.

Does anyone have copies of the japanese editions of WoD stuff? Trying to get some japanese nerds into rpgs. Looking for Woodfall if anybody has the pdf. Anyone have the second or third edition of Teenagers From Outer Space? The trove copies are corrupted unfortunately. Also interested in any source books as well. Kindly requesting any available Spike! Thanks in advance! I do apologize if this is a violation of the rules here but could anyone please tell me where to download prima's witcher 2 guide for the SECOND witcher btw not the 3.

Thank you in advance. Would anyone have a copy? Any one have PDFs for Spire, Strata and other works and material relating to the title and its setting? Anyone can tell me if the "Pathfinder Adventure Path Hellknight Hill" for pathfinder 2nd - it's the first adventure path for the 2nd edition is scanned yet please? Want to do a review of Chris A. Field's work, but I don't want to give money to a possible creep. Anyone got valid links for his work?

Didn't see them on the Trove. Thanks in advance A little out of left field, but; does anyone have the Watch the Skies gamepack? Requesting the Call of Cthulhu Miskatonic University guide - the newer one.

The Trove only has the much smaller older one. Cookies enable you to enjoy certain features, social sharing functionality, and tailor message and display ads to your interests on our site and others. They also help us understand how our site is being used. By continuing to use our site, you consent to our use of cookies.

Update your cookie preferences here. For more information on our use of non-essential Cookies, visit our Privacy Policy here. Advertisement Create a free account. Sign In. Claim a free adventure now to get started. Visit our blog for a full explanation. Our way of saying thanks! Hooke published his findings in his famous work, Micrographia. Actually, Hooke only observed cell walls because cork cells are dead and without cytoplasmic contents. Anton van Leeuwenhoek was the first person who observed living cells under a microscope and named them animalcules, meaning little animals.

On the basis of the internal architecture, all cells can be subdivided into two major classes, prokaryotic cells and eukaryotic cells. Cells that have unit membrane bound nuclei are called eukaryotic, whereas cells that lack a membrane bound nucleus are prokaryotic. Eukaryotic cells have a much more complex intracellular organization with internal membranes as compared to prokaryotic cells. Besides the nucleus, the eukaryotic cells have other membrane bound organelles little organs like the endoplasmic reticulum, Golgi complex, lysosomes, mitochondria, microbodies and vacuoles.

The region of the cell lying between the plasma membrane and the nucleus is the cytoplasm, comprising the cytosol or cytoplasmic matrix and the organelles. The prokaryotic cells lack such unit membrane bound organelles. Cell theory In , Schleiden, a German botanist, and Schwann, a British zoologist, led to the development of the cell theory or cell doctrine.

According to this theory all living things are made up of cells and cell is the basic structural and functional unit of life. In , Rudolf Virchow proposed an important extension of cell theory that all living cells arise from pre-existing cells omnis cellula e cellula.

The cell theory holds true for all cellular organisms. Non- cellular organisms such as virus do not obey cell theory. Over the time, the theory has continued to evolve. Evolution of the cell The earliest cells probably arose about 3. A very significant evolutionary event was the development of photosynthetic ability to fix CO2 into more complex organic compounds.

The original electron hydrogen donor for these photosynthetic organisms was probably H2S, yielding elemental sulfur as the byproduct, but at some point, cells developed the enzymatic capacity to use H2O as the electron donor in photosynthetic reactions, producing O2. The cyanobacteria are the modern descendants of these early photosynthetic O2 producers. One important landmark along this evolutionary road occurred when there was a transition from small cells with relatively simple internal structures - the so-called prokaryotic cells, which include various types of bacteria - to a flourishing of larger and radically more complex eukaryotic cells such as are found in higher animals and plants.

The fossil record shows that earliest eukaryotic cells evolved about 1. Details of the evolutionary path from prokaryotes to eukaryotes cannot be deduced from the fossil record alone, but morphological and biochemical comparison of modern organisms has suggested a reasonable sequence of events consistent with the fossil evidence. Three major changes must have occurred as prokaryotes gave rise to eukaryotes.

First, as cells acquired more DNA, mechanisms evolved to fold it compactly into discrete complexes with specific proteins and to divide it equally between daughter cells at cell division. These DNA-protein complexes called chromosomes become especially compact at the time of cell division. Second, as cells became larger and intracellular membrane organelles developed. Finally, primitive eukaryotic cells, which were incapable of photosynthesis or of aerobic metabolism, pooled their assets with those of aerobic bacteria or photosynthetic bacteria to form symbiotic associations that became permanent.

Some aerobic bacteria evolved into the mitochondria of modern eukaryotes, and some photosynthetic cyanobacteria became the chloroplasts of modern plant cells.

It acts as a selectively permeable membrane and regulates the molecular traffic across the boundary. The plasma membrane exhibits selective permeability; that is, it allows some solutes to cross it more easily than others. Different models were proposed to explain the structure and composition of plasma membranes. In , Jonathan Singer and Garth Nicolson proposed fluid-mosaic model, which is now the most accepted model.

In this model, membranes are viewed as quasi-fluid structures in which proteins are inserted into lipid bilayers. It describes both the mosaic arrangement of proteins embedded throughout the lipid bilayer as well as the fluid movement of lipids and proteins alike.

Peripheral protein Phospholipid bilayer Integral protein Peripheral protein Figure 3. The fatty acyl chains in the lipid bilayer form a fluid, hydrophobic region. Integral proteins float in this lipid bilayer.

Both proteins and lipids are free to move laterally in the plane of the bilayer, but movement of either from one face of the bilayer to the other is restricted. The ratio of protein to lipid varies enormously depends on cell types. Carbohydrates bound either to proteins as constituents of glycoproteins or to lipids as constituents of glycolipids. Carbohydrates are especially abundant in the plasma membranes of eukaryotic cells. Lipid bilayer The basic structure of the plasma membrane is the lipid bilayer.

This bilayer is composed of two leaflets of amphipathic lipid molecules, whose polar head groups are in contact with the intra- or extracellular aqueous phase, whereas their non-polar tails face each other, constituting the hydrophobic interior of the membrane. The primary physical forces for organizing lipid bilayer are hydrophobic interactions.

Three classes of lipid molecules present in lipid bilayer - phospholipids, glycolipids and sterol. The hydrophilic unit, also called the polar head group, is represented by a circle, whereas the hydrocarbon tails are depicted by straight lines. Phospholipids Phospholipids are made up of four components: an alcohol glycerol or sphingosine , fatty acids, phosphate, and an alcohol attached to the phosphate. The fatty acid components are hydrophobic, whereas the remainder of the molecule has hydrophilic.

There are two types of phospholipids: glycerophospholipids and sphingophospholipids. Phospholipids derived from glycerol are called glycerophospholipids. Glycerophospholipids or phosphoglycerides contain glycerol, fatty acids, phosphate and an alcohol e.

Phosphoglyceride molecules are classified according to the types of alcohol linked to the phosphate group. For example, if the alcohol is choline, the molecule is called phosphatidylcholine also referred to as lecithin and if serine, then it is called phosphotidylserine.

Phosphoglycerides are the most numerous phospholipid molecules found in plasma membranes. Sphingophospholipids contain an amino alcohol called sphingosine instead of glycerol, a fatty acid, phosphate and an alcohol attached to the phosphate. In sphingophospholipid, the amino group of the sphingosine backbone is linked to a fatty acid by an amide bond. Sphingomyelin is the most abundant sphingophospholipid. The plasma membrane of animal cells contains four major phospholipids, such as phosphatidylcholine the most abundant glycerophospholipids in the plasma membrane , phosphatidylserine, phosphatidylethanolamine and sphingomyelin.

At neutral pH, the polar head group may have no net charge phosphatidylcholine and phosphatidyl- ethanolamine or it may have net negative charges phosphatidylinositol and phosphatidylserine. Rarer phospholipids have a net positive charge. Cell Structure and Functions 3. Electrogenic transport affects and can be affected by the membrane potential. Its electrogenic operation directly contributes to the negative inside membrane potential, which is evidenced by the fact that stopping the pump using an alkaloid inhibitor, ouabain, causes an immediate and slight depolarization of the cell membrane.

All cells have an electrical potential difference, or membrane potential, across their plasma membrane. Electrical potential across cell membranes is a function of the electrolyte concentrations in the intracellular and extracellular solutions and of the selective permeabilities of the ions. Active transport of ions by ATP-driven ion pumps, generate and maintain ionic gradients.

In addition to ion pumps, which transport ions against concentration gradients, plasma membrane contains channel protein that allows ions to move through it at different rates down their concentration gradient. Ion concentration gradients and selective movements of ions create a difference in electric potential or voltage across the plasma membrane.

This is called membrane potential. How membrane potentials arise? The resulting separation of charge across the membrane constitutes an electric potential, or voltage, with the left side of the membrane having excess negative charge with respect to the right. At equilibrium, an electrical potential is established across the membrane due to an accumulation of negative charges on the left side and positive charges on the right.

Cell Structure and Functions Let us now consider the changes in potential during an action potential, and the permeability and ion movements responsible for generating this change in potential. Movement of ions occurs through ion channels.

Ion channels may be either leaky channels or gated channels. Leaky channels, which are open all the time, permit unregulated leakage of specific ion across the membrane. Gated channels, in contrast, have gates that can be open or closed, permitting ion passage through the channels when open and preventing ion passage through the channels when closed. Action potentials are the direct consequence of the voltage-gated cation channels.

The channel undergoes through these various conformations as a result of voltage changes that take place during an action potential. This process is called repolarization. Instead, they alternate between closed and open states. Hence, an action potential has two main phases: a depolarizing phase and a repolarizing phase. During the depolarizing phase, the negative membrane potential becomes less negative, reaches zero, and then becomes positive.

During the repolarizing phase, the membrane potential is restored to the resting state of —70 mV. Following the repolarizing phase there may be an after-hyperpolarizing phase, during which the membrane potential temporarily becomes more negative about —90 mV than the resting level.

Gated Na and K channels closed Time millisecond Figure 3. The top graph depicts an action potential. The period of time after an action potential begins during which an excitable cell cannot generate another action potential in response to a normal threshold stimulus is called the refractory period. It can be absolute or relative. During the absolute refractory period, even a very strong stimulus cannot initiate a second action potential.

The relative refractory period is the time period during which a second action potential can be initiated, but only by a larger-than normal stimulus. The refractory period limit the number of action potentials that can be produced by an excitable membrane in a given period of time. Cell Structure and Functions plasma membrane at the opposite side. An example of transcytosis is the movement of maternal antibodies across the intestinal epithelial cells of the newborn rat.

The lumen of the gut is acidic, and, at this low pH, the antibodies in the milk bind to specific receptors on the apical absorptive surface of the gut epithelial cells. The receptor-antibody complexes are internalized via clathrin coated vesicles and are delivered to early endosomes.

The complexes remain intact and are retrieved in transport vesicles that bud from the early endosome and subsequently fuse with the basolateral domain of the plasma membrane. It may be a constitutive secretory pathway carried out by all cells or regulated secretory pathway carried out by specialized cells. Examples of proteins released by such constitutive or continuous secretion include collagen by fibroblasts, serum proteins by hepatocytes, and antibodies by activated B-lymphocytes.

Vesicle containing soluble proteins for constitutive secretion Constitutive secretory pathway Trans-Golgi network Extracellular space Regulated secretory pathway Secretory Golgi complex vesicle containing secretory proteins Plasma membrane Figure 3. The two pathways diverge in the trans Golgi network. The constitutive secretory pathway operates in all cells. Many soluble proteins are continually secreted from the cell by this pathway. This pathway also supplies the plasma membrane with newly synthesized lipids and proteins.

Specialized secretory cells also have a regulated secretory pathway, by which selected proteins in the trans Golgi network are diverted into secretory vesicles, where the proteins are concentrated and stored until an extracellular signal stimulates their secretion.

The regulated secretion of small molecules, such as histamine and neurotransmitters, occurs by a similar pathway. In this secretory pathway, secretory vesicles form from the trans Golgi network, and they release their contents to the cell exterior by exocytosis in response to specific signals. The secreted product can be either a small molecule such as histamine or a protein such as a hormone or digestive enzyme.

Proteins destined for secretion called secretory proteins are packaged into appropriate secretory vesicles in the trans Golgi network. The signal that directs secretory proteins into such vesicles is not known.

The ribosome is approximately globular structure, its average diameter ranging from 2. The functional ribosomes consist of two subunits of unequal size, known as the large and small subunits.

Ribosomes consist of rRNA and r-proteins. The r-proteins are termed as L or S depending on whether the protein is from the large or small subunit. Table 3. It is the ratio of a velocity to the centrifugal acceleration. The sedimentation coefficient has units of second. In all eukaryotes studied so far, the organization of the ribosomal RNA genes is recognizably similar to that of prokaryotes, but with major differences; the size of the small subunit RNA has increased from 16S to 18S, and that of the large subunit from 23S and 28S; a new small 5.

There are generally more copies of the 5S genes than of the rRNA genes. The human genome contains about copies of rRNA genes per haploid set. Many other species, including most plants, have several thousand copies. Protein translocation describes the movement of a protein across a membrane. Within the cell, translocation of proteins from cytosol to specific organelle or organelle to cytosol and from one organelle to another occur in three different ways: 1.

Gated transport : The protein translocation between the cytosol and nucleus occurs through the nuclear pore complexes. This process is called gated transport because the nuclear pore complexes function as selective gates that can actively transport specific macromolecules. Transmembrane transport : In transmembrane transport, membrane-bound protein translocators directly transport specific proteins across a membrane from the cytosol into a organelle.

The transport of selected proteins from the cytosol into the ER lumen or into mitochondria is an example of transmembrane transport. Vesicular transport : In vesicular transport, proteins move from one organelle to another through transport vesicles. The transfer of proteins from the endoplasmic reticulum to the Golgi apparatus, for example, occurs in this way.

Protein translocation may occur co-translationally or post-translationally. Proteins synthesized by membrane bound ribosomes are translocated co-translationally. All proteins synthesized by membrane free ribosomes are translocated post-translationally.

It is an extensive network of closed and flattened membrane-bound structure. The enclosed compartment is called the ER lumen. ER membranes are physiologically active, interact with the cytoskeleton and contain differentiated domains specialized for distinct functions.

ER membranes are differentiated into rough and smooth regions RER and SER, respectively , depending on whether ribosomes are associated with their cytoplasmic surfaces. When cells are disrupted by homogenization, the ER breaks into fragments and reseals into small vesicles called microsomes.

Microsomes derived from RER are studded with ribosomes on the outer surface and are called rough microsomes. Microsomes lacking attached ribosomes are called smooth microsome.

The cisternal space or lumen remains continuous with the perinuclear space. Function of ER Proteins synthesized by ribosomes associated with the membrane of RER enter into the lumen and membrane of RER by the process of co-translational translocation.

In the lumen of the RER, five principal modifications of proteins occur before they reach their final destinations: addition and processing of carbohydrates N-linked glycosylation , formation of disulfide bonds, proper folding, specific proteolytic cleavages and assembly into multimeric proteins.

The SER acts as the site of lipid biosynthesis, detoxification and calcium regulation. N-linked glycosylation of proteins N-linked glycosylation is the attachment of a sugar molecule to a nitrogen atom in an amino acid residue in a protein. In the RER, this process involves the addition of a large preformed oligosaccharide precursor to a protein.

This precursor oligosaccharide is linked by a pyrophosphoryl residue to dolichol, a long-chain 75—95 carbon atoms polyisoprenoid lipid that is firmly embedded in the RER membrane and acts as a carrier for the oligosaccharide. The structure of N-linked oligosaccharide is the same in plants, animals and single-celled eukaryotes - a branched oligosaccharide, containing three glucose Glc , nine mannose Man and two N-acetylglucosamine GlcNAc molecules which is written as Glc3 Man9 GlcNAc2.

Biosynthesis of oligosaccharide begins on the cytosolic face of the ER membrane with the transfer of N-acetyl glucosamine to dolichol phosphate. Two N-acetylglucosamine GlcNAc and five mannose residues are added one at a time to a dolichol phosphate on the cytosolic face of the ER membrane.

The first sugar, N-acetyl glucosamine, is linked to dolichol by a pyrophosphate bridge. This high-energy bond activates the oligosaccharide for its transfer from the dolichol to an asparagine side chain of a nascent polypeptide on the luminal side of the rough ER. Tunicamycin, an antibiotic, blocks the first step in this pathway and thus inhibits the synthesis of oligosaccharide.

After the seven-residue dolichol pyrophosphoryl intermediate is flipped to the luminal face. The remaining four mannose and all three glucose residues are added one at a time in the luminal side. Cell Structure and Functions Table 3.

ER-resident proteins often are retrieved from the Cis-Golgi As we have mentioned in the previous section that proteins entering into the lumen of the ER are of two types- resident proteins and export proteins.

How, then, are resident proteins retained in the ER lumen to carry out their work? The answer lies in a specific C-terminal sequence present in resident ER proteins.

Several experiments demonstrated that the KDEL sequence which acts as sorting signal, is both necessary and sufficient for retention in the ER. If this ER retention signal is removed from BiP, for example, the protein is secreted from the cell; and if the signal is transferred to a protein that is normally secreted, the protein is now retained in the ER. The finding that most KDEL receptors are localized to the membranes of small transport vesicles shuttling between the ER and the cis-Golgi also supports this concept.

The retention of transmembrane proteins in the ER is carried out by short C-terminal sequences that contain two lysine residues KKXX sequences. How can the affinity of the KDEL receptor change depending on the compartment in which it resides? The answer may be related to the differences in pH.

Clearly, the transport of newly synthesized proteins from the RER to the Golgi cisternae is a highly selective and regulated process. The selective entry of proteins into membrane-bound transport vesicles is an important feature of protein targeting as we will encounter them several times in our study of the subsequent stages in the maturation of secretory and membrane proteins. The Golgi complex, also termed as Golgi body or Golgi apparatus, is a single membrane bound organelle and part of endomembrane system.

It consists of five to eight flattened membrane-bound sacs called the cisternae. Each stack of cisternae is termed as Golgi stack or dictyosome. The cisternae in Golgi stack vary in number, shape and organization in different cell types. The typical diagrammatic representation of three major cisternae cis, medial and trans as shown in the figure 3.

In some unicellular flagellates, however, as many as 60 cisternae may combine to make up the Golgi stack. The number of Golgi complexes in a cell varies according to its function. A mammalian cell typically contains 40 to stacks. In mammalian cells, multiple Golgi stacks are linked together at their edges. Each Golgi stack has two distinct faces: a cis face or entry face or forming face and a trans face or maturing face.

Proteins and lipids enter the cis Golgi network in vesicular tubular clusters arriving from the ER and exit from the trans Golgi network. Both networks are thought to be important for protein sorting. Similarly, proteins exiting from the TGN can either move onward and be sorted according to whether they are destined for lysosomes, secretory vesicles, or the cell surface, or be returned to an earlier compartment.

The Golgi apparatus is especially prominent in cells that are specialized for secretion, such as the goblet cells of the intestinal epithelium, which secrete large amounts of polysaccharide-rich mucus into the gut. In such cells, unusually large secretory vesicles are found on the trans side of the Golgi apparatus. Secretory vesicles form from the trans Golgi network, and they release their contents to the cell exterior by exocytosis.

It modifies proteins and lipids that have been built in the endoplasmic reticulum and prepares them for export outside of the cell or for transport to other locations in the cell. Proteins and lipids from the smooth and rough endoplasmic reticulum bud off in tiny bubble-like vesicles that move through the cytoplasm until they reach the Golgi apparatus.

The vesicles fuse with the Golgi membranes and release their internally stored molecules into the organelle. Once inside, the compounds are further processed by the Golgi apparatus.

When completed, the product is extruded from the Golgi apparatus in a vesicle and directed to its final destination inside or outside the cell.

The modifications to molecules that take place in the Golgi apparatus occur in an orderly fashion. Substances from ER enter into the cis face of a Golgi stack for processing and exit from trans face. Idk where tf they expect you to get that shit legitimately. If not here, is there a place you ppl recommend to find hi-res images of card games?

Try looking up the artist themselves should be on the card and you should be able to find a gallery of their work. The site's owners have been dead quiet lately. I miss it, site was extremely useful. I'm looking for the Advanced Player's Guide for Pathfinder 2e. Thanks in advance for any help.

Thank you unknown moderator who is the only one who can handle us fucking shit lords. I have a loooong list of books I'm looking for, but most are old and not worth posting here. The admin supposedly is working on getting it back up. I've had some decent luck using eMule to find books. Still a relatively active community there. It was never released commercially, but apparently copies were given out at different times to people.

Would love to complete the set. The earlier link is no longer available :. I know it's a long shot, but Looking for fantasy grounds bundles DM's guide, monster manual, player's guide, Can someone hook me up with trove alternatives? I took it for granted and now I can't get my hands on starfinder pdfs. Anyone have the 3d print stl files for the Punga blood bowl patreon teams? The Gruen Trove for virtual table resources and soundtracks is down. Anyone have an alternative? Looking for I'm looking for the rulebooks for 3rd and 4th edition 40k specifically and anything else from that period would be nice but is just icing on the grim dark cake.

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