Red Bell Pepper Chromoplasts Exhibit in Vitro Import Competency and Membrane Targeting of Passenger Proteins from the Thylakoidal Sec and ΔpH Pathways but Not the Chloroplast Signal Recognition Particle Pathway1

Chloroplast to chromoplast development involves new synthesis and plastid localization of nuclear-encoded proteins, as well as changes in the organization of internal plastid membrane compartments. We have demonstrated that isolated red bell pepper (Capsicum annuum) chromoplasts contain the 75-kD component of the chloroplast outer envelope translocon (Toc75) and are capable of importing chloroplast precursors in an ATP-dependent fashion, indicating a functional general import apparatus. The isolated chromoplasts were able to further localize the 33- and 17-kD subunits of the photosystem II O2-evolution complex (OE33 and OE17, respectively), lumen-targeted precursors that utilize the thylakoidal Sec and ΔpH pathways, respectively, to the lumen of an internal membrane compartment. Chromoplasts contained the thylakoid Sec component protein, cpSecA, at levels comparable to chloroplasts. Routing of OE17 to the lumen was abolished by ionophores, suggesting that routing is dependent on a transmembrane ΔpH. The chloroplast signal recognition particle pathway precursor major photosystem II light-harvesting chlorophyll a/b protein failed to associate with chromoplast membranes and instead accumulated in the stroma following import. The Pftf (plastid fusion/translocation factor), a chromoplast protein, integrated into the internal membranes of chromoplasts during in vitro assays, and immunoblot analysis indicated that endogenous plastid fusion/translocation factor was also an integral membrane protein of chromoplasts. These data demonstrate that the internal membranes of chromoplasts are functional with respect to protein translocation on the thylakoid Sec and ΔpH pathways.

Early Pleistocene 40Ar/39Ar ages for Bapang Formation hominins, Central Jawa, Indonesia

The Sangiran dome is the primary stratigraphic window for the Plio-Pleistocene deposits of the Solo basin of Central Jawa. The dome has yielded nearly 80 Homo erectus fossils, around 50 of which have known findspots. With a hornblende 40Ar/39Ar plateau age of 1.66 ± 0.04 mega-annum (Ma) reportedly associated with two fossils [Swisher, C.C., III, Curtis, G. H., Jacob, T., Getty, A. G., Suprijo, A. & Widiasmoro (1994) Science 263, 1118–1121), the dome offers evidence that early Homo dispersed to East Asia during the earliest Pleistocene. Unfortunately, the hornblende pumice was sampled at Jokotingkir Hill, a central locality with complex lithostratigraphic deformation and dubious specimen provenance. To address the antiquity of Sangiran H. erectus more systematically, we investigate the sedimentary framework and hornblende 40Ar/39Ar age for volcanic deposits in the southeast quadrant of the dome. In this sector, Bapang (Kabuh) sediments have their largest exposure, least deformation, and most complete tephrostratigraphy. At five locations, we identify a sequence of sedimentary cycles in which H. erectus fossils are associated with epiclastic pumice. From sampled pumice, eight hornblende separates produced 40Ar/39Ar plateau ages ranging from 1.51 ± 0.08 Ma at the Bapang/Sangiran Formation contact, to 1.02 ± 0.06 Ma, at a point above the hominin-bearing sequence. The chronological sequence of 40Ar/39Ar ages follows stratigraphic order across the southeast quadrant. An intermediate level yielding four nearly complete crania has an age of about 1.25 Ma.

Molecular Characterization of an Arabidopsis Gene Encoding Hydroperoxide Lyase, a Cytochrome P-450 That Is Wound Inducible1

Hydroperoxide lyase (HPL) cleaves lipid hydroperoxides to produce volatile flavor molecules and also potential signal molecules. We have characterized a gene from Arabidopsis that is homologous to a recently cloned HPL from green pepper (Capsicum annuum). The deduced protein sequence indicates that this gene encodes a cytochrome P-450 with a structure similar to that of allene oxide synthase. The gene was cloned into an expression vector and expressed in Escherichia coli to demonstrate HPL activity. Significant HPL activity was evident when 13S-hydroperoxy-9(Z),11(E),15(Z)-octadecatrienoic acid was used as the substrate, whereas activity with 13S-hydroperoxy-9(Z),11(E)-octadecadienoic acid was approximately 10-fold lower. Analysis of headspace volatiles by gas chromatography-mass spectrometry, after addition of the substrate to E. coli extracts expressing the protein, confirmed enzyme-activity data, since cis-3-hexenal was produced by the enzymatic activity of the encoded protein, whereas hexanal production was limited. Molecular characterization of this gene indicates that it is expressed at high levels in floral tissue and is wound inducible but, unlike allene oxide synthase, it is not induced by treatment with methyl jasmonate.

Dedicated Roles of Plastid Transketolases during the Early Onset of Isoprenoid Biogenesis in Pepper Fruits1

Isopentenyl diphosphate (IPP), which is produced from mevalonic acid or other nonmevalonic substrates, is the universal precursor of isoprenoids in nature. Despite the presence of several isoprenoid compounds in plastids, enzymes of the mevalonate pathway leading to IPP formation have never been isolated or identified to our knowledge. We now describe the characterization of two pepper (Capsicum annuum L.) cDNAs, CapTKT1 and CapTKT2, that encode transketolases having distinct and dedicated specificities. CapTKT1 is primarily involved in plastidial pentose phosphate and glycolytic cycle integration, whereas CapTKT2 initiates the synthesis of isoprenoids in plastids via the nonmevalonic acid pathway. From pyruvate and glyceraldehyde-3-phosphate, CapTKT2 catalyzes the formation of 1-deoxy-xylulose-5-phosphate, the IPP precursor. CapTKT1 is almost constitutively expressed during the chloroplast-to-chromoplast transition, whereas CapTKT2 is overexpressed during this period, probably to furnish the IPP necessary for increased carotenoid biosynthesis. Because deoxy-xylulose phosphate is shared by the plastid pathways of isoprenoid, thiamine (vitamin B1), and pyridoxine (vitamin B6) biosynthesis, our results may explain why albino phenotypes usually occur in thiamine-deficient plants.

Identification of a plastid protein involved in vesicle fusion and/or membrane protein translocation.

Structural evidence has accumulated suggesting that fusion and/or translocation factors are involved in plastid membrane biogenesis. To test this hypothesis, we have developed an in vitro system in which the extent of fusion and/or translocation is monitored by the conversion of the xanthophyll epoxide (antheraxanthin) into the red ketocarotenoid (capsanthin). Only chromoplast membrane vesicles from red pepper fruits (Capsicum annuum) contain the required enzyme. Vesicles prepared from the mutant yellow cultivar are devoid of this enzyme and accumulate antheraxanthin. The fusion and/or translocation activity is characterized by complementation due to the synthesis of capsanthin and the parallel decrease of antheraxanthin when the two types of vesicles are incubated together in the presence of plastid stroma. We show that the extent of conversion is dependent upon an ATP-requiring protein that is sensitive to N-ethylmaleimide. Further purification and immunological analysis have revealed that the active factor, designated plastid fusion and/or translocation factor (Pftf), resides in a protein of 72 kDa. cDNA cloning revealed that mature Pftf has significant homology to yeast and animal (NSF) or bacterial (Ftsh) proteins involved in vesicle fusion or membrane protein translocation.

NaOH and KOH for preparing activated carbons used in energy and environmental applications

Alkaline hydroxides, especially sodium and potassium hydroxides, are multi-million-ton per annum commodities and strong chemical bases that have large scale applications. Some of them are related with their consequent ability to degrade most materials, depending on the temperature used. As an example, these chemicals are involved in the manufacture of pulp and paper, textiles, biodiesels, soaps and detergents, acid gases removal (e.g., SO2) and others, as well as in many organic synthesis processes. Sodium and potassium hydroxides are strong and corrosive bases, but they are also very stable chemicals that can melt without decomposition, NaOH at 318ºC, and KOH at 360ºC. Hence, they can react with most materials, even with relatively inert ones such as carbon materials. Thus, at temperatures higher than 360ºC these melted hydroxides easily react with most types of carbon-containing raw materials (coals, lignocellulosic materials, pitches, etc.), as well as with most pure carbon materials (carbon fibers, carbon nanofibers and carbon nanotubes). This reaction occurs via a solid-liquid redox reaction in which both hydroxides (NaOH or KOH) are converted to the following main products: hydrogen, alkaline metals and alkaline carbonates, as a result of the carbon precursor oxidation. By controlling this reaction, and after a suitable washing process, good quality activated carbons (ACs), a classical type of porous materials, can be prepared. Such carbon activation by hydroxides, known since long time ago, continues to be under research due to the unique properties of the resulting activated carbons. They have promising high porosity developments and interesting pore size distributions. These two properties are important for new applications such as gas storage (e.g., natural gas or hydrogen), capture, storage and transport of carbon dioxide, electricity storage demands (EDLC-supercapacitors-) or pollution control. Because these applications require new and superior quality activated carbons, there is no doubt that among the different existing activating processes, the one based on the chemical reaction between the carbon precursor and the alkaline hydroxide (NaOH or KOH) gives the best activation results. The present article covers different aspects of the activation by hydroxides, including the characteristics of the resulting activated carbons and their performance in some environment-related applications. The following topics are discussed: i) variables of the preparation method, such as the nature of the hydroxide, the type of carbon precursor, the hydroxide/carbon precursor ratio, the mixing procedure of carbon precursor and hydroxide (impregnation of the precursor with a hydroxide solution or mixing both, hydroxide and carbon precursor, as solids), or the temperature and time of the reaction are discussed, analyzing their effect on the resulting porosity; ii) analysis of the main reactions occurring during the activation process, iii) comparative analysis of the porosity development obtained from different activation processes (e.g., CO2, steam, phosphoric acid and hydroxides activation); and iv) performance of the prepared activated carbon materials on a few applications, such as VOC removal, electricity and gas storages.

Triennial Catalogue annotated by Jeremy Belknap, 1791

The collection holds a heavily interleaved 1791 Triennial Catalogue annotated, in part, by Jeremy Belknap. A note by Harvard Librarian John Langdon Sibley, on the verso of the flyleaf, indicates a second annotator: "It should be observed that this catalogue is in the handwriting of two persons, Dr. Belknap & probably interlineations & additions by Rev. Dr. [John] Eliot. The interlineing part should not be too confidently relied on for accuracy. J. L. Sibley, April 14, 1848." The volume contains biographical notes, newspaper clippings, excerpts from manuscript and printed sources such as New England's First Fruits, the manuscript memoirs of Charles Chauncey, and John Winthrop's Journal, and a 1795 letter from Isaac Mansfield. In the letter, Mansfield references an item he believed to be written by his grandfather, Ames Cheever (Harvard AB 1707), and briefly describes his grandfather. A list of election sermon orators with dates is also pasted into the inside back cover, along with an obituary of the Rev. John Wales (Harvard AB 1728) from the Boston Post-Boy, March 4, 1765.

Sanctissimi domini nostri Benedicti Papae XIV Bullarium : tomus primus [-tertius]

Contiene: T. 1: In quo continentur constitutiones, epistolae ab initio pontificatus usque ad annum MDCCXLVI -- T. 2: In quo continentur constitutiones, epistolae ab anno MDCCXLVI ad totum annum MDCCXLVIII -- T. 3: In quo continentur constitutiones, epistolae, alique editae ab exitu anni MDCCXLVIII usque ad totum pontificatus annum XII ...

Illustres Cardinales Armandus. D. de Richelieu et Mazarinus, ... Secretissima instructio & historia universalis ab Anno 1624 usque ad hoc tempora ... cum observationibus politicis ...

Contiene: "Pacta et confoederationes, quorum notitia historiam galliae, et Ministerium utriusque Cardinalis tum Richelij tum Mazarini ... ab Anno 1610 usque ad Annum 1650", comienza en p. [155], vol. 2.

Hymnorum recognitio /

Mode of access: Internet.

Vollständiges Bücher-Lexicon ... 1750-1910 /

Publishers: 1834-41 (volumes 1-8) L. Schumann. 1848-87 (volumes 9-24) T. O. Weigel. 1891 (volumes 25-26) T. O. Weigel Nachfolger. 1895-1912 (volumes 27-36) C. H. Tauchnitz.

Repertorium botanices systematicae /

1. [Ranunculaceae-Mimosae] 1842.--2. [Chrysobalaneae-Monotropeae] Supplementum primum. 1843.--3. Synopsis Solanacearum, Schrophularinarum, Orobanchearum et Labiatarum in botanicorum scriptis ad hunc diem editis descriptarum. 1844-45.--4. Synopsis Verbenacearum, Myoporinearum, Selaginearum, Stilbinearum, Globulariearum et Plantaginearum omnium ad annum mdcccxliv. cognitarum. Additus est index ordinum, subordinum, generum, sectionum, specierum et synonymorum omnium in Repertorii botanices systematicae fasciculis 1-xxvi obviorum. 1844 & 1848.--5. Synopsis plantarum exogenearum dialy petalarum omnium inde ab anno mdcccxliii. detectarum, exhibens supplementum tertium ad ordines xcvi priores vegetabilium in Prodromo Candolleano descriptorum. 1845-46.--6. Synopsis plantarum exogenearum gamopetalarum post Prodromi Candolleani tomum decimum et Repertorii botanices systematicae fasciculum decimum sextum editos detectarum. 1846-47.

Ordinationes Praepositorum generalium communes toti Societati / auctoritate V Congregationis generalis recognitae [et] contractae

Praefactio ad instructiones, quae ex variis v. Congregationis deputationibus editae sunt. - Instructio ad renouationem spiritus ... - Instructio pro concionatoribus societatis ... - Instructio pro confessariis Societatis ... - Occupationes variae ... - Casus reseruati in Societate ... - Instructio pro nouitiis Societatis ... - Instructio pro scholasticis Societate ... - Ratio examinandi scholares Societatis ... - Instructio de promouendis ad ordine sacros. - Instructio pro iis qui aucturi sunt tertium annum probationis. - Ratio peragendi tertium annum probationis ... - Instructio pro annuis litteris Societatis ... - De libris ordinationum ... - Formula acceptandorum Collegiorum ... - Formula de promouendis ad gradus Societatis ... - Formula de aptis ad gubernandum ... - Formula celebrandorum contractuum ... - Formula catalogorum ... - Formula quae seruari debet ... - Instructio procoadiutoribus temporalibus societatis ... - Canones quintae congregationis generalis, auctoritate eiusdem confecti.

Ecclesiasticae historiae breviarium /

Pars prima: Quae complectitur Chronologiae Rudimenta & decem priorum seculorum synopsim -- Pars secunda: Quae complectitur Isagogem ad sacram Geographiam & progreditur usque ad annum Vulgaris Aereae millesimum septingentesimum sexagesimum.

Catalogus librorum impressorum qui in bibliotheca collegii ... Trinitatis ... juxta Dublin, adservantur.

Vol. 9, "Supplementum," incorporating the supplement issued with v. 1, contains: I. Litteras A et B, ab anno M.DCCC.XLIX. ad annum M.DCCC.LXXII. II. Addenda et corrigenda.